EP0840185A1 - Communication means and method allowing a precise timing of an event - Google Patents

Communication means and method allowing a precise timing of an event Download PDF

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Publication number
EP0840185A1
EP0840185A1 EP97410116A EP97410116A EP0840185A1 EP 0840185 A1 EP0840185 A1 EP 0840185A1 EP 97410116 A EP97410116 A EP 97410116A EP 97410116 A EP97410116 A EP 97410116A EP 0840185 A1 EP0840185 A1 EP 0840185A1
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EP
European Patent Office
Prior art keywords
communication
frame
information
station
processing
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EP97410116A
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German (de)
French (fr)
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EP0840185B1 (en
Inventor
Luc Weynachter
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Schneider Electric Industries SAS
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Schneider Electric SE
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G7/00—Synchronisation

Definitions

  • Known communication devices include a central and stations connected to the central by a communication network. Communication stations send to the central of information frames concerning, for example, the state of electrical devices associated with said stations.
  • the central unit processes the information frames in the order of arrival. But, for some applications, it is necessary to date the information received by the frames. In that case, a clock is connected to the central unit to provide the date and time.
  • the control unit then combines information representative of particular events received by the frames and time information provided by the clock.
  • the two types associated information is processed and then, for example, logged in memorization or display.
  • the event information is associated with time information when it is received by the central office.
  • this type of dating is not very precise. Indeed, quite a long time may elapse between the moment when an event occurs at a station and the moment when the information is dated in the central.
  • the object of the invention is a communication device and method allowing a precise dating of events.
  • the means for transmitting first means of communication of the power station provide, to the first means of determination, a signal representative of the transmission of a frame.
  • the first correction means provide the information processing means with information dated according to hourly information values provided by frames received by the means of reception of the first means of communication increased by first delay values provided by the first determination means.
  • the central unit includes storage means connected to the first means of determining delays.
  • the means for receiving the second means of communication of the station provide, to the second means of determination, a signal representative of reception of a frame.
  • the second correction means correct hourly information values, of frames provided by the reception means of the second communication means, depending on second delay values provided by the second determination means, values time information being increased by values representative of said second values delay.
  • the station includes processing means providing a frame comprising event information associated with schedule information, connected to the means of management of local time, event detection means and means transmission of the second means of communication.
  • the communication device of FIG. 1 comprises a central unit 1, a clock 2 connected to the central, an information processing device 3, a first and a second communication network 4 and 5 respectively, stations 6a, 6b and 6c connected to the first network 4 and stations 7a, 7b and 7c connected to the second network 5.
  • the control unit 1 communicates with the stations and receives representative information events detected by said stations.
  • the information is dated in the central then supplied to the processing device 3.
  • the device 3 allows, in particular, to memorize or record dated information.
  • Clock 2 provides the center with time information to date the events received by the central. This time information includes day and time information. They will be considered as the absolute time of the communication device.
  • said station When an event is detected by a station, said station sends a frame comprising information representative of the event.
  • the frame is received by the central processing unit the frames and date the information representative of events. Then the information dated are transmitted to the processing device 3.
  • This method of dating events is sufficient as long as the accuracy of the dating is not not critical. Indeed, a significant delay may elapse between the appearance of an event and the time of the dating of this event.
  • stations whose events must be precisely dated, include a management system of a local time.
  • This local time management device allows you to date an event as soon as it is detected by the station.
  • the station produces a frame comprising a information representative of the detected event and time information provided by the local time management system.
  • the frame, sent by the station is received and processed by the central. Then the information dated by the station is transferred to the device 3 of treatment.
  • the local time management system in the station avoids the problems of dating caused by the transmission time of the frame in the station and by the time frame reception and processing in the central.
  • the central unit clock and local time management devices must be synchronized. This synchronization is done by the transmission of frames containing synchronization time information. These frames are sent by the central to stations incorporating local time management devices.
  • the processing of frames in the central unit delays the sending of said frame to the stations. By therefore, the value of the frame time information is different from the absolute time of the clock when the frame is sent.
  • the problem of delay due to treatment is also present in the stations. Indeed, a time information frame received by a station is processed before being used by example to synchronize the local time management device. The treatment carried out in the station induces an additional delay which also affects the time information conveyed by the frame.
  • the processing times for sending and receiving hourly information frames from synchronization can also affect the accuracy of dating events if this dating must be very precise.
  • Figure 2 shows a diagram of a communication device, according to a mode of realization of the invention, allowing very precise dating of events.
  • the central unit 1 comprises a first circuit 8 for processing the transmission of frames and a first frame reception processing circuit 9 connected to a communication network 4, a first calculation module 10 connected to circuit 8 and to the clock 2, a storage circuit 11 connected to the calculation module 10, and a first correction module 12 connected to the calculation module 10 and to the circuit 9 for processing reception.
  • a station 6d also shown in FIG. 2, comprises a second circuit 13 of frame reception processing and a second frame transmission processing circuit 14 connected to network 4, a second calculation module 15 connected to second circuit 13, a second correction module 16 connected to circuit 13 and to calculation module 15, a local time management device 17 connected to the second correction module 16, and a event processing circuit 18 connected to the management device 17 and to the second transmission processing circuit 14.
  • the event processing circuit 18 of the station 6d is connected to an event detector 19d associated with the station 6d.
  • a second station 6e is connected to network 4 and a second detector 19th is associated with the second station 6th.
  • clock 2 sends, to transmission processing circuit 8 and to module 10 for calculation, a time transmission signal 20 comprising absolute time information CK1.
  • the processing circuit 8 processes the time information CK1 and sends a frame comprising this information.
  • the circuit 8 provides the module 10 with a signal 21 representative of the end of processing of the transmission of the frame comprising a hourly information.
  • the module 10 calculates a delay value EC1 representative of the delay between the instants of appearance of signals 20 and 21.
  • a signal 22 representative of the delay value EC1 is supplied to the storage circuit 11 to save the EC1 value.
  • the frame containing the time information sent by the central unit is received by the stations 6d and 6th.
  • the second circuit 13 for processing the frame reception provides the calculation module 15 with a signal 23 representative of the frame reception and a signal 24 comprising the time information CK1 after processing the reception of the frame.
  • the calculation module 15 calculates a delay value EC2 representative of the delay between the instants of appearance of signals 23 and 24.
  • a signal 25 representative of the delay value EC2 and signal 24 are supplied to the correction module 16.
  • the correction module 16 corrects the value of the hourly information CK1 supplied by the signal 24 to provide a signal 26 representative of a specific local time CKL1.
  • the correction consists in particular of adding the value EC2, representative of the delay of processing on reception of the frame, at the value of the hourly information received CK1. So, the value of local time is, at the time of correction, substantially equal to the sum values representative of the absolute time CK1 and of the duration of the delay EC2.
  • the signal 26 representative of the instantaneous value of the local time is supplied to the device 17 local time management.
  • the local time value is then synchronized in function of the absolute time value sent by the central unit and corrected by the module 16.
  • the device 17 includes a local clock which provides a local time CKL1 synchronized with the absolute time CK1 provided by the central. This local time can however be offset from the absolute time, by a value equal to the value of the EC1 central unit processing time.
  • the event detector 19d When the event detector 19d detects an EVST1 event, it provides a signal 27 representative of said event at the processing circuit 18.
  • the management device 17 provides at circuit 18 a signal representative of the local time at which the event occurs.
  • the processing circuit 18 provides a frame signal comprising information representative of the event and information representative of local time CKL1 at which the event occurred.
  • the transmission of the frame is then processed by the second circuit 14 for processing the transmission of frames which sends the frame on the network 4.
  • the frame sent by circuit 14 of the station is received by the central.
  • the first circuit 9 frame reception processing provides, to the first connection module 12, a signal 30 representative of event information and hourly hourly information local.
  • the correction module 12 corrects the value of the local time CKL1 of the frame in as a function of the EC1 value for delay in processing the central unit's transmission. This value delay is supplied to module 12 by calculation module 10 or by the storage 11.
  • the correction of the local time of the frame consists, in particular, in adding the value of the delay to the value representative of local time.
  • Information representative of the event and the corrected time at which the event is detected are supplied to the information processing device 3.
  • information schedule can have the following format: day, hour, minute, second, millisecond.
  • FIG. 3 shows a flowchart for sending a frame by a central unit 1.
  • a request to send a synchronization frame comprising a value CK1 absolute time is required.
  • the processing of the transmission of the frame is made.
  • the frame is sent and an end signal emission processing is provided.
  • a calculation of a delay EC1 is performed.
  • the value of the delay EC1 is stored.
  • a flowchart for receiving a frame by a station is shown in Figure 4.
  • the reception of a frame begins with a step 36 at an instant t3.
  • the treatment of reception of the frame comprising time information CK1 is carried out during a step 37.
  • the end of processing of the frame is detected.
  • a calculation of a delay EC2 is carried out.
  • a local time CKL1 is calculated, it corresponds approximately to the sum of the hourly information CK1 and EC2 delay.
  • the calculated value of the local time is loaded for synchronize the local time of the station with the absolute time of the central.
  • This method of receiving the station avoids the effects caused by the delay produced by the frame reception processing.
  • the correction is done directly in the single phase station.
  • FIG. 5 A flow diagram for sending a frame by a station is shown in Figure 5.
  • an EVST event is detected at a local time CKLST.
  • a processing is carried out to produce a frame comprising information concerning the event and hourly information representative of the local time at which the event occurred.
  • the frame is transmitted, during a step 44.
  • Frame reception by the control panel is represented by a flowchart in Figure 6.
  • a a step 45 the central unit processes the reception of a frame comprising information EVST event and CKLST local time information.
  • the control unit corrects the value of the hourly information for local time to date the event in absolute time.
  • the event is dated as if the time of appearance of the event was supplied directly by the clock associated with the central unit.
  • the central unit sends the information processing device a EVST event information dated in absolute time CKAEV.
  • This method of receiving the central unit overcomes the effects of the delay produced by the transmission of a frame by the central.
  • the correction is done in two phases.
  • a first phase consists in determining the delay in transmission and a second phase consists in correcting the time information of the frames received by the central unit as a function of the delay in transmission.
  • the accuracy of the dating events can be of the order of lms.
  • This communication device is particularly well suited to installation surveillance communication networks.
  • stations are associated with circuit breakers and where the detectors events are linked to trip units or auxiliary contacts.
  • a precise dating of events makes it easy to identify the place and time appearance of electrical faults.
  • the control unit 1 can communicate with the stations through several different networks.
  • a diagram of a communication network comprising a central unit communicating through two networks are shown in Figure 7.
  • the central unit 1 comprises two first processing circuits 8a and 8b of the transmission of frames connected respectively to networks 4 and 5, and two first frame reception processing circuits 9a and 9b also connected to the networks respectively 4 and 5.
  • a station 6f is connected to network 4 and a station 7d is connected to the network 5.
  • the clock 2 sends to circuits 8a, 8b and to module 10 CK1 time information in absolute time.
  • Each circuit 8a, 8b processes the transmission of a frame comprising time information CK1. Then, the circuits 8a and 8b supply the module 10 with signals respectively 21a and 21b when their respective frame is sent.
  • Module 10 calculates delays EC1 and EC2 due to the respective processing of the two circuits 8a and 8b, then stores them in the storage circuit 11.
  • circuit 9a When receiving frames from network 4, circuit 9a processes reception and sends a signal 30a comprising event information and time information local.
  • the correction module 12 corrects the time of the event in absolute time in function of the delay value EC1 determined during the synchronization phase. Then, the module 12 provides the device 3 with the information of the event dated in absolute time.
  • circuit 9b processes the reception of frames from network 5 and provides at module 12 a signal 30b comprising event and local time information.
  • the module 12 corrects the time of the event according to the EC2 delay previously determined then provides the device 3 with the information of the event dated in absolute time.
  • the clock 2 is represented next to the central unit, but it is obvious that this clock can be integrated into the central unit or remote far from the power plant.
  • the sending of synchronization frames can be triggered manually by a user or preferably automatically by the central.
  • the frequency of these frames can be, for example, predetermined and regular.
  • circuits and modules described above in the communication device can be separate or preferably integrated in the same microcontroller or microprocessor. Of even, functions of said circuits and modules can be realized in a form programmed operating with a microprocessor.

Abstract

The system consists of a central station (1) equipped with a clock (2), a data processor (3) and a series of remote stations (6e,6d) on a network (4). When a synchronising frame is initiated at the central station the transmission time representing a delay (EC1) is stored in a memory (11). When the synchronising frame is received at a remote station (6d) the time taken to process it's reception (EC2) is added to the time of initiation (CK1) to produce a synchronised local time (17). When subsequent events are reported to the central station by the remote station the central station transmission delay (EC1) stored in memory (11) is added to the synchronous time to produce an absolute event time (CKAEV).

Description

L'invention concerne un dispositif de communication comportant :

  • une centrale de communication comportant des premiers moyens de communication de trames,
  • au moins un réseau de communication connecté aux premiers moyens de communication de la centrale,
  • au moins une station comportant des seconds moyens de communication de trames connectés au réseau de communication,
  • une horloge connectée aux premiers moyens de communication de la centrale fournissant un signal d'information horaire, et
  • des moyens de traitement d'informations connectés à la centrale,
The invention relates to a communication device comprising:
  • a communication center comprising first frame communication means,
  • at least one communication network connected to the first communication means of the central,
  • at least one station comprising second frame communication means connected to the communication network,
  • a clock connected to the first communication means of the central unit providing a time information signal, and
  • information processing means connected to the central,

Des dispositifs de communication connus comportent une centrale et des stations reliées à la centrale par un réseau de communication. Les stations de communication envoient à la centrale des trames d'informations concernant, par exemple, l'état d'appareils électriques associés auxdites stations.Known communication devices include a central and stations connected to the central by a communication network. Communication stations send to the central of information frames concerning, for example, the state of electrical devices associated with said stations.

La centrale traite les trames d'informations dans l'ordre d'arrivée. Mais, pour certaines applications, il est nécessaire de dater les informations reçues par les trames. Dans ce cas, une horloge est connectée à la centrale pour fournir la date et l'heure.The central unit processes the information frames in the order of arrival. But, for some applications, it is necessary to date the information received by the frames. In that case, a clock is connected to the central unit to provide the date and time.

La centrale associe alors des informations représentatives d'événements particuliers reçus par les trames et des informations horaires fournies par l'horloge. Les deux types d'informations associées sont traités, puis, par exemple, consignés dans des dispositifs de mémorisation ou d'affichage.The control unit then combines information representative of particular events received by the frames and time information provided by the clock. The two types associated information is processed and then, for example, logged in memorization or display.

Dans ce mode de réalisation, les informations d'événements sont associées à des informations horaires au moment où elles sont reçues par la centrale. Cependant, ce type de datation n'est pas très précis. En effet, un temps assez important peut s'écouler entre l'instant où un événement apparaít au niveau d'une station et l'instant où l'information est datée dans la centrale. In this embodiment, the event information is associated with time information when it is received by the central office. However, this type of dating is not very precise. Indeed, quite a long time may elapse between the moment when an event occurs at a station and the moment when the information is dated in the central.

L'invention a pour but un dispositif et un procédé de communication permettant une datation précise d'événements.The object of the invention is a communication device and method allowing a precise dating of events.

Selon l'invention, le dispositif comporte :

  • des moyens de détermination de retards provoqués par le traitement de trames de communication comportant des informations horaires, connectés à des moyens de communication, et
  • des moyens de correction, connectés aux moyens de détermination et aux moyens de communication, pour corriger des informations horaires portées par des trames de communication.
According to the invention, the device comprises:
  • means for determining delays caused by the processing of communication frames comprising time information, connected to communication means, and
  • correction means, connected to the determination means and to the communication means, for correcting time information carried by communication frames.

Dans un mode préférentiel de réalisation de l'invention la centrale comporte :

  • des premiers moyens de détermination de retards, provoqués par les premiers moyens de communication de la centrale, connectés à l'horloge et à des moyens d'émission des premiers moyens de communication de la centrale, et
  • des premiers moyens de correction connectés aux premiers moyens de détermination, à des moyens de réception des premiers moyens de communication, et aux moyens de traitement d'informations.
In a preferred embodiment of the invention, the plant comprises:
  • first means for determining delays, caused by the first communication means of the central, connected to the clock and to transmission means of the first communication means of the central, and
  • first correction means connected to the first determination means, to means for receiving the first communication means, and to the information processing means.

Selon un développement du mode de réalisation préférentiel, les moyens d'émission des premiers moyens de communication de la centrale fournissent, aux premiers moyens de détermination, un signal représentatif de l'émission d'une trame.According to a development of the preferred embodiment, the means for transmitting first means of communication of the power station provide, to the first means of determination, a signal representative of the transmission of a frame.

Les premiers moyens de correction fournissent aux moyens de traitement d'informations des informations datées en fonction de valeurs d'information horaires fournies par des trames reçues par les moyens de réception des premiers moyens de communication augmentées de premières valeurs de retard fournies par les premiers moyens de détermination.The first correction means provide the information processing means with information dated according to hourly information values provided by frames received by the means of reception of the first means of communication increased by first delay values provided by the first determination means.

De préférence, la centrale comporte des moyens de mémorisation connectés aux premiers moyens de détermination de retards. Preferably, the central unit includes storage means connected to the first means of determining delays.

Dans un mode particulier de réalisation, au moins une station comporte :

  • des seconds moyens de détermination de retards, provoqués par les seconds moyens de communication de la station, connectés à des moyens de réception des seconds moyens de communication de la station, et
  • des seconds moyens de correction connectés aux seconds moyens de détermination, aux seconds moyens de réception des seconds moyens de communication de la station, et à des moyens de gestion d'une heure locale de la station.
In a particular embodiment, at least one station comprises:
  • second means for determining delays, caused by the second station communication means, connected to means for receiving the second station communication means, and
  • second correction means connected to the second determination means, to the second means for receiving the second communication means from the station, and to means for managing a local time of the station.

Selon un développement du mode particulier de réalisation, les moyens de réception des seconds moyens de communication de la station fournissent, aux seconds moyens de détermination, un signal représentatif de réception d'une trame.According to a development of the particular embodiment, the means for receiving the second means of communication of the station provide, to the second means of determination, a signal representative of reception of a frame.

Les seconds moyens de correction corrigent des valeurs d'information horaires, de trames fournies par les moyens de réception des seconds moyens de communication, en fonction de secondes valeurs de retard fournies par les seconds moyens de détermination, des valeurs d'information horaires étant augmentées de valeurs représentatives desdites secondes valeurs de retard.The second correction means correct hourly information values, of frames provided by the reception means of the second communication means, depending on second delay values provided by the second determination means, values time information being increased by values representative of said second values delay.

La station comporte des moyens de traitement fournissant une trame comportant des informations d'événement associées à des informations d'horaire, connectés aux moyens de gestion d'une heure locale, à des moyens de détection d'événements et à des moyens d'émission des seconds moyens de communication.The station includes processing means providing a frame comprising event information associated with schedule information, connected to the means of management of local time, event detection means and means transmission of the second means of communication.

Un premier procédé selon l'invention comporte :

  • une étape de requête d'émission d'une première trame comportant une information horaire,
  • une étape de traitement de l'émission de la première trame,
  • une étape de détermination de la durée de traitement de l'émission de la première trame,
  • une étape de mémorisation de la valeur de la durée de traitement de l'émission de la première trame,
  • une étape de réception d'une seconde trame comportant une seconde information horaire, et
  • une étape de correction de la seconde information horaire en fonction de la valeur de la durée de traitement de l'émission de la première trame.
A first method according to the invention comprises:
  • a step of requesting transmission of a first frame comprising time information,
  • a step of processing the transmission of the first frame,
  • a step of determining the duration of processing of the transmission of the first frame,
  • a step of memorizing the value of the processing time of the transmission of the first frame,
  • a step of receiving a second frame comprising second time information, and
  • a step of correcting the second time information as a function of the value of the processing time for the transmission of the first frame.

Un second procédé selon l'invention comporte :

  • une étape de détection de réception d'une première trame comportant une information horaire,
  • une étape de traitement de la réception de la première trame,
  • une étape de détermination de la durée de traitement de la réception de la première trame,
  • une étape de correction de la valeur de l'information horaire de la première trame,
  • une étape de chargement de la valeur corrigée, de l'information horaire, dans un gestionnaire d'heure locale,
  • une étape de détection d'événement,
  • une étape de constitution d'une seconde trame comportant une information sur l'événement et une information d'heure locale, et
  • une étape d'émission de la dite seconde trame.
A second method according to the invention comprises:
  • a step of detecting reception of a first frame comprising time information,
  • a step of processing the reception of the first frame,
  • a step of determining the processing time of the reception of the first frame,
  • a step of correcting the value of the hourly information of the first frame,
  • a step of loading the corrected value, of hourly information, into a local time manager,
  • an event detection step,
  • a step of constituting a second frame comprising information on the event and local time information, and
  • a step of transmitting said second frame.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre, de modes particuliers de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et représentés aux dessins annexés sur lesquels :

  • La figure 1 représente un schéma bloc d'un dispositif de communication de type connu.
  • La figure 2 représente un schéma bloc d'un dispositif de communication selon un mode de réalisation de l'invention.
  • La figure 3 montre un organigramme d'envoi d'une trame par une centrale d'un dispositif selon un mode de réalisation de l'invention.
  • La figure 4 montre un organigramme de réception d'une trame par une station d'un dispositif selon un mode de réalisation de l'invention.
  • Les figures 5 et 6 montrent deux organigrammes de traitement de trames respectivement envoyées par une station et reçues par une centrale.
  • La figure 7 représente un schéma bloc d'un dispositif de communication selon un second mode de réalisation de l'invention.
Other advantages and characteristics will emerge more clearly from the description which follows, of particular embodiments of the invention, given by way of nonlimiting examples, and represented in the appended drawings in which:
  • FIG. 1 represents a block diagram of a communication device of known type.
  • FIG. 2 represents a block diagram of a communication device according to an embodiment of the invention.
  • FIG. 3 shows a flowchart for sending a frame by a central unit of a device according to an embodiment of the invention.
  • FIG. 4 shows a flow diagram of reception of a frame by a station of a device according to an embodiment of the invention.
  • FIGS. 5 and 6 show two flow charts for processing frames sent respectively by a station and received by a central.
  • FIG. 7 represents a block diagram of a communication device according to a second embodiment of the invention.

Le dispositif de communication de la figure 1 comporte une centrale 1, une horloge 2 connectée à la centrale, un dispositif 3 de traitement d'informations, un premier et un second réseau de communication respectivement 4 et 5, des stations 6a, 6b et 6c connectées au premier réseau 4 et des stations 7a, 7b et 7c connectées au second réseau 5.The communication device of FIG. 1 comprises a central unit 1, a clock 2 connected to the central, an information processing device 3, a first and a second communication network 4 and 5 respectively, stations 6a, 6b and 6c connected to the first network 4 and stations 7a, 7b and 7c connected to the second network 5.

La centrale 1 communique avec les stations et reçoit des informations représentatives d'événements détectées par lesdites stations. Les informations sont datées dans la centrale puis fournies au dispositif 3 de traitement. Le dispositif 3 permet, notamment, de mémoriser ou de consigner les informations datées.The control unit 1 communicates with the stations and receives representative information events detected by said stations. The information is dated in the central then supplied to the processing device 3. The device 3 allows, in particular, to memorize or record dated information.

L'horloge 2 fournit à la centrale des informations horaires pour dater les événements reçus par la centrale. Ces informations horaires comportent des informations de jour et d'heure. Elles seront considérées comme l'heure absolue du dispositif de communication.Clock 2 provides the center with time information to date the events received by the central. This time information includes day and time information. They will be considered as the absolute time of the communication device.

Lorsqu'un événement est détecté par une station, ladite station envoie une trame comportant une information représentative de l'événement. La trame est reçue par la centrale qui traite les trames et date les informations représentatives d'événements. Ensuite, les informations datées sont transmises au dispositif 3 de traitement.When an event is detected by a station, said station sends a frame comprising information representative of the event. The frame is received by the central processing unit the frames and date the information representative of events. Then the information dated are transmitted to the processing device 3.

Ce mode de datation des événements est suffisant tant que la précision de la datation n'est pas critique. En effet, un retard important peut s'écouler entre l'apparition d'un événement et l'instant de la datation dudit événement.This method of dating events is sufficient as long as the accuracy of the dating is not not critical. Indeed, a significant delay may elapse between the appearance of an event and the time of the dating of this event.

Pour palier à cet inconvénient, dans un mode de réalisation de l'invention, des stations, dont les événements doivent être datés avec précision, comportent un dispositif de gestion d'une heure locale. Ce dispositif de gestion d'heure locale permet de dater un événement dès qu'il est détecté par la station. Ainsi, la station produit une trame comportant une information représentative de l'événement détecté et une information horaire fournie par le dispositif de gestion de l'heure locale. La trame, envoyée par la station, est reçue et traitée par la centrale. Puis l'information datée par la station est transférée vers le dispositif 3 de traitement. To overcome this drawback, in one embodiment of the invention, stations, whose events must be precisely dated, include a management system of a local time. This local time management device allows you to date an event as soon as it is detected by the station. Thus, the station produces a frame comprising a information representative of the detected event and time information provided by the local time management system. The frame, sent by the station, is received and processed by the central. Then the information dated by the station is transferred to the device 3 of treatment.

Le dispositif de gestion de l'heure locale dans la station permet d'éviter les problèmes de datation provoqués par le temps de transmission de la trame dans la station et par le temps de réception et de traitement de la trame dans la centrale.The local time management system in the station avoids the problems of dating caused by the transmission time of the frame in the station and by the time frame reception and processing in the central.

Pour garantir des informations horaires cohérentes dans l'ensemble du dispositif de communication, l'horloge de la centrale et les dispositifs de gestion d'heure locale doivent être synchronisés. Cette synchronisation est faite par la transmission de trames contenant des informations horaires de synchronisation. Ces trames sont envoyées par la centrale aux stations comportant des dispositifs de gestion d'heure locale.To guarantee consistent time information across the entire system communication, the central unit clock and local time management devices must be synchronized. This synchronization is done by the transmission of frames containing synchronization time information. These frames are sent by the central to stations incorporating local time management devices.

Le traitement des trames dans la centrale retarde l'envoi de ladite trame aux stations. Par conséquent, la valeur de l'information horaire de la trame est différente de l'heure absolue de l'horloge au moment de l'envoi de la trame.The processing of frames in the central unit delays the sending of said frame to the stations. By therefore, the value of the frame time information is different from the absolute time of the clock when the frame is sent.

Le problème de retard dû au traitement est aussi présent dans les stations. En effet, une trame d'information horaire reçue par une stations est traitée avant d'être utilisée par exemple pour synchroniser le dispositif de gestion de l'heure locale. Le traitement effectué dans la station induit un retard supplémentaire qui affecte aussi l'information horaire véhiculée par la trame.The problem of delay due to treatment is also present in the stations. Indeed, a time information frame received by a station is processed before being used by example to synchronize the local time management device. The treatment carried out in the station induces an additional delay which also affects the time information conveyed by the frame.

Les durées de traitement d'envoi et de réception des trames d'information horaire de synchronisation peuvent aussi altérer la précision de la datation des événements si cette datation doit être très précise.The processing times for sending and receiving hourly information frames from synchronization can also affect the accuracy of dating events if this dating must be very precise.

La figure 2 montre un schéma d'un dispositif de communication, selon un mode de réalisation de l'invention, permettant une datation très précise d'événements.Figure 2 shows a diagram of a communication device, according to a mode of realization of the invention, allowing very precise dating of events.

Dans ce mode de réalisation, la centrale 1 comporte un premier circuit 8 de traitement de l'émission de trames et un premier circuit 9 de traitement de réception de trame connectés à un réseau 4 de communication, un premier module de calcul 10 connecté au circuit 8 et à l'horloge 2, un circuit de mémorisation 11 connecté au module de calcul 10, et un premier module de correction 12 connecté au module de calcul 10 et au circuit 9 de traitement de réception. In this embodiment, the central unit 1 comprises a first circuit 8 for processing the transmission of frames and a first frame reception processing circuit 9 connected to a communication network 4, a first calculation module 10 connected to circuit 8 and to the clock 2, a storage circuit 11 connected to the calculation module 10, and a first correction module 12 connected to the calculation module 10 and to the circuit 9 for processing reception.

Une station 6d, représentée aussi sur la figure 2, comporte un second circuit 13 de traitement de réception de trame et un second circuit 14 de traitement d'émission de trames connectés au réseau 4, un second module de calcul 15 connecté au second circuit 13, un second module 16 de correction connecté au circuit 13 et au module de calcul 15, un dispositif de gestion d'heure locale 17 connecté au second module de correction 16, et un circuit de traitement d'événements 18 connecté au dispositif de gestion 17 et au second circuit de traitement d'émission 14. Le circuit de traitement 18 d'événement de la station 6d est relié à un détecteur d'événements 19d associé à la station 6d.A station 6d, also shown in FIG. 2, comprises a second circuit 13 of frame reception processing and a second frame transmission processing circuit 14 connected to network 4, a second calculation module 15 connected to second circuit 13, a second correction module 16 connected to circuit 13 and to calculation module 15, a local time management device 17 connected to the second correction module 16, and a event processing circuit 18 connected to the management device 17 and to the second transmission processing circuit 14. The event processing circuit 18 of the station 6d is connected to an event detector 19d associated with the station 6d.

Sur le schéma de la figure 2, une seconde station 6e est connectée au réseau 4 et un second détecteur 19e est associé à la seconde station 6e.In the diagram in Figure 2, a second station 6e is connected to network 4 and a second detector 19th is associated with the second station 6th.

Dans le mode de réalisation de la figure 2, lors d'une phase de synchronisation de l'heure locale des stations, l'horloge 2 envoie, au circuit de traitement 8 d'émission et au module 10 de calcul, un signal 20 d'émission d'heure comportant une information d'heure absolue CK1.In the embodiment of FIG. 2, during a time synchronization phase local station, clock 2 sends, to transmission processing circuit 8 and to module 10 for calculation, a time transmission signal 20 comprising absolute time information CK1.

Le circuit de traitement 8 traite l'information horaire CK1 et envoie une trame comportant cette information. Lorsque la trame est envoyée, le circuit 8 fournit au module 10 un signal 21 représentatif de la fin de traitement de l'émission de la trame comportant une information horaire. Le module 10 calcule une valeur de retard EC1 représentative du retard entre les instants d'apparition des signaux 20 et 21.The processing circuit 8 processes the time information CK1 and sends a frame comprising this information. When the frame is sent, the circuit 8 provides the module 10 with a signal 21 representative of the end of processing of the transmission of the frame comprising a hourly information. The module 10 calculates a delay value EC1 representative of the delay between the instants of appearance of signals 20 and 21.

Un signal 22 représentatif de la valeur de retard EC1 est fourni au circuit de mémorisation 11 pour sauvegarder la valeur EC1.A signal 22 representative of the delay value EC1 is supplied to the storage circuit 11 to save the EC1 value.

La trame comportant l'information horaire envoyée par la centrale est reçue par les stations 6d et 6e. Dans la station 6d, le second circuit 13 de traitement de la réception de trame fournit au module de calcul 15 un signal 23 représentatif de la réception de trame et un signal 24 comportant l'information horaire CK1 après traitement de la réception de la trame. The frame containing the time information sent by the central unit is received by the stations 6d and 6th. In station 6d, the second circuit 13 for processing the frame reception provides the calculation module 15 with a signal 23 representative of the frame reception and a signal 24 comprising the time information CK1 after processing the reception of the frame.

Le module de calcul 15 calcule une valeur de retard EC2 représentative du retard entre les instants d'apparition des signaux 23 et 24. Un signal 25 représentatif de la valeur de retard EC2 et le signal 24 sont fournis au module de correction 16.The calculation module 15 calculates a delay value EC2 representative of the delay between the instants of appearance of signals 23 and 24. A signal 25 representative of the delay value EC2 and signal 24 are supplied to the correction module 16.

Le module de correction 16 corrige la valeur de l'information horaire CK1 fournie par le signal 24 pour fournir un signal 26 représentatif d'une heure locale CKL1 précise. La correction consiste notamment à ajouter la valeur EC2, représentative du retard de traitement à la réception de la trame, à la valeur de l'information horaire reçue CK1. Ainsi, la valeur de l'heure locale est, au moment de la correction, sensiblement égale à la somme des valeurs représentatives de l'heure absolue CK1 et de la durée du retard EC2.The correction module 16 corrects the value of the hourly information CK1 supplied by the signal 24 to provide a signal 26 representative of a specific local time CKL1. The correction consists in particular of adding the value EC2, representative of the delay of processing on reception of the frame, at the value of the hourly information received CK1. So, the value of local time is, at the time of correction, substantially equal to the sum values representative of the absolute time CK1 and of the duration of the delay EC2.

Le signal 26 représentatif de la valeur instantanée de l'heure locale est fourni au dispositif 17 de gestion de l'heure locale. La valeur de l'heure locale est alors synchronisée en fonction de la valeur de l'heure absolue envoyée par la centrale et corrigée par le module 16. Lorsque la synchronisation est effectuée, le dispositif 17 comporte une horloge locale qui fournit une heure locale CKL1 synchronisée avec l'heure absolue CK1 fournie par la centrale. Cette heure locale peut cependant être décalée par rapport à l'heure absolue, d'une valeur égale à la valeur de la durée de traitement de la centrale EC1.The signal 26 representative of the instantaneous value of the local time is supplied to the device 17 local time management. The local time value is then synchronized in function of the absolute time value sent by the central unit and corrected by the module 16. When synchronization is carried out, the device 17 includes a local clock which provides a local time CKL1 synchronized with the absolute time CK1 provided by the central. This local time can however be offset from the absolute time, by a value equal to the value of the EC1 central unit processing time.

Lorsque le détecteur d'événement 19d détecte un événement EVST1, il fournit un signal 27 représentatif dudit événement au circuit de traitement 18. Le dispositif de gestion 17 fournit au circuit 18 un signal représentatif de l'heure locale à laquelle l'événement apparaít. Puis, le circuit de traitement 18 fournit un signal de trame comportant une information représentative de l'événement et une information représentative de l'heure locale CKL1 à laquelle l'événement est apparu. L'émission de la trame est ensuite traitée par le second circuit 14 de traitement de l'émission de trames qui envoie la trame sur le réseau 4.When the event detector 19d detects an EVST1 event, it provides a signal 27 representative of said event at the processing circuit 18. The management device 17 provides at circuit 18 a signal representative of the local time at which the event occurs. Then, the processing circuit 18 provides a frame signal comprising information representative of the event and information representative of local time CKL1 at which the event occurred. The transmission of the frame is then processed by the second circuit 14 for processing the transmission of frames which sends the frame on the network 4.

La trame envoyée par le circuit 14 de la station est reçue par la centrale. Le premier circuit 9 de traitement de réception de trames fournit, au premier module de connexion 12, un signal 30 représentatif de l'information de l'événement et de l'information horaire en heure locale. Le module de correction 12 corrige la valeur de l'heure locale CKL1 de la trame en fonction de la valeur EC1 de retard de traitement de l'émission de la centrale. Cette valeur de retard est fournie au module 12 par le module de calcul 10 ou par le circuit de mémorisation 11. The frame sent by circuit 14 of the station is received by the central. The first circuit 9 frame reception processing provides, to the first connection module 12, a signal 30 representative of event information and hourly hourly information local. The correction module 12 corrects the value of the local time CKL1 of the frame in as a function of the EC1 value for delay in processing the central unit's transmission. This value delay is supplied to module 12 by calculation module 10 or by the storage 11.

La correction de l'heure locale de la trame consiste, notamment, à ajouter la valeur du retard à la valeur représentative de l'heure locale.The correction of the local time of the frame consists, in particular, in adding the value of the delay to the value representative of local time.

Les informations représentatives de l'événement et de l'heure corrigée à laquelle l'événement est détecté sont fournies au dispositif 3 de traitement de l'information.Information representative of the event and the corrected time at which the event is detected are supplied to the information processing device 3.

Avec la correction de l'information horaire dans la centrale par le module 12 et dans les stations par le module 15, les événements venant des stations avec des modules 15 de correction sont datés en heure absolue. La datation de ces événements est donc très précise et la chronologie de l'apparition des événements peut être efficacement traitée par le dispositif 3.With the correction of the time information in the control panel by module 12 and in the stations by module 15, events coming from stations with modules 15 of correction are dated in absolute time. The dating of these events is therefore very precise and the chronology of the occurrence of events can be effectively treated by the device 3.

Puisque la datation peut être très précise, de l'ordre de la milliseconde, les informations horaires peuvent être exprimées aussi à la milliseconde près. Par exemple, une information horaire peut avoir le format suivant : jour, heure, minute, seconde, milliseconde.Since the dating can be very precise, of the order of a millisecond, the information times can also be expressed to the nearest millisecond. For example, information schedule can have the following format: day, hour, minute, second, millisecond.

La figure 3 montre un organigramme d'envoi d'une trame par une centrale 1. Dans ce procédé selon un mode de réalisation de l'invention, lors d'une première étape 31, à un instant t1, une demande d'émission de trame de synchronisation comportant une valeur CK1 d'heure absolue est requise. Ensuite, pendant une étape 32, le traitement de l'émission de la trame est effectué. A un instant t2 (étape 33), la trame est envoyée et un signal de fin de traitement d'émission est fourni. Ensuite, à une étape 34, un calcul d'un retard EC1 est effectué. La valeur du retard EC1 est représentative de la durée entre les instants t2 et t1 (EC1 = t2 - t1). Dans une étape 35, la valeur du retard EC1 est mémorisée.Figure 3 shows a flowchart for sending a frame by a central unit 1. In this method according to one embodiment of the invention, during a first step 31, at a instant t1, a request to send a synchronization frame comprising a value CK1 absolute time is required. Then, during a step 32, the processing of the transmission of the frame is made. At an instant t2 (step 33), the frame is sent and an end signal emission processing is provided. Then, in a step 34, a calculation of a delay EC1 is performed. The value of the delay EC1 is representative of the duration between the instants t2 and t1 (EC1 = t2 - t1). In a step 35, the value of the delay EC1 is stored.

Un organigramme de réception d'une trame par une station est représenté sur la figure 4. La réception d'une trame commence par une étape 36 à un instant t3. Puis, le traitement de la réception de la trame comportant une information horaire CK1 est réalisé pendant une étape 37. A un instant t4 (étape 38), la fin de traitement de la trame est détectée. Ensuite, à une étape 39, un calcul d'un retard EC2 est effectué. La valeur du retard EC2 est représentative de la durée entre les instants t4 et t3 (EC2 = t4 - t3). A une étape 40, une heure locale CKL1 est calculée, elle correspond sensiblement à la somme de l'information horaire CK1 et du retard EC2. Puis, à une étape 41 la valeur calculée de l'heure locale est chargée pour synchroniser l'heure locale de la station avec l'heure absolue de la centrale.A flowchart for receiving a frame by a station is shown in Figure 4. The reception of a frame begins with a step 36 at an instant t3. Then, the treatment of reception of the frame comprising time information CK1 is carried out during a step 37. At an instant t4 (step 38), the end of processing of the frame is detected. Then at a step 39, a calculation of a delay EC2 is carried out. The EC2 delay value is representative of the duration between instants t4 and t3 (EC2 = t4 - t3). At a stage 40, a local time CKL1 is calculated, it corresponds approximately to the sum of the hourly information CK1 and EC2 delay. Then, in a step 41, the calculated value of the local time is loaded for synchronize the local time of the station with the absolute time of the central.

Ce procédé de réception de la station permet d'éviter les effets provoqués par le retard produit par le traitement de la réception de trame. La correction se fait directement dans la station en une seule phase.This method of receiving the station avoids the effects caused by the delay produced by the frame reception processing. The correction is done directly in the single phase station.

Un organigramme d'envoi de trame par une station est représenté sur la figure 5. A une étape 42, un événement EVST est détecté à une heure locale CKLST. Ensuite, à une étape 43, un traitement est effectué pour produire une trame comportant une information concernant l'événement et une information horaire représentative de l'heure locale à laquelle l'événement s'est produit. Puis la trame est émise, lors d'une étape 44.A flow diagram for sending a frame by a station is shown in Figure 5. At a step 42, an EVST event is detected at a local time CKLST. Then at a stage 43, a processing is carried out to produce a frame comprising information concerning the event and hourly information representative of the local time at which the event occurred. Then the frame is transmitted, during a step 44.

La réception de trame par la centrale est représentée par un organigramme de la figure 6. A une étape 45, la centrale traite la réception d'une trame comportant une information d'événement EVST et une information horaire CKLST d'heure locale. Puis à une étape 46 la centrale corrige la valeur de l'information horaire d'heure locale pour dater événement en heure absolue. Ainsi, l'événement est daté comme si l'heure d'apparition de l'événement était fournie directement par l'horloge associée à la centrale. La correction de l'information horaire consiste à fournir une information horaire absolue CKAEV représentative de la somme de l'heure locale de l'événement CKLST et de la valeur du retard EC1 de traitement de l'émission de la trame de synchronisation par la centrale (CKAEV = CKLST + EC1). Ensuite, à une étape 47, la centrale envoie au dispositif de traitement d'information une information événement EVST datée en heure absolue CKAEV.Frame reception by the control panel is represented by a flowchart in Figure 6. A a step 45, the central unit processes the reception of a frame comprising information EVST event and CKLST local time information. Then in step 46 the control unit corrects the value of the hourly information for local time to date the event in absolute time. Thus, the event is dated as if the time of appearance of the event was supplied directly by the clock associated with the central unit. Correction of information timetable consists in providing absolute time information CKAEV representative of the sum of the local time of the CKLST event and the value of the EC1 processing delay the transmission of the synchronization frame by the central unit (CKAEV = CKLST + EC1). Then, in a step 47, the central unit sends the information processing device a EVST event information dated in absolute time CKAEV.

Ce procédé de réception de la centrale permet de s'affranchir des effets du retard produit par l'émission d'une trame par la centrale. Dans ce procédé la correction se fait en deux phases. Une première phase consiste à déterminer le retard à l'émission et une seconde phase consiste à corriger les informations horaires des trames reçues par la centrale en fonction du retard à l'émission.This method of receiving the central unit overcomes the effects of the delay produced by the transmission of a frame by the central. In this process the correction is done in two phases. A first phase consists in determining the delay in transmission and a second phase consists in correcting the time information of the frames received by the central unit as a function of the delay in transmission.

Dans les modes de réalisation selon l'invention décrits ci-dessus, la précision de la datation des événements peut être de l'ordre de lms. Ce dispositif de communication est particulièrement bien adapté à des réseaux de communication de surveillance d'installations. In the embodiments according to the invention described above, the accuracy of the dating events can be of the order of lms. This communication device is particularly well suited to installation surveillance communication networks.

Par exemple, lorsque les stations sont associées à des disjoncteurs et où les détecteurs d'événements sont reliés aux déclencheurs ou à des contacts auxiliaires. Dans ce cas, une datation précise des événements permet d'identifier facilement le lieu et l'instant d'apparition de défauts électriques.For example, when the stations are associated with circuit breakers and where the detectors events are linked to trip units or auxiliary contacts. In this case, a precise dating of events makes it easy to identify the place and time appearance of electrical faults.

La centrale 1 peut communiquer avec les stations à travers plusieurs réseaux différents. Un schéma d'un réseau de communication comportant une centrale communiquant à travers deux réseaux est représenté sur la figure 7.The control unit 1 can communicate with the stations through several different networks. A diagram of a communication network comprising a central unit communicating through two networks are shown in Figure 7.

Dans ce mode de réalisation, la centrale 1 comporte deux premiers circuits de traitement 8a et 8b de l'émission de trames connectés respectivement à des réseaux 4 et 5, et deux premiers circuits de traitement 9a et 9b de réception de trame connectés également aux réseaux respectivement 4 et 5. Une station 6f est connectée au réseau 4 et une station 7d est connectée au réseau 5.In this embodiment, the central unit 1 comprises two first processing circuits 8a and 8b of the transmission of frames connected respectively to networks 4 and 5, and two first frame reception processing circuits 9a and 9b also connected to the networks respectively 4 and 5. A station 6f is connected to network 4 and a station 7d is connected to the network 5.

Lors d'une phase de synchronisation, l'horloge 2 envoie aux circuits 8a, 8b et au module 10 une information horaire CK1 en heure absolue.During a synchronization phase, the clock 2 sends to circuits 8a, 8b and to module 10 CK1 time information in absolute time.

Chaque circuit 8a, 8b traite l'émission d'une trame comportant une information horaire CK1. Ensuite, les circuits 8a et 8b fournissent au module 10 des signaux respectivement 21a et 21b lorsque leur trame respective est envoyée.Each circuit 8a, 8b processes the transmission of a frame comprising time information CK1. Then, the circuits 8a and 8b supply the module 10 with signals respectively 21a and 21b when their respective frame is sent.

Le module 10 calcule des retards EC1 et EC2 dus aux traitements respectifs des deux circuits 8a et 8b, puis les stocke dans le circuit de mémorisation 11.Module 10 calculates delays EC1 and EC2 due to the respective processing of the two circuits 8a and 8b, then stores them in the storage circuit 11.

Lors de la réception de trames provenant du réseau 4, le circuit 9a traite la réception et envoie un signal 30a comportant une information d'événement et une information d'heure locale. Le module de correction 12 corrige l'heure de l'événement en heure absolue en fonction de la valeur de retard EC1 déterminée pendant la phase de synchronisation. Puis, le module 12 fournit au dispositif 3 l'information de l'événement daté en heure absolue.When receiving frames from network 4, circuit 9a processes reception and sends a signal 30a comprising event information and time information local. The correction module 12 corrects the time of the event in absolute time in function of the delay value EC1 determined during the synchronization phase. Then, the module 12 provides the device 3 with the information of the event dated in absolute time.

De la même manière, le circuit 9b traite la réception de trames venant du réseau 5 et fournit au module 12 un signal 30b comportant des informations événements et d'heure locale. Le module 12 corrige l'heure de l'événement en fonction du retard EC2 déterminé auparavant puis fournit au dispositif 3 l'information de l'événement daté en heure absolue.Similarly, circuit 9b processes the reception of frames from network 5 and provides at module 12 a signal 30b comprising event and local time information. The module 12 corrects the time of the event according to the EC2 delay previously determined then provides the device 3 with the information of the event dated in absolute time.

Dans les modes de réalisation ci-dessus, l'horloge 2 est représentée à côté de la centrale, mais il est bien évident que cette horloge peut être intégrée à la centrale ou déportée loin de la centrale.In the above embodiments, the clock 2 is represented next to the central unit, but it is obvious that this clock can be integrated into the central unit or remote far from the power plant.

Dans les dispositifs de communication selon des modes de réalisation de l'invention, il n'est pas nécessaire que tous les événements, détectés par toutes les stations, soient datés de manière très précise. Les dispositifs peuvent avoir sur des mêmes réseaux ou sur des réseaux différents des stations à événements datés de manière très précise et des stations à événements datés de manière moins précise.In the communication devices according to embodiments of the invention, it is not not all events, detected by all stations, must be dated very precisely. Devices can have on the same networks or on different networks from very precisely dated event stations and from less precisely dated events.

L'envoi de trames de synchronisation peut être déclenché de manière manuelle par un utilisateur ou de préférence de manière automatique par la centrale. La périodicité de ces trames peut être, par exemple, prédéterminée et régulière.The sending of synchronization frames can be triggered manually by a user or preferably automatically by the central. The frequency of these frames can be, for example, predetermined and regular.

Les circuits et modules décrits ci-dessus dans le dispositif de communication peuvent être séparés ou de préférence intégrés dans un même micro-contrôleur ou microprocesseur. De même, des fonctions desdits circuits et modules peuvent être réalisées sous une forme programmée fonctionnant avec un microprocesseur.The circuits and modules described above in the communication device can be separate or preferably integrated in the same microcontroller or microprocessor. Of even, functions of said circuits and modules can be realized in a form programmed operating with a microprocessor.

Claims (10)

Dispositif de communication comportant : une centrale (1) de communication comportant des premiers moyens (8, 9, 8a, 9a, 8b, 9b) de communication de trames, au moins un réseau (4, 5) de communication connecté aux premiers moyens de communication de la centrale, au moins une station (6a-6f, 7a-7d) comportant des seconds moyens (13, 14) de communication de trames connectés au réseau de communication, une horloge (2) connectée aux premiers moyens de communication de la centrale fournissant un signal (20) d'information horaire, et - des moyens (3) de traitement d'informations connectés à la centrale, dispositif caractérisé en ce que la centrale (1) comporte : des premiers moyens (10) de détermination de retards, provoqués par le traitement de trames de communication comportant des informations horaires dans les premiers moyens de communication de la centrale, connectés à l'horloge et à des moyens (8, 8a, 8b) d'émission des premiers moyens de communication de la centrale, et des premiers moyens (12) de correction connectés aux premiers moyens (10) de détermination, à des moyens (9, 9a, 9b) de réception des premiers moyens de communication, et aux moyens (3) de traitement d'informations pour corriger des informations horaires portées par des trames de communication. Communication device comprising: a communication center (1) comprising first means (8, 9, 8a, 9a, 8b, 9b) for frame communication, at least one communication network (4, 5) connected to the first communication means of the central unit, at least one station (6a-6f, 7a-7d) comprising second frame communication means (13, 14) connected to the communication network, a clock (2) connected to the first communication means of the central unit providing a time information signal (20), and - means (3) of information processing connected to the central unit, device characterized in that the central unit (1) comprises: first means (10) for determining delays, caused by the processing of communication frames comprising time information in the first communication means of the central unit, connected to the clock and to means (8, 8a, 8b) d transmission of the first means of communication from the central, and first correction means (12) connected to the first determination means (10), to means (9, 9a, 9b) for receiving the first communication means, and to information processing means (3) for correcting time information carried by communication frames. Dispositif de communication selon la revendication 1 caractérisé en ce que les moyens (8, 8a, 8b) d'émission des premiers moyens de communication de la centrale fournissent, aux premiers moyens (10) de détermination, un signal (21, 21a, 21b) représentatif de l'émission d'une trame.Communication device according to claim 1 characterized in that the means (8, 8a, 8b) for transmitting the first means of communication from the central station, to the first means (10) for determining, a signal (21, 21a, 21b) representative of the transmission of a frame. Dispositif de communication selon l'une des revendications 1 ou 2 caractérisé en ce que les premiers moyens (12) de correction fournissent aux moyens (3) de traitement d'informations des informations datées en fonction de valeurs d'information horaires fournies par des trames reçues par les moyens (9, 9a, 9b) de réception des premiers moyens de communication augmentées de premières valeurs de retard fournies par les premiers moyens (10) de détermination.Communication device according to either of Claims 1 or 2, characterized in that that the first correction means (12) provide to the processing means (3) information dated information based on hourly information values supplied by frames received by the means (9, 9a, 9b) for receiving the first means communication increased by the first delay values provided by the first means (10) of determination. Dispositif de communication selon l'une quelconque des revendications 1 à 3 caractérisé en ce que la centrale comporte des moyens (11) de mémorisation connectés aux premiers moyens (10) de détermination de retards.Communication device according to any one of Claims 1 to 3 characterized in that the central unit includes storage means (11) connected to the first means (10) for determining delays. Dispositif de communication selon l'une quelconque des revendications 1 à 4 caractérisé en ce que au moins une station comporte : des seconds moyens (15) de détermination de retards, provoqués par les seconds moyens de communication de la station, connectés à des moyens (13) de réception des seconds moyens de communication de la station, et des seconds moyens (16) de correction connectés aux seconds moyens (15) de détermination, aux seconds moyens (13) de réception des seconds moyens de communication de la station, et à des moyens (17) de gestion d'une heure locale de la station. Communication device according to any one of Claims 1 to 4, characterized in that at least one station comprises: second means (15) for determining delays, caused by the second station communication means, connected to means (13) for receiving the second station communication means, and second correction means (16) connected to the second determination means (15), to the second means (13) for receiving the second communication means from the station, and to means (17) for managing a local time of day the station. Dispositif de communication selon la revendication 5 caractérisé en ce que les moyens (13) de réception des seconds moyens de communication de la station fournissent, aux seconds moyens (15) de détermination, un signal (23) représentatif de réception d'une trame.Communication device according to claim 5 characterized in that the means (13) for receiving the second communication means of the station provide, to second means (15) for determining, a signal (23) representative of reception of a frame. Dispositif de communication selon l'une des revendications 5 ou 6 caractérisé en ce que les seconds moyens (16) de correction corrigent des valeurs d'information horaires, de trames fournies par les moyens de réception des seconds moyens de communication, en fonction de secondes valeurs de retard fournies par les seconds moyens de détermination, des valeurs d'information horaires étant augmentées de valeurs représentatives desdites secondes valeurs de retard.Communication device according to one of claims 5 or 6 characterized in that that the second correction means (16) correct hourly information values, frames supplied by the reception means of the second communication means, in function of second delay values supplied by the second determination means, hourly information values being increased by values representative of said hours second delay values. Dispositif de communication selon l'une quelconque des revendications 5 à 7 caractérisé en ce que la station comporte des moyens (18) de traitement fournissant une trame comportant des informations d'événement associées à des informations d'horaire, connectés aux moyens (17) de gestion d'une heure locale, à des moyens (19d, 19e) de détection d'événements et à des moyens (14) d'émission des seconds moyens de communication.Communication device according to any one of Claims 5 to 7 characterized in that the station includes processing means (18) providing a frame comprising event information associated with timetable information, connected to the means (17) for managing a local time, to means (19d, 19th) for detection of events and of means (14) for transmitting the second means of communication. Procédé de communication caractérisé en ce qu'il comporte : une étape (31) de requête d'émission d'une première trame comportant une information horaire, une étape (32) de traitement de l'émission de la première trame, une étape (34) de détermination de la durée de traitement de l'émission de la première trame, une étape (35) de mémorisation de la valeur de la durée de traitement de l'émission de la première trame, une étape (45) de réception d'une seconde trame comportant une seconde information horaire, et une étape (46) de correction de la seconde information horaire en fonction de la valeur de la durée de traitement de l'émission de la première trame. Communication method characterized in that it comprises: a step (31) of requesting transmission of a first frame comprising time information, a step (32) of processing the transmission of the first frame, a step (34) of determining the processing time for the transmission of the first frame, a step (35) of memorizing the value of the duration of processing of the transmission of the first frame, a step (45) of receiving a second frame comprising second time information, and a step (46) of correcting the second time information as a function of the value of the processing time of the transmission of the first frame. Procédé de communication caractérisé en ce qu'il comporte : une étape (36) de détection de réception d'une première trame comportant une information horaire, une étape (37, 38) de traitement de la réception de la première trame, une étape (39) de détermination de la durée de traitement de la réception de la première trame, une étape (40) de correction de la valeur de l'information horaire de la première trame, une étape (41) de chargement de la valeur corrigée, de l'information horaire, dans un gestionnaire d'heure locale, une étape de (42) détection d'événement, une étape (43) de constitution d'une seconde trame comportant une information sur l'événement et une information d'heure locale, et une étape (44) d'émission de la dite seconde trame. Communication method characterized in that it comprises: a step (36) of detecting receipt of a first frame comprising time information, a step (37, 38) of processing the reception of the first frame, a step (39) of determining the processing time of the reception of the first frame, a step (40) of correcting the value of the time information of the first frame, a step (41) of loading the corrected value, of the hourly information, into a local time manager, a step of (42) event detection, a step (43) of constituting a second frame comprising information on the event and local time information, and a step (44) of transmitting said second frame.
EP19970410116 1996-11-05 1997-10-17 Communication means and method allowing a precise timing of an event Expired - Lifetime EP0840185B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9613701A FR2755557B1 (en) 1996-11-05 1996-11-05 COMMUNICATION DEVICE AND METHOD FOR PRECISE DATE OF EVENTS
FR9613701 1996-11-05

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EP0840185B1 EP0840185B1 (en) 2002-04-10

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DE69711806T2 (en) 2002-09-26
EP0840185B1 (en) 2002-04-10
DE69711806D1 (en) 2002-05-16
FR2755557A1 (en) 1998-05-07
FR2755557B1 (en) 1998-12-31

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