CN1313944C - Intelligent transmitter device with embedded DeviceNet field bus interface - Google Patents
Intelligent transmitter device with embedded DeviceNet field bus interface Download PDFInfo
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- CN1313944C CN1313944C CNB200410067787XA CN200410067787A CN1313944C CN 1313944 C CN1313944 C CN 1313944C CN B200410067787X A CNB200410067787X A CN B200410067787XA CN 200410067787 A CN200410067787 A CN 200410067787A CN 1313944 C CN1313944 C CN 1313944C
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Abstract
The present invention relates to an intelligent transmitter device with embedded Device Net field bus interfaces, which comprises a DSP transmitter circuit and a power circuit, wherein the measured quantity with multiple parameters is converted to high-precision digital quantity and calculated by the DSP transmitter circuit; a 24 volts of power supply of a power supply line (10) of a Device Net field bus (18) is converted to a 5 volts of power supply by the power supply circuit, and the power supply circuit provides DC power supply for each assembly of the transmitter device. The present invention is characterized in that the DSP transmitter circuit is connected with a Device Net bus interface circuit through a high-speed asynchronous serial port (5), and a digital logic circuit is connected with the DSP transmitter circuit and the Device Net bus interface circuit to realize LCD control, place decoding and key logic. The intelligent transmitter device can be accessed to standard Device Net field bus network, and the present invention has the functions of real-time data processing, full-number field bus communication, telemonitoring, configuration, great bus electric power supply, communication interference rejection, etc. The present invention achieves high intellectualization.
Description
Technical field
The present invention relates to a kind of sensor or transmitter, particularly a kind of intelligent transmitter device that embeds the DeviceNet field-bus interface with field-bus interface.
Background technology
In recent years, fieldbus has become the leading system architecture form of industrial process TT﹠C system.Under the bus system structural requirement, industrial process sensor and instrument thereof must realize intellectuality (comprising digitizing and fieldbusization) at the scene.Being to handle core with CPU, is the entity that becomes the sensor and the transmitter that send mode with the digital communication, and Here it is fieldbus intelligent transducer is also referred to as the transmitter of networking.
The fieldbus intelligent transducer requires to have following characteristics: 1. can finish multiple complex calculation by the various application programs in interior dress high-performance processor and the storer; Can carry out different configurations by software; 2. have signal transmission, communication, 3 kinds of functions of power supply power supply, can realize that the transmitter lead of 1 couple of n connects, and realize two-way communication; 3. electronic unit adopts surface mounting technology (SMT), and design alternative special circuit (ASIC) and microprocessor are realized miniaturization and and improved reliability; 4. can carry out real-time diagnosis, fault alarm does not need on-site maintenance and system maintenance.
At present, the HART protocol-intelligent transmitter that most manufacturers adopt is the product of a kind of " transitionality ", though possessed the characteristics of a part of fieldbus intelligent transducer, but process data is still used 4～20mA simulating signal, its carrier wave digital signal can only be carried out limited functions such as equipment control configuration, and does not possess bus-powered ability, and the network size that can set up is less, simple in structure, reliability is relatively poor.
On the other hand, realize that unified, open standard for Fieldbus is users' hope all the time.CAN bus as one of standard for Fieldbus, compare with other buses have the reliability height, cheap advantage, be not limited to automobile industry at present, beginning develops to fields such as engineering industry, mechanical industry, textile industry, farm machinery, robot, numerically-controlled machine, building automatic, Medical Devices, built-in network equipment, housed device and sensors.But, the CAN agreement is a very simple agreement, it has only defined Physical layer and data link layer, as a kind of and incomplete bus bottom communications protocol, the application problem of complexity such as communication needs in addition that definition application layer standard realizes between equipment and the system, this has limited its opening, versatility greatly.
DeviceNet be obtain that CiA supports based on one of complete field bus protocol stipulations of CAN bus protocol standard, also be the bus international standard that IEC announces.It is connected to network with key industry equipment (as: limit switch, photoelectric sensor, valve group, variable frequency drives, mass flow meter etc.), it is a kind of simple Networking Solutions ﹠ provisioned, when providing multiple vendor with the interchangeability between base part, the cost and the time of distribution and mounting industrial automation equipment have been reduced, its direct interconnection has not only been improved the communication of equipment room, and considerable device level diagnostic function is provided simultaneously.
At present, existing multiple bus support aspect intelligent transducer as FF, LonWorks, Profibus etc., but does not still have the intelligent transducer registration in the DeviceNet of ODVA products catalogue.In the patent retrieval at home, the patent of invention that SUPCON technology company limited submitted on August 14th, 2002 " can realize ethernet communication and by the transmitter of redundent power supply of network " (application number: provided a kind of transmitter 01132306.X) with ethernet communication function and bus-powered ability.Utility model patent " main circuit board of Fieldbus Based the temperature/pressure sensor " (application number: 02261659.4) provided a kind of sensor circuit panel assembly that No.711 Inst., China Shiping Heavy Industry Group Corp submitted on November 18th, 2002 with the CAN interface, can realize that the digital signal that will handle well is sent to the function of CAN bus network, but not have the feature of DeviceNet bus.The content that relates to the intelligent transmitter device with DeviceNet fieldbus function is not arranged in the patent documentation of having announced as yet.
Summary of the invention
The object of the present invention is to provide a kind of intelligent transmitter device that can insert the embedding DeviceNet field-bus interface of standard DeviceNet fieldbus networks.
To achieve these goals, the present invention adopts following technical proposals:
A kind of intelligent transmitter device that embeds the DeviceNet field-bus interface comprises:
A DSP transmitter circuit is converted to the high accuracy number amount and handles computing multiparameter is measured;
A power circuit is 5 volts of power supplys with 24 volts of power source conversion of DeviceNet fieldbus power lead, for each assembly of transmitter device provides direct supply;
It is characterized in that: described DSP transmitter circuit connects a DeviceNet bus interface circuit by high-speed asynchronous serial ports, and have a DLC (digital logic circuit) to be connected with the DeviceNet bus interface circuit with the DSP transmitter circuit, realize LCD control, place decoding and button logic.
Above-mentioned DSP transmitter circuit structure is: a signal conditioning circuit interface connects a dsp processor through a multi-channel a/d converter and voltage reference circuit, also has a double-key board to be connected dsp processor with a LCD display; It is measured that multi-channel a/d converter is gathered multiparameter, is converted to 14 high accuracy number amounts, and the synchronous serial interface by dsp processor is sent to dsp processor internal data reservoir, handles computing then.
The intelligent transmitter device of above-mentioned embedding DeviceNet field-bus interface, the structure that it is characterized in that the DeviceNet bus interface circuit is: the microprocessor by high-speed asynchronous serial ports connection dsp processor connects a DeviceNet module and state bi-colour LED circuit, a watchdog chip, a static data reservoir and a non-volatile electrically erasable data reservoir, and is connected the order wire of DeviceNet fieldbus with the CAV transceiver by a CAN controllers; Microprocessor is realized DeviceNet application layer stipulations, and CAN controller and CAN transceiver are realized Physical layer and data link layer stipulations.
The structure of above-mentioned DLC (digital logic circuit) is: a programmable logic device (PLD) chip is connected with dsp processor, microprocessor, double-key board, LCD display, static data reservoir and CAN controller respectively.
24 volts of power supplys of the power lead of above-mentioned DeviceNet fieldbus are the internal digital circuit supply through 5 volts of power supplys of an integrated regulated power supply module output, and it is multi-channel a/d converter and voltage reference circuit and the power supply of signal conditioning circuit interface that another road enters a DC/DC isolation modular converter.
The present invention has realized having the intelligent transmitter device of the embedding DeviceNet communication function of bus-powered ability.Its outstanding advantage and effect are: (1), dsp processor is applied to in-situ transducer, utilize the powerful signal processing function of DSP to carry out the compensation of filtering, interference, non-linear correction etc., make transmitter have very high real time data processing ability, for intellectuality highly provides support; (2), embed integrated DeviceNet communication function, make transmitter have advanced digital field bus communication ability, functions such as remote monitoring, configuration; (3), owing to adopt the DeviceNet bus standard, utilize the DeviceNet bus cable for sensor, modulate circuit, signal processing circuit, DeviceNet bus communication interface circuit provide power supply, make the industry spot transmitter no longer include the restriction of power consumption and outstanding communication antijamming capability.
Description of drawings
Fig. 1 is the hardware configuration synoptic diagram of the embodiment of the invention.
Fig. 2 is the power unit circuit theory diagrams of the embodiment of the invention.
Fig. 3 is the main circuit diagram of the embodiment of the invention.
Specific implementation method
Below in conjunction with accompanying drawing a preferred embodiment of the present invention is elaborated:
Referring to Fig. 1, the intelligent transmitter device with DeviceNet field-bus interface of present embodiment comprises DSP transmitter circuit, DeviceNet bus interface circuit and DLC (digital logic circuit) and power circuit.
Described DSP transmitter circuit comprises: signal conditioning circuit interface 1, multi-channel a/d converter and voltage reference circuit 2 thereof, dsp processor 3, double-key board 11 and LCD display 12.Multi-channel A/D conversion chip is collecting temperature, static pressure, differential pressure signal simultaneously, be converted to 14 high accuracy number amounts, synchronous serial interface by dsp chip is sent to DSP internal data reservoir, adopt digital signal processing method then, through certain data anastomosing algorithm, in conjunction with the configuration parameters of setting, obtain required static pressure, differential pressure value, flow value or (with) level value, density value etc.Double-key board 11 constitutes man-machine interface on the spot with the form and the lattice type LCD of singly-bound and Macintosh.Display interface is running status explicit user selected or show a plurality of result parameters by turns; Show configurable parameter at configuration status with menu-style.Relate to the baud rate of DeviceNet and tributary address by button software set in configuration menu.The shutoff of DeviceNet network is carried out can relevant configuration information changes in the button menu time automatically with resetting.
Described DeviceNet bus interface circuit comprises: microprocessor 6, data storage 15, non-volatile electrically erasable data reservoir 16, watchdog chip 19, CAN controllers 7, DeviceNet module and state bi-colour LED 14, CAN transceiver 17.Microprocessor 6 is realized DeviceNet application layer stipulations, and CAN controllers 7 that is connected with microprocessor 6 and CAN transceiver 17 are realized Physical layer and data link layer stipulations.Dsp processor 3 is delivered to microprocessor 6 by full-duplex high-speed asynchronous serial port 5 with the process real time data, constitutes the I/O data of DeviceNet; Microprocessor 6 receives the configuration configuration parameter from host computer (or main website) that sends by the explicit newspaper of DeviceNet, and they are sent to dsp processor 3 by serial ports.
Described DLC (digital logic circuit) is realized by programmable logic device (PLD) chip 13, be connected with dsp processor 3, microprocessor 6, double-key board 11, LCD display 12, static data reservoir 15, CAN controller 7 respectively, realize LCD control, address decoding, button logic etc.
Described power circuit is isolated modular converter 4 by integrated regulated power supply module 8 and DC/DC and is constituted.Power devices at first enters integrated regulated power supply module 8 from the 24V of DeviceNet fieldbus 18 power lead 10, and output 5V power supply is the internal digital circuit supply; Another road enters DC/DC isolation modular converter 4 and is multi-channel a/d converter and voltage reference circuit 2 and 1 power supply of signal conditioning circuit interface.
Communication between above-mentioned DSP transmitter circuit and the DeviceNet bus interface circuit connects by high-speed asynchronous serial ports 5, and its communication function is characterized as: (1), bi-directional full-duplex data communication; (2), communication frames is divided into Frame and information frame two classes, Frame comprises the I/O data of DeviceNet about the transmitter applications object instance, and device parameter, DeviceNet network node parameter, DSP that information frame comprises the setting of man-machine interface on the spot show the supplemental characteristic of reporting to the control information and the support of DeviceNet network.
Referring to Fig. 3 DSP transmitter circuit part (dotted line Lower Half).Dsp processor 3 adopts the TMS320F206 of TI companies, and AD converter part 2 is selected 14 the four-way AD conversion chip TLC3544 and the precise reference voltage pio chip MAX875 of TI company for use; LCD display 12 is selected 8 * 2 character point configuration display screens of band HD44780 controller for use; Double-key board 11 is connected with dsp processor by programmable logic device (PLD) 13 shown in Figure 3.
The pin one, 2,3,5 of AD converter part TLC3544 is connected with high-speed synchronous serial port pin 84-CLKR, 85-FSR, 90-DX, the 86-DR of dsp processor 3 respectively, wherein 84 and 87,85 and 89 signal short circuits; The look-at-me line 4 of TLC3544 is connected to interruption 2 pin ones 9 of dsp processor 3 by pull-up resistor R8, utilizes down trigger to notify the DSP analog to digital conversion to finish, and data are ready.A/D change used analog power from the 0V output pin 5 of the DC/DC converter U19 of accompanying drawing 2 power circuits 4 and-5V output pin 7; Its analog references power supply is connected to the output pin 6 of MAX875.The voltage input pin of MAX875 be connected to accompanying drawing 2 power circuits 4 DC/DC converter U19+5V output pin 6.
The data line 7～14 of LCD interface is connected to the I/O mouth pin two 2～31 of dsp processor 3; Control signal RS is connected to I/O mouth 32 pin; Read-write R/W is connected to 47 pin; Enable Pin E is connected to 13 pin of Fig. 3 programmable logic device (PLD) 13, and this signal is produced by the input signal pin 3,4,5 of programmable logic device (PLD) 13; Pin one 5,16 is a power supply; 2 pin are that backlight illumination is regulated input.
The pin 76～82 of TMS320F206 is the jtag interface of dsp processor 3, is connected to port J2, is used for carrying out the debugging of burning program and online programming.
Referring to Fig. 3, DeviceNet bus interface circuit (the dotted line first half), microprocessor 6 is selected the W78E58B of Winbond for use, has the 32K program storage, uses the 24MHz crystal oscillator; Data storage circuit 15 is made up of 74HC373 and 32KRAM high speed reservoir, and CAN controller 7 is selected the SJA1000T of PHILIPS for use, selects crystal oscillator 16MHz for use; CAN transceiver 17 is selected the TJAi050T of PHILIPS for use, and watchdog circuit 19 is selected the MAX813 chip for use; Non-volatile electrically erasable data reservoir 16 is selected the AT93C66 of Atmel for use, and its CS, SK, DI/O pin link to each other with the P1.5 P1.6 P1.7 port of microprocessor 6 respectively, have 512 eight bit words, are used for preserving node configuration information; Programmable logic device (PLD) 13 is selected the GAL16V8D of Lattice for use, the function of completion logic decoding.
Asynchronous serial port 11,13 pin of microprocessor 6 and 93,95 pin of dsp processor 3 connect and compose two cpu data interchange channels; U5 is connected by the parallel port with the CAN controller.The chip select pin 4 of U5 is connected with programmable logic device (PLD) 13 decoding output pins 12, and the reset signal pin is connected with 2 pin of microprocessor 6.The output of U5 is connected to the input of U15, is connected to DeviceNet bus interface J2 then, and J2 selects the Sealed Mini joint in the DeviceNet stipulations for use.
Referring to Fig. 2, the power circuit part mainly selects for use the positive and negative 5V pio chip of the DCP010505DP U19 of LM2576 integrated stable voltage circuit U18 and accessory circuit and DC/DC insulating power supply BB company to form.Power circuit provides 24V power supply by 1,5 pin of bus contact J2.Triode Q1 (2N391) and diode D4 (1N5819) form anti-connect anti-and disconnection protection circuit.U18 integrated regulated power supply module and C19, L1, D5, C20 provide the power supply capacity of output 5V, 3A, and L2 and C21 form filtering circuit.U19 direct supply isolation module output+/-5V, with its-5V output pin 7 is as simulation ground, obtain to be output as+the simulation power pin 5 of 5V reaches+the voltage reference module input pin 6 of 10V.
Claims (5)
1. intelligent transmitter device that embeds the DeviceNet field-bus interface comprises:
A DSP transmitter circuit is converted to the high accuracy number amount and handles computing multiparameter is measured;
A power circuit is 5 volts of power supplys with 24 volts of power source conversion of DeviceNet fieldbus (18) power lead (10), for each assembly of transmitter device provides direct supply;
It is characterized in that: described DSP transmitter circuit connects a DeviceNet bus interface circuit by high-speed asynchronous serial ports (5), and have a DLC (digital logic circuit) to be connected with the DeviceNet bus interface circuit with the DSP transmitter circuit, realize LCD control, place decoding and button logic.
2. the intelligent transmitter device of embedding DeviceNet field-bus interface according to claim 1, it is characterized in that DSP transmitter circuit structure is: a signal conditioning circuit interface (1) connects a dsp processor (3) through a multi-channel a/d converter and voltage reference circuit (2), also has a double-key board (11) to be connected dsp processor (3) with a LCD display (12); It is measured that multi-channel a/d converter is gathered multiparameter, is converted to 14 high accuracy number amounts, and the synchronous serial interface by dsp processor (3) is sent to dsp processor (3) internal data reservoir, handles computing then.
3. the intelligent transmitter device of embedding DeviceNet field-bus interface according to claim 1 and 2, the structure that it is characterized in that the DeviceNet bus interface circuit is: a DeviceNet module of microprocessor (6) connection and a state bi-colour LED circuit (14) that connects dsp processor (3) by high-speed asynchronous serial ports (5), a watchdog chip (19), a static data reservoir (15) and a non-volatile electrically erasable data reservoir (16), and pass through a CAN controllers (7) is connected DeviceNet fieldbus (18) with CAV transceiver (17) order wire (9); Microprocessor (6) is realized DeviceNet application layer stipulations, and CAN controller (7) and CAN transceiver (17) are realized Physical layer and data link layer stipulations.
4. the intelligent transmitter device of embedding DeviceNet field-bus interface according to claim 3, it is characterized in that the structure of DLC (digital logic circuit) is: a programmable logic device (PLD) chip (13) is connected with dsp processor (3), microprocessor (6), double-key board (11), LCD display (12), static data reservoir (15) and CAN controller (7) respectively.
5. the intelligent transmitter device of embedding DeviceNet field-bus interface according to claim 3, the structure that it is characterized in that power circuit is: 24 volts of power supplys of the power lead (10) of DeviceNet fieldbus (18) are the internal digital circuit supply through 5 volts of power supplys of an integrated regulated power supply module (8) output, and another road enters a DC/DC isolation modular converter (4) and is multi-channel a/d converter and voltage reference circuit (2) and signal conditioning circuit interface (1) power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410067787XA CN1313944C (en) | 2004-11-03 | 2004-11-03 | Intelligent transmitter device with embedded DeviceNet field bus interface |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200410067787XA CN1313944C (en) | 2004-11-03 | 2004-11-03 | Intelligent transmitter device with embedded DeviceNet field bus interface |
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| CN1603753A CN1603753A (en) | 2005-04-06 |
| CN1313944C true CN1313944C (en) | 2007-05-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107576689A (en) * | 2017-10-09 | 2018-01-12 | 广州海豹光电科技有限公司 | A kind of Simple calibration method for pH value transmitter |
| CN107894598B (en) * | 2017-12-25 | 2024-01-26 | 天津七六四通信导航技术有限公司 | Universal four-channel digital anti-interference baseband circuit and implementation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1593762A (en) * | 1978-01-18 | 1981-07-22 | Secr Defence | Transceiver circuits |
| US6013108A (en) * | 1997-03-18 | 2000-01-11 | Endevco Corporation | Intelligent sensor system with network bus |
| US20020099465A1 (en) * | 2001-01-19 | 2002-07-25 | Allen Su | Methods and apparatus for facilitating communication between devices via an industrial network |
| CN1364013A (en) * | 2001-11-22 | 2002-08-14 | 浙江浙大中控技术有限公司 | Transducer able to implement Ethernet communication and with redundent power supply provided by network |
| CN2582057Y (en) * | 2002-11-18 | 2003-10-22 | 中国船舶重工集团公司第七一一研究所 | Main circuit board based on field bus for temp/pressure sensor |
-
2004
- 2004-11-03 CN CNB200410067787XA patent/CN1313944C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1593762A (en) * | 1978-01-18 | 1981-07-22 | Secr Defence | Transceiver circuits |
| US6013108A (en) * | 1997-03-18 | 2000-01-11 | Endevco Corporation | Intelligent sensor system with network bus |
| US20020099465A1 (en) * | 2001-01-19 | 2002-07-25 | Allen Su | Methods and apparatus for facilitating communication between devices via an industrial network |
| CN1364013A (en) * | 2001-11-22 | 2002-08-14 | 浙江浙大中控技术有限公司 | Transducer able to implement Ethernet communication and with redundent power supply provided by network |
| CN2582057Y (en) * | 2002-11-18 | 2003-10-22 | 中国船舶重工集团公司第七一一研究所 | Main circuit board based on field bus for temp/pressure sensor |
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