CN105485524A - Pipeline leakage detection system and method using negative pressure waves - Google Patents
Pipeline leakage detection system and method using negative pressure waves Download PDFInfo
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- CN105485524A CN105485524A CN201510844277.7A CN201510844277A CN105485524A CN 105485524 A CN105485524 A CN 105485524A CN 201510844277 A CN201510844277 A CN 201510844277A CN 105485524 A CN105485524 A CN 105485524A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
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Abstract
The invention provides a pipeline leakage detection system and method using negative pressure waves, and relates to the field of oil pipeline leakage detection. According to the system and method, time synchronization of pressure data is achieved accurately through pressure sensors, GPS units and data synchronizers which are arranged at all stations of pipelines; a PLC collecting unit transmits pressure data subjected to time synchronization to an SCADA server; the SCADA server assembles the pressure data of all the stations and provides a remote access interface; the data is uploaded to a leakage detection server through the access interface, so that the stability of data transmission is guaranteed, sending of a pressure data read failure is avoided, and the reliability and the accuracy of the pressure data are guaranteed; and finally the leakage detection server finishes judging and matching of the pressure data as well as the detection positioning, leakage detection among multi-station pipelines is achieved, and the accuracy of the final computed result is improved.
Description
Technical field
The present invention relates to petroleum pipeline leakage monitoring field, particularly relate to a kind of suction wave line leakage system and method.
Background technique
The extensive investment construction of the oil and gas pipes brought along with China's rapid economic development, oil and gas pipeline leakage, blocking, defect problem are day by day serious, current oil field at home long distance oil pipeline does not mostly install Leakage Detection system, main by manually making an inspection tour along pipeline, pipeline performance data read by artificial, and this situation is very unfavorable to the safe operation of pipeline.According to estimates, the output value of monitoring leak from oil gas pipe, detection system light product itself just will close to 1, and 00,000,000,000.Over the long term, line leakage industry is except needing more reliable, more effective technological means, product itself to ensure real-time, accuracy, the validity of leakage monitoring, and high position precision and low rate of false alarm etc., more Local Service and analysis experts also needing long-term high-quality.
In view of the foregoing, develop a kind of can on-line checkingi, Realtime Alerts, simple to operate, dispose convenient and there is the line leakage method, system of higher positioning accuracy and low rate of false alarm and method is current problem demanding prompt solution.
Summary of the invention
The object of the invention is the deficiency overcoming prior art existence, thus provides a kind of suction wave line leakage system and method.
In first aspect, the invention provides a kind of suction wave line leakage system.This system comprises is located at each website pressure transducer of pipeline, GPS unit, data synchronizing unit and PLC collecting unit, and SCADA server, leakage monitoring server and the client terminal be located in central control chamber, described pressure transducer and GPS unit are connected with described data synchronizing unit respectively, for gathering pipeline real-time pressure data separately and gps signal is uploaded to described data synchronizing unit, described gps signal comprises calibration pulse signal and standard time information; Described data synchronizing unit is connected with described PLC collecting unit, for receiving gps signal and pressure data, and carries out time synchronization according to calibration pulse signal and standard time information to the pressure data after process after carrying out filtering and conditioning to pressure data; Described PLC collecting unit is connected with described SCADA server, for the pressure data after time synchronization is sent into SCADA server; Described SCADA server is connected with described leakage monitoring server, for receiving the pressure data of each website PLC collecting unit and transferring to described leakage monitoring server; Described leakage monitoring server is connected with described client machines, for receiving the pressure data of each website with analysing and processing, to draw leak condition and the leakage point of pipeline; And described client terminal, for showing to the various data of described leakage monitoring server request.
Further, described SCADA server comprises PLC-Server communication module and OPCClient proxy module,
Described PLC-Server communication module and described PLC collecting unit match, for collecting the pressure data of each website PLC collecting unit and providing OPC remote data access interface;
The pressure data collected is transferred to described leakage monitoring server by OPC remote data access interface by described OPCClient proxy module.
Further, described leakage monitoring server comprises determination module, matching module and leak point positioning module,
Determination module is connected with matching module, for receiving the pressure data of each website with setpoint frequency and the minimum monitoring door limit value preset with corresponding website is compared; When certain website pressure data of monitoring is lower than the minimum monitoring door limit value of its correspondence, then export leakage alarm information, this leakage alarm information comprises site name and leakage monitoring moment t1;
Matching module is connected with leak point positioning module, for searching the leakage alarm information of the leakage alarm information match exported with determination module from leakage alarm history library, the leakage alarm information matched comprises site name and leakage monitoring moment t2, the leakage alarm information that the leakage alarm information matched and determination module export occurs in same pipeline section, and both time differences are less than the time threshold values of pipeline section, described time threshold values be between two websites crow flight distance than upper suction wave along pipe transmmision speed;
Leak point positioning module, the coupling according to composition positions leakage point along pipe transmmision speed crow flight distance, time difference and suction wave between website.
Further, described leak point positioning module adopts ranging formula X=[L-v (t1-t2)]/2, and wherein, L is the crow flight distance between t1 website and t2 website, V be suction wave along pipe transmmision speed, X leaks locating point relative to the distance of t2 website.
Further, described PLC collecting unit adopts Siemens 1500 series Programmable logic Controller (PLC).
Further, described system also comprises switchboard, and it is connected by RJ-45 netting twine with the PLC collecting unit of each website, makes the pressure data of PLC collecting unit collection import Local Area Network and arrives SCADA server.
In second aspect, the invention provides a kind of monitoring method adopting above-mentioned suction wave line leakage system to carry out.The method comprises the following steps:
A, will gather pipeline real-time pressure data separately and gps signal is uploaded to data synchronizing unit respectively by pressure transducer and GPS unit, described gps signal comprises calibration pulse signal and standard time information;
B, receive pressure data and gps signal by data synchronizing unit, and according to calibration pulse signal and standard time information, time synchronization is carried out to the pressure data after process after filtering and conditioning are carried out to pressure data;
C, by PLC collecting unit, the pressure data after time synchronization is sent into SCADA server;
D, receive the pressure data of each website PLC collecting unit by SCADA server and transfer to leakage monitoring server;
E, to be received by leakage monitoring server and the pressure data of each website of analysing and processing, to draw leak condition and the leakage point of pipeline; And
F, by client terminal display leak with locating information and pressure transducer status information.
Further, described steps d specifically comprises the following steps:
G, collect the pressure data of each website PLC collecting unit by the PLC-Server communication module in SCADA server and OPC remote data access interface is provided;
H, by OPC remote data access interface, the pressure data collected is transferred to leakage monitoring server by the OPCClient proxy module in SCADA server.
Further, described step e specifically comprises the following steps:
I, receive the pressure data of each website by the determination module in leakage monitoring server with setpoint frequency and determine whether lower than the preset minimum monitoring door limit value of its corresponding website; If certain website pressure data is lower than the preset minimum monitoring door limit value of its corresponding website, then export leakage alarm information, this leakage alarm information comprises site name and leakage monitoring moment t1, then performs step j; If not, then step I is performed;
J, to be searched from leakage alarm history library by the matching module in leakage monitoring server and whether have and the leakage alarm information of leakage alarm information match that exports in step I, the leakage alarm information matched comprises site name and leakage monitoring moment t2, the leakage alarm information exported in the leakage alarm information matched and step I occurs in same pipeline section, and both time differences are less than the time threshold values of pipeline section, described time threshold values be between two websites crow flight distance than upper suction wave along pipe transmmision speed; If have, then export the leakage alarm information matched, then perform step k; If nothing, then leakage alarm information in step I is stored in alarm history storehouse, then performs step I;
K, crow flight distance, time difference and suction wave between website to be positioned along pipe transmmision speed leakage point according to the coupling formed by the leak point positioning module in leakage monitoring server.
Further, described step k adopts ranging formula X=[L-v (t1-t2)]/2 to realize the location of leakage point,
Wherein, L is the crow flight distance between t1 website and t2 website, V be suction wave along pipe transmmision speed, X leaks locating point relative to the distance of t2 website.
The invention has the beneficial effects as follows: achieve that to carry out precise time to pressure data synchronous by being located at pipeline each website pressure transducer, GPS unit and data synchronizing unit; By PLC collecting unit, the pressure data after time synchronization is transferred to SCADA server, collect all website pressure datas by SCADA server and remote access interface is provided, by access interface by data upload to leakage monitoring server, ensure that the stability of data transmission, avoid the transmission that pressure data reads failed phenomenon, ensure reliability and the accuracy of pressure data; Finally completed by leakage monitoring server pressure data is judged, coupling and leak location, achieve the leakage monitoring of multi-site pipeline enclosure and improve the accuracy of final calculation result.
Accompanying drawing explanation
Fig. 1 is the suction wave line leakage system architecture diagram of the embodiment of the present invention;
Fig. 2 is that the suction wave line leakage system signal of the embodiment of the present invention transmits schematic diagram; And
Fig. 3 is the method flow diagram that the employing suction wave line leakage system of the embodiment of the present invention carries out monitoring.
Embodiment
Technological scheme in the embodiment of the present invention is better understood in order to make those skilled in the art person, and enable the above-mentioned purpose of the embodiment of the present invention, feature and advantage become apparent more, below by drawings and Examples, technological scheme of the present invention is described in further detail.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the suction wave line leakage system architecture diagram of the embodiment of the present invention.
As shown in Figure 1, in the embodiment of the present invention, suction wave line leakage system comprises pressure transducer, GPS unit, data synchronizing unit, PLC collecting unit, switchboard, SCADA server, leakage monitoring server and client terminal.SCADA server comprises PLC-Server communication module and OPCClient proxy module.Leakage monitoring server comprises determination module, matching module and leak point positioning module.
Pressure transducer is connected with data synchronizing unit respectively with GPS unit, and the pipeline real-time pressure data gathered separately and gps signal are uploaded to data synchronizing unit by primary responsibility.Described gps signal comprises calibration pulse signal and standard time information.
Data synchronizing unit is connected with PLC collecting unit, is mainly used to receive gps signal and pressure data, and carries out time synchronization according to calibration pulse signal and standard time information to the pressure data after process after carrying out filtering and conditioning to pressure data.Then the pressure data after time synchronization is transferred to PLC collecting unit by DI Digital Interface (comprising RS232, RS422, RS485, MODBUS etc.).
PLC collecting unit is connected with switchboard by RJ-45 netting twine, is mainly used to receive and send pressure data to switchboard, makes the pressure data of PLC collecting unit collection import Local Area Network arrive SCADA server by switchboard.PLC collecting unit in the present embodiment can adopt Siemens 1500 series Programmable logic Controller (PLC).
SCADA server is connected with leakage monitoring server, and primary responsibility completes sampling and the transmission of data, and pressure data after time synchronizing is transferred to leakage monitoring server.SCADA server can comprise PLC-Server communication module and OPCClient proxy module, PLC-Server communication module and PLC collecting unit match, can collect each website PLC collecting unit synchronously process after pressure data and OPC remote data access interface is provided; The pressure data collected is transferred to leakage monitoring server by OPC remote data access interface by OPCClient proxy module.
Leakage monitoring server is connected with client machines, and the pressure data that primary responsibility receives and analysing and processing SCADA server transmits, to draw leak condition and the leakage point of pipeline.Leakage monitoring server can carry out the reading of pressure data from each website PLC collecting unit with certain reading frequency (as 10HZ), each website plc data block all can arrange a minimum monitoring door limit value K, when in the plc data block (10 groups is 1 piece) of monitoring certain each website, certain data (force value) are lower than K, now system can send leakage alarm, and exports this data leak monitoring moment.Then this leakage information is mated with the leakage information in alarm history storehouse, composition optimum Match to after carry out the location of leakage point again.
Leakage monitoring server can comprise determination module, matching module and leak point positioning module.Determination module is connected with matching module, for receiving the pressure data of each website with setpoint frequency and the minimum monitoring door limit value preset with corresponding website is compared; When certain website pressure data of monitoring is lower than the minimum monitoring door limit value of its correspondence, then export leakage alarm information, this leakage alarm information comprises site name and leakage monitoring moment t1; Matching module is connected with leak point positioning module, for searching the leakage alarm information of the leakage alarm information match exported with determination module from leakage alarm history library, the leakage alarm information matched comprises site name and leakage monitoring moment t2, the leakage alarm information that the leakage alarm information matched and determination module export occurs in same pipeline section, and both time differences are less than the time threshold values of pipeline section, described time threshold values be between two websites crow flight distance than upper suction wave along pipe transmmision speed.Leak point positioning module, the coupling according to composition positions leakage point along pipe transmmision speed crow flight distance, time difference and suction wave between website.Leak point positioning module in the present embodiment adopts ranging formula X=[L-v (t1-t2)]/2, wherein, L is the crow flight distance between t1 website and t2 website, V be suction wave along pipe transmmision speed, X leaks locating point relative to the distance of t2 website.
Client terminal is used for the various data of leakage monitoring server request and shows.Leak and locating information and pressure transducer status information as shown.
It should be noted that, leakage monitoring server does not need the transfer of OPCClient proxy module from the pressure data required for the reading of PLC-Server communication module by OPC interface remote, but there is such problem in OPC (OPC is the general standard interface agreement of technical grade data remote access) interface, remote access (striding equipment) needs to configure DCOM, and stability is inadequate, usually occur that access links disconnects or the disabled state of data remote access.OPCClient proxy module can solve the problem, the embedded OPC data access component of OPCClient proxy module, PLC-Server communication module and OPCClient proxy module are operated on same equipment, so OPC data access belongs to local data access, do like this and do not need to configure DCOM, and stability is higher, substantially there will not be the phenomenon of digital independent failure, ensure reliability and the accuracy of pressure data.OPCClient proxy module possesses adjustment digital independent frequency functionality, it is 10Hz that system default arranges frequency, namely per secondly read 10 groups of data (each PLC collecting unit consistent, each PLC collecting unit 10 groups of data) from PLC-Server communication module and transfer data to leakage monitoring server.Abnormal (sending communication mark and whether judgement symbol connects exception to PLC-Server module) whether OPCClient proxy module also possess certain road of monitoring plc data and to read.
Fig. 2 is that the suction wave line leakage system signal of the embodiment of the present invention transmits schematic diagram.
As shown in Figure 2, in the embodiment of the present invention, at each website (1 to N website of pipeline, N be greater than 1 positive integer) pressure transducer, GPS unit and PLC collecting unit are set respectively, the switchboard arranged in central control chamber, SCADA server, leakage monitoring server and client terminal.The pipeline pressure data of collection and gps signal are sent into the data synchronizing unit on its website by the pressure transducer on described each website and GPS unit respectively, and wherein gps signal comprises calibration pulse signal and standard time information.Receive gps signal and pressure data by data synchronizing unit, and according to calibration pulse signal and standard time information, time synchronization is carried out to the pressure data after process after filtering and conditioning are carried out to pressure data.Then the pressure data after time synchronization is transferred to PLC collecting unit by DI Digital Interface (comprising RS232, RS422, RS485, MODBUS etc.).Pressure data passes on after switchboard and transfers to SCADA server by PLC collecting unit.Transfer to leakage monitoring server after pressure data after collecting all Site synch process by SCADA server, by leakage monitoring server, analysing and processing is carried out to draw the leakage point of pipeline to the pressure data received.
Leakage monitoring server to the processing procedure of pressure data is: when the pressure data of the collection monitoring certain website PLC collecting unit presets minimum threshold values lower than its corresponding website, then export a leakage alarm information, and from leakage alarm history library, search the leakage information with this leakage alarm information match, so-called coupling leakage information refers to that two leakage informations occur in same pipeline section, and both time differences are less than the time threshold values KT (length of pipe section/pressure waveform is along pipe transmmision speed) of pipeline section, and select optimum Match to (such as pipeline has 1, 2, 3, 4 websites, No. 2 and No. 3 websites leak, leakage monitoring server all can monitor leakage alarm information in theory, likely 1 and 2, 2 and 3, 3 and 4 composition couplings are right, but by can determine after coupling screening conditions No. 2 websites and No. 3 websites be optimum Match to), by optimum Match to and utilize ranging formula can calculate leakage locating point, and then the leakage alarm information warehouse-in that will receive.If without coupling leakage information in alarm history storehouse, then can the leakage alarm information that PLC collecting unit exports be stored in alarm history storehouse, reference data during to mate as next leakage alarm information.
In the present embodiment, leakage monitoring server first carries out coupling reveal information to the pressure data received, and then the position of leakage point is calculated according to leakage point formula, adopt the method can not only solve waveform when pipeline generation is leaked to need by the problem effectively detected, could to reach the effect of Quick Catch leakage and real-time location from pipe transmmision certain hour; Can also by leakage with location separate, than if any user only need output leakage information; Pipeline can also be solved when there is multi-site, accurately cannot navigate to the problem of the position of leakage point.
Fig. 3 is the method flow diagram that the employing suction wave line leakage system of the embodiment of the present invention carries out monitoring.
As shown in Figure 3, the method flow diagram that the employing suction wave line leakage system of the embodiment of the present invention carries out monitoring comprises the following steps:
In step 301, will gather pipeline real-time pressure data separately and gps signal is uploaded to data synchronizing unit respectively by pressure transducer and GPS unit, described gps signal comprises calibration pulse signal and standard time information.。
In step 302, by the gps signal in data synchronizing unit receiving step 301 and pressure data, and according to calibration pulse signal and standard time information, time synchronization is carried out to the pressure data after process after filtering and conditioning are carried out to pressure data, then the pressure data after time synchronization is transferred to PLC collecting unit.
In step 303, SCADA server is sent to by the pressure data after time synchronizing in PLC collecting unit receiving step 302.
In step 304, by website PLC collecting unit each in the PLC-Server communication module compilation steps 303 in SCADA server pressure data and OPC remote data access interface is provided.
In step 305, by OPC remote data access interface, the pressure data collected in step 304 is transferred to leakage monitoring server by the OPCClient proxy module in SCADA server.
Within step 306, to be determined whether lower than the preset minimum monitoring door limit value of its corresponding website with the pressure data of website each in setpoint frequency receiving step 305 by the determination module in leakage monitoring server.If so, then step 307 is performed; If not, then step 306 is performed.
In step 307, if certain website pressure data is lower than the preset minimum monitoring door limit value of its corresponding website in step 306, then export leakage alarm information, this leakage alarm information comprises site name and leakage monitoring moment t1, then performs step 308.
In step 308, searched from leakage alarm history library by the matching module in leakage monitoring server and whether have and the leakage alarm information of leakage alarm information match that exports in step 307, the leakage alarm information matched comprises site name and leakage monitoring moment t2, the leakage alarm information exported in the leakage alarm information matched and step 307 occurs in same pipeline section, and both time differences are less than the time threshold values of pipeline section, described time threshold values be between two websites crow flight distance than upper suction wave along pipe transmmision speed.If search, then perform step 309; If not, then step 310 is performed.
In a step 309, if search the leakage alarm information of the leakage alarm information match exported with step 307, then export the leakage alarm information matched, then perform step 311.
In the step 310, if do not search the leakage alarm information of the leakage alarm information match exported with step 307, then leakage alarm information in step 307 is stored in alarm history storehouse, then performs step 306.
In step 311, crow flight distance, time difference and suction wave between website are positioned along pipe transmmision speed leakage point according to the coupling formed by the leak point positioning module in leakage monitoring server.Namely adopt ranging formula X=[L-v (t1-t2)]/2 to realize the location of leakage point, wherein, L is the crow flight distance between t1 website and t2 website, V be suction wave along pipe transmmision speed, X leaks the distance of locating point relative to t2 website.
In step 312, leaked and locating information and sensor status information by client terminal display.
In sum, the invention has the advantages that the waste that can reduce unnecessary manpower and materials, saving resource, and can on-line checkingi, Realtime Alerts, simple to operate, dispose convenient, positioning precision is high and rate of false alarm is low.Achieve that to carry out precise time to pressure data synchronous by being located at each website pressure transducer of pipeline, GPS unit, data synchronizing unit and PLC collecting unit; Collect all website pressure datas by SCADA server and remote access interface is provided, by access interface by data upload to leakage monitoring server, ensure that the stability of data transmission, avoid the transmission that pressure data reads failed phenomenon, ensure reliability and the accuracy of pressure data; Finally completed by leakage monitoring server pressure data is judged, coupling and leak location, achieve the leakage monitoring of multi-site pipeline enclosure and improve the accuracy of final calculation result.
Above-described embodiment; object of the present invention, technological scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a suction wave line leakage system, it is characterized in that, comprise and be located at each website pressure transducer of pipeline, GPS unit, data synchronizing unit and PLC collecting unit, and be located at SCADA server, leakage monitoring server and the client terminal in central control chamber
Described pressure transducer and GPS unit are connected with described data synchronizing unit respectively, and for gathering pipeline real-time pressure data separately and gps signal is uploaded to described data synchronizing unit, described gps signal comprises calibration pulse signal and standard time information;
Described data synchronizing unit is connected with described PLC collecting unit, for receiving gps signal and pressure data, and carries out time synchronization according to calibration pulse signal and standard time information to the pressure data after process after carrying out filtering and conditioning to pressure data;
Described PLC collecting unit is connected with described SCADA server, for the pressure data after time synchronization is sent into SCADA server;
Described SCADA server is connected with described leakage monitoring server, for receiving the pressure data of each website PLC collecting unit and transferring to described leakage monitoring server;
Described leakage monitoring server is connected with described client machines, for receiving the pressure data of each website with analysing and processing, to draw leak condition and the leakage point of pipeline; And
Described client terminal, for showing to the various data of described leakage monitoring server request.
2. suction wave line leakage system according to claim 1, is characterized in that, described SCADA server comprises PLC-Server communication module and OPCClient proxy module,
Described PLC-Server communication module and described PLC collecting unit match, for collecting the pressure data of each website PLC collecting unit and providing OPC remote data access interface;
The pressure data collected is transferred to described leakage monitoring server by OPC remote data access interface by described OPCClient proxy module.
3. suction wave line leakage system according to claim 1, is characterized in that, described leakage monitoring server comprises determination module, matching module and leak point positioning module,
Determination module is connected with matching module, for receiving the pressure data of each website with setpoint frequency and the minimum monitoring door limit value preset with corresponding website is compared; When certain website pressure data of monitoring is lower than the minimum monitoring door limit value of its correspondence, then export leakage alarm information, this leakage alarm information comprises site name and leakage monitoring moment t1;
Matching module is connected with leak point positioning module, for searching the leakage alarm information of the leakage alarm information match exported with determination module from leakage alarm history library, the leakage alarm information matched comprises site name and leakage monitoring moment t2, the leakage alarm information that the leakage alarm information matched and determination module export occurs in same pipeline section, and both time differences are less than the time threshold values of pipeline section, described time threshold values be between two websites crow flight distance than upper suction wave along pipe transmmision speed;
Leak point positioning module, the coupling according to composition positions leakage point along pipe transmmision speed crow flight distance, time difference and suction wave between website.
4. suction wave line leakage system according to claim 3, it is characterized in that, described leak point positioning module adopts ranging formula X=[L-V (t1-t2)]/2, wherein, L is the crow flight distance between t1 website and t2 website, V be suction wave along pipe transmmision speed, X leaks locating point relative to the distance of t2 website.
5. suction wave line leakage system according to claim 1, is characterized in that, described PLC collecting unit adopts Siemens 1500 series Programmable logic Controller (PLC).
6. according to the suction wave line leakage system one of claim 1 to 5 Suo Shu, also comprise switchboard, it is connected by RJ-45 netting twine with the PLC collecting unit of each website, makes the pressure data of PLC collecting unit collection import Local Area Network and arrives SCADA server.
7. the monitoring method adopting suction wave line leakage system according to claim 1 to carry out, is characterized in that, comprise the following steps:
A, will gather pipeline real-time pressure data separately and gps signal is uploaded to data synchronizing unit respectively by pressure transducer and GPS unit, described gps signal comprises calibration pulse signal and standard time information;
B, receive pressure data and gps signal by data synchronizing unit, and according to calibration pulse signal and standard time information, time synchronization is carried out to the pressure data after process after filtering and conditioning are carried out to pressure data;
C, by PLC collecting unit, the pressure data after time synchronization is sent into SCADA server;
D, receive the pressure data of each website PLC collecting unit by SCADA server and transfer to leakage monitoring server;
E, to be received by leakage monitoring server and the pressure data of each website of analysing and processing, to draw leak condition and the leakage point of pipeline; And
F, by client terminal display leak with locating information and pressure transducer status information.
8. monitoring method according to claim 7, is characterized in that, described steps d specifically comprises the following steps:
G, collect the pressure data of each website PLC collecting unit by the PLC-Server communication module in SCADA server and OPC remote data access interface is provided;
H, by OPC remote data access interface, the pressure data collected is transferred to leakage monitoring server by the OPCClient proxy module in SCADA server.
9. monitoring method according to claim 7, is characterized in that, described step e specifically comprises the following steps:
I, receive the pressure data of each website by the determination module in leakage monitoring server with setpoint frequency and determine whether lower than the preset minimum monitoring door limit value of its corresponding website; If certain website pressure data is lower than the preset minimum monitoring door limit value of its corresponding website, then export leakage alarm information, this leakage alarm information comprises site name and leakage monitoring moment t1, then performs step j; If not, then step I is performed;
J, to be searched from leakage alarm history library by the matching module in leakage monitoring server and whether have and the leakage alarm information of leakage alarm information match that exports in step I, the leakage alarm information matched comprises site name and leakage monitoring moment t2, the leakage alarm information exported in the leakage alarm information matched and step I occurs in same pipeline section, and both time differences are less than the time threshold values of pipeline section, described time threshold values be between two websites crow flight distance than upper suction wave along pipe transmmision speed; If have, then export the leakage alarm information matched, then perform step k; If nothing, then leakage alarm information in step I is stored in alarm history storehouse, then performs step I;
K, crow flight distance, time difference and suction wave between website to be positioned along pipe transmmision speed leakage point according to the coupling formed by the leak point positioning module in leakage monitoring server.
10. monitoring method according to claim 7, is characterized in that, described step k adopts ranging formula X=[L-V (t1-t2)]/2 to realize the location of leakage point,
Wherein, L is the crow flight distance between t1 website and t2 website, V be suction wave along pipe transmmision speed, X leaks locating point relative to the distance of t2 website.
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| CN108980631A (en) * | 2018-06-28 | 2018-12-11 | 北京鼎新世纪软件技术有限公司 | A kind of negative pressure wave method pipeline leakage checking system based on in-circuit emulation |
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| CN110469782A (en) * | 2019-07-31 | 2019-11-19 | 中国科学院声学研究所 | A kind of pipe leakage positioning device based on sef-adapting filter |
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