CN1766404A - Automatic monitoring and evaluating system for interference corrosion of embedded metal pipeline - Google Patents
Automatic monitoring and evaluating system for interference corrosion of embedded metal pipeline Download PDFInfo
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- CN1766404A CN1766404A CN 200510047782 CN200510047782A CN1766404A CN 1766404 A CN1766404 A CN 1766404A CN 200510047782 CN200510047782 CN 200510047782 CN 200510047782 A CN200510047782 A CN 200510047782A CN 1766404 A CN1766404 A CN 1766404A
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Abstract
The invention discloses an automatic monitor and estimation system of buried wire interference corrosion, which consists of automatic monitor device of buried wire interference corrosion and special computer system, wherein the monitor system can work independently to accomplish automatic timing staring and measure multiple points synchronously, which collects and records the data to communicate with the special computer to finish setting and reading data; the special computer system analyses and estimates the collected the data, which outputs estimation result through graph, curve and text pattern. The invention monitors the buried wire corrosion condition and provides the analysis and estimation rapidly, which can be used in the interference corrosion monitoring domain of large-scale building such as oil, gas, heating pipe and water supply pipe.
Description
Whether technical field: whether the present invention relates to a kind ofly can exist interference corrosion to carry out automatic monitoring and evaluation system to embedded metal pipeline, especially can being interfered to embedded metal pipeline, corrosion threatens and the degree that threatened by interference corrosion be carried out device for monitoring and dedicated computer system.
Background technique: underground various pipelines are being carried industry and civilian various media, are city survival and development and industrial lifeline, also are the fastest maximum means of transportation.Embedded metal pipeline often takes place because of oil and gas leakage causes fire, blast, intoxication accident.Main cause is corrosion.Various high low pressure electric transmission line, factory, electric railway etc. can produce to embedded metal pipeline and disturb, the corrosion potential (self potential) of embedded metal pipeline is changed: (1) corrosion potential reduces makes metal lose electronics easily, and metal becomes metal ion and dissolves in the soil and produce corrosion; (2) corrosion potential raises and makes metal obtain electronics easily, and metallic material produces hydrogen embrittlement and ruptures; (3) corrosion potential raises and to make metal obtain electronics easily, causes corrosion-inhibiting coating to come off to make because of separating out hydrogen that metal is easier to be corroded.Monitoring instrument major part to buried pipeline is confined to the test of the burn into extent of damage is done at the position that has been corroded in the prior art, and can not make preventative periodic monitoring, particularly can not realize the multiple spot synchro measure and to functions such as the analysis of buried pipeline interference corrosion degree and assessments.
Summary of the invention:, realize on the ground can multiple spot detecting synchronously that under ground piping is subjected to the state of surrounding environment interference corrosion and to the analysis and the assessment of underground pipeline interference corrosion degree in order to ensure underground utility safety, effectively operation.The technical solution used in the present invention is: a kind of automatic monitoring and evaluation of interference corrosion of embedded metal pipeline system that is used for, this system is made of interference corrosion of embedded metal pipeline automated watch-keeping facility and dedicated computer system.This device can work alone, and the startup of realization automatic timing, multiple spot synchro measure, collection and record data reach communicates by letter with dedicated computer system; Communicate by letter with automated watch-keeping facility by dedicated computer system, finish setting and data read automated watch-keeping facility; By dedicated computer system to analysis of data collected, assessment, with the form output assessment result of chart, curve, text, especially realized the degree whether embedded metal pipeline can be interfered the corrosion threat and threatened by interference corrosion is carried out rapid evaluation.Automated watch-keeping facility is a kind of Artificial Intelligence Instrument that can work long hours in the open air, can measure automatically and write down.During each the measurement, earlier these instrument branches are placed on each measuring point along the line of buried pipeline, start, carry out synchro measure and record according to the time unification of setting.After measurement is finished, again these instruments are collected, communicate by letter with dedicated computer system by serial port, dedicated computer system reads out the data of record, and gather storage, and carry out rapid analysis again and handle, provide the result of assessment at last in the mode of curve, form and text.
Automated watch-keeping facility can be monitored simultaneously and be exchanged undesired signal and direct current undesired signal, these two kinds of signals send AD converter to arrive MCU through gathering switching circuit after handling through alternating signal change-over circuit and direct current signal change-over circuit respectively again, and real-time timepiece chip and NVRAM chip are to be articulated on the data/address bus of MCU.MCU has expanded RS 232 serial interface circuits, is used for communicating by letter with dedicated computer system.Described dedicated computer system is made up of PC and written program, it finishes two tasks: (1) is measured: before measuring each monitoring device is carried out the parameter setting, measure the back and read the data that leave monitoring device in the data file mode in by dedicated computer system; (2) assessment: main according to disturbing equivalent voltage and intensity spectrum that data are carried out rapid analysis, assessment, export assessment result.
Characteristics of the present invention: use monitoring device and dedicated computer system, having realized on the ground can multiple spot monitoring out synchronously embedded metal pipeline is subjected to the state that the surrounding environment interference corrosion influences and analysis and appreciation information to the interference corrosion of embedded metal pipeline degree can be provided, for whether reason, the tested pipeline of searching the generation of interference corrosion signal needs to take anti-tampering corrosion measure, takes which type of anti-tampering corrosion measure that reliable scientific basis is provided, to ensure embedded metal pipeline safety, effectively operation.
Monitoring device function advanced person, simple to operate, easy to use has realized unmanned in the measuring phase, saved a large amount of man power and materials.
The present invention can be widely used in the measurement of interference corrosion influences such as petroleum pipeline, hot duct, water supply line, bridge, building owing to have above characteristics.
Description of drawings:
The functional block diagram of Fig. 1 dedicated computer system
Fig. 2 interference corrosion of embedded metal pipeline automated watch-keeping facility theory diagram
Fig. 3 is a signaling conversion circuit among Fig. 2---direct current undesired signal change-over circuit figure
Fig. 4 is a signaling conversion circuit among Fig. 2---interchange undesired signal change-over circuit figure
Embodiment:
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, the automatic monitoring and evaluation of interference corrosion of embedded metal pipeline system is made up of dedicated computer system and automated watch-keeping facility.Automated watch-keeping facility is a kind of monitoring device that can work alone, and realizes that automatic timing starts, and multiple spot synchro measure, collection and record data can be communicated by letter with dedicated computer system; Communicate by letter with automated watch-keeping facility by dedicated computer system, finish setting and data read automated watch-keeping facility; By dedicated computer system to analysis of data collected, assessment, with the form output assessment result of chart, curve, text, especially realized the degree whether embedded metal pipeline can be interfered the corrosion threat and threatened by interference corrosion is carried out rapid evaluation.
Described automated watch-keeping facility can be monitored simultaneously and be exchanged undesired signal and direct current undesired signal, these two kinds of signals send AD converter to arrive MCU through gathering switching circuit after handling through alternating signal change-over circuit and direct current signal change-over circuit respectively again, and real-time timepiece chip and NVRAM chip are to be articulated on the data/address bus of MCU.MCU has expanded a RS232 serial interface circuit, is used for communicating by letter with dedicated computer system.Wherein, the direct current signal change-over circuit, it will convert suitable measuring voltage to from the direct current undesired signal of copper sulfate reference electrode and embedded metal pipeline test pile.R05, R06, R07 form bleeder circuit, C04 bypass High-frequency Interference, and D3, D4 are the amplitude limit devices, the R08 build-out resistor, it sends to the next stage circuit with signal voltage.The monitoring range of direct current undesired signal is-20～+ 20V, measuring accuracy is 0.001V.The alternating signal change-over circuit, it will convert suitable measuring voltage to from the undesired signal that exchanges of copper sulfate reference electrode and embedded metal pipeline test pile; C01 is a partiting dc capacitor, and R01, R02, R03 form bleeder circuit, C02, C03, C05 bypass High-frequency Interference, D1, D2 are the amplitude limit devices, the R04 build-out resistor, AD736 exchanges the real effective change-over circuit, and C06, C07, C08 are the peripheral components of AD736 need of work; Signal voltage is to export from the 6th pin of AD736.The monitoring range that exchanges undesired signal is 0～200V, and measuring accuracy is 0.01V.
Described dedicated computer system is made up of PC and written program, it finishes two tasks: (1) is measured: before measuring each monitoring device is carried out the parameter setting, measure the back and read the data that leave monitoring device in the data file mode in by dedicated computer system; (2) assessment: main according to disturbing equivalent voltage and intensity spectrum that data are carried out rapid analysis, assessment, export assessment result.Wherein,
Parameter is provided with project to be had: instrument number, testDate is measured zero-time, measures duration, measures pile No., metering system, traffic rate.Described assessment is a video data table on the screen of computer, the corrosion potential curve, and the intensity spectrogram, the assessment result text is also used printer prints output data table, corrosion potential curve, intensity spectrogram, assessment result text.Described corrosion potential curve is to draw according to the corresponding time relationship of the synchronous Monitoring Data of multiple spot, produces the important evidence that provides of reason for judging the interference corrosion signal.
Embodiment: the automatic monitoring and evaluation of interference corrosion of embedded metal pipeline system is made up of dedicated computer system and automated watch-keeping facility.Summarize to get up to be divided into:, realize data capture, signal processing and stored record by automated watch-keeping facility--the monitoring device that high-performance low-power-consumption MCU constitutes; Under specific communications protocol, realize the on-line communication of automated watch-keeping facility and dedicated computer system, with parameter setting, data read and the transmission of its realization to instrument; The data processing software of application specific computer system is finished processing, analysis, assessment to institute's image data.
The automated watch-keeping facility of interference corrosion of embedded metal pipeline monitoring and analytical system is to be master element with high-performance low-power-consumption MCU (89S51), is controlling the operation of whole device; The signaling conversion circuit effect is to exchange or the direct current undesired signal is converted to the circuit of measurement voltage signal; In order to monitor simultaneously the AC and DC undesired signal, application is gathered switching circuit and is realized interchange and alternately collection of direct current in device; The effect of A/D convertor circuit is that the signal conversion of will gather becomes digital signal and inputs to MCU, and through preserving after the conversion treatment, A/D converter is selected 4 semi-integral formula chip IC L7035 again; In order to prevent loss of data, with the data that big capacity non-volatile RAM data storage record is gathered, it can preserve data more than 10 years under power-down conditions, and chip is that HONHKONG company produces HK1255, is that a kind of capacity is the NVRAM of 512K; In order to realize the multiple spot synchro measure, adopt real time clock circuit chip DS12C887 to realize that synchronization timing starts; Because this device works long hours in the open air,, be to communicate by letter with dedicated computer system by the RS232 interface circuit with realizing the setting of instrument so do not design keyboard and display unit; The effect of power circuit be the voltage transitions of battery become whole system needed+5V ,-5V voltage, main chip is 7805 and ICL7660.Realize technological scheme of the present invention, at first will carry out communication to dedicated computer system and monitoring device is connected, promptly, every monitoring device is carried out the test parameter setting and determines communications protocol by the user interface of dedicated computer system according to the requirement of testing engineering; The project that is provided with comprises: instrument number, the year, month, day of testDate is measured initial hour, minute, surveys hour, minute, AC and DC information etc.Be provided with in the project at these, testDate, measurement zero-time parameter decision monitoring device start the time of measurement automatically.Every monitoring device that sets is placed on each test pile place along the pipeline branch; The parameter that is provided with according to every monitoring device regularly starts synchronously, realization is monitored synchronously to the interference corrosion signal timing on the pipeline, promptly respectively the AC and DC undesired signal is replaced conversion and measure, and the form of data according to the agreement regulation is stored in the storage with collection, realization timesharing with MCU control AC and DC potential acquisition circuit; In real-time observation process, read the instantaneous acquiring data, and describe at the curve of the enterprising line time-voltage of display screen of monitoring device.
The MCU on the realization monitoring device and the on-line communication of dedicated computer system, realize parameter setting, data transmission to instrument with its: the singlechip serial communication interface that is about on the monitoring device is online through RS-232C communication cable and dedicated computer system, and the data that transmission is gathered arrive dedicated computer system; Dedicated computer system comprises all dedicated computer system needs and the online part of monitoring device with communicating by letter of monitoring device.At first the running parameter of monitoring device need be set by dedicated computer system.Secondly, all data of monitoring device all will be transferred to dedicated computer system, and dedicated computer system data to be processed are all from monitoring device, so communication modes is the key that connects the two.In whole communication process, need to solve both sides' problems such as transmission means, transmission data correctness check.It is full duplex serial port by single-chip microcomputer inside that monitoring device is communicated by letter with dedicated computer system, adopts asynchronous communication means.Because the traffic operation that dedicated computer system and monitoring device carried out is more, both sides must plan common communication protocol for the information implication of understanding data that the other side is transmitted, just only in this way can know the implication that direction one's own side is sent data.Dedicated computer system and monitoring device have only to be followed communication protocol jointly and could realize the correct transmission of data each other.Described communication protocol mainly comprises: online agreement, dedicated computer system require monitoring device to empty data storage area agreement, dedicated computer system to data transmission word agreement, the dedicated computer system of monitoring device to require monitoring device to transmit in real time the communication protocol of the voltage data of monitoring and the clock protocols that dedicated computer system requires to obtain monitoring device to be provided with the word agreement, dedicated computer system of monitoring device.
The data processing software of application specific computer system, finish processing, analysis, assessment to institute's image data: promptly dedicated computer system is handled, is analyzed the data of preserving, simultaneously the situation of buried pipeline interference corrosion is assessed, provided the result with the form of data form and text.The data processing of dedicated computer system comprises that dedicated computer system accepts data that monitoring device transmits and to the conversion of data form and the preserving type of data, monitor, describe analysis, statistics and the printing of data and curves, data in real time.The key technology of software design is to utilize the expert system principle to solve the statistics and the assessment of data, for whether tested pipeline needs to take anti-corrosion measure, takes which type of anti-corrosion measure that reliable scientific basis is provided, to ensure underground utility safety, effectively operation.The following parameter of main foundation that software is handled problems: predetermined parameter in (1) NBS; (2) material of pipeline and size; (3) chemical composition of soil etc.These parameters input to computer with the form of input option, and computer provides the accurate appreciation information to buried pipeline interference corrosion situation in conjunction with survey data and through calculating, statistics and logic judgement, reasoning.Simultaneously, because the corrosion potential curve is to draw according to the corresponding time relationship of the synchronous Monitoring Data of multiple spot, so can judge the source of interference corrosion signal.
Claims (10)
1, is used for the automatic monitoring and evaluation of interference corrosion of embedded metal pipeline system, it comprises: interference corrosion of embedded metal pipeline automated watch-keeping facility and dedicated computer system, it is characterized in that: automated watch-keeping facility is a kind of monitoring device that can work alone, and the startup of realization automatic timing, multiple spot synchro measure, collection and record data reach communicates by letter with dedicated computer system; Communicate by letter with automated watch-keeping facility by dedicated computer system, finish setting and data read automated watch-keeping facility; By dedicated computer system to analysis of data collected, assessment, with the form output assessment result of chart, curve, text, especially realized the degree whether embedded metal pipeline can be interfered the corrosion threat and threatened by interference corrosion is carried out rapid evaluation.
2, the automatic monitoring and evaluation of the interference corrosion of embedded metal pipeline system that is used for according to claim 1, it is characterized in that: described automated watch-keeping facility can be monitored simultaneously and be exchanged undesired signal and direct current undesired signal, these two kinds of signals are respectively through sending AD converter to arrive MCU through gathering switching circuit again after alternating signal change-over circuit and the processing of direct current signal change-over circuit, real-time timepiece chip and NVRAM chip are to be articulated on the data/address bus of MCU, MCU has expanded a RS232 serial interface circuit, is used for communicating by letter with dedicated computer system.
3, the automatic monitoring and evaluation of the interference corrosion of embedded metal pipeline system that is used for according to claim 2, it is characterized in that: described direct current signal change-over circuit, it will convert suitable measuring voltage to from the direct current undesired signal of copper sulfate reference electrode and embedded metal pipeline test pile; R05, R06, R07 form bleeder circuit, C04 bypass High-frequency Interference, and D3, D4 are the amplitude limit devices, the R08 build-out resistor, it sends to the next stage circuit with signal voltage.
4, the automatic monitoring and evaluation of the interference corrosion of embedded metal pipeline system that is used for according to claim 3 is characterized in that: the monitoring range of described direct current undesired signal is-20～+ 20V, measuring accuracy is 0.001V.
5, the automatic monitoring and evaluation of the interference corrosion of embedded metal pipeline system that is used for according to claim 2, it is characterized in that: described alternating signal change-over circuit, it will convert suitable measuring voltage to from the undesired signal that exchanges of copper sulfate reference electrode and embedded metal pipeline test pile; C01 is a partiting dc capacitor, and R01, R02, R03 form bleeder circuit, C02, C03, C05 bypass High-frequency Interference, D1, D2 are the amplitude limit devices, the R04 build-out resistor, AD736 exchanges the real effective change-over circuit, and C06, C07, C08 are the peripheral components of AD736 need of work; Signal voltage is to export from the 6th pin of AD736.
6, the automatic monitoring and evaluation of the interference corrosion of embedded metal pipeline system that is used for according to claim 5, it is characterized in that: the monitoring range of described interchange undesired signal is 0～200V, measuring accuracy is 0.01V
7, according to claims 1 described automatic monitoring and evaluation of interference corrosion of embedded metal pipeline system that is used for, it is characterized in that: described dedicated computer system is made up of PC and written program, be divided into two-part: (1) is measured: before measuring each monitoring device is carried out the parameter setting, measure the back and read the data that leave monitoring device in the data file mode in by dedicated computer system; (2) assessment: main foundation disturbs equivalence corrosion voltage and intensity spectrum that data are carried out rapid analysis, assessment, the output assessment result.
8, the automatic monitoring and evaluation of the interference corrosion of embedded metal pipeline system that is used for according to claim 7, it is characterized in that: described parameter is provided with project to be had: instrument number, testDate, measure zero-time, measure duration, measure pile No., metering system, traffic rate.
9, according to claims 7 described automatic monitoring and evaluation of interference corrosion of embedded metal pipeline systems that are used for, it is characterized in that: described assessment is a video data table on the screen of computer, the corrosion potential curve, the intensity spectrogram, the assessment result text is also used printer prints output data table, the corrosion potential curve, intensity spectrogram, assessment result text.
10, according to claims 9 described automatic monitoring and evaluation of interference corrosion of embedded metal pipeline systems that are used for, it is characterized in that: the corrosion potential curve is to draw according to the corresponding time relationship of the synchronous Monitoring Data of multiple spot, produces the important evidence that provides of reason for judging the interference corrosion signal.
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Cited By (8)
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| CN100449199C (en) * | 2006-08-30 | 2009-01-07 | 姬文超 | Safety early warning system for monitoring corrosion, leakage of pipeline on active service, and control method |
| CN101865817A (en) * | 2010-06-08 | 2010-10-20 | 天津大学 | Sensor and detection method for detecting corrosion of buried metal |
| CN103615662A (en) * | 2013-11-20 | 2014-03-05 | 中国石油天然气集团公司 | Method for determining nearly-neutral pH value stress corrosion cracking sensitive section of pipeline |
| CN107167419A (en) * | 2017-05-26 | 2017-09-15 | 成都润泰茂成科技有限公司 | A kind of buried pipeline external anti-corrosion layer on-line checking assessment system |
| CN107389782A (en) * | 2017-06-29 | 2017-11-24 | 清华大学 | Spiral nonmagnetic matrix high accuracy imaging detection device for the detection of pipeline tiny flaw |
| CN114167255A (en) * | 2021-11-17 | 2022-03-11 | 中车工业研究院有限公司 | Integrated circuit salt spray corrosion reliability test device and control method |
| CN114325469A (en) * | 2021-12-14 | 2022-04-12 | 国网江西省电力有限公司电力科学研究院 | Grounding grid direct current interference corrosion monitoring system |
| CN115219823A (en) * | 2022-07-15 | 2022-10-21 | 北京市燃气集团有限责任公司 | Multi-point synchronous monitoring and analyzing method and device for pipeline interfered by railway dynamic alternating current |
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| CN1003808B (en) * | 1986-04-28 | 1989-04-05 | 厦门大学 | Scanner for testing micro zone corrosion electric potential current density distribution |
| CN1062207A (en) * | 1991-12-26 | 1992-06-24 | 四川久大盐业(集团)公司 | Anti-corrosion electric transmitted-high pressure flow meter |
| NO308630B1 (en) * | 1996-09-19 | 2000-10-02 | Norske Stats Oljeselskap | Pipeline inspection system |
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| CN100449199C (en) * | 2006-08-30 | 2009-01-07 | 姬文超 | Safety early warning system for monitoring corrosion, leakage of pipeline on active service, and control method |
| CN101865817A (en) * | 2010-06-08 | 2010-10-20 | 天津大学 | Sensor and detection method for detecting corrosion of buried metal |
| CN101865817B (en) * | 2010-06-08 | 2011-12-14 | 天津大学 | Sensor and detection method for detecting corrosion of buried metal |
| CN103615662A (en) * | 2013-11-20 | 2014-03-05 | 中国石油天然气集团公司 | Method for determining nearly-neutral pH value stress corrosion cracking sensitive section of pipeline |
| CN103615662B (en) * | 2013-11-20 | 2016-07-06 | 中国石油天然气集团公司 | A kind of method determining pipeline near neutral pH stress corrosion cracking sensitivity section |
| CN107167419A (en) * | 2017-05-26 | 2017-09-15 | 成都润泰茂成科技有限公司 | A kind of buried pipeline external anti-corrosion layer on-line checking assessment system |
| CN107389782A (en) * | 2017-06-29 | 2017-11-24 | 清华大学 | Spiral nonmagnetic matrix high accuracy imaging detection device for the detection of pipeline tiny flaw |
| CN114167255A (en) * | 2021-11-17 | 2022-03-11 | 中车工业研究院有限公司 | Integrated circuit salt spray corrosion reliability test device and control method |
| CN114325469A (en) * | 2021-12-14 | 2022-04-12 | 国网江西省电力有限公司电力科学研究院 | Grounding grid direct current interference corrosion monitoring system |
| CN115219823A (en) * | 2022-07-15 | 2022-10-21 | 北京市燃气集团有限责任公司 | Multi-point synchronous monitoring and analyzing method and device for pipeline interfered by railway dynamic alternating current |
| CN115219823B (en) * | 2022-07-15 | 2024-01-30 | 北京市燃气集团有限责任公司 | Pipeline multipoint synchronous monitoring analysis method and device under railway dynamic alternating current interference |
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