CN203375178U - Urban gas pipe network leakage wireless monitoring system based on acoustic emission - Google Patents

Urban gas pipe network leakage wireless monitoring system based on acoustic emission Download PDF

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Publication number
CN203375178U
CN203375178U CN201320407279.6U CN201320407279U CN203375178U CN 203375178 U CN203375178 U CN 203375178U CN 201320407279 U CN201320407279 U CN 201320407279U CN 203375178 U CN203375178 U CN 203375178U
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China
Prior art keywords
zigbee
leakage
network
pipeline
city
Prior art date
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CN201320407279.6U
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Chinese (zh)
Inventor
陈先锋
刘杰
张英
王海燕
李黎兵
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武汉理工大学
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Priority to CN201320407279.6U priority Critical patent/CN203375178U/en
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Publication of CN203375178U publication Critical patent/CN203375178U/en

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Abstract

The utility model relates to an urban gas pipe network leakage wireless monitoring system based on acoustic emission. The system comprises a pipeline leakage monitoring unit, a Zigbee center node, a GPRS data receiving terminal and a computer control system, wherein the pipeline leakage monitoring unit is used for detecting gas leakage signals in an urban gas pipe network. The Zigbee center node receives the gas leakage signals through a Zigbee wireless network and sends the signals through a GPRS wireless network. The GPRS data receiving terminal receives the signals sent by the Zigbee center node and then sends the signals to the computer control system, and then the gas leakage positions are acquired. According to the urban gas pipe network leakage wireless monitoring system, the urban gas pipe network can be continuously monitored in real time, the pipeline operating state can be comprehensively and systematically controlled, and monitoring efficiency is improved. The Zigbee wireless network and the GPRS wireless network are utilized to transmit signals, and the urban gas pipe network leakage wireless monitoring system has the advantages of being large in transmission distance, flexible to deploy and easy to maintain.

Description

Pipeline network of fuel gas in city based on acoustic emission leaks wireless monitor system
Technical field
The utility model relates to the gas leakage monitoring, refers to that particularly a kind of pipeline network of fuel gas in city based on acoustic emission leaks wireless monitor system.
Background technique
In recent years, along with the fast development of China's economy, people's living environment and living condition are constantly improved, and city residential construction presents inundant situation, has promoted the development of gas auxiliary facility.Combustion gas is with its environmental protection, economical and practical, and characteristics become rapidly city dweller and industrial main fuel safely and reliably.Due to, it is underground that pipeline network of fuel gas in city is embedded in the intensive living area of personnel, once leak, the serious accident of will initiation fire even exploding, the environment that the serious consequence of bringing causes and social concern, considerably beyond accident itself, have a strong impact on and are restricting process of modernization and municipal public safety.
At present, due to the leakage situation complexity of gas pipeline, detection mode is main mainly with artificial regular visit greatly, and the real-time of Leak testtion and location and accuracy are difficult to be guaranteed.
Therefore, design the artificial regular visit of a kind of replacement, can be real-time, efficient and accurate pipeline network of fuel gas in city leakage monitoring system city dweller's the security of the lives and property and the healthy and stable development in city are of great immediate significance.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of manual inspection in above-mentioned prior art and provides a kind of pipeline network of fuel gas in city based on acoustic emission to leak wireless monitor system, this wireless monitor system gathers the pipeline data in pipeline network of fuel gas in city, be sent to remote control center by Zigbee and GPRS wireless networking, to realize the Real-Time Monitoring to whole pipeline network of fuel gas in city.
Realize that the technological scheme that the utility model purpose adopts is: a kind of pipeline network of fuel gas in city based on acoustic emission leaks wireless monitor system, comprising:
The line leakage unit that at least one contains geographic information, be located on the pipeline in pipeline network of fuel gas in city, for detection of the combustion gas signal leaked in pipeline network of fuel gas in city, and sends the information that contains gas leakage by the Zigbee wireless network;
The Zigbee Centroid, be connected in described Zigbee wireless network, for receiving the information of described Zigbee wireless network gas leakage, and this information exchange crossed to the GPRS wireless network and send;
The GPRS data receiving terminal, be connected in described GPRS wireless network the information of sending for receiving described Zigbee Centroid;
Computer controlled system, be connected with described GPRS data receiving terminal, processes the information data received, and obtains the position of gas leakage.
In technique scheme, described line leakage unit comprises:
Calibrate AE sensor, be located on the pipeline in pipeline network of fuel gas in city, for detection of the combustion gas signal leaked in pipeline network of fuel gas in city; And
Analogue signal/Zigbee switching emission module, be connected with described calibrate AE sensor, is converted to the information that contains gas leakage that meets the Zigbee host-host protocol for the combustion gas signal by described leakage, and sends this information.
Further, the described pipeline network of fuel gas in city based on acoustic emission leaks wireless monitor system, also comprises:
Amplifier, be connected between described calibrate AE sensor and analogue signal/Zigbee switching emission module.
In technique scheme, described Zigbee Centroid comprises:
The Zigbee wireless communication module, be connected in described Zigbee wireless network, for receiving the information that contains gas leakage that analogue signal/the Zigbee conversion is sent; And
The Zigbee/GPRS modular converter, be connected with described Zigbee wireless communication module, for the described information that contains gas leakage is converted to the data that meet the GPRS host-host protocol, and launches described data.
The utility model is monitored the pipeline in pipeline network of fuel gas in city by calibrate AE sensor, once monitor pipeline, the signal leaked appears, signal is sent by the Zigbee wireless network after by analogue signal/Zigbee switching emission module converts, in Zigbee Centroid reception Zigbee wireless network, after signal, by the conversion of Zigbee/GPRS modular converter, by the GPRS wireless network, send; The GPRS data receiving terminal is transferred to computer controlled system after receiving the signal in the GPRS wireless network, and computer controlled system obtains the accurate location leaked after to signal analysis and processing.
The accompanying drawing explanation
Fig. 1 is the structured flowchart that the pipeline network of fuel gas in city of the utility model based on acoustic emission leaks wireless monitor system;
Fig. 2 is the structural representation that the pipeline network of fuel gas in city of the utility model based on acoustic emission leaks wireless monitor system.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As depicted in figs. 1 and 2, the pipeline network of fuel gas in city of the utility model based on acoustic emission leaks wireless monitor system, comprising: line leakage unit 100, Zigbee Centroid 200, GPRS data receiving terminal 300 and computer controlled system 400.
Wherein, line leakage unit 100 comprises: calibrate AE sensor 101, amplifier 102 and analogue signal/Zigbee switching emission module 103, calibrate AE sensor 101 is located in the pipeline 500 in pipeline network of fuel gas in city, for detection of the combustion gas signal leaked in pipeline network of fuel gas in city.Because the voltage of the signal of calibrate AE sensor 101 output is lower, if the transmission through long distance, signal to noise ratio will reduce, may cause monitor signal to be lost, therefore the present embodiment arranges amplifier 102 at calibrate AE sensor 101 output terminals, emission sensor 101 gathers the combustion gas signal leaked and be input to analogue signal/Zigbee switching emission module 103 after amplifier 102, analogue signal/Zigbee switching emission module 103 is converted to by the combustion gas signal of leakage the digital signal that meets the Zigbee host-host protocol, and by the digital signal after Zigbee wireless network emission conversion.
Acoustic emission is a kind of common physical phenomenon, when material is subject to external force or endogenetic process, deforms or ruptures, and the phenomenon that discharges the ess-strain energy with the elastic wave form is called acoustic emission (Acoustic Emission is called for short AE).Acoustic emission technique is a kind ofly with instrument, to detect, record, analyze acoustic emission signal and utilize acoustic emission signal to infer the technology of acoustic emission source.It can be detected in member or right internal structure, defect or the latent defect process in motion change of material.Its main feature is to carry out real-time dynamic analysis to the fatigue process of material, and the structural integrity of detection of dynamic/monitoring and evaluation member.In the utility model, when a certain position of pipeline 500, leak, will produce corresponding acoustic emission signal, the calibrate AE sensor 100 in the leakage point two ends will collect this class signal.
In the present embodiment, line leakage unit 100 is a plurality of, and the quantity of Zigbee Centroid 200 arranges according to quantity and the position of line leakage unit 100.As: length is about the pipeline 500 of 2km, with spacing 500m, buries 4 line leakage unit 100 underground, sets up a Zigbee Centroid 200 in the central position of pipeline 500.
Zigbee Centroid 200 is connected in the Zigbee wireless network, for receiving the information of Zigbee wireless network gas leakage.In the present embodiment, Zigbee Centroid 200 comprises: Zigbee wireless communication module 201 and Zigbee/GPRS modular converter, wherein Zigbee wireless communication module 201 is connected in the Zigbee wireless network, receives the information of gas leakage in the Zigbee wireless network; Zigbee/GPRS modular converter 202 is connected with Zigbee wireless communication module 201, is converted to the data that meet the GPRS host-host protocol for the information that Zigbee wireless communication module 201 is received, and sends described data by the GPRS wireless network.
GPRS data receiving terminal 300 receives by the GPRS wireless network signal that Zigbee/GPRS modular converter 202 sends;
Computer controlled system 400 is connected with GPRS data receiving terminal 300, receive and process the signal that Zigbee/GPRS modular converter 202 sends, software program in computer controlled system 400 first carries out digital filtering to signal, noise reduction, then to the signal time and frequency domain analysis, by the crosscorrelation location algorithm of setting, leak position is positioned, finally accurate positioning result is presented on the piping drawing of small scale, so that the staff finds location of leak to take effective emergency measures intuitively, rapidly.
The utility model obtains the leakage point position in pipeline 500 in the following manner, if A, B Check point are separately installed with calibrate AE sensor A and B, suppose that source of leaks is between two calibrate AE sensors, after leaking generation, acoustic emission wave is to A, 2 propagation of B, and leakage point can pass through formula (1) to the distance of calibrate AE sensor A and calculate.
x=(D-vΔt)/2??????????????????????(1)
In formula:
X: leakage point is to the distance of sensors A.
D: the distance between two sensors.
V: the velocity of propagation of sound wave in this leakage pipe obtained by project handbook usually.
Δ t: signal propagates into the time difference of sensors A and B.
The utility model can carry out continuous real-time monitoring to pipeline network of fuel gas in city, and comprehensive and systematic control conduit running situation improves monitoring efficiency.The calibrate AE sensor 100 adopted is highly sensitive, and tested pipeline is approached less demanding, and transmission means adopts Zigbee wireless network and GPRS wireless network, and long transmission distance is disposed flexibly, is easy to safeguard.

Claims (4)

1. the pipeline network of fuel gas in city based on acoustic emission leaks wireless monitor system, it is characterized in that, comprising:
The line leakage unit that at least one contains geographic information, be located at respectively on the pipeline in pipeline network of fuel gas in city, for detection of the combustion gas signal leaked in pipeline network of fuel gas in city, and sends the information that contains gas leakage by the Zigbee wireless network;
The Zigbee Centroid, be connected in described Zigbee wireless network, for receiving the information of described Zigbee wireless network gas leakage, and this information exchange crossed to the GPRS wireless network and send;
The GPRS data receiving terminal, be connected in described GPRS wireless network the information of sending for receiving described Zigbee Centroid;
Computer controlled system, be connected with described GPRS data receiving terminal, processes the information data received, and obtains the position of gas leakage.
2. the pipeline network of fuel gas in city based on acoustic emission leaks wireless monitor system according to claim 1, it is characterized in that, described line leakage unit comprises:
Calibrate AE sensor, be located on the pipeline in pipeline network of fuel gas in city, for detection of the combustion gas signal leaked in pipeline network of fuel gas in city; And
Analogue signal/Zigbee switching emission module, be connected with described calibrate AE sensor, is converted to the information that contains gas leakage that meets the Zigbee host-host protocol for the combustion gas signal by described leakage, and sends this information.
3. the pipeline network of fuel gas in city based on acoustic emission leaks wireless monitor system according to claim 2, it is characterized in that, also comprises:
Amplifier, be connected between described calibrate AE sensor and described analogue signal/Zigbee switching emission module.
4. leak wireless monitor system according to claim 1 or the 2 or 3 described pipeline network of fuel gas in city based on acoustic emission, it is characterized in that, described Zigbee Centroid comprises:
The Zigbee wireless communication module, be connected in described Zigbee wireless network, for receiving the information that contains gas leakage that analogue signal/the Zigbee conversion is sent; And
The Zigbee/GPRS modular converter, be connected with described Zigbee wireless communication module, for the described information that contains gas leakage is converted to the data that meet the GPRS host-host protocol, and launches described data.
CN201320407279.6U 2013-07-10 2013-07-10 Urban gas pipe network leakage wireless monitoring system based on acoustic emission CN203375178U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103883884A (en) * 2014-04-04 2014-06-25 济南市长清计算机应用公司 Urban gas underground pipeline safety monitoring system
CN104747912A (en) * 2015-04-23 2015-07-01 重庆邮电大学 Fluid conveying pipe leakage acoustic emission time-frequency positioning method
CN104820950A (en) * 2015-05-04 2015-08-05 清华大学深圳研究生院 Wireless monitoring system of urban water pipe network
CN105020591A (en) * 2015-06-17 2015-11-04 常州大学 Leakage detecting and positioning method for urban gas pipeline without excavation
CN107120535A (en) * 2017-06-06 2017-09-01 北京市燃气集团有限责任公司 The Acoustic Emission location method of the steel gas pipe underground leakage point positioned based on the Big Dipper

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103883884A (en) * 2014-04-04 2014-06-25 济南市长清计算机应用公司 Urban gas underground pipeline safety monitoring system
CN103883884B (en) * 2014-04-04 2016-03-30 济南市长清计算机应用公司 Gas safety of underground pipeline monitoring system
CN104747912A (en) * 2015-04-23 2015-07-01 重庆邮电大学 Fluid conveying pipe leakage acoustic emission time-frequency positioning method
CN104820950A (en) * 2015-05-04 2015-08-05 清华大学深圳研究生院 Wireless monitoring system of urban water pipe network
CN105020591A (en) * 2015-06-17 2015-11-04 常州大学 Leakage detecting and positioning method for urban gas pipeline without excavation
CN105020591B (en) * 2015-06-17 2018-01-02 常州大学 A kind of city gas pipeline does not excavate leakage detecting and locating method
CN107120535A (en) * 2017-06-06 2017-09-01 北京市燃气集团有限责任公司 The Acoustic Emission location method of the steel gas pipe underground leakage point positioned based on the Big Dipper

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