CN102032447A - System for monitoring urban gas pipeline in real time and using method thereof - Google Patents
System for monitoring urban gas pipeline in real time and using method thereof Download PDFInfo
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Abstract
The invention discloses a system for monitoring leakage of a gas pipeline and a using method thereof, wherein the system comprises: the system comprises an infrasonic wave sensor, an auxiliary sensor, a data processor, a GPS time sequence unit, a control center computer and the like. The infrasonic wave monitoring device is installed at a city pipe network node, receives the leakage condition of a city gas pipeline in real time, and transmits data to a control center through a GPS (global positioning system), so that the monitoring and management of the gas pipeline are realized, and the purposes of real-time monitoring and accurate positioning are achieved.
Description
Technical field
The present invention relates to technical field that the town gas pipeline is monitored in real time, particularly relate to a kind of infrasonic wave technical monitoring that utilizes and judge whether pipeline leaks, utilize aiding sensors analysis background noise, by the real-time monitoring system and the using method thereof of urban pipe network node covering whole city.
Background technique
Modern pipeline transport originates in the middle of the 19th century, to after the sixties in 20th century as gyp transportation means.Through 100 years of development, pipeline transport had become one of five big transportation means that walk abreast with railway, highway, aviation, water transport already, and it has become the indispensable constituent element of modern society.But along with increasing of pipeline, manage the growth in age, and inevitably corrosion and reasons such as nature or artificial damage, a large amount of pipe networks exceeded or near working life, pipeline accident takes place again and again, and since the danger and the contaminativity of defeated medium, can cause huge loss of life and property and environmental pollution in case have an accident.If can in time find to leak, determine accurately just can alleviate the harm that leakage accident causes effectively by leakage point.
In view of the model of gas pipe line is subjected to fluid characteristics, physical features situation, and the restriction of many complicated factors such as pipeline self characteristics, make that the pipeline leakage testing technology is a social difficult problem always.Though have the method for multiple detection pipe leakage at present in the world, technology is also in continuous development, and its introduction expense is extremely expensive.At present, the line leakage method that is based on hardware and software commonly used.Hardware based method is meant the hardware unit of utilization by various physical principle design, as infrared temperature sensor based on vision, ultrasonic wave sensor based on the sense of hearing, based on carbon oxygen detection device of sense of smell etc., it is carried or be laid on the pipeline, detect the leakage and the location of pipeline with this; Method based on software then is flow, pressure, temperature and other data of gathering pipeline according to computer data acquisition system in real time, utilize the principles such as variation, physics or momentum balance, system dynamic model, pressure gradient of flow or pressure, calculate by software leakage is detected and locatees.
How utilizing the monitored by infrasonic wave device to come accurate receiving pipeline leakage signal, utilize the correct analysis background noise of aiding sensors, by the real-time monitoring system of urban pipe network node monitoring covering whole city, is the problem that those skilled in the art need solve.
Summary of the invention
For overcoming the above-mentioned defective that exists in the prior art, whether the object of the invention provides a kind ofly can utilize the infrasonic wave technical monitoring to monitor pipeline to leak, by the real-time monitoring system and the using method thereof of urban pipe network node covering whole city.
According to the solution of the present invention, the gas leakage monitoring system can be divided into three parts, and one is the monitoring of urban pipe network node, and two is the reception of tube pass sound wave leakage signal, and three is the analysis of leakage signal.
The gas leakage monitoring system mainly is to be used for the town gas pipe network, the town gas pipe network can be represented with the reticular structure of tree type, each domestic consumer is final node, the submeter of dwelling unit is domestic consumer's a upper node, the voltage regulating station of coal gas is the upper node of dwelling unit submeter, and gas distribution plant is the root node of tree mesh structure, as shown in Figure 1.The gas leakage monitoring system is installed the monitored by infrasonic wave device on each node from the dwelling unit to the gas distribution plant, and unifies monitoring by CCC's computer.Like this for each section delivering pipe, the infrasonic wave detection apparatus at two ends and this segment pipe have all been formed a little subtense angle up and down, each subtense angle can be monitored in real time to this segment pipe, each subtense angle passes through the GPS wirelessly transmitting data again to central control computer, is further checked by central control computer.
The gas leakage monitoring system adopts reception infrasonic wave signal to come pipe leakage is monitored.Because leakage point can produce various acoustic signals during gas pipeline leakage, wherein contains infrasonic wave, ultrasound, pressure wave, stress wave etc., after the monitored by infrasonic wave device of pipe ends receives the infrasonic wave signal, goes out the leakage situation of pipeline by analysis and judgement.Concrete monitored by infrasonic wave device comprises: infrasonic sensor, aiding sensors, probe, metal covering, data processing system, GPS sequential collector, two torsion circles unit, data buffer memory, as shown in Figure 2.Data processing system is the central die of whole monitored by infrasonic wave device, it is responsible for controlling whole monitored by infrasonic wave device, the infrasonic wave signal of infrasonic sensor collection is simply handled, if infrasonic sensor receives doubtful leakage signal continuously in a period of time, data processing system will send to central control computer with the data of the infrasonic sensor in a period of time, aiding sensors collection together with the gps clock data in the lump by the GPS unit; Utilize the attenuation of soil for high-frequency signal, leakage signal and background noise will be decayed by soil significantly greater than 3000HZ, so what probe received mainly is the signal that is lower than 3000HZ, again this signal is fallen 250HZ to the signal between the 3000HZ by low pass filter filters out, then mainly be left the signal of 250HZ, because frequency is mainly determined by background noise less than the signal of 250HZ, aiding sensors can well analyze background noise according to the signal that receives, form the form that array signal detects by the aiding sensors of each node monitoring device, leak any point in the urban pipe network, the aiding sensors of each node all can receive relevant low frequency leakage signal, according to the principle analysis background noise that array signal detects, this denoising to signal is provided convenience; GPS sequential collector is responsible for the receive clock signal, and when data processing system sent data, the GPS unit can send to central control computer in the lump with the CLK clock of gathering; The unit coupling of two torsion circles and infrasonic sensor and aiding sensors, its role is to control infrasonic sensor and aiding sensors and alternately gather sensing data, it is seamless that two torsion circles unit guarantees to gather signal, can make frequency acquisition up to 32KHZ, more international 1KHZ has had no small raising.
After CCC's computer receives monitored by infrasonic wave device signal transmitted, will judge further whether pipeline leaks and the location of leakage point.Because the monitored by infrasonic wave device at gas pipe line two ends can receive the infrasonic wave signal that leakage point transmits when pipe leakage, so just have the up and down time difference of two ends received signal, judge the leakage situation of pipeline again according to the distance between known infrasonic wave velocity of propagation and two the monitored by infrasonic wave devices.According to infrasonic wave velocity of propagation V, the distance L between the pipeline upper and lower end infrasonic sensor, it is t that two ends capture the infrasonic wave time difference, can obtain the distance of leakage point to pipeline upper end data acquisition unit
As shown in Figure 4.And the further accurate leakage point position of employing iterative algorithm, the position location that obtains estimating according to top formula, data such as anti-pressure that pushes away this position and temperature, thereby calculate the infrasonic wave velocity of wave that this puts pipeline section of living in again, repeat above step, can obtain different position etc., when circulation reaches certain step number, to fluctuate in a certain very little scope in the position, determine that this position location is the leak position.
Denoising, extraction, analysis about the infrasonic wave signal also are to be responsible for by central control computer.Central computer carries out comprehensive analysis to leakage signal, the noise signal of each node, adopts correlation analysis to come leakage signal is carried out filtering in conjunction with the way of method of least squares and Kalamn filtering, carries out the location of leakage point then with iterative algorithm.Because the infrasonic wave signal that pipe leakage causes can pass to each monitoring side, the coherence of its each end signal can be got rid of noise interference to a certain extent and leak erroneous judgement; And the combining of method of least squares and Kalamn filtering, for judging that source location, filtering interfering have good effect.Relevant function method be utilize correlation technique to pipeline leakage point both sides sensor acquisition to signal carry out correlation computations, thereby the method that leakage is detected, the signal that the relevant feature of the signal characteristic that receives based on two ends, the position of correlation peak characterize the leakage point place propagates into the time difference of two ends measuring point.If but leakage rate is very slow, leakage signal can be very faint, so the scheme consideration is further analyzed signal again in conjunction with method of least squares and Kalamn filtering and contrast method of wavelet.
Above-mentioned other purposes of the present invention and the further applicable scope of feature thereof can be by clear learning in the following detailed description.But these detailed explanations and the embodiment who is mentioned only supply illustration, are not to be construed as limiting the invention, and those of skill in the art are to be understood that other version.
Description of drawings
Fig. 1 is the structural representation according to town gas pipe network node of the present invention;
Fig. 2 is the structural representation according to monitored by infrasonic wave device of the present invention;
Fig. 3 is the structural representation of installing according to infrasonic sensor of the present invention;
Fig. 4 is the structural representation according to leakage point of the present invention location;
Embodiment
Below with reference to the accompanying drawings the preferred embodiments of the present invention are described in detail.
As described in Figure 1, the invention provides a kind of town gas pipe network monitoring system that is used for, this urban pipe network node system comprises: the voltage regulating station 12 of gas distribution plant 11, coal gas, dwelling unit 13, domestic consumer 14.The town gas pipe network is the reticular structure of tree type, each domestic consumer 14 is final nodes, the submeter of dwelling unit 13 is upper nodes of domestic consumer, and the voltage regulating station 12 of coal gas is the upper node of dwelling unit submeter, and gas distribution plant 11 is root nodes of tree mesh structure.This gas leakage monitoring system from dwelling unit 13 to gas distribution plant each node of 11 monitored by infrasonic wave device is installed, all infrasonic wave devices are got in touch by GPS wireless transmission 30 and central control computer 31, and control centre is responsible for the signal of gathering is handled.
More particularly, as shown in Figure 2, concrete monitored by infrasonic wave device 41 comprises: infrasonic sensor 21, noise transducer 23, probe 25, metal covering 24, data processing system 29, GPS sequential collector 30, two torsion circles unit 27, data buffer memory 28.Data processing system 29 is central die of whole monitored by infrasonic wave device 41, it is responsible for controlling whole monitored by infrasonic wave device 41, the infrasonic wave signal of infrasonic sensor 21 collections is simply handled, if infrasonic sensor 21 receives doubtful leakage signal continuously in a period of time, data processing system 29 will send to central control computer 31 together with the gps clock data in the lump by the data that the infrasonic sensor in a period of time 21, noise transducer 23 are gathered in GPS unit 30, and native system is selected the arm family chip for use according to processor 29 effects, cost; The probe of noise transducer 23 is stretched in the about 30 cun place of below ground, because high-frequency signal can be decayed significantly by soil, 23 of noise transducers are accepted low frequency signal, and low frequency signal is mainly determined by noise signal, so noise transducer 23 main receptions is the noise signal feature, form the form that array signal detects by the aiding sensors 23 of each node 15 monitoring devices, according to the principle analysis background noise of array signal detection; Metal covering 24 is used for getting in touch of noise insulation sensor 23 and atmosphere, because also can have noise signal in the atmosphere, can influence the accuracy of noise transducer 23 like this; GPS sequential collector 30 is responsible for the receive clock signal, and when data processing system 29 sent data, GPS unit 30 can send to central control computer 31 in the lump with the CLK clock of gathering; 27 couplings and infrasonic sensor 21 and noise transducer 22 of two torsion circles unit, its role is to control infrasonic sensor 21 and noise transducer 22 is alternately gathered sensing data, it is seamless that two torsion circles unit 27 guarantees to gather signal, can make frequency acquisition up to 32KHZ, more international 1KHZ has had no small raising.
This figure monitored by infrasonic wave device 41 that just drawn, when in fact pipeline took place to leak, each interdependent node 15 all can receive leakage signal, so actual algorithm can be judged according to the image data comprehensive analysis of each node 15.
As shown in Figure 3, the validity of data capture is sensitivity and its mounting point of sensor 21.This programme adopts pressure inlet tube 33, connection valve 34, bleeder pipe 35 to connect infrasonic sensor 21, pressure inlet tube 33, connection valve 34, bleeder pipe 35 are connected in turn on pipeline 22 interfaces, with cutting ferrule or be threaded, pressure inlet tube 33 and bleeder pipe 35 are the seamless steel pipe of inner wall smooth between them.The length of whole device is no more than 2 meters, and the length of pressure inlet tube 33 is long, pattern is installed not to all causing signal degradation.In the installation process, the suitable distance between pressure inlet tube 33 inclinations and two monitoring devices 41 all will influence the reception of signal.
As shown in Figure 4, native system is installed monitored by infrasonic wave device 41 at gas pipe line 22 two ends, when two ends all receive the infrasonic wave signal up and down, so just have the up and down time difference of two ends received signal, judge the leakage situation of pipeline 22 again according to the distance between known infrasonic wave velocity of propagation and two the monitored by infrasonic wave devices 41.Wherein infrasonic wave velocity of propagation and infrasonic wave velocity of wave belong to the velocity of sound, setting parameter f, g, h (they are relevant to the local derviation of temperature T with pressure p), and R is a molar gas constant, and M is a molecular weight gas, and γ is a ratio of specific heat, and then the speed propagated in gas of infrasonic wave equals:
According to the sound wave formula, infrasonic wave velocity of propagation and temperature, medium molecule amount in gas is relevant.Wherein establishing the infrasonic wave velocity of propagation is v, and leakage point 42 is X to the distance of pipeline upper end data acquisition unit 41, and the distance between the pipeline upper and lower end infrasonic sensor 21 is L, and two ends are pounced on and grasped the infrasonic wave time difference is t, then:
Because the infrasonic wave velocity of propagation is an erection rate, so adopt further accurate leakage point 42 positions of iterative algorithm.According to the position location that obtains estimating, data such as anti-pressure that pushes away this position and temperature, thereby calculate the infrasonic wave velocity of wave that this puts pipeline section 22 of living in again, repeat above step, can obtain different position etc., when circulation reaches certain step number, will fluctuate in a certain very little scope in the position, determine that this position location is leak position 42.
Central control computer 41 is responsible for a series of pipeline data is analyzed.Central computer 41 carries out comprehensive analysis to leakage signal, the noise signal of each node 15, adopts correlation analysis to come leakage signal is carried out filtering in conjunction with the way of method of least squares and Kalamn filtering, carries out the location of leakage point 42 then with iterative algorithm.
Because the infrasonic wave signal that pipe leakage causes can pass to each monitoring side 41, the coherence of its each end signal can be got rid of noise interference to a certain extent and leak erroneous judgement; And the combining of method of least squares and Kalamn filtering, for judging that source location, filtering interfering have good effect.Relevant function method is to utilize correlation technique that the signal that 42 liang of side sensers 21 of pipeline leakage point collect is carried out correlation computations, thus the method that leakage is detected.The signal that the relevant feature of the signal characteristic that receives based on two ends, the position of correlation peak characterize the leakage point place propagates into the time difference of two ends measuring point.If but leakage rate is very slow, leakage signal can be very faint, so the scheme consideration is further analyzed signal again in conjunction with method of least squares and Kalamn filtering and contrast method of wavelet.
Because the attenuation of soil, noise transducer 23 will obtain the feature of noise signal, and this is very helpful to analyzing leakage signal, by analyzing noise signal, be more convenient for to leaking the extraction of infrasonic wave signal.Iterative algorithm is by the position location to estimation, and data such as the pressure of this position and temperature, repeatedly carry out iterative computation, with accurate leak position 42.
Gas pipeline leakage monitoring is crucial to be the accuracy of image data and to effective analysis of signal, this programme is after having summed up all kinds of schemes in the past, a kind of accurate data acquisition method has been proposed, and combine a series of signal processing mode, therefore have reason to believe that the gas leakage monitoring scheme can obtain the achievement of expection.
More than disclosed only be the preferred embodiments of the present invention, can not limit the scope of the present invention with this certainly.Be appreciated that the equivalent variations that the essence that limits in the appended claims according to the present invention and scope are done, still belong to the scope that the present invention is contained.
Claims (6)
1. one kind is used for system that the town gas pipe network is monitored in real time, and this system comprises:
Be used to monitor the monitored by infrasonic wave device (41) of urban pipe network node;
The infrasonic sensor device (21) that is used for monitoring pipe road infrasonic wave leakage signal;
Be used to install metallic conduit device (33), (35) of infrasonic sensor;
The Auxiliary Sensor Unit (23) that is used for the receiving pipeline ambient noise signal.
2. Verification System according to claim 1 is characterized in that: voltage regulating station (12), dwelling unit (13), domestic consumer (14) that described monitored by infrasonic wave device (41) is placed in urban pipe network node gas distribution plant (11), coal gas locate.
3. Verification System according to claim 1 is characterized in that: infrasonic sensor device (21) is installed on pipe network node (15) in described, at gas pipe line (22) two ends up and down.
4. Verification System according to claim 1 is characterized in that: described metallic conduit device comprises pressure inlet tube (33) and bleeder pipe (35), and pressure inlet tube (33) and bleeder pipe (35) are the seamless steel pipe of inner wall smooth.
5. Verification System according to claim 1, it is characterized in that: described Auxiliary Sensor Unit (23) is installed on the corresponding infrasonic sensor device (21), and forms the form that array signal detects by the aiding sensors (23) of each urban pipe network node (15).
6. a using method that is used for Verification System according to claim 1 comprises the steps:
Described infrasonic sensor device (21) is placed on the described pipeline (22);
Described Auxiliary Sensor Unit (23) is installed on the corresponding infrasonic sensor device (21) all Auxiliary Sensor Units (23)) form the form that array signal detects;
Described monitored by infrasonic wave device (21) is installed on the town gas pipe network node (15);
Described control centre computer (31) is installed corresponding Denoising Algorithm software, and receive the data of monitored by infrasonic wave device (21) by GPS unit (30).
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375682A (en) * | 2012-04-17 | 2013-10-30 | 杨楚原 | Intelligent GIS pipe network system |
| CN103423601A (en) * | 2012-05-15 | 2013-12-04 | 西安文理学院 | Method for intelligentizing gas and liquid delivery pipeline |
| CN104500984A (en) * | 2014-12-30 | 2015-04-08 | 北京科创三思科技发展有限公司 | Sub-high pressure A gas pipeline leakage monitoring system |
| CN107504374A (en) * | 2017-10-20 | 2017-12-22 | 北京科创三思科技发展有限公司 | Gas pipeline acoustic monitoring system |
| CN107940246A (en) * | 2017-03-15 | 2018-04-20 | 吉林省百瑞生科技发展有限公司 | A kind of fluid line source of leaks monitoring and positioning system and method |
| CN108758354A (en) * | 2018-05-03 | 2018-11-06 | 太原理工大学 | Heat supply pipeline leak detection system and method based on infrasound and reference point |
| CN112856253A (en) * | 2021-04-09 | 2021-05-28 | 浙江和达科技股份有限公司 | Method and system for positioning pipe burst of water supply pipe network |
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2009
- 2009-09-30 CN CN2009102061121A patent/CN102032447A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375682A (en) * | 2012-04-17 | 2013-10-30 | 杨楚原 | Intelligent GIS pipe network system |
| CN103423601A (en) * | 2012-05-15 | 2013-12-04 | 西安文理学院 | Method for intelligentizing gas and liquid delivery pipeline |
| CN103423601B (en) * | 2012-05-15 | 2016-01-20 | 西安文理学院 | A kind of Intelligentized method of gas-liquid conveyance conduit |
| CN104500984A (en) * | 2014-12-30 | 2015-04-08 | 北京科创三思科技发展有限公司 | Sub-high pressure A gas pipeline leakage monitoring system |
| CN107940246A (en) * | 2017-03-15 | 2018-04-20 | 吉林省百瑞生科技发展有限公司 | A kind of fluid line source of leaks monitoring and positioning system and method |
| CN107940246B (en) * | 2017-03-15 | 2019-02-26 | 吉林省百瑞生科技发展有限公司 | A kind of fluid line source of leaks monitoring and positioning system and method |
| CN107504374A (en) * | 2017-10-20 | 2017-12-22 | 北京科创三思科技发展有限公司 | Gas pipeline acoustic monitoring system |
| CN108758354A (en) * | 2018-05-03 | 2018-11-06 | 太原理工大学 | Heat supply pipeline leak detection system and method based on infrasound and reference point |
| CN108758354B (en) * | 2018-05-03 | 2023-09-12 | 太原理工大学 | Heat supply pipeline leakage detection system and method based on infrasonic wave and reference point |
| CN112856253A (en) * | 2021-04-09 | 2021-05-28 | 浙江和达科技股份有限公司 | Method and system for positioning pipe burst of water supply pipe network |
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Application publication date: 20110427 |