CN114383785A - Correlation instrument and pipeline water leakage point detection method - Google Patents
Correlation instrument and pipeline water leakage point detection method Download PDFInfo
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- CN114383785A CN114383785A CN202111666327.9A CN202111666327A CN114383785A CN 114383785 A CN114383785 A CN 114383785A CN 202111666327 A CN202111666327 A CN 202111666327A CN 114383785 A CN114383785 A CN 114383785A
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- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/24—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations
- G01M3/243—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using infrasonic, sonic, or ultrasonic vibrations for pipes
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Abstract
The utility model relates to a correlation appearance and pipeline water leakage point detection method, wherein, correlation appearance includes host computer, two at least signal transmitter, every signal transmitter is connected with a sensor probe, every signal transmitter respectively with the host computer communication, each signal transmitter can install in on the pipeline. The sound velocity correction unit is used for measuring the propagation velocity of underwater sound of a pipeline between two signal transmitters and is connected with the signal transmitters. The correlation instrument does not completely adopt theoretical sound velocity to detect the water leakage point of the pipeline, but can take account of the difference between a propagation velocity value and an actual propagation velocity value caused by corrosion, aging, given pipe diameter errors and other factors of the pipeline, so that real-time sound velocity correction is realized, and the detection precision and efficiency of the water leakage point of the pipeline are improved. The utility model provides a coherent appearance can accomplish that non-invasive detection does not destroy the pipeline, and easy operation does not rely on staff's experience, improves leak hunting efficiency greatly.
Description
Technical Field
The application relates to the technical field of municipal pipelines, in particular to a correlation instrument and a pipeline water leakage point detection method.
Background
The urban underground pipe network is an important infrastructure for the survival and development of cities, and the normal operation and effective work of the urban underground pipe network become important preconditions for the sustainable development of the cities. Along with the rapid development of the economy of China and the remarkable improvement of the urbanization degree, the urban scale is continuously enlarged, a plurality of water supply networks and heating power networks are expanded and newly built according to the development requirements of the city, and a large number of old pipelines are replaced to meet the requirements of the economic development and the urban construction. But the problem of urban pipe network leakage in China is very serious. The urban water supply network often causes pipeline leakage and water resource waste due to reasons such as pipeline corrosion aging, unqualified construction operation, overlarge pressure in the pipeline, ground collapse and the like. According to statistics, the average leakage rate of a water supply network in China is over 20 percent, the leakage rate is increased year by year, the north is particularly serious, even the water supply efficiency of some small and medium-sized cities is over 30 percent, the leakage rate is up to 66 percent, and the annual running water loss is nearly 70 billion cubic meters. Therefore, the method controls and reduces the leakage of the water supply network, and has important significance for saving water resources and implementing sustainable development strategy in China.
At present, the leakage detection means of pipe networks in small and medium-sized cities in China still mainly adopts a manual method, and professional personnel detect leakage points through leakage listening instruments. However, this method is very laborious, has poor interference resistance and must be carried out by experienced professionals. Widely applied abroad is a correlator which integrates signal collection, signal processing and computer-related software system analysis and positioning, and a special company provides leak detection and technical support services. Although China also introduces correlation instruments for pipeline leakage monitoring, water supply networks in China are complex in distribution and various in pipe type, leakage positioning parameters used in the correlation instruments in China are defined and set by referring to the conditions of foreign water supply pipelines, and because the manufacturing process and material selection of pipelines in China are different from those in foreign countries, the actual positioning parameters are different from the parameters used in the instruments, and inaccurate positioning or errors are often caused.
Therefore, the inventor provides a correlation instrument and a pipeline water leakage point detection method.
Disclosure of Invention
(1) Technical problem to be solved
The embodiment of the application provides a correlation instrument and a pipeline water leakage point detection method, and solves the technical problem that the pipeline water leakage point cannot be accurately detected.
(2) Technical scheme
In order to solve the above problem, an embodiment of the present application provides a correlator, including:
a host;
each signal transmitter is connected with a sensor probe, each signal transmitter is communicated with the host machine, and each signal transmitter can be arranged on the pipeline;
and the sound velocity correction unit is used for measuring the propagation velocity of underwater sound of the pipeline between the two signal transmitters and is connected with the signal transmitters.
Optionally, the sound velocity correction unit includes a sound wave receiving module and a sound wave transmitting module, the sound wave receiving module is connected to one of the signal transmitters, and the sound wave transmitting module is connected to the other opposite signal transmitter.
Optionally, the sensor probe comprises an acceleration sensor and a first power supply, which are electrically connected, and the acceleration sensor is connected with the signal transmitter.
Optionally, the signal transmitter comprises:
the data storage module is used for storing data;
the first communication module is used for communicating with the host;
an ADC for converting the received electrical signal into a data signal;
a second power supply for supplying power;
the main control board is used for processing data and controlling the operation of the data storage module, the first communication module, the ADC and the second power supply;
the data storage module, the first communication module, the ADC and the second power supply are respectively connected with the main control board.
Optionally, the host includes a computer and a second communication module connected to each other, and the second communication module communicates with the first communication module.
The embodiment of the application also provides a pipeline water leakage point detection method, which comprises the following steps:
acquiring a corrected sound velocity of the pipeline;
and acquiring the position of the water leakage point of the pipeline according to the corrected sound velocity.
Optionally, after obtaining the position of the water leakage point of the pipeline according to the corrective sound velocity, the method further includes: and verifying the water leakage point of the pipeline.
(3) Advantageous effects
In summary, theoretically, the propagation speed of the sound wave in the pipeline can be obtained by obtaining information such as the material of the pipeline, but due to factors such as aging of the pipeline, the propagation speed of the sound wave in the pipeline has errors. In the application, the sound velocity correction unit can accurately acquire the propagation velocity of the underwater sound rolling between the two signal transmitters, and can avoid the influence caused by factors such as pipeline aging. The signal transmitter transmits signals, so that the correction sound velocity can be accurately obtained.
The correlation instrument does not completely adopt theoretical sound velocity to detect the water leakage point of the pipeline, but can take account of the difference between a propagation velocity value and an actual propagation velocity value caused by corrosion, aging, given pipe diameter errors and other factors of the pipeline, so that real-time sound velocity correction is realized, and the detection precision and efficiency of the water leakage point of the pipeline are improved.
The utility model provides a coherent appearance can accomplish that non-invasive detection does not destroy the pipeline, and easy operation does not rely on staff's experience, improves leak hunting efficiency greatly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a correlator in an embodiment of the present application.
Fig. 2 is a flowchart of a method for detecting a water leakage point of a pipeline according to an embodiment of the present application.
In the figure:
101-a host; 102-a signal transmitter; 103-sound velocity correction unit; 104-sensor probe; 11-a computer; 12-a second communication module; 21-a data storage module; 22-a first communication module; 23-an ADC; 24-a second power supply; 25-a main control machine; 31-an acoustic wave receiving module; 32-a sound wave emitting module; 41-an acceleration sensor; 42-first power supply.
Detailed Description
Embodiments of the present application will be described in further detail below with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described, but covers any modifications, alterations and improvements in the parts, components and connections without departing from the spirit of the application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an embodiment of the present application provides a correlator, including:
a host 101;
at least two signal transmitters 102, each signal transmitter 102 is connected with a sensor probe 104, each signal transmitter 102 is respectively communicated with the host 101, and each signal transmitter 102 can be installed on the pipeline;
the sound velocity correction unit 103 is used for measuring the propagation velocity of underwater sound of the pipeline between the two signal transmitters 102, and the sound velocity correction unit 103 is connected with the signal transmitters 102.
When the correlator of the embodiment detects a water leakage point of a pipeline, a signal transmitter 102 and a sensor probe 104 can be arranged at intervals. L is (S-V × Td)/2, L is the distance from the leak point to the nearest sensor probe 104, S is the distance between the sensor probes 104 on both sides of the pipeline leak point, V is the propagation speed of the sound wave leaking into the pipeline, and Td is the time difference of the sound wave leaking between the two sensor probes 104 closest to Td.
Theoretically, the propagation speed of the sound wave in the pipeline can be obtained by obtaining information such as the material of the pipeline, but due to factors such as aging of the pipeline, the propagation speed of the sound wave in the pipeline has errors. In this embodiment, the sound velocity correction unit 103 can accurately obtain the propagation velocity of the underwater sound rolling between the two signal transmitters, and can avoid the influence caused by factors such as pipeline aging. The signal transmitter transmits signals, so that the correction sound velocity can be accurately obtained.
The correlator of the embodiment does not completely adopt theoretical sound velocity to detect the water leakage point of the pipeline, but can consider the difference between the propagation velocity value and the actual propagation velocity value caused by corrosion, aging, given pipe diameter error and other factors, so as to correct the sound velocity in real time and improve the detection precision and efficiency of the water leakage point of the pipeline.
The correlator of the embodiment can achieve non-invasive detection without damaging pipelines, is simple to operate, does not depend on the experience of workers, and greatly improves the leak detection efficiency.
In an embodiment, the sound velocity correction unit 103 includes a sound wave receiving module 31 and a sound wave transmitting module 32, where the sound wave receiving module 31 is connected to one of the signal transmitters 102, and the sound wave transmitting module 32 is connected to the other opposite signal transmitter 102. The sound wave emitting module 32 is used for emitting sound waves, and the sound wave receiving module 31 is used for receiving the sound waves emitted by the sound wave emitting module 32. Specifically, the acoustic wave emission module 32 includes a pulse generator, a constant current source, and an acoustic wave generation probe. The pulse generator generates an excitation signal, and the sound wave is generated by the sound wave generating probe. The constant current source supplies power to the sound wave emitting module 32, the power supply voltage is 5-24V, 24VDC/4mA is output, and three-wire system output is realized. The acoustic wave receiving module 31 is an acoustic wave sensor, and converts a received acoustic wave signal into an electrical signal.
In one embodiment, the sensor probe 104 includes an acceleration sensor 41 and a first power source 42 electrically connected, and the acceleration sensor 41 is connected to the signal transmitter 102. The vibration noise generated by the water leakage point of the pipeline is generally within the range of 0-100mg, and the frequency range is 100-3000 Hz. Therefore, the acceleration sensor 41 has a frequency range of 20-3000 Hz. The acceleration sensor 41 generally converts acceleration into other physical quantities to indirectly measure the acceleration. The conventional acceleration sensor 41 works according to the piezoelectric effect of the crystal, and the principle is that when acceleration occurs, the crystal inside the sensor deforms to generate voltage, only the voltage value needs to be measured, and the measured acceleration value can be detected by using the relationship (inherent relationship) among the voltage, the deformation and the acceleration of the crystal. The first power supply 42 supplies power to the sensor probe 104 with a supply voltage of 5-24V, 24VDC/4mA output, three wire system output.
In one embodiment, the signal transmitter 102 includes:
a data storage module 21 for storing data;
a first communication module 22, configured to communicate with the host 101;
an ADC23 for converting the received electrical signal into a data signal;
a second power supply 24 for supplying power;
the main control board 25 is used for processing data and controlling the operation of the data storage module 21, the first communication module 22, the ADC23 and the second power supply 24;
the data storage module 21, the first communication module 22, the ADC23, and the second power supply 24 are respectively connected to the main control board 25.
The main control board 25 is a microcontroller, and the second power supply 24 is a rechargeable lithium battery with a voltage of 7.2V. The second power supply 24 includes a buck chip; the buck chip converts the input 7.2V into 3.3V and 5V required by each internal module. The data storage module is used for storing data needing to be stored, such as noise data, battery power information and the like, and can be erased and written for multiple times.
In one embodiment, the host 101 includes a computer 11 and a second communication module 12 connected to each other, and the second communication module 12 communicates with the first communication module 22. The computer 11 is connected with the second communication module 12 through a USB interface, and the computer 11 can also provide cigarette lighting for the second communication module 12 through the USB interface. The second communication module 12 communicates with the first communication module 22 through one of WIFI, 4G and 3G, GPRS.
Referring to fig. 2, an embodiment of the present application further provides a method for detecting a water leakage point of a pipeline, including:
s1, acquiring a corrected sound velocity of the pipeline;
and S2, acquiring the position of the water leakage point of the pipeline according to the corrected sound velocity.
The method for detecting the water leakage point of the pipeline in the embodiment also has the advantages, and is not described herein again.
In an embodiment, after obtaining the position of the water leakage point of the pipeline according to the corrected sound velocity, the method further includes: and verifying the water leakage point of the pipeline. And verifying by digging out the detected water leakage point of the pipeline.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present application is not limited to the particular steps and structures described above and shown in the drawings. Also, a detailed description of known methane detection method techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not limited to the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. A correlator, comprising:
a host;
each signal transmitter is connected with a sensor probe, each signal transmitter is communicated with the host machine, and each signal transmitter can be arranged on the pipeline;
and the sound velocity correction unit is used for measuring the propagation velocity of underwater sound of the pipeline between the two signal transmitters and is connected with the signal transmitters.
2. The correlator as claimed in claim 1 wherein the sound speed correction unit includes a sound wave receiving module and a sound wave transmitting module, the sound wave receiving module being coupled to one of the signal transmitters, the sound wave transmitting module being coupled to the other of the opposing signal transmitters.
3. The correlator as in claim 1 wherein said sensor probe includes an acceleration sensor and a first power source electrically connected, said acceleration sensor being connected to said signal transmitter.
4. The correlator as in claim 1 wherein said signal transmitter comprises:
the data storage module is used for storing data;
the first communication module is used for communicating with the host;
an ADC for converting the received electrical signal into a data signal;
a second power supply for supplying power;
the main control board is used for processing data and controlling the operation of the data storage module, the first communication module, the ADC and the second power supply;
the data storage module, the first communication module, the ADC and the second power supply are respectively connected with the main control board.
5. The correlator as in claim 4 wherein the host includes a computer and a second communication module connected to communicate with the first communication module.
6. A method for detecting a water leakage point of a pipeline is characterized by comprising the following steps:
acquiring a corrected sound velocity of the pipeline;
and acquiring the position of the water leakage point of the pipeline according to the corrected sound velocity.
7. The method for detecting the water leakage point of the pipeline according to claim 6, wherein after the position of the water leakage point of the pipeline is obtained according to the corrected sound velocity, the method further comprises the following steps: and verifying the water leakage point of the pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111666327.9A CN114383785A (en) | 2021-12-31 | 2021-12-31 | Correlation instrument and pipeline water leakage point detection method |
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| CN202111666327.9A CN114383785A (en) | 2021-12-31 | 2021-12-31 | Correlation instrument and pipeline water leakage point detection method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2758724Y (en) * | 2004-09-28 | 2006-02-15 | 北京埃德尔黛威新技术有限公司 | Liquid pressure pipe leak detector |
| KR20170006149A (en) * | 2015-07-07 | 2017-01-17 | (주)본테크놀러지 | Leakage detecting apparatus |
| CN108194841A (en) * | 2017-12-20 | 2018-06-22 | 中国船舶重工集团公司第七0研究所 | One kind has source calibration formula water supply line leakage related detecting method and device |
| 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 |
-
2021
- 2021-12-31 CN CN202111666327.9A patent/CN114383785A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2758724Y (en) * | 2004-09-28 | 2006-02-15 | 北京埃德尔黛威新技术有限公司 | Liquid pressure pipe leak detector |
| KR20170006149A (en) * | 2015-07-07 | 2017-01-17 | (주)본테크놀러지 | Leakage detecting apparatus |
| CN108194841A (en) * | 2017-12-20 | 2018-06-22 | 中国船舶重工集团公司第七0研究所 | One kind has source calibration formula water supply line leakage related detecting method and device |
| 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 |
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