CN111022938A - System for accurately positioning water leakage point of underground water pipe - Google Patents
System for accurately positioning water leakage point of underground water pipe Download PDFInfo
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- 230000001052 transient effect Effects 0.000 claims description 15
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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Abstract
The invention provides a system for accurately positioning a water leakage point of an underground water pipe, which relates to the technical field of intelligent pipe networks and comprises the following components: the data acquisition module is used for detecting real-time water flow, real-time vibration signals and real-time sound wave signals at the pipe section inlet and the pipe section outlet; the curve generation module is used for generating a vibration signal curve and an acoustic wave signal curve; the leakage judging module is used for outputting a leakage judging result when the flow difference value between the pipe section inlet and the pipe section outlet of each pipe section is larger than a preset flow threshold value; the first processing module is used for processing the leakage judgment result to obtain the average delay time caused by the leakage point; the second processing module is used for matching the leakage judgment result and the attribute parameters in a preset corresponding relation table to obtain a signal propagation rate; and the third processing module is used for calculating the distance between the leakage point and the pipe section inlet and the pipe section outlet of the leakage pipe section according to the average delay time and the signal propagation rate. The invention effectively improves the positioning accuracy of the leakage point.
Description
Technical Field
The invention relates to the technical field of intelligent pipe networks, in particular to a system for accurately positioning a water leakage point of an underground water pipe.
Background
The underground water pipe is one of the public infrastructures in the city, plays the role of conveying a pressure water head to each water utilization node, and plays a very important role in ensuring the improvement of the living standard of people, the stable development of city economy and the stability of society. During the running process of the underground water pipe, leakage can inevitably occur due to the quality of the pipe material, the construction quality, the artificial or natural reasons such as corrosion, aging and the like. The seepage of underground pipe network has caused the waste of water resource on the one hand, and on the other hand is influencing resident's quality of life and cost of life again. How to control and reduce the leakage of the water supply pipeline, and the position where the leakage occurs is positioned in time, thereby reducing the waste of water resources, ensuring the normal operation of the pipeline and having important guiding significance.
In the prior art, a manual inspection mode is mainly adopted, leakage is found and leakage points are positioned through basic equipment such as a leakage listening rod, an electronic leakage listening instrument and an impact ground auger, the leakage points are difficult to find in time, waste of manpower and material resources is caused, water supply cannot be effectively guaranteed, and the safety of drinking water of people is affected.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a system for accurately positioning a water leakage point of an underground water pipe, which specifically comprises the following steps:
the data acquisition module sets up respectively in the pipeline section entry and the pipeline section exit of each pipeline section of underground water pipe, the data acquisition module specifically includes:
the flow sensor is used for detecting real-time water flow of the pipe section inlet and the pipe section outlet in real time;
the vibration sensor is used for detecting real-time vibration signals of the pipe section inlet and the pipe section outlet in real time;
the acoustic wave sensor is used for detecting real-time acoustic wave signals of the pipe section inlet and the pipe section outlet in real time;
the curve generation module is connected with the data acquisition module and comprises:
the first generating unit is used for generating a corresponding vibration signal curve according to each real-time vibration signal;
the second generating unit is used for generating a corresponding sound wave signal curve according to each real-time sound wave signal;
the first storage module is connected with the curve generation module and used for storing the vibration signal curve and the sound wave signal curve to form a signal curve database;
the leakage judging module is connected with the data acquisition module and used for calculating a flow difference value between the pipe section inlet and the pipe section outlet of each pipe section according to the real-time water flow and outputting a leakage judging result indicating that the corresponding pipe section is a leakage pipe section when the flow difference value is greater than a preset flow threshold value;
the first processing module is respectively connected with the first storage module and the leakage judging module and used for processing to obtain the average delay time between signal transient moments between the pipe section inlet and the pipe section outlet caused by a leakage point in the leakage pipe section according to the leakage judging result, the vibration signal curve and the sound wave signal curve of the pipe section inlet of the leakage pipe section and the vibration signal curve and the sound wave signal curve of the pipe section outlet of the leakage pipe section;
the second storage module is used for storing a corresponding relation table between the attribute parameters of each pipe section of the underground water pipe and the propagation rate of the sound wave signals;
the second processing module is respectively connected with the leakage judging module and the second storage module and is used for matching in a corresponding relation table according to the leakage judging result and the attribute parameters of the leakage pipe section to obtain the matched acoustic signal propagation rate;
and the third processing module is respectively connected with the first processing module and the second processing module and used for respectively calculating the distance between the leakage point of the leakage pipe section and the pipe section inlet and the pipe section outlet of the leakage pipe section according to the average delay time and the signal propagation rate so as to realize the accurate positioning of the leakage point.
Preferably, the first processing module includes:
a first extraction unit, configured to extract the vibration signal curves of the pipe segment inlet and the pipe segment outlet of the leaking pipe segment in a preset time period from the signal curve database by using the current time as a time node according to the leakage determination result;
the first processing unit is connected with the first extraction unit and used for calculating the minimum delay between the signal transient moments of the vibration signal curve at the pipe section inlet and the vibration signal curve at the pipe section outlet caused by leakage points to obtain a first delay time;
a second extraction unit, configured to extract the acoustic signal curves of the pipe segment inlet and the pipe segment outlet of the leaking pipe segment in a preset time period from the signal curve database by using the current time as a time node according to the leakage determination result;
the second processing unit is connected with the second extraction unit and used for calculating the minimum delay between the signal transient moments of the sound wave signal curve at the pipe section inlet and the sound wave signal curve at the pipe section outlet caused by leakage points to obtain second delay time;
and the third processing unit is respectively connected with the first processing unit and the second processing unit and is used for calculating the average value of the first delay time and the second delay time to obtain the average delay time between signal transient moments caused by leakage points in the leakage pipe section.
Preferably, the first delay time is calculated by using an LMS adaptive algorithm.
Preferably, the second delay time is calculated by using an LMS adaptive algorithm.
Preferably, the property parameters include pipe diameter, pipe material and pipe length of the pipe section.
Preferably, the third processing module specifically includes:
the fourth processing unit is used for calculating a first distance between the leakage point of the leakage pipe section and the pipe section inlet of the leakage pipe section according to the average delay time and the acoustic signal propagation rate;
and the fifth processing unit is connected with the fourth processing unit and used for calculating the second distance between the leakage point and the pipe section outlet of the leakage pipe section according to the first distance and the pipe length of the leakage pipe section.
Preferably, the leakage monitoring system further comprises a positioning display module connected to the third processing module and used for displaying the leakage points on a geographic information system of the underground pipe network in real time according to the first distance and the second distance.
Preferably, the first distance is calculated by the following formula:
wherein,
L1representing the first distance;
l represents the length of the leaking pipe section;
v represents the acoustic signal propagation rate;
Preferably, the second distance is calculated by the following formula:
wherein,
L2representing the first distance;
l represents the length of the leaking pipe section;
v represents the acoustic signal propagation rate;
The technical scheme has the following advantages or beneficial effects: the time delay mean value obtained by vibration signal detection and sound wave signal detection is used as the time delay of leakage point positioning, so that the time delay error caused by single vibration signal detection and single sound wave signal detection is corrected, and the accuracy of leakage point positioning is effectively improved.
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FIG. 1 is a schematic diagram of a system for accurately locating a water leakage point of an underground water pipe according to a preferred embodiment of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present invention is not limited to the embodiment, and other embodiments may be included in the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems in the prior art, there is provided a system for accurately positioning a water leakage point of an underground water pipe, as shown in fig. 1, which specifically includes:
the flow sensor 11 is used for detecting real-time water flow of the inlet and the outlet of the pipe section in real time;
the vibration sensor 12 is used for detecting real-time vibration signals of the pipe section inlet and the pipe section outlet in real time;
the acoustic wave sensor 13 is used for detecting real-time acoustic wave signals of the pipe section inlet and the pipe section outlet in real time;
the curve generation module 2 is connected with the data acquisition module 1, and the curve generation module 2 comprises:
the first generating unit 21 is used for generating a corresponding vibration signal curve according to each real-time vibration signal;
the second generating unit 22 is used for generating a corresponding sound wave signal curve according to each real-time sound wave signal;
the first storage module 3 is connected with the curve generation module 2 and used for storing the vibration signal curve and the sound wave signal curve to form a signal curve database;
the leakage judging module 4 is connected with the data acquisition module 1 and used for calculating a flow difference value between a pipe section inlet and a pipe section outlet of each pipe section according to the real-time water flow and outputting a leakage judging result indicating that the corresponding pipe section is a leakage pipe section when the flow difference value is greater than a preset flow threshold value;
the first processing module 5 is respectively connected with the first storage module 3 and the leakage judging module 4 and is used for processing to obtain the average delay time between the transient moments of signals between the pipe section inlet and the pipe section outlet caused by leakage points in a leakage pipe section according to the leakage judging result, the vibration signal curve and the sound wave signal curve of the pipe section inlet of the leakage pipe section and the vibration signal curve and the sound wave signal curve of the pipe section outlet of the leakage pipe section;
the second storage module 6 is used for storing a corresponding relation table between the attribute parameters of each pipe section of the underground water pipe and the propagation rate of the sound wave signals;
the second processing module 7 is respectively connected with the leakage judging module 4 and the second storage module 6, and is used for matching in the corresponding relation table according to the leakage judging result and the attribute parameters of the leakage pipe section to obtain the matched acoustic signal propagation rate;
and the third processing module 8 is respectively connected with the first processing module 5 and the second processing module 7, and is used for respectively calculating the distance between the leakage point of the leakage pipe section and the pipe section inlet and the pipe section outlet of the leakage pipe section according to the average delay time and the acoustic signal propagation rate so as to realize the accurate positioning of the leakage point.
Specifically, in this embodiment, when a sudden leak occurs at a certain point on the pipe section of the underground water pipe, sound waves are generated at the leak due to water leakage and propagate in a sinusoidal manner to both sides of the pipe section, and cause vibration of the pipe. In the present application, therefore, accurate positioning of the leak is achieved by sensing both vibration and acoustic signals at the inlet and outlet of the spool piece. The time delay error caused by external vibration during single vibration signal detection is effectively eliminated, and the time delay error caused by noise signals during single sound wave signal detection is eliminated.
In this embodiment, it is first determined whether there is a leak in each pipe segment according to the flow difference of the real-time water flow between the pipe segment inlet and the pipe segment outlet of the pipe segment, and since the real-time water flow of the pipe segment inlet and the pipe segment outlet is fluctuated due to different usage amounts in different time periods of each pipe segment, but when there is no leak in the pipe segment, the flow difference between the pipe segment inlet and the pipe segment outlet tends to be stable, a flow threshold value may be set, and when the detected flow difference of the water flow of the pipe segment inlet and the pipe segment outlet is greater than the flow threshold value, it is determined that there is a leak in the pipe segment, that is, the.
After the leaking pipe section is identified, the leaking point of the leaking pipe section needs to be further positioned. In this embodiment, the current time is taken as a time node, that is, the time when the pipe section is determined to be the leakage pipe section is taken as the time node, and the vibration signal curve and the acoustic wave signal curve at the preset time end before the time node are respectively extracted for analysis, so that the data computation amount is effectively reduced, and the extraction of signal transient caused by external interference factors is avoided, and the final analysis result is influenced.
Due to the difference between the distance between the leakage point and the distance between the pipe section inlet and the pipe section outlet, the time for the vibration signal and the sound wave signal caused by the leakage point to reach the pipe section inlet and the pipe section outlet is inconsistent, namely, the time delay exists. Therefore, after a vibration signal curve of the pipe section inlet and a vibration signal curve of the pipe section outlet are extracted, the two vibration signal curves are compared to determine a signal transient moment caused by a leakage point in the two vibration signal curves, and the time delay between the signal transient moments of the two vibration signal curves can represent the time difference of the vibration signals reaching the pipe section inlet and the pipe section outlet. And in the same way, the minimum delay of the two sound wave signal curves is recorded as a second delay time, and the average value of the first delay time and the second delay time is used as the average delay time of the leakage point of the leakage pipe section.
Furthermore, due to the fact that the propagation rates of the sound wave signals in the pipe sections are different due to the fact that the attribute parameters of the pipe sections are different, corresponding relation tables are generated through the corresponding relations between the attribute parameters of the pipe sections of the underground water pipe and the propagation rates of the sound wave signals and stored in advance, after the average delay time of the leaking pipe sections is obtained through calculation, the propagation rates of the sound wave signals corresponding to the attribute parameters of the leaking pipe sections are searched in the corresponding relation tables, then the first distance between the leaking point and the pipe section inlet and the second distance between the leaking point and the pipe section outlet can be obtained according to the average delay time and the propagation rates of the sound wave signals, and accurate positioning of the leaking point is achieved.
In a preferred embodiment of the present invention, the first processing module 5 comprises:
a first extraction unit 51, configured to extract, from the signal curve database, a vibration signal curve of a pipe segment inlet and a vibration signal curve of a pipe segment outlet of a leaking pipe segment in a preset time period, with a current time as a time node according to a leakage determination result;
the first processing unit 52 is connected with the first extraction unit 51 and used for calculating the minimum delay between the transient moments of the signals of the vibration signal curve of the pipe section inlet and the vibration signal curve of the pipe section outlet caused by leakage points to obtain a first delay time;
a second extraction unit 53, configured to extract, from the signal curve database, a sound wave signal curve of a pipe segment inlet and a sound wave signal curve of a pipe segment outlet of the leaking pipe segment in a preset time period, with the current time as a time node according to the leak determination result;
the second processing unit 54 is connected with the second extraction unit 53 and used for calculating the minimum delay between the signal transient moments of the sound wave signal curve at the pipe section inlet and the sound wave signal curve at the pipe section outlet caused by leakage points to obtain a second delay time;
and a third processing unit 55, connected to the first processing unit 52 and the second processing unit 54, respectively, for calculating an average of the first delay time and the second delay time to obtain an average delay time between signal transient moments due to a leak in the leaking pipe section.
In the preferred embodiment of the present invention, the first delay time is calculated by using an LMS adaptive algorithm.
In a preferred embodiment of the present invention, the second delay time is calculated by using an LMS adaptive algorithm.
In a preferred embodiment of the invention, the property parameters comprise pipe diameter, tubing and pipe length of the pipe section.
In a preferred embodiment of the present invention, the third processing module 8 specifically includes:
the fourth processing unit 81 is configured to calculate a first distance between a leakage point of the leakage pipe section and a pipe section inlet of the leakage pipe section according to the average delay time and the acoustic signal propagation rate;
and the fifth processing unit 82 is connected to the fourth processing unit 81 and is configured to calculate a second distance between the leakage point and the pipe section outlet of the leaking pipe section according to the pipe length of the first distance leaking pipe section.
In a preferred embodiment of the present invention, the system further comprises a positioning display module 9 connected to the third processing module 8, and configured to display the leakage points in real time on the geographic information system of the underground pipe network according to the first distance and the second distance.
In a preferred embodiment of the present invention, the first distance is calculated by using the following formula:
wherein,
L1representing a first distance;
l represents the length of the leaking pipe section;
v represents the acoustic signal propagation rate;
In a preferred embodiment of the present invention, the second distance is calculated by using the following formula:
wherein,
L2representing a first distance;
l represents the length of the leaking pipe section;
v represents the acoustic signal propagation rate;
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a system for accurate positioning underground water pipe water leakage point which characterized in that specifically includes:
the data acquisition module sets up respectively in the pipeline section entry and the pipeline section exit of each pipeline section of underground water pipe, the data acquisition module specifically includes:
the flow sensor is used for detecting real-time water flow of the pipe section inlet and the pipe section outlet in real time;
the vibration sensor is used for detecting real-time vibration signals of the pipe section inlet and the pipe section outlet in real time;
the acoustic wave sensor is used for detecting real-time acoustic wave signals of the pipe section inlet and the pipe section outlet in real time;
the curve generation module is connected with the data acquisition module and comprises:
the first generating unit is used for generating a corresponding vibration signal curve according to each real-time vibration signal;
the second generating unit is used for generating a corresponding sound wave signal curve according to each real-time sound wave signal;
the first storage module is connected with the curve generation module and used for storing the vibration signal curve and the sound wave signal curve to form a signal curve database;
the leakage judging module is connected with the data acquisition module and used for calculating a flow difference value between the pipe section inlet and the pipe section outlet of each pipe section according to the real-time water flow and outputting a leakage judging result indicating that the corresponding pipe section is a leakage pipe section when the flow difference value is greater than a preset flow threshold value;
the first processing module is respectively connected with the first storage module and the leakage judging module and used for processing to obtain the average delay time between signal transient moments between the pipe section inlet and the pipe section outlet caused by a leakage point in the leakage pipe section according to the leakage judging result, the vibration signal curve and the sound wave signal curve of the pipe section inlet of the leakage pipe section and the vibration signal curve and the sound wave signal curve of the pipe section outlet of the leakage pipe section;
the second storage module is used for storing a corresponding relation table between the attribute parameters of each pipe section of the underground water pipe and the propagation rate of the sound wave signals;
the second processing module is respectively connected with the leakage judging module and the second storage module and is used for matching in the corresponding relation table according to the leakage judging result and the attribute parameters of the leakage pipe section to obtain the matched acoustic signal propagation rate;
and the third processing module is respectively connected with the first processing module and the second processing module and is used for respectively calculating the distance between the leakage point of the leakage pipe section and the pipe section inlet and the pipe section outlet of the leakage pipe section according to the average delay time and the acoustic signal propagation rate so as to realize the accurate positioning of the leakage point.
2. The system for accurately locating the water leakage point of the underground water pipe according to claim 1, wherein the first processing module comprises:
a first extraction unit, configured to extract the vibration signal curves of the pipe segment inlet and the pipe segment outlet of the leaking pipe segment in a preset time period from the signal curve database by using the current time as a time node according to the leakage determination result;
the first processing unit is connected with the first extraction unit and used for calculating the minimum delay between the signal transient moments of the vibration signal curve at the pipe section inlet and the vibration signal curve at the pipe section outlet caused by leakage points to obtain a first delay time;
a second extraction unit, configured to extract the acoustic signal curves of the pipe segment inlet and the pipe segment outlet of the leaking pipe segment in a preset time period from the signal curve database by using the current time as a time node according to the leakage determination result;
the second processing unit is connected with the second extraction unit and used for calculating the minimum delay between the signal transient moments of the sound wave signal curve at the pipe section inlet and the sound wave signal curve at the pipe section outlet caused by leakage points to obtain second delay time;
and the third processing unit is respectively connected with the first processing unit and the second processing unit and is used for calculating the average value of the first delay time and the second delay time to obtain the average delay time between signal transient moments caused by leakage points in the leakage pipe section.
3. The system for accurately locating the water leakage point of the underground water pipe as claimed in claim 2, wherein the first delay time is calculated by using an LMS adaptive algorithm.
4. The system for accurately locating the water leakage point of the underground water pipe as claimed in claim 2, wherein the second delay time is calculated by using an LMS adaptive algorithm.
5. The system for accurately locating the water leakage point of an underground water pipe according to claim 1, wherein the property parameters include the pipe diameter, the pipe material and the pipe length of the pipe section.
6. The system for accurately positioning the water leakage point of the underground water pipe according to claim 1, wherein the third processing module specifically comprises:
the fourth processing unit is used for calculating a first distance between the leakage point of the leakage pipe section and the pipe section inlet of the leakage pipe section according to the average delay time and the acoustic signal propagation rate;
and the fifth processing unit is connected with the fourth processing unit and used for calculating the second distance between the leakage point and the pipe section outlet of the leakage pipe section according to the first distance and the pipe length of the leakage pipe section.
7. The system of claim 6, further comprising a location display module, connected to the third processing module, for displaying the leakage point in real time on the geographic information system of the underground pipe network according to the first distance and the second distance.
8. The system for accurately locating the water leakage point of the underground water pipe according to claim 6, wherein the first distance is calculated by the following formula:
wherein,
L1representing the first distance;
l represents the length of the leaking pipe section;
v represents the acoustic signal propagation rate;
9. The system of claim 6, wherein the second distance is calculated using the following formula:
wherein,
L2representing the first distance;
l represents the length of the leaking pipe section;
v represents the acoustic signal propagation rate;
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