Underground pipeline leakage detection system and method

Abstract

The present invention relates to an underground pipeline leakage detection system and method, belonging to the technical field of pipeline leakage detection. The underground pipeline leakage detection system comprises a detection module and an information processing module; the detection module is used to detect the temperature and humidity of soil above the pipeline in real time, obtain temperature data and humidity data, and upload the temperature data and humidity data to the information processing module; the information processing module is used to set alarm rules, determine the underground pipeline leakage position based on the alarm rules, temperature data and humidity data, and improve the accuracy of pipeline leakage detection.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline leakage detection, and in particular to an underground pipeline leakage detection system and method. Background Art

[0002] Existing water pipelines are mainly laid underground. Due to load vibration, external pressure, internal stress, pipeline aging and construction quality and other reasons, pipelines generally leak after a period of use. According to statistics, the average leakage rate is now as high as over 20%, and the leakage rate has been on a continuous upward trend in recent years. If hot water flows out of the ground, it can be discovered in time, but due to various reasons, water from many leaking points cannot return to the ground and cannot be discovered in time, forming long-term hidden leaks, resulting in a large loss of water resources, causing waste and increasing water supply costs. At the same time, it will also erode the soil and pose a hidden danger to road safety. Therefore, it is urgent to develop a new monitoring system for leak detection in buried pipelines.

[0003] The current leak detection method is generally to check for pipeline leaks based on water volume statistics, pressure detection and acoustic wave detection. In the water volume statistics method, the leakage status of the insulated pipe can be judged based on the statistical analysis results of each node of the water supply network, so as to know the leakage area and conduct a leak inspection. The principle of the pressure detection method is similar to that of the acoustic wave detection method. When a leak occurs, the sound wave is transmitted through the pipe to the nearby valve and at the same time transmitted back to the ground through the soil. Therefore, the acoustic sensor can be used for detection at the valve or on the ground.

[0004] However, water volume statistics and pressure detection both require the use of flow and pressure sensors in the pipe network, and cannot accurately locate the leak point. The acoustic wave detection method can generally only detect leaks when they are relatively large, and is greatly affected by the pipe material. Summary of the invention

[0005] In view of this, it is necessary to provide an underground pipeline leakage detection system and method to solve the technical problems of low timeliness and accuracy of underground pipeline leakage detection.

[0006] In order to solve the above problems, the present invention provides an underground pipeline leakage detection system, which includes a detection module and an information processing module; The detection module is used to detect the temperature and humidity of the soil above the pipeline in real time, obtain temperature data and humidity data, and upload the temperature data and humidity data to the information processing module; The information processing module is used to set alarm rules and determine the leakage location of the underground pipeline based on the alarm rules, temperature data and humidity data.

[0007] In a possible implementation, the detection module includes a buried steel pipe, a sensor unit, and a host unit; The sensor unit and the host unit are built into the buried steel pipe; The sensor unit is used to detect the temperature and humidity of the soil above the pipeline in real time; The host unit is located at the top of the buried steel pipe, and is used to receive the temperature data and humidity data of the sensor unit, and upload the temperature data and humidity data to the information processing module.

[0008] In a possible implementation, the end of the sensor unit is located nine to eleven centimeters above the pipeline.

[0009] In a possible implementation, the sensor unit includes a plurality of temperature and humidity sensors arranged at different positions of the buried steel pipe, wherein the plurality of temperature and humidity sensors include at least a first temperature and humidity sensor, a second temperature and humidity sensor, and a third temperature and humidity sensor; The first temperature and humidity sensor is located at the bottom of the buried steel pipe and is used to detect the temperature and humidity of the soil at the bottom of the buried steel pipe; The second temperature and humidity sensor is located in the middle of the buried steel pipe and is used to detect the temperature and humidity of the soil in the middle of the buried steel pipe; The third temperature and humidity sensor is located on the upper part of the buried steel pipe and is used to detect the temperature and humidity of the soil above the buried steel pipe; The information processing module is specifically used to determine the temperature difference between the bottom soil and the middle soil of the buried steel pipe based on the temperature of the bottom soil and the temperature of the middle soil, and determine the leakage position of the underground pipeline based on the temperature difference.

[0010] In a possible implementation, the host unit includes a signal acquisition circuit, a data upload circuit, and a GPS positioning module; The signal acquisition circuit is used to collect temperature data and humidity data of the sensor unit; The data uploading circuit is used to upload the temperature data and humidity data to the information processing module through the NB-IOT communication method; The GPS positioning module is used to determine the geographical location of the buried steel pipe in the pipe network.

[0011] In a possible implementation, the detection module further includes a power supply unit; The power supply unit is used to supply power to the sensor unit and the host unit.

[0012] In a possible implementation, the power supply unit includes a built-in lithium battery and a solar panel; The built-in lithium battery is used to power the sensor unit and the host unit; The solar panel is used to charge the built-in lithium battery.

[0013] In a possible implementation, the information processing module includes a database unit and a judgment unit; The database unit is used to receive the temperature data and humidity data of the host unit, and build a temperature and humidity database based on the temperature data and humidity data; The judgment unit is used to set an alarm rule and judge the leakage position of the underground pipeline based on the alarm rule, temperature data and humidity data.

[0014] On the other hand, the present invention also provides an underground pipeline leakage detection method, which is implemented by the underground pipeline leakage detection system as described above, and comprises the following steps: Based on the detection module, the temperature and humidity of the soil above the pipeline are detected in real time, the temperature data and the humidity data are obtained, and the temperature data and the humidity data are uploaded to the information processing module; An alarm rule is set based on the information processing module, and a leakage position of the underground pipeline is determined based on the alarm rule, temperature data and humidity data.

[0015] In a possible implementation, the calculation formula of the alarm rule is: , in, For the pipe network The temperature data of the first temperature and humidity sensor of the buried steel pipe, is the average temperature of the first temperature and humidity sensor in the pipe network, For the pipe network The temperature data of the second temperature and humidity sensor of the buried steel pipe, is the average temperature of the second temperature and humidity sensor in the pipe network, For the pipe network The humidity data of the first temperature and humidity sensor of the buried steel pipe, For the pipe network The humidity data of the second temperature and humidity sensor of the buried steel pipe, For the pipe network Humidity data of the third temperature and humidity sensor of a buried steel pipe.

[0016] The beneficial effects of the present invention are as follows: the underground pipeline leakage detection system includes a detection module and an information processing module; the detection module is used to detect the temperature and humidity of the soil above the pipeline in real time, obtain temperature data and humidity data, and upload the temperature data and humidity data to the information processing module; the information processing module is used to set alarm rules, determine the underground pipeline leakage position based on the alarm rules, temperature data and humidity data, and detect the temperature and humidity of the soil above the pipeline in real time through the detection module, thereby improving the timeliness of pipeline leakage detection; through the information processing module processing the data, the underground pipeline leakage position is accurately judged, thereby improving the accuracy of pipeline leakage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of an embodiment of an underground pipeline leakage detection system provided by the present invention; Figure 2 A schematic structural diagram of an embodiment of a detection module of an underground pipeline leakage detection system provided by the present invention; Figure 3 A schematic diagram of the structure of a sensor unit of an underground pipeline leakage detection system provided by the present invention; Figure 4 A schematic diagram of the structure of a host unit of an underground pipeline leakage detection system provided by the present invention; Figure 5 A schematic diagram of the structure of a power supply unit of an underground pipeline leakage detection system provided by the present invention; Figure 6 A schematic diagram of the structure of an embodiment of an information processing module of an underground pipeline leakage detection system provided by the present invention; Figure 7 A schematic diagram of a flow chart of an embodiment of an underground pipeline leakage detection method provided by the present invention; Figure 8 A schematic diagram of the appearance of a monitoring instrument for the underground pipeline leakage detection method provided by the present invention; Fig. 9 A schematic diagram of the appearance of a solar-powered host computer of the underground pipeline leakage detection method provided by the present invention. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0019] The invention discloses an underground pipeline leakage detection system. Figure 1 is a schematic diagram of an underground pipeline leakage detection system provided by an embodiment of the present invention, please refer to Figure 1 , the underground pipeline leakage detection system 100 includes a detection module 110 and an information processing module 120; The detection module 110 is used to detect the temperature and humidity of the soil above the pipeline in real time, obtain temperature data and humidity data, and upload the temperature data and humidity data to the information processing module; The information processing module 120 is used to set alarm rules and determine the leakage location of the underground pipeline based on the alarm rules, temperature data and humidity data.

[0020] Among them, through the joint action of the detection module 110 and the information processing module 120, the temperature and humidity of the soil above the pipeline are detected in real time. After determining the position with the largest temperature change, the humidity is used as auxiliary reference data to determine the leakage point of the pipeline.

[0021] In some embodiments, see Figure 2 , the detection module 110 includes a buried steel pipe 111, a sensor unit 112, and a host unit 113; The sensor unit 112 and the host unit 113 are built into the buried steel pipe 111, wherein the sensor unit is embedded inside the buried steel pipe, and the buried steel pipe is buried inside the soil, so that the buried steel pipe is vertically inserted into the ground, and the end of the sensor unit is located nine to eleven centimeters above the pipe; The sensor unit 112 is used to detect the temperature and humidity of the soil above the pipeline in real time; See also Figure 3 The sensor unit 112 includes a plurality of temperature and humidity sensors arranged at different positions of the buried steel pipe, wherein the plurality of temperature and humidity sensors include at least a first temperature and humidity sensor 1121, a second temperature and humidity sensor 1122, and a third temperature and humidity sensor 1123; The first temperature and humidity sensor 1121 is located at the bottom of the buried steel pipe 111 and is used to detect the temperature and humidity of the soil at the bottom of the buried steel pipe; The second temperature and humidity sensor 1122 is located in the middle of the buried steel pipe 111 and is used to detect the temperature and humidity of the soil in the middle of the buried steel pipe; The third temperature and humidity sensor 1123 is located on the upper part of the buried steel pipe 111 and is used to detect the temperature and humidity of the soil above the buried steel pipe; The information processing module 120 is specifically used to determine the temperature difference between the bottom soil and the middle soil of the buried steel pipe based on the temperature of the bottom soil and the temperature of the middle soil, and determine the leakage position of the underground pipeline based on the temperature difference, wherein the temperature difference of the bottom soil of the buried steel pipe is the difference between the temperature of the bottom soil of the buried steel pipe at the current position and the average temperature of the bottom soil of all the buried steel pipes in the pipeline network, and the temperature difference of the middle soil of the buried steel pipe is the difference between the temperature of the middle soil of the buried steel pipe at the current position and the average temperature of the middle soil of all the buried steel pipes in the pipeline network.

[0022] The host unit 113 is located at the top of the buried steel pipe 111, and is used to receive the temperature data and humidity data of the sensor unit 112, and upload the temperature data and humidity data to the information processing module 120; See also Figure 4 , the host unit 113 includes a signal acquisition circuit 1131, a data upload circuit 1132, and a GPS positioning module 1133; The signal acquisition circuit 1131 is used to collect temperature data and humidity data of the sensor unit 112; The data upload circuit 1132 is used to upload the temperature data and humidity data to the information processing module 120 via NB-IOT communication; The GPS positioning module 1133 is used to determine the geographical location of the buried steel pipe 111 in the pipe network.

[0023] The detection module 110 also includes a power supply unit 114; The power supply unit 114 is used to supply power to the sensor unit 112 and the host unit 113; See also Figure 5 , the power supply unit 114 includes a built-in lithium battery 1141 and a solar panel 1142; The built-in lithium battery 1141 is used to power the sensor unit 112 and the host unit 113; The solar panel 1142 is used to charge the built-in lithium battery 1141 .

[0024] Through the joint action of the buried steel pipe 111, the sensor unit 112, the host unit 113 and the power supply unit 114, the temperature and humidity of the soil above the pipeline are detected in real time, and the temperature and humidity of the soil above the pipeline are uploaded to the information processing module 120, thereby improving the timeliness of pipeline leakage point detection.

[0025] In some embodiments, see Figure 6 , the information processing module 120 includes a database unit 121 and a judgment unit 122; The database unit 121 is used to receive the temperature data and humidity data of the host unit 113, and build a temperature and humidity database based on the temperature data and humidity data; The judgment unit 122 is used to set alarm rules and judge the leakage position of the underground pipeline based on the alarm rules, temperature data and humidity data; By processing the temperature and humidity data through the information processing module, the leakage location of the underground pipeline is determined, thereby improving the accuracy of pipeline leakage detection.

[0026] A specific embodiment of the present invention discloses a method for detecting underground pipeline leakage. Figure 7is a flowchart of the underground pipeline leakage detection method provided by the embodiment of the present invention, please refer to Figure 7 , underground pipeline leak detection methods include: S701, detecting the temperature and humidity of the soil above the pipeline in real time based on the detection module, obtaining temperature data and humidity data, and uploading the temperature data and humidity data to the information processing module; S702: Set alarm rules based on the information processing module, and determine the leakage location of the underground pipeline based on the alarm rules, temperature data, and humidity data.

[0027] Among them, the detection module collects soil temperature and soil moisture at different depths above the underground pipeline, and the temperature data and humidity data are processed by the information processing module, and analyzed and compared with the historical database to determine the leakage area, and then the leakage point is determined according to the GPS positioning component. This method is simple and easy, has little impact on the underground pipeline, and does not require the installation of other instruments and equipment inside the pipeline.

[0028] Compared with the prior art, the underground pipeline leakage detection method provided in this embodiment detects the temperature and humidity of the soil above the pipeline in real time based on the detection module, obtains temperature data and humidity data, and uploads the temperature data and humidity data to the information processing module; improves the timeliness of pipeline leakage detection, sets alarm rules based on the information processing module, determines the underground pipeline leakage location based on the alarm rules, temperature data and humidity data, and improves the accuracy of pipeline leakage detection.

[0029] In some embodiments, in step S701, the temperature and humidity of the soil above the pipeline are detected in real time to obtain temperature data and humidity data. A plurality of temperature and humidity sensors of the sensor unit are embedded in the buried steel pipe. The plurality of temperature and humidity sensors include at least a first temperature and humidity sensor, a second temperature and humidity sensor, and a third temperature and humidity sensor. The buried steel pipe is buried in the soil. After the buried steel pipe is vertically inserted into the ground, the length of the temperature and humidity sensor is adjusted according to the buried depth of the pipeline. The end of the temperature and humidity sensor is located nine to eleven centimeters above the pipeline. The first temperature and humidity sensor is located at the bottom of the buried steel pipe, the second temperature and humidity sensor is located in the middle of the buried steel pipe, and the third temperature and humidity sensor is located at the upper part of the buried steel pipe. The temperature and humidity sensors are connected to the main unit at the top through wires to form a monitor. For a schematic diagram of the appearance of the monitor, please refer to Figure 8 ,like Figure 8As shown, the height of the monitor is 2 meters, with the main unit on the top, temperature and humidity sensor A (the third temperature and humidity sensor) on the upper part, temperature and humidity sensor B (the second temperature and humidity sensor) in the middle, and temperature and humidity sensor C (the first temperature and humidity sensor) on the bottom. The main unit on the top includes a GPS positioning module, and the accuracy of the GPS positioning module is within 10 meters. The main unit uses NB-IOT wide area network communication to exchange data with the information processing module. Its information processing module can be a big data platform with the advantages of multiple nodes, strong signal and low power consumption. The monitor is powered by a built-in lithium battery and charged by solar energy. For the schematic diagram of the solar-powered main unit, please refer to Fig. 9 The pipe network is composed of underground pipes, and a monitor is inserted at a certain distance above the pipes of the pipe network, with priority given to the pipe joints or valve positions. The monitor collects the temperature and humidity of the bottom soil, middle soil and upper soil of the buried steel pipe at regular intervals through the first temperature and humidity sensor, the second temperature and humidity sensor and the third temperature and humidity sensor. After obtaining the temperature data and humidity temperature of the soil at different depths, the temperature data and humidity data are uploaded to the information processing module through the network of the host unit.

[0030] In some embodiments, in step S702, an alarm rule is set, and the location of the underground pipeline leakage is determined based on the alarm rule, temperature data, and humidity data. The temperature data and humidity data of each monitoring instrument are aggregated to form a temperature and humidity database along the pipeline; the detection point data of all underground pipelines are sorted according to the number of the monitoring instrument to obtain the bottom temperature series of the monitoring instrument. And the temperature series in the middle of the monitor ,in Indicates temperature, Indicates the serial number of the monitor. represents the temperature data detected by the temperature and humidity sensor at the bottom, b represents the temperature data detected by the temperature and humidity sensor in the middle, and the soil moisture data at the bottom of the monitor and soil moisture data in the middle of the monitor And soil moisture data on the upper part of the monitor As an auxiliary judgment basis, a temperature and humidity database is constructed based on the upper temperature data, upper humidity data, middle temperature data, middle humidity data, bottom temperature data and bottom humidity data of the monitor, and the bottom average temperature is calculated based on the middle temperature data and bottom temperature data in the temperature and humidity database. , that is, the average temperature of the first temperature and humidity sensor, and the average temperature of the middle , which is the average temperature of the second temperature and humidity sensor; set the alarm rule, and the calculation formula of the alarm rule is: , in, For the pipe network The temperature data of the first temperature and humidity sensor of the buried steel pipe, is the average temperature of the first temperature and humidity sensor in the pipe network, For the pipe network The temperature data of the second temperature and humidity sensor of the buried steel pipe, is the average temperature of the second temperature and humidity sensor in the pipe network, For the pipe network The humidity data of the first temperature and humidity sensor of the buried steel pipe, For the pipe network The humidity data of the second temperature and humidity sensor of the buried steel pipe, For the pipe network Humidity data of the third temperature and humidity sensor of the buried steel pipe; Pipeline network When the difference between the temperature value detected by the first temperature and humidity sensor in the buried steel pipe and the average temperature value detected by all the first temperature and humidity sensors in the historical temperature and humidity database is greater than 5 degrees, and the The difference between the temperature value detected by the second temperature and humidity sensor in the buried steel pipe and the average value of the temperature value detected by the second temperature and humidity sensor in the historical temperature and humidity database is greater than 2 degrees, and the The humidity detected by the first temperature and humidity sensor in the buried steel pipe exceeds 75%. When the humidity detected by the second temperature and humidity sensor in the buried steel pipe exceeds 50%, When the humidity detected by the third temperature and humidity sensor in the buried steel pipe is less than 50%, If the temperature and humidity in the area where the buried steel pipe is located are abnormal, the If a pipeline leak occurs in the area of ​​a buried steel pipe inspection point, the number of monitors can be increased to accurately determine the location of the leak and then push the alarm signal to the maintenance personnel.

[0031] Soil is a poor conductor of heat. When there is a pipeline heat source in it, a radial temperature field with a relatively stable structure will be formed. Once a leak occurs, the temperature field near the leak point will change significantly. Based on this principle, by collecting soil temperatures at different depths above the pipeline and analyzing and comparing them with the historical database, the leak area can be roughly determined and then further accurately located. This method is simple and easy to use, has little impact on existing pipelines, and does not require the installation of other instruments and equipment inside the pipeline. Since the leaked hot water may flow along the surface of the pipeline and in the direction of the pipeline, the soil temperature and humidity in the area around the pipeline will increase. Combined with the radial temperature and humidity data along the pipeline, a comprehensive analysis is performed to find the location with the largest temperature and humidity changes, providing a reference for leak location.

[0032] In summary, the underground pipeline leakage detection system and method provided by the present invention, the underground pipeline leakage detection system includes a detection module and an information processing module; the detection module is used to detect the temperature and humidity of the soil above the pipeline in real time, obtain temperature data and humidity data, and upload the temperature data and humidity data to the information processing module; the information processing module is used to set alarm rules, and determine the underground pipeline leakage location based on the alarm rules, temperature data and humidity data, thereby improving the accuracy of pipeline leakage detection.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. An underground pipeline leakage detection system, characterized in that: It includes a detection module and an information processing module; The detection module is used to detect the temperature and humidity of the soil above the pipeline in real time, obtain temperature data and humidity data, and upload the temperature data and humidity data to the information processing module; The information processing module is used to set alarm rules and determine the leakage location of the underground pipeline based on the alarm rules, temperature data and humidity data.

2. The underground pipeline leakage detection system according to claim 1, characterized in that: The detection module includes a buried steel pipe, a sensor unit, and a host unit; The sensor unit and the host unit are built into the buried steel pipe; The sensor unit is used to detect the temperature and humidity of the soil above the pipeline in real time; The host unit is located at the top of the buried steel pipe, and is used to receive the temperature data and humidity data of the sensor unit, and upload the temperature data and humidity data to the information processing module.

3. The underground pipeline leakage detection system according to claim 2, characterized in that: The end of the sensor unit is located nine to eleven centimeters above the pipe.

4. The underground pipeline leakage detection system according to claim 2, characterized in that: The sensor unit includes a plurality of temperature and humidity sensors arranged at different positions of the buried steel pipe, wherein the plurality of temperature and humidity sensors include at least a first temperature and humidity sensor, a second temperature and humidity sensor, and a third temperature and humidity sensor; The first temperature and humidity sensor is located at the bottom of the buried steel pipe and is used to detect the temperature and humidity of the soil at the bottom of the buried steel pipe; The second temperature and humidity sensor is located in the middle of the buried steel pipe and is used to detect the temperature and humidity of the soil in the middle of the buried steel pipe; The third temperature and humidity sensor is located on the upper part of the buried steel pipe and is used to detect the temperature and humidity of the soil above the buried steel pipe; The information processing module is specifically used to determine the temperature difference between the bottom soil and the middle soil of the buried steel pipe based on the temperature of the bottom soil and the temperature of the middle soil, and determine the leakage position of the underground pipeline based on the temperature difference.

5. The underground pipeline leakage detection system according to claim 2, characterized in that: The host unit includes a signal acquisition circuit, a data upload circuit, and a GPS positioning module; The signal acquisition circuit is used to collect temperature data and humidity data of the sensor unit; The data uploading circuit is used to upload the temperature data and humidity data to the information processing module through the NB-IOT communication method; The GPS positioning module is used to determine the geographical location of the buried steel pipe in the pipe network.

6. The underground pipeline leakage detection system according to claim 2, characterized in that: The detection module also includes a power supply unit; The power supply unit is used to supply power to the sensor unit and the host unit.

7. The underground pipeline leakage detection system according to claim 6, characterized in that: The power supply unit includes a built-in lithium battery and a solar panel; The built-in lithium battery is used to power the sensor unit and the host unit; The solar panel is used to charge the built-in lithium battery.

8. The underground pipeline leakage detection system according to claim 7, characterized in that: The information processing module includes a database unit and a judgment unit; The database unit is used to receive the temperature data and humidity data of the host unit, and build a temperature and humidity database based on the temperature data and humidity data; The judgment unit is used to set an alarm rule and judge the leakage position of the underground pipeline based on the alarm rule, temperature data and humidity data.

9. A method for detecting underground pipeline leakage, characterized in that: The method is implemented by the underground pipeline leakage detection system according to any one of claims 1 to 8, comprising the following steps: Based on the detection module, the temperature and humidity of the soil above the pipeline are detected in real time, the temperature data and the humidity data are obtained, and the temperature data and the humidity data are uploaded to the information processing module; An alarm rule is set based on the information processing module, and a leakage position of the underground pipeline is determined based on the alarm rule, temperature data and humidity data.

10. The underground pipeline leakage detection method according to claim 9, characterized in that: The calculation formula of the alarm rule is: ， in, For the pipe network The temperature data of the first temperature and humidity sensor of the buried steel pipe, is the average temperature of the first temperature and humidity sensor in the pipe network, For the pipe network The temperature data of the second temperature and humidity sensor of the buried steel pipe, is the average temperature of the second temperature and humidity sensor in the pipe network, For the pipe network The humidity data of the first temperature and humidity sensor of the buried steel pipe, For the pipe network The humidity data of the second temperature and humidity sensor of the buried steel pipe, For the pipe network Humidity data of the third temperature and humidity sensor of a buried steel pipe.

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