阅读说明：本技术 一种地下管网泄露位置确定方法及系统 (Underground pipe network leakage position determination method and system ) 是由 秦克华 王海龙 于海亮 娄志会 李玲 田旭 袁友 景利帆 于 2020-05-16 设计创作，主要内容包括：本发明涉及一种地下管网泄露位置确定方法及系统,属于地下管网泄露位置检测的技术领域,用于提高地下管网泄露位置确定的速度和准确度,该方法和系统均能够对图像采集终端和泄露测试终端本身的位置进行较为精确的获取,通过本身位置较为精确的图像采集终端快速获取热分布图像信息以快速获取泄露位置可能处于的区域,再通过本身位置较为精确的泄露测试终端在上述区域内确定泄露位置,提高了泄露位置确定的速度,保持了较高的泄露位置准确度。(The invention relates to a method and a system for determining leakage positions of an underground pipe network, belongs to the technical field of detection of the leakage positions of the underground pipe network, and is used for improving the speed and the accuracy of determining the leakage positions of the underground pipe network.)

1. A method for determining leakage positions of an underground pipe network relates to information interaction between a control center and an image acquisition terminal and between a control center and a leakage test terminal, and is characterized by comprising the following steps:

the control center acquires the distribution image information of the underground pipe network;

the control center acquires real-time position information of the image acquisition terminal and the leakage test terminal;

the control center acquires heat distribution image information sent by the image acquisition terminal;

the control center generates suspicious position information according to the heat distribution image information and sends the suspicious position information to the leakage test terminal;

and the control center receives the test result information sent by the leakage test terminal and generates leakage position information according to the test result information.

2. The method for determining the leakage position of the underground pipe network according to claim 1, wherein the step of acquiring the real-time position information of the image acquisition terminal or the leakage test terminal by the control center specifically comprises the following steps:

the control center sends position acquisition control information to the image acquisition terminal or the leakage test terminal;

receiving position image information fed back by the image acquisition terminal or the leakage test terminal;

and generating the real-time position information according to the position image information and the distribution image information.

3. The method for determining the leakage position of the underground pipe network according to claim 2, wherein the step of generating the real-time position information according to the position image information and the distribution image information specifically comprises the following steps: comparing the scenery information contained in the position image information with the scenery information contained in the distribution image information, and determining the position of the position image information in the distribution image information to generate the real-time position information.

4. The method for determining the leakage position of the underground pipe network according to claim 1, wherein the step of acquiring the heat distribution image information sent by the image acquisition terminal by the control center specifically comprises the following steps:

the control center acquires image acquisition control information according to the distribution image information;

sending the image acquisition control information to the image acquisition terminal;

receiving the thermal distribution image information fed back by the image acquisition terminal

And sending image acquisition control information to the image acquisition terminal and receiving heat distribution image information fed back by the image acquisition terminal.

5. The method for determining the leakage position of the underground pipe network according to claim 4, wherein the step of acquiring the image acquisition control information by the control center according to the distribution image information specifically comprises the following steps:

the control center acquires a plurality of large probability leakage points according to the distribution image information;

generating a large probability shooting range unit according to the large probability leakage points;

sorting the approximate probability shooting range units according to the number of the approximate probability leakage points in the approximate probability shooting range units;

generating a remaining shooting range unit from the large probability shooting range unit and ranking the remaining shooting range units after the large probability setting range unit.

6. The method for determining the leakage position of the underground pipe network according to claim 1, wherein the step of generating suspicious position information according to the thermal distribution image information specifically comprises the following steps:

generating a predicted thermal distribution image according to the distribution image information;

superposing the thermal distribution image information on distribution image information to generate an actual thermal distribution image;

comparing the actual heat distribution image with a predicted heat distribution image to generate heat deviation area information;

and generating the suspicious position information according to the thermal deviation area information.

7. The method of claim 1, wherein the step of superimposing the thermal distribution image on the distribution image information to generate an actual thermal distribution image specifically comprises the steps of:

superimposing the thermal distribution image information to the distribution image information;

judging whether the thermal distribution image information is overlapped or not;

if yes, image processing is carried out on the thermal distribution image information of the superposed part.

8. The method for determining the leakage position of the underground pipe network according to claim 7, wherein the image processing of the thermal distribution image information of the superimposed portion is specifically:

processing the heat distribution image of the superposed part by adopting an image fusion technology;

or replace existing thermal distribution image information with the received thermal distribution image information.

9. An underground pipe network leakage location determination system, comprising a control center, characterized in that the control center comprises:

the distribution image acquisition module is used for acquiring distribution image information of the underground pipe network;

the real-time position acquisition module is used for acquiring real-time position information of the image acquisition terminal and the leakage test terminal;

the thermal distribution acquisition module is used for acquiring thermal distribution image information sent by the image acquisition terminal;

the suspicious position generating module is used for generating suspicious position information according to the heat distribution image information;

and the leakage position generating module is used for generating leakage position information according to the test result information.

Technical Field

The invention relates to the technical field of underground pipe network leakage position detection, in particular to an underground pipe network leakage position determining method and system.

Background

The underground pipe network is a network formed by urban underground pipelines, and generally refers to pipelines and accessories thereof for water supply, drainage, gas, heat, power, concentricity, broadcast television, industry and the like in a specified range, and the underground pipe network refers to underground pipelines for conveying fluid. Because the pipeline is buried underground and is easily corroded by the underground environment to be damaged, when the pipeline is damaged and leaks, the pipeline leakage position cannot be visually observed and obtained, and subsequent pipeline maintenance work is influenced.

In order to facilitate the determination of the leakage position of the underground pipe network, various mature modes are provided in the prior art.

One mode is that a worker detects the leakage of a pipeline by adopting 'seeing, hearing and touching' or adopting a single device such as a leakage detector and a temperature detector, and the detection result is more accurate, but the detection result is greatly influenced by human factors and environmental factors, and the efficiency is lower;

the other mode is to adopt a thermal infrared imaging technology to collect thermal infrared images of the surface of the area where the underground pipe network is located, the detection process of the mode is more convenient and the detection is quicker, but the detection result is easy to have errors.

As the leakage of the underground pipe network easily causes great cost waste, how to efficiently, quickly and accurately determine the leakage position of the underground pipe network, timely maintain the leakage part and reduce the cost waste as much as possible always needs to be solved by technical personnel in the field.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the method for determining the leakage position of the underground pipe network, which has the advantage that the leakage position of the underground pipe network can be determined quickly and accurately.

The above object of the present invention is achieved by the following technical solutions:

a method for determining leakage positions of an underground pipe network relates to information interaction between a control center and an image acquisition terminal and between a control center and a leakage test terminal, and comprises the following steps:

the control center acquires the distribution image information of the underground pipe network;

the control center acquires real-time position information of the image acquisition terminal and the leakage test terminal;

the control center acquires heat distribution image information sent by the image acquisition terminal;

the control center generates suspicious position information according to the heat distribution image information and sends the suspicious position information to the leakage test terminal;

and the control center receives the test result information sent by the leakage test terminal and generates leakage position information according to the test result information.

By adopting the technical scheme, the positions of the image acquisition terminal and the leakage test terminal in the distribution image information can be determined accurately, the control center can generate suspicious position information by analyzing the heat distribution image information sent by the image acquisition terminal, the position where leakage is possible can be determined directly and quickly, and whether the suspicious position is the leakage position or not is judged by the test result information sent by the leakage test terminal, namely, the leakage position is determined accurately and accurately, so that the leakage position of the underground pipe network can be determined quickly and accurately based on accurate starting.

In a preferred example of the present invention, the step of acquiring the real-time location information of the image capturing terminal or the leakage testing terminal by the control center specifically includes the following steps:

the control center sends position acquisition control information to the image acquisition terminal or the leakage test terminal;

receiving position image information fed back by the image acquisition terminal or the leakage test terminal;

and generating the real-time position information according to the position image information and the distribution image information.

In a preferred example, the generating the real-time location information according to the location image information and the distribution image information may further include: comparing the scenery information contained in the position image information with the scenery information contained in the distribution image information, and determining the position of the position image information in the distribution image information to generate the real-time position information.

In a preferred example of the present invention, the step of acquiring, by the control center, the thermal distribution image information sent by the image capturing terminal specifically includes the following steps:

the control center acquires image acquisition control information according to the distribution image information;

sending the image acquisition control information to the image acquisition terminal;

receiving the thermal distribution image information fed back by the image acquisition terminal

And sending image acquisition control information to the image acquisition terminal and receiving heat distribution image information fed back by the image acquisition terminal.

In a preferred example of the present invention, the step of acquiring, by the control center, the image acquisition control information according to the distribution image information may specifically include the following steps:

the control center acquires a plurality of large probability leakage points according to the distribution image information;

generating a large probability shooting range unit according to the large probability leakage points;

sorting the approximate probability shooting range units according to the number of the approximate probability leakage points in the approximate probability shooting range units;

generating a remaining shooting range unit from the large probability shooting range unit and ranking the remaining shooting range units after the large probability setting range unit.

The present invention in a preferred example may be further configured that generating suspicious location information from the thermal distribution image information specifically includes the following steps:

generating a predicted thermal distribution image according to the distribution image information;

superposing the thermal distribution image information on distribution image information to generate an actual thermal distribution image;

comparing the actual heat distribution image with a predicted heat distribution image to generate heat deviation area information;

and generating the suspicious position information according to the thermal deviation area information.

The present invention in a preferred example may be further configured that the step of superimposing the thermal distribution image on the distribution image information to generate the actual thermal distribution image specifically comprises the steps of:

superimposing the thermal distribution image information to the distribution image information;

judging whether the thermal distribution image information is overlapped or not;

if yes, image processing is carried out on the thermal distribution image information of the superposed part.

In a preferred example, the present invention may be further configured such that the image processing on the thermal distribution image information of the superimposed portion specifically includes:

processing the heat distribution image of the superposed part by adopting an image fusion technology;

or replace existing thermal distribution image information with the received thermal distribution image information.

The invention aims to provide a system for determining the leakage position of the underground pipe network, which has the advantage that the leakage position of the underground pipe network can be determined quickly and accurately.

The above object of the present invention is achieved by the following technical means:

a system for determining a location of an underground pipe network leak, comprising a control center, the control center comprising:

the distribution image acquisition module is used for acquiring distribution image information of the underground pipe network;

the real-time position acquisition module is used for acquiring real-time position information of the image acquisition terminal and the leakage test terminal;

the thermal distribution acquisition module is used for acquiring thermal distribution image information sent by the image acquisition terminal;

the suspicious position generating module is used for generating suspicious position information according to the heat distribution image information;

and the leakage position generating module is used for generating leakage position information according to the test result information.

By adopting the technical scheme, the positions of the image acquisition terminal and the leakage test terminal in the distribution image information can be determined accurately, the control center can generate suspicious position information by analyzing the heat distribution image information sent by the image acquisition terminal, the position where leakage is possible can be determined directly and quickly, and whether the suspicious position is the leakage position or not is judged by the test result information sent by the leakage test terminal, namely, the leakage position is determined accurately and accurately, so that the leakage position of the underground pipe network can be determined quickly and accurately based on accurate starting.

In summary, the invention includes at least one of the following beneficial technical effects:

1. the method and the system can accurately acquire the real-time positions of an image acquisition terminal and a leakage test terminal, quickly determine suspicious position information through heat distribution image information sent by the image acquisition terminal, and accurately determine the leakage position information through the leakage test terminal, so that the leakage position of the underground pipe network can be quickly and accurately determined based on accurate starting;

2. the mode of determining suspicious position information by comparing the thermal distribution image information with the predicted thermal distribution image to generate thermal deviation area information is efficient and rapid.

Drawings

FIG. 1 is a schematic flow diagram of an exemplary method of the present invention;

fig. 2 is a flowchart illustrating an exemplary method for generating suspicious location information based on thermal distribution image information according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a method for determining a leakage position of an underground pipe network relates to information interaction between a control center and an image acquisition terminal and between a control center and a leakage test terminal.

An underground pipe network is a pipeline which is buried in the underground for conveying fluid in a designated area, such as a city heat supply pipeline.

The image acquisition terminal is a device for acquiring thermal infrared image information by adopting a thermal infrared imaging technology. In an example, the image acquisition terminal sets up to carry out the unmanned aerial vehicle that carries hot infrared camera, and hot infrared camera sets up in unmanned aerial vehicle's below and the vertical downwards of shooting direction, adopts hot infrared camera to take photo by plane to the specified area through operating unmanned aerial vehicle and can acquire the hot infrared image in specified area.

The leakage test terminal is a device for acquiring underground noise by adopting a listening technology. In one example, the leakage test terminal is a ground-based robot carrying a pipe network leakage test machine, the ground-based robot is provided with a mechanical arm, a test end of the pipe network leakage test machine is fixed at the end of the mechanical arm, and the test end of the pipe network leakage test machine can be controlled to be close to the ground and perform listening test work or be far away from the ground without affecting the normal walking of the ground-based robot by controlling the action of the mechanical arm. It should be noted that, in order to avoid the operation noise of the ground-based robot from affecting the listening test result, other parts of the ground-based robot generally need to be stopped during the listening test.

The control center is in real-time communication connection with the image acquisition terminal and the leakage test terminal, and has the functions of receiving and processing information sent by the image acquisition terminal and the leakage test terminal and controlling the image acquisition terminal and the leakage test terminal to act.

Certainly, in order to facilitate the control center to accurately control the image acquisition terminal and the leakage test terminal, a position determination module is generally adopted to arrange the control center, the image acquisition terminal and the leakage test terminal in the same position determination subsystem, and the image acquisition terminal and the leakage test terminal are internally provided with inertia elements capable of determining the movement trend of the image acquisition terminal and the leakage test terminal, so that the control center can acquire the accurate position of the image acquisition terminal and the leakage test terminal and control the accurate position movement of the image acquisition terminal and the leakage test terminal.

In one example, the position determining subsystem is set as an indoor positioning module, the designated area is rectangular, a plurality of datum points of the indoor positioning module are arranged at designated position points of the rectangular designated area, if the datum points are in a rectangular array shape and are fully distributed in the designated area, the control center and the image acquisition terminal are both located in the designated area, so that the positions of the control center, the image acquisition terminal and the leakage test terminal can be determined accurately, and the control center can conveniently acquire the accurate positions of the image acquisition terminal and the leakage test terminal and control the accurate position movement of the image acquisition terminal and the leakage test terminal.

The method comprises the following steps which are carried out in sequence:

s101: and storing the distribution image information of the underground pipe network to a control center.

The distribution image information of the underground pipe network comprises the regional image information of the designated region of the underground pipe network and the pipeline distribution information of the underground pipe network distributed in the designated region, and can display the information of the position, the trend, the burying depth and the like of all pipelines of the underground pipe network in the designated region or the information of the burying depth, the burying duration, the equipment functions/parameters/models and the like of pipe network equipment.

The control center itself has a basic information storage function, so the specific means for storing the distribution image information to the control center can be specific conventional means such as information copying, information transmission, information transfer and the like, and will not be described herein.

S102: and the control center acquires real-time position information of the image acquisition terminal and the leakage test terminal.

The real-time position information of the image acquisition terminal and the leakage test terminal, namely the real-time positions of the image acquisition terminal and the leakage test terminal in the designated area is a three-dimensional space position, and the image acquisition terminal and the leakage test terminal are tools for the control center to acquire the designated position or the area information, so that when the control center controls the image acquisition terminal and the leakage test terminal to move to the designated position to carry out work needing to be carried out, the smaller the deviation between the actual position to which the image acquisition terminal and the leakage test terminal move and the designated position is, the smaller the influence on the work result is, and the accuracy of the pipe network leakage position result is improved.

In one example, the image acquisition terminal is provided with a high-definition camera with a vertically downward shooting direction, the control center controls the image acquisition terminal to move to a plurality of position determination points in sequence, shoots position image information of each position determination point when the image acquisition terminal moves to the position determination point, and then compares the position image information with a scene in the area image information, so as to determine real-time position information of the image acquisition terminal at the position determination point in a specified area. To improve the accuracy of the real-time location information, the number of general location determination points is not less than three, and preferably five in this example.

The specific way of determining the real-time location information of the leakage test terminal in the designated area is consistent with the process of determining the real-time location information of the image acquisition terminal, and is not repeated.

The position image information of the plurality of position determination points is acquired and compared with the region image information, the real-time position information of the image acquisition terminal and the leakage position terminal in the designated region is acquired, and the accuracy of the real-time position information is further improved, so that the accuracy of the working positions of the image acquisition terminal and the leakage test terminal is improved, and the accuracy of the position result of the pipe network leakage is further improved.

S103: the image acquisition terminal acquires the heat distribution image information of the specified area and sends the heat distribution image information to the control center.

The thermal distribution image information, that is, the thermal distribution of the designated area, is obtained by the thermal infrared camera of the image capture terminal, and the technology of obtaining the thermal infrared image by the image capture terminal equipped with the thermal infrared camera is a basic application mode of the thermal infrared camera and is not described further. It should be noted that the thermal distribution image information in this example refers to thermal distribution image information of the specified area ground surface, and the temperature distribution of the specified area ground surface can be determined by the thermal distribution image information, and the heat source distribution condition under the specified area ground surface can be determined by considering other environmental factors in the area image information.

In an example, the specific way for the image acquisition terminal to acquire the heat distribution image information is that the control center determines a plurality of approximate leakage points according to the area image information and the pipeline distribution information, the approximate leakage points are generally at the pipeline joint, at the pipeline burying time longer/deeper, at the equipment/pipeline power higher/load higher, and the like, then combines the rated setting range of the image acquisition terminal (the larger setting range is kept without affecting the shooting precision), plans a plurality of approximate leakage points allowed by distance in the same shooting range unit so as to generate a plurality of approximate shooting range units, and then the control center controls the image acquisition terminal to sequentially acquire the heat distribution image information of all the approximate shooting range units according to the leakage probability of the approximate shooting range units (the leakage probability increases with the increase of the number of the approximate leakage points in the approximate shooting range unit) The thermal distribution image information is a combined image generated by superimposing a thermal distribution map of the approximate probability setting range on the distribution image information.

Of course, the possible sizes of the pipeline leaks under different conditions can be specified according to preset rules or experience of a person skilled in the art, and when the possible sizes of the leaks of the high-probability leaks are considered to be different, the calculation of the number of the high-probability leaks within the high-probability setting range is calculated in a weighting mode.

After the thermal distribution image information of the large-probability setting range unit is acquired, the control center determines the remaining possible leakage points, namely the pipeline distribution array points which are not shot, according to the regional image information and the pipeline distribution information, and for the remaining possible leakage points, the thermal distribution image information of the positions of the possible leakage points can be acquired by adopting the operation mode of the large-probability leakage points, which is not described in detail.

Further, when the approximate leakage point is determined, the control center may automatically determine the related parameter limits of the pipeline and the equipment, for example, the burying time is longer than the preset duration, the pipeline joints connected with the pipeline with the number larger than the preset number, the equipment power is larger than the preset power, and the like, of course, a function may be formed by two or more related parameters, and the limit of the approximate leakage point is determined by determining the limit of the function.

When the image acquisition terminal acquires an image, in order to reduce the influence of the acquired thermal distribution image information on the action of the image acquisition terminal, the image acquisition terminal is generally suspended for a preset time to acquire the image.

It should be noted that, because the control center interacts with the image acquisition terminal in real time, in the process of acquiring the thermal distribution image information by the image acquisition terminal, the control center can obtain and process the acquired thermal distribution image information, thereby ensuring an efficient processing speed.

S104: and the control center generates suspicious position information according to the heat distribution image information and sends the suspicious position information to the leakage test terminal.

The method specifically comprises the following substeps:

s401: the control center generates a predicted thermal distribution image from the distribution image information.

The predicted heat distribution image is a heat distribution image of a specified area estimated in advance based on the buried depth of the pipelines/facilities of the underground pipe network, the properties of the carrier fluid, the specifications of the pipelines/facilities, and other environmental conditions in combination with the geological conditions, other environmental factors, and the like.

S402: and superposing the thermal distribution image information to the distribution image information to generate an actual thermal distribution image.

The actual heat distribution image is the actual heat distribution of the earth surface of the designated area, and is the comprehensive result formed by superposing the heat distribution image information on the distribution image information. According to the description of step S103, the thermal distribution image information received by the control center is the thermal distribution image information of the unit range, and when the control center receives the thermal distribution image information of a unit range, the thermal distribution image information of the unit range is directly scaled to the corresponding range in the thermal distribution image information, and the matching process between the unit range and the corresponding range may use an image feature comparison technique, and is not described.

Certainly, considering that the heat distribution images in all unit ranges finally need to include pipelines of all underground pipe networks, the heat distribution images are sequentially transmitted to the control unit and are overlapped to the overlapped part where the distribution image information is difficult to avoid, the image overlapped part is generally processed in two modes, one mode is that the heat distribution image information of the overlapped part is fused by adopting an image fusion processing technology, each position point of the heat distribution image displayed by the heat distribution image information of the fused part is an average value of heat collected by the position point twice, and the other mode is that the image overlapped part enables the heat distribution image information received later to cover and replace the heat distribution image information received earlier. The calculation of the average value can reduce the influence of errors of single-time acquisition of heat distribution image information on the determination of the leakage position of the pipe network, and the replacement of the old image by the new image coverage can update the heat distribution image in time, so that the latest heat distribution image information can be obtained.

S403: and comparing the actual heat distribution image with the predicted heat distribution image to generate heat deviation area information.

The thermal deviation region information includes a region where the actual thermal distribution image is expected to have thermal deviation from the thermal distribution image. Specifically, the halation shape formed on the ground surface by a specified pipeline/equipment which is in a specified environmental condition, buried at a specified depth and loaded with a specified fluid can be roughly calculated, a predicted thermal distribution image, that is, a thermal halation shape formed on the ground surface in a specified area by all pipelines/equipment in the underground pipe network, is combined with other environmental conditions to generate a superimposed image, and the actual thermal distribution image, that is, the thermal distribution image information is superimposed on the display result of the distribution image information.

S404: and generating the suspicious position information according to the thermal deviation area information.

The suspicious location information is the possible location of the underground pipe network leakage, and the possible location of the underground pipe network leakage is generally contained in the possible area of the pipe network leakage location. The suspicious location information is a plurality of detection location points specified by the control center on the thermal deviation area information according to a preset rule, the detection location points are preferably the location points with the maximum thermal deviation in the thermal deviation area information containing area, a plurality of detection location points are arranged in one thermal deviation area information containing area according to the area size, and the detection location points in one containing area of the thermal deviation area information are dispersed in the whole containing area by a detection location point array with the maximum thermal deviation.

In one example, the control center sorts all the containing regions according to the magnitude of the thermal deviation in the thermal deviation region information, and then sequentially generates the detection position point of each containing region.

S105: and the leakage test terminal acquires test result information according to the suspicious position information and sends the test result information to the control center.

And the control center controls the leakage test terminal to move to each containing area in the thermal deviation information in sequence, and the detection position points in each containing area are detected in sequence, so that detection result information is generated. The steps of the method are essentially the process that the control center controls the leakage test terminal to carry out the test work related to the functions of the leakage test terminal and the communication process of the leakage test terminal between the control centers, and the leakage test terminal is not developed due to the relatively conventional process.

The leakage test terminal needs to last for a period of time when performing leakage test work, and the time length can be preset or actually adjusted according to needs so as to dynamically acquire the noise of the underground environment relatively comprehensively. Of course, reveal test terminal can also test environmental noise earlier before revealing test work to control center distinguishes the frequency of environmental noise fast, has improved the speed of distinguishing environmental noise and water leakage noise promptly, and then has made things convenient for the quick determination of the position is revealed to the pipe network.

S106: and the control center generates leakage position information according to the test result information.

The test result information is a sound signal collected by the leakage test terminal, and contains environmental noise, water flow sound of an underground pipe network and the like and water leakage sound which may be contained.

Further, after the leakage position information is generated, the control center generates leakage condition information according to the test result information and the leakage position information, the leakage condition information mainly comprises leakage speed, and then the control center acquires pressure changes of a fluid inlet and a fluid outlet of the underground pipe network to verify whether the leakage speed is accurate, so that whether the leakage position information is accurate is verified.

In addition, the leakage test terminal and the image acquisition terminal can be set to be one or more according to actual needs or cost limits, and the specific number is mainly selected in practice. Of course, the fluid in the underground pipe network can also be fluid with lower temperature, such as cold water or normal temperature water, and the leakage of the fluid can also cause the surface of the leakage position to generate thermal deviation, so the scheme is also suitable for the situation.

The implementation principle of the embodiment is as follows: the image acquisition terminal and the leakage test terminal accurately position the positions of the image acquisition terminal and the leakage test terminal in a designated area, then the control center controls the image acquisition terminal to acquire heat distribution image information of an area related to the underground pipe network, compares the acquired heat distribution image information with the distribution image information to determine the area with heat deviation, namely the heat deviation area information, then generates suspicious position information by the heat deviation area information so that the leakage test terminal performs leakage test on a detection position point in the suspicious position information, then judges whether the leakage position is a leakage position according to test result information generated by the test, namely the control center generates leakage position information, and verifies the leakage position information according to the leakage condition information to ensure that the leakage position information is relatively accurate.

The image acquisition terminal and the leakage test terminal are relatively accurate in position in the designated area, so that the control center can conveniently control the accurate positions of the image acquisition terminal and the leakage test terminal, and the whole leakage test process can be ensured to have higher accuracy; firstly, the area where the leakage point is possibly located is determined by comparing thermal distribution images, and then the accurate position of the leakage point is determined by noise analysis, so that the speed of determining the position of the leakage point is increased, and the accuracy of determining the position of the leakage point is also increased; verification of the determined leak point further improves the accuracy of the leak point location determination.