Pipeline leakage positioning detection method, system, intelligent terminal and storage medium

Abstract

The application relates to a pipeline water leakage positioning detection method and system, an intelligent terminal and a storage medium, and belongs to the technical field of pipeline detection. The method comprises the following steps: acquiring the position of a water leakage quantity detection device and the detected water leakage quantity; screening out a water leakage quantity detection device corresponding to the maximum water leakage quantity, and defining the water leakage quantity detection device corresponding to the maximum water leakage quantity as a center detection device; determining an offset ratio according to the ratio of the water leakage quantities detected by the water leakage quantity detection devices on both sides of the center detection device; acquiring offset information according to the corresponding relationship between the preset offset information and the offset ratio, wherein the offset information comprises offset direction information and offset quantity information relative to the center detection device, generating water leakage point axial position information according to the offset information and the position of the center detection device; and sending the water leakage point axial position information to a background terminal. The application has the effect of being capable of more accurately acquiring the position of a pipeline water leakage point.

Description

Technical Field

[0001] This application relates to the field of pipeline inspection, and in particular to pipeline leak location and detection methods, systems, smart terminals, and storage media. Background Technology

[0002] Currently, people usually use pre-buried pipelines to transport water resources over long distances. When there are sudden changes in temperature or when vehicles run over the road, underground pipelines are prone to cracks or damage, which can cause water to leak from the pipelines.

[0003] In related technologies, the process of detecting pipeline leaks often uses flow meters to calculate the flow difference. That is, flow meters are installed at both the inlet and outlet of the pipeline. When the flow rate at the outlet is less than the flow rate at the inlet, it indicates that the pipeline is leaking.

[0004] Regarding the aforementioned technologies, the inventors discovered that the above-mentioned technical solutions can only detect pipes where water resources are leaking, but cannot accurately detect the specific location of the leak. Even by using multiple flow meters installed inside the pipe, it can only be determined that the leak point is located in a certain section of the pipe, and it is still not possible to accurately locate the leak point. Summary of the Invention

[0005] In order to more accurately locate the source of a pipeline leak, this application provides a pipeline leak location detection method, system, smart terminal, and storage medium.

[0006] Firstly, this application provides any one of the methods for locating pipeline leaks, employing the following technical solution:

[0007] This includes: obtaining the location of the leakage detection device and the amount of leakage detected;

[0008] The leakage detection device corresponding to the maximum leakage volume is selected, and the leakage detection device corresponding to the maximum leakage volume is defined as the central detection device.

[0009] The offset ratio is determined based on the ratio of the leakage detected by the leakage detection devices on both sides of the central detection device.

[0010] The offset information is obtained according to the preset correspondence between offset information and offset ratio. The offset information includes offset direction information and offset amount information relative to the center detector.

[0011] The axial position information of the leak point is generated based on the offset information and the location of the central detection device.

[0012] Send the axial position information of the leak point to the backend terminal.

[0013] By adopting the above technical solution, when a leak occurs at a certain location in the pipeline, the corresponding leakage volume is detected by the leakage detection device, and the central detection device is selected. At the same time, based on the ratio of the leakage volumes detected by the leakage detection devices on both sides of the central detection device, the offset information of the leak point relative to the location of the central detection device is determined, thereby obtaining the axial position information of the pipeline leak point. With the axial position information of the pipeline leak point, the staff can more quickly find the leak point.

[0014] Optionally, a method for further obtaining the location of the leak point based on the axial position information of the leak point is also included, as follows:

[0015] Obtain the inlet flow rate and outlet flow rate of the pipeline. When the inlet flow rate starts to exceed the outlet flow rate, obtain the corresponding node and define it as the leakage start time node. At the same time, obtain the leakage flow rate difference.

[0016] Obtain the time point at which the central detection device detects a leak, and define the time point at which the central detection device detects a leak as the initial detection time point;

[0017] The seepage time value is calculated based on the difference between the time when the leak started and the time when the initial detection was conducted.

[0018] Based on the preset correspondence between the height of the pipeline leak point and the seepage time value, pipeline offset information, and pipeline flow difference, the height of the leak point is obtained;

[0019] Send the height information of the leak point to the backend terminal.

[0020] By adopting the above technical solution, the height of the pipeline leak point can be determined by the seepage time value. Based on the axial position information of the leak point, the staff can further obtain the location information of the pipeline, making it easier for them to find the specific leak point.

[0021] Optionally, steps may also be included before obtaining the axial location information of the leak point, as follows:

[0022] Obtain the inlet flow rate and outlet flow rate of the pipeline;

[0023] Calculate the leakage flow difference of the pipeline based on the difference between the inlet flow rate and the outlet flow rate.

[0024] Obtain the total amount of leakage detected by all detectors;

[0025] Based on the relationship between the total leakage volume and time, a function graph of the total leakage volume versus time value is generated, and the slope K of the gradient line of the corresponding function graph is obtained. The leakage bearing ratio is calculated as: C=K / N, where N is the difference in leakage flow rate.

[0026] Based on the preset correspondence between the height of the leak point and the leak-bearing ratio, the height information of the leak point is obtained;

[0027] Send the height information of the leak point to the backend terminal.

[0028] By adopting the above technical solution, since the leakage bearing ratios corresponding to leakage points at different heights are different, the height information of the pipeline leakage point can be obtained through bearing ratio matching analysis. Simultaneously, because the soil layer absorbs water, but it takes a relatively long time for the soil layer to reach saturation, the rate of increase of the total leakage volume detected by all detectors is not constant during this period. Simply calculating the rate of increase of the total leakage volume detected by all detectors cannot obtain the leakage bearing ratio in a timely and effective manner. Therefore, by performing gradient line slope analysis on the function graph of the total leakage volume versus time value using a computer, the leakage bearing ratio can be fitted more quickly and accurately, thereby obtaining the pipeline leakage height information.

[0029] Optionally, steps may also be included before obtaining the height information of the leak point, as follows:

[0030] Obtain the preceding detection signal and the corresponding preceding detection time node; obtain the following detection signal and the corresponding following detection time node.

[0031] Based on the chronological relationship between the pre-detection and post-detection time nodes, information about the leak point is generated, which includes both pre-detection and post-detection information.

[0032] Send pre- and post-leakage information to the backend terminal.

[0033] By adopting the above technical solution and analyzing the pre-detection and post-detection time nodes, the pre- and post-detection status of the leak can be determined, thereby estimating and determining the final location of the leak.

[0034] Optionally, the process may also include steps following the acquisition of the axial location information of the leak point, as follows:

[0035] Based on the information about the front and rear of the leak point, the height of the leak point, and the axial position of the leak point, the leak point location information is integrated and sent to the back-end terminal and the terminal held by the maintenance personnel.

[0036] By adopting the above technical solution, and by integrating the information before and after the leak point, the height information of the leak point, and the axial position information of the leak point, maintenance personnel can obtain a more accurate and concise location message, making the sending and receiving of information easier and reducing the need for multiple sending and receiving of information.

[0037] Optionally, it also includes a method for obtaining the pre-defined correspondence between pipeline leak point height information and seepage time value, pipeline offset information, and pipeline flow rate difference, as detailed below:

[0038] Obtain information on the dryness of the soil layer;

[0039] Based on the pre-defined correspondence between seepage velocity index information and soil dryness information, the current seepage velocity index information is obtained;

[0040] Based on the preset correspondence between pipeline leak point height information and seepage time value, pipeline offset information, pipeline flow rate difference and seepage velocity index information, obtain the correspondence between pipeline leak point height information and seepage time value, pipeline offset information and pipeline flow rate difference corresponding to the current seepage velocity index information.

[0041] By adopting the above technical solution and combining it with the soil dryness, the seepage velocity index is analyzed, and the correspondence between the pipeline leak height information and the seepage time value, pipeline offset information, and pipeline flow difference is more accurately confirmed, so that the final prediction of the leak height is more accurate.

[0042] Optionally, further methods for obtaining the infiltration velocity index information are also included, as follows:

[0043] Obtain soil information;

[0044] Based on the correspondence between the seepage velocity index information and the soil quality information and soil dryness information, the seepage velocity index corresponding to the current soil quality and the current soil dryness condition is obtained.

[0045] By adopting the above technical solution, taking into account the influence of different soil types on the seepage velocity index, the correspondence between the pipeline leak point height information and the seepage time value, pipeline offset information, and pipeline flow difference value is made more consistent with the current soil environment, thereby making the acquisition of the leak point height more accurate and enabling the pipeline leak location and detection method to be applicable to different soil types.

[0046] Secondly, this application provides a pipeline leakage location and detection system, which adopts the following technical solution:

[0047] Includes: an acquisition module, used to acquire the location of the leakage detection device and the amount of leakage detected;

[0048] The processing module is used to filter out the central detection device based on the leakage volume, determine the offset ratio based on the ratio of the leakage volume on both sides of the central detection device, match the offset information based on the offset ratio, and generate the axial position information of the leakage point based on the offset information and the location of the central detection device.

[0049] The information sending module is used to send the axial position information of the leak point to the back-end terminal;

[0050] Memory, used to store control method programs such as pipe leak location methods;

[0051] A control method that allows a program in the processor and memory to be loaded and executed by the processor, and to implement any one of the methods for locating leaks in a pipeline.

[0052] Thirdly, this application provides a smart terminal, which adopts the following technical solution:

[0053] It includes a memory and a processor, with the memory storing a computer program that can be loaded by the processor and executed to locate any of the pipe leaks.

[0054] Fourthly, this application provides a computer storage medium capable of storing corresponding programs, which facilitates the location and detection of pipeline leaks, and adopts the following technical solution:

[0055] A computer-readable storage medium stores a computer program that can be loaded by a processor and executed as described above for locating and detecting pipe leaks.

[0056] In summary, this application includes at least the following beneficial technical effects:

[0057] 1. By setting up several leak detection devices and determining the central detection device, the axial position information of the pipeline is judged by combining the offset ratio and the offset information, which reduces the workload of staff in checking for leaks.

[0058] 2. By utilizing the relationship between the seepage time value and the height of the leak point, the height of the leak point can be obtained, thereby further estimating and judging the location of the leak point;

[0059] 3. By utilizing the relationship between the leakage bearing ratio and the height of the leakage point, the height of the leakage point can be obtained, thereby further estimating and judging the location of the leakage point. Attached Figure Description

[0060] Figure 1 This is a schematic diagram of the overall structure of the pipe and receiving device in the embodiments of this application.

[0061] Figure 2 This is a flowchart of the method for obtaining the axial position information of the leakage point in the embodiments of this application.

[0062] Figure 3 Side view of the pipe and receiving device in the embodiments of this application.

[0063] Figure 4A flowchart of the method for obtaining the height information of the pipeline leakage point in this application embodiment.

[0064] Figure 5 A flowchart of a method for obtaining the height information of a pipe leak point in another embodiment.

[0065] Explanation of reference numerals in the attached drawings: 1. Receiving device; 11. Receiving mechanism; 111. Receiving plate; 112. Leakage tank; 113. Leakage detection device; 114. Pre-detector; 115. Post-detector; 2. Pipeline. Detailed Implementation

[0066] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-5 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application.

[0067] This application discloses a method for locating and detecting pipeline leaks.

[0068] Reference Figure 1 and Figure 2 Any one of the methods for locating a pipe leak includes:

[0069] S1000: Obtain the location of the leakage detection device and the amount of leakage detected.

[0070] Pipeline 2 is a pre-buried pipe, and a receiving device 1 is pre-buried directly below it. The receiving device 1 includes several receiving mechanisms 11 connected end-to-end, arranged along the length of pipeline 2. Each receiving mechanism 11 includes two receiving plates 111, with a leakage groove 112 between the two plates 111 for catching leaks. The two receiving plates 111 are inclined downwards from the side furthest from the leakage groove 112 to the side closest to it. A soil-retaining plate, made of permeable material, is installed above the leakage groove 112 to cover its opening. Simultaneously, a leakage detection device is installed inside the leakage groove 112. Figure 1 (Not marked in the text).

[0071] When a leak occurs in a part of the pipeline, some of the water inside the pipeline enters the soil through the leak point. Under the influence of osmotic pressure and gravity, the water passes through the soil to the support plate and then flows into the leak trench along the inclined direction of the support plate. The leakage detection device detects the amount of water in the leak trench and sends the leakage data to the back-end terminal.

[0072] Each leakage detection device in the leakage tank has a unique serial number. The back-end terminal can obtain the location of the leakage detection device and the amount of leakage detected by the device based on the serial number.

[0073] S2000: Select the leakage detection device corresponding to the maximum leakage volume and define the leakage detection device corresponding to the maximum leakage volume as the central detection device.

[0074] When a pipe leaks, the water does not diffuse entirely under the influence of gravity as it seeps into the soil. Instead, the water diffuses in a discrete manner under the influence of osmotic pressure and gravity. This allows the leak detection device closest to the leak point to detect the leak, while other leak detection devices can also detect a certain amount of leakage.

[0075] Based on the magnitude of the leakage, the leakage detection device corresponding to the largest leakage volume is selected and defined as the central detection device. Since the penetration and diffusion of water is affected by gravity, the leakage detection device closest to the leak point will detect the largest leakage volume; therefore, the central detection device is the leakage detection device closest to the leak point. Furthermore, the leakage detection device farther from the central detection device will detect a smaller leakage volume.

[0076] The maximum leakage volume is determined 10 minutes after any leakage detection device begins to detect leakage. For example, if one leakage detection device detects leakage first at 9:00 AM, the leakage volumes detected by all leakage detection devices are compared at 9:10 AM to determine the maximum leakage volume and the central detection device.

[0077] S3000: Determine the offset ratio based on the ratio of the leakage detected by the leakage detection devices on both sides of the central detection device.

[0078] The leakage detection devices on either side of the central detection device are defined as the left reference detection device and the right reference detection device, with the direction from the left reference detection device to the right reference detection device being the direction of water flow in the pipe. Based on the left reference leakage L1 detected by the left reference detection device and the right reference leakage L2 detected by the right reference detection device, the offset ratio is calculated as: B = L1 / L2.

[0079] S4000: Obtain offset information according to the preset correspondence between offset information and offset ratio, wherein the offset information includes offset direction information and offset amount information relative to the center detector.

[0080] When the offset ratio B=1, the leak point has zero offset relative to the central detection device, and is located directly above the central detection device. When the offset ratio B>1, it indicates that the left reference leak volume L1> the right reference leak volume L2. In this case, the leak point on the pipe is located at a certain distance from the pipe position corresponding to the central detection device towards the left reference detector. Specific offset values ​​can be queried from a database that corresponds to different offset ratios, and this query can be performed using web crawling technology.

[0081] Similarly, when the offset ratio B < 1, the leak point on the pipe is located a certain distance from the position of the central detection device towards the right reference detector. The specific offset can be found in a database showing different offset values ​​for different offset ratios. For example, when the offset ratio B = 0.5, the offset is 1 meter; in this case, the leak point is located directly above the central detector and moved 1 meter towards the right reference detector.

[0082] S5000: Generates the axial position information of the leak point based on the offset information and the location of the central detection device.

[0083] After obtaining the offset information, it is combined with the position information of the central detection device to form the axial position information of the leak point, that is, the position information of the leak point in the direction of the pipe length. For example, the axial position information of the leak point can be the position on the pipe 50 meters away from the pipe inlet.

[0084] S6000: Sends the axial position information of the leak point to the back-end terminal.

[0085] The axial location information of the leak point is transmitted to the back-end terminal wirelessly. Staff can determine the pipe leakage situation and the location of the leak point based on the axial location information.

[0086] The principle of this embodiment is as follows: by utilizing the movement law of water in the soil layer under the action of gravity and osmotic pressure, and based on the relationship between the left reference leakage volume and the right reference leakage volume, the offset direction and offset distance of the leakage point relative to the central detection device are determined. Thus, the location of the leakage point is estimated based on the location of the central detection device, which helps the staff to find the location of the leakage point and carry out repair work.

[0087] exist Figure 2 Before step S1000 or after step S5000 in the illustrated embodiment, the height of the leak point relative to the pipe is estimated based on the axial position information of the leak point, as follows:

[0088] Reference Figure 3 and Figure 4The method for obtaining the height information of the leak point in the pipeline is as follows:

[0089] S0011: Obtain the inlet flow rate and outlet flow rate of the pipeline. When the inlet flow rate begins to exceed the outlet flow rate, obtain the corresponding time and define it as the leakage start time node, and at the same time obtain the leakage flow rate difference.

[0090] An inlet flow meter is installed at the pipe inlet, and an outlet flow meter is installed at the pipe outlet, allowing for real-time acquisition of the inlet and outlet flow rates. By comparing the inlet and outlet flow rates in real time, the point at which leakage begins can be determined and defined as the leakage onset point. That is, the point at which the inlet flow rate begins to exceed the outlet flow rate. Simultaneously, the leakage flow rate difference is calculated based on the difference between the inlet and outlet flow rates.

[0091] S0012: Obtain the time node corresponding to when the central detection device detects a leak, and define the time node corresponding to when the central detection device detects a leak as the initial detection time node.

[0092] When the central detection device begins to detect leakage, it records the corresponding time point and sends it to the backend terminal. At the same time, the time point when the central detection device begins to detect leakage is defined as the initial detection time point.

[0093] S0013: Calculate the seepage time value based on the difference between the leakage start time and the initial detection time.

[0094] When a pipe begins to leak, the water needs to penetrate the soil layer to reach the bearing plate and then enter the leak trench, or it can seep directly into the leak trench through the soil layer. This means it takes time for the water to enter the leak trench. Therefore, the leak start time is earlier than the initial detection time. The seepage time value is calculated based on the difference between the leak start time and the initial detection time. For example, if the leak start time is 11:00:00 AM and the initial detection time is 11:03:05 AM, the seepage time value is 3 minutes and 5 seconds.

[0095] S0014: Obtain the leakage point height information based on the preset correspondence between the pipeline leakage point height information and the seepage time value, pipeline offset information, and pipeline flow difference.

[0096] Given a fixed difference between pipe offset information and pipe flow rate, the path taken by water to seep into the leakage channel varies depending on the height of the leak point relative to the pipe's central axis. This results in different time values ​​required for water at different heights in the pipe to seep into the leakage channel. For example, let's define several leak points at different heights on the pipe as A, B, and C. Leak point A is furthest from the receiving plate, while leak point C is closest to the receiving plate B. In this case, the time required for water at leak point A to seep into the leakage channel is the longest compared to leak points B and C. That is, given a fixed difference between pipe offset information and pipe flow rate, each seepage time value corresponds to a specific leak point height. Therefore, the leak point height can be queried from a database showing different leak point heights corresponding to different seepage time values.

[0097] Furthermore, because the leakage point offset information is different, even if the leakage height is the same, the seepage time value will be different. For example, when the leakage point is located directly above the central detection device, the axial distance that the water moves is the smallest during the process of water seeping into the leakage tank. Therefore, when the difference between the leakage point height and the pipeline flow rate is constant, the leakage point with zero offset corresponds to the smallest seepage time value, and the larger the offset of the leakage point, the larger the corresponding seepage time value.

[0098] Meanwhile, the difference in leakage flow rate also has a certain impact on the seepage time, and the larger the difference in leakage flow rate, the shorter the corresponding seepage time. For example, the seepage time corresponding to a leakage flow rate difference of 10L / min is greater than the seepage time corresponding to a leakage flow rate difference of 7L / min. That is, the greater the amount of water leaking per unit time in the pipe, the shorter the time it takes for the water to travel from the leak point to the leak channel.

[0099] In summary, the height of a pipe leak can be queried from a database of different pipe offset information, different pipe flow rate differences, and different seepage time values. For example, if the leak is offset by 1 meter from the central detection device towards the left reference detection device, the pipe flow rate difference is 10 L / min, and the seepage time is 3 minutes, the corresponding pipe leak height is +0.2 meters. Here, 0.2 meters indicates that the vertical coordinate difference between the leak and the pipe's central axis is 0.2 meters, and the leak is above the pipe's central axis.

[0100] S0015: Send the height information of the leak point to the backend terminal.

[0101] The system sends the height information of the leak point to the back-end terminal via wireless communication, enabling staff to obtain further information about the specific location of the pipeline.

[0102] The principle of this embodiment is as follows: different seepage time values, different pipe offset information, and different pipe flow rate differences correspond to different pipe height information, which facilitates the staff to further obtain the height information of the leak point based on the axial information of the pipe leak point. Among them, S0014 and S0015 are after step S5000, and steps S0011, S0012, and S0013 are before step S1000.

[0103] Reference Figure 3 and Figure 5 In another embodiment, a different method for determining the height of the pipe leak point is adopted, as follows:

[0104] S0101: Obtain the inlet flow rate and outlet flow rate of the pipeline, and calculate the leakage flow rate difference of the pipeline based on the difference between the inlet flow rate and the outlet flow rate.

[0105] An inlet flow meter is installed at the inlet of the pipe, and an outlet flow meter is installed at the outlet of the pipe, so that the difference between the inlet flow, the outlet flow, and the leakage flow can be known.

[0106] S0102: Obtain the total leakage detected by all leakage detectors.

[0107] The total leakage detected by all leakage detection devices is calculated by summing the leakage amounts detected by all leakage detectors.

[0108] S0103: Based on the relationship between the total leakage volume Z and time, generate a function graph of the total leakage volume versus time value, and obtain the slope K of the gradient line of the corresponding function graph. Calculate the leakage bearing ratio: C=K / N, where N is the leakage flow difference; and obtain the leakage point height information based on the preset correspondence between the leakage point height information and the leakage bearing ratio.

[0109] Because water needs a certain infiltration time to enter the leakage channel when the pipe first starts to leak, the total leakage detected by all leakage detection devices will be zero for a period of time when the inlet flow rate is just over the outlet flow rate. As water begins to seep into the leakage channel, the total leakage detected by all leakage detection devices will start to increase. When the soil absorbs water to the point of saturation, the rate of increase of the total leakage will tend to a constant value. However, since the soil absorbs water to the point of saturation slowly, the rate of increase of the total leakage cannot be accurately determined in a short time. That is, the rate of increase of the total leakage will gradually increase over time and gradually approach zero, but the rate of increase of the total leakage will not reach zero in a short time. In other words, the rate of increase of the total leakage cannot be determined in a short time. At this point, a function graph of the total leakage volume versus time value can be generated by computer, and the equation of the gradient line corresponding to the function graph can be obtained, thereby obtaining the gradient line slope K, that is, the "final" increase rate of the total leakage volume.

[0110] Because the width of the receiving plate is limited, it cannot catch all the leaking water from the pipe; some water will seep outside the receiving plate. Furthermore, since the receiving plate is located directly below the pipe, it can catch the most water when the leak is at its lowest point. When the leak is at its highest point, most of the water is dispersed into the soil through infiltration and gravity, but a small amount still seeps into the receiving plate and then into the leak channel. Therefore, the rate of increase of the total leakage volume detected by all leakage detection devices differs from the difference in leakage flow rate when the leak is located at different heights within the pipe.

[0111] The physical meaning of the slope K of the gradient line is: the rate of increase of the total leakage volume that the leakage detection device can detect when the soil reaches complete saturation, and the leakage bearing ratio C=K / N is calculated. The leakage bearing ratio represents: the ratio between the leakage volume received by the bearing plate and the total leakage volume of the pipeline when the soil reaches complete saturation.

[0112] Therefore, the height of the leak point in the pipeline can be queried from a database that corresponds to different leak point heights with different leak acceptance ratios. For example, when the distance between the receiving plate and the pipeline is constant, the leak acceptance ratio is 75% when the leak point is at the bottom of the pipeline, and 15% when the leak point is at the top of the pipeline. The specific numerical correspondence is related to the distance between the receiving plate and the pipeline; this embodiment is merely an example of data illustration.

[0113] S0104: Send the height information of the leak point to the backend terminal.

[0114] The principle of this embodiment is as follows: by utilizing the different heights of the leak points in the pipeline, it can be determined that the proportion of leaks that the receiving plate can receive also varies. At the same time, by analyzing the function graph of the total leakage volume versus time, the proportion of leakage volume that the receiving plate can receive under the condition of "complete soil saturation" can be obtained, thereby making the prediction of the leak point height more accurate.

[0115] exist Figure 4 Before step S0011 or step S0101, since there are two points at the same height on the pipeline, it is necessary to analyze and judge the preceding and following information of the pipeline leak point in order to more accurately predict and locate the leak. Specifically, this is done through... Figure 5 The illustrated embodiment will be used for explanation.

[0116] Reference Figure 3 Methods for obtaining pre- and post-pipeline information include:

[0117] S0001: Obtain the pre-detection signal and the pre-detection time node corresponding to the pre-detection signal, and obtain the post-detection signal and the post-detection time node corresponding to the post-detection signal.

[0118] Each leak detection tank 112 is equipped with a pre-detector 114 and a post-detector 115. A leakage detection device 113 is located in the middle of each leak detection tank 112, directly below the pipe 2. The pre-detector 114 and post-detector 115 are located on either side of the leakage detection device 113. The pre-detector 114 and post-detector 115 are used to detect leakage signals. When water passes through the pre-detector 114, the pre-detector 114 sends a signal to the back-end terminal, which records the corresponding time point and defines it as the pre-detection time point. Simultaneously, when water passes through the post-detector 115, the post-detector 115 sends a signal to the back-end terminal, which records the corresponding time point and defines it as the post-detection time point.

[0119] S0002: Based on the chronological relationship between the pre-detection time nodes and the post-detection time nodes, generate pre- and post-detection information of the leak point, which includes pre-detection information and post-detection information of the leak point.

[0120] When the current detection time node is earlier than the subsequent detection time node, it indicates that the leak point is located on the side of the pipeline closer to the current detector, and this is defined as the leak point being pre-detected. When the current detection time node is later than the subsequent detection time node, it indicates that the leak point is located on the side of the pipeline closer to the subsequent detector, and this is defined as the leak point being post-detected.

[0121] S0003: Send pre- and post-leakage information to the backend terminal.

[0122] By transmitting information about the location of the leak wirelessly to the back-end terminal, staff can determine whether the leak is located before or after the leak.

[0123] The principle of this embodiment is as follows: by setting up a pre-detector and a post-detector, and by using the pre-detection time node and the post-detection time node, the pre-detection status of the pipeline leak point is judged.

[0124] exist Figure 4 In the steps following step S0015, after obtaining the axial position information of the leak point, the preceding and following information of the leak point, and the height of the leak point, the information is further integrated, as follows:

[0125] S7000: Based on the information of the leak point before and after the leak point, the height information of the leak point, and the axial position information of the leak point, it integrates the leak point location information and sends the leak point location information to the back-end terminal and the terminal held by the maintenance personnel.

[0126] After receiving information about the leak point's location, height, and axial position, the backend terminal integrates this information to form the leak point's location information, which is then sent to the terminal held by the maintenance personnel. This provides the maintenance personnel with more specific and concise information about the leak's location, facilitating its identification.

[0127] exist Figure 4 Before step S0014, the method for obtaining the correspondence between the preset pipeline leak point height information and the seepage time value, pipeline offset information, and pipeline flow difference is as follows:

[0128] S801: Obtain information on the dryness of the soil layer;

[0129] Information on the dryness of the soil layer refers to the moisture content within the soil layer, which can be measured using a hygrometer.

[0130] S802: Obtain the current seepage velocity index information based on the preset correspondence between seepage velocity index information and soil dryness information.

[0131] The infiltration velocity index is the rate at which water seeps into the soil. When the soil is relatively dry, it absorbs some of the water, thus slowing down the rate of water seepage. The infiltration velocity index can be found in data on different infiltration velocity indices corresponding to different soil dryness conditions. For example, given a specific soil type, when the soil moisture content is 1 kg / m³, the infiltration velocity index is 1.3.

[0132] S803: Based on the preset correspondence between pipeline leak point height information and seepage time value, pipeline offset information, pipeline flow difference and seepage velocity index information, obtain the correspondence between pipeline leak point height information and seepage time value, pipeline offset information and pipeline flow difference corresponding to the current seepage velocity index information.

[0133] The correspondence between the height of the leak point and the leakage time, pipe offset, and flow rate difference varies under different seepage velocity indices. This correspondence can be found in a database that provides different leak point heights, leakage time values, pipe offsets, and flow rate differences for different seepage velocity indices.

[0134] The principle of this embodiment is as follows: based on the consideration of soil dryness, the correspondence between pipeline leakage point height information and seepage time value, pipeline offset information, and pipeline flow difference is further distinguished and judged, so as to make the prediction results more accurate.

[0135] In the steps preceding S802, since the seepage velocity index varies depending on the soil type, the following approach is adopted to obtain a more accurate seepage velocity index:

[0136] S8011: Obtain soil information;

[0137] Soil information refers to soil types. Different countries and regions have different soil types. Soil analysis is performed to determine the soil type for each pipeline during installation and pre-laying.

[0138] S8012: Based on the correspondence between the seepage velocity index information and the soil quality information and soil dryness information, obtain the seepage velocity index corresponding to the current soil quality and the current soil dryness.

[0139] The principle of this embodiment is as follows: In order to further determine the seepage velocity index, the soil quality is analyzed and judged, so as to make the prediction result of the leakage point height more accurate.

[0140] Based on the same inventive concept, embodiments of the present invention provide a pipeline leakage location and detection system, including: an acquisition module, used to acquire the location of the leakage detection device and the detected leakage amount.

[0141] The processing module is used to filter out the central detection device based on the leakage volume, determine the offset ratio based on the ratio of the leakage volume on both sides of the central detection device, match the offset information based on the offset ratio, and generate the axial position information of the leakage point based on the offset information and the location of the central detection device.

[0142] The information sending module is used to send the axial position information of the leak point to the back-end terminal;

[0143] Memory, used to store the control method program for locating pipe leaks;

[0144] The processor and the program in the memory can be loaded and executed by the processor to implement the control method for locating the above-mentioned pipeline leak.

[0145] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0146] This invention provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed as described above for locating and detecting pipe leaks.

[0147] Computer storage media include, for example, USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and other media that can store program code.

[0148] Based on the same inventive concept, embodiments of the present invention provide a smart terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed by the above-described pipeline leakage location and detection method.

[0149] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device, and unit described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0150] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A method for locating and detecting pipeline leaks, characterized in that: include: Obtain the location of the leakage detection device and the amount of leakage detected; The leakage detection device corresponding to the maximum leakage volume is selected, and the leakage detection device corresponding to the maximum leakage volume is defined as the central detection device. The offset ratio is determined based on the ratio of the leakage detected by the leakage detection devices on both sides of the central detection device. The offset information is obtained according to the preset correspondence between offset information and offset ratio. The offset information includes offset direction information and offset amount information relative to the center detector. The axial position information of the leak point is generated based on the offset information and the location of the central detection device. Send the axial position information of the leak point to the backend terminal; The method for further obtaining the location of the leak point based on the axial position information of the leak point is as follows: Obtain the inlet flow rate and outlet flow rate of the pipeline. When the inlet flow rate starts to exceed the outlet flow rate, obtain the corresponding node and define it as the leakage start time node. At the same time, obtain the leakage flow rate difference. Obtain the time point at which the central detection device detects a leak, and define the time point at which the central detection device detects a leak as the initial detection time point; The seepage time value is calculated based on the difference between the time when the leak started and the time when the initial detection was conducted. Based on the preset correspondence between the height of the pipeline leak point and the seepage time value, pipeline offset information, and pipeline flow difference, the height of the leak point is obtained; Send the height information of the leak point to the backend terminal; The steps before obtaining the height information of the leak point are as follows: Obtain the preceding detection signal and the corresponding preceding detection time node; obtain the following detection signal and the corresponding following detection time node. Based on the chronological relationship between the pre-detection and post-detection time nodes, information about the leak point is generated, which includes both pre-detection and post-detection information. Send pre- and post-leakage information to the backend terminal; The steps following the acquisition of the axial position information, height information, and preceding / following information of the leak point are as follows: Based on the information about the front and rear of the leak point, the height of the leak point, and the axial position of the leak point, the leak point location information is integrated and sent to the back-end terminal and the terminal held by the maintenance personnel.

2. The pipeline leakage location and detection method according to claim 1, characterized in that: It also includes steps prior to obtaining the axial location information of the leak point, as follows: Obtain the inlet flow rate and outlet flow rate of the pipeline; Calculate the leakage flow difference of the pipeline based on the difference between the inlet flow rate and the outlet flow rate. Obtain the total amount of leakage detected by all detectors; Based on the relationship between the total leakage volume and time, a function graph of the total leakage volume versus time value is generated, and the slope K of the gradient line of the corresponding function graph is obtained. The leakage bearing ratio is calculated as: C=K / N, where N is the difference in leakage flow rate. Based on the preset correspondence between the height of the leak point and the leak-bearing ratio, the height information of the leak point is obtained; Send the height information of the leak point to the backend terminal.

3. The pipeline leakage location and detection method according to claim 1, characterized in that: It also includes methods for obtaining the pre-defined correspondence between leak point height information and seepage time value, pipe offset information, and pipe flow difference, as detailed below: Obtain information on the dryness of the soil layer; Based on the pre-defined correspondence between seepage velocity index information and soil dryness information, the current seepage velocity index information is obtained; Based on the preset correspondence between the height of the leak point and the seepage time value, the pipe offset information, the pipe flow rate difference, and the seepage velocity index information, the correspondence between the current seepage velocity index information and the leak point height information and the seepage time value, the pipe offset information, and the pipe flow rate difference is obtained.

4. The pipeline leakage location and detection method according to claim 3, characterized in that: It also includes methods for obtaining further infiltration velocity index information, as detailed below: Obtain soil information; Based on the correspondence between the seepage velocity index information and the soil quality information and soil dryness information, obtain the current soil quality information and the seepage velocity index information corresponding to the current soil dryness condition.

5. A pipe leakage location system, characterized in that, include: The acquisition module is used to acquire the location of the leakage detection device and the amount of leakage detected; Processing module; It is used to screen out the central detection device based on the leakage volume, determine the offset ratio based on the ratio of the leakage volume on both sides of the central detection device, match the offset information based on the offset ratio, and generate the axial position information of the leakage point based on the offset information and the location of the central detection device. The information sending module is used to send the axial position information of the leak point to the back-end terminal; The memory is used to store the control method program of the pipeline leakage location and detection method as described in claim 1; The processor and the program in the memory can be loaded and executed by the processor to implement the control method of the pipeline leakage location and detection method as described in claim 1.

6. A smart terminal, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executed according to any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer program is stored that can be loaded by a processor and executed according to any one of claims 1 to 4.

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