A method, device, electronic device and storage medium for detecting dike leakage

Abstract

The present application relates to a method, device, electronic device and storage medium for detecting dike leakage, and relates to the field of dike detection. The method includes the following steps: obtaining magnetic field distribution information of a target dike with a current loop at different heights; obtaining a three-dimensional magnetic field contour map of the target dike with a current loop based on the magnetic field distribution information at different heights; obtaining a ratio response map of the target dike based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map; and determining the leakage channel position of the target dike based on the ratio response map. Since the leakage channel of the target dike is determined by the magnetic field data directly excited by the current in the present application, more stable and reliable measurement results can be obtained compared with manual inspection and geological drilling.

Description

Technical Field

[0001] This application relates to the technical field of levee detection, and specifically to a method, device, electronic device, and storage medium for detecting levee leakage. Background Art

[0002] With the rapid development of China's social economy, as one of the pillar industries in the work of China's national economic development, it has also developed rapidly. The construction of water conservancy projects plays an important guarantee role in the development of agriculture, industry, transportation, and other industries in China.

[0003] Hidden dangers of levees mainly include types such as caves, soft layers, cracks, and leakage channels. Among them, leakage channels are one of the important reasons for levee accidents. Therefore, an important part of levee dam inspection is the detection of leakage piping. If a method can be used to quickly, timely, and accurately discover the leakage piping channel and eliminate the levee danger in the bud with the least amount of manpower and material resources, it is of great significance for ensuring the safe operation of flood control levees and reservoir dams.

[0004] Methods for levee leakage detection can generally be divided into three types: manual inspection, geological drilling, and geophysical exploration. Manual inspection is intuitive and reliable and is suitable for detecting the leakage channel opening, but the inspection depth is limited, the inspection risk coefficient is high, and the efficiency is low; geological drilling can detect leakage hidden dangers and can be blocked and reinforced in a timely manner, but it is prone to missed inspections, requires a large amount of manpower and material resources, has low efficiency, and causes damage to the levee. It can be seen that both manual inspection and geological drilling cannot meet the requirements of fast, accurate, and non-destructive detection. Geophysical exploration technology is a technology that indirectly detects the leakage hidden dangers of levees by measuring parameters such as the apparent resistivity, wave conduction characteristics, and temperature distribution of the main body of the levee, and usually has the advantages of fast, efficient, and non-destructive detection.

[0005] The electrical conductivity of different levee media is different, but the magnetic permeability can be regarded as the same. The magnetic field has strong penetration ability in these media, and the magnetic field strength attenuates slowly with the increase of depth, so the effective detection depth is greatly improved. In addition, the excitation electrode is directly in contact with good conductors such as water, and the measuring device does not need to be grounded, which can avoid errors caused by unstable electrochemistry between the measuring electrode and the earth. The limitations of this method are mainly manifested as follows: the corresponding forward and inverse theories are not yet perfect, and the accuracy of data processing and interpretation needs to be improved; it is necessary to hold the instrument for multi-point measurement, and the efficiency is low; the measured magnetic field signal is a weak signal, which is easily interfered by the external magnetic field, and high measurement accuracy is required for the magnetic field measurement device.

[0006] Therefore, how to accurately detect the location of the levee leakage channel is an urgent problem to be solved at present. Summary of the Invention

[0007] The present application provides a method, device, electronic device, and storage medium for detecting embankment leakage to accurately detect the location of the embankment leakage channel.

[0008] To achieve the above object, the present application provides the following solutions.

[0009] In a first aspect, the present application provides a method for detecting embankment leakage, the method comprising the following steps:

[0010] Obtain the magnetic field distribution information of the target embankment with a current loop at different heights;

[0011] Based on the magnetic field distribution information at different heights, obtain a three-dimensional magnetic field contour map of the target embankment with a current loop;

[0012] Based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map, obtain a ratio response map of the target embankment;

[0013] Based on the ratio response map, determine the location of the leakage channel of the target embankment.

[0014] Further, before obtaining the magnetic field distribution information of the target embankment with a current loop at different heights, the following steps are included:

[0015] Insert one electrode into the water outlet of the leakage channel of the target embankment, and place another electrode at a preset distance from the water outlet position;

[0016] Under the action of an excitation power supply, form a current loop based on the electrodes.

[0017] Further, obtaining the magnetic field distribution information of the target embankment with a current loop at different heights includes the following steps:

[0018] Use a magnetic field measuring instrument to obtain the magnetic field distribution information of the target embankment;

[0019] Respectively obtain the position information and attitude information of the magnetic field measuring instrument;

[0020] Based on the magnetic field distribution information, the attitude information, and the height information, obtain magnetic field distribution table information.

[0021] Further, obtaining the magnetic field distribution information of the target embankment with a current loop at different heights includes the following steps:

[0022] Determine the target height information, and match all the attitude information and magnetic field distribution information corresponding to the target height information in the magnetic field distribution table information;

[0023] Correct all attitude information to be consistent and synchronously adjust the magnetic field distribution information corresponding to the attitude information.

[0024] Further, obtaining the three-dimensional magnetic field contour map of the target levee with a current loop placed thereon based on the magnetic field distribution information at different heights includes the following steps:

[0025] Obtain the magnetic field distribution information at different heights respectively;

[0026] Based on the magnetic field distribution information at each different height and the magnetic gradient tensor method, obtain the gradient tensor matrix;

[0027] Based on the gradient tensor matrix, obtain the three-dimensional magnetic field contour map of the target levee with a current loop placed thereon.

[0028] Further, obtaining the ratio response map of the target levee based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map includes the following steps:

[0029] Based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map, obtain the ratio of the three-dimensional magnetic field contour maps;

[0030] Based on the ratio of the three-dimensional magnetic field contour maps, obtain the ratio response map of the target levee.

[0031] Further, determining the leakage channel position of the target levee based on the ratio response map includes the following steps:

[0032] Obtain the color information of the ratio response map;

[0033] Select the darkest color information from the color information;

[0034] Select the area corresponding to the darkest color information and determine the area as the leakage channel position of the target levee.

[0035] In a second aspect, the present application provides a levee leakage detection device, and the device includes:

[0036] A magnetic field information acquisition module, which is used to acquire the magnetic field distribution information of a target levee with a current loop placed thereon at different heights;

[0037] An isogram acquisition module, which is used to obtain the three-dimensional magnetic field contour map of the target levee with a current loop placed thereon based on the magnetic field distribution information at different heights;

[0038] A ratio response map acquisition module, which is used to obtain the ratio response map of the target levee based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map;

[0039] A position determination module, which is used to determine the leakage channel position of the target levee based on the ratio response map.

[0040] Further, the magnetic field information acquisition module includes:

[0041] An electrode setting sub-module, which is used to insert one electrode into the water outlet of the leakage channel of the target levee, and then place another electrode at a preset distance from the water outlet position;

[0042] A circuit determination sub-module, which is used to form a current circuit based on the electrodes under the action of an excitation power supply.

[0043] Further, the magnetic field information acquisition module further includes:

[0044] A first information acquisition sub-module, which is used to acquire the magnetic field distribution information of the target levee by using a magnetic field measuring instrument;

[0045] A second information acquisition sub-module, which is used to acquire the position information and attitude information of the magnetic field measuring instrument respectively;

[0046] A third information acquisition sub-module, which is used to acquire magnetic field distribution table information based on the magnetic field distribution information, the attitude information and the height information.

[0047] Further, the magnetic field information acquisition module further includes:

[0048] An information association sub-module, which is used to determine the target height information, and match all the attitude information and magnetic field distribution information corresponding to the target height information in the magnetic field distribution table information;

[0049] An information correction sub-module, which is used to correct all the attitude information to be consistent and synchronously adjust the magnetic field distribution information corresponding to the attitude information.

[0050] Further, the contour map acquisition module includes:

[0051] A distribution information acquisition sub-module, which is used to acquire the magnetic field distribution information at different heights respectively;

[0052] A matrix acquisition sub-module, which is used to acquire a gradient tensor matrix based on the magnetic field distribution information at each different height and the magnetic gradient tensor method;

[0053] A contour map generation sub-module, which is used to acquire a three-dimensional magnetic field contour map of the target levee where the current circuit is placed based on the gradient tensor matrix.

[0054] Further, the ratio response map acquisition module includes:

[0055] Based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map, obtain the ratio of the three-dimensional magnetic field contour maps;

[0056] Based on the ratio of the three-dimensional magnetic field contour maps, obtain the ratio response map of the target levee.

[0057] Further, the position determination module includes:

[0058] A color information acquisition sub-module, which is used to acquire the color information of the ratio response map;

[0059] A selection sub-module, which is used to select the darkest color information from the color information;

[0060] A region determination sub-module, which is used to determine a ridge line from the region corresponding to the darkest color information, and determine the ridge line as the leakage channel position of the target levee.

[0061] The beneficial effects brought by the technical solution provided in this application include:

[0062] This application first obtains the magnetic field distribution information of the target levee with a current loop at different heights. Based on the magnetic field distribution information at different heights, a three-dimensional magnetic field contour map of the target levee with a current loop is obtained. Based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map, a ratio response map of the target levee is obtained. Based on the ratio response map, the leakage channel position of the target levee is determined.

[0063] In this application, by placing a current loop at the target levee, then obtaining the magnetic field distribution information at different heights from the target levee, and then generating a three-dimensional magnetic field contour map and a ratio response map according to the magnetic field distribution information at different heights, and determining the position of the leakage channel of the target levee according to the ratio response. Since the magnetic field data directly excited by the current is used in this application to determine the leakage channel of the target levee, compared with manual inspection and geological drilling, more stable and reliable measurement results can be obtained. Since the three-dimensional magnetic field contour map and the ratio response map are generated based on the magnetic field distribution information at different heights in this application, compared with the magnetic field distribution information at the same height, the leakage channel can be located more accurately. Description of the Drawings

[0064] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0065] Figure 1It is a flowchart of the steps of the levee leakage detection method provided in the embodiments of the present application;

[0066] Figure 2 It is a magnetic field distribution information diagram obtained by the levee leakage detection provided in the embodiments of the present application;

[0067] Figure 3 It is a schematic diagram of the levee leakage detection method provided in the embodiments of the present application. Specific embodiments

[0068] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0069] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0070] The embodiments of the present application provide a levee leakage detection method, device, electronic device and storage medium, so as to accurately detect the position of the levee leakage channel.

[0071] To achieve the above technical effects, the general idea of the present application is as follows:

[0072] A levee leakage detection method, the method includes the following steps:

[0073] S1. Obtain the magnetic field distribution information of the target levee with a current loop at different heights;

[0074] Among them, the current loop is composed of two end electrodes and an excitation power supply. The current loop is formed by inserting one of the two end electrodes into the water outlet of the target levee leakage channel, and then placing the other end electrode at a preset distance from the water outlet position;

[0075] The current loop will generate a magnetic field in the surrounding space. The magnetic field distribution information at different heights can be recorded by a magnetic field measuring instrument, and the magnetic field measuring instrument can be carried by a drone to different distances from the target levee to measure the magnetic field distribution information.

[0076] Since the magnetic field distribution information is vector information, this magnetic field distribution information is related to the position and attitude of the magnetic field measuring instrument at different heights. Therefore, while obtaining the magnetic field distribution information at different heights through the magnetic field measuring instrument, it is also necessary to obtain the real-time position information and real-time attitude information of the magnetic field measuring instrument, and correlate the magnetic field distribution information obtained at different positions at the same target height, as well as the position information and attitude information of the magnetic field measuring instrument at this time, to obtain the comprehensive magnetic field distribution information.

[0077] The way for the magnetic field measuring instrument to obtain the magnetic field distribution information can be to use a drone to carry the magnetic field measuring instrument to different positions at different heights, so that the magnetic field measuring instrument can obtain the magnetic field distribution information at different heights and different positions.

[0078] Specifically, the magnetic field measuring instrument sends the magnetic field distribution information to the information processor through the main control circuit. The information processor uses the conditioning circuit to perform low-noise pre-amplification and band-pass filtering on the analog signal measured by the magnetic sensor, then uses the quadrature lock-in amplifier circuit to extract the signal with the same frequency as the excitation current signal, and then uses the analog-to-digital conversion circuit to convert the analog signal into the magnetic field distribution information measured at different heights represented by digital signals.

[0079] S2. Based on the magnetic field distribution information at different heights, obtain the three-dimensional magnetic field contour map of the target dike where the current loop is placed;

[0080] It can be understood that in addition to carrying the magnetic field measuring instrument, the drone can also carry a camera for obtaining the environmental information of the target dike.

[0081] Specifically, according to the magnetic field distribution information at different heights obtained in S1 and the environmental information of the target dike obtained, using the magnetic gradient tensor method, the magnetic field distribution information and the environmental information are integrated into a gradient tensor matrix, and then the three-dimensional magnetic field contour map is obtained based on this gradient tensor matrix.

[0082] S3. Based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map, obtain the ratio response map of the target dike;

[0083] Among them, the generation process of the simulated three-dimensional magnetic field contour map is first to perform three-dimensional modeling on the three-dimensional software according to the real scene photo of the target dike taken by the camera, and then perform electromagnetic simulation on this three-dimensional model in the electromagnetic simulation software to obtain the simulated three-dimensional magnetic field contour map of the target dike.

[0084] The ratio response map refers to the image formed after comparing the three-dimensional magnetic field contour map with the simulated three-dimensional magnetic field contour map, which can be called the ratio response map.

[0085] S4. Based on the ratio response map, determine the position of the leakage channel of the target dike.

[0086] Determine the color information of each area from the ratio response diagram, and determine the area with the darkest color through the color contrast bar. The area with the darkest color is the leakage channel position of the target dike.

[0087] In this application, the current loop is placed at the target dike, and then the magnetic field distribution information at different heights from the target dike is obtained. Then, a three-dimensional magnetic field contour map and a ratio response diagram are generated based on the magnetic field distribution information at different heights, and the position of the leakage channel of the target dike is determined according to the ratio response. Since the magnetic field data directly excited by the current is used in this application to determine the leakage channel of the target dike, compared with manual inspection and geological drilling, more stable and reliable measurement results can be obtained.

[0088] In one embodiment, as Figure 2 shown, step S1 further includes the following steps:

[0089] Insert one electrode into the water outlet of the leakage channel of the target dike, and place the other electrode at a preset distance from the water outlet position; under the action of the excitation power supply, a current loop is formed based on the electrodes.

[0090] Among them, the first power supply electrode and the second power supply electrode can be a single electrode or an electrode array composed of multiple electrodes. The electrodes are made of metal materials with good electrical conductivity such as copper and aluminum.

[0091] When detecting the target dike, the first power supply electrode can be placed in the water at a certain distance from the outside of the dike, and the second power supply electrode can be placed at the leakage water outlet position inside the dike and in full contact with the seepage water. In other embodiments, if there are multiple leakage water outlets in the target dike, an electrode can be placed at each water outlet, and then they are connected in parallel with wires to form an electrode array. The signal transmitter is connected to the first power supply electrode and the second power supply electrode through wires. The signal transmitter generates an excitation current with a certain frequency and amplitude, and transmits the excitation current to the water through the first power supply electrode; when there is a leakage channel inside the dike, the excitation current will flow through the leakage water inlet, the leakage channel and the power supply electrode, and return to the signal transmitter to form a current loop.

[0092] In the embodiment of this application, the magnetic field data directly excited by the current is used to determine the leakage channel of the target dike. Compared with manual inspection and geological drilling, more stable and reliable measurement results can be obtained.

[0093] When using a drone to carry a magnetic field measuring instrument to different heights, the drone often shakes and jitters during flight, which can cause the attitude of the magnetic field measuring instrument to change, thereby introducing measurement errors. Therefore, it is necessary to obtain the real-time attitude information and position information for attitude correction to reduce the error between the measured magnetic field distribution information and the actual magnetic field distribution information.

[0094] Therefore, in an embodiment of the application, step S1 includes the following steps:

[0095] S101. Use a magnetic field measuring instrument to obtain the magnetic field distribution information of the target levee;

[0096] Specifically, as Figure 2 shown, the magnetic field distribution information measured by the magnetic field measuring instrument is presented. The magnetic field signals generated by the levee leakage channels at different measuring points and different heights can be measured using a single drone or a network of multiple drones. When using multiple drones, the magnetic field signals generated by the leakage channels at different positions at different heights can be measured simultaneously using a networking method. The networking method can be Bluetooth, WIFI, ZigBee, etc. Among them, each measuring point is distributed in a grid form, and the distance between different measuring points is set according to the size of different levees.

[0097] S102. Obtain the position information and attitude information of the magnetic field measuring instrument respectively;

[0098] Specifically, an attitude sensor and a position sensor installed on the magnetic field measuring instrument are used to measure the real-time attitude information and position information of the magnetic field measuring instrument. The magnetic sensor in the magnetic field measuring instrument is a three-axis fluxgate sensor or an optically pumped magnetometer, etc. The attitude sensor is a nine-axis attitude sensor or a six-axis attitude sensor, etc.; the position information can be obtained through RTK technology or using positioning technologies such as Beidou, GPS, GLONASS, GALILEO, etc.

[0099] S103. Based on the magnetic field distribution information, attitude information, and position information, obtain the magnetic field distribution table information.

[0100] Specifically, the magnetic field distribution information obtained by the magnetic field measuring instrument is associated with the attitude information and position information of the magnetic field measuring instrument at this time to obtain the magnetic field distribution table information.

[0101] In this embodiment, by obtaining the real-time attitude information and position information of the magnetic field measuring instrument for attitude correction, the error between the measured magnetic field distribution information and the actual magnetic field distribution information is reduced.

[0102] In an embodiment of the application, before step S2, it further includes:

[0103] Based on the target position information, obtain the target height information;

[0104] Specifically, the target height information of the magnetic field measuring instrument is determined from the target position information.

[0105] Match all attitude information and magnetic field distribution information corresponding to the target height information in the magnetic field distribution table information;

[0106] Among them, at the same height, the magnetic field measuring instrument will measure the magnetic field distribution information at multiple different position coordinates, and there will also be corresponding attitude information at different position coordinates.

[0107] Adjust the reference coordinate systems of all attitude information to be consistent, and synchronously adjust the magnetic field distribution information corresponding to the attitude information.

[0108] Specifically, after storing the attitude information of the magnetic field measuring instruments at different positions at the same height in one-to-one correspondence with the magnetic field distribution information measured by the magnetic field measuring instruments, obtain the reference coordinate systems of the attitude information corresponding to different position coordinates at the same height. Since the reference coordinate system of the magnetic field measuring instrument at some positions is offset due to the jitter of the unmanned aerial vehicle, make the reference coordinate systems of the attitude information unified through the transfer matrix method.

[0109] In the embodiment of the present application, since the attitude information of the magnetic field measuring instrument is used to correct the magnetic field distribution information in the present application, the accuracy of the magnetic field distribution information is improved.

[0110] In an embodiment of the application, step S3 includes the following steps:

[0111] S201. Obtain the magnetic field distribution information at different heights respectively;

[0112] Use a single or multiple unmanned aerial vehicles carrying magnetic measurement instruments and other instruments. First, fix the flight height of the unmanned aerial vehicle at a certain value to realize the magnetic field detection of all measurement points. Then increase the flight height of the unmanned aerial vehicle by a preset distance, such as 1 m, and realize the magnetic field detection of all measurement points again, so as to obtain the magnetic field distribution information at different heights.

[0113] S202. Based on the magnetic field distribution information at each different height and the magnetic gradient tensor method, obtain the gradient tensor matrix;

[0114] S203. Based on the gradient tensor matrix, obtain the three-dimensional magnetic field contour map of the target dike where the current loop is placed.

[0115] In an embodiment of the application, step S4 includes the following steps:

[0116] S401. Obtain the color information of the ratio response map;

[0117] S402. Select the darkest color information from the color information;

[0118] S403. Determine the ridge line from the area corresponding to the deepest color information, and determine the ridge line as the position of the leakage channel of the target levee.

[0119] Specifically, determine the color information of each area from the ratio response map, determine the area with the deepest color through the color comparison bar, determine the ridge line from the area corresponding to the deepest color information, and determine the ridge line as the position of the leakage channel of the target levee.

[0120] In this application, by placing the current loop at the target levee, then obtaining the magnetic field distribution information at different heights from the target levee, generating a three-dimensional magnetic field contour map and a ratio response map based on the magnetic field distribution information at different heights, and determining the position of the leakage channel of the target levee according to the ratio response. Since the magnetic field data directly excited by the current is used to determine the leakage channel of the target levee in this application, compared with manual inspection and geological drilling, more stable and reliable measurement results can be obtained.

[0121] In an embodiment of the application, a method for detecting levee leakage is provided:

[0122] Step 1: As shown in the figure during the test, the data that needs to be obtained near and above the water area cannot be safely entered by personnel during the flood season, and the complex environments such as nearby mud pits and paddy fields are not suitable for personnel to enter for measurement. Therefore, factors such as safety and measurement efficiency are comprehensively considered. Multiple drones are used to measure the magnetic field signals generated by the leakage channels of the levee at different heights. The drones can simultaneously measure the magnetic field signals at multiple positions at the same height by using a networking method. An attitude sensor and a position sensor are used to measure the real-time attitude information and position information of the magnetic field measuring instrument. Figure 2

[0123] Figure 3 Step 2: Send the data measured by the sensors to the host computer wirelessly through the designed conditioning circuit and main control circuit. As shown in the figure, the phase-locked amplification technology is used to measure the effective output voltage signal of the fluxgate; a high-precision positioning module and an attitude module are used to obtain the position and attitude information of the fluxgate sensor; the LCD display and Bluetooth real-time transmission of the data are realized. The main control circuit uses the RTC method, etc. to add time stamps to the collected attitude and position information.

[0124]

[0125] Step 3: Perform interpolation and maximum likelihood estimation on the attitude and position data respectively according to the time stamps. The relationship diagrams of the attitude and position data with time can be obtained respectively, and the attitude data is translated, and the optimal translation time is obtained by using the least square method. In this way, the accurate information of the attitude and position at the same time can be obtained.

[0125] Step 4: The attitude of the magnetic measuring instrument will change during the flight of the drone. Therefore, a transfer matrix method is used for all attitude data, and the attitude information is used to unify all measured magnetic field signals into the same coordinate system.

[0126] Step 5: Use the magnetic field data generated by the leakage channel of the levee at different positions at the same height to draw the magnetic field contour map and the ratio response map to obtain the location of the leakage channel of the levee. According to the distribution of the magnetic field, the dense distribution of the magnetic field should be the approximate location of the leakage channel. The same operation is performed on each height data, and the magnetic field data at different heights are combined to obtain more accurate magnetic field distribution information. And according to the magnetic field at different heights, the magnetic field contour map in space can be drawn. And according to the magnetic field at different heights, the magnetic field contour map in space can be drawn. According to the environmental information taken by the drone, the levee is modeled and the normal field value of the levee is simulated. Comparing the measured value after correction of interference with the value of the normal field to obtain the ratio response map, the location of the leakage channel can be accurately obtained.

[0127] Beneficial effects of this method: It is not easy to perform magnetic field detection in paddy fields, swamps, water surfaces and other areas using existing handheld weak magnetic detectors, which will result in missing data at the measuring points. The weak magnetic detection method based on drones can overcome this problem and achieve magnetic field detection at all measuring points in the measuring area. When performing weak magnetic detection based on drones, it is possible to achieve magnetic detection of measuring points at the same longitude and latitude but different altitudes by changing the flight altitude of the drone, and on this basis, realize magnetic gradient tensor calculation to further improve the positioning accuracy of the leakage channel.

[0128] In the prior art, a handheld weak magnetic detector is used to detect the leakage channels of dikes. It is necessary to measure each measuring point one by one for a large number of measuring points, resulting in low efficiency. It takes a long time to complete the magnetic field detection of all measuring points. During this period, the water level of the river, the shape of the leakage channel, etc. may change greatly, leading to changes in the magnetic field at each measuring point above the dike, seriously restricting the real-time performance and accuracy of the leakage channel detection. Using multiple drones to conduct weak magnetic detection simultaneously can greatly improve the detection efficiency and the accuracy of leakage channel positioning. At the same time, when processing the magnetic field data, it is necessary to measure the size parameters such as the length, width, and slope of the dike and establish a dike model. The method of using drone photography to construct a three-dimensional dike model has the characteristics of fast measurement and modeling speed and high accuracy. However, when the drone is flying with a magnetic sensor, there will be shaking and jitter phenomena, resulting in changes in the attitude of the magnetic sensor. An attitude sensor is used to monitor the attitude changes of the magnetic sensor in real time, and a transformation matrix is used to unify all attitude information into the same coordinate system, thereby realizing the attitude correction of the magnetic field data. When performing attitude correction, there will be a problem of unsynchronized time between the attitude data and the magnetic field data, greatly reducing the effectiveness of the attitude correction. This patent uses the least squares method and maximum likelihood estimation to solve this problem. After networking, the drones can transmit data to each other. The drone farthest from the mobile terminal can send the data to the mobile terminal through the relay of other drones. In this way, it is not necessary for the drone to have long-distance wireless transmission capabilities, which can reduce power consumption and extend the flight time of the drone.

[0129] See Figure 2 As shown, based on the same inventive concept as the method real-time example, an embodiment of the present application provides a dike leakage detection device, which includes:

[0130] A magnetic field information acquisition module, which is used to acquire the magnetic field distribution information of the target dike with a current loop at different heights;

[0131] A wire diagram acquisition module, which is used to acquire a three-dimensional magnetic field contour map of the target dike with the current loop based on the magnetic field distribution information at different heights;

[0132] A response diagram acquisition module, which is used to acquire a ratio response diagram of the target dike based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map;

[0133] A position determination module, which is used to determine the leakage channel position of the target dike based on the ratio response diagram.

[0134] The device places the current loop at the target levee, then obtains the magnetic field distribution information at different heights from the target levee, and generates a three-dimensional magnetic field contour map and a ratio response map based on the magnetic field distribution information at different heights, and determines the position of the leakage channel of the target levee according to the ratio response. Since the magnetic field data directly excited by the current is used in this application to determine the leakage channel of the target levee, more stable and reliable measurement results can be obtained compared with manual inspection and geological drilling.

[0135] It should be noted that for the levee leakage detection device provided in the embodiments of this application, its corresponding technical problems, technical means, and technical effects are similar to the principles of the levee leakage detection method at the principle level.

[0136] In a second aspect, the embodiments of this application provide a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the levee leakage detection method mentioned in the first aspect is implemented.

[0137] In a third aspect, the embodiments of this application provide an electronic device, including a memory and a processor. A computer program is stored on the memory and runs on the processor. When the processor executes the computer program, the levee leakage detection method mentioned in the first aspect is implemented.

[0138] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the element.

[0139] The above are only specific implementation manners of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for detecting dike leakage, characterized in that, The method includes the following steps: Obtain the magnetic field distribution information of the target levee with a current loop at different heights; Based on the magnetic field distribution information at different heights, obtain the three-dimensional magnetic field contour map of the target levee with a current loop; Based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map, obtain the ratio response map of the target levee; Based on the ratio response map, determine the leakage channel position of the target levee; The obtaining of the magnetic field distribution information of the target levee with a current loop at different heights includes the following steps: Use a magnetic field measuring instrument to obtain the magnetic field distribution information of the target levee; Respectively obtain the position information and attitude information of the magnetic field measuring instrument; Based on the magnetic field distribution information, the attitude information, and the position information, obtain the magnetic field distribution table information; Before obtaining the three-dimensional magnetic field contour map of the target levee with a current loop based on the magnetic field distribution information at different heights, the following steps are included: Based on the target position information, obtain the target height information; Match all the attitude information and magnetic field distribution information corresponding to the target height information in the magnetic field distribution table information; Adjust the reference coordinate systems of all the attitude information to be consistent, and synchronously adjust the magnetic field distribution information corresponding to the attitude information; The way for the magnetic field measuring instrument to obtain the magnetic field distribution information is to use a drone to carry the magnetic field measuring instrument to different positions at different heights, so that the magnetic field measuring instrument obtains the magnetic field distribution information at different heights and different positions; The obtaining of the three-dimensional magnetic field contour map of the target levee with a current loop based on the magnetic field distribution information at different heights includes the following steps: Respectively obtain the magnetic field distribution information at different heights; Based on the magnetic field distribution information at each different height and the magnetic gradient tensor method, obtain the gradient tensor matrix; Based on the gradient tensor matrix, obtain the three-dimensional magnetic field contour map of the target levee with a current loop; The obtaining of the ratio response map of the target levee based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map includes the following steps: Based on the three-dimensional magnetic field contour map and the simulated three-dimensional magnetic field contour map, obtain the ratio of the three-dimensional magnetic field contour maps; Based on the ratio of the three-dimensional magnetic field contour maps, obtain the ratio response map of the target levee.

2. The method for detecting dike leakage according to claim 1, characterized in that Before obtaining the magnetic field distribution information of the target levee with a current loop at different heights, the following steps are included: Insert the first electrode into the water outlet of the leakage channel of the target levee, and then place the second electrode at a preset distance from the water outlet position; Under the action of the excitation power supply, form a current loop based on the first electrode and the second electrode.

3. The dike leakage detection method according to claim 1, characterized in that, The determining of the leakage channel position of the target levee based on the ratio response map includes the following steps: Obtain the color information of the ratio response map; Select the darkest color information from the color information; Determine the ridge line from the area corresponding to the darkest color information, and determine the ridge line as the leakage channel position of the target levee.

4. A device for detecting dike leakage, which uses the dike leakage detection method described in any one of claims 1-3 for detection, and is characterized in that, The device includes: A magnetic field information acquisition module, which is used to acquire the magnetic field distribution information of a target dike with a current loop placed at different heights; An isogram acquisition module, which is used to acquire a three-dimensional magnetic field isogram of the target dike with the current loop based on the magnetic field distribution information at different heights; A ratio response map acquisition module, which is used to acquire a ratio response map of the target dike based on the three-dimensional magnetic field isogram and the simulated three-dimensional magnetic field isogram; A position determination module, which is used to determine the leakage channel position of the target dike based on the ratio response map.

5. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the method described in any one of claims 1 to 3 is implemented.

6. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the method described in any one of claims 1 to 3 is implemented.

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