Three-phase cable positioning method and device, storage medium and electronic equipment

Abstract

The invention relates to a three-phase cable positioning method and device, a storage medium and electronic equipment, and aims to efficiently position a three-phase cable by using a small number of magnetic field sensors and reduce the calculation complexity and cost. The method comprises the following steps: respectively acquiring instantaneous magnetic field components of a to-be-detected three-phase cable in a preset power frequency period based on a first magnetic field sensor, a second magnetic field sensor and a third magnetic field sensor; adjusting the direction of each magnetic field sensor in the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor to enable the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor to be 0; the overall positions of the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are adjusted, so that instantaneous resultant magnetic field amplitudes corresponding to the first magnetic field sensor and the third magnetic field sensor are equal; and determining the laying depth of the to-be-measured three-phase cable according to the instantaneous magnetic field components corresponding to the first magnetic field sensor and the second magnetic field sensor respectively.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power equipment detection, and in particular to a three-phase cable positioning method, device, storage medium and electronic equipment. Background Art

[0002] At present, power cables are widely used in the field of power transmission and distribution. For urban power transmission and distribution grid power cables, they are usually laid within a few meters underground. For offshore wind power transmission cables, they are usually laid within a few meters below the seabed. When a cable fails, it is necessary to quickly find the fault point. However, after the power cable is laid underground or under the seabed, it cannot be directly observed visually. Therefore, it is very important to accurately obtain the laying path and depth of the power cable.

[0003] Among them, power cables generally include single-phase cables and three-phase cables. For single-phase cables, since their magnetic field distribution is relatively simple, the direction and depth of single-phase cables can be located using relevant magnetic field formulas and the right-hand screw rule. For three-phase cables, since the current phase difference between the three-phase conductors is 120°, the magnetic field generated at any point in space is the superposition of the magnetic fields of the three-phase conductors. The magnetic field distribution law is more complex than that of single-phase conductors, and its positioning is also more difficult.

[0004] In the related art, five magnetic field sensors are used to measure the synthetic magnetic field amplitude of the three-phase cable at five positions in space, and a certain geometric relationship is used to calculate the laying direction and depth of the three-phase cable. A large number of magnetic field sensors are used, and only the amplitude information of the synthetic magnetic field is used. The calculation method is relatively complex and the cost is high. Summary of the invention

[0005] The purpose of the present disclosure is to provide a three-phase cable positioning method, device, storage medium and electronic device to solve the problems in the related art.

[0006] In order to achieve the above objectives, in a first aspect, the present disclosure provides a three-phase cable positioning method, the method comprising: Based on the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, respectively obtain the instantaneous magnetic field components of the three-phase cable to be tested within a preset power frequency period, wherein the instantaneous magnetic field components include the instantaneous magnetic field components in the x-axis direction, the instantaneous magnetic field components in the y-axis direction and the instantaneous magnetic field components in the z-axis direction, and the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction at an equal preset spacing; By adjusting the direction of each magnetic field sensor among the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0; By adjusting the overall positions of the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, the instantaneous synthetic magnetic field amplitudes respectively corresponding to the first magnetic field sensor and the third magnetic field sensor are equal; The laying depth of the three-phase cable to be tested is determined according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor.

[0007] Optionally, determining the laying depth of the three-phase cable to be tested according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor includes: Determine the angles formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor; The laying depth of the three-phase cable to be tested is determined according to the included angle and the preset distance between the first magnetic field sensor and the second magnetic field sensor.

[0008] Optionally, when the amplitude of the instantaneous magnetic field component in the z-axis direction is 0, the instantaneous synthetic magnetic field amplitude is determined by the following calculation formula:

[0009] in, is the instantaneous synthetic magnetic field amplitude, B x ( t ) is the x The instantaneous magnetic field component in the axial direction, B y ( t ) is the y The instantaneous magnetic field component in the axial direction, t For time.

[0010] Optionally, the laying depth of the three-phase cable to be tested is determined by the following calculation formula:

[0011] in, is the laying depth of the three-phase cable to be tested, is a preset distance between the first magnetic field sensor and the second magnetic field sensor, is the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor.

[0012] Optionally, the method may include: When the amplitude of the magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, it is determined that the laying direction of the three-phase cable to be tested is parallel to the z-axis.

[0013] In a second aspect, the present disclosure provides a three-phase cable positioning device, the device comprising: An acquisition module, used to acquire instantaneous magnetic field components of the three-phase cable to be tested within a preset power frequency period based on a first magnetic field sensor, a second magnetic field sensor, and a third magnetic field sensor, respectively, wherein the instantaneous magnetic field components include instantaneous magnetic field components in the x-axis direction, instantaneous magnetic field components in the y-axis direction, and instantaneous magnetic field components in the z-axis direction, and the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction at equal preset intervals; a first adjustment module, configured to adjust the direction of each of the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor so that the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0; a second adjustment module, configured to adjust the overall positions of the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor so that the instantaneous synthetic magnetic field amplitudes respectively corresponding to the first magnetic field sensor and the third magnetic field sensor are equal; The first determination module is used to determine the laying depth of the three-phase cable to be tested according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor.

[0014] Optionally, the first determining module is used to: Determine, according to the instantaneous magnetic field components corresponding to the first magnetic field sensor and the second magnetic field sensor, the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor; The laying depth of the three-phase cable to be tested is determined according to the included angle and the preset distance between the first magnetic field sensor and the second magnetic field sensor.

[0015] Optionally, the device includes a second determining module, configured to: When the amplitude of the magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, it is determined that the laying direction of the three-phase cable to be tested is parallel to the z-axis.

[0016] In a third aspect, the present disclosure further provides a non-temporary computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods described in the first aspect.

[0017] In a fourth aspect, the present disclosure further provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of any one of the methods in the first aspect.

[0018] Through the above technical solution, based on the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, the instantaneous magnetic field component of the three-phase cable to be tested in the preset power frequency cycle is obtained respectively, the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction according to equal preset spacing, by adjusting the direction of each magnetic field sensor in the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, so that the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, by adjusting the overall position of the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, so that the instantaneous synthetic magnetic field amplitudes corresponding to the first magnetic field sensor and the third magnetic field sensor are equal, according to the instantaneous magnetic field components corresponding to the first magnetic field sensor and the second magnetic field sensor, the laying depth of the three-phase cable to be tested is determined. Among them, three magnetic field sensors are used, and the laying depth of the three-phase cable is determined by adjusting the direction of each magnetic field sensor and the overall position of the three magnetic field sensors, so that a small number of magnetic field sensors can be used to efficiently locate the three-phase cable, and reduce the calculation complexity and cost.

[0019] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 The figure is a flow chart of a three-phase cable locating method according to an exemplary embodiment of the present disclosure.

[0021] Figure 2 It is a schematic diagram of a magnetic field generated by a three-phase cable at any point in space according to an exemplary embodiment of the present disclosure.

[0022] Figure 3 The figure is a schematic diagram showing the relative position relationship between a three-phase cable and a magnetic field sensor according to an exemplary embodiment of the present disclosure.

[0023] Figure 4 It is a schematic diagram showing the variation of the amplitudes of the magnetic field components in the x-axis and y-axis directions and the instantaneous synthetic magnetic field amplitude with the phase measured by the first magnetic field sensor according to an exemplary embodiment of the present disclosure.

[0024] Figure 5It is a schematic diagram showing the variation of the x-axis and y-axis magnetic field component amplitudes and the instantaneous synthetic magnetic field amplitude with the phase measured by the second magnetic field sensor according to an exemplary embodiment of the present disclosure.

[0025] Figure 6 The figure is a block diagram of a three-phase cable locating device according to an exemplary embodiment of the present disclosure.

[0026] Figure 7 It is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0028] As mentioned in the background technology, in the related art, five magnetic field sensors are used to measure the synthetic magnetic field amplitude of the three-phase cable at five positions in space, and a certain geometric relationship is used to calculate the laying direction and depth of the three-phase cable. A large number of magnetic field sensors are used, and only the amplitude information of the synthetic magnetic field is used. The calculation method is relatively complicated and the cost is high.

[0029] In view of this, the embodiments of the present disclosure provide a three-phase cable positioning method, device, storage medium and electronic device, which can use a small number of magnetic field sensors to efficiently position the three-phase cable and reduce calculation complexity and cost.

[0030] Figure 1 FIG. 1 is a flow chart of a three-phase cable positioning method according to an exemplary embodiment of the present disclosure. Figure 1 , the method comprises the following steps: Step S101: Based on the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, the instantaneous magnetic field components of the three-phase cable to be tested within a preset power frequency period are respectively obtained, and the instantaneous magnetic field components include instantaneous magnetic field components in the x-axis direction, instantaneous magnetic field components in the y-axis direction and instantaneous magnetic field components in the z-axis direction. The first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction at equal preset intervals.

[0031] It should be understood that the magnetic field sensor may include three orthogonally arranged sensors capable of measuring instantaneous magnetic field components in three directions, namely, the x-axis, the y-axis and the z-axis. When the three-phase cable is energized, an alternating magnetic field is generated, and these magnetic field components can be detected by the magnetic field sensor.

[0032] It should also be understood that the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor can be arranged in a straight line from left to right in the horizontal direction at equal preset intervals. This horizontally equidistantly arranged magnetic field sensor array has better symmetry, which is conducive to simplifying the analysis of the magnetic field distribution generated by the cable, and can reduce calculation complexity, thereby helping to improve the reliability of three-phase cable positioning.

[0033] Step S102 : adjusting the direction of each magnetic field sensor among the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor so that the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0.

[0034] In a possible implementation manner, when the amplitude of the magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, it can be determined that the laying direction of the three-phase cable to be tested is parallel to the z-axis.

[0035] It should be understood that when the z-axis magnetic field component of each magnetic field sensor is 0, it can be determined that the laying direction of the three-phase cable is parallel to the z-axis in the measurement coordinate system, that is, the length direction of the three-phase cable is parallel to the z-axis of the measurement coordinate system. In this way, the magnetic field interference in the z-axis direction can be eliminated, and the reliability of the three-phase cable positioning can be improved.

[0036] Step S103: adjusting the overall positions of the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor so that the instantaneous synthetic magnetic field amplitudes corresponding to the first magnetic field sensor and the third magnetic field sensor are equal.

[0037] It should be understood that when the instantaneous synthetic magnetic field amplitudes corresponding to the first magnetic field sensor and the third magnetic field sensor are equal, it means that the distances from the two magnetic field sensors to the three-phase cable to be tested are equal. In other words, the horizontal distances from the first magnetic field sensor and the third magnetic field sensor to the three-phase cable to be tested are equal, and the three-phase cable is directly below the second magnetic field sensor among the three magnetic field sensors, which helps to improve the accuracy of positioning the three-phase cable to be tested.

[0038] Step S104: determining the laying depth of the three-phase cable to be tested according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor.

[0039] It should be understood that in the power system, the magnetic field generated by power equipment and cables is mainly concentrated near the 50Hz power frequency. In order to retain only the 50Hz power frequency magnetic field component, a 50Hz narrowband filter can be set at the output end of the relevant magnetic field sensor to filter out the magnetic field interference and retain only the power frequency magnetic field.

[0040] For example, the type of filter may be a digital filter such as a Butterworth, Chebyshev or elliptic filter, which is not limited in the embodiments of the present disclosure.

[0041] In the above manner, based on the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, the instantaneous magnetic field component of the three-phase cable to be tested in the preset power frequency period is obtained respectively, the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction according to equal preset spacing, by adjusting the direction of each magnetic field sensor in the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, so that the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, by adjusting the overall position of the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, so that the instantaneous synthetic magnetic field amplitudes corresponding to the first magnetic field sensor and the third magnetic field sensor are equal, according to the instantaneous magnetic field components corresponding to the first magnetic field sensor and the second magnetic field sensor, the laying depth of the three-phase cable to be tested is determined. Among them, by using three magnetic field sensors, by adjusting the direction of each magnetic field sensor and the overall position of the three magnetic field sensors to determine the laying depth of the three-phase cable, a small number of magnetic field sensors can be used to efficiently locate the three-phase cable, and reduce the calculation complexity and cost.

[0042] Figure 2 is a schematic diagram of a magnetic field generated by a three-phase cable at any point in space according to an exemplary embodiment of the present disclosure, referring to Figure 2 , for an infinitely long three-phase cable, the magnetic field generated at any point in space can be expressed by the following calculation formulas (1) and (2): (1) (2) in, R is the radius of the circle formed by the three conductors of the three-phase cable, μ is the magnetic permeability, I is the three-phase cable current amplitude, is the angular frequency, α is the distance between any point in space and the cable x The angle formed by the axis direction, r is the distance from a point in space to the center of the three-phase cable, , B x ( t )for x The instantaneous magnetic field in the axial direction, B y ( t )for y The instantaneous magnetic field in the axial direction, t For time.

[0043] In a possible implementation, when the amplitude of the instantaneous magnetic field component in the z-axis direction is 0, the instantaneous synthetic magnetic field amplitude is determined by the following calculation formula (3): (3) in, is the instantaneous synthetic magnetic field amplitude, B x ( t )for x The instantaneous magnetic field component in the axial direction, B y ( t )for y The instantaneous magnetic field component in the axial direction, t For time.

[0044] For example, by combining equations (1) and (2), the instantaneous synthetic magnetic field amplitude can be determined by the following equation (4): (4) in, is the instantaneous synthetic magnetic field amplitude, μ is the magnetic permeability, I is the three-phase cable current amplitude, R is the radius of the circle formed by the three conductors of the three-phase cable, r is the distance from a point in space to the center of the three-phase cable, .

[0045] It should be understood that the magnetic field generated by a three-phase cable at any point in space has the following characteristics: 1) x Axis direction and y The peak values ​​of the magnetic field components in the axial direction are the same; 2) the instantaneous synthetic magnetic field amplitude does not change with time; 3) x Peak value of axial magnetic field component, y The peak value of the axial magnetic field component and the instantaneous synthetic magnetic field amplitude are equal and are inversely proportional to the square of the distance from the point to the center of the three-phase cable.

[0046] In a possible implementation, determining the laying depth of the three-phase cable to be tested according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor may include: Determine the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor; The laying depth of the three-phase cable to be tested is determined according to the included angle and the preset distance between the first magnetic field sensor and the second magnetic field sensor.

[0047] Figure 3is a schematic diagram showing the relative position relationship between a three-phase cable and a magnetic field sensor according to an exemplary embodiment of the present disclosure, with reference to Figure 3 , the first magnetic field sensor 1, the second magnetic field sensor 2 and the third magnetic field sensor 3 are arranged in a straight line from left to right in the horizontal direction at an equal preset spacing d, and when the instantaneous synthetic magnetic field intensity amplitudes measured by the first magnetic field sensor 1 and the third magnetic field sensor 3 are equal, it is satisfied r 1= r 3. The three-phase cable 4 is located directly below the second magnetic field sensor 2. The straight-line distance H between the second magnetic field sensor and the three-phase cable 4 is the laying depth of the three-phase cable 4.

[0048] It should be understood that according to the characteristics of the magnetic field generated by the three-phase cable in space, it can be known that the magnetic field generated by the three-phase cable at any point in space x Peak value of axial magnetic field component, y The peak value of the axial magnetic field component and the instantaneous synthetic magnetic field amplitude are equal and are inversely proportional to the square of the distance from the point to the center of the three-phase cable. From this, the angle formed between the three-phase cable 4 and the first magnetic field sensor 1 and the second magnetic field sensor 2 can be calculated. .

[0049] For example, the cosine function of the angle γ can be determined by the following calculation formula (5): (5) in, is the cosine function of the angle γ, γ is the angle formed between the three-phase cable 4 and the first magnetic field sensor 1 and the second magnetic field sensor 2, is a first distance between the three-phase cable 4 and the first magnetic field sensor 1, is a second distance between the three-phase cable 4 and the second magnetic field sensor 2 .

[0050] And, the first distance The second distance The ratio relationship between them can be determined by the following calculation formula (6): (6) in, is a first distance between the three-phase cable 4 and the first magnetic field sensor 1, is a second distance between the three-phase cable 4 and the second magnetic field sensor 2, is the first magnetic field sensor 1 x The peak value of the axial magnetic field component, is the first magnetic field sensor 1 y The peak value of the axial magnetic field component, is the second magnetic field sensor 2 x The peak value of the axial magnetic field component, is the second magnetic field sensor 2 y The peak value of the axial magnetic field component, is the instantaneous synthetic magnetic field amplitude corresponding to the first magnetic field sensor 1, is the instantaneous synthetic magnetic field amplitude corresponding to the second magnetic field sensor 2.

[0051] For example, the angle It can be determined by any of the following calculation formulas (7), (8), (9), (10) and (11): (7) (8) (9) (10) (11) in, is the angle formed between the three-phase cable 4 and the first magnetic field sensor 1 and the second magnetic field sensor 2, is the first magnetic field sensor 1 x The peak value of the axial magnetic field component, is the first magnetic field sensor 1 y The peak value of the axial magnetic field component, is the second magnetic field sensor 2 x The peak value of the axial magnetic field component, is the second magnetic field sensor 2 y The peak value of the axial magnetic field component, is the instantaneous synthetic magnetic field amplitude corresponding to the first magnetic field sensor 1, is the instantaneous synthetic magnetic field amplitude corresponding to the second magnetic field sensor 2.

[0052] In a possible implementation manner, the laying depth of the three-phase cable to be tested is determined by the following calculation formula (12): (12) in, is the laying depth of the three-phase cable to be tested, is a preset distance between the first magnetic field sensor and the second magnetic field sensor, is the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor.

[0053] It should be understood that the positional relationship between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor can form a right triangle. Combined with the calculation formula of trigonometric functions, the laying depth of the three-phase cable to be tested can be calculated, providing important reference data for the safe operation of the cable.

[0054] In one embodiment, it is known that the current peak value of the three-phase conductors in the three-phase cable to be tested is 300A, the phase difference is 120°, the radius of the circle formed by the center of the three-phase conductors is 0.1m, the magnetic field sensors are all located on the horizontal plane 3m above the three-phase cable (that is, the actual laying depth is 3m), the horizontal distance between the first magnetic field sensor and the second magnetic field sensor is 0.5m, and the horizontal distance between the second magnetic field sensor and the third magnetic field sensor is also 0.5m. At this time, z The amplitude of the magnetic field component of the axis is 0, and the laying direction of the three-phase cable is the same as z Axis parallel.

[0055] Figure 4 is measured by the first magnetic field sensor according to an exemplary embodiment of the present disclosure x axis, y Schematic diagram of the change of the axial magnetic field component amplitude and the instantaneous synthetic magnetic field amplitude with the phase, refer to Figure 4 , x The axial magnetic field component and y The phase difference of the magnetic field components in the axial direction is 90°. x Peak value of axial magnetic field component, y The peak value of the magnetic field component in the axial direction is equal to the instantaneous synthetic magnetic field amplitude, which is 973.27nT.

[0056] Figure 5 is measured by a second magnetic field sensor according to an exemplary embodiment of the present disclosure x axis, y Schematic diagram of the change of the axial magnetic field component amplitude and the instantaneous synthetic magnetic field amplitude with the phase, refer to Figure 5 , x The axial magnetic field component and y The phase difference of the magnetic field components in the axial direction is 90°. x Peak value of axial magnetic field component, y The peak value of the magnetic field component in the axial direction is equal to the instantaneous synthetic magnetic field amplitude, which is 1000.57nT.

[0057] Therefore, the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor can be determined by the above-mentioned calculation formula related to the laying depth of the three-phase cable. It is 9.51°, and the laying depth of the three-phase cable is 2.98m. The error between this and the actual laying depth of 3m is only 0.67%, which has high accuracy.

[0058] Figure 6 is a block diagram of a three-phase cable positioning device 600 according to an exemplary embodiment of the present disclosure, referring to Figure 6 , the three-phase cable positioning device 600 comprises: An acquisition module 601 is used to respectively acquire instantaneous magnetic field components of the three-phase cable to be tested within a preset power frequency period based on a first magnetic field sensor, a second magnetic field sensor, and a third magnetic field sensor, wherein the instantaneous magnetic field components include instantaneous magnetic field components in the x-axis direction, instantaneous magnetic field components in the y-axis direction, and instantaneous magnetic field components in the z-axis direction, and the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction at equal preset intervals; A first adjustment module 602 is used to adjust the direction of each magnetic field sensor among the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor so that the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0; The second adjustment module 603 is used to adjust the overall positions of the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor so that the instantaneous synthetic magnetic field amplitudes corresponding to the first magnetic field sensor and the third magnetic field sensor are equal; The first determination module 604 is used to determine the laying depth of the three-phase cable to be tested according to the instantaneous magnetic field components corresponding to the first magnetic field sensor and the second magnetic field sensor respectively.

[0059] Optionally, the first determining module 604 is used to: Determine the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor according to the instantaneous magnetic field components corresponding to the first magnetic field sensor and the second magnetic field sensor; The laying depth of the three-phase cable to be tested is determined according to the included angle and the preset distance between the first magnetic field sensor and the second magnetic field sensor.

[0060] Optionally, the three-phase cable locating device 600 includes a second determining module, configured to: When the amplitude of the magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, it is determined that the laying direction of the three-phase cable to be tested is parallel to the z-axis.

[0061] It should be understood that the above three-phase cable positioning device can determine the laying depth of the three-phase cable by adjusting the position and direction of the three magnetic field sensors and combining the instantaneous magnetic field component information. The magnetic field sensor can provide necessary data for the corresponding module, and each module is responsible for processing the data and adjusting the magnetic field sensor to achieve the positioning function.

[0062] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0063] Figure 7 FIG. 7 is a block diagram of an electronic device 700 according to an exemplary embodiment. Figure 7As shown, the electronic device 700 may include: a processor 701 , a memory 702 . The electronic device 700 may also include one or more of a multimedia component 703 , an input / output (I / O) interface 704 , and a communication component 705 .

[0064] The processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above-mentioned three-phase cable positioning method. The memory 702 is used to store various types of data to support the operation of the electronic device 700, and these data may include, for example, instructions for any application or method used to operate on the electronic device 700, and application-related data. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving an external audio signal. The received audio signal may be further stored in the memory 702 or sent through the communication component 705. The audio component also includes at least one speaker for outputting an audio signal. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the above-mentioned other interface modules may be a keyboard, a mouse, a button, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 705 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0065] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned three-phase cable locating method.

[0066] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned three-phase cable locating method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 702 including program instructions, and the above-mentioned program instructions can be executed by the processor 701 of the electronic device 700 to complete the above-mentioned three-phase cable locating method.

[0067] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0069] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A three-phase cable positioning method, characterized in that: The method comprises: Based on the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, respectively obtain the instantaneous magnetic field components of the three-phase cable to be tested within a preset power frequency period, wherein the instantaneous magnetic field components include the instantaneous magnetic field components in the x-axis direction, the instantaneous magnetic field components in the y-axis direction and the instantaneous magnetic field components in the z-axis direction, and the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction at an equal preset spacing; By adjusting the direction of each magnetic field sensor among the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0; By adjusting the overall positions of the first magnetic field sensor, the second magnetic field sensor and the third magnetic field sensor, the instantaneous synthetic magnetic field amplitudes respectively corresponding to the first magnetic field sensor and the third magnetic field sensor are equal; The laying depth of the three-phase cable to be tested is determined according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor.

2. The method according to claim 1, characterized in that The step of determining the laying depth of the three-phase cable to be tested according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor comprises: Determine the angles formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor; The laying depth of the three-phase cable to be tested is determined according to the included angle and the preset distance between the first magnetic field sensor and the second magnetic field sensor.

3. The method according to claim 1, characterized in that: When the amplitude of the instantaneous magnetic field component in the z-axis direction is 0, the instantaneous synthetic magnetic field amplitude is determined by the following calculation formula: in, is the instantaneous synthetic magnetic field amplitude, B x ( t ) is the x The instantaneous magnetic field component in the axial direction, B y ( t ) is the y The instantaneous magnetic field component in the axial direction, t For time.

4. The method according to claim 2, characterized in that: The laying depth of the three-phase cable to be tested is determined by the following calculation formula: in, is the laying depth of the three-phase cable to be tested, is a preset distance between the first magnetic field sensor and the second magnetic field sensor, is the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor.

5. The method according to claim 1, characterized in that The method comprises: When the amplitude of the magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, it is determined that the laying direction of the three-phase cable to be tested is parallel to the z-axis.

6. A three-phase cable positioning device, characterized in that: The device comprises: An acquisition module, used to acquire instantaneous magnetic field components of the three-phase cable to be tested within a preset power frequency period based on a first magnetic field sensor, a second magnetic field sensor, and a third magnetic field sensor, respectively, wherein the instantaneous magnetic field components include instantaneous magnetic field components in the x-axis direction, instantaneous magnetic field components in the y-axis direction, and instantaneous magnetic field components in the z-axis direction, and the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor are arranged in a straight line from left to right in the horizontal direction at equal preset intervals; a first adjustment module, configured to adjust the direction of each of the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor so that the amplitude of the instantaneous magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0; a second adjustment module, configured to adjust the overall positions of the first magnetic field sensor, the second magnetic field sensor, and the third magnetic field sensor so that the instantaneous synthetic magnetic field amplitudes respectively corresponding to the first magnetic field sensor and the third magnetic field sensor are equal; The first determination module is used to determine the laying depth of the three-phase cable to be tested according to the instantaneous magnetic field components respectively corresponding to the first magnetic field sensor and the second magnetic field sensor.

7. The device according to claim 6, characterized in that The first determining module is used for: Determine, according to the instantaneous magnetic field components corresponding to the first magnetic field sensor and the second magnetic field sensor, the angle formed between the three-phase cable to be tested and the first magnetic field sensor and the second magnetic field sensor; The laying depth of the three-phase cable to be tested is determined according to the included angle and the preset distance between the first magnetic field sensor and the second magnetic field sensor.

8. The device according to claim 6, characterized in that The device comprises a second determining module, configured to: When the amplitude of the magnetic field component in the z-axis direction corresponding to each magnetic field sensor is 0, it is determined that the laying direction of the three-phase cable to be tested is parallel to the z-axis.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

10. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 5.

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