Current magnetic source inversion positioning method and device based on single-direction magnetic field gradient

Abstract

The embodiment of the present specification provides a current magnetic source inversion positioning method and device based on a single-direction magnetic field gradient, wherein the current magnetic source inversion positioning method based on the single-direction magnetic field gradient comprises: determining a fluxgate probe, determining an auxiliary test tool based on the fluxgate probe; wherein the auxiliary test tool comprises a two-dimensional grid; collecting magnetic field data through the fluxgate probe based on the two-dimensional grid; determining magnetic field gradient data based on the magnetic field data, and determining current density distribution based on the magnetic field gradient data; and determining current magnetic source position information based on the current density distribution. By collecting magnetic field data through the fluxgate probe based on the two-dimensional grid, determining magnetic field gradient data based on the magnetic field data, and determining current density distribution based on the magnetic field gradient data, and determining current magnetic source position information based on the current density distribution, the diagnosis of the internal current state of the equipment and the judgment of the abnormal current value can be realized.

Description

TECHNICAL FIELD

[0001] Embodiments of the present specification relate to the technical field of electromagnetic measurement, and in particular to a current magnetic source inversion positioning method based on a single-direction magnetic field gradient. BACKGROUND

[0002] With the development of electronic devices towards miniaturization and integration, the current distribution inside the devices becomes more and more complex, and the traditional current measurement methods often cannot meet the requirements of high precision and high efficiency. The traditional current measurement methods mainly include using current clamps or direct measurement methods, which have many limitations in practical applications.

[0003] Firstly, when using a current clamp to measure the current, the current clamp needs to be clamped on the wire, which may not be applicable in some specific situations, especially when the current inside the device or the area that is difficult to access needs to be measured. In addition, the measurement range of the current clamp is limited, and the measurement accuracy of the current clamp will be affected for large current or high frequency current signals.

[0004] Secondly, the method of directly measuring the current usually needs to connect a resistor or ammeter in series in the circuit, and the current value is calculated by measuring the voltage across the resistor or the reading of the ammeter. However, this method needs to open the device shell and modify the circuit, which is not only cumbersome to operate, but also may affect the normal operation of the device. More importantly, the method of directly measuring the current cannot provide detailed information of the current distribution, and it is difficult to meet the demand of accurate analysis of the current magnetic source.

[0005] Therefore, a better solution is needed. SUMMARY

[0006] In view of this, the present specification provides a current magnetic source inversion positioning method based on a single-direction magnetic field gradient. One or more embodiments of the present specification also relate to a current magnetic source inversion positioning device based on a single-direction magnetic field gradient, a computing device, a computer-readable storage medium, and a computer program to solve the technical defects in the prior art.

[0007] According to a first aspect of the embodiments of the present specification, a current magnetic source inversion positioning method based on a single-direction magnetic field gradient is provided, comprising:

[0008] determining a fluxgate probe, and determining an auxiliary test tool based on the fluxgate probe; wherein the auxiliary test tool comprises a two-dimensional grid;

[0009] collecting magnetic field data by the fluxgate probe based on the two-dimensional grid;

[0010] determining magnetic field gradient data based on the magnetic field data, and determining current density distribution based on the magnetic field gradient data;

[0011] The current magnetic source position information is determined based on the current density distribution.

[0012] In a possible implementation, determining a fluxgate probe includes:

[0013] Determine the probe type, sensitivity information, and sampling rate information;

[0014] Two fluxgate probes are determined based on probe type, sensitivity information, and sampling rate information; and a distance between the two fluxgate probes is adjustable.

[0015] In one possible implementation, the auxiliary test fixture includes a platform structure and a two-dimensional grid;

[0016] The platform structure includes pillars;

[0017] The platform is set up above the device to be tested, and the platform height is adjustable;

[0018] A two-dimensional grid is set on the platform.

[0019] In one possible implementation, magnetic field data is collected using a fluxgate probe based on a two-dimensional grid, including:

[0020] In the odd-numbered rows of the two-dimensional grid, magnetic field data of the first cell is collected from the device under test in the first order through a fluxgate probe;

[0021] In the even-numbered rows of the two-dimensional grid, magnetic field data of the second cell is collected from the device under test through the fluxgate probe in the second order;

[0022] Magnetic field data is determined based on the first cell magnetic field data and the second cell magnetic field data.

[0023] In one possible implementation, determining the current density distribution based on magnetic field gradient data includes:

[0024] Discretize the continuous space into multiple small cubic units;

[0025] Determine the current density distribution of the small cubic unit based on the magnetic field gradient data;

[0026] The current density distribution is determined based on the current density distribution of a plurality of small cubic units.

[0027] In one possible implementation, determining the current density distribution of the small cubic unit based on magnetic field gradient data includes:

[0028] Determine the linear equations of current density of each small cubic unit based on magnetic field gradient data;

[0029] The current density linear equations are solved numerically to determine the current density distribution of the small cubic unit.

[0030] In a possible implementation, determining the current magnetic source position information based on the current density distribution comprises:

[0031] Determining the display information based on the current density distribution;

[0032] Determining the current magnetic source position information based on the display information.

[0033] According to a second aspect of the embodiments of the present specification, a current magnetic source inversion positioning device based on a single-direction magnetic field gradient is provided, comprising:

[0034] A tool determination module configured to determine a fluxgate probe, and determine an auxiliary test tool based on the fluxgate probe; wherein the auxiliary test tool comprises a two-dimensional grid;

[0035] A data acquisition module configured to acquire magnetic field data through the fluxgate probe based on the two-dimensional grid;

[0036] A current density module configured to determine magnetic field gradient data based on the magnetic field data, and determine a current density distribution based on the magnetic field gradient data;

[0037] A position information module configured to determine current magnetic source position information based on the current density distribution.

[0038] According to a third aspect of the embodiments of the present specification, a computing device is provided, comprising:

[0039] A memory and a processor;

[0040] The memory is configured to store computer executable instructions, and the processor is configured to execute the computer executable instructions, and the computer executable instructions, when executed by the processor, implement the steps of the above-mentioned current magnetic source inversion positioning method based on a single-direction magnetic field gradient.

[0041] According to a fourth aspect of the embodiments of the present specification, a computer readable storage medium is provided, which stores computer executable instructions, and the instructions, when executed by a processor, implement the steps of the above-mentioned current magnetic source inversion positioning method based on a single-direction magnetic field gradient.

[0042] According to a fifth aspect of the embodiments of the present specification, a computer program is provided, wherein when the computer program is executed in a computer, the computer program causes the computer to execute the steps of the above-mentioned current magnetic source inversion positioning method based on a single-direction magnetic field gradient.

[0043] The embodiment of the present specification provides a current magnetic source inversion positioning method and device based on a single-direction magnetic field gradient, wherein the current magnetic source inversion positioning method based on a single-direction magnetic field gradient comprises: determining a fluxgate probe, determining an auxiliary test tool based on the fluxgate probe; wherein the auxiliary test tool comprises a two-dimensional grid; collecting magnetic field data through the fluxgate probe based on the two-dimensional grid; determining magnetic field gradient data based on the magnetic field data, and determining current density distribution based on the magnetic field gradient data; determining current magnetic source position information based on the current density distribution. By collecting magnetic field data through the fluxgate probe based on the two-dimensional grid, determining magnetic field gradient data based on the magnetic field data, and determining current density distribution based on the magnetic field gradient data, and determining current magnetic source position information based on the current density distribution, the diagnosis of the internal current state of the equipment and the judgment of the abnormal current value can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 FIG. 1 is a flowchart of a current magnetic source inversion positioning method based on a single-direction magnetic field gradient provided by an embodiment of the present specification;

[0045] Figure 2 FIG. 2 is a grid measurement point schematic diagram of a current magnetic source inversion positioning method based on a single-direction magnetic field gradient provided by an embodiment of the present specification;

[0046] Figure 3 FIG. 3 is a structural schematic diagram of a current magnetic source inversion positioning device based on a single-direction magnetic field gradient provided by an embodiment of the present specification;

[0047] Figure 4 FIG. 4 is a structural block diagram of a computing device provided by an embodiment of the present specification. DETAILED DESCRIPTION

[0048] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present specification. However, the present specification can be practiced without the specific details that are set forth in the following description, and it is understood that persons having ordinary skill in the art can make and use modifications to the present specification without departing from the scope of the present specification.

[0049] The terms used in one or more embodiments of the present specification are merely for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present specification. The singular forms "a" and "the" used in one or more embodiments of the present specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of the present specification means and includes any or all possible combinations of one or more associated listed items.

[0050] It should be understood that, although the terms first, second, etc. can be employed in this specification to describe various information, these information should not be limited to these terms. These terms are only used to differentiate one piece of information from another piece of information. For example, without departing from the scope of one or more embodiments of the present specification, first can also be referred to as second, and similarly, second can also be referred to as first. Depending on the context, the word "if" as used herein can be interpreted as "when" or "upon" or "in response to determining".

[0051] In the present specification, a current magnetic source inversion positioning method based on a single-direction magnetic field gradient is provided, the present specification also relates to a current magnetic source inversion positioning device based on a single-direction magnetic field gradient, a computing device, and a computer readable storage medium, which are described in detail one by one in the following embodiments.

[0052] Referring to Figure 1 , Figure 1 A flow chart of a current magnetic source inversion positioning method based on a single-direction magnetic field gradient according to one embodiment of the present specification is shown, which specifically includes the following steps.

[0053] Step 101: Determine a fluxgate probe, and determine an auxiliary test tool based on the fluxgate probe; wherein the auxiliary test tool includes a two-dimensional grid.

[0054] In one possible implementation, determining the fluxgate probe includes: determining a probe type, sensitivity information, and sampling rate information; determining two fluxgate probes based on the probe type, the sensitivity information, and the sampling rate information; and the distance between the two fluxgate probes is adjustable.

[0055] In actual application, a suitable three-axis vector fluxgate probe is selected, and the probe distance and tool structure are adjusted according to actual requirements. The probe is fixed on the tool, and is connected to a data collector and a signal processing device through a signal cable. At the same time, the auxiliary test tool is built, and the platform height and the two-dimensional grid size are adjusted.

[0056] Specifically, the following requirements are included in the selection of the probe. Probe type: two three-axis vector fluxgate probes are selected to ensure that the magnetic field components in three orthogonal directions can be measured simultaneously. Sensitivity requirement: the sensitivity of the probe is better than 20 pT / sqrt(Hz)@1 Hz to ensure sufficient measurement accuracy. Sampling rate: the magnetic field sampling rate is greater than 1 kHz to meet the needs of real-time monitoring and measuring high-frequency alternating current. Synchronous acquisition: the two probes have the ability to fully synchronize the acquisition of magnetic field data, with a unified synchronization signal to minimize magnetic field gradient interference. Adjustable spacing: the spacing d between the probes needs to be adjusted according to the size of the device, d = Lmax * c, where Lmax is the maximum size of the device, with the same unit as d, in cm; c is a dimensionless coefficient, with a value range of 3-6.

[0057] In one possible implementation, the auxiliary test tooling includes a platform structure and a two-dimensional grid; the platform structure includes a support column; the platform is erected above the device to be tested, and the height of the platform is adjustable; the two-dimensional grid is arranged on the platform.

[0058] In actual application, during the construction of the test tooling, including tooling design, system connection and auxiliary test tooling design.

[0059] Among them, the tooling design includes: material selection: using non-magnetic materials to make probe tooling, such as red copper, aluminum alloy, titanium alloy, etc. The relative magnetic permeability of the material is less than 1.001, to reduce external interference. Alignment and fixation: align and fix the probes on the tooling to ensure the relative position between the probes is stable. Overall shape: after fixing the probes on the tooling, the overall shape is a cuboid, which is convenient for operation and carrying. Acquisition button: the tooling is equipped with a button for issuing data acquisition instructions. Only within 10s after the button is pressed, the probe matched data collector starts data collection.

[0060] Further, the system connection includes: signal cable: the probe array is connected to the matched data collector and signal processing equipment (computer) through a 2m-5m signal cable, and the distance between the matched data collector and signal processing equipment and the probe array is not less than 1.5m. Data collector: responsible for receiving the magnetic field data collected by the probe and performing preliminary processing. Signal processing equipment: further analyzes and processes the collected data, and inversely calculates the current distribution.

[0061] Further, the auxiliary test tool design includes: a platform structure: design a platform with 4 pillars, which is placed directly above the device to be tested. The distance between the platform and the device can be adjusted within the range of 2-20 cm to adapt to different heights of the device to be tested. Two-dimensional grid: draw a two-dimensional grid on the platform, with the smallest grid being a 1 cm square. These grids are used to guide the handheld magnetic field gradient probe tool to perform scanning measurements. Material selection: use non-magnetic materials to make the probe tool, such as red copper, aluminum alloy, titanium alloy, etc. The relative magnetic permeability of these materials is less than 1.001, which can reduce external interference. Platform level adjustment: the platform needs to be equipped with a two-dimensional level meter, and the platform needs to be adjusted to a horizontal state during testing.

[0062] Step 102: Collecting magnetic field data based on the two-dimensional grid through the magnetic flux gate probe.

[0063] In one possible implementation, collecting magnetic field data based on the two-dimensional grid through the magnetic flux gate probe includes: collecting first cell magnetic field data of the device to be tested through the magnetic flux gate probe in a first order on the odd rows of the two-dimensional grid; collecting second cell magnetic field data of the device to be tested through the magnetic flux gate probe in a second order on the even rows of the two-dimensional grid; and determining the magnetic field data based on the first cell magnetic field data and the second cell magnetic field data.

[0064] In actual application, the auxiliary test tool is placed directly above the electronic device to be tested, and the data collector and signal processing device are started. The handheld magnetic field gradient probe tool moves above the magnetic field generated by the device to be tested along a zigzag route, starts to synchronously collect magnetic field data, and transmits the data to the data collector.

[0065] Specifically, when performing scanning measurements, the handheld magnetic field gradient probe tool needs to be tightly attached to the tool platform and move above the magnetic field generated by the device to be tested along a zigzag route to ensure comprehensive coverage of the testing area and accurate acquisition of magnetic field data.

[0066] Step 103: Determining magnetic field gradient data based on the magnetic field data, and determining current density distribution based on the magnetic field gradient data.

[0067] In actual application, the data collector performs preliminary processing on the received data, such as denoising and filtering. Then, the processed data is sent to the signal processing device for in-depth analysis. The signal processing device processes the data according to the preset algorithm, extracts the current distribution information, and calculates the position of the current magnetic source.

[0068] In one possible implementation, determining the current density distribution based on the magnetic field gradient data includes: discretizing the continuous space into a plurality of small cubic units; determining the current density distribution of the small cubic units based on the magnetic field gradient data; and determining the current density distribution based on the current density distribution of the plurality of small cubic units.

[0069] In practical applications, the magnetic field data measured by the probe is subjected to spatial difference operation to obtain the magnetic field gradient tensor G. The relationship between the current density and the magnetic field gradient is established by using the Biot-Savart law. The continuous space is discretized into a plurality of small cubic units, and the current density is solved in each unit. The current density values of all units are combined to obtain the current density distribution J(r) in the entire region to be measured.

[0070] In one possible implementation, determining the current density distribution of the small cubic unit based on the magnetic field gradient data includes: determining a current density linear equation set of each small cubic unit based on the magnetic field gradient data; and solving the current density linear equation set by a numerical method to determine the current density distribution of the small cubic unit.

[0071] In practical applications, referring to Figure 2 , it is assumed that the magnetic field data synchronously collected by two fluxgate probes are B1(B1x, B1y, B1z) and B2(B2x, B2y, B2z) respectively.

[0072] Bg=B1-B2;

[0073] Bgx=B1x-B2x;

[0074] Bgy=B1y-B2y;

[0075] Bgz=B1z-B2z;

[0076] According to the magnetic field data Bg collected by the probe, the magnetic field gradient tensor G is calculated.

[0077]

[0078] Specifically, the gradient tensor G is calculated based on the cross-shaped measurement point data Bg, that is, the four measurement point data Bg(m-1, n), Bg(m+1, n), Bg(m, n-1), and Bg(m, n+1) are used to calculate G(m, n).

[0079] The relationship between the current density J and the magnetic field gradient G is established by using the Biot-Savart law.

[0080] By solving the above equation set, the current density distribution J(r) is obtained. In order to simplify the calculation process, the finite element analysis method can be used to discretize the continuous space into a plurality of small units, and then the current density is solved in each unit. The specific steps are as follows:

[0081] The to-be-tested region is divided into N small cubic units, each unit has a side length of Δx, Δy, and Δz. Assuming that the current density J in each unit is constant, the magnetic field contribution in the unit can be calculated by integration. According to the magnetic field gradient data measured by the probe, a linear equation set about the current density in each unit is established. The equation set is solved by using a numerical method (such as Gaussian elimination method, conjugate gradient method, etc.), and the current density value in each unit is obtained. The current density values of all units are combined to obtain the current density distribution J(r) in the entire to-be-tested region.

[0082] Step 104: determining the current magnetic source position information based on the current density distribution.

[0083] In a possible implementation, the determining of the current magnetic source position information based on the current density distribution includes: determining display information based on the current density distribution; and determining the current magnetic source position information based on the display information.

[0084] In actual applications, according to the calculated current density distribution, a current distribution diagram inside the electronic device is drawn. In order to more intuitively display the results, a pseudo-color diagram or an isogram can be used to represent the size and distribution of the current density.

[0085] Further, the calculated current magnetic source position information can also be output in the form of a chart or text for reference and use of a user to identify error data.

[0086] The embodiment of the present specification provides a current magnetic source inversion positioning method and device based on single-direction magnetic field gradient, wherein the current magnetic source inversion positioning method based on single-direction magnetic field gradient includes: determining a fluxgate probe, determining an auxiliary test tool based on the fluxgate probe; wherein the auxiliary test tool includes a two-dimensional grid; collecting magnetic field data by the fluxgate probe based on the two-dimensional grid; determining magnetic field gradient data based on the magnetic field data, and determining a current density distribution based on the magnetic field gradient data; and determining current magnetic source position information based on the current density distribution. By collecting magnetic field data by the fluxgate probe based on the two-dimensional grid; determining magnetic field gradient data based on the magnetic field data, and determining a current density distribution based on the magnetic field gradient data; and determining current magnetic source position information based on the current density distribution, the diagnosis of the internal current state of the device and the judgment of abnormal current values can be realized.

[0087] Corresponding to the method embodiment described above, the present specification also provides a current magnetic source inversion positioning device based on single-direction magnetic field gradient, Figure 3 A structure schematic diagram of a current magnetic source inversion positioning device based on single-direction magnetic field gradient provided by one embodiment of the present specification is shown. As shown in the figure, Figure 3 The device includes:

[0088] The tooling determination module 301 is configured to determine a fluxgate probe and determine an auxiliary test tooling based on the fluxgate probe; wherein the auxiliary test tooling includes a two-dimensional grid;

[0089] The data acquisition module 302 is configured to collect magnetic field data through a fluxgate probe based on a two-dimensional grid;

[0090] a current density module 303 configured to determine magnetic field gradient data based on the magnetic field data, and to determine a current density distribution based on the magnetic field gradient data;

[0091] The position information module 304 is configured to determine the current magnetic source position information based on the current density distribution.

[0092] In a possible implementation, determining a fluxgate probe includes:

[0093] Determine the probe type, sensitivity information, and sampling rate information;

[0094] Two fluxgate probes are determined based on probe type, sensitivity information, and sampling rate information; and a distance between the two fluxgate probes is adjustable.

[0095] In one possible implementation, the auxiliary test fixture includes a platform structure and a two-dimensional grid;

[0096] The platform structure includes pillars;

[0097] The platform is set up above the device to be tested, and the platform height is adjustable;

[0098] A two-dimensional grid is set on the platform.

[0099] In one possible implementation, magnetic field data is collected using a fluxgate probe based on a two-dimensional grid, including:

[0100] In the odd-numbered rows of the two-dimensional grid, magnetic field data of the first cell is collected from the device under test in the first order through a fluxgate probe;

[0101] In the even-numbered rows of the two-dimensional grid, magnetic field data of the second cell is collected from the device under test through the fluxgate probe in the second order;

[0102] Magnetic field data is determined based on the first cell magnetic field data and the second cell magnetic field data.

[0103] In one possible implementation, determining the current density distribution based on magnetic field gradient data includes:

[0104] Discretize the continuous space into multiple small cubic units;

[0105] Determine the current density distribution of the small cubic unit based on the magnetic field gradient data;

[0106] determining the current density distribution based on the plurality of small cube units.

[0107] In a possible implementation, determining the current density distribution of the small cube units based on the magnetic field gradient data comprises:

[0108] determining the current density linear equation set of each small cube unit based on the magnetic field gradient data;

[0109] determining the current density distribution of the small cube units by solving the current density linear equation set through a numerical method.

[0110] In a possible implementation, determining the current magnetic source position information based on the current density distribution comprises:

[0111] determining the display information based on the current density distribution;

[0112] determining the current magnetic source position information based on the display information.

[0113] The current magnetic source inversion positioning method and device based on the single-direction magnetic field gradient provided by the embodiments of the present specification, wherein the current magnetic source inversion positioning device based on the single-direction magnetic field gradient comprises: a determination magnetic flux gate probe, an auxiliary test tool is determined based on the magnetic flux gate probe; wherein the auxiliary test tool comprises a two-dimensional grid; magnetic field data is collected by the magnetic flux gate probe based on the two-dimensional grid; magnetic field gradient data is determined based on the magnetic field data, and current density distribution is determined based on the magnetic field gradient data; current magnetic source position information is determined based on the current density distribution. By collecting the magnetic field data by the magnetic flux gate probe based on the two-dimensional grid; determining the magnetic field gradient data based on the magnetic field data, and determining the current density distribution based on the magnetic field gradient data; determining the current magnetic source position information based on the current density distribution, the diagnosis of the internal current state of the equipment and the judgment of the abnormal current value can be realized.

[0114] The above is a schematic scheme of the current magnetic source inversion positioning device based on the single-direction magnetic field gradient of the present embodiment. It should be noted that the technical scheme of the current magnetic source inversion positioning device based on the single-direction magnetic field gradient belongs to the same concept as the technical scheme of the current magnetic source inversion positioning method based on the single-direction magnetic field gradient described above, and the details of the technical scheme of the current magnetic source inversion positioning device based on the single-direction magnetic field gradient which are not described in detail can be seen from the description of the technical scheme of the current magnetic source inversion positioning method based on the single-direction magnetic field gradient described above.

[0115] Figure 4 A structural block diagram of a computing device 400 is shown according to an embodiment of the present specification. The components of the computing device 400 include but are not limited to a memory 410 and a processor 420. The processor 420 is connected with the memory 410 through a bus 430, and a database 450 is used to save data.

[0116] The computing device 400 also includes an access device 440 that enables the computing device 400 to communicate via one or more networks 460. Examples of these networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or combinations of these and / or other types of networks such as the Internet. The access device 440 can include one or more of any type of network interface (for example, a network interface card (NIC)), such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a Worldwide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a Universal Serial Bus (USB) interface, a cellular network interface, a Bluetooth interface, Near Field Communication (NFC).

[0117] In one embodiment of the present specification, the above-described components of the computing device 400, as well as other components not shown in FIG. 4, can be connected to each other by a bus. It should be understood that the computing device structure diagram shown is for the purpose of example only and is not a limitation on the scope of the present specification. Other components can be added or replaced as needed by those skilled in the art. Figure 4 In one embodiment of the present specification, the above-described components of the computing device 400, as well as other components not shown in FIG. 4, can be connected to each other by a bus. It should be understood that the computing device structure diagram shown is for the purpose of example only and is not a limitation on the scope of the present specification. Other components can be added or replaced as needed by those skilled in the art. Figure 4 The computing device structure diagram shown is for the purpose of example only and is not a limitation on the scope of the present specification. Other components can be added or replaced as needed by those skilled in the art.

[0118] The computing device 400 can be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (for example, a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, etc.), a mobile phone (for example, a smartphone), a wearable computing device (for example, a smartwatch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or a personal computer (PC). The computing device 400 can also be a mobile or stationary server.

[0119] The processor 420 is configured to execute computer-executable instructions to implement the steps of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient. The above describes a schematic solution of the computing device of the embodiment. It should be noted that the technical solution of the computing device and the technical solution of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient belong to the same concept, and details of the technical solution of the computing device not described in detail can be referred to the description of the technical solution of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient.

[0120] The embodiment of the present specification also provides a computer-readable storage medium storing computer-executable instructions, which are executed by a processor to implement the steps of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient.

[0121] The above describes a schematic solution of the computer-readable storage medium of the embodiment. It should be noted that the technical solution of the storage medium and the technical solution of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient belong to the same concept, and details of the technical solution of the storage medium not described in detail can be referred to the description of the technical solution of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient.

[0122] The embodiment of the present specification also provides a computer program, which, when executed in a computer, causes the computer to perform the steps of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient.

[0123] The above describes a schematic solution of the computer program of the embodiment. It should be noted that the technical solution of the computer program and the technical solution of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient belong to the same concept, and details of the technical solution of the computer program not described in detail can be referred to the description of the technical solution of the method for current magnetic source inversion positioning based on single-direction magnetic field gradient.

[0124] The above describes specific embodiments of the present specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order and still accomplish desirable results. Additionally, the processes depicted in the figures do not necessarily require the particular order shown, or sequential order to achieve desirable results. In certain implementations, multitasking and parallel processing can be advantageous.

[0125] The computer readable medium can include any entity or apparatus capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, software distribution medium, etc. It should be noted that the computer readable medium can include appropriate additions or subtractions according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0126] It should be noted that for the foregoing method embodiments, the descriptions are expressed as a combination of a series of actions for the sake of simplicity, but those skilled in the art should know that the embodiments of the present specification are not limited by the order of the described actions, because according to the embodiments of the present specification, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the embodiments of the present specification.

[0127] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0128] The preferred embodiments of the present specification disclosed above are only used to help explain the present specification. The alternative embodiments do not describe all the details and limit the invention to the specific embodiments described. Obviously, according to the content of the embodiments of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of the present specification, so that those skilled in the art can well understand and use the present specification. The present specification is limited only by the claims and their full scope and equivalents.

Claims

1. A current magnetic source inversion positioning method based on unidirectional magnetic field gradient, characterized in that: include: Determine a fluxgate probe, and determine an auxiliary test fixture based on the fluxgate probe; wherein the auxiliary test fixture includes a two-dimensional grid; collecting magnetic field data through a fluxgate probe based on the two-dimensional grid; determining magnetic field gradient data based on the magnetic field data, and determining a current density distribution based on the magnetic field gradient data; determining the current magnetic source position information based on the current density distribution; The determining of the current density distribution based on the magnetic field gradient data comprises: Discretize the continuous space into multiple small cubic units; determining a current density distribution of the small cubic unit based on the magnetic field gradient data; determining a current density distribution based on the current density distributions of the plurality of small cubic units; The determining of the current density distribution of the small cubic unit based on the magnetic field gradient data comprises: Determine a linear equation group of current density of each of the small cubic units based on the magnetic field gradient data; The current density linear equations are solved by numerical methods to determine the current density distribution of the small cubic unit.

2. The method according to claim 1, characterized in that The determining of the fluxgate probe comprises: Determine the probe type, sensitivity information, and sampling rate information; Two fluxgate probes are determined based on the probe type, the sensitivity information, and the sampling rate information; and a distance between the two fluxgate probes is adjustable.

3. The method according to claim 1, characterized in that The auxiliary test fixture includes a platform structure and a two-dimensional grid; The platform structure includes pillars; The platform is set up above the device to be tested, and the height of the platform is adjustable; The two-dimensional grid is arranged on the platform.

4. The method according to claim 1, wherein The collecting magnetic field data by a fluxgate probe based on the two-dimensional grid includes: Collecting first cell magnetic field data from the device under test in a first order using a fluxgate probe in odd-numbered rows of the two-dimensional grid; In the even-numbered rows of the two-dimensional grid, magnetic field data of a second cell is collected from the device under test using a fluxgate probe in a second order; Magnetic field data is determined based on the first cell magnetic field data and the second cell magnetic field data.

5. The method according to claim 1, wherein The determining of the current magnetic source position information based on the current density distribution includes: determining display information based on the current density distribution; Current and magnetic source position information is determined based on the presentation information.

6. A current magnetic source inversion positioning device based on unidirectional magnetic field gradient, characterized in that: The steps for implementing the current magnetic source inversion positioning method based on a unidirectional magnetic field gradient as described in any one of claims 1 to 5 include: A tool determination module is configured to determine a fluxgate probe and determine an auxiliary test tool based on the fluxgate probe; wherein the auxiliary test tool includes a two-dimensional grid; a data acquisition module configured to acquire magnetic field data through a fluxgate probe based on the two-dimensional grid; a current density module configured to determine magnetic field gradient data based on the magnetic field data, and determine a current density distribution based on the magnetic field gradient data; The position information module is configured to determine the current magnetic source position information based on the current density distribution.

7. A computing device, characterized in that include: memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the current magnetic source inversion positioning method based on unidirectional magnetic field gradient as described in any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the current magnetic source inversion positioning method based on unidirectional magnetic field gradient as described in any one of claims 1 to 5.

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