Magnetic field distribution measuring device and method

Abstract

The present invention discloses a magnetic field distribution measuring device and method, comprising a first conductive seat, a second conductive seat, a first side electrode, a second side electrode, a connecting assembly and a current collecting member, wherein the first conductive seat and the second conductive seat are spaced apart to form a mounting position for a workpiece; the connecting assembly comprises a plurality of conductive members and a plurality of insulating members, the first side electrode comprises a plurality of shunt electrodes, each shunt electrode is spaced apart from the first conductive seat or the current collecting member to form a plurality of adjustment positions, the adjustment positions can install conductive members and insulating members, so that the first conductive seat, the shunt electrode and the current collecting member are electrically conductive or electrically insulated, the device is provided with a sensing assembly, the sensing assembly is used to sense the current signal of the current collecting member and the current signal of each shunt electrode, and the current signal of the current collecting member and the current signal of each shunt electrode are sensed by the sensing assembly, and the magnetic field distribution measurement can be completed without the need for a detection window or a measuring element to invade the interior of the object to be measured, and the device is a non-destructive and low-cost magnetic field distribution measuring device.

Description

Technical Field

[0001] The present invention relates to the field of magnetic field measurement technology, and in particular to a magnetic field distribution measurement device and method. Background Art

[0002] There are many methods for measuring magnetic fields, the most commonly used of which include electromagnetic induction, semiconductor (Hall effect) detection, and nuclear magnetic resonance. The electromagnetic induction method uses a simple coil as the measuring element, directly measuring the magnetic field generated by a Helmholtz coil using the principle of electromagnetic induction.

[0003] Currently, the main means of measuring magnetic field distribution are optical diagnosis and electrical parameter diagnosis. Optical diagnosis requires that the object to be measured has sufficient observation windows, and electrical parameter diagnosis requires that the measuring element invade the interior of the object to be measured to achieve the measurement of the magnetic field distribution. Under extreme conditions, the measuring element is easily damaged, resulting in the invalidation of some experimental data and reduced experimental efficiency. Therefore, the existing technology lacks a non-destructive and low-cost magnetic field distribution measurement device. Summary of the Invention

[0004] The purpose of the present invention is to provide a magnetic field distribution measurement device and method to overcome the problem that the observation window or measuring element needs to invade the interior of the object to be measured to measure the magnetic field distribution. Under extreme conditions, the measuring element is easily damaged, resulting in the invalidation of some experimental data and reduced experimental efficiency.

[0005] The present invention provides a magnetic field distribution measuring device, comprising: a first conductive seat, a second conductive seat, a first side electrode, a second side electrode, a connecting assembly, and a current collecting member, wherein the first conductive seat and the second conductive seat are spaced apart to form a mounting position for mounting a workpiece;

[0006] The connecting assembly includes a plurality of conductive members and a plurality of insulating members. The first side electrode includes a plurality of shunt electrodes, and the plurality of shunt electrodes are spaced apart from each other. Each shunt electrode is respectively disposed between the first conductive seat and the current collecting member. Each shunt electrode is spaced apart from the first conductive seat or the current collecting member to form a plurality of adjustment positions. The second side electrode is connected to the second conductive seat.

[0007] Each of the adjustment positions can be equipped with the conductive member to ensure electrical conduction between the first conductive seat, the shunt electrode, the conductive member, and the current collecting member; each of the adjustment positions can also be equipped with the insulating member to ensure electrical insulation between the shunt electrode and the first conductive seat or the current collecting member;

[0008] The magnetic field distribution measuring device further includes a sensing component, which is used to sense the current signal of the current collecting member and the current signal of each of the shunt electrodes respectively.

[0009] In one embodiment, the shunt electrodes are provided with two, namely a first electrode and a second electrode. One side of the first electrode is connected to the first conductive seat, and a first adjustment position is provided between the other side and the current collecting member. The first adjustment position can be installed with the conductive member or the insulating member.

[0010] One side of the second electrode is connected to the current collecting member, and a second adjustment position is provided between the other side and the first conductive seat, and the second adjustment position can be installed with the conductive member or the insulating member.

[0011] In one embodiment, each of the shunt electrodes is a ring-shaped member, and each of the shunt electrodes is arranged around the workpiece.

[0012] In one embodiment, the connection assembly includes a conductive cylinder, an insulating cylinder, a conductive column and an insulating column. The first adjustment position can be installed with the conductive column or the insulating column, and the second adjustment position can be installed with the conductive cylinder or the insulating cylinder.

[0013] In one embodiment, the sensing component includes a plurality of sensing coils, each of which is respectively provided at the current collecting member and each of the shunt electrodes, and is used to sense the current signal of the current collecting member and the current signal of each of the shunt electrodes.

[0014] In one embodiment, each of the shunt electrodes is provided with a receiving cavity, and each of the sensing coils is disposed in a one-to-one correspondence within the receiving cavity of each of the shunt electrodes.

[0015] In one embodiment, the magnetic field distribution measuring device is further provided with an insulating layer, and the insulating layer is provided between two adjacent shunt electrodes.

[0016] In one embodiment, the shunt electrodes are spaced apart along a straight line.

[0017] In one embodiment, the shunt electrodes are fan-shaped structures, and the shunt electrodes are spaced apart and distributed around the workpiece.

[0018] In a second aspect, the present invention further provides a measurement method, which is applied to the magnetic field distribution measurement device in any of the above embodiments, and specifically comprises the following steps:

[0019] Assemble the workpiece in the installation position;

[0020] The current signal of the current collecting member and the current signal of each of the shunt electrodes are sensed by a sensing component.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The present invention provides a magnetic field distribution measuring device, comprising a first conductive seat, a second conductive seat, a first side electrode, a second side electrode, a connecting assembly and a current collecting member. The first conductive seat and the second conductive seat are spaced apart to form a mounting position for mounting a workpiece. The magnetic field distribution measuring device and measurement method of the present invention are adopted. The sensing assembly senses the current signal of the current collecting member and the current signals of each shunt electrode, so as to infer the spatiotemporal distribution of the magnetic field of the workpiece through each current signal. The magnetic field distribution measurement of the workpiece can be simply realized without damaging the workpiece, and the magnetic field distribution measurement efficiency is high.

[0023] The original single-electrode return structure is transformed into a layered multi-channel return structure through multiple shunt electrodes. The layered multi-channel shunt structure does not affect the original load discharge characteristics, but only changes the return mode of the distributed current at different spatial positions.

[0024] The shunt electrode ring is arranged on the workpiece, and the shunt electrode is in a ring-in-ring structure. The workpiece can be a cylindrical plasma, which is convenient for diagnosing the magnetic field distribution of the cylindrical plasma. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of a magnetic field distribution measuring device in an embodiment of the present invention.

[0026] Figure 2 for Figure 1 A top view of the magnetic field distribution measuring device shown.

[0027] Figure 3 for Figure 2 Middle AA section view.

[0028] Figure 4 for Figure 1 A cross-sectional view of the shunt electrode portion of the device for measuring magnetic field distribution is shown.

[0029] Figure 5 for Figure 1 Schematic diagram of the shape of the shunt electrode in the embodiment.

[0030] Figure 6 Schematic diagram of the shape of the shunt electrode in an embodiment of the present invention.

[0031] Figure 7 Schematic diagram of the shape of the shunt electrode in an embodiment of the present invention.

[0032] In the figure: 10, first conductive seat; 20, second conductive seat; 30, mounting position; 100, first side electrode; 110, shunt electrode; 111, first electrode; 112, second electrode; 111A, second accommodating cavity; 112A, third accommodating cavity; 200, second side electrode; 300, support column; 400, current collecting part; 410, return ring; 420, return tube; 430, first accommodating cavity; 500, adjustment position; 510, first adjustment position; 520, second adjustment position; 600, coil pressing sheet; 610, first pressing sheet; 620, second pressing sheet; 630, third pressing sheet; 700, insulating layer. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] A magnetic field distribution measuring device senses the current signal of a current collecting part and the current signal of each shunt electrode through a sensing component, so that the magnetic field distribution measurement of the part to be measured can be completed without the need for a detection window or the intrusion of a measuring element into the part to be measured.

[0036] See also Figures 1 to 4 The magnetic field distribution measuring device includes a first conductive seat 10, a second conductive seat 20, a first side electrode 100, a second side electrode 200, a connecting assembly and a current collecting member 400. The first conductive seat 10 and the second conductive seat 20 are arranged at intervals to form a mounting position 30 for mounting a workpiece. The workpiece can be assembled in the mounting position 30 to perform magnetic field distribution detection on the workpiece.

[0037] In this embodiment, the connecting assembly includes multiple conductive parts and multiple insulating parts. The first side electrode 100 includes multiple shunt electrodes 110. The multiple shunt electrodes 110 are arranged at intervals from each other. Each shunt electrode 110 is respectively arranged between the first conductive seat 10 and the current collecting member 400. Each shunt electrode 110 is respectively spaced apart from the first conductive seat 10 or the current collecting member 400 to form multiple adjustment positions 500. The second side electrode 200 is connected to the second conductive seat 20.

[0038] Each adjustment position 500 can be installed with the conductive member so that the first conductive seat 10, the shunt electrode 110, the conductive member and the current collecting member 400 are electrically conductive; each adjustment position 500 can also be installed with an insulating member to electrically insulate the shunt electrode 110 from the first conductive seat 10 or the current collecting member 400. By installing an insulating member or a conductive member at each adjustment position 500, the electrical conductivity of the current channel where each shunt electrode 110 is located can be controlled.

[0039] The magnetic field distribution measuring device also includes a sensing component, which is used to sense the current signal of the current collecting part 400 and the current signal of each shunt electrode 110, so as to infer the spatiotemporal distribution of the magnetic field of the workpiece through each current signal. The magnetic field distribution measurement of the workpiece can be simply realized without damaging the workpiece, and the magnetic field distribution measurement efficiency is high.

[0040] In the load return structure of pulse discharge, each shunt electrode 110 shunts the current in the conductive seat, and the sensing component senses the current signal of the collector 400 and the current signal of each shunt electrode 110. By assembling conductive parts or insulating parts at each adjustment position 500 in the circuit, the sensing component produces different sensing results in different assembly schemes, thereby calculating the current of each shunt electrode 110. Based on the calculated current, the magnetic field of the workpiece at each shunt electrode 110 position can be directly inferred.

[0041] The magnetic field distribution measurement device can be used for load experiments of pulse discharge, including air jet Z pinch, wire array Z pinch, sleeve Z pinch, single wire Z pinch, X pinch, capillary discharge, underwater electric explosion, etc.

[0042] In one embodiment, see Figures 1 to 4There are two shunt electrodes 110, namely a first electrode 111 and a second electrode 112. One side of the first electrode 111 is connected to the first conductive seat 10, and a first adjustment position 510 is provided between the other side and the current collecting member 400. The first adjustment position 510 can be installed with a conductive member or an insulating member; one side of the second electrode 112 is connected to the current collecting member 400, and a second adjustment position 520 is provided between the other side and the first conductive seat 10. The second adjustment position 520 can be installed with the conductive member or the insulating member. Through the arrangement of the first electrode 111 and the second electrode 112, the current between the first conductive seat 10 and the current collecting member 400 can be divided into two current channels, which is convenient for calculating the current in the first electrode 111 and the second electrode 112 according to the measurement results of the sensing component.

[0043] Of course, in other embodiments, three or four shunt electrodes 110 may be provided. The number of shunt electrodes 110 provided may be selected according to the setting requirements of the magnetic field distribution measuring device. Within a certain range, the more shunt electrodes 110 are provided, the more accurate the magnetic field distribution result around the workpiece will be.

[0044] In the magnetic field distribution measuring device, the original single-electrode return structure is transformed into a layered multi-channel return structure through multiple shunt electrodes 110. The layered multi-channel shunt structure does not affect the original load discharge characteristics, but only changes the return mode of the distributed current at different spatial positions.

[0045] For further information, see Figures 1 to 5 The shunt electrode 110 is a ring-shaped part. Each shunt electrode 110 is arranged in a ring around the workpiece. The shunt electrode 110 has a ring-in-ring structure. The workpiece can be a cylindrical plasma, which is convenient for diagnosing the magnetic field distribution of the cylindrical plasma.

[0046] Specifically, the connection assembly includes a conductive cylinder, an insulating cylinder, a conductive column and an insulating column. The first adjustment position 510 can be installed with a conductive column or an insulating column, and the second adjustment position 520 can be installed with a conductive cylinder or an insulating cylinder. By arranging and combining the assembly methods of the conductive parts and the insulating parts installed in the adjustment position 500, four different working modes can be obtained. The first working mode is the first adjustment position 510 insulation + the second adjustment position 520 insulation, the second working mode is the first adjustment position 510 short circuit + the second adjustment position 520 insulation, the third working mode is the first adjustment position 510 insulation + the second adjustment position 520 short circuit, and the fourth working mode is the first adjustment position 510 insulation + the second adjustment position 520 short circuit. The first adjustment position 510 is short-circuited + the second adjustment position 520 is short-circuited, wherein the insulation of the first adjustment position 510 means that the first adjustment position 510 is installed with an insulating component, and the short circuit of the first adjustment position 510 means that the first adjustment position 510 is installed with a conductive component. Similarly, the insulation of the second adjustment position 520 means that the second adjustment position 520 is installed with an insulating component, and the short circuit of the second adjustment position 520 means that the second adjustment position 520 is installed with a conductive component. The signal processing measured by the sensing component in these four working modes is different. The current loops in different working modes are different, the shunt coefficients are different, and the results of calculating the shunt components are different.

[0047] Therefore, by adjusting the assembly method of the connection assembly, the signal of the channel of interest can be amplified. The cylindrical or cylindrical structure of the conductive cylinder, insulating cylinder, conductive column, and insulating column closely matches the circular ring structure of the shunt electrode 110, facilitating installation. Preferably, the conductive cylinder, insulating cylinder, conductive column, and insulating column are all provided with external threads, and each shunt electrode 110 is also provided with a matching internal thread, making assembly even easier.

[0048] In one embodiment, the current collecting member 400 includes a return ring 410 and a return tube 420 . The return ring 410 is arranged at the upper end of the return tube 420 . The current in each shunt electrode 110 converges into the return ring 410 , and the sensing component measures the current signal converged in the return ring 410 .

[0049] The magnetic field measuring device is further provided with a support column 300 , one end of which is conductively connected to the second electrode 112 , and the other end of which is conductively connected to the return ring 410 , and can be used to support the second electrode 112 and the return ring 410 .

[0050] Preferably, three support columns 300 are provided, and the support columns 300 are arranged at intervals in the circumferential direction of the reflow ring 410. This arrangement of the support columns 300 allows the other support columns 300 to continue working when a problem occurs during the conduction process of one of the support columns 300, and also allows the installation between the second electrode 112 and the reflow ring 410 to be more stable.

[0051] Preferably, the support column 300 is provided with an external thread, and the second electrode 112 and the reflux ring 410 are provided with an internal thread that matches the external thread in the support column 300. The second electrode 112 and the reflux ring 410 are connected to the support column 300 through threads, which is convenient and quick to assemble.

[0052] In one embodiment, see Figures 1 to 4 The sensing assembly includes a plurality of sensing coils, each of which is provided on the current collecting member 400 and each of the shunt electrodes 110, for sensing the current signal of the current collecting member 400 and the current signal of each of the shunt electrodes 110. Specifically, the sensing coils may be Rogowski coils.

[0053] Preferably, when the shunt electrode 110 is a ring-shaped part, a first accommodating cavity 430 is provided in the return ring 410 in the current collecting part 400. The first accommodating cavity 430 is an annular concave cavity. A sensing coil in the sensing component is provided in the first accommodating cavity 430. The sensing coil measures the current signal in the return ring 410 more accurately.

[0054] Preferably, each shunt electrode 110 is provided with a receiving cavity, and each sensing coil is disposed in the receiving cavity of each shunt electrode 110 in a one-to-one correspondence, so as to avoid the sensing coil being affected by other elements in the environment during measurement, and the measurement result is more accurate.

[0055] Specifically, there are two shunt electrodes 110, namely a first electrode 111 and a second electrode 112, and when the shunt electrode 110 is a ring-shaped part, a second accommodating cavity 111A and a third accommodating cavity 112A are provided in the first electrode 111 and the second electrode 112, and the second accommodating cavity 111A and the third accommodating cavity 112A are annular concave cavities.

[0056] The first accommodating chamber 430, the second accommodating chamber 111A, and the third accommodating chamber 112A are all concave cavities with an opening on one side, and a coil pressing sheet 600 is provided at the opening. A first pressing sheet 610 is provided at the opening of the first accommodating chamber 430, a second pressing sheet 620 is provided at the opening of the second accommodating chamber 111A, and a third pressing sheet 630 is provided at the opening of the third accommodating chamber 112A. After each sensing coil is assembled in the accommodating chamber, each coil pressing sheet 600 confines each sensing coil within each accommodating chamber.

[0057] In one embodiment, see Figures 1 to 4 The magnetic field distribution measuring device is further provided with an insulating layer 700 , which is provided between two adjacent shunt electrodes 110 to avoid mutual interference between the shunt electrodes 110 during measurement by the sensing coil.

[0058] In another embodiment, see Figure 6 The shunt electrodes 110 are spaced apart along a straight line and are a discrete single-point shunt structure, which can be used for diagnosing the magnetic field distribution of a planar wire array Z-pinch plasma.

[0059] In another embodiment, see Figure 7 The shunt electrodes 110 are fan-shaped structures. The shunt electrodes 110 are spaced apart around the workpiece in the circumferential direction. This is a fan-shaped shunt structure that can be used for diagnosing the magnetic field distribution of a non-angularly symmetric Z-pinch.

[0060] See also Figures 1 to 4 The magnetic field distribution measuring method of the magnetic field distribution measuring device according to any of the above embodiments specifically comprises the following steps:

[0061] S100, assembling the workpiece at the installation position 30;

[0062] S200 , sensing the current signal of the current collecting member 400 and the current signal of each of the shunt electrodes 110 through a sensing component.

[0063] The measurement method of this embodiment is mainly used to measure the magnetic field distribution around plasma. The sensing component senses the current signal of the current collector and the current signal of each shunt electrode 110, so as to infer the spatiotemporal distribution of the magnetic field of the workpiece through each current signal. The magnetic field distribution measurement of the workpiece can be simply realized without damaging the workpiece, and the magnetic field distribution measurement efficiency is high.

[0064] This measurement method, for the first time, proposes a mechanically modified reflux structure to achieve current shunting in a discharge plasma. Sensing coils are used to measure the current at each shunt electrode 110, thereby enabling non-invasive magnetic field measurement within the plasma. This method has a wide range of applications. Regardless of whether the plasma being measured is in a vacuum or in an atmosphere, specific shunt structures can be designed for different types of pulsed discharge objects, based on the magnetic fields at different spatial locations of interest, thereby enabling spatially resolved magnetic field measurements. This simple and convenient measurement method is not only applicable to pulsed discharge plasmas, but can also be extended to scientific research in other laboratories.

[0065] Specific principles:

[0066] The signal processing method is as follows: the total current of the current collector 400 is I, the current of the second electrode 112 is I1, the current of the first electrode 111 is I2, the induced potential of the sensing coil set in the second electrode 112 is u1, the induced potential of the sensing coil set in the first electrode 111 is u2, and the induced potential of the sensing coil located in the current collector 400 is u3. Since the sensing coil in the current collector 400 is far away from the workpiece and has a simple structure, the measured signal is only related to the total current I, then u3 = L0dI / dt, where L0 is the self-inductance coefficient of the coil to the total current. When I1 and I are both shielded by the shunt structure, the induced potential of the sensing coil in the first electrode 111 is only related to I2, so u2 = L2dI2 / dt, and the induced potential of the sensing coil in the second electrode 112 is related to I, I1, and I2, so u1 = L1dI1 / dt-L 12 dI2 / dt-L 10 dI / dt.

[0067] In summary, the relationship between the induced potential in each sensing coil and the current in each shunt electrode 110 is:

[0068]

[0069] According to the above formula, three different calibration experiments are conducted. First, the entire current is allowed to flow through the current channel of the first electrode 111, that is, I1 = 0, I2 = I. At this time, L0 and L2 can be directly calibrated. Then the entire current is allowed to flow through the current channel of the second electrode 112, that is, I2 = 0, I1 = I. Finally, half of the current is allowed to flow through the first electrode 111 and the second electrode 112, that is, I I =I / 2, I2=I / 2. According to the three-engine calibration experiment, solve L I 、L 12 、L 10 After the calibration is completed, a wire discharge experiment is performed. By inversely solving the above equation, the current of each shunt channel can be solved based on the induced potential of the coil.

[0070] Taking the workpiece to be tested as a columnar plasma as an example, I 1 To obtain the current component in the space within the second electrode 112 according to the above calibration experiment, μ0 is the magnetic permeability, B(r) is the magnetic field in the space within the second electrode 112, according to the formula: B(r)=(μ0 / 2пr)I 1 , substitute I 1 The magnetic field B(r) in the space within the second electrode 112 can be calculated. Similarly, by substituting the current component in the space within the first electrode 111 obtained from the above calibration experiment, the magnetic field in the space within the first electrode 111 can be calculated.

[0071] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A magnetic field distribution measuring device, characterized in that: The device comprises a first conductive seat (10), a second conductive seat (20), a first side electrode (100), a second side electrode (200), a connecting assembly and a current collecting member (400), wherein the first conductive seat (10) and the second conductive seat (20) are spaced apart to form a mounting position (30) for mounting a workpiece; The connection assembly comprises a plurality of conductive members and a plurality of insulating members, the first side electrode (100) comprises a plurality of shunt electrodes (110), the plurality of shunt electrodes (110) are spaced apart from each other, each shunt electrode (110) is respectively disposed between the first conductive seat (10) and the current collecting member (400), each shunt electrode (110) is spaced apart from the first conductive seat (10) or the current collecting member (400) to form a plurality of adjustment positions (500), and the second side electrode (200) is connected to the second conductive seat (20); Each adjustment position (500) can be installed with the conductive member, so that the first conductive seat (10), the shunt electrode (110), the conductive member and the current collecting member (400) are electrically conductive; each adjustment position (500) is also used to install the insulating member, so that the shunt electrode (110) is electrically insulated from the first conductive seat (10) or the current collecting member (400); The magnetic field distribution measuring device further comprises a sensing component, which is used to respectively sense the current signal of the current collecting member (400) and the current signal of each shunt electrode.

2. The magnetic field distribution measuring device according to claim 1, characterized in that: The shunt electrodes (110) are provided with two, namely a first electrode (111) and a second electrode (112); one side of the first electrode (111) is connected to the first conductive seat (10); and a first adjustment position (510) is provided between the other side of the first electrode (111) and the current collecting member (400); One side of the second electrode (112) is connected to the current collecting member (400), and a second adjustment position (520) is provided between the other side of the second electrode (112) and the first conductive seat (10).

3. The magnetic field distribution measuring device according to claim 2, characterized in that: Each of the shunt electrodes (110) is a ring-shaped piece, and each of the shunt electrodes is arranged around the workpiece.

4. The magnetic field distribution measuring device according to claim 3, characterized in that: The connection assembly comprises a conductive cylinder, an insulating cylinder, a conductive column and an insulating column; the first adjustment position (510) is used to install the conductive part or the insulating part; and the second adjustment position (520) is used to install the conductive part or the insulating part.

5. The magnetic field distribution measuring device according to claim 1, characterized in that: The sensing component comprises a plurality of sensing coils, each of the sensing coils being respectively provided on the current collecting member (400) and each of the shunt electrodes (110), and being used to sense the current signal of the current collecting member (400) and the current signal of each of the shunt electrodes (110).

6. The magnetic field distribution measuring device according to claim 5, characterized in that: Each shunt electrode (110) is provided with a receiving cavity, and each sensing coil is provided in a one-to-one correspondence in the receiving cavity of each shunt electrode (110).

7. The magnetic field distribution measuring device according to claim 1, characterized in that: It also includes an insulating layer (700), wherein the insulating layer (700) is arranged between two adjacent shunt electrodes (110).

8. The magnetic field distribution measuring device according to claim 1, characterized in that: The shunt electrodes (110) are arranged at intervals along a straight line direction.

9. The magnetic field distribution measuring device according to claim 1, characterized in that: Each of the shunt electrodes (110) is a fan-shaped structure, and each of the shunt electrodes (110) is distributed at intervals in the circumferential direction of the workpiece.

10. A measurement method, characterized in that: The measurement method is applied to the magnetic field distribution measurement device according to any one of claims 1 to 9, and the measurement method specifically comprises the following steps: Assemble the workpiece in the installation position; The current signal of the current collecting member and the current signal of each of the shunt electrodes are sensed by a sensing component.

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