Magnetic signal measurement system, method and equipment for sheet ferromagnetic materials

Abstract

This application provides a magnetic signal measurement system, method, and apparatus for sheet-like ferromagnetic materials, relating to the field of magnetic property measurement. The system includes a sample under test, a magnetic field strength measuring device, a magnetic induction intensity measuring device, a strain measuring device, an upper fixed plate, a lower fixed plate, and a magnetic signal processing device. The sample under test is placed on the lower fixed plate and magnetized under an orthogonal magnetic field. The magnetic field strength measuring device is fixed to the upper fixed plate by double-ended studs and acquires the magnetic field strength signal. One end of the magnetic induction intensity measuring device is welded to the magnetic field strength measuring device, and the other end contacts the sample to acquire the magnetic induction intensity signal. The strain measuring device is deployed on the surface of the sample and acquires the magnetostrictive strain signal. The magnetic signal processing device connects to each device and processes the three types of signals to obtain magnetic property data. This system, through orthogonal magnetic field excitation, multi-device collaborative acquisition, and integrated signal processing, can achieve simultaneous measurement of the two-dimensional magnetic properties and magnetostrictive effect of sheet-like ferromagnetic materials, improving measurement efficiency.

Description

Technical Field

[0001] This application relates to the field of magnetic property measurement, and in particular to a magnetic signal measurement system, method and device for sheet-like ferromagnetic materials. Background Technology

[0002] Ferromagnetic sheet-like strips (such as silicon steel, amorphous, and nanocrystalline strips) are core magnetic materials for power equipment and electronic components, including power transformers, high-efficiency motors, and high-frequency inductors. During device design and performance optimization, it is necessary to measure multiple physical quantities such as magnetic field strength (H), magnetic flux density (B), and magnetostrictive strain (λ) to achieve accurate modeling of the material's dynamic magnetization behavior and optimized device performance design.

[0003] In related technologies, multiple independent measurement systems are typically used to acquire different physical quantities. For example, an Epstein square or uniaxial magnetic property measuring instrument is used to acquire unidirectional BH data, and then a separate strain measurement system is used to measure the magnetostrictive strain. However, the above measurement method requires repeated loading and unloading of samples between different measurement systems and the establishment of independent test conditions for each system, resulting in low measurement efficiency. Summary of the Invention

[0004] This application provides a magnetic signal measurement system, method, and device for sheet-like ferromagnetic materials, which can realize the synchronous acquisition of multiple physical quantity data to improve measurement efficiency.

[0005] In a first aspect, this application provides a magnetic signal measurement system for sheet-like ferromagnetic materials, comprising: a sample to be tested, a magnetic field strength measuring device, a magnetic induction intensity measuring device, a strain measuring device, an upper fixing plate, a lower fixing plate, and a magnetic signal processing device;

[0006] The sample to be tested is placed on the lower fixed plate for magnetization under the action of an orthogonal magnetic field;

[0007] The magnetic field strength measuring device is fixed above the upper fixing plate by a double-headed stud and is used to collect the magnetic field strength signal of the sample to be tested.

[0008] One end of the magnetic induction intensity measuring device is welded and fixed to the magnetic field intensity measuring device, and the other end is in contact with the sample to be tested, for collecting the magnetic induction intensity signal of the sample to be tested;

[0009] The strain measurement device is deployed on the upper surface of the sample to be tested and is used to collect the magnetostrictive strain signal of the sample to be tested.

[0010] The magnetic signal processing device is connected to the magnetic field strength measuring device, the magnetic induction intensity measuring device, and the strain measuring device, and is used to receive and process the magnetic field strength signal, the magnetic induction intensity signal, and the magnetostrictive strain signal to obtain the magnetic property data of the sample to be tested.

[0011] In one possible implementation, the test sample includes four main arms extending along a cruciform skeleton.

[0012] In one possible implementation, a notch is provided at the angle between adjacent arms of the sample under test. The notch is used to constrain the direction of magnetic flux flow, so that the magnetic flux is concentrated in the central region of the sample under test.

[0013] In one possible implementation, the magnetic field strength measuring device includes: an upper H coil, a lower H coil, an upper collector support plate, and a lower collector support plate;

[0014] The upper H coil is located above the lower H coil and is fixed below the upper collector support plate;

[0015] The lower H coil is fixed above the lower collector support plate;

[0016] The upper collector support plate and the lower collector support plate are connected by the double-ended studs.

[0017] In one possible implementation, the magnetic induction intensity measuring device consists of four spring probes. One end of each spring probe passes through a through hole in the lower collector support plate and is welded and fixed to the lower collector support plate. The other end is provided with a probe that makes elastic contact with the sample to be tested.

[0018] In one possible implementation, the four spring probes include a first spring probe, a second spring probe, a third spring probe, and a fourth spring probe;

[0019] The contact point between the first spring probe and the third spring probe is located on the center line of the first main arm of the cross-shaped frame.

[0020] The contact point between the second spring probe and the fourth spring probe is located on the center line of the second main arm of the cross-shaped frame, and the second main arm is perpendicular to the first main arm.

[0021] In one possible implementation, the strain measuring device includes a triaxial strain rosette and a strain signal interface disposed on the upper fixed plate;

[0022] The triaxial strain gauge is attached to the surface of the test sample and connected to the strain signal interface via a signal line passing through a square hole in the upper fixing plate.

[0023] In one possible implementation, the upper fixing plate and the lower fixing plate are connected by a screw and nut linkage structure.

[0024] In a second aspect, this application provides a method for measuring the magnetic signal of a sheet-like ferromagnetic material, which is applied to a magnetic signal processing device in a magnetic signal measurement system for the sheet-like ferromagnetic material as described in any one of the first aspects, comprising:

[0025] An orthogonal magnetic field is applied to the sample under test to magnetize it.

[0026] The magnetic field strength signal of the sample under test is acquired by the magnetic field strength measuring device.

[0027] The magnetic induction intensity signal of the sample under test is acquired by the magnetic induction intensity measuring device.

[0028] The magnetostrictive strain signal of the sample is acquired by the strain measurement device.

[0029] The magnetic field strength signal, the magnetic induction intensity signal, and the magnetostrictive strain signal are processed to obtain the magnetic property data of the sample under test. The magnetic property data includes the hysteresis loop, magnetic permeability, and magnetostriction coefficient.

[0030] Thirdly, this application provides a magnetic signal processing device, including: a memory and a processor;

[0031] The memory stores computer-executed instructions;

[0032] The processor executes computer execution instructions stored in the memory, causing the processor to perform the method described in the second aspect above.

[0033] Fourthly, this application provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the magnetic signal measurement method for sheet-like ferromagnetic materials as described in the second aspect above.

[0034] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the second aspect above.

[0035] This application provides a magnetic signal measurement system, method, and apparatus for sheet-like ferromagnetic materials. The magnetic signal measurement system for sheet-like ferromagnetic materials includes a sample under test, a magnetic field strength measuring device, a magnetic induction intensity measuring device, a strain measuring device, an upper fixing plate, a lower fixing plate, and a magnetic signal processing device. The sample under test is placed on the lower fixing plate for magnetization in an orthogonal magnetic field. The magnetic field strength measuring device is fixed above the upper fixing plate for acquiring magnetic field strength signals. One end of the magnetic induction intensity measuring device is welded to the magnetic field strength measuring device, and the other end contacts the sample under test for acquiring magnetic induction intensity signals. The strain measuring device is deployed on the upper surface of the sample under test for acquiring magnetostrictive strain signals. The magnetic signal processing device is connected to each measuring device to receive and process the magnetic field strength signal, magnetic induction intensity signal, and magnetostrictive strain signal to obtain the magnetic property data of the sample under test. This system, by adopting an integrated architecture with simultaneous acquisition of multiple physical quantities, can simultaneously acquire two-dimensional magnetic properties and magnetostrictive strain data, greatly improving measurement efficiency and data synchronization, accurately characterizing the anisotropic magnetic behavior and magneto-mechanical coupling mechanism of materials, and providing support for the research and development of ferromagnetic materials and equipment optimization. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0037] Figure 1 A schematic diagram illustrating the application scenarios provided in the embodiments of this application;

[0038] Figure 2 A schematic diagram of the structure of a first embodiment of the magnetic signal measurement system for sheet-like ferromagnetic materials provided in this application;

[0039] Figure 3 This is a schematic diagram of the structure of a sample to be tested provided in an embodiment of this application;

[0040] Figure 4 A schematic diagram of the structure of the magnetic signal measurement system for sheet-like ferromagnetic materials provided in this application, according to Embodiment 2;

[0041] Figure 5 This is a schematic diagram of the structure of a magnetic field strength measuring device provided in an embodiment of this application;

[0042] Figure 6 This application provides a schematic diagram of the structure of an orthogonally wound coil according to an embodiment of the present application.

[0043] Figure 7 This is a schematic diagram of the structure of a spring probe provided in this embodiment;

[0044] Figure 8This application provides a schematic diagram of the measurement direction of a spring probe.

[0045] Figure 9 This is a schematic diagram of the triaxial strain gauge attachment position provided in an embodiment of this application;

[0046] Figure 10 This is a schematic diagram of a triaxial strain grommet wiring structure provided in an embodiment of this application;

[0047] Figure 11 A schematic flowchart illustrating the magnetic signal measurement method for sheet-like ferromagnetic materials provided in this application embodiment;

[0048] Figure 12 This is a schematic diagram of the magnetic signal processing device provided in this application.

[0049] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0050] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0051] Ferromagnetic sheet-like strips (such as silicon steel, amorphous, and nanocrystalline strips) are the core magnetic medium for power equipment and electronic components such as power transformers, high-efficiency motors, and high-frequency inductors. Their magnetic properties, such as coercivity, iron loss, permeability, and magnetostriction coefficient, directly determine the energy conversion efficiency, power density, vibration and noise levels, and service reliability of the devices.

[0052] During rolling and subsequent heat treatment, the grains of these materials develop a highly preferred orientation, resulting in strong anisotropy in their magnetic properties within a two-dimensional plane. Specifically, this manifests as significant differences in magnetization, loss characteristics, and magnetostrictive behavior along the rolling direction (RD) versus perpendicular to the rolling direction (TD). For example, the RD direction typically exhibits lower coercivity and iron loss, as well as higher permeability; while the magnetostrictive behavior also varies considerably depending on the direction and the applied magnetic field.

[0053] To optimize material fabrication processes and improve device design and performance, it is typically necessary to measure two-dimensional magnetic field strength (H), two-dimensional magnetic flux density (B), and magnetostrictive strain (λ). Two-dimensional refers to the RD and TD directions. Two-dimensional magnetic flux density includes magnetic field strength components along the RD and TD directions, reflecting the ease of magnetization of the material in different directions. Magnetostrictive strain includes components along the RD and TD directions, reflecting the material's magnetization capability in different directions. Magnetostrictive strain includes components along the RD and TD directions, and a shear strain component along the angle bisector, reflecting the dimensional changes of the material during magnetization. It is a key parameter for studying magneto-mechanical coupling effects and predicting electromagnetic vibrations and noise.

[0054] In related technologies, multiple independent measurement systems are typically used to acquire different physical quantities. For example, Epstein square ring or uniaxial magnetic property measuring instruments are used to acquire unidirectional BH data, and then a separate strain measurement system is used to measure magnetostrictive strain. However, the above measurement methods require repeated loading and unloading of samples between different measurement systems and the establishment of independent test conditions for each system. The testing process is cumbersome, time-consuming, and inefficient.

[0055] Furthermore, the BH data and strain data obtained by the above measurement methods cannot be precisely correlated in time, which makes it impossible to accurately reveal the real-time coupling relationship between electromagnetic properties and mechanical deformation during dynamic magnetization.

[0056] To address the aforementioned issues, the inventors considered employing an integrated structural design and a collaborative mechanism for simultaneous acquisition of multiple physical quantities, combined with orthogonal magnetization conditions, to achieve efficient, accurate, and synchronous measurement of magnetic signals, thereby improving the integration and data reliability of the measurement system. Based on this, after numerous experiments, the inventors discovered that the sample under test, the magnetic field strength measuring device, the magnetic induction intensity measuring device, and the strain measuring device can be integrated into a single unit via an upper fixing plate, a lower fixing plate, and double-ended studs. The magnetic field strength measuring device acquires magnetic field strength signals, the magnetic induction intensity measuring device acquires magnetic induction intensity signals, and the strain measuring device acquires magnetostrictive strain signals. These signals are then simultaneously received and processed using magnetic signal processing equipment to obtain the magnetic property data of the sample under test, achieving a comprehensive and synchronous characterization of the anisotropic magnetic behavior of sheet-like ferromagnetic materials. Based on this, this application proposes a magnetic signal measurement system for sheet-like ferromagnetic materials to improve the efficiency, accuracy, and synchronization of magnetic signal measurement.

[0057] Figure 1 This is a schematic diagram illustrating an application scenario provided in an embodiment of this application. Please refer to [link / reference]. Figure 1The magnetic signal measurement system 10 for sheet ferromagnetic materials includes a sample sheet 11 to be tested, a magnetic signal measurement device 12, and a magnetic signal processing device 13.

[0058] The test sample 11, as the test object, can be magnetized under the action of orthogonal magnetic fields. The magnetic signal measuring device 12 can collect magnetic signals from the magnetized test sample 11 and send the magnetic signals to the magnetic signal processing device 13. The magnetic signal processing device 13 receives and processes these magnetic signals to generate magnetic characteristic data including hysteresis loop, permeability, magnetostriction coefficient, etc., thereby realizing accurate analysis and characterization of the magnetic properties of the test sample 11. Among them, the magnetic signals can include magnetic signals of multiple physical quantities such as magnetic field strength, magnetic induction intensity, and strain.

[0059] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0060] Figure 2 This is a schematic diagram of the structure of an embodiment of the magnetic signal measurement system for sheet-like ferromagnetic materials provided in this application. Please refer to [link / reference]. Figure 2 The magnetic signal measurement system 20 for sheet ferromagnetic materials includes a sample sheet 21 to be tested, a magnetic field strength measuring device 22, a magnetic induction intensity measuring device 23, a strain measuring device 24, an upper fixing plate 25, a lower fixing plate 26, and a magnetic signal processing device 27.

[0061] The sample 21 to be tested is placed on the lower fixed plate 26 for magnetization under the action of an orthogonal magnetic field;

[0062] Optionally, the test sample 21 includes four main arms extending along the cross-shaped skeleton, which can be cross-shaped, eight-armed, or twelve-armed.

[0063] Optionally, a notch is provided at the angle between adjacent arms of the sample 21 to constrain the magnetic flux flow direction and concentrate the magnetic flux in the central region of the sample.

[0064] Figure 3 This is a schematic diagram of the structure of a test sample provided in an embodiment of this application. Please refer to... Figure 3The test sample 21 includes four main arms extending along a cross-shaped frame: a first main arm 211, a second main arm 212, a third main arm 213, and a fourth main arm 214. Additionally, the test sample also has a first secondary arm 215, a second secondary arm 216, a third secondary arm 217, and a fourth secondary arm 218. Notches 219 are provided at the angles between adjacent arms of the test sample. The width of the notches can be selected as needed within the range of 1-5 mm, and the length can be selected as needed within the range of 10-20 mm to accommodate different magnetic flux constraint strengths and ranges of action. For example, a total of eight notches of the same size can be opened at the angles of an eight-arm-shaped test sample to constrain the magnetic flux flow, concentrating the magnetic flux in the central region of the eight-arm-shaped test sample.

[0065] The magnetic field strength measuring device 22 is fixed above the upper fixing plate 25 by a double-headed stud 28, and is used to collect the magnetic field strength signal of the sample 21 to be tested;

[0066] The magnetic field strength signal includes a magnetic field strength component along the direction of the first main arm of the cross-shaped skeleton of the sample under test. Magnetic field strength components along the direction of the second main arm The magnetic field intensity components in the two directions are orthogonal to each other and together constitute the two-dimensional magnetic field intensity signal of the sample under test, which can completely characterize the magnetization excitation state of the sample under test under the action of orthogonal magnetic fields.

[0067] One end of the magnetic induction intensity measuring device 23 is welded and fixed to the magnetic field intensity measuring device 22, and the other end is in contact with the sample 21 to be tested, which is used to collect the magnetic induction intensity signal of the sample 21 to be tested;

[0068] The magnetic flux density signal includes a magnetic flux density component along the direction of the first main arm of the cross-shaped skeleton of the sample under test. Magnetic induction intensity component along the direction of the second main arm The magnetic induction intensity components in the two directions are orthogonal to each other and together constitute the two-dimensional magnetic induction intensity signal of the sample under test, which can completely characterize the magnetization response state of the sample under test under the action of orthogonal magnetic fields.

[0069] The strain measurement device 24 is deployed on the upper surface of the sample 21 to be tested, and is used to collect the magnetostrictive strain signal of the sample 21.

[0070] The magnetostrictive strain signal includes magnetostrictive strain components along the direction of the first main arm of the cross-shaped skeleton of the sample under test. Magnetostrictive strain components along the direction of the second main arm and the shear strain components along the bisectors of the two principal arm angles. It is used to fully characterize the magneto-mechanical coupling deformation state of the sample under test under the action of orthogonal magnetic fields.

[0071] The magnetic signal processing device 27 is connected to the magnetic field strength measuring device 22, the magnetic induction intensity measuring device 23, and the strain measuring device 24. It is used to receive and process the magnetic field strength signal, the magnetic induction intensity signal, and the magnetostrictive strain signal to obtain the magnetic property data of the sample 21 under test. The magnetic property data may include the hysteresis loop, permeability, and magnetostriction coefficient.

[0072] Optionally, the magnetic signal processing device 27 can be connected to the signal output interface of the magnetic field strength measuring device 22 via a shielded coaxial cable, to the signal output terminal of the magnetic induction intensity measuring device 23 via a low-noise differential signal line, and to the strain signal interface of the strain measuring device 24 via a strain-specific shielded cable.

[0073] Specifically, the hysteresis loop is used to describe the nonlinear relationship between magnetic field strength H and magnetic flux density B.

[0074] For example, data collected at the same time point and Perform a one-to-one correspondence, and include all time points. By plotting the data points in a coordinate system and connecting them to form a closed curve, a one-dimensional hysteresis loop along the direction of the first main arm of the sample under test (such as the RD direction) can be obtained; similarly, from A one-dimensional hysteresis loop in the direction of the second main arm (such as the TD direction) can be obtained. If the excitation is a synchronous orthogonal alternating magnetic field, the vector can also be... and Through joint analysis, a two-dimensional hysteresis trajectory is constructed to characterize the in-plane vector magnetization behavior of the material.

[0075] Specifically, permeability reflects a material's ability to be magnetized in different directions; it is the ratio of magnetic induction intensity to magnetic field strength.

[0076] For example, under low-frequency sinusoidal excitation, the frequency of each cycle can be controlled. and By performing differentiation or amplitude ratio calculations, the permeability in the direction of the first main arm can be obtained. Similarly, from and The permeability in the direction of the second main arm can be obtained. Among them, magnetic permeability With permeability The calculation formula is:

[0077] Formula (1)

[0078] Specifically, the magnetostriction coefficient is used to reflect the dimensional changes of a material during the magnetization process and is a direct manifestation of the magneto-mechanical coupling effect.

[0079] For example, the magnetostrictive strain components along the first main arm direction collected at the same time point can be directly extracted. Magnetostrictive strain components along the direction of the second main arm and the shear strain components along the bisectors of the two principal arm angles. Combined with the pre-measured saturation magnetization of the material The magnetostriction coefficient in the direction of the first main arm was calculated. Magnetostriction coefficient in the direction of the second main arm and shear magnetostriction coefficient Furthermore, this can be combined with synchronously acquired magnetic field strength components. , It can also draw , The curve fully characterizes the dynamic variation of the magnetostriction coefficient with the magnetic field. Specifically, the magnetostriction coefficients of the first and second main arms... , and shear magnetostriction coefficient The calculation formula is:

[0080] Formula (2)

[0081] The magnetic signal measurement system for sheet-like ferromagnetic materials provided in this application includes a sample under test, a magnetic field strength measuring device, a magnetic induction intensity measuring device, a strain measuring device, an upper fixing plate, a lower fixing plate, and a magnetic signal processing device. The sample under test is used to achieve directional magnetization under orthogonal magnetic fields. The magnetic field strength measuring device, the magnetic induction intensity measuring device, and the strain measuring device are integrated into one unit via the upper and lower fixing plates and double-ended studs, used to simultaneously acquire two-dimensional magnetic field strength, two-dimensional magnetic induction intensity, and magnetostrictive strain signals. The magnetic signal processing device is connected to each measuring device to process the simultaneously acquired multi-physical quantity signals, generating magnetic property data such as hysteresis loop, permeability, and magnetostriction coefficient. In the above process, the system, through its integrated design and core architecture of simultaneous acquisition of multiple physical quantities, achieves simultaneous measurement of the two-dimensional magnetic properties and magnetostrictive effect of sheet-like ferromagnetic materials, effectively improving the efficiency of magnetic signal measurement.

[0082] Figure 4 This is a schematic diagram of the structure of a second embodiment of the magnetic signal measurement system for sheet-like ferromagnetic materials provided in this application. Please refer to [link / reference]. Figure 4 ,exist Figure 2 Based on the embodiment shown, the magnetic signal measurement system 20 for the sheet-like ferromagnetic material also includes a screw and nut linkage structure 29 for connecting the upper fixing plate 25 and the lower fixing plate 26.

[0083] In one specific embodiment, the magnetic field strength measuring device 22 includes: an upper H coil 221, a lower H coil 222, an upper collector support plate 223, and a lower collector support plate 224.

[0084] Figure 5 This is a schematic diagram of a magnetic field strength measuring device provided in an embodiment of this application. Please refer to... Figure 5 The magnetic field strength measuring device uses a double H coil, which is arranged in an upper and lower structure, including an upper H coil 221 and a lower H coil 222.

[0085] The upper H coil 221 is located above the lower H coil 222 and is fixed below the upper collector support plate 223;

[0086] The lower H coil 222 is fixed above the lower data collector support plate 224;

[0087] The upper collector support plate 223 and the lower collector support plate 224 are connected by double-ended studs 28.

[0088] Each coil is formed by two enameled wires orthogonally and uniformly wound on a rectangular mold. The number of turns n can be estimated according to formula (3):

[0089] Formula (3)

[0090] in, This is the minimum voltage value that magnetic signal processing equipment can measure; The operating frequency of the excitation magnetic field; denoted as vacuum magnetic permeability; D is the effective width of the rectangular mold, h is the thickness of the rectangular mold, and d is the diameter of the enameled wire.

[0091] Figure 6 This is a schematic diagram of an orthogonally wound coil provided as an embodiment of this application. Please refer to... Figure 6 The orthogonally wound coil is formed by orthogonally and uniformly winding two enameled wires on the same rectangular mold: one set of coils is wound along the effective width D of the mold, with a total of n turns; the other set of coils is orthogonally wound along the perpendicular direction of the mold, also with n turns. The two sets of coils are orthogonally distributed on the surface of the mold, forming a two-dimensional orthogonal detection structure, which can simultaneously acquire magnetic field induction signals in two orthogonal directions, thereby realizing the synchronous measurement of two-dimensional magnetic field strength.

[0092] In one specific implementation, the magnetic induction intensity measuring device consists of four spring probes, such as... Figure 5 As shown, one end of each spring probe passes through a through hole in the lower collector support plate 224 and is welded and fixed to the lower collector support plate 224. The other end is provided with a probe that makes elastic contact with the sample 21 to be tested.

[0093] Figure 7 This is a schematic diagram of a spring probe provided in this embodiment. Please refer to [link / reference]. Figure 7 The spring probe consists of a probe 71, a built-in spring 72, and a sleeve 73. After applying a certain pressure to each spring probe, it can ensure that the probe is in close contact with the sample 21 to be tested, thereby stably acquiring the magnetic induction intensity signal (i.e., magnetic flux density signal) in the sample.

[0094] It should be noted that the number of spring probes can be flexibly adjusted according to the number of arms of the sample under test. For example, for a cross-shaped four-arm sample under test, four spring probes can be configured so that each probe contacts one main arm; for an eight-arm sample under test, eight spring probes can be configured to achieve full-coverage signal acquisition of the multi-arm structure.

[0095] In one alternative implementation, the four spring probes include a first spring probe 231, a second spring probe 232, a third spring probe 233, and a fourth spring probe 234.

[0096] The contact points of the first spring probe 231 and the third spring probe 233 are located on the center line of the first main arm 211 of the cross-shaped frame; the contact points of the second spring probe 232 and the fourth spring probe 234 are located on the center line of the second main arm 212 of the cross-shaped frame, and the second main arm 212 is perpendicular to the first main arm 211.

[0097] Figure 8 This is a schematic diagram illustrating the measurement direction of a spring probe according to an embodiment of this application. Please refer to... Figure 8 The first spring probe 231 and the third spring probe 233 are arranged along the first main arm 211 (X direction), and their contact point is located on the center line of the main arm, used to collect the magnetic induction intensity component along the X direction. The second spring probe 232 and the fourth spring probe 234 are arranged along the second main arm 212 (Y direction), and their contact point is located on the center line of the main arm, used to collect the magnetic induction intensity component along the Y direction. The two sets of probes are orthogonally distributed, which can simultaneously acquire the magnetic induction intensity signals of the sample under test in the two orthogonal directions of X and Y.

[0098] The X and Y directions can be manually set according to the rolling process of the sample to be tested. For example, the X direction can be aligned with the rolling direction (RD direction) of the sample, and the Y direction can be aligned with the direction perpendicular to the rolling (TD direction), thereby directly acquiring the magnetic induction intensity components along the RD and TD directions.

[0099] In one specific embodiment, the strain measuring device 24 includes a triaxial strain rosette 241 and a strain signal interface 242 disposed on the upper fixed plate 25.

[0100] The triaxial strain gauge 241 is attached to the surface of the test specimen 21 and is connected to the strain signal interface 242 by passing through the square hole on the upper fixing plate 25 via the signal line 243.

[0101] Figure 9 This is a schematic diagram showing the attachment position of the triaxial strain gauge according to an embodiment of this application. Please refer to... Figure 9 The triaxial strain rosette 241 is attached to the central region of the sample 21 to be tested. This central region is the overlapping and intersection area of ​​the main arms of the sample 21 to be tested, and it is also the location where the magnetic flux is most concentrated under the action of orthogonal magnetic fields. The magnetostrictive strain component along the X direction can be collected simultaneously. Magnetostrictive strain components along the Y direction and the shear strain components along the angle bisector direction. .

[0102] Figure 10 This is a schematic diagram of a triaxial strain gauge wiring structure provided in an embodiment of this application. Please refer to [link / reference]. Figure 10 A triaxial strain rose 241 is attached to the central region of the sample 21 to be tested. Its signal line 243 extends along the sample surface, passes through a square hole in the center of the upper fixing plate 25, and connects to a strain signal interface 242 located on the edge of the upper fixing plate 25. This wiring method ensures stable transmission of the magnetostrictive strain signal, avoiding pulling or interference on the signal line during device integration, thereby improving the reliability of magnetostrictive strain signal acquisition.

[0103] The magnetic signal measurement system for sheet ferromagnetic materials provided in this application includes a sample under test, a magnetic field strength measuring device, a magnetic induction intensity measuring device, a strain measuring device, an upper fixing plate, a lower fixing plate, a screw and nut linkage structure, and a magnetic signal processing device. The magnetic field strength measuring device employs a double H-coil orthogonal winding structure, enabling simultaneous acquisition of two-dimensional magnetic field strength signals. The magnetic induction intensity measuring device uses a spring probe elastic contact structure, ensuring stable acquisition of two-dimensional magnetic induction intensity signals. The strain measuring device uses a triaxial strain rosette attached to the center of the sample under test, enabling simultaneous acquisition of magnetostrictive strain components. The screw and nut linkage structure enhances the connection stability of the upper and lower fixing plates and improves the overall rigidity of the device. Through the core architecture of double H-coil orthogonal detection, spring probe elastic contact, precise triaxial strain rosette placement, and integrated design, this system achieves efficient, accurate, and synchronous measurement of the two-dimensional magnetic properties and magnetostrictive effect of sheet ferromagnetic materials, significantly improving testing efficiency and providing crucial experimental data for the anisotropic magnetic behavior and magneto-mechanical coupling mechanism of sheet ferromagnetic materials.

[0104] Figure 11 This is a schematic flowchart illustrating the magnetic signal measurement method for sheet-like ferromagnetic materials provided in this application embodiment. Please refer to... Figure 11The method, applied to the magnetic signal processing device in the above system embodiments, may include:

[0105] S1101. Apply an orthogonal magnetic field to the sample to be tested so that the sample is magnetized.

[0106] In this step, the magnetic signal processing equipment can control the external magnetic field generator to apply an orthogonal magnetic field to the sample to be tested placed on the lower fixed plate. The orthogonal magnetic field consists of mutually perpendicular magnetic field components in the X direction (such as the rolling direction RD) and the Y direction (such as perpendicular to the rolling direction TD), which can make the sample to be tested uniformly magnetized in a two-dimensional plane.

[0107] In one specific implementation, the sample to be tested needs to be pre-fixed in the positioning area of ​​the lower fixing plate to ensure that the first main arm and the second main arm of the cross-shaped skeleton of the sample to be tested are precisely aligned with the X and Y directions respectively, so as to ensure that the orthogonal magnetic field can magnetize and excite the sample along the preset direction.

[0108] Optionally, the strength parameters of the orthogonal magnetic field can be adaptively adjusted according to the material properties of the sample under test. For example, for soft magnetic materials such as silicon steel sheets, a magnetic field strength as low as 0.5 Tesla (T) can be applied; for hard magnetic materials such as iron-cobalt alloys, the magnetic field strength can be increased to about 2.0T to ensure that the magnetic domains inside the sample can fully flip and achieve a stable magnetization state.

[0109] In addition, a gradual voltage boosting mode can be adopted during the application of the magnetic field to avoid uneven magnetization of the sample due to sudden changes in the magnetic field. At the same time, the magnetic signal processing equipment can monitor the stability of the magnetic field strength in real time to ensure that the magnetic field components in the X and Y directions remain orthogonal and the amplitude meets the preset requirements, thus providing a reliable magnetization basis for subsequent magnetic signal acquisition.

[0110] S1102. Collect the magnetic field strength signal of the sample under test using a magnetic field strength measuring device.

[0111] In this step, a magnetic field strength measurement device with a dual H-coil architecture can be used to complete signal acquisition and obtain a two-dimensional magnetic field strength signal.

[0112] In practice, when the sample under test is magnetized by an orthogonal magnetic field, the dual H coils can induce a voltage signal that is proportional to the magnetic field strength. The X-direction coil collects the magnetic field strength component in the direction of the first main arm, and the Y-direction coil collects the magnetic field strength component in the direction of the second main arm. The two components are orthogonal to each other and together constitute the two-dimensional magnetic field strength signal of the sample under test.

[0113] Furthermore, the acquired two-dimensional magnetic field strength signal can be transmitted to a magnetic signal processing device via a shielded coaxial cable.

[0114] S1103. Collect the magnetic induction intensity signal of the sample under test through a magnetic induction intensity measuring device.

[0115] In this step, a spring probe can be used to acquire the signal and obtain the two-dimensional magnetic induction intensity signal.

[0116] In practice, when the sample under test is magnetized by an orthogonal magnetic field, the probe of the spring probe is in close elastic contact with the sample under test, and can sense a signal corresponding to the magnetic induction intensity. The X-direction probe group collects the magnetic induction intensity component in the direction of the first main arm, and the Y-direction probe group collects the magnetic induction intensity component in the direction of the second main arm. The two components are orthogonal to each other and together constitute the two-dimensional magnetic induction intensity signal of the sample under test.

[0117] Furthermore, the acquired two-dimensional magnetic induction intensity signal can be transmitted to a magnetic signal processing device via a low-noise differential signal line.

[0118] S1104. The magnetostrictive strain signal of the sample under test is acquired by a strain measurement device.

[0119] In this step, a strain measurement device with a triaxial strain rose architecture can be used to complete signal acquisition and obtain multi-dimensional magnetostrictive strain signals.

[0120] In practice, when the sample under test is magnetized by an orthogonal magnetic field and undergoes magnetostrictive deformation, the triaxial strain rosette can simultaneously capture the corresponding strain. The magnetostrictive strain component of the first main arm is acquired along the X direction, the magnetostrictive strain component of the second main arm is acquired along the Y direction, and the shear magnetostrictive strain component is acquired along the angle bisector direction. The three types of components work together to characterize the magneto-mechanical coupling deformation state of the sample.

[0121] Furthermore, the acquired multidimensional magnetostrictive strain signals can be transmitted to magnetic signal processing equipment via a dedicated strain-shielded cable.

[0122] S1105. The magnetic field strength signal, magnetic induction intensity signal, and magnetostrictive strain signal are processed to obtain the magnetic property data of the sample under test.

[0123] In this step, the magnetic signal processing device can process the magnetic field strength signal, magnetic induction intensity signal, and magnetostrictive strain signal to obtain magnetic property data including hysteresis loop, permeability, and magnetostriction coefficient.

[0124] In practice, the magnetic field strength and magnetic induction intensity components at the same time point can be mapped one-to-one to draw one-dimensional hysteresis loops in the X and Y directions. If the excitation is an orthogonal alternating magnetic field, a two-dimensional hysteresis trajectory can also be constructed. The permeability in the two directions can be obtained by calculating the ratio of magnetic induction intensity to magnetic field strength. Combining the magnetostrictive strain components and the pre-measured saturation magnetization of the material, the magnetostrictive coefficients in the first main arm direction, the second main arm direction, and the shear magnetostrictive coefficients can be derived.

[0125] Optionally, the magnetic signal processing equipment can store the generated magnetic property data in common formats such as comma-separated values ​​(CSV) and Excel, which facilitates subsequent data organization and analysis. It also supports comparing the current measurement data with historical data and standard data to generate data comparison reports, providing accurate experimental data support for the research and optimization of sheet ferromagnetic materials and the design of power equipment.

[0126] In this embodiment, the magnetic signal processing device applies an orthogonal magnetic field to the sample under test to magnetize it. The magnetic field strength measurement device, magnetic induction intensity measurement device, and strain measurement device sequentially acquire the magnetic field strength signal, magnetic induction intensity signal, and magnetostrictive strain signal. These three signals are then processed to obtain the magnetic property data of the sample under test, including the hysteresis loop, permeability, and magnetostriction coefficient. Through the core process of orthogonal magnetic field magnetization, sequential acquisition by multiple devices, and integrated signal processing, simultaneous measurement of two-dimensional magnetic properties and magnetostrictive effect can be achieved, overcoming the shortcomings of traditional separate equipment and asynchronous data, and significantly improving measurement efficiency and accuracy.

[0127] Figure 12 A schematic diagram of the magnetic signal processing device provided in this application. Please refer to [link / reference]. Figure 12 The magnetic signal processing device 1200 provided in this embodiment includes at least one processor 1201 and a memory 1202. Optionally, the device 1200 also includes a communication component 1203. The processor 1201, the memory 1202, and the communication component 1203 are connected via a bus 1204.

[0128] In a specific implementation, at least one processor 1201 executes computer execution instructions stored in memory 1202, causing at least one processor 1201 to perform the above-described method.

[0129] The specific implementation process of processor 1201 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0130] Optionally, the magnetic signal processing device 1200 provided in this application embodiment can be an industrial control computer or a dedicated data acquisition and processing terminal, adapting to different scenario needs such as laboratory research and development and industrial field testing.

[0131] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor.

[0132] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0133] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0134] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method.

[0135] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described method.

[0136] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0137] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0138] The division of units is merely a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0139] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0140] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0141] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0142] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0143] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A magnetic signal measurement system for sheet-like ferromagnetic materials, characterized in that, include: The sample to be tested, magnetic field strength measuring device, magnetic induction intensity measuring device, strain measuring device, upper fixing plate, lower fixing plate, and magnetic signal processing equipment; The sample to be tested is placed on the lower fixed plate for magnetization under the action of an orthogonal magnetic field; The magnetic field strength measuring device is fixed above the upper fixing plate by a double-headed stud and is used to collect the magnetic field strength signal of the sample to be tested. One end of the magnetic induction intensity measuring device is welded and fixed to the magnetic field intensity measuring device, and the other end is in contact with the sample to be tested, for collecting the magnetic induction intensity signal of the sample to be tested; The strain measurement device is deployed on the upper surface of the sample to be tested and is used to collect the magnetostrictive strain signal of the sample to be tested. The magnetic signal processing device is connected to the magnetic field strength measuring device, the magnetic induction intensity measuring device, and the strain measuring device, and is used to receive and process the magnetic field strength signal, the magnetic induction intensity signal, and the magnetostrictive strain signal to obtain the magnetic property data of the sample to be tested.

2. The system according to claim 1, characterized in that, The test sample includes four main arms extending along a cross-shaped frame.

3. The system according to claim 2, characterized in that, A notch is provided at the angle between adjacent arms of the sample to be tested. The notch is used to constrain the direction of magnetic flux flow, so that the magnetic flux is concentrated in the central region of the sample to be tested.

4. The system according to claim 2, characterized in that, The magnetic field strength measuring device includes: an upper H coil, a lower H coil, an upper collector support plate, and a lower collector support plate; The upper H coil is located above the lower H coil and is fixed below the upper collector support plate; The lower H coil is fixed above the lower collector support plate; The upper collector support plate and the lower collector support plate are connected by the double-ended studs.

5. The system according to claim 4, characterized in that, The magnetic induction intensity measuring device consists of four spring probes. One end of each spring probe passes through a through hole in the lower collector support plate and is welded and fixed to the lower collector support plate. The other end is provided with a probe that makes elastic contact with the sample to be tested.

6. The system according to claim 5, characterized in that, The four spring probes include a first spring probe, a second spring probe, a third spring probe, and a fourth spring probe; The contact point between the first spring probe and the third spring probe is located on the center line of the first main arm of the cross-shaped frame. The contact point between the second spring probe and the fourth spring probe is located on the center line of the second main arm of the cross-shaped frame, and the second main arm is perpendicular to the first main arm.

7. The system according to any one of claims 1-6, characterized in that, The strain measurement device includes a triaxial strain rosette and a strain signal interface disposed on the upper fixed plate; The triaxial strain gauge is attached to the surface of the test sample and connected to the strain signal interface via a signal line passing through a square hole in the upper fixing plate.

8. The system according to any one of claims 1-6, characterized in that, The upper fixing plate and the lower fixing plate are connected by a screw and nut linkage structure.

9. A method for measuring the magnetic signal of a sheet-like ferromagnetic material, characterized in that, A magnetic signal processing device applied to a magnetic signal measurement system for the sheet-like ferromagnetic material according to any one of claims 1-8, comprising: An orthogonal magnetic field is applied to the sample under test to magnetize it. The magnetic field strength signal of the sample under test is acquired by the magnetic field strength measuring device. The magnetic induction intensity signal of the sample under test is acquired by the magnetic induction intensity measuring device. The magnetostrictive strain signal of the sample under test is acquired by the strain measurement device. The magnetic field strength signal, the magnetic induction intensity signal, and the magnetostrictive strain signal are processed to obtain the magnetic property data of the sample under test. The magnetic property data includes the hysteresis loop, magnetic permeability, and magnetostriction coefficient.

10. A magnetic signal processing device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the method as described in claim 9.

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