Method and device for testing magnetic properties of soft magnetic alloy material

Abstract

This invention relates to the field of materials testing technology, specifically to a method and apparatus for testing the magnetic properties of soft magnetic alloy materials. The method includes: fabricating the soft magnetic alloy material to be tested into a ring or rod-shaped sample, and winding a primary excitation coil and a secondary induction coil on the sample; installing the wound sample in a vacuum environment, irradiating the sample with a particle beam, ensuring the irradiation direction of the particle beam is perpendicular to the plane of the sample; passing an excitation current through the primary excitation coil, while simultaneously acquiring the secondary induction signal on the secondary induction coil; calculating the magnetic property parameters of the soft magnetic alloy material to be tested based on the excitation current, the secondary induction signal, and the sample parameters. This method allows for rapid determination of the changing trends of the magnetic property parameters of the soft magnetic alloy material under particle irradiation, with a short testing cycle and reduced time costs.

Description

Technical Field

[0001] This invention relates to the field of materials testing technology, and specifically to a method and apparatus for testing the magnetic properties of soft magnetic alloy materials. Background Technology

[0002] Soft magnetic alloys are widely used in power electronics, energy industries, and scientific research fields, including electromagnetic signal detection, inductive components, energy conversion, and filtering. Soft magnetic alloys operating in particle irradiation environments may experience irradiation damage and modification. Existing materials research and testing methods are all offline measurements. After a certain period of irradiation, the sample is removed from the irradiation environment and subjected to X-ray diffraction, gamma spectroscopy, or Mössbauer spectroscopy for microstructural measurements and analysis. These methods cannot obtain real-time macroscopic magnetic property parameters of soft magnetic alloys, resulting in long testing times and high costs. Summary of the Invention

[0003] The main technical problem solved by this invention is the long time required for existing methods of measuring the performance parameters of soft magnetic alloy materials.

[0004] A method for testing the magnetic properties of soft magnetic alloy materials, comprising:

[0005] The soft magnetic alloy material to be tested is made into a ring or rod-shaped sample, and a primary excitation coil and a secondary induction coil are wound on the sample.

[0006] The wound sample is installed in a vacuum environment and irradiated with a particle beam, with the irradiation direction of the particle beam perpendicular to the plane of the sample.

[0007] An excitation current is passed through the primary excitation coil, and a secondary induction signal is simultaneously acquired from the secondary induction coil.

[0008] The magnetic properties of the soft magnetic alloy material under test are calculated based on the excitation current, the secondary induced signal, and the parameters of the sample.

[0009] In one embodiment, calculating the magnetic property parameters of the soft magnetic alloy material to be tested based on the excitation current, the secondary induced signal, and the parameters of the sample includes:

[0010] Obtain the waveform of the secondary induction signal and acquire the coordinate values ​​of the first and last two points at the top of the waveform;

[0011] The descent time constant τ of the soft magnetic alloy material to be tested is calculated according to the following formula (1). droop ;

[0012]

[0013] In the above formula (1), (t1, lny1) are the coordinates of the head point at the top of the waveform, and (t2, lny2) are the coordinates of the tail point at the top of the waveform.

[0014] The equivalent inductance L2 of the secondary induction coil is calculated according to the following formula (2);

[0015] L2 = R L τ droop (2)

[0016] In the above formula (2), R L The equivalent resistance of the secondary induction coil;

[0017] The relative permeability μ of the soft magnetic alloy material to be tested is calculated according to the following formula (3). r ;

[0018]

[0019] In the above formula (3), μ0 is the air permeability, N 2 denoted as the number of turns in the secondary coil, and b and a are the outer and inner diameters of the magnetic ring made of soft magnetic alloy material, respectively.

[0020] In one embodiment, the coordinate values ​​of the first and last two points at the top of the acquired waveform include:

[0021] The coordinate values ​​of five points adjacent to the top and bottom coordinate points of the waveform are collected respectively. After smoothing and averaging the coordinate values ​​of the five collected coordinate points, the coordinate values ​​of the top and bottom coordinate points are obtained respectively.

[0022] A magnetic property testing device for soft magnetic alloy materials includes: a particle beamline generator, a controllable pulse current source, a signal acquisition unit, and a processor;

[0023] The particle beamline generator is used to generate a particle beamline and to irradiate a sample made of a soft magnetic alloy material to be tested, with the irradiation direction of the particle beamline perpendicular to the plane of the sample; a primary excitation coil and a secondary induction coil are wound on the sample.

[0024] The controllable pulse current source is used to generate excitation current and to pass the excitation current into the primary excitation coil of the sample;

[0025] The signal acquisition device is used to acquire the secondary induced signal on the secondary induction coil;

[0026] The processor is used to calculate the magnetic property parameters of the soft magnetic alloy material under test based on the excitation current, the secondary induction signal, and the parameters of the sample.

[0027] In one embodiment, a memory is also included for storing data information on the magnetic property parameters of the soft magnetic alloy material.

[0028] In one embodiment, the memory is a cloud memory that is wirelessly connected to the processor.

[0029] In one embodiment, a mounting bracket is also included for securing the sample made of the soft magnetic alloy material to be tested.

[0030] In one embodiment, the mounting bracket includes a frame base, two sets of fixing rods, and four clamping members; each of the two sets of fixing rods is provided with a plurality of connecting holes evenly distributed thereon; the frame base is provided with two sets of connecting holes, one set of fixing rods being detachably connected to one set of connecting holes on the frame base; the other set of fixing rods is detachably connected to the first set of fixing rods through connecting holes; one end of each of the four clamping members is also detachably connected to the fixing rods through connecting holes, and the other end of each of the four clamping members is used to fix the sample.

[0031] In one embodiment, calculating the magnetic property parameters of the soft magnetic alloy material to be tested based on the excitation current, the secondary induced signal, and the parameters of the sample includes:

[0032] Obtain the waveform of the secondary induction signal and acquire the coordinate values ​​of the first and last two points at the top of the waveform;

[0033] The descent time constant τ of the soft magnetic alloy material to be tested is calculated according to the following formula (1). droop ;

[0034]

[0035] In the above formula (1), (t1, lny1) are the coordinates of the head point at the top of the waveform, and (t2, lny2) are the coordinates of the tail point at the top of the waveform.

[0036] The equivalent inductance L2 of the secondary induction coil is calculated according to the following formula (2);

[0037] L2 = R L τ droop (2)

[0038] In the above formula (2), R L The equivalent resistance of the secondary induction coil;

[0039] The relative permeability μ of the soft magnetic alloy material to be tested is calculated according to the following formula (3). r ;

[0040]

[0041] In the above formula (3), μ0 is the air permeability, N 2 denoted as the number of turns in the secondary coil, and b and a are the outer and inner diameters of the magnetic ring made of soft magnetic alloy material, respectively.

[0042] In one embodiment, the coordinate values ​​of the first and last two points at the top of the acquired waveform include:

[0043] The coordinate values ​​of five points adjacent to the top and bottom coordinate points of the waveform are collected respectively. After smoothing and averaging the coordinate values ​​of the five collected coordinate points, the coordinate values ​​of the top and bottom coordinate points are obtained respectively.

[0044] The method for testing the magnetic properties of soft magnetic alloy materials according to the above embodiments includes: forming the soft magnetic alloy material to be tested into a ring or rod-shaped sample, and winding a primary excitation coil and a secondary induction coil on the sample; installing the wound sample in a vacuum environment, irradiating the sample with a particle beam, and ensuring that the irradiation direction of the particle beam is perpendicular to the plane of the sample; passing an excitation current through the primary excitation coil, and simultaneously acquiring the secondary induction signal on the secondary induction coil; calculating the magnetic property parameters of the soft magnetic alloy material to be tested based on the excitation current, the secondary induction signal, and the parameters of the sample. This method can quickly obtain the magnetic property parameters of the soft magnetic alloy material, has a short testing cycle, and saves time and costs. Attached Figure Description

[0045] Figure 1 This is a flowchart of a method for testing the magnetic properties of soft magnetic alloy materials according to an embodiment of this application;

[0046] Figure 2 The waveforms of the primary excitation signal and the secondary induction signal in an embodiment of this application are shown.

[0047] Figure 3 This is a schematic diagram of the secondary induction signal drop waveform in an embodiment of this application;

[0048] Figure 4 This is a structural block diagram of the test device according to an embodiment of this application;

[0049] Figure 5 This is an equivalent circuit diagram of the signal processor in an embodiment of this application;

[0050] Figure 6 This is a hysteresis curve diagram of the soft magnetic alloy material in the embodiments of this application;

[0051] Figure 7 This is a schematic diagram of the mounting bracket structure according to an embodiment of this application. Detailed Implementation

[0052] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0053] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0054] In this embodiment of the invention, a novel method for testing the magnetic properties of soft magnetic alloy materials is proposed. A primary excitation coil and a secondary induction coil are wound onto the sample. Then, in a vacuum environment, the sample is irradiated using a particle beam, with the irradiation direction of the particle beam perpendicular to the plane of the sample. Simultaneously, an excitation current is passed through the primary excitation coil, and the secondary induction signal on the secondary induction coil is collected. The magnetic property parameters of the soft magnetic alloy material under test are calculated based on the excitation current, the secondary induction signal, and the sample parameters. This method differs from existing methods that require irradiation for a certain period followed by microstructural measurements and analysis using X-ray diffraction, gamma-ray spectroscopy, or Mössbauer spectrometry after the sample has been removed from the irradiation environment. This method allows for a single measurement, shortening the testing cycle and saving time and costs.

[0055] Example 1:

[0056] Please refer to Figure 1 This embodiment provides a method for testing the magnetic properties of soft magnetic alloy materials, including:

[0057] Step 101: The soft magnetic alloy material to be tested is formed into a ring or rod-shaped sample, and a primary excitation coil and a secondary induction coil are wound on the sample. In this embodiment, the soft magnetic alloy material to be tested is formed into a ring shape as an example, such as... Figure 2A primary excitation coil N1 is wound on one side of the ring, and a secondary induction coil N2 is wound on the other side of the ring. For example, if the sample is rod-shaped, the primary excitation coil N1 is wound at one end closer to the rod, and the secondary induction coil N2 is wound at the other end closer to the rod.

[0058] Step 102: Install the wound sample in a vacuum environment and irradiate the sample using a particle beam, ensuring that the irradiation direction of the particle beam is perpendicular to the plane containing the sample. For example, in this embodiment, the irradiation direction of the particle beam is perpendicular to the plane containing the ring.

[0059] Step 103: Pass excitation current through the primary excitation coil and simultaneously collect the secondary induced signal on the secondary induction coil;

[0060] Step 104: Calculate the magnetic properties of the soft magnetic alloy material to be tested based on the excitation current, secondary induction signal, and sample parameters.

[0061] Specifically, in step 104, the calculation of the magnetic property parameters of the soft magnetic alloy material to be tested based on the excitation current, secondary induced signal, and sample parameters includes:

[0062] The waveform of the secondary induced signal is obtained as follows: Figure 2 As shown, Figure 3 The coordinates of the first and last two points at the top of the waveform are collected, which is equivalent to collecting the coordinates of the start and end points of the descent in the waveform.

[0063] The descent time constant τ of the soft magnetic alloy material to be tested is calculated according to the following formula (1). droop ;

[0064]

[0065] In the above formula (1), (t1, lny1) are the coordinates of the head point at the top of the waveform, and (t2, lny2) are the coordinates of the tail point at the top of the waveform.

[0066] Calculate the equivalent inductance L2 of the secondary induction coil according to the following formula (2);

[0067] L2 = R L τ droop (2)

[0068] In the above formula (2), R L This is the equivalent resistance of the secondary induction coil;

[0069] The relative permeability μ of the soft magnetic alloy material to be tested is calculated according to the following formula (3). r ;

[0070]

[0071] In the above formula (3), μ0 is the air permeability, N 2 denoted as the number of turns in the secondary coil, and b and a are the outer and inner diameters of the magnetic ring made of soft magnetic alloy material, respectively.

[0072] In this embodiment, acquiring the coordinate values ​​of the head and tail points at the top of the waveform includes: acquiring the coordinate values ​​of five points adjacent to the head and tail points at the top of the waveform, respectively; smoothing and averaging the coordinate values ​​of the five acquired points to obtain the coordinate values ​​of the head and tail points. This makes the acquired head and tail coordinate values ​​more accurate, thereby improving the measurement results of the soft magnetic alloy material properties. For example, the coordinates (tN, yN) of five points adjacent to the head point at the top of the waveform (N = 1, 2, 3, 4, 5) are read, and the coordinate value of the head point is obtained by averaging the coordinates of the five points.

[0073] It should be noted that the waveform of the secondary induction signal mentioned above can be obtained by inputting the acquired secondary induction signal into an oscilloscope. The coordinate values ​​of the five points adjacent to the top and bottom coordinate points of the waveform can also be obtained through well-known software acquisition methods, which will not be elaborated in this embodiment.

[0074] The method described in this embodiment can quickly obtain the relative permeability change trend of the soft magnetic alloy material under particle irradiation environment without the need for staged testing, resulting in a short testing cycle and saving time and costs.

[0075] Example 2:

[0076] This embodiment provides a device for testing the magnetic properties of soft magnetic alloy materials, such as... Figure 4 The device in this embodiment includes: a particle beamline generator 20, a controllable pulse current source 21, a signal acquisition unit 22, and a processor 23.

[0077] The particle beam generator 20 generates a particle beam 27, which is then used to irradiate the sample made of the soft magnetic alloy material under test, with the irradiation direction of the particle beam perpendicular to the plane containing the sample 26. A primary excitation coil N1 and a secondary induction coil N2 are wound on the sample 26. A controllable pulse current source 21 generates an excitation current and supplies it to the primary excitation coil of the sample; a signal acquisition unit 22 acquires the secondary induction signal from the secondary induction coil N2. A processor 23 communicates with the controllable pulse current source 21 and the signal acquisition unit 22 via Ethernet (Local Area Network). The processor 23 calculates the magnetic property parameters of the soft magnetic alloy material under test based on the excitation current, the secondary induction signal, and the sample parameters. Specifically, to enable real-time online measurement of the changes in the magnetic property parameters of the soft magnetic alloy material in a particle irradiation environment, a system such as... Figure 4The image shows an online testing platform for particle-irradiated soft magnetic alloy material samples. The samples can be made into rings or rods and wound with a primary coil N1 and a secondary coil N2. The samples are mounted in a vacuum chamber on the particle beam and fixed by an adjustable hollow cross-section aluminum alloy rectangular support (e.g., ...). Figure 7 The magnetic ring is placed perpendicular to the direction of the particle irradiation beam and is fixed by a glass wire, a fixed rod on a movable rod on the support, and a connecting hole.

[0078] In this embodiment, the processor 23 is a local computer, which calculates the magnetic properties parameters of the soft magnetic alloy material to be tested based on the excitation current, secondary induction signal and sample parameters according to a preset calculation method.

[0079] In one embodiment, the device of this application further includes a memory 24, which is communicatively connected to a local computer via a LAN bus. The memory 24 is used to store data information on the magnetic property parameters of the soft magnetic alloy material. For example, it can be used to store historical magnetic property parameter data for easy retrieval and viewing by technicians.

[0080] Preferably, in this embodiment, the memory 24 is a cloud memory, which is wirelessly connected to the local computer. This allows technicians to remotely access the cloud memory to obtain historical data on magnetic performance parameters.

[0081] In one embodiment, the device further includes a signal processor 25, which includes a current-to-voltage conversion circuit, a signal amplification and feedback circuit, etc. The current-to-voltage conversion circuit and the signal amplification and feedback circuit are mainly used to perform current-to-voltage conversion and amplification processing on the acquired secondary induced signal, thereby increasing the peak drop constant of the secondary induced signal. The larger the closed-loop amplification factor of the amplification circuit, the higher the equivalent R... f / A+R L The smaller the value, the larger the output signal drop time constant of the signal processor. With a fixed sampling rate, this results in more effective data and higher measurement accuracy. The equivalent circuit of the signal processor 25 is as follows: Figure 5 As shown.

[0082] In this embodiment, a primary excitation coil and a secondary induction coil are wound on a 26-ring soft magnetic alloy sample. While receiving particle irradiation, testing is conducted via remotely controlled external excitation current or a programmable pulse signal supplied to the primary excitation coil. The secondary induction signal of the sample's secondary induction coil is acquired in real time. After I-V conversion (current signal to voltage signal) and amplification, a post-processing algorithm is used to monitor the magnetic property parameters of the soft magnetic alloy sample in real time. These measurement results are published on a LAN via EPICS PV data and recorded in a remote cloud storage (equivalent to a document server). Historical records of the magnetic property parameters of the soft magnetic alloy material can be obtained from any computer within the LAN by accessing the PV data.

[0083] The apparatus in this embodiment also includes a mounting bracket for fixing the sample made of the soft magnetic alloy material to be tested. Figure 7 The mounting bracket in this embodiment includes a frame base 261, two sets of fixing rods 263, and four clamping members 264. One set of fixing rods is arranged horizontally in parallel, and the other set is arranged vertically in parallel. Both sets of fixing rods 263 are evenly provided with multiple connecting holes 262. The frame base 261 is provided with multiple connecting holes, and one set of fixing rods is detachably connected to one set of connecting holes on the frame base 261. The other set of fixing rods is detachably connected to this set of fixing rods through connecting holes. Thus, both sets of fixing rods are adjustable, meaning the rectangular frame formed by the two sets of fixing rods is also adjustable in size to accommodate samples of different sizes. One end of each of the four clamping members 264 is also detachably connected to a fixing rod through a connecting hole. Specifically, in this embodiment, the fixing end of each clamping member 264 is detachably connected to the connection point of two fixing rods, and the clamping ends of the four clamping members 264 are used to fix the sample 26. In other embodiments, the fixed ends of the four clamping members 264 are rotatably connected to the connection points of the fixing rods, that is, when clamping the sample 26, the clamping members 264 can be rotated so that the clamping ends of the clamping members 264 just clamp the sample 26.

[0084] In this embodiment, the calculation of the magnetic property parameters of the soft magnetic alloy material to be tested based on the excitation current, secondary induced signal, and the parameters of the sample includes:

[0085] Acquire the waveform of the secondary induced signal and collect the coordinate values ​​of the first and last two points at the top of the waveform;

[0086] The descent time constant τ of the soft magnetic alloy material to be tested is calculated according to the following formula (1). droop ;

[0087]

[0088] In the above formula (1), (t1, lny1) are the coordinates of the head point at the top of the waveform, and (t2, lny2) are the coordinates of the tail point at the top of the waveform.

[0089] The equivalent inductance L2 of the secondary induction coil is calculated according to the following formula (2);

[0090] L2 = R L τ droop (2)

[0091] In the above formula (2), R L This is the equivalent resistance of the secondary induction coil;

[0092] The relative permeability μ of the soft magnetic alloy material to be tested is calculated according to the following formula (3). r ;

[0093]

[0094] In the above formula (3), μ0 is the air permeability, N 2 denoted as the number of turns in the secondary coil, and b and a are the outer and inner diameters of the magnetic ring made of soft magnetic alloy material, respectively.

[0095] In this embodiment, the acquisition of the coordinate values ​​of the head and tail points at the top of the waveform includes: acquiring the coordinate values ​​of five points adjacent to the head and tail coordinate points at the top of the waveform respectively; and after smoothing and averaging the coordinate values ​​of the five acquired coordinate points, the coordinate values ​​of the head and tail coordinate points are obtained respectively.

[0096] in, Figure 5 This is equivalent to a current transformer circuit, which includes a resistor R. L R f Capacitor C s And operational amplifier A, whose gain is A (for example, the open-loop gain of op-amp OP27 is 1.8 × 10⁻⁶). 6 When a rectangular current pulse signal is input into the primary excitation coil, and the pulse peak is ΔT, the input resistance of the operational amplifier in the IV converter circuit is R. f / A, because the op-amp amplification factor A is generally around 10. 5 Or on the order of magnitude higher, so the equivalent resistance in the denominator will be approximately equal to R. L The time required for the output signal amplitude to drop to 1 / e = 36.6% of its original amplitude is τ. droop .

[0097]

[0098] Here, the equivalent inductance of the secondary coil L2 = μ r μ0N 2hln(b / a) / (2π), μ0 is the air permeability, μ r Where N is the relative permeability, N2 is the number of turns in the secondary coil (generally N2 > 200 to increase the top drop time constant), and b and a are the outer and inner diameters of the soft magnetic alloy ring, respectively. It can be seen that in order to increase τ... droop For measurement accuracy (assuming better than ±1% error), it is best to choose ΔT > τ. droop The test uses rectangular pulses, and the sampling rate of the digital oscilloscope or signal acquisition system must meet 3*100 / ΔT, with an ADC of at least 10 bits. Additionally, the larger L is, or the equivalent resistance R of the coil and cable... L The smaller τ is droop The larger the value, the slower the rectangular current pulse drop of the secondary coil output. With the same sampling rate, there are more effective data points within the ΔT duration, and the higher the measurement accuracy.

[0099] In this embodiment, the signal acquisition device 22 is an oscilloscope, for example. Figure 4 A 4-channel, 200MHz bandwidth digital oscilloscope (model R&S RTB2004) equipped with function generation was placed in a non-irradiation environment. It generated a synchronously triggered 25Hz (not exceeding 1kHz) square wave pulse signal, which was connected via the CAL+ and CAL- cores of a shielded four-core cable (approximately 100 meters long) to the primary coil (1 turn) of a nanocrystalline alloy ring placed in the irradiation platform, generating an excitation current. The output signal of the secondary coil (200 turns) was connected via the other two cores (SIGNAL+, SIGNAL-) of the four-core cable to the input of an electronics chassis located in the sample room for signal filtering, IV conversion, and amplification. The signal processor 25 output signal was sampled in real-time by the digital oscilloscope. The signal sampled in real-time by the digital acquisition system (digital oscilloscope or digital acquisition card, etc.) was a pulse signal with a peak drop characteristic, as shown in Figure 3. We can deduce the relative permeability μ of the sample magnetic ring from the signal peak drop using the method described above. r .

[0100] The digital oscilloscope is connected to the campus LAN and assigned a fixed IP address. Using NI's LabVIEW software, the oscilloscope's function generation and digital sampling can be remotely programmed and controlled from a laboratory computer terminal. Currently, the excitation signal on the sample magnetic ring is continuously supplied, and the signal from the digital oscilloscope is read back and post-processed hourly. This allows us to obtain the relative permeability μ of the sample magnetic ring. r Measurement curves showing how the magnetic properties of soft magnetic alloys change over time. This is also used for measuring other magnetic properties of soft magnetic alloys, such as the saturation magnetic induction B. s Coercivity H c and residual magnetic induction intensity B rSimilarly, based on the control of remote excitation current and the real-time sampling of supporting electronic outputs, a pattern can be depicted. Figure 6 The hysteresis curve of the soft magnetic alloy material shown was obtained from the curve. Figure 6 In the middle: The trend line during the upward process of the blue curve corresponds to the saturation magnetic induction strength B. s The intersection point with the positive vertical axis is the remanent magnetic induction intensity B. r The point where it intersects the positive x-axis is the coercive force H. c The measurement methods for this part are detailed in the national standards, and will not be repeated in this embodiment.

[0101] As can be seen, the measuring device in this embodiment can realize rapid online measurement of the properties of soft magnetic alloy materials, with a short measurement cycle and high measurement accuracy, which greatly saves time costs.

[0102] The above examples illustrate the present invention only to aid in understanding it and are not intended to limit the scope of the invention. Those skilled in the art can make various simple deductions, modifications, or substitutions based on the principles of this invention.

Claims

1. A method for testing the magnetic properties of soft magnetic alloy materials, characterized in that, include: The soft magnetic alloy material to be tested is made into a ring-shaped sample, and a primary excitation coil and a secondary induction coil are wound on the sample. The wound sample is installed in a vacuum environment and irradiated with a particle beam, with the irradiation direction of the particle beam perpendicular to the plane of the sample. An excitation current is passed through the primary excitation coil, and a secondary induction signal is simultaneously acquired from the secondary induction coil. The waveform of the secondary induction signal is obtained, and the coordinate values ​​of five points adjacent to the head and tail coordinate points at the top of the waveform are collected respectively. After smoothing and filtering the coordinate values ​​of the five collected coordinate points and averaging them, the coordinate values ​​of the head and tail coordinate points are obtained respectively. The jacking time constant of the soft magnetic alloy material to be tested is calculated according to the following formula (1). ; （1） In the above formula (1), (t1,y1) are the coordinates of the head point at the top of the waveform, and (t2,y2) are the coordinates of the tail point at the top of the waveform. The equivalent inductance of the secondary induction coil is calculated according to the following formula (2). ; （2） In the above formula (2), R L The equivalent resistance of the secondary induction coil; The relative permeability of the soft magnetic alloy material to be tested is calculated according to the following formula (3). μ r ; （3） In the above formula (3), μ 0 represents the permeability of air, N represents the number of turns in the secondary coil, b and a represent the outer and inner diameters of the magnetic ring made of the soft magnetic alloy material to be tested, respectively, and h represents the height of the magnetic ring made of the soft magnetic alloy material to be tested.

2. A device for testing the magnetic properties of soft magnetic alloy materials, characterized in that, Includes: a particle beamline generator, a controllable pulsed current source, a signal acquisition unit, and a processor; The particle beamline generator is used to generate a particle beamline and to irradiate a sample made of a soft magnetic alloy material to be tested, with the irradiation direction of the particle beamline perpendicular to the plane of the sample; a primary excitation coil and a secondary induction coil are wound on the sample. The controllable pulse current source is used to generate excitation current and to pass the excitation current into the primary excitation coil of the sample; The signal acquisition device is used to acquire the secondary induced signal on the secondary induction coil; After acquiring the waveform of the secondary sensing signal and collecting the coordinate values ​​of five points adjacent to the head and tail coordinate points at the top of the waveform, the processor performs smoothing filtering and averaging on the collected coordinate values ​​of the five coordinate points to obtain the coordinate values ​​of the head and tail coordinate points respectively. The jacking time constant of the soft magnetic alloy material to be tested is calculated according to the following formula (1). ; （1） In the above formula (1), (t1,y1) are the coordinates of the head point at the top of the waveform, and (t2,y2) are the coordinates of the tail point at the top of the waveform. The equivalent inductance of the secondary induction coil is calculated according to the following formula (2). ; （2） In the above formula (2), R L The equivalent resistance of the secondary induction coil; The relative permeability of the soft magnetic alloy material to be tested is calculated according to the following formula (3). μ r ; （3） In the above formula (3), μ 0 represents the permeability of air, N represents the number of turns in the secondary coil, b and a represent the outer and inner diameters of the magnetic ring made of the soft magnetic alloy material to be tested, respectively, and h represents the height of the magnetic ring made of the soft magnetic alloy material to be tested.

3. The magnetic property testing device for soft magnetic alloy materials as described in claim 2, characterized in that, It also includes a memory for storing data on the magnetic properties of the soft magnetic alloy material.

4. The magnetic property testing device for soft magnetic alloy materials as described in claim 3, characterized in that, The memory is a cloud memory, which is wirelessly connected to the processor.

5. The magnetic property testing device for soft magnetic alloy materials as described in claim 2, characterized in that, It also includes a mounting bracket for securing the sample made of the soft magnetic alloy material to be tested.

6. The magnetic property testing device for soft magnetic alloy materials as described in claim 5, characterized in that, The mounting frame includes a frame base, two sets of fixing rods, and four clamping members. Each of the two sets of fixing rods has multiple evenly distributed connecting holes. The frame base has two sets of connecting holes, one set of fixing rods being detachably connected to one set of connecting holes on the frame base. The other set of fixing rods is detachably connected to this set of fixing rods via connecting holes. One end of each of the four clamping members is also detachably connected to the fixing rods via connecting holes, and the other end of each clamping member is used to fix the sample.

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