Method and device for controlling high-precision magnetic measurement device and high-precision magnetic measurement device

Abstract

The invention relates to the technical field of test and measurement, and discloses a method for controlling a high-precision magnetic measurement device, and the high-precision magnetic measurement device comprises a sample rod for fixing a sample, and at least two gradient magnetic field generation devices for generating gradient magnetic fields in different directions. The method comprises the following steps: starting a gradient magnetic field generation device corresponding to a target direction in response to a control instruction for measuring magnetic characteristics in the target direction; when a preset measurement condition is met, obtaining target vibration information of the sample and / or the sample rod in a target direction; and acquiring the magnetic characteristics of the sample in the target direction according to the target vibration information of the sample and / or the sample rod in the target direction. By arranging the gradient magnetic field generating devices in different directions, torque can be applied to the sample from different directions without rotating the sample, so that the magnetic characteristics of the sample in two orthogonal directions are measured, and the test precision is improved. The invention further discloses a device for controlling the high-precision magnetic measurement device and the high-precision magnetic measurement device.

Description

Technical Field

[0001] The present application relates to the field of testing and measuring technology, for example, to a method and device for controlling a high-precision magnetic measuring device, and a high-precision magnetic measuring device. Background Art

[0002] Currently, the existing magnetic measurement methods are limited by the design and simplicity of operation of the equipment, and can often only measure vibration information in one direction of the sample. However, some magnetic materials may exhibit higher permeability or lower coercivity in a specific direction, which may be completely different in other directions. The magnetization characteristics of magnetic materials may vary significantly in different directions. Single-direction measurement cannot provide enough data to accurately describe the magnetization process of the sample, which may make the existing technology insufficient in test accuracy.

[0003] In order to overcome the above limitations, the related technology realizes vibration measurement in two directions by rotating the sample in order to improve the accuracy of the test. By testing the sample at different angles, the magnetization information of the sample in two orthogonal directions is collected, thereby providing more comprehensive magnetic data to more accurately characterize the magnetic characteristics of the material.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art: The measurement method of the related art improves the accuracy of the test to a certain extent by rotating the sample to obtain magnetic characteristics in different directions. However, rotating the sample will change the placement angle of the sample. The magnetic characteristics measured before and after rotating the sample are the magnetic characteristics of the sample at different angles. Therefore, the related technology is still a single-direction measurement at the same angle, resulting in a low accuracy of the test results.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] The embodiments of the present disclosure provide a method and device for controlling a high-precision magnetic measurement device, and a high-precision magnetic measurement device, so as to measure the magnetic characteristics of a sample in different directions without rotating the sample, thereby improving the accuracy of magnetic measurement.

[0008] In some embodiments, the high-precision magnetic measurement device includes a sample rod for fixing a sample and at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; the method for controlling the high-precision magnetic measurement device includes: in response to a control instruction for measuring magnetic characteristics in a target direction, starting the gradient magnetic field generating device corresponding to the target direction; when preset measurement conditions are met, obtaining target vibration information of the sample and / or the sample rod in the target direction; and obtaining the magnetic characteristics of the sample in the target direction based on the target vibration information of the sample and / or the sample rod in the target direction.

[0009] Optionally, the preset measurement conditions include: the amplitude of the sample and / or the sample rod is within a target range; wherein the minimum value of the target range is the maximum amplitude of the sample and / or the sample rod minus a preset value, and the maximum value of the target range is the maximum amplitude of the sample and / or the sample rod.

[0010] Optionally, the high-precision magnetic measurement device also includes at least one movable laser vibrometer; obtaining the amplitude of the sample and / or the sample rod includes: starting the laser vibrometer, and moving the laser vibrometer to a measurement area corresponding to the target direction, and measuring the amplitude of the sample and / or the sample rod.

[0011] Optionally, the high-precision magnetic measurement device also includes a laser vibration measuring device arranged corresponding to at least two gradient magnetic field generating devices; obtaining the amplitude of the sample and / or the sample rod includes: starting the laser vibration measuring device arranged corresponding to the gradient magnetic field generating device corresponding to the target direction, and measuring the amplitude of the sample and / or the sample rod.

[0012] Optionally, the high-precision magnetic measurement device further includes a bias magnetic field generating device; after responding to a control instruction to measure magnetic characteristics in a target direction, it further includes: starting the bias magnetic field generating device.

[0013] Optionally, the preset measurement condition also includes: an angle between the sample and the bias magnetic field reaches a set angle.

[0014] Optionally, the high-precision magnetic measurement device also includes a displacement device connected to the sample rod; the angle between the sample and the bias magnetic field is made to reach a set angle according to the following method: the position of the sample rod is controlled by the displacement device until the angle between the sample and the bias magnetic field reaches the set angle.

[0015] Optionally, obtaining target vibration information of the sample and / or the sample rod in a target direction includes: changing the magnitude of the magnetic field strength of the bias magnetic field, and obtaining vibration information of the sample and / or the sample rod during the change of the magnetic field strength of the bias magnetic field.

[0016] In some embodiments, the device for controlling a high-precision magnetic measurement device includes: a processor and a memory storing program instructions, and the processor is configured to execute the above-mentioned method for controlling a high-precision magnetic measurement device when executing the program instructions.

[0017] In some embodiments, the high-precision magnetic measurement device includes: a high-precision magnetic measurement device body, including a sample rod for fixing a sample and at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; and the above-mentioned device for controlling the high-precision magnetic measurement device is installed on the high-precision magnetic measurement device body.

[0018] The method and device for controlling a high-precision magnetic measurement device and the high-precision magnetic measurement device provided by the embodiments of the present disclosure can achieve the following technical effects: In response to a control instruction for measuring the magnetic characteristics in a target direction, a gradient magnetic field generating device corresponding to the target direction is started, and when a preset measurement condition is met, target vibration information of the sample and / or the sample rod in the target direction is obtained, and the magnetic characteristics of the sample in the target direction are obtained based on the target vibration information of the sample and / or the sample rod in the target direction. By setting at least two gradient magnetic field generating devices in different directions, torque can be applied to the sample from different directions without rotating the sample and / or the sample rod, so that vibration information of the sample in different target directions can be obtained, and the magnetic characteristics of the sample in two orthogonal directions can be measured, thereby improving the accuracy of the test.

[0019] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein: Figure 1 It is a partial front view structural schematic diagram of a high-precision magnetic measurement device provided by an embodiment of the present disclosure; Figure 2 is a partial top view structural schematic diagram of a high-precision magnetic measurement device provided by an embodiment of the present disclosure; Figure 3 is a schematic diagram of the installation structure of the second gradient magnetic field generating device provided in an embodiment of the present disclosure; Figure 4 is a schematic diagram of a method for controlling a high-precision magnetic measurement device provided by an embodiment of the present disclosure; Figure 5 It is a schematic diagram of a device for controlling a high-precision magnetic measurement device provided by an embodiment of the present disclosure.

[0021] Reference numerals: 10: displacement device; 11: fixing structure; 12: rod-shaped structure; 13: fixing device; 14: reflective device; 20: first gradient magnetic field generating device; 21: second gradient magnetic field generating device; 22: first laser vibrometer; 23: second laser vibrometer; 24: bias magnetic field generating device; 25: first through hole; 26: second through hole; 27: laser beam; 28: bracket structure; 29: first gradient magnetic field generating unit; 30: second gradient magnetic field generating unit; 800: device for controlling a high-precision magnetic measurement device; 801: processor; 802: memory; 803: communication interface; 804: bus. DETAILED DESCRIPTION

[0022] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0024] Combination Figures 1 to 3 As shown, an embodiment of the present disclosure provides a high-precision magnetic measurement device, including a sample rod, a magnetic field generating device, a vibration measurement component and a data processing device. The sample rod includes a sample holder for fixing the sample. The magnetic field generating device includes at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; wherein the sample is located in the action area of ​​the gradient magnetic fields in different directions. The vibration measurement component includes at least one laser vibration measuring device for obtaining vibration information of the sample and / or the sample rod. The data processing device is connected to the vibration measurement component for analyzing the vibration information of the sample and / or the sample rod.

[0025] In the embodiment of the present disclosure, the magnetic field generating device includes at least two gradient magnetic field generating devices that generate gradient magnetic fields in different directions, such as Figure 2 As shown, a gradient magnetic field generating device is set in the X and Y directions respectively, that is, Figure 2 or, a gradient magnetic field generating device is respectively provided in the X, Y and Z directions, etc. Specifically, the number of gradient magnetic field generating devices can be set according to the test requirements.

[0026] In the embodiment of the present disclosure, the gradient magnetic field generating device can be any device that can generate a gradient magnetic field, such as a gradient coil and / or a device composed of a gradient coil wound on a body and / or other devices composed of a gradient coil. The gradient magnetic field generating device includes a first gradient magnetic field generating unit 29 and a second gradient magnetic field generating unit 30 arranged in pairs. The sample can be set at any position between the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30, and can be set specifically according to the measurement requirements. Specifically, the sample can be set in the middle of the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30, or in an area close to the first gradient magnetic field generating unit 29 or in an area close to the second gradient magnetic field generating unit 30. In this way, the magnetic field line is emitted from a gradient magnetic field generating unit, passes through the sample area, and then enters the other gradient magnetic field generating unit. In the middle area of ​​the two gradient magnetic field generating units, the rate of change of the magnetic field (i.e., the gradient) is the highest. By setting the sample between the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30, the magnetic field gradient is large, so that the magnetic response of the sample can be measured more accurately.

[0027] In the embodiment of the present disclosure, the vibration measurement component includes at least one laser vibration measuring device arranged corresponding to the gradient magnetic field generating device. For example, the vibration measurement component may include at least one movable laser vibration measuring device, so as to measure the vibration information of the sample and / or the sample rod under the action of gradient magnetic fields in different directions by moving to different positions. The vibration measurement component may also include at least two laser vibration measuring devices arranged corresponding to the gradient magnetic field generating device in different directions, such as, Figure 2 As shown, the gradient magnetic field generating devices in the X and Y directions are respectively provided with a corresponding first laser vibrometer 22 in the X direction and a second laser vibrometer 23 in the Y direction; or, the gradient magnetic field generating devices in the X, Y and Z directions are respectively provided with a corresponding first laser vibrometer 22 in the X direction, a second laser vibrometer 23 in the Y direction and a third laser vibrometer in the Z direction. Specifically, the number of laser vibrometers can be set according to the test requirements. The laser vibrometer can be a laser Doppler vibrometer. The laser beam 27 emitted by the laser Doppler vibrometer is irradiated on the sample and / or the sample rod, and then the laser Doppler vibrometer receives the laser beam 27 reflected by the sample and / or the sample rod, and measures the Doppler frequency shift of the reflected laser beam 27 to extract the vibration of the sample and / or the sample rod.

[0028] The high-precision magnetic measurement device includes a sample rod, a magnetic field generating device, a vibration measurement component and a data processing device. The sample rod includes a sample holder for fixing the sample. The magnetic field generating device includes at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions, and the sample is located in the action area of ​​the gradient magnetic fields in different directions. The vibration measurement component includes at least one laser vibration measuring device for obtaining vibration information of the sample and / or the sample rod in gradient magnetic fields in different directions. The data processing device is connected to the vibration measurement component and is used to analyze the vibration information of the sample and / or the sample rod. By setting at least two gradient magnetic field generating devices in different directions and at least one laser vibration measuring device that can measure vibration information in different directions, the vibration information of the sample in orthogonal directions can be obtained without rotating the sample and / or the sample rod, thereby measuring the magnetic characteristics of the sample in two orthogonal directions to improve the accuracy of the test.

[0029] Optionally, the magnetic field generating device includes at least one bias magnetic field generating device 24. The at least one bias magnetic field generating device 24 is used to generate a bias magnetic field; wherein the sample is located in the action area of ​​the bias magnetic field.

[0030] In the embodiment of the present disclosure, the magnetic field generating device further includes at least one bias magnetic field generating device 24, such as, Figure 1 and Figure 2 As shown, a bias magnetic field generating device 24 is provided in the X direction; or, a bias magnetic field generating device 24 is provided in the Y direction; or, a bias magnetic field generating device 24 is provided in the X direction and the Y direction respectively. Specifically, the number of bias magnetic field generating devices 24 can be set according to the test requirements.

[0031] In the embodiment of the present disclosure, the bias magnetic field generating device 24 includes a first bias magnetic field generating unit and a second bias magnetic field generating unit arranged in pairs. Among them, the sample is arranged between the first bias magnetic field generating unit and the second bias magnetic field generating unit. The first bias magnetic field generating unit and the second bias magnetic field generating unit can be electromagnets and / or electromagnetic coils. For example, the first bias magnetic field generating unit is an electromagnet, and the second bias magnetic field generating unit is an electromagnet; or, the first bias magnetic field generating unit is an electromagnetic coil, and the second bias magnetic field generating unit is an electromagnetic coil; or, the first bias magnetic field generating unit is an electromagnet, and the second bias magnetic field generating unit is an electromagnetic coil; or, the first bias magnetic field generating unit is an electromagnet, and the second bias magnetic field generating unit is an electromagnetic coil; or, the first bias magnetic field generating unit is an electromagnetic coil, and the second bias magnetic field generating unit is an electromagnet. The sample can be arranged at any position between the first bias magnetic field generating unit and the second bias magnetic field generating unit, and can be arranged specifically according to the measurement requirements. Specifically, the sample can be arranged in the middle of the first bias magnetic field generating unit and the second bias magnetic field generating unit, or in an area close to the first bias magnetic field generating unit, or in an area close to the second bias magnetic field generating unit, etc.

[0032] In this way, since the magnetic moment of the sample can be measured by measuring the vibration of the sample and / or the sample rod, by additionally setting up a bias magnetic field generating device 24 and changing the magnetic field strength generated by the bias magnetic field generating device 24, the magnetization intensity of the sample (the sum of the magnetic moments in the region) can be measured as it changes with the magnetic field strength, thereby obtaining the hysteresis loop of the sample.

[0033] Optionally, a first through hole 25 is provided on the bias magnetic field generating device 24. The laser emitted by the laser vibrometer can pass through the first through hole 25 and irradiate the sample and / or the sample rod.

[0034] In the embodiment of the present disclosure, the first through hole 25 can be specifically arranged on the bias magnetic field generating unit close to the first laser vibrometer 22 or the second laser alignment device; or can be arranged on the bias magnetic field generating units arranged in pairs. For example, it can be arranged on the bias magnetic field generating unit of the first bias magnetic field generating device 24 close to the first laser vibrometer 22; and / or, it can be arranged on the bias magnetic field generating unit of the second bias magnetic field generating device 24 close to the second laser vibrometer 23. Figure 1 As shown, the laser beam 27 emitted by the first laser vibrometer 22 can be irradiated onto the sample and / or the sample rod from the X direction through the first through hole 25 on the first bias magnetic field generating device 24, and the laser beam 27 reflected by the sample and / or the sample rod can be irradiated back to the first laser vibrometer 22 through the first through hole 25 on the first bias magnetic field generating device 24, thereby measuring the vibration of the sample and / or the sample rod in the X direction. The laser beam 27 emitted by the second laser vibrometer 23 can be irradiated onto the sample and / or the sample rod from the Y direction through the first through hole 25 on the second bias magnetic field generating device 24, and the laser beam 27 reflected by the sample and / or the sample rod can be irradiated back to the second laser vibrometer 23 through the first through hole 25 on the second bias magnetic field generating device 24, thereby measuring the vibration of the sample and / or the sample rod in the Y direction.

[0035] In this way, by setting the first through hole 25 on the bias magnetic field generating device 24, the laser vibrometer can measure the vibration of the sample without contacting the sample, and by integrating the measuring optical path of the laser vibrometer into the first through hole 25 of the bias magnetic field generating device 24, additional equipment and complex wiring can be reduced, thereby reducing the space occupied by the overall device.

[0036] Optionally, the gradient magnetic field generating device is provided with a second through hole 26. The laser emitted by the laser vibrometer can pass through the second through hole 26 and irradiate the sample and / or the sample rod.

[0037] In the embodiment of the present disclosure, the second through hole 26 can be provided on any gradient magnetic field generating unit in any gradient magnetic field generating device. Figure 1As shown, the second through hole 26 is provided on the gradient magnetic field generating unit close to the first laser vibrometer 22. The second through hole 26 may also be provided on the two gradient magnetic field generating units provided in pairs of the first gradient magnetic field generating device 20. The second through hole 26 may also be provided on the two gradient magnetic field generating units provided in pairs of the second gradient magnetic field generating device 21, or may be provided on the gradient magnetic field generating unit of the second gradient magnetic field generating device 21 close to the second laser vibrometer 23.

[0038] In the embodiment of the present disclosure, the gradient magnetic field generating device can be arranged on the bias magnetic field generating device 24 in any manner. Specifically, the gradient magnetic field generating device can be wound around the pole of the bias magnetic field generating device 24, or a cylinder is provided to be connected to the pole of the bias magnetic field generating device 24, and a groove or hole is reserved on the cylinder to embed the gradient magnetic field generating device therein; or, the gradient magnetic field generating device can be fixed by a symmetrical bracket structure 28, etc.

[0039] In this way, by providing the second through hole 26 on the gradient magnetic field generating device, the laser vibrometer can measure the vibration of the sample without contacting the sample, and by integrating the measuring optical path of the laser vibrometer into the first through hole 25 of the bias magnetic field generating device 24 and the second through hole 26 provided on the gradient magnetic field generating device, additional equipment and complex wiring can be reduced, thereby reducing the space occupied by the overall device. In addition, by directly providing the gradient magnetic field generating device on the bias magnetic field generating device 24, additional components and connections can be reduced, making the entire device more compact and convenient for installation and maintenance.

[0040] Optionally, the vibration measurement component includes: a movable omnidirectional laser vibration measuring device; wherein the omnidirectional laser vibration measuring device can be moved to different positions to measure vibration information of the sample and / or the sample rod in gradient magnetic fields in different directions; or, a corresponding number of laser vibration measuring devices as the gradient magnetic field generating device; wherein each laser vibration measuring device is arranged correspondingly to each gradient magnetic field generating device.

[0041] In the disclosed embodiment, the vibration measurement assembly includes a movable omnidirectional laser vibrometer. By adjusting the position of the omnidirectional laser vibrometer, the omnidirectional laser vibrometer can measure the vibration information of the sample and / or the sample rod in different directions from different directions. For example, when the gradient magnetic field generating device in the X direction generates a gradient magnetic field in the X direction, the omnidirectional laser vibrometer can be moved to the X direction, and the omnidirectional laser vibrometer emits a laser beam from the X direction to the sample and / or the sample rod to measure the vibration information of the sample and / or the sample rod in the X direction; when the gradient magnetic field generating device in the Y direction generates a gradient magnetic field in the Y direction, the omnidirectional laser vibrometer can be moved to the Y direction, and the omnidirectional laser vibrometer emits a laser beam from the Y direction to the sample and / or the sample rod to measure the vibration information of the sample and / or the sample rod in the Y direction.

[0042] In the embodiment of the present disclosure, the vibration measurement component includes a number of laser vibration measuring devices corresponding to the gradient magnetic field generating device, and each laser vibration measuring device is arranged corresponding to each gradient magnetic field generating device. By starting the laser vibration measuring device in the direction corresponding to the direction of the gradient magnetic field, the vibration information of the sample and / or the sample rod in different directions is measured from different directions. For example, when the gradient magnetic field generating device in the X direction generates a gradient magnetic field in the X direction, the laser vibration measuring device in the X direction can be started to emit a laser beam from the X direction to the sample and / or the sample rod, and the vibration information of the sample and / or the sample rod in the X direction is measured; when the gradient magnetic field generating device in the Y direction generates a gradient magnetic field in the Y direction, the laser vibration measuring device in the Y direction can be started to emit a laser beam from the Y direction to the sample and / or the sample rod, and the vibration information of the sample and / or the sample rod in the Y direction is measured.

[0043] In this way, by providing a movable laser vibration measuring device or providing laser vibration measuring devices in multiple directions, it is possible to measure the vibration information of the sample and / or the sample rod in multiple directions.

[0044] Optionally, the magnetic field generating device includes a first gradient magnetic field generating device 20 and a second gradient magnetic field generating device 21. The first gradient magnetic field generating device 20 is used to generate a gradient magnetic field in a first direction. The second gradient magnetic field generating device 21 is used to generate a gradient magnetic field in a second direction. The first direction and the second direction are orthogonal.

[0045] In the embodiment of the present disclosure, the first direction is the X direction, and the second direction is the Y direction. Figure 2 As shown, the two gradient magnetic field generating units arranged in pairs by the first gradient magnetic field generating device 20 are arranged in the X direction, and the two gradient magnetic field generating units arranged in pairs by the second gradient magnetic field generating device 21 are arranged in the Y direction. In some other embodiments, the first direction and the second direction may be any two directions orthogonal to each other. For example, in addition to the first direction being the X direction and the second direction being the Y direction, the first direction may be the Y direction and the second direction may be the Z direction; or the first direction may be the X direction and the second direction may be the Z direction, etc.

[0046] In this way, by generating two gradient magnetic fields in orthogonal directions through the first gradient magnetic field generating device 20 and the second gradient magnetic field generating device 21, the sample and / or the sample rod can be vibrated in two different directions, so that the vibration of the sample and / or the sample rod in two orthogonal directions can be measured, thereby obtaining a more accurate test result.

[0047] Optionally, the vibration measurement assembly includes a first laser vibration measuring device 22 and a second laser vibration measuring device 23. The first laser vibration measuring device 22 is correspondingly arranged with the first gradient magnetic field generating device 20, and is used to detect the vibration of the sample and / or the sample rod in the first direction; the second laser vibration measuring device 23 is correspondingly arranged with the second gradient magnetic field generating device 21, and is used to detect the vibration of the sample and / or the sample rod in the second direction.

[0048] In the embodiment of the present disclosure, Figure 2 As shown, the first laser vibrometer 22 is disposed corresponding to the first gradient magnetic field generator 20, and the second laser vibrometer 23 is disposed corresponding to the second gradient magnetic field generator 21. Specifically, the first laser vibrometer 22 is disposed in the X direction, and the second laser vibrometer 23 is disposed in the Y direction.

[0049] In this way, by setting the corresponding first laser alignment device and second laser vibration measuring device 23 in two orthogonal directions, the vibration of the sample and / or the sample rod in two different directions can be measured, so that the vibration information of the sample and / or the sample rod in two orthogonal directions can be obtained, thereby obtaining more accurate test results.

[0050] Optionally, the sample holder includes a fixing device 13 and a reflecting device 14. The fixing device 13 is used to fix the sample; the reflecting device 14 is connected to the fixing device 13, and includes a reflecting surface that at least covers the target irradiation area of ​​the laser beam 27, and is used to reflect the laser beam 27 emitted by the laser vibrometer; wherein the target irradiation area includes the irradiation area of ​​the laser beam 27 emitted by at least two laser vibrometers.

[0051] In the embodiment of the present disclosure, Figure 1As shown, the sample rod includes a fixing structure 11, a rod-shaped structure 12 made of carbon fiber or a reed, and a sample holder. One end of the rod-shaped structure 12 is connected to the displacement device 10 through the fixing structure 11, and the other end is directly connected to the sample holder. The sample holder includes a fixing device 13 for fixing the sample and a reflecting device 14 for reflecting the laser beam 27. The sample can be fixed on the surface or inside of the fixing device 13 by gluing or clamping or other methods. A reflector and / or a reflective film can be provided on the surface of the reflecting device 14. Specifically, the fixing device 13 can be a polyhedron, and the sample can be fixed on any one or more faces of the polyhedron by gluing or clamping. The reflective device 14 may be a cylinder or a polyhedron, one or more reflectors may be provided, one or more reflectors may be fixed on any one or more surfaces of the polyhedron, and a reflective film may be pasted on the polyhedron or cylinder. For example, the reflective film may be pasted on part or all of the surface of the polyhedron or cylinder. By fixing the reflective mirror or reflective film on part or all of the surface of the reflective device 14, the laser beam 27 emitted by the laser vibration measuring device can be reflected back to the laser vibration measuring device from different surfaces, thereby measuring the magnetic characteristics of the sample in multiple directions without rotating the sample and / or the sample rod. If the reflective film is pasted on the entire surface of the reflective device 14, the laser beam 27 reflected in the X direction and the Y direction may be collected without rotating the sample rod, thereby measuring the vibration of the sample and / or the sample rod in the X direction and the Y direction, thereby measuring the magnetic characteristics of the sample in multiple directions.

[0052] In the embodiment of the present disclosure, a reflective surface that at least covers the target irradiation area of ​​the laser beam 27 is provided on the reflective device 14. Specifically, the target irradiation area includes the irradiation area of ​​the laser beams emitted by at least two laser vibrometers when the sample and / or the sample rod is stationary or vibrating, so as to reflect the laser beams 27 irradiated in at least two orthogonal directions, thereby measuring the vibration of the sample and / or the sample rod in at least two orthogonal directions. The reflective surface can be not only a reflective mirror and / or a reflective film, but also a surface composed of other reflective materials other than a reflective mirror and a reflective film.

[0053] In this way, by providing a fixture 13 for fixing the sample and a reflective device 14 connected to the fixture 13, the reflective device 14 can vibrate along with the vibration of the sample, so that the vibration of the reflective device 14 can characterize the vibration of the sample, and then the vibration information of the sample can be obtained by analyzing the laser beam 27 reflected by the reflective device 14. In addition, by providing a reflective surface that at least covers the target irradiation area of ​​the laser beam 27, the laser beam 27 emitted by the laser vibrometer in multiple directions can be reflected, so that the vibration of the sample and / or the sample rod in multiple directions can be measured, thereby improving the accuracy of the test.

[0054] Optionally, the high-precision magnetic measurement device further comprises a displacement device 10. One end of the displacement device 10 is connected to the sample rod, and the other end is connected to the control device.

[0055] In the disclosed embodiment, the control device is connected to the data processing device, and the control device can control the displacement device 10 according to the processing result of the data processing device to cause the sample rod to move.

[0056] In the disclosed embodiment, the displacement device 10 may be a device capable of driving the sample rod to displace in any direction, such as a three-axis displacement stage (X, Y and Z axes) or a four-axis displacement stage (X, Y, Z and rotation axes).

[0057] In this way, by precisely controlling the displacement device 10 through the control device, the position of the sample rod can be precisely adjusted so that the sample rod can move in different directions, thereby increasing the flexibility of the measurement and allowing magnetic measurements of the sample at multiple angles and multiple positions.

[0058] Optionally, the high-precision magnetic measurement device further includes a processor, which is electrically connected to the above-mentioned electrical components and is used to control the above-mentioned electrical components to perform actions.

[0059] Figure 4 Schematic diagram of a method for controlling a high-precision magnetic measurement device provided in an embodiment of the present disclosure. Any of the following methods can be executed in the high-precision magnetic measurement device, or in a server or terminal device that is connected to the high-precision magnetic measurement device for communication. In the embodiment of the present disclosure, the scheme is described with the high-precision magnetic measurement device as the execution subject.

[0060] Based on the structure of the above-mentioned high-precision magnetic measurement device, such as Figure 4 As shown, the embodiment of the present disclosure also discloses a method for controlling a high-precision magnetic measurement device, including: S41, in response to a control instruction to measure magnetic characteristics in a target direction, the high-precision magnetic measurement device starts a gradient magnetic field generating device corresponding to the target direction.

[0061] S42, when the preset measurement conditions are met, the high-precision magnetic measurement device obtains target vibration information of the sample and / or the sample rod in the target direction.

[0062] S43, the high-precision magnetic measurement device obtains the magnetic characteristics of the sample in the target direction according to the target vibration information of the sample and / or the sample rod in the target direction.

[0063] In the disclosed embodiment, the target direction may be a single direction or multiple directions. When the target direction is a single direction, the high-precision magnetic measurement device may asynchronously measure the magnetic characteristics of the sample in multiple directions. When the target direction is multiple directions, the high-precision magnetic measurement device may synchronously measure the magnetic characteristics of the sample in multiple directions by setting multiple laser vibrometers.

[0064] In the disclosed embodiment, when the target direction is the first direction (such as the X direction), the first gradient magnetic field generating device is activated; when the target direction is the second direction (such as the Y direction), the second gradient magnetic field generating device is activated; when the target direction is the third direction (such as the Z direction), the third gradient magnetic field generating device is activated. The first direction, the second direction and the third direction are orthogonal to each other.

[0065] In the embodiment of the present disclosure, the preset measurement conditions include a first measurement condition that the sample and / or the sample rod need to satisfy, a second measurement condition that the gradient magnetic field generating device needs to satisfy, a third measurement condition that the laser vibrometer needs to satisfy, and / or a fourth measurement condition that the bias magnetic field generating device needs to satisfy. Any one or more of the first measurement condition, the second measurement condition, the third measurement condition, and the fourth measurement condition can be preset, or can be determined in real time according to specific measurement requirements.

[0066] The method for controlling a high-precision magnetic measurement device provided by the embodiment of the present disclosure is adopted. In response to a control instruction for measuring magnetic characteristics in a target direction, a gradient magnetic field generating device corresponding to the target direction is started. When a preset measurement condition is met, target vibration information of the sample and / or the sample rod in the target direction is obtained, and the magnetic characteristics of the sample in the target direction are obtained based on the target vibration information of the sample and / or the sample rod in the target direction. By setting at least two gradient magnetic field generating devices in different directions, a torque can be applied to the sample from different directions without rotating the sample and / or the sample rod, so that vibration information of the sample in different target directions can be obtained, and the magnetic characteristics of the sample in two orthogonal directions can be measured, thereby improving the accuracy of the test.

[0067] Optionally, the preset measurement condition includes: the amplitude of the sample and / or the sample rod is within a target range, wherein the minimum value of the target range is the maximum amplitude of the sample and / or the sample rod minus the preset value, and the maximum value of the target range is the maximum amplitude of the sample and / or the sample rod.

[0068] In the disclosed embodiment, the preset value refers to the error that may occur during the measurement process, such as the difference between the actual value and the theoretical value. It can be determined according to user settings or by a large model based on historical data.

[0069] In the disclosed embodiments, the amplitude of the sample and / or the sample rod is within a target range, including a minimum value and a maximum value of the target range.

[0070] Thus, when the amplitude of the sample and / or the sample rod is within the target range, the vibration of the sample and / or the sample rod reaches the maximum amplitude, indicating that the sample and / or the sample rod has entered a stable vibration mode. When the vibration of the sample and / or the sample rod tends to be stable, the high-precision magnetic measurement device can more easily control the variables generated by external environmental factors (such as mechanical vibration, electromagnetic interference, etc.), making the measured vibration information more reliable, thereby ensuring that the influence of external environmental factors is minimized during the measurement process and avoiding errors caused by different initial conditions.

[0071] Optionally, the high-precision magnetic measurement device obtains the amplitude of the sample and / or the sample rod, including: the high-precision magnetic measurement device starts the laser vibration measurement device, and moves the laser vibration measurement device to a measurement area corresponding to the target direction to measure the amplitude of the sample and / or the sample rod.

[0072] In the embodiment of the present disclosure, the high-precision magnetic measurement device may be provided with at least one movable laser vibration measuring device. For example, a movable laser vibration measuring device is provided, and the vibration information of the sample and / or the sample rod under the action of the gradient magnetic field in different directions is measured by moving the laser vibration measuring device to the measurement area corresponding to the gradient magnetic field generating device in different directions; or two movable laser vibration measuring devices are provided, and the vibration information of the sample and / or the sample rod under the action of the gradient magnetic field in different directions can be measured asynchronously or synchronously by moving the two laser vibration measuring devices to the measurement areas corresponding to the gradient magnetic field generating devices in different directions respectively.

[0073] In this way, the high-precision magnetic measuring device starts the laser vibrometer and moves the laser vibrometer to a measurement area corresponding to the target direction. Only a number of movable laser vibrometers, which is less than the number of gradient magnetic field generating devices, is needed to measure the vibration information of the sample and / or sample rod in different directions, thereby saving the cost of testing and measurement.

[0074] Optionally, the high-precision magnetic measurement device obtains the amplitude of the sample and / or the sample rod, including: the high-precision magnetic measurement device starts a laser vibration measurement device corresponding to the gradient magnetic field generating device corresponding to the target direction to measure the amplitude of the sample and / or the sample rod.

[0075] In the embodiment of the present disclosure, the preset measurement conditions also include: turning off the gradient magnetic field generating device, the laser vibration measuring device and / or the bias magnetic field generating device except for the target direction, which not only reduces energy consumption but also avoids mutual influence.

[0076] In the embodiment of the present disclosure, the high-precision magnetic measurement device includes a laser vibrometer device corresponding to at least two gradient magnetic field generating devices, wherein the number of the laser vibrometer devices may be the same as the number of the gradient magnetic field generating devices, or may be less than the number of the gradient magnetic field generating devices. For example, when the high-precision magnetic measurement device is provided with a gradient magnetic field generating device in the X direction, the Y direction, and the Z direction, respectively, a laser vibrometer device corresponding to the gradient magnetic field generating device may be provided in the X direction, the Y direction, and the Z direction, respectively, or a laser vibrometer device corresponding to the gradient magnetic field generating device may be provided in the X direction and the Y direction, respectively.

[0077] In this way, the high-precision magnetic measurement device activates the laser vibration measuring device corresponding to the gradient magnetic field generating device corresponding to the target direction, and the vibration information of the sample and / or sample rod in different directions can be measured without moving the laser vibration measuring device, thereby improving the test and measurement efficiency.

[0078] Optionally, after the high-precision magnetic measurement device responds to the control instruction to measure the magnetic characteristics of the target direction, the high-precision magnetic measurement device further includes: the high-precision magnetic measurement device starts the bias magnetic field generating device.

[0079] In the embodiment of the present disclosure, the high-precision magnetic measurement device starts the bias magnetic field generating device, including: when there is one bias magnetic field generating device, the high-precision magnetic measurement device directly starts the bias magnetic field generating device; when there are multiple bias magnetic field generating devices, the high-precision magnetic measurement device starts some or all of the bias magnetic field generating devices, such as the high-precision magnetic measurement device starts the bias magnetic field generating device corresponding to the target direction, or the high-precision magnetic measurement device directly starts all the bias magnetic field generating devices.

[0080] In this way, since the magnetic moment of the sample can be measured by measuring the vibration of the sample and / or the sample rod, by additionally setting up a bias magnetic field generating device and changing the magnetic field strength generated by the bias magnetic field generating device, the magnetization intensity of the sample (the sum of the magnetic moments in the region) can be measured as it changes with the magnetic field strength, thereby obtaining the hysteresis loop of the sample.

[0081] Optionally, the preset measurement condition also includes: an angle between the sample and the bias magnetic field reaches a set angle.

[0082] In this way, when the sample is magnetized, a demagnetization field will be generated at both ends of the sample. The direction of the demagnetization field is opposite to the magnetization direction, which will affect the accuracy of the measurement results. By placing the sample at a certain angle to the bias magnetic field, the component of the demagnetization field in the measurement direction can be reduced, thereby reducing the interference of the demagnetization field on the measurement results and improving the accuracy of the measurement.

[0083] Optionally, the high-precision magnetic measurement device makes the angle between the sample and the bias magnetic field reach a set angle in the following method: the high-precision magnetic measurement device controls the position of the sample rod through a displacement device until the angle between the sample and the bias magnetic field reaches the set angle.

[0084] In this way, the high-precision magnetic measurement device controls the posture, ie, the position and attitude, of the sample rod through the displacement device, so that the angle between the sample and the bias magnetic field can reach a set angle.

[0085] Optionally, the high-precision magnetic measurement device obtains target vibration information of the sample and / or the sample rod in the target direction, including: the high-precision magnetic measurement device changes the magnitude of the magnetic field strength of the bias magnetic field, and obtains vibration information of the sample and / or the sample rod during the change of the magnetic field strength of the bias magnetic field.

[0086] Thus, when the bias magnetic field is started, the sample vibration can be changed by changing the magnitude of the bias magnetic field strength, thereby changing the magnetic moment of the sample. The magnetization intensity of the sample can then be measured as the strength of the magnetic field changes, and the hysteresis loop of the sample can be obtained.

[0087] Combination Figure 5 As shown, an embodiment of the present disclosure provides a device 800 for controlling a high-precision magnetic measurement device, including a processor 801 and a memory 802. Optionally, the device may also include a communication interface 803 and a bus 804. The processor 801, the communication interface 803, and the memory 802 may communicate with each other through the bus 804. The communication interface 803 may be used for information transmission. The processor 801 may call the logic instructions in the memory 802 to execute the method for controlling the high-precision magnetic measurement device of the above embodiment.

[0088] In addition, the logic instructions in the memory 802 described above may be implemented in the form of software functional units and when sold or used as independent products, may be stored in a computer-readable storage medium.

[0089] The memory 802 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 801 executes the function application and data processing by running the program instructions / modules stored in the memory 802, that is, the method for controlling the high-precision magnetic measurement device in the above embodiment is realized.

[0090] The memory 802 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 802 may include a high-speed random access memory and may also include a non-volatile memory.

[0091] The disclosed embodiment provides a high-precision magnetic measuring device, including: a high-precision magnetic measuring device body, and the above-mentioned device 800 for controlling the high-precision magnetic measuring device. The device 800 for controlling the high-precision magnetic measuring device is installed in the high-precision magnetic measuring device body. The installation relationship described here is not limited to being placed inside the high-precision magnetic measuring device, but also includes installation connections with other components of the high-precision magnetic measuring device, including but not limited to physical connections, electrical connections, or signal transmission connections. It can be understood by those skilled in the art that the device 800 for controlling the high-precision magnetic measuring device can be adapted to a feasible high-precision magnetic measuring device body, thereby realizing other feasible embodiments.

[0092] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling a high-precision magnetic measurement device.

[0093] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiment of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0094] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible changes. Unless explicitly required, separate components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates, the singular forms of "a", "an" and "the" are intended to include plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variants "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method or device including the elements. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the embodiments may refer to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can refer to the description of the method part.

[0095] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods for each specific application to implement the described functions, but such implementations should not be considered to exceed the scope of the embodiments of the present disclosure. The technicians may clearly understand that, for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above may refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0096] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units can be only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between each other shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiment of the present disclosure may be integrated in a processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit.

[0097] The flowchart and block diagram in the accompanying drawings show the possible architecture, function and operation of the system, method and computer program product according to the embodiment of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowchart and the block diagram in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in a different order from the order disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling a high-precision magnetic measuring device, characterized in that: The high-precision magnetic measurement device comprises a sample rod for fixing a sample and at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; the method comprises: In response to a control instruction for measuring magnetic characteristics in a target direction, a gradient magnetic field generating device corresponding to the target direction is started; When the preset measurement conditions are met, target vibration information of the sample and / or the sample rod in the target direction is obtained; According to the target vibration information of the sample and / or the sample rod in the target direction, the magnetic characteristics of the sample in the target direction are obtained.

2. The method according to claim 1, characterized in that The preset measurement conditions include: The amplitude of the sample and / or the sample rod is within the target range; The minimum value of the target range is the maximum amplitude of the sample and / or the sample rod minus the preset value, and the maximum value of the target range is the maximum amplitude of the sample and / or the sample rod.

3. The method according to claim 2, characterized in that The high-precision magnetic measurement device further comprises at least one movable laser vibration measuring device; obtaining the amplitude of the sample and / or the sample rod comprises: Start the laser vibrometer and move it to a measurement area corresponding to the target direction to measure the amplitude of the sample and / or the sample rod.

4. The method according to claim 2, characterized in that: The high-precision magnetic measurement device also includes a laser vibration measurement device arranged corresponding to at least two gradient magnetic field generating devices; Acquire the amplitude of the sample and / or the probe, including: A laser vibration measuring device corresponding to the gradient magnetic field generating device corresponding to the target direction is started to measure the amplitude of the sample and / or the sample rod.

5. The method according to any one of claims 1 to 4, characterized in that The high-precision magnetic measurement device also includes a bias magnetic field generating device; In response to the control instruction of measuring the magnetic characteristics in the target direction, the method further includes: Start the bias magnetic field generating device.

6. The method according to claim 5, characterized in that The preset measurement conditions also include: The angle between the sample and the bias magnetic field reaches the set angle.

7. The method according to claim 6, characterized in that The high-precision magnetic measurement device also includes a displacement device connected to the sample rod; the angle between the sample and the bias magnetic field is made to reach a set angle according to the following method: The position of the sample rod is controlled by a displacement device until the angle between the sample and the bias magnetic field reaches a set angle.

8. The method according to claim 5, characterized in that Obtain targeted vibration information of the sample and / or sample holder in a targeted direction, including: The magnitude of the magnetic field strength of the bias magnetic field is changed, and vibration information of the sample and / or the sample rod during the change of the magnetic field strength of the bias magnetic field is obtained.

9. A device for controlling a high-precision magnetic measuring device, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling a high-precision magnetic measurement device according to any one of claims 1 to 8 when running the program instructions.

10. A high-precision magnetic measurement device, characterized in that: include: The high-precision magnetic measurement device body includes a sample rod for fixing the sample and at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; as well as, The device for controlling a high-precision magnetic measuring device according to claim 9 is mounted on a main body of the high-precision magnetic measuring device.

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