High-precision magnetic measuring device

Abstract

The utility model relates to the technical field of testing and measuring, and discloses a high-precision magnetic measuring device which comprises a sample rod, a magnetic field generating device and a vibration measuring assembly. The sample rod comprises a sample seat for fixing a sample; the magnetic field generating devices comprise at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; the sample is located in an action area of gradient magnetic fields in different directions; the vibration measurement assembly comprises at least one laser vibration measurement device and is used for acquiring vibration information of the sample and / or the sample rod in gradient magnetic fields in different directions. By arranging at least two gradient magnetic field generating devices in different directions and at least one laser vibration measuring device capable of measuring vibration information in different directions, magnetic characteristics in multiple directions can be measured without rotating a sample and / or a sample rod, and the testing precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test measurement, for example to a high-precision magnetic measurement device. BACKGROUND

[0002] At present, the existing magnetic measurement method is limited by the design of the equipment and the simplicity of the operation, and can only measure the vibration information of a direction of the sample. However, some magnetic materials may exhibit higher magnetic permeability or lower coercivity in a specific direction, and may be completely different in other directions. The magnetization characteristics of the magnetic material may be significantly different in different directions. Single-direction measurement cannot provide sufficient data to accurately describe the magnetization process of the sample, so that the prior art may have insufficient testing accuracy.

[0003] In order to overcome the above limitations, the related art realizes the vibration measurement of 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, so as to provide 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 at least the following problems exist in the related art:

[0005] The measurement method of the related art rotates the sample to obtain the magnetic characteristics in different directions, which improves the accuracy of the test to some extent. However, rotating the sample changes the angle of the sample, and the magnetic characteristics measured before and after rotating the sample are the magnetic characteristics of the sample at different angles. Therefore, the related art still measures in a single direction at the same angle, resulting in low accuracy of the test results.

[0006] The above information disclosed in the background section is only intended to enhance the understanding of the background of the present application, and therefore can contain information that is not prior art known to those of ordinary skill in the art. SUMMARY

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important components or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide a high-precision magnetic measurement device to realize the measurement of the magnetic characteristics of the sample in different directions without rotating the sample, thereby improving the accuracy of the magnetic measurement.

[0009] In some embodiments, the high-precision magnetic measurement device comprises: a sample rod comprising a sample seat for fixing a sample; a magnetic field generating device comprising at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; wherein the sample is located in the action region of the gradient magnetic fields in different directions; and a vibration measurement assembly comprising at least one laser vibration measurement device for obtaining vibration information of the sample and / or the sample rod.

[0010] Optionally, the magnetic field generating device further comprises: at least one bias magnetic field generating device for generating a bias magnetic field; wherein the sample is located in the action region of the bias magnetic field.

[0011] Optionally, a first through hole is arranged on the bias magnetic field generating device, and the laser emitted by the laser vibration measurement device can pass through the first through hole to irradiate the sample and / or the sample rod.

[0012] Optionally, a second through hole is arranged on the gradient magnetic field generating device, and the laser emitted by the laser vibration measurement device can pass through the second through hole to irradiate the sample and / or the sample rod.

[0013] Optionally, the vibration measurement assembly comprises: a movable omnidirectional laser vibration measurement device; wherein the omnidirectional laser vibration measurement device is movable to different positions to measure the vibration information of the sample and / or the sample rod in the gradient magnetic fields in different directions.

[0014] Optionally, the vibration measurement assembly comprises: a corresponding number of laser vibration measurement devices corresponding to the gradient magnetic field generating devices; wherein each laser vibration measurement device is arranged corresponding to each gradient magnetic field generating device.

[0015] Optionally, the magnetic field generating device comprises: a first gradient magnetic field generating device for generating a gradient magnetic field in a first direction; and a second gradient magnetic field generating device for generating a gradient magnetic field in a second direction; wherein the first direction and the second direction are orthogonal.

[0016] Optionally, the vibration measurement assembly comprises: a first laser vibration measurement device arranged corresponding to the first gradient magnetic field generating device for detecting the vibration of the sample and / or the sample rod in the first direction; and a second laser vibration measurement device arranged corresponding to the second gradient magnetic field generating device for detecting the vibration of the sample and / or the sample rod in the second direction.

[0017] Optionally, the sample seat comprises: a fixing device for fixing the sample; and a light-reflecting device connected to the fixing device, comprising at least a light-reflecting surface covering a target irradiation region of a laser beam, for reflecting the laser beam emitted by the laser vibration measurement device; wherein the target irradiation region comprises at least two irradiation regions of the laser beams emitted by the laser vibration measurement devices.

[0018] Optionally, the high-precision magnetic measurement device further comprises: a displacement device connected to the sample rod.

[0019] The high-precision magnetic measurement device provided by the embodiments of the present disclosure can achieve the following technical effects.

[0020] The high-precision magnetic measurement device comprises a sample rod, a magnetic field generating device and a vibration measurement assembly. The sample rod comprises a sample seat for fixing a sample. The magnetic field generating device comprises at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions, and the sample is located in the action region of the gradient magnetic fields in different directions. The vibration measurement assembly comprises at least one laser vibration measurement device for obtaining vibration information of the sample and / or the sample rod. By arranging at least two gradient magnetic field generating devices in different directions and at least one laser vibration measurement device capable of measuring vibration information in different directions, vibration information of the sample in orthogonal directions can be obtained without rotating the sample and / or the sample rod, so that the magnetic characteristics of the sample in two orthogonal directions are measured, and the testing precision is improved.

[0021] The foregoing general description and the following description are merely exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitation on the embodiments, elements with the same reference numerals in the drawings are shown as similar elements, the drawings do not constitute proportional limitation, and wherein:

[0023] Figure 1 is a partial front view structural schematic diagram of a high-precision magnetic measurement device provided by the embodiments of the present disclosure;

[0024] Figure 2 is a partial top view structural schematic diagram of a high-precision magnetic measurement device provided by the embodiments of the present disclosure;

[0025] Figure 3 is a mounting structure schematic diagram of a second gradient magnetic field generating device provided by the embodiments of the present disclosure.

[0026] LIST OF REFERENCE NUMERALS

[0027] 10: displacement device; 11: fixing structure; 12: rod-shaped structure; 13: fixing device; 14: reflecting device; 20: first gradient magnetic field generating device; 21: second gradient magnetic field generating device; 22: first laser vibration measurement device; 23: second laser vibration measurement device; 24: bias magnetic field generating device; 25: first through hole; 26: second through hole; 27: laser beam; 28: support structure; 29: first gradient magnetic field generating unit; 30: second gradient magnetic field generating unit. DETAILED DESCRIPTION

[0028] In order to enable more detailed understanding of the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure is described in detail below, and the attached drawings are used for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0029] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0030] In combination with Figures 1 to 3 the drawings, the embodiments of the present disclosure provide a high-precision magnetic measurement device, which includes a sample rod, a magnetic field generating device, a vibration measurement assembly and a data processing device. The sample rod includes a sample seat for fixing a 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 assembly includes at least one laser vibration measurement device for obtaining vibration information of the sample and / or the sample rod. The data processing device is connected with the vibration measurement assembly, and is used for analyzing the vibration information of the sample and / or the sample rod.

[0031] In the embodiments of the present disclosure, the magnetic field generating device includes at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions, such as Figure 2 as shown in the drawings, one gradient magnetic field generating device is arranged in the X and Y directions, i.e. Figure 2 the first gradient magnetic field generating device 20 and the second gradient magnetic field generating device 21 in the drawings; or, one gradient magnetic field generating device is arranged 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.

[0032] In the embodiments of the present disclosure, the gradient magnetic field generating device can be any device capable of generating a gradient magnetic field, such as a gradient coil, a device composed of a gradient coil wound on a solid object, and / or other devices composed of a gradient coil, etc. 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 arranged at any position between the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30, which can be arranged according to the measurement requirements. Specifically, the sample can be arranged at the middle of the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30, or close to the first gradient magnetic field generating unit 29, or close to the second gradient magnetic field generating unit 30, etc. In this way, the magnetic field lines are emitted from one gradient magnetic field generating unit, pass through the sample area, and then enter the other gradient magnetic field generating unit. In the middle area between the two gradient magnetic field generating units, the rate of change of the magnetic field (i.e., the gradient) is the highest. By arranging 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.

[0033] In the embodiments of the present disclosure, the vibration measurement assembly includes at least one laser vibration measurement device arranged corresponding to the gradient magnetic field generating device. For example, the vibration measurement assembly can include at least one movable laser vibration measurement device to measure the vibration information of the sample and / or the sample rod under the action of the gradient magnetic field in different directions by moving to different positions. The vibration measurement assembly can also include at least two laser vibration measurement devices arranged corresponding to the gradient magnetic field generating device in different directions, such as Figure 2 As shown in FIG. 2, the gradient magnetic field generating device in the X and Y directions is respectively provided with a first laser vibration measurement device 22 in the X direction and a second laser vibration measurement device 23 in the Y direction; or the gradient magnetic field generating device in the X, Y and Z directions is respectively provided with a first laser vibration measurement device 22 in the X direction, a second laser vibration measurement device 23 in the Y direction, and a third laser vibration measurement device in the Z direction, etc. Specifically, the number of laser vibration measurement devices can be arranged according to the test requirements. The laser vibration measurement device can be a laser Doppler vibration measurement instrument. The laser beam 27 emitted by the laser Doppler vibration measurement instrument is irradiated on the sample and / or the sample rod, and then the reflected laser beam 27 of the sample and / or the sample rod is received by the laser Doppler vibration measurement instrument, and the vibration of the sample and / or the sample rod is extracted by measuring the Doppler frequency shift of the reflected laser beam 27.

[0034] The high-precision magnetic measurement device comprises a sample rod, a magnetic field generating device, a vibration measurement assembly and a data processing device. The sample rod comprises a sample seat for fixing a sample. The magnetic field generating device comprises at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions, and the sample is located in the action region of the gradient magnetic fields in different directions. The vibration measurement assembly comprises at least one laser vibration measurement device for obtaining vibration information of the sample and / or the sample rod in the gradient magnetic fields in different directions. The data processing device is connected with the vibration measurement assembly and is used for analyzing the vibration information of the sample and / or the sample rod. By arranging at least two gradient magnetic field generating devices in different directions and at least one laser vibration measurement device capable of measuring vibration information in different directions, vibration information of the sample in orthogonal directions can be obtained without rotating the sample and / or the sample rod, so that the measurement of the magnetic characteristics of the sample in two orthogonal directions improves the testing precision.

[0035] Optionally, the magnetic field generating device comprises at least one bias magnetic field generating device 24. The at least one bias magnetic field generating device 24 is used for generating a bias magnetic field; and the sample is located in the action region of the bias magnetic field.

[0036] In the embodiments of the present disclosure, the magnetic field generating device further comprises at least one bias magnetic field generating device 24, for example, as shown in Figure 1 and Figure 2 one bias magnetic field generating device 24 is arranged in the X direction; or one bias magnetic field generating device 24 is arranged in the Y direction; or one bias magnetic field generating device 24 is arranged in the X direction and one bias magnetic field generating device 24 is arranged in the Y direction, respectively. Specifically, the number of bias magnetic field generating devices 24 can be arranged according to the testing requirements.

[0037] In the embodiments of the present disclosure, the bias magnetic field generating device 24 comprises a first bias magnetic field generating unit and a second bias magnetic field generating unit arranged in pairs. 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, the second bias magnetic field generating unit is an electromagnet; or the first bias magnetic field generating unit is an electromagnetic coil, the second bias magnetic field generating unit is an electromagnetic coil; or the first bias magnetic field generating unit is an electromagnet, the second bias magnetic field generating unit is an electromagnetic coil; or the first bias magnetic field generating unit is an electromagnetic coil, 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, which can be arranged according to the measurement requirements. Specifically, the sample can be arranged at the middle part of the first bias magnetic field generating unit and the second bias magnetic field generating unit, or close to the first bias magnetic field generating unit, or close to the second bias magnetic field generating unit, etc.

[0038] Thus, since the magnetic moment of the sample can be measured by measuring the vibration of the sample and / or the sample rod, by additionally providing the bias magnetic field generating device 24 and changing the magnetic field strength generated by the bias magnetic field generating device 24, the magnetization of the sample (the total of the magnetic moments in the region) that can be measured with respect to the magnetic field strength can be obtained, and thus the magnetic hysteresis loop of the sample can be obtained.

[0039] Optionally, a first through hole 25 is provided on the bias magnetic field generating device 24. The laser emitted by the laser vibration measuring device can pass through the first through hole 25 and irradiate the sample and / or the sample rod.

[0040] In the embodiments of the present disclosure, the first through hole 25 can be provided on the bias magnetic field generating unit close to the first laser vibration measuring device 22 or the second laser vibration measuring device, or can be provided on the bias magnetic field generating unit of the pair of bias magnetic field generating devices. For example, the first through hole 25 can be provided on the bias magnetic field generating unit of the first bias magnetic field generating device 24 close to the first laser vibration measuring device 22, and / or the first through hole 25 can be provided on the bias magnetic field generating unit of the second bias magnetic field generating device 24 close to the second laser vibration measuring device 23. Figure 1 As shown in the figure, the laser beam 27 emitted by the first laser vibration measuring device 22 can pass through the first through hole 25 on the first bias magnetic field generating device 24 and irradiate the sample and / or the sample rod from the X direction, and the laser beam 27 reflected by the sample and / or the sample rod can pass through the first through hole 25 on the first bias magnetic field generating device 24 again and irradiate the first laser vibration measuring device 22, thereby achieving the measurement of the vibration of the sample and / or the sample rod in the X direction. The laser beam 27 emitted by the second laser vibration measuring device 23 can pass through the first through hole 25 on the second bias magnetic field generating device 24 and irradiate the sample and / or the sample rod from the Y direction, and the laser beam 27 reflected by the sample and / or the sample rod can pass through the first through hole 25 on the second bias magnetic field generating device 24 again and irradiate the second laser vibration measuring device 23, thereby achieving the measurement of the vibration of the sample and / or the sample rod in the Y direction.

[0041] Thus, by providing the first through hole 25 on the bias magnetic field generating device 24, the laser vibration measuring device can measure the vibration of the sample without contacting the sample, and by integrating the measurement light path of the laser vibration measuring device into the first through hole 25 of the bias magnetic field generating device 24, the additional equipment and complex wiring can be reduced, thereby reducing the space occupation of the overall equipment.

[0042] Optionally, a second through hole 26 is provided on the gradient magnetic field generating device. The laser emitted by the laser vibration measuring device can pass through the second through hole 26 and irradiate the sample and / or the sample rod.

[0043] In the embodiments of the present disclosure, the second through hole 26 can be provided on any one of the gradient magnetic field generating units of any one of the gradient magnetic field generating devices. For example, the second through hole 26 can be provided on the gradient magnetic field generating unit of the first gradient magnetic field generating device 21, and / or the second through hole 26 can be provided on the gradient magnetic field generating unit of the second gradient magnetic field generating device 22. Figure 1As shown, the second through hole 26 is arranged on the gradient magnetic field generating unit close to the first laser vibration measuring device 22. The second through hole 26 can also be arranged on the two gradient magnetic field generating units arranged in pairs of the first gradient magnetic field generating device 20. The second through hole 26 can also be arranged on the two gradient magnetic field generating units arranged in pairs of the second gradient magnetic field generating device 21, or on the gradient magnetic field generating unit of the second gradient magnetic field generating device 21 close to the second laser vibration measuring device 23.

[0044] In the embodiments 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 on the pole head of the bias magnetic field generating device 24, or a cylinder is arranged to be connected with the pole head of the bias magnetic field generating device 24, and a groove or a hole is reserved on the cylinder, and the gradient magnetic field generating device is embedded in the groove or the hole; or the gradient magnetic field generating device is fixed by a symmetrical support structure 28, etc.

[0045] In this way, by arranging the second through hole 26 on the gradient magnetic field generating device, the laser vibration measuring device can measure the vibration of the sample without contacting the sample, and by integrating the measurement light path of the laser vibration measuring device into the first through hole 25 of the bias magnetic field generating device 24 and the second through hole 26 arranged on the gradient magnetic field generating device, the additional equipment and complex wiring can be reduced, thereby reducing the space occupation of the overall equipment. In addition, by arranging the gradient magnetic field generating device directly on the bias magnetic field generating device 24, the additional components and connections can be reduced, so that the whole device is more compact, and is convenient for installation and maintenance.

[0046] Optionally, the vibration measuring assembly comprises: a movable omnidirectional laser vibration measuring device; wherein the omnidirectional laser vibration measuring device is movable to different positions to measure the vibration information of the sample and / or the sample rod in different direction gradient magnetic fields; or a corresponding number of laser vibration measuring devices corresponding to the gradient magnetic field generating device; wherein each laser vibration measuring device is arranged corresponding to each gradient magnetic field generating device.

[0047] In the embodiments of the present disclosure, the vibration measuring assembly comprises a movable omnidirectional laser vibration measuring device. By adjusting the position of the omnidirectional laser vibration measuring device, the omnidirectional laser vibration measuring device can measure the vibration information of the sample and / or the sample rod in different directions from different directions. For example, when the X-direction gradient magnetic field generating device generates the X-direction gradient magnetic field, the omnidirectional laser vibration measuring device can be moved to the X-direction, and the omnidirectional laser vibration measuring device 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 Y-direction gradient magnetic field generating device generates the Y-direction gradient magnetic field, the omnidirectional laser vibration measuring device can be moved to the Y-direction, and the omnidirectional laser vibration measuring device 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.

[0048] In the embodiments of the present disclosure, the vibration measurement assembly includes a number of laser vibration measurement devices corresponding to the gradient magnetic field generating devices, and each laser vibration measurement device is arranged corresponding to each gradient magnetic field generating device. By starting the laser vibration measurement 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. For example, when the X-direction gradient magnetic field generating device generates the X-direction gradient magnetic field, the X-direction laser vibration measurement device can be started to emit a laser beam on the sample and / or the sample rod from the X-direction to measure the vibration information of the sample and / or the sample rod in the X-direction; when the Y-direction gradient magnetic field generating device generates the Y-direction gradient magnetic field, the Y-direction laser vibration measurement device can be started to emit a laser beam on the sample and / or the sample rod from the Y-direction to measure the vibration information of the sample and / or the sample rod in the Y-direction.

[0049] In this way, by arranging one movable laser vibration measurement device or arranging laser vibration measurement devices in multiple directions, the vibration information of the sample and / or the sample rod in multiple directions can be measured.

[0050] 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 configured to generate a gradient magnetic field in a first direction. The second gradient magnetic field generating device 21 is configured to generate a gradient magnetic field in a second direction. The first direction and the second direction are orthogonal.

[0051] In the embodiments of the present disclosure, the first direction is the X-direction, and the second direction is the Y-direction. As shown in FIG. 1, the two gradient magnetic field generating units of the first gradient magnetic field generating device 20 arranged in pairs are arranged in the X-direction, and the two gradient magnetic field generating units of the second gradient magnetic field generating device 21 arranged in pairs are arranged in the Y-direction. In other embodiments, the first direction and the second direction can 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 can be the Y-direction and the second direction can be the Z-direction; or the first direction can be the X-direction and the second direction can be the Z-direction, and so on. Figure 2

[0052] In this way, by generating gradient magnetic fields in two 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 vibrate in two different directions, so that the vibration of the sample and / or the sample rod in two orthogonal directions can be measured, and more accurate test results can be obtained.

[0053] ​Optionally, the vibration measurement assembly comprises a first laser vibration measurement device 22 and a second laser vibration measurement device 23. The first laser vibration measurement device 22 is arranged corresponding to the first gradient magnetic field generating device 20, and is configured to detect the vibration of the sample and / or the sample rod in the first direction; the second laser vibration measurement device 23 is arranged corresponding to the second gradient magnetic field generating device 21, and is configured to detect the vibration of the sample and / or the sample rod in the second direction.

[0054] In the embodiments of the present disclosure, in combination with Figure 2 As shown in the figure, the first laser vibration measurement device 22 is arranged corresponding to the first gradient magnetic field generating device 20, and the second laser vibration measurement device 23 is arranged corresponding to the second gradient magnetic field generating device 21. Specifically, the first laser vibration measurement device 22 is arranged in the X direction, and the second laser vibration measurement device 23 is arranged in the Y direction.

[0055] In this way, by arranging the corresponding first laser vibration measurement device and the second laser vibration measurement 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, and a more accurate test result can be obtained.

[0056] Optionally, the sample seat comprises a fixing device 13 and a light reflection device 14. The fixing device 13 is configured to fix the sample; the light reflection device 14 is connected with the fixing device 13, and comprises a light reflection surface covering at least a target irradiation area of the laser beam 27, and is configured to reflect the laser beam 27 emitted by the laser vibration measurement device; wherein the target irradiation area comprises irradiation areas of laser beams 27 emitted by at least two laser vibration measurement devices.

[0057] In the embodiments of the present disclosure, in combination with Figure 1As shown, the sample rod includes a fixing structure 11, a rod-shaped structure 12 made of carbon fiber or spring, 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 reflective 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, clamping, or other means. The surface of the reflective device 14 can be provided with a reflective mirror and / or a reflective film. 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 can be a cylinder or a polyhedron. One or more reflective mirrors can be provided, and one or more reflective mirrors can be fixed to any one or more surfaces of the polyhedron. Reflective film can be attached to the polyhedron or cylinder. For example, the reflective film can be attached to part or all of the surface of the polyhedron or cylinder. By attaching the reflective mirrors or reflective film to part or all of the surface of the reflective device 14, the laser beam 27 emitted by the laser vibrometer can be reflected back to the laser vibrometer from different surfaces, thereby enabling measurement of the magnetic characteristics of the sample in multiple directions without rotating the sample and / or sample holder. If the reflective film is attached to the entire surface of the reflective device 14, the laser beam 27 reflected in the X and Y directions can be collected without rotating the sample holder, thereby measuring the vibration of the sample and / or sample holder in the X and Y directions, thereby enabling measurement of the magnetic characteristics of the sample in multiple directions.

[0058] In the disclosed embodiment, the reflective device 14 is provided with a reflective surface that covers at least the target illumination area of ​​the laser beam 27. Specifically, the target illumination area includes the illumination area of ​​the laser beams emitted by at least two laser vibrometers when the sample and / or sample holder is stationary or vibrating. This surface reflects the laser beams 27 irradiated in at least two orthogonal directions, thereby enabling measurement of the vibration of the sample and / or sample holder in at least two orthogonal directions. The reflective surface can be not only a reflective mirror and / or reflective film, but also a surface composed of other reflective materials other than reflective mirrors and reflective film.

[0059] Thus, by providing a fixture 13 for securing 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, thereby representing the vibration of the sample. Vibration information of the sample can then be obtained by analyzing the laser beam 27 reflected by the reflective device 14. Furthermore, by providing a reflective surface that at least covers the target illumination area of ​​the laser beam 27, the laser beam 27 emitted by the laser vibrometer can be reflected in multiple directions, thereby enabling the vibration of the sample and / or sample holder to be measured in multiple directions, thereby improving the accuracy of the test.

[0060] Optionally, the high-precision magnetic measurement device further comprises a displacement device 10. One end of the displacement device 10 is connected with the sample rod, and the other end is connected with the control device.

[0061] In the embodiments of the present disclosure, the control device is connected with the data processing device, and the control device can control the displacement device 10 according to the processing result of the data processing device, so as to displace the sample rod.

[0062] In the embodiments of the present disclosure, the displacement device 10 can be a device capable of displacing the sample rod in any direction, such as a three-axis displacement table (X, Y and Z axes) or a four-axis displacement table (X, Y, Z and rotation axis), etc.

[0063] In this way, the displacement device 10 can be accurately controlled by the control device, and the position of the sample rod can be accurately adjusted, so that the sample rod can move in different directions, increasing the flexibility of measurement, thereby allowing the magnetic measurement of the sample to be performed at multiple angles and multiple positions.

[0064] The above description and drawings sufficiently show the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments represent only the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included or replaced by parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A high-precision magnetic measuring device, characterized in that: include: A sample holder, including a sample holder for fixing the sample; A magnetic field generating device, comprising at least two gradient magnetic field generating devices for generating gradient magnetic fields in different directions; wherein the sample is located within the action areas of the gradient magnetic fields in different directions; The vibration measurement assembly includes at least one laser vibration measuring device for acquiring vibration information of the sample and / or the sample rod.

2. The device according to claim 1, characterized in that The magnetic field generating device also includes: At least one bias magnetic field generating device is used to generate a bias magnetic field; wherein the sample is located in the effective area of ​​the bias magnetic field.

3. The device according to claim 2, characterized in that The bias magnetic field generating device is provided with a first through hole, and the laser emitted by the laser vibration measuring device can pass through the first through hole and irradiate the sample and / or the sample rod.

4. The device according to claim 1, characterized in that A second through hole is provided on the gradient magnetic field generating device, and the laser emitted by the laser vibration measuring device can pass through the second through hole and irradiate the sample and / or the sample rod.

5. The device according to claim 1, characterized in that The vibration measurement kit includes: A movable omnidirectional laser vibrometer; wherein the omnidirectional laser vibrometer can be moved to different positions to measure the vibration information of the sample and / or sample rod in gradient magnetic fields in different directions.

6. The device according to claim 1, characterized in that The vibration measurement kit includes: There are a corresponding number of laser vibrometers as there are gradient magnetic field generating devices; wherein each laser vibrometer is provided correspondingly to each gradient magnetic field generating device.

7. The device according to any one of claims 1 to 6, characterized in that The magnetic field generating device includes: A first gradient magnetic field generating device, configured to generate a gradient magnetic field in a first direction; A second gradient magnetic field generating device, used for generating a gradient magnetic field in a second direction; The first direction and the second direction are orthogonal.

8. The device according to claim 7, characterized in that The vibration measurement kit includes: a first laser vibration measuring device, arranged corresponding to the first gradient magnetic field generating device, for detecting vibration of the sample and / or the sample rod in a first direction; The second laser vibration measuring device is provided corresponding to the second gradient magnetic field generating device, and is used to detect the vibration of the sample and / or the sample rod in the second direction.

9. The device according to any one of claims 1 to 6, characterized in that The sample holder includes: A fixing device for fixing the sample; The reflective device is connected to the fixing device and includes a reflective surface covering at least a target irradiation area of ​​the laser beam, and is used to reflect the laser beam emitted by the laser vibrometer; wherein the target irradiation area includes the irradiation areas of the laser beams emitted by at least two laser vibrometers.

10. The device according to any one of claims 1 to 6, characterized in that The high-precision magnetic measurement device also includes: Displacement device, connected to the sample rod.

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