High-precision magnetic measuring device
By acquiring the magnetic characteristics of a sample in multiple directions without rotating the sample, using a gradient magnetic field and a laser vibration meter, the problem of insufficient testing accuracy caused by single-direction measurement in existing technologies is solved, and high-precision multi-directional magnetic measurement is achieved.
Patent Information
- Application Number
- CN202520443238.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Existing magnetic measurement methods can only measure one direction of the sample, which means that magnetic materials with different magnetization characteristics in different directions cannot provide enough data, resulting in insufficient test accuracy.
By employing a gradient magnetic field generator and a pose adjustment device, gradient magnetic fields are generated in different directions without rotating the sample. Combined with a laser vibration meter, vibration information of the sample in orthogonal directions is obtained, thereby achieving multi-directional magnetic feature measurement.
It improves the accuracy of magnetic measurements, enabling the acquisition of magnetic characteristics of samples in multiple directions without rotating the samples, simplifying the testing process and improving testing precision.
Smart Images
Figure CN223897629U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of test and measurement technology, for example to a high-precision magnetic measurement device. Background Technology
[0002] Currently, existing magnetic measurement methods are limited by the design and ease of operation of the equipment, often only allowing the measurement of vibration information in one direction of the sample. However, some magnetic materials may exhibit high permeability or low coercivity in a specific direction, while being completely different in other directions. The magnetization characteristics of magnetic materials may vary significantly in different directions, and unidirectional measurement cannot provide sufficient data to accurately describe the magnetization process of the sample, making existing technologies potentially insufficient in terms of testing accuracy.
[0003] To overcome the aforementioned limitations, related technologies utilize sample rotation to achieve vibration measurements in two directions, aiming to improve testing accuracy. By testing the sample at different angles, magnetization information in two orthogonal directions is collected, providing more comprehensive magnetic data to more accurately characterize the material's magnetic properties.
[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:
[0005] The related technology's measurement method improves the accuracy of the test to some extent by rotating the sample to obtain magnetic characteristics in different directions. However, rotating the sample changes its orientation angle, and the magnetic characteristics measured before and after rotation are the magnetic characteristics of the sample at different angles. Therefore, even at the same angle, the related technology still measures in one direction, resulting in low accuracy of the test results.
[0006] The information disclosed in the background section is only intended to enhance the understanding of the background of this utility model, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.
[0008] This disclosure provides a high-precision magnetic measurement device to measure the magnetic characteristics of a sample in different directions without rotating the sample, thereby improving the accuracy of magnetic measurement.
[0009] In some embodiments, the high-precision magnetic measurement device includes: a sample rod, including a sample holder for fixing the sample; a magnetic field generating device, including a gradient magnetic field generating device and a pose adjustment device for switching the gradient magnetic field generating device between a first state and a second state; and a vibration measurement component, including at least one laser vibration measuring device for acquiring vibration information of the sample and / or the sample rod; wherein, when the gradient magnetic field generating device is in the first state, the gradient magnetic field is along a first direction, and when the gradient magnetic field generating device is in the second state, the gradient magnetic field is along a second direction orthogonal to the first direction; and the sample is located within the effective region of the gradient magnetic field.
[0010] Optionally, the gradient magnetic field generating device includes: a first gradient magnetic field generating unit; and a second gradient magnetic field generating unit, which is disposed opposite to the first gradient magnetic field generating unit; wherein the first gradient magnetic field generating unit and the second gradient magnetic field generating unit are respectively connected to the pose adjustment device.
[0011] Optionally, the first gradient magnetic field generating unit and the second gradient magnetic field generating unit are symmetrically distributed along a set central axis, which passes through the geometric center of the sample holder; wherein, the effective areas in the first gradient magnetic field generating unit and the second gradient magnetic field generating unit used to generate gradient magnetic fields are on the same plane as the areas on the sample holder that bear the sample and are subjected to gradient magnetic fields.
[0012] Optionally, the magnetic field generating device further includes: at least one bias magnetic field generating device for generating a bias magnetic field; wherein the sample is located within the effective region of the bias magnetic field.
[0013] Optionally, a first through hole is provided on the bias magnetic field generating device, and the laser emitted by the laser vibration measuring device can pass through the first through hole to irradiate the sample and / or sample rod.
[0014] Optionally, a second through hole is provided on the gradient magnetic field generator, through which the laser emitted by the laser vibration measuring device can irradiate the sample and / or sample rod.
[0015] 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 the vibration information of the sample and / or sample rod.
[0016] Optionally, the vibration measurement component includes: a first laser vibration measuring device, configured corresponding to the first direction, for detecting the vibration of the sample and / or sample rod in the first direction; and a second laser vibration measuring device, configured corresponding to the second direction, for detecting the vibration of the sample and / or sample rod in the second direction.
[0017] Optionally, the sample holder includes: a fixing device for fixing the sample; and a reflective device connected to the fixing device, including a reflective surface covering at least the target irradiation area of the laser beam for reflecting the laser beam emitted by the laser vibration measuring device; wherein the target irradiation area includes the irradiation area of at least two laser beams emitted by the laser vibration measuring device.
[0018] Optionally, the high-precision magnetic measuring device also includes a displacement device connected to the sample rod.
[0019] The high-precision magnetic measuring device provided in this disclosure can achieve the following technical effects:
[0020] The high-precision magnetic measurement device includes a sample rod, a magnetic field generator, and a vibration measurement component. The sample rod includes a sample holder for fixing the sample. The magnetic field generator includes a gradient magnetic field generator and a pose adjustment device for switching the gradient magnetic field generator between a first state and a second state. The vibration measurement component includes at least one laser vibrometer for acquiring vibration information of the sample and / or the sample rod. When the gradient magnetic field generator is in the first state, the gradient magnetic field is along a first direction; when the gradient magnetic field generator is in the second state, the gradient magnetic field is along a second direction orthogonal to the first direction, and the sample is located within the effective region of the gradient magnetic field. By setting the pose adjustment device to enable the gradient magnetic field generator to generate gradient magnetic fields in the orthogonal first and second directions, vibration information of the sample in orthogonal directions can be acquired without rotating the sample and / or the sample rod, thereby measuring the magnetic characteristics of the sample in two orthogonal directions and improving the accuracy of the test.
[0021] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description
[0022] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:
[0023] Figure 1 This is a partial front view schematic diagram of a high-precision magnetic measuring device provided in an embodiment of this disclosure;
[0024] Figure 2 This is a partial top view schematic diagram of a high-precision magnetic measuring device provided in an embodiment of this disclosure;
[0025] Figure 3 This is a partial top view of another high-precision magnetic measuring device provided in this embodiment of the present disclosure;
[0026] Figure 4This is a schematic diagram of the installation structure of the gradient magnetic field generating device provided in the embodiments of this disclosure.
[0027] Figure label:
[0028] 10: Displacement device; 11: Fixing structure; 12: Rod-shaped structure; 13: Fixing device; 14: Reflecting device; 20: Gradient magnetic field generating device; 21: Omnidirectional laser vibration measuring device; 22: First laser vibration measuring device; 23: Second laser vibration measuring device; 24: Bias magnetic field generating device; 25: First through hole; 26: Second through hole; 27: Laser beam; 28: Position adjustment device; 29: First gradient magnetic field generating unit; 30: Second gradient magnetic field generating unit. Detailed Implementation
[0029] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.
[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.
[0031] Combination Figures 1 to 4 As shown, this disclosure provides a high-precision magnetic measurement device, including a sample rod, a magnetic field generator, a vibration measurement component, and a data processing device. The sample rod includes a sample holder for fixing the sample. The magnetic field generator includes a gradient magnetic field generator 20 and a pose adjustment device 28 for switching the gradient magnetic field generator 20 between a first state and a second state. The vibration measurement component includes at least one laser vibration meter for acquiring vibration information of the sample and / or the sample rod. When the gradient magnetic field generator 20 is in the first state, the gradient magnetic field is along a first direction; when the gradient magnetic field generator 20 is in the second state, the gradient magnetic field is along a second direction orthogonal to the first direction. The sample is located within the area of effect of the gradient magnetic field. 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.
[0032] In this embodiment, the gradient magnetic field generating device 20 can be any device capable of generating a gradient magnetic field, such as a device composed of gradient coils and / or gradient coils wound on a solid body and / or other devices composed of gradient coils. The gradient magnetic field generating device 20 includes a pair of first gradient magnetic field generating units 29 and second gradient magnetic field generating units 30. The sample can be placed at any position between the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30, specifically according to measurement requirements. Specifically, the sample can be placed in the middle of the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30, or in a region close to the first gradient magnetic field generating unit 29 or a region close to the second gradient magnetic field generating unit 30, etc. In this way, 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 region between the two gradient magnetic field generating units, the rate of change of the magnetic field (i.e., the gradient) is the highest. By placing 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, thereby enabling more accurate measurement of the magnetic response of the sample.
[0033] In this embodiment of the disclosure, the first direction and the second direction can be any two orthogonal directions. For example, the first direction is the X direction and the second direction is the Y direction; or, the first direction is the X direction and the second direction is the Z direction; or, the first direction is the Y direction and the second direction is the Z direction. Figure 2 As shown, the pose adjustment device 28 allows the paired first gradient magnetic field generating unit 29 and second gradient magnetic field generating unit 30 of the gradient magnetic field generating device 20 to be positioned from the X direction ( Figure 2 (As shown by the solid line) Rotate to the Y direction ( Figure 2 (As shown by the dashed line).
[0034] In this embodiment, the pose adjustment device 28 can be any device capable of adjusting the direction of the gradient magnetic field generated by the gradient magnetic field generator 20. Examples include devices that control the rotation of the gradient magnetic field generator 20 and / or devices that control the axial displacement of the gradient magnetic field generator 20.
[0035] In this embodiment, the vibration measurement assembly includes at least one laser vibrometer device corresponding to the gradient magnetic field generator 20. For example, the vibration measurement assembly may include at least one movable omnidirectional laser vibrometer device 21 to measure the vibration information of the sample and / or sample rod under the action of gradient magnetic fields in different directions by moving it to different positions. Figure 2As shown, by rotating the omnidirectional laser vibration measuring device 21 from the X direction (shown in the figure) to the Y direction (shown in the figure by the dashed line), the vibration information of the sample and / or sample rod under the action of orthogonal gradient magnetic fields in the X and Y directions can be measured. The device for adjusting the pose of the omnidirectional laser vibration measuring device 21 can be the pose adjustment device 28 of this embodiment. The pose adjustment device 28 can simultaneously adjust the poses of the gradient magnetic field generator 20 and the omnidirectional laser vibration measuring device 21, or it can adjust the poses of the gradient magnetic field generator 20 and the omnidirectional laser vibration measuring device 21 separately. The device for adjusting the pose of the omnidirectional laser vibration measuring device 21 can also be a separate adjustment device for individually controlling the omnidirectional laser vibration measuring device 21, which is not limited here. The vibration measurement assembly may also include laser vibration measuring devices corresponding to the direction to be measured (the first and second directions mentioned above), with a first laser vibration measuring device 22 corresponding to the first direction and a second laser vibration measuring device 23 corresponding to the second direction respectively provided in the orthogonal first and second directions. Specifically, as shown... Figure 3 As shown, a first laser vibration measuring device 22 in the X direction and a second laser vibration measuring device 23 in the Y direction are respectively set in the orthogonal X and Y directions; or, a first laser vibration measuring device 22 in the X direction, a second laser vibration measuring device 23 in the Y direction, and a third laser vibration measuring device in the Z direction are respectively set in the orthogonal X, Y, and Z directions, etc. The number of laser vibration measuring devices can be set according to the testing requirements (such as the number of directions to be measured). The laser vibration measuring device can be a laser Doppler vibrometer. The laser beam 27 emitted by the laser Doppler vibrometer irradiates the sample and / or sample rod, and the laser Doppler vibrometer receives the laser beam 27 reflected from the sample and / or sample rod, and measures the Doppler frequency shift of the reflected laser beam 27 to extract the vibration of the sample and / or sample rod.
[0036] Thus, the high-precision magnetic measurement device includes a sample rod, a magnetic field generator, and a vibration measurement component. The sample rod includes a sample holder for fixing the sample. The magnetic field generator includes a gradient magnetic field generator 20 and a pose adjustment device 28 for switching the gradient magnetic field generator 20 between a first state and a second state. The vibration measurement component includes at least one laser vibration meter for acquiring vibration information of the sample and / or the sample rod. When the gradient magnetic field generator 20 is in the first state, the gradient magnetic field is along a first direction; when the gradient magnetic field generator 20 is in the second state, the gradient magnetic field is along a second direction orthogonal to the first direction, and the sample is located within the area of influence of the gradient magnetic field. By setting the pose adjustment device 28 to enable the gradient magnetic field generator 20 to generate gradient magnetic fields in the orthogonal first and second directions, vibration information of the sample in orthogonal directions can be acquired without rotating the sample and / or the sample rod, thereby measuring the magnetic characteristics of the sample in two orthogonal directions and improving the accuracy of the test.
[0037] Optionally, such as Figure 4 As shown, the gradient magnetic field generating device 20 includes a first gradient magnetic field generating unit 29 and a second gradient magnetic field generating unit 30. The first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 are arranged opposite to each other. The first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 are respectively connected to the pose adjustment device 28.
[0038] In this embodiment, the magnetic fields generated by the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 are in the same direction. When the two magnetic field generating units generate magnetic fields in the same direction, by changing their magnetic field strength (e.g., by adjusting the current), a gradient magnetic field with a gradient change in magnetic field strength can be generated at the location of the sample.
[0039] In this way, by connecting the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 to the pose adjustment device 28 respectively, the pose of the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 can be adjusted synchronously through the pose adjustment device 28, so that the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 are in the same direction.
[0040] Optionally, the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 are symmetrically distributed along a set central axis, which passes through the geometric center of the sample holder. The effective regions in the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 used to generate the gradient magnetic field are both on the same plane as the region on the sample holder that carries the sample and is subjected to the gradient magnetic field.
[0041] In this way, by aligning the effective regions for generating gradient magnetic fields in the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 with the region on the sample holder that supports the sample and is subjected to the gradient magnetic field, the first gradient magnetic field generating unit 29, the second gradient magnetic field generating unit 30, and the sample can be roughly at the same height. Within this height plane, the magnetic fields generated by the first gradient magnetic field generating unit 29 and the second gradient magnetic field generating unit 30 are superimposed at the sample holder, forming a magnetic field with a gradient change along the measurement direction (e.g., axial direction), causing the magnetic moment in the sample to vibrate under the influence of force. The distribution of the magnetic field can be made relatively uniform by designing parameters such as the number of turns of the coil, the magnitude of the current, and the shape. In a uniform gradient magnetic field, the relationship between the magnetic force and the change in magnetic field strength experienced by the sample is more consistent with theoretical expectations, thus enabling more accurate measurement of the magnetic parameters of the sample.
[0042] Optionally, the magnetic field generating device further 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. The sample is located within the area of effect of the bias magnetic field.
[0043] In this embodiment of the disclosure, the magnetic field generating device further includes at least one bias magnetic field generating device 24, such as one bias magnetic field generating device 24 provided in the X direction; or one bias magnetic field generating device 24 provided in the Y direction; or one bias magnetic field generating device 24 provided in both the X and Y directions. Specifically, the number of bias magnetic field generating devices 24 can be set according to the test requirements.
[0044] In this embodiment, the bias magnetic field generating device 24 includes a pair of first bias magnetic field generating units and second bias magnetic field generating units. A sample is disposed between the first and second bias magnetic field generating units. The first and second bias magnetic field generating units can be electromagnets and / or electromagnetic coils. For example, the first and second bias magnetic field generating units can both be electromagnets; or, the first and second bias magnetic field generating units can both be electromagnetic coils; or, the first and second bias magnetic field generating units can both be electromagnetic coils; or, the first and second bias magnetic field generating units can both be electromagnetic coils; or, the first and second bias magnetic field generating units can both be electromagnetic coils. The sample can be disposed at any position between the first and second bias magnetic field generating units, depending on the measurement requirements. Specifically, the sample can be disposed in the middle of the first and second bias magnetic field generating units, or in a region close to the first or second bias magnetic field generating unit, etc.
[0045] 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 setting up the bias magnetic field generator 24 and changing the magnetic field strength generated by the bias magnetic field generator 24, the change of the magnetization intensity (the sum of magnetic moments in the region) of the sample with the magnetic field strength can be measured, thereby obtaining the magnetic hysteresis loop of the sample.
[0046] Optionally, a first through hole 25 is provided on the bias magnetic field generating device 24, and the laser emitted by the laser vibration measuring device can pass through the first through hole 25 to irradiate the sample and / or sample rod.
[0047] In this embodiment, the first through-hole 25 can be specifically disposed on a bias magnetic field generating unit near the omnidirectional laser vibration measuring device 21, the first laser vibration measuring device 22, or the second laser vibration measuring device 23; it can also be disposed on paired bias magnetic field generating units. For example, it can be disposed on the bias magnetic field generating unit of the first bias magnetic field generating device 24 near the first laser vibration measuring device 22; and / or, it can be disposed on the bias magnetic field generating unit of the second bias magnetic field generating device 24 near the second laser vibration measuring device 23. (In conjunction with...) Figures 1 to 3 As shown, the laser beam 27 emitted by the omnidirectional laser vibration measuring device 21 or the first laser vibration measuring device 22 in the X direction can irradiate the sample and / or sample rod from the X direction through the first through-hole 25 on the bias magnetic field generating device 24. The laser beam 27 reflected by the sample and / or sample rod can then irradiate back to the omnidirectional laser vibration measuring device 21 or the first laser vibration measuring device 22 in the X direction through the first through-hole 25 on the bias magnetic field generating device 24, thereby realizing the measurement of the vibration of the sample and / or sample rod in the X direction. The laser beam 27 emitted by the omnidirectional laser vibration measuring device 21 or the second laser vibration measuring device 23 in the Y direction can directly irradiate the sample and / or sample rod from the Y direction. The laser beam 27 reflected by the sample and / or sample rod is reflected back to the omnidirectional laser vibration measuring device 21 or the second laser vibration measuring device 23 in the Y direction, thereby realizing the measurement of the vibration of the sample and / or sample rod in the Y direction.
[0048] In this way, by providing a first through hole 25 on the bias magnetic field generator 24, the laser vibration measuring device can measure the vibration of the sample without contacting the sample. Furthermore, by integrating the measurement optical path of the laser vibration measuring device into the first through hole 25 of the bias magnetic field generator 24, additional equipment and complex wiring can be reduced, thereby reducing the overall space occupied by the device.
[0049] Optionally, a second through hole 26 is provided on the gradient magnetic field generating device 20, and the laser emitted by the laser vibration measuring device can pass through the second through hole 26 to irradiate the sample and / or sample rod.
[0050] In this embodiment, the second through-hole 26 can be disposed on any gradient magnetic field generating unit in the gradient magnetic field generating device 20. (Combined with...) Figure 1 and Figure 2 As shown, the second through hole 26 is disposed on the second gradient magnetic field generating unit 30 near the first laser vibration measuring device 22 or the omnidirectional laser vibration measuring device 21. The second through hole 26 can also be disposed on two gradient magnetic field generating units arranged in pairs.
[0051] In this embodiment, the gradient magnetic field generator 20 may not be connected to the bias magnetic field generator 24, or it may be connected to the bias magnetic field generator 24 in any way. Specifically, the pose of the gradient magnetic field generator 20 is adjusted by the pose adjustment device 28. When the two opposing gradient magnetic field generating units of the gradient magnetic field generator 20 are adjusted to the corresponding direction to be measured (first direction or second direction), the two opposing gradient magnetic field generating units can be wound around the two opposing poles of the bias magnetic field generator 24, or a cylinder can be provided on the two opposing poles of the bias magnetic field generator 24, and a groove or hole can be reserved on the cylinder to embed the two opposing gradient magnetic field generating units therein.
[0052] Thus, by providing a second through-hole 26 on the gradient magnetic field generator 20, the laser vibration meter can measure the vibration of the sample without contacting it. Furthermore, by integrating the measurement optical path of the laser vibration meter into the first through-hole 25 of the bias magnetic field generator 24 and the second through-hole 26 on the gradient magnetic field generator 20, additional equipment and complex wiring can be reduced, thereby reducing the overall space occupied by the device. In addition, by directly mounting the gradient magnetic field generator 20 on the bias magnetic field generator 24, additional components and connections can be reduced, making the entire device more compact and easier to install and maintain.
[0053] Optionally, the vibration measurement assembly includes a movable omnidirectional laser vibration meter 21. The omnidirectional laser vibration meter 21 can be moved to different positions to measure the vibration information of the sample and / or sample rod.
[0054] In this embodiment, the vibration measurement component includes a movable omnidirectional laser vibration measuring device 21. By adjusting the position of the omnidirectional laser vibration measuring device 21, it can measure the vibration information of the sample and / or sample rod in different directions from different directions. For example, when the gradient magnetic field generator 20 in the X direction generates a gradient magnetic field in the X direction, the omnidirectional laser vibration measuring device 21 can be moved to the X direction, and the omnidirectional laser vibration measuring device 21 emits a laser beam 27 from the X direction onto the sample and / or sample rod to measure the vibration information of the sample and / or sample rod in the X direction; when the gradient magnetic field generator 20 in the Y direction generates a gradient magnetic field in the Y direction, the omnidirectional laser vibration measuring device 21 can be moved to the Y direction, and the omnidirectional laser vibration measuring device 21 emits a laser beam 27 from the Y direction onto the sample and / or sample rod to measure the vibration information of the sample and / or sample rod in the Y direction.
[0055] In this way, by setting up a movable laser vibration measurement device, only one laser vibration measurement device is needed to measure the vibration information of the sample and / or sample rod in multiple directions.
[0056] 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 configured corresponding to the first direction and is used to detect the vibration of the sample and / or sample rod in the first direction. The second laser vibration measuring device 23 is configured corresponding to the second direction and is used to detect the vibration of the sample and / or sample rod in the second direction.
[0057] In this embodiment, the vibration measurement component includes laser vibration measurement devices arranged corresponding to the direction to be measured, with each laser vibration measurement device corresponding to a specific direction to be measured. By activating the laser vibration measurement device in the direction corresponding to the direction of the gradient magnetic field (the direction to be measured), vibration information of the sample and / or sample rod in different directions can be measured from different directions. For example, when the gradient magnetic field generator 20 is adjusted to the X direction and generates a gradient magnetic field in the X direction, the laser vibration measurement device in the X direction can be activated to emit a laser beam 27 from the X direction onto the sample and / or sample rod, and the vibration information of the sample and / or sample rod in the X direction can be measured; when the gradient magnetic field generator 20 is adjusted to the Y direction and generates a gradient magnetic field in the Y direction, the laser vibration measurement device in the Y direction can be activated to emit a laser beam 27 from the Y direction onto the sample and / or sample rod, and the vibration information of the sample and / or sample rod in the Y direction can be measured.
[0058] In this way, by setting the laser vibration measurement device in the orthogonal direction, the vibration information of the sample and / or sample rod in the orthogonal direction can be measured without rotating the laser vibration measurement device, thus simplifying the testing procedure.
[0059] Optionally, the sample holder includes a fixing device 13 and a reflective device 14. The fixing device 13 is used to fix the sample; the reflective device 14 is connected to the fixing device 13 and includes a reflective surface that covers at least the target irradiation area of the laser beam 27 for reflecting 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.
[0060] In this embodiment of the disclosure, combined 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 via 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 to the surface or interior of the fixing device 13 by adhesive, clamps, or other means. The surface of the reflective device 14 can be provided with a reflector and / or a reflective film. Specifically, the fixing device 13 can be a polyhedron, and the sample can be fixed to any one or more faces of the polyhedron by adhesive or clamps. The reflective device 14 can be a cylinder or a polyhedron. One or more reflectors can be provided, and these reflectors can be fixed to any one or more faces of the polyhedron. A reflective film can be attached to the polyhedron or cylinder, such as to part or all of its surface. By fixing the reflectors or reflective film to 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. Therefore, the magnetic characteristics of the sample in multiple directions can be measured without rotating the sample and / or sample rod. If a reflective film is attached to all surfaces of the reflective device 14, the laser beams 27 reflected in the X and Y directions can be collected without rotating the sample rod, thereby measuring the vibration of the sample and / or sample rod in the X and Y directions and achieving the measurement of the magnetic characteristics of the sample in multiple directions.
[0061] In this embodiment, the reflective device 14 is provided with a reflective surface that at least covers the target irradiation area of the laser beam 27. Specifically, the target irradiation area includes the area irradiated by laser beams 27 emitted by at least two laser vibration measuring devices when the sample and / or sample rod is stationary or vibrating, so as to reflect the laser beams 27 irradiated in at least two orthogonal directions, thereby enabling the measurement of the vibration of the sample and / or sample rod in at least two orthogonal directions. The reflective surface can be not only a mirror and / or a reflective film, but also a surface composed of other reflective materials besides mirrors and reflective films.
[0062] In this way, by setting up a fixing device 13 for fixing the sample and a reflective device 14 connected to the fixing device 13, the reflective device 14 can vibrate with the vibration of the sample. Thus, the vibration of the reflective device 14 can characterize the vibration of the sample, and the vibration information of the sample can be obtained by analyzing the laser beam 27 reflected by the reflective device 14. In addition, by setting up a reflective surface that at least covers the target irradiation area of the laser beam 27, the laser beam 27 emitted by the laser vibration measuring device in multiple directions can be reflected, thereby measuring the vibration of the sample and / or sample rod in multiple directions and improving the accuracy of the test.
[0063] Optionally, the high-precision magnetic measuring device also includes a displacement device 10 connected to the sample rod. One end of the displacement device 10 is connected to the sample rod, and the other end is connected to the control device.
[0064] In this embodiment of the disclosure, 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 make the sample rod displacement.
[0065] In this embodiment of the disclosure, the displacement device 10 can be a device that can drive the sample rod to move 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 axis).
[0066] In this way, by precisely controlling the displacement device 10 through the control device, the position of the sample rod can be precisely adjusted, allowing the sample rod to move in different directions, increasing the flexibility of measurement, and thus allowing for multi-angle and multi-position magnetic measurements of the sample.
[0067] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. 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: Sample rod, including a sample holder for fixing the sample; A magnetic field generating device includes a gradient magnetic field generating device and a pose adjustment device for switching the gradient magnetic field generating device between a first state and a second state. Vibration measurement assembly, including at least one laser vibration measurement device, for acquiring vibration information of the sample and / or sample rod; Specifically, when the gradient magnetic field generator is in the first state, the gradient magnetic field is along the first direction; when the gradient magnetic field generator is in the second state, the gradient magnetic field is along the second direction orthogonal to the first direction; the sample is located within the effective region of the gradient magnetic field.
2. The apparatus according to claim 1, characterized in that, The gradient magnetic field generator includes: First gradient magnetic field generating unit; The second gradient magnetic field generating unit is arranged opposite to the first gradient magnetic field generating unit; The first gradient magnetic field generating unit and the second gradient magnetic field generating unit are respectively connected to the posture adjustment device.
3. The apparatus according to claim 2, characterized in that, The first gradient magnetic field generating unit and the second gradient magnetic field generating unit are symmetrically distributed along a set central axis, which passes through the geometric center of the sample holder. The effective areas in the first and second gradient magnetic field generating units used to generate gradient magnetic fields are on the same plane as the areas on the sample holder that support the sample and are affected by the gradient magnetic field.
4. The apparatus 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 within the area of influence of the bias magnetic field.
5. The apparatus according to claim 4, characterized in that, A first through hole is provided on the bias magnetic field generating device, and the laser emitted by the laser vibration measuring device can pass through the first through hole to irradiate the sample and / or sample rod.
6. The apparatus according to any one of claims 1 to 5, 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 to irradiate the sample and / or sample rod.
7. The apparatus according to any one of claims 1 to 5, characterized in that, The vibration measurement assembly includes: A portable omnidirectional laser vibration measurement device; wherein the omnidirectional laser vibration measurement device can be moved to different positions to measure the vibration information of the sample and / or sample rod.
8. The apparatus according to any one of claims 1 to 5, characterized in that, The vibration measurement assembly includes: A first laser vibration measuring device is set in accordance with the first direction and is used to detect the vibration of the sample and / or sample rod in the first direction; The second laser vibration measuring device, which is set in accordance with the second direction, is used to detect the vibration of the sample and / or sample rod in the second direction.
9. The apparatus according to any one of claims 1 to 5, characterized in that, The sample holder includes: Fixing device, used to fix the sample; A reflective device, connected to a fixed device, includes a reflective surface covering at least the target irradiation area of the laser beam for reflecting the laser beam emitted by the laser vibration measuring device; wherein the target irradiation area includes the irradiation area of at least two laser beams emitted by the laser vibration measuring devices.
10. The apparatus according to any one of claims 1 to 5, characterized in that, The high-precision magnetic measurement device also includes: The displacement device is connected to the sample rod.