Magnetic testing device

Abstract

This invention provides a magnetic testing device. The device includes: a mounting frame; and a sample fixing structure mounted on the mounting frame. The sample fixing structure includes a sample rod and a sample holder, connected to the sample rod. The sample holder includes a main body and a clamping structure mounted on the main body. The clamping structure includes at least two clamping members arranged opposite each other along a first direction, forming a sample clamping space between the at least two clamping members. This invention solves the problem that when using existing sample fixing structures for magnetic testing, the sample easily slips off the glass slide when the sample holder resonates with the sample fixing structure.

Description

Technical Field

[0001] This utility model relates to the field of magnetic variable measurement technology, and more specifically, to a magnetic testing device. Background Technology

[0002] Alternating Gradient Magnetometry (AGM), as an advanced magnetic testing method, has been widely used in scientific research and industrial inspection. The core idea of ​​AGM is to apply an alternating gradient magnetic field to a sample and measure its dynamic response within that field, thereby accurately characterizing its magnetic properties. Compared to traditional static magnetic measurement methods, AGM offers higher accuracy, faster response time, and excellent signal-to-noise ratio in alternating magnetic field environments, making it an ideal choice for detecting dynamic magnetic materials.

[0003] However, the main body of a traditional AGM sample holder is a long rod made of materials such as quartz, with a sample holder at the bottom for adhering the sample. The sample holder is usually a glass plate. During the AGM test, the magnetic sample is subjected to alternating forces in the alternating gradient field and resonates with the sample holder. Since the sample is adhered to the sample holder, when the sample holder and the sample holder resonate, the sample is prone to slipping off the glass plate. Utility Model Content

[0004] The main purpose of this invention is to provide a magnetic testing device that can solve the problem that when the sample holder and the sample fixing structure resonate during magnetic testing using existing sample fixing structures, the sample easily slips off the glass slide.

[0005] To achieve the above objectives, according to one aspect of the present invention, a magnetic testing device is provided, comprising: a mounting frame; a sample fixing structure mounted on the mounting frame, the sample fixing structure including a sample rod and a sample seat, the sample seat being connected to the sample rod, the sample seat including a main body and a clamping structure mounted on the main body, the clamping structure including at least two clamping members arranged opposite to each other along a first direction, and a sample clamping space being formed between the at least two clamping members arranged opposite to each other.

[0006] Furthermore, the main body is provided with an installation channel that runs through the main body in a first direction, and the clamping component is installed in the installation channel.

[0007] Furthermore, the end of the sample rod is provided with a connecting structure, which has a second mounting groove, and the sample holder is installed in the second mounting groove.

[0008] Furthermore, the main body and the connecting structure are snapped together, the first mounting groove is connected to the second mounting groove, and the side wall of the second mounting groove can press the clamping part in the first direction.

[0009] Furthermore, the connection structure is U-shaped, including a connecting section and two clamping sections connected to the connecting section. The two clamping sections form the sidewalls of the second mounting groove. The two clamping sections are spaced apart at opposite ends of the connecting section along a first direction. Along the first direction, the main body has a first side and a second side arranged opposite to each other. Each of the first side and the second side of the main body is provided with a slot. The slots extend in a vertical direction. The two clamping sections are arranged in a one-to-one correspondence with the two slots, and the clamping sections are engaged in the corresponding slots.

[0010] Furthermore, a beam reflection structure is provided on the connection structure.

[0011] Furthermore, the clamping structure also includes at least two elastic members arranged at intervals along the first direction. The elastic members are located between at least two clamping members arranged opposite each other and are able to clamp the sample under the pressing action of the clamping members.

[0012] Furthermore, there are three elastic elements, which are arranged sequentially along the first direction, forming a sample clamping space between two adjacent elastic elements.

[0013] Furthermore, the thickness of the elastic element ranges from 1μm to 50μm.

[0014] According to another aspect of the present invention, a magnetic testing device is provided, comprising: a mounting frame; a sample fixing structure mounted on the mounting frame, the sample fixing structure including a sample rod and a sample seat, the sample seat being connected to the sample rod, the sample seat including a main body and a clamping structure, the clamping structure including at least two clamping members, the main body being provided with an installation channel extending through the main body along a first direction, a spacer being provided in the installation channel, the spacer dividing the installation channel into two first installation slots arranged along the first direction, at least one clamping member being provided on each opposite side of the spacer along the first direction, the clamping members being installed in the first installation slots, and a sample clamping space being formed between the spacer and the clamping members.

[0015] The present invention provides a sample rod and a sample holder. The sample holder includes a main body and a clamping structure mounted on the main body. The clamping structure includes at least two clamping members arranged opposite each other along a first direction. A sample clamping space is formed between the at least two clamping members arranged opposite each other. The clamping members can clamp the sample so that even when the sample holder and the sample rod resonate, the sample will not slip off the sample holder. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1A schematic diagram of the sample fixing structure according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram of the magnetic testing device according to an embodiment of the present invention is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. Sample rod; 20. Sample holder; 21. Main body; 22. Clamping component; 23. Slot; 24. Mounting channel; 241. First mounting slot; 30. Connecting structure; 31. Connecting section; 32. Pressing section; 33. Second mounting slot; 50. Elastic component; 60. First displacement stage; 70. Second displacement stage; 80. Mounting bracket; 90. Gradient coil; 100. Offset coil; 200. Coil fixing device; 300. Laser vibrometer. Detailed Implementation

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 and Figure 2 As shown, this utility model provides a magnetic testing device, which includes: a mounting frame 80; a sample fixing structure mounted on the mounting frame 80, the sample fixing structure including a sample rod 10 and a sample seat 20, the sample seat 20 being connected to the sample rod 10, the sample seat 20 including a main body 21 and a clamping structure mounted on the main body 21, the clamping structure including at least two clamping members 22 arranged opposite to each other along a first direction, and a sample clamping space being formed between the at least two clamping members 22 arranged opposite to each other.

[0023] In this embodiment, the clamping structure on the sample holder 20 includes at least two clamping members 22 arranged opposite to each other along a first direction, and a sample clamping space is formed between the at least two clamping members 22 arranged opposite to each other. The clamping members 22 can clamp the sample (especially the powder sample) so that even when the sample holder 20 and the sample rod 10 resonate, the sample will not slip off the sample holder 20.

[0024] It should be noted that the sample fixation structure of this application is applied to an AGM device for studying the magnetic properties of materials under specific conditions (such as magnetic fields).

[0025] like Figure 1 and Figure 2As shown, this utility model provides a magnetic testing device, which includes: a mounting frame 80; a sample fixing structure mounted on the mounting frame 80, the sample fixing structure including a sample rod 10 and a sample seat 20, the sample seat 20 being connected to the sample rod 10, the sample seat 20 including a main body 21 and a clamping structure, the clamping structure including at least two clamping members 22, the main body 21 being provided with an installation channel 24 extending through the main body 21 along a first direction, the installation channel 24 being provided with a spacer, the spacer dividing the installation channel 24 into two first installation grooves 241 arranged along the first direction, along the first direction, at least one clamping member 22 being provided on each opposite side of the spacer, the clamping member 22 being installed in the first installation groove 241, and a sample clamping space being formed between the spacer and the clamping member 22.

[0026] In this embodiment, the spacer is installed in the mounting channel 24 and divides the mounting channel 24 into two first mounting slots 241. At least one clamping member 22 is provided in each of the two first mounting slots 241. The clamping member 22 and the spacer form a sample clamping space, which can clamp the sample so that even when the sample holder 20 and the sample rod 10 resonate, the sample will not slip off the sample holder 20.

[0027] In one embodiment, the spacer is a plate structure, and the spacer and the main body 21 are either an integral structure or a separate structure.

[0028] In one embodiment, along the first direction, adhesive layers (formed by coating adhesive on the surface of the spacer) are provided on both opposite sides of the spacer, and adhesive layers (formed by coating adhesive on the surface of the clamping member 22) are provided on the side of the clamping member 22 facing the spacer. This can more firmly fix the sample and prevent the sample from slipping off the sample holder during vibration.

[0029] In one embodiment, the clamping member 22 is a plate structure.

[0030] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the main body 21 is provided with an installation channel 24 that runs through the main body 21 in a first direction, and the clamping member 22 is installed in the installation channel 24.

[0031] The above settings not only enable the installation of the clamping component 22, but also reduce the interference of the external environment on the clamping component 22, such as preventing dust from falling on the clamping component 22.

[0032] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the end of the sample rod 10 is provided with a connecting structure 30, the connecting structure 30 having a second mounting groove 33, and the sample seat 20 is installed in the second mounting groove 33.

[0033] In this embodiment, the sample holder 20 can be installed by providing a second mounting groove 33 at the end of the sample rod 10.

[0034] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the main body 21 is engaged with the connecting structure 30, the mounting channel 24 is connected to the second mounting groove 33, and the side wall of the second mounting groove 33 can press the clamping member 22 in the first direction.

[0035] In this embodiment, the installation process of the sample holder 20 is simplified by the snap-fit ​​engagement between the main body 21 and the connecting structure 30, allowing the sample holder 20 to be quickly and accurately fixed to the sample rod 10 without the need for complex tools. After the sample holder 20 is engaged in the second mounting groove 33, the side wall of the second mounting groove 33 can press the clamping member 22 in the first direction, thereby enabling the clamping member 22 to stably hold the sample and prevent the sample from slipping off the sample holder 20 during vibration.

[0036] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, there are two clamping members 22, which are arranged along the first direction and installed in the installation channel 24.

[0037] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the connecting structure 30 is U-shaped. The connecting structure 30 includes a connecting section 31 and two clamping sections 32 connected to the connecting section 31. The two clamping sections 32 form the sidewalls of the second mounting groove 33. The two clamping sections 32 are spaced apart at opposite ends of the connecting section 31 along a first direction. Along the first direction, the main body 21 has a first side and a second side arranged opposite to each other. A slot 23 is provided on both the first side and the second side of the main body 21. The slot 23 extends in the vertical direction. The two clamping sections 32 are arranged in a one-to-one correspondence with the two slots 23. The clamping sections 32 are engaged in the corresponding slots 23.

[0038] In this embodiment, the sample holder 20 and the sample rod 10 can be connected by the snap-fit ​​engagement between the clamping section 32 in the connecting structure 30 and the slot 23 on the main body 21. The clamping section 32 of the connecting structure 30 is snapped into the slot 23 of the main body 21. This snap-fit ​​engagement simplifies the installation process of the sample holder 20, allowing the operator to complete the installation without additional tools, and also enabling quick disassembly when necessary. When the clamping section 32 is snapped into the slot 23, it applies a clamping force to the corresponding clamping member 22 in the first direction, maintaining the stability of the sample and thus improving the effectiveness and stability of sample fixation.

[0039] In one embodiment, a buckle is provided at the end of the clamping section 32 away from the connecting section 31. When the clamping section 32 is engaged in the slot 23, the buckle limits the main body 21 to further improve the effectiveness and stability of sample fixation.

[0040] In one embodiment of this utility model, a beam reflection structure is provided on the connecting structure 30.

[0041] In this embodiment, a beam reflection structure is provided on the connecting structure 30, which allows the beam reflection structure to vibrate under the vibration of the sample, thereby facilitating the detection of sample vibration through the beam. When performing alternating gradient magnetic measurement on the sample, the sample is clamped and fixed on the sample holder 20, and the sample is placed in an alternating magnetic field environment. The interaction between the sample's own magnetism and the alternating magnetic field environment can cause the sample to vibrate, further driving the sample holder 20 and sample rod 10 to vibrate, which in turn drives the beam reflection structure to vibrate. Thus, the beam reflection structure can interact with an external device that uses light to measure vibration and detect the vibration of the beam reflection structure, thereby knowing the vibration state of the sample and further calculating the force on the test object in the magnetic field, thereby performing magnetic characterization and realizing the detection of the sample's magnetism.

[0042] In one embodiment, the beam reflecting structure includes at least one of a reflector and a reflective film.

[0043] In one embodiment, the beam reflecting structure is mounted on the clamping section 32.

[0044] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the clamping structure further includes at least two elastic members 50 arranged at intervals along a first direction. The elastic members 50 are located between at least two clamping members 22 arranged opposite to each other and can clamp the sample under the pressing action of the clamping members 22.

[0045] In this embodiment, the elastic element 50 allows the clamping element 22 to have a certain elastic deformation capability when a clamping force is applied, ensuring that the sample is clamped evenly and firmly, reducing sample scattering or redistribution. At the same time, the buffering effect of the elastic element 50 can reduce sample damage during clamping, ensure the consistency of sample position and orientation during measurement or experimentation, and also avoid sample deformation or damage that may be caused by excessive local pressure.

[0046] like Figure 1 and Figure 2 As shown, in one embodiment of the present invention, there are three elastic elements 50, which are arranged sequentially along the first direction, and a sample clamping space is formed between two adjacent elastic elements 50.

[0047] In this embodiment, a sample clamping space can be formed between two adjacent elastic elements 50. Since the three elastic elements 50 are arranged sequentially along the first direction, it can ensure that the clamping force on the sample is more evenly distributed in this direction, preventing sample deformation or damage caused by excessive local force.

[0048] In one embodiment of this utility model, the thickness of the elastic element 50 ranges from 1μm to 50μm.

[0049] By adopting the above settings, it is possible to ensure effective fixation of the sample while avoiding the absorption of sample vibration by the elastic element 50 and avoiding interference with the vibration transmission of the sample.

[0050] In one embodiment, the elastic element 50 is a sheet structure made of polydimethylsiloxane.

[0051] like Figure 1 and Figure 2 As shown, in one embodiment of this utility model, the magnetic testing device further includes a first displacement stage 60, which is movably mounted on the mounting frame 80 in both the horizontal direction and the direction perpendicular to the paper surface. The end of the sample rod 10 furthest from the sample holder 20 is connected to the first displacement stage 60. With this configuration, the position of the sample rod 10 can be adaptively adjusted in the second direction.

[0052] In one embodiment, the clamping member 22 or the elastic member 50 is provided with an adhesive layer (formed by coating the surface of the clamping member with adhesive), which can further improve the fixation effect on the sample.

[0053] like Figure 2 As shown, in one embodiment of this utility model, the magnetic testing device further includes a second displacement stage 70, a mounting frame 80, two gradient coils 90, two bias coils 100, a coil fixing device 200, and a laser vibrometer 300. The laser vibrometer 300 is mounted on the second displacement stage 70, which facilitates the adjustment of the position of the laser vibrometer 300 to ensure better detection results. The first displacement stage 60 is mounted on the mounting frame 80. The bias coils 100 are configured to generate a magnetic field with good uniformity at the sample location on the sample holder 20. The gradient coils 90 are configured to generate a gradient magnetic field at the location of the sample clamped and fixed on the sample holder 20. The magnetic fields generated by the bias coils 100 and the gradient coils 90 together serve as the magnetic field environment for the AGM.

[0054] Two bias coils 100 are positioned opposite each other with a gap, and two gradient coils 90 are also positioned opposite each other with a gap. The sample holder 20 is positioned within the aforementioned gap. A coil fixing device 200 is used to fix the bias coils 100 and gradient coils 90. The end face of the bias coil 100 away from the sample holder 20 is fixed to the coil fixing device 200, and the end face of the gradient coil 90 away from the sample holder 20 is also fixed to the coil fixing device 200. The coil fixing device 200 can be a magnetic yoke to provide magnetic guidance while fixing the coils, thereby optimizing and adjusting the magnetic field generated by the magnetic field generator. Light emitted from the laser vibrometer 300 illuminates the beam reflecting structure, and the light reflected from the beam reflecting structure illuminates the receiving port of the laser vibrometer 300. This allows the laser vibrometer 300 to detect the vibration of the beam reflecting structure, thereby determining the vibration and stress conditions of the sample.

[0055] As described above, the sample holder is used to fix the sample and install it at the end of the sample rod. Under the action of gradient magnetic field and alternating magnetic field, the vibration of the sample rod is detected by laser vibrometer, thereby analyzing the magnetic properties of the sample, such as plotting the hysteresis loop of the powder sample.

[0056] It should be noted that the first displacement stage 60 and the second displacement stage 70 can be electric or manual displacement stages using existing technology, and the specific structure will not be described in detail here.

[0057] As can be seen from the above description, the above embodiments of this utility model achieve the following technical effects: a sample rod and a sample holder are provided. The sample holder includes a main body and a clamping structure mounted on the main body. The clamping structure includes at least two clamping members arranged opposite to each other along a first direction. A sample clamping space is formed between the at least two clamping members arranged opposite to each other. The clamping members can clamp the sample tightly so that the sample will not slip off the sample holder.

[0058] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0059] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A magnetic testing device, characterized by, include: Mounting bracket (80); A sample fixing structure is installed on the mounting bracket (80). The sample fixing structure includes a sample rod (10) and a sample seat (20). The sample seat (20) is connected to the sample rod (10). The sample seat (20) includes a main body (21) and a clamping structure installed on the main body (21). The clamping structure includes at least two clamping members (22) arranged opposite to each other along a first direction. A sample clamping space is formed between the at least two clamping members (22) arranged opposite to each other.

2. The magnetic testing device of claim 1, wherein, The main body (21) is provided with an installation channel (24) that runs through the main body (21) along the first direction, and the clamping member (22) is installed in the installation channel (24).

3. The magnetic testing device of claim 2, wherein, The sample rod (10) is provided with a connecting structure (30) at its end. The connecting structure (30) has a second mounting groove (33), and the sample holder (20) is installed in the second mounting groove (33).

4. The magnetic testing device of claim 3, wherein, The main body (21) is engaged with the connecting structure (30), the mounting channel (24) is connected to the second mounting groove (33), and the side wall of the second mounting groove (33) can press the clamping member (22) in the first direction.

5. The magnetic testing device of claim 4, wherein, The connecting structure (30) is U-shaped. The connecting structure (30) includes a connecting section (31) and two clamping sections (32) connected to the connecting section (31). The two clamping sections (32) form the sidewall of the second mounting groove (33). The two clamping sections (32) are spaced apart at opposite ends of the connecting section (31) along the first direction. Along the first direction, the main body (21) has a first side and a second side that are arranged opposite to each other. The first side and the second side of the main body (21) are each provided with a slot (23). The slot (23) extends in the vertical direction. The two clamping sections (32) are arranged one-to-one with the two slots (23). The clamping section (32) is engaged in the corresponding slot (23).

6. The magnetic testing device of any one of claims 3 to 5, wherein, A beam reflection structure is provided on the connection structure (30).

7. The magnetic testing device of any one of claims 1 to 5, wherein, The clamping structure further includes at least two elastic elements (50) spaced apart along a first direction. The elastic elements (50) are located between the at least two clamping elements (22) arranged opposite to each other and are able to clamp the sample under the pressing action of the clamping elements (22).

8. The magnetic testing device of claim 7, wherein, There are three elastic elements (50), which are arranged sequentially along the first direction, and the sample clamping space is formed between two adjacent elastic elements (50).

9. The magnetic testing device of claim 7, wherein, The thickness of the elastic element (50) ranges from 1 μm to 50 μm.

10. A magnetic testing device, characterized by include: Mounting bracket (80); A sample fixing structure is installed on the mounting frame (80). The sample fixing structure includes a sample rod (10) and a sample seat (20). The sample seat (20) is connected to the sample rod (10). The sample seat (20) includes a main body (21) and a clamping structure. The clamping structure includes at least two clamping members (22). The main body (21) is provided with an installation channel (24) that runs through the main body (21) along a first direction. A spacer is provided in the installation channel (24). The spacer divides the installation channel (24) into two first installation slots (241) arranged along the first direction. Along the first direction, at least one clamping member (22) is provided on each of the opposite sides of the spacer. The clamping member (22) is installed in the first installation slot (241), and a sample clamping space is formed between the spacer and the clamping member (22).

Images