Coil fixing device for measuring magnetic field of magnet

Abstract

The present application relates to the field of magnetic field measurement technology, and discloses a coil fixing device for measuring magnetic field of a magnet, including a guide frame for connecting with a linear motion mechanism; a coil support with a flat plate structure, one side of the coil support is used to install the coil, and the other side of the coil support is fixed to the end of the guide frame; a fine adjustment mechanism, the fine adjustment mechanism includes a differential adjustment device symmetrically distributed with respect to the forward direction of the linear motion mechanism, the differential adjustment device is fixed on the guide frame, and the moving end of the differential adjustment device is connected to the coil support through a cable. The tension of the cable is controlled by adjusting the position of the moving end, thereby adjusting the deflection of the coil support in the direction of gravity.

Description

Technical Field

[0001] The present invention generally relates to the technical field of magnetic field measurement, and in particular to a coil fixing device for measuring the magnetic field of a magnet. Background Art

[0002] The long coil magnetic field integral measurement device has a wide coil, which is fixed on a linear motion mechanism through a coil bracket. The linear motion mechanism moves at a constant speed in a direction perpendicular to the width of the coil, so that the bracket with the coil fixed enters the air gap of the magnet, which is used to measure the magnetic field inside the air gap of the accelerator magnet.

[0003] The magnetic field width inside the air gap of the accelerator magnet (corresponding to the width of the coil) is large, but the height and length (corresponding to the cross-sectional area of ​​the coil) are small. Therefore, the coil and its bracket also need to maintain a larger width and a smaller cross-section. This makes the coil and the bracket have a larger deflection in the direction of gravity, which makes it easy for the coil and its bracket to collide with the magnet. At the same time, it also affects the effective area of ​​the coil in the magnetic field, thereby causing measurement errors.

[0004] The existing long coil bracket is generally a three-rod or rod-shaped structure arranged in a "π" shape, in which the coil is fixed on the horizontal bar of the "π" and fixed to the linear motion mechanism through two rods or rods perpendicular to it. The method to reduce the deflection of the bracket and coil is basically to directly increase the diameter of the rod or rod. However, if the length and height of the magnet air gap are small, the diameter of the rod or rod of the bracket is limited, which increases the deflection of the bracket and coil. Summary of the invention

[0005] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a coil fixing device for measuring the magnetic field of a magnet.

[0006] The present invention provides a coil fixing device for measuring the magnetic field of a magnet, comprising: a guide frame for connecting with a linear motion mechanism; a coil bracket with a flat plate structure, one side of the coil bracket is used to install the coil, and the other side of the coil bracket is fixed to the end of the guide frame; a fine adjustment mechanism, the fine adjustment mechanism comprises a differential adjustment device symmetrically distributed with respect to the forward direction of the linear motion mechanism, the differential adjustment device is fixed on the guide frame, and the moving end of the differential adjustment device is connected to the coil bracket through a pull wire.

[0007] In one embodiment, the guide frame comprises a direction adjustment mechanism, which can make the extension direction of the coil perpendicular to the advancement direction of the coil.

[0008] In one embodiment, the direction adjustment mechanism includes two bases that overlap each other and can rotate relative to each other. The upper base is away from the side of the coil bracket, retracted toward the side close to the coil bracket, and exposes a portion of the surface of the lower base. The partial surface is provided with a direction adjustment device symmetrically distributed about the forward direction of the linear motion mechanism. The direction adjustment device includes an adjustment base and an adjustment shaft. The adjustment base is fixed on the lower base, and the adjustment shaft passes through the adjustment base and is pressed against the side of the upper base.

[0009] In one embodiment, the guide frame also includes a coarse adjustment device for horizontality, which is arranged on the direction adjustment mechanism. The coarse adjustment device for horizontality includes a connecting bracket connected to the side of the coil bracket away from the coil, and an adjusting member passes through the connecting bracket and is tightly pressed against the top of the upper base.

[0010] In one embodiment, the connecting bracket includes two connecting brackets symmetrically distributed about the forward direction of the linear motion mechanism, and the two connecting brackets are positioned and fixed to the coil bracket through their respective backrests, wherein the rib of one of the connecting brackets is flush with one end of the coil bracket, and the rib of the other connecting bracket is flush with the other end of the coil bracket.

[0011] In one embodiment, a plurality of wire pulling seats corresponding to the movable end are provided along the extension direction of the coil support, the movable end and its corresponding wire pulling seat are connected by a wire, each of the differential adjustment devices is connected to the guide frame, and the wire pulling seats are symmetrically distributed with respect to the forward direction of the linear motion mechanism.

[0012] In one embodiment, the differential adjustment device includes a differential adjustment base and a differential threaded shaft, the movable end is configured to be a differential block slidably connected to the differential adjustment base, and the two sides of the differential block are provided with a differential threaded seat and a differential support seat fixed to the differential adjustment base, the differential threaded shaft passes through the differential threaded seat, the differential block and the differential support seat, the differential threaded shaft includes a first threaded segment cooperating with the differential threaded seat, a second threaded segment cooperating with the differential block, and an optical axis segment cooperating with the differential support seat, the major diameter of the second threaded segment is smaller than the major diameter of the first threaded segment, and the outer diameter of the optical axis segment is smaller than the major diameter of the second threaded segment.

[0013] In one embodiment, the differential adjustment base of each differential adjustment device is provided with a guide groove, a guide block adapted to the width of the guide groove is provided under the differential block, the guide block is arranged in the guide groove, and the direction of the guide groove coincides with the projection of the pull wire.

[0014] In one embodiment, a weight-reducing groove is provided on the coil bracket, a coil groove for connecting with the coil is provided on the side of the coil bracket away from the guide frame, and the wire pull seat is detachably connected to the coil bracket or integrally formed on the coil bracket.

[0015] In one embodiment, the upper base is provided with first strip holes on both sides parallel to the forward direction of the linear motion mechanism, and the upper base and the lower base are fixed by fasteners passing through the first strip holes, and the width of the first strip holes is greater than the size of the fasteners; the differential adjustment base is evenly distributed with second strip holes along the circumferential direction, and the differential adjustment base is fixed to the upper base by fasteners passing through the second strip holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides a coil fixing device for measuring magnetic field of a magnet, comprising a guide frame for connecting with a linear motion mechanism; a coil support of a flat plate structure, one side of the coil support is used to install the coil, and the other side of the coil support is fixed to the end of the guide frame; a fine adjustment mechanism, the fine adjustment mechanism comprises a differential adjustment device symmetrically distributed with respect to the forward direction of the linear motion mechanism, the differential adjustment device is fixed on the guide frame, and the moving end of the differential adjustment device is connected to the coil support through a cable. The tension of the cable is controlled by adjusting the position of the moving end, thereby adjusting the deflection of the coil support in the direction of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 A three-dimensional structural diagram of a coil fixing device for measuring a magnet magnetic field according to an embodiment of the present application is shown;

[0020] Figure 2 A three-dimensional structural diagram of a direction adjustment mechanism according to an embodiment of the present application is shown;

[0021] Figure 3 A three-dimensional structural diagram of a levelness coarse adjustment device and a coil support involved in an embodiment of the present application is shown;

[0022] Figure 4 A three-dimensional structural diagram of a guide frame and a coil support according to an embodiment of the present application is shown;

[0023] Figure 5 A cross-sectional view of a differential adjustment device according to an embodiment of the present application is shown;

[0024] Figure 6A three-dimensional structural diagram of a differential adjustment device involved in an embodiment of the present application is shown.

[0025] In the figure: 1-direction adjustment mechanism, 11-upper base, 111-first strip hole, 112-fixing screw hole, 12-lower base, 13-pin, 14-direction adjustment device, 141-adjustment base, 142-adjustment shaft, 15-screw, 2-level coarse adjustment device, 21-connecting bracket, 211-backrest, 212-rib plate, 213-adjustment screw, 214-fixing screw, 3-differential adjustment device , 31-differential adjustment base, 311-guide groove, 312-second strip hole, 32-differential block, 321-guide block, 33-differential threaded seat, 34-differential support seat, 35-differential threaded shaft, 351-first thread segment, 352-second thread segment, 353-optical axis segment, 4-coil bracket, 41-coil groove, 42-weight reduction groove, 5-wire seat, 6-wire, 7-coil, 8-linear motion structure. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] The height and length of the magnetic field corresponding to the horizontal area of ​​the coil are very small, so the coil and its bracket also need to maintain a small cross-section, which makes the coil and the bracket deflect more in the direction of gravity, making it easy for the coil and its bracket to collide with the magnet. At the same time, it also affects the effective area of ​​the coil in the magnetic field, thus causing measurement errors.

[0029] In order to reduce the deflection of the coil and the bracket in the direction of gravity, the present application provides a coil fixing device for measuring the magnetic field of a magnet. Figures 1 to 6 The coil fixing device for measuring the magnetic field of a magnet provided by the present application is shown.

[0030] like Figure 1As shown, a coil fixing device for measuring a magnetic field of a magnet comprises: a guide frame for connecting to a linear motion mechanism; a coil bracket 4 of a flat plate-like structure, one side of the coil bracket 4 is used to install the coil, and the other side of the coil bracket 4 is fixed to the end of the guide frame; a fine adjustment mechanism, the fine adjustment mechanism comprises a differential adjustment device 3 symmetrically distributed with respect to the forward direction of the linear motion mechanism, the differential adjustment device 3 is fixed to the guide frame, and the moving end of the differential adjustment device 3 is connected to the coil bracket 4 via a pull wire 6.

[0031] It should be noted that the guide frame is fixedly connected to the linear motion mechanism, and the linear motion mechanism can be set as a linear motion mechanism guided by two guide rails and driven by a spiral screw. The linear motion mechanism does not involve the core content of the present invention and belongs to common knowledge, so its details are not repeated. The coil bracket 4 is fixed to the end of the guide frame. The significance of setting the coil bracket 4 as a flat plate structure is that it can extend into the air gap of the magnet with a smaller cross-section. The coil bracket 4 is provided with a coil groove for connecting to the coil on the side away from the guide frame. The extension direction of the coil groove 41 is parallel to the width direction of the coil and perpendicular to the forward direction of the linear motion mechanism. The coil is a long strip object with a width equal to that of the coil bracket 4 and is embedded in the coil groove 41. In addition, the coil bracket 4 is provided with a weight reduction groove 42.

[0032] The guide frame includes a direction adjustment mechanism 1, and the direction adjustment mechanism 1 can make the extension direction of the coil perpendicular to the forward direction of the coil. Specifically, the direction adjustment mechanism 1 includes two bases that overlap each other and can rotate relative to each other. The upper base 11 is away from the side of the coil support 4, retracted to the side close to the coil support 4, and exposes part of the surface of the lower base 12. The partial surface is provided with a direction adjustment device 14 symmetrically distributed about the forward direction of the linear motion mechanism. The direction adjustment device 14 includes an adjustment base 141 and an adjustment shaft 142. The adjustment base 141 is fixed on the lower base 12, and the adjustment shaft 142 passes through the adjustment base 141 and is pressed against the side of the upper base 11. It should be noted that the extension direction of the above-mentioned coil refers to the width direction of the coil.

[0033] One possible implementation is that the adjustment shaft 142 has an external thread, which can be screwed into the screw hole at the end of the adjustment base 141 and pressed against the side of the upper base 11. By controlling the screwing amount of the adjustment shaft 142 in the screw hole, the distance between the adjustment shaft 142 and the side of the upper base 11 is changed.

[0034] Another possible implementation is: an elastic clamping part is provided on the adjustment shaft 142, a through hole is provided on the adjustment base 141, and a clamping tooth matched with the elastic clamping part is provided on the inner wall of the through hole. When the elastic clamping part is tightened, it moves in the through hole without contacting the clamping tooth. When the elastic clamping part is restored, it is clamped between two adjacent clamping teeth. The extension amount of the adjustment shaft 142 in the through hole is adjusted to change the distance between the adjustment shaft 142 and the side surface of the upper base 11.

[0035] like Figure 2 As shown, the upper base 11 is connected to the lower base 12 by a pin 13, so the upper base 11 can rotate around the lower base 12. Figure 1 , Figure 3 As shown, there are two direction adjustment devices 14 on the lower base 12. By screwing in and out the adjustment shafts 142 on the two direction adjustment devices 14, the width direction of the adjustment coil 7 can be made perpendicular to the forward direction of the linear motion mechanism 8. When the adjustment shaft 142 of the right direction adjustment device 14 is screwed in clockwise and the adjustment shaft 142 of the left direction adjustment device 14 is screwed out counterclockwise, the upper base 11 rotates counterclockwise around the axis of the pin 13 on the lower base 12. When the operation of the two direction adjustment devices 14 is opposite to the above operation, the upper base 11 rotates clockwise around the axis of the pin 13 on the lower base 12.

[0036] The screws 15 of the upper base 11 pass through the first strip holes 111 on both sides of the upper base 11 and are screwed into the lower base 12 to fasten the upper base 11 to the lower base 12. The width of the first strip holes 111 is slightly larger than the major diameter of the screws 15, so the angle adjustment of the upper base 11 on the lower base 12 will not affect the screwing of the screws 15 into the lower base 12.

[0037] like Figure 3 and Figure 4 As shown, the guide frame also includes a horizontal coarse adjustment device 2, which is arranged on the direction adjustment mechanism 1. The horizontal coarse adjustment device 2 includes a connecting bracket 21 connected to the side of the coil bracket 4 away from the coil, and an adjusting member passes through the connecting bracket 21 and is tightly pressed against the top of the upper base 11.

[0038] A specific implementation is listed below, for example: the adjustment member can be set as an adjustment screw 213 that is screwed into the connecting bracket 21 and tightly pressed against the top of the upper base 11, and the fixing member can be set as a fixing screw 214 that passes through the connecting bracket 21 and is screwed into the upper base 11. The connecting bracket 21 includes two connecting brackets 21 that are symmetrically distributed with respect to the forward direction of the linear motion mechanism, and the connecting bracket 21 includes a backrest 211, a rib plate 212, an adjustment screw 213, and an adjustment screw hole that cooperates with the adjustment screw 213. The two connecting brackets 21 are positioned and fixedly connected to the coil bracket 4 through their respective backrests 211, and the rib plate 212 of one of the connecting brackets 21 is flush with one end of the coil bracket 4, and the rib plate 212 of the other connecting bracket 21 is flush with the other end of the coil bracket 4, which is used to prevent the two ends of the coil bracket 4 from shaking.

[0039] The two connecting brackets 21 are symmetrical structures. The coil bracket 4 is fixed to the upper base 11 through the two connecting brackets 21. The horizontal angles of the two connecting brackets 21 on the upper base 11 can be roughly adjusted by screwing in and out the adjusting screws 213. The upper base 11 is provided with fixing screw holes 112, and the fixing screws 214 pass through the connecting brackets 21 and are tightened in the fixing screw holes 112, thereby fixing the connecting brackets 21 to the upper base 11. After the rough adjustment of the horizontal angle of the connecting bracket 21 by the adjusting screws 213 is completed, the connecting bracket 21 is fixedly connected to the upper base 11 by the fixing screws 214.

[0040] The coarse adjustment of the horizontal angle of the connecting bracket 21 is as follows: the amount of screwing of the adjusting screw 213 into the adjusting screw hole on the connecting bracket 21 can change the length of the adjusting screw 213 protruding from the lower surface of the connecting bracket 21, thereby adjusting the height of the connecting bracket 21 being lifted up on the upper base 11. The adjusting screw hole through which the adjusting screw 213 passes is on the connecting bracket 21. The more the adjusting screw 213 is screwed into the adjusting screw hole on the connecting bracket 21, the more the adjusting screw 213 protrudes from the lower surface of the connecting bracket 21, that is, the more the adjusting screw 213 can lift the connecting bracket 21 on the upper base 11.

[0041] The adjusting screw 213 is preferably a right-handed external thread screw of M6X1. The number of the adjusting screws 213 can be one or more. When the adjusting screw 213 is a right-handed external thread screw of M6X1, the vertical movement distance of the adjusting screw 213 after one rotation is 1 mm, so the horizontal adjusting screw 213 is used in the horizontality coarse adjustment device 2 of the coil support 4.

[0042] In the field of magnetic measurement, the width of the coil 7 is very large, so the width of the coil bracket 4 is also large; but the lower base 12 and the upper base 11 are limited by the size of the linear motion structure 8, and their widths are smaller than the widths of the coil 7 and the coil bracket 4. Therefore, a rib 212 connecting the bracket 21 is flush with the right end of the coil bracket 4, and the rib 212 connecting the bracket 21 is flush with the left end of the coil bracket 4, which can prevent the left and right ends of the coil bracket 4 and the coil 7 from shaking or vibrating in the forward direction.

[0043] like Figure 5 and Figure 6 As shown, the differential adjustment device 3 includes a differential adjustment base 31 and a differential threaded shaft 35, the movable end is set to be a differential block 32 slidably connected to the differential adjustment base 31, and the two sides of the differential block 32 are provided with a differential threaded seat 33 and a differential support seat 34 fixed to the differential adjustment base 31, the differential threaded shaft 35 passes through the differential threaded seat 33, the differential block 32 and the differential support seat 34, the differential threaded shaft 35 includes a first thread segment 351 matched with the differential threaded seat 33, a second thread segment 352 matched with the differential block 32, and an optical axis segment 353 matched with the differential support seat 34, the major diameter of the second thread segment 352 is smaller than the major diameter of the first thread segment 351, and the outer diameter of the optical axis segment 353 is smaller than the major diameter of the second thread segment 352.

[0044] The first thread segment 351 is preferably an M8X1.25 thread with a lead of 1.25mm; the second thread segment 352 is preferably an M6X1 thread with a lead of 1mm; the outer diameter of the optical axis segment 353 is preferably φ5. The differential thread seat 33 has a first threaded hole that matches the first thread segment 351, preferably an M8 threaded hole; the differential support seat 34 has an optical hole that matches the optical axis segment 353 with a clearance, and the reference diameter is preferably φ5; the differential block 32 has a second threaded hole that matches the second thread segment 352, preferably an M6 threaded hole.

[0045] According to mechanical principles, when the differential threaded shaft 35 rotates one circle, the distance that the differential block 32 moves forward or backward is the lead difference between the first thread segment 351 and the second thread segment 352. For example, when the first thread segment 351 is an M8X1.25 thread and the second thread segment 352 is an M6X1 thread, after the differential threaded shaft 35 rotates one circle, the distance that the guide block 321 moves forward or backward is 0.25 mm.

[0046] The differential adjustment base 31 of each differential adjustment device 3 is provided with a guide groove 311, and a guide block 321 adapted to the width of the guide groove 311 is provided below the differential block 32. The guide block 321 can slide in the guide groove 311, and the direction of the guide groove 311 coincides with the projection of the pull wire 6.

[0047] A plurality of wire pull seats 5 corresponding to the moving end may be provided along the extension direction of the coil support 4 (i.e., the width direction of the coil), and the moving end and the corresponding wire pull seats 5 are connected by wires 6, so that each of the differential adjustment devices 3 is connected to the guide frame, and the wire pull seats 5 are symmetrically distributed with respect to the advancing direction of the linear motion mechanism. The number of the wire pull seats 5 is consistent with the number of the differential adjustment devices 3.

[0048] The wire pull seat 5 is detachably connected to the coil support 4 or is integrally formed on the coil support 4. Specifically, the wire pull seat 5 and the coil support 4 can be separate structures and connected with screws, or the wire pull seat 5 can be integrally processed on the coil support 4.

[0049] like Figure 1 As shown, the upper base 11 has three groups of differential adjustment devices 3. One of the differential adjustment devices 3 is located in the forward direction of the linear motion mechanism, and the other differential adjustment devices 3 are symmetrically distributed about the forward direction of the linear motion mechanism. At this time, the number of differential adjustment devices 3 can be 3, 5, 7, 9, etc.; the number of differential adjustment devices 3 can also be 2, 4, 6, 8, and at this time, all differential adjustment devices 3 are symmetrically distributed about the forward direction of the linear motion mechanism. The differential block 32 is connected to the wire seat 5 through the pull wire 6. The fixing structure of the pull wire 6, the differential block 32, and the wire seat 5 can be various tension wire fixing structures within the scope of mechanical common sense. The differential adjustment base 31 can be assembled and adjusted so that the direction of the guide groove 311 of the differential adjustment base 31 coincides with the projection of the pull wire 6.

[0050] Therefore, when the differential threaded shaft 35 is rotated, the tension and relaxation of the pull wire 6 can be controlled by moving the differential block 32 forward and backward, thereby adjusting the deflection of the coil support 4 in the gravity direction. Two pull wire seats 5 are located at both ends of the coil support 4, and one pull wire seat 5 is located at the central axis of the coil support 4. Therefore, by controlling the tension and relaxation of the pull wire 6, the coil support 4, that is, the straightness and horizontality of the coil 7 can also be adjusted.

[0051] In contrast, when the first thread segment 351 of the differential threaded shaft 35 is an M8X1.25 thread and the second thread segment 352 is an M6X1 thread, after the differential threaded shaft 35 rotates one circle, the forward or backward distance of the guide block 321 is 0.25 mm, so the differential threaded shaft 35 is used in the fine adjustment mechanism of the coil bracket 4.

[0052] The differential adjustment base 31 is evenly distributed with second strip holes 312 along the circumferential direction, and the differential adjustment base 31 is fixed to the upper base by fasteners passing through the second strip holes 312, so that assembly adjustment will not affect the screws fixing the differential adjustment base 31 to the upper base 11.

[0053] It should be noted that the connecting bracket 21, the coil bracket 4 and the wire pull seat 5 are all non-metallic materials, preferably the commonly used material G10 for magnetic measurement, which is a composite material of glass fiber and resin. Here, G represents glass fiber, and 10 means that the glass fiber contains 10%. The wire pull 6 is made of non-metallic material, preferably carbon fiber. According to the common sense of material mechanics, the bending stress of the coil bracket 4 is converted into the tensile stress of the wire pull 6, so the wire pull 6 can reduce the deflection of the coil bracket 4 and the coil 7.

[0054] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the aforementioned disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other to form a technical solution.

Claims

1. A coil fixing device for measuring magnetic field of a magnet, characterized in that: include: A guide frame for connecting with a linear motion mechanism; A coil support of a flat plate-like structure, one side of the coil support is used to mount the coil, the other side of the coil support is fixed to the end of the guide frame, and the coil support is made of non-metallic material; The fine adjustment mechanism comprises a differential adjustment device symmetrically distributed about the advancing direction of the linear motion mechanism, the differential adjustment device is fixed on the guide frame, and the moving end of the differential adjustment device is connected to the coil support through a pull wire. The differential adjustment device includes a differential adjustment base and a differential threaded shaft, the movable end is configured as a differential block slidably connected to the differential adjustment base, and differential threaded seats and differential support seats are provided on both sides of the differential block, and the differential threaded shaft passes through the differential threaded seat, the differential block and the differential support seat, and the differential threaded shaft includes a first threaded section matched with the differential threaded seat, a second threaded section matched with the differential block, and an optical axis section matched with the differential support seat, the major diameter of the second threaded section is smaller than the major diameter of the first threaded section, and the outer diameter of the optical axis section is smaller than the major diameter of the second threaded section. The differential adjustment base of each differential adjustment device is provided with a guide groove, and a guide block adapted to the width of the guide groove is provided below the differential block. The guide block is arranged in the guide groove, and the direction of the guide groove coincides with the projection of the pull wire.

2. The coil fixing device for measuring the magnetic field of a magnet according to claim 1, characterized in that: The guide frame includes a direction adjustment mechanism, which can make the extension direction of the coil perpendicular to the forward direction of the coil.

3. The coil fixing device for measuring the magnetic field of a magnet according to claim 2, characterized in that: The direction adjustment mechanism includes two bases that overlap each other and can rotate relative to each other. The upper base is away from the side of the coil bracket, retracted toward the side close to the coil bracket, and exposes a portion of the surface of the lower base. The partial surface is provided with direction adjustment devices symmetrically distributed about the forward direction of the linear motion mechanism. The direction adjustment device includes an adjustment base and an adjustment shaft. The adjustment base is fixed on the lower base, and the adjustment shaft passes through the adjustment base and is pressed against the side of the upper base.

4. The coil fixing device for measuring the magnetic field of a magnet according to claim 3, characterized in that: The guide frame also includes a coarse adjustment device for horizontality, which is arranged on the direction adjustment mechanism. The coarse adjustment device for horizontality includes a connecting bracket connected to the side of the coil bracket away from the coil, and an adjusting member passes through the connecting bracket and is tightly pressed against the top of the upper base.

5. The coil fixing device for measuring the magnetic field of a magnet according to claim 4, characterized in that: The connecting bracket includes two connecting brackets symmetrically distributed with respect to the forward direction of the linear motion mechanism. The two connecting brackets are positioned and fixedly connected to the coil bracket by their respective backrests. The ribs of one of the connecting brackets are flush with one end of the coil bracket, and the ribs of the other connecting bracket are flush with the other end of the coil bracket.

6. The coil fixing device for measuring the magnetic field of a magnet according to claim 3, characterized in that: A plurality of wire drawing seats corresponding to the movable end are provided along the extension direction of the coil support, the movable end and its corresponding wire drawing seats are connected by wire drawing, each of the differential adjustment devices is connected to the guide frame, and the wire drawing seats are symmetrically distributed with respect to the forward direction of the linear motion mechanism.

7. The coil fixing device for measuring the magnetic field of a magnet according to claim 6, characterized in that: The coil bracket is provided with a weight-reducing groove, and a coil groove for connecting with the coil is provided on a side of the coil bracket away from the guide frame. The wire pull seat is detachably connected to the coil bracket or is integrally formed on the coil bracket.

8. The coil fixing device for measuring the magnetic field of a magnet according to claim 7, characterized in that: The upper base is provided with first strip holes on both sides parallel to the forward direction of the linear motion mechanism, and the upper base and the lower base are fixed by fasteners passing through the first strip holes, and the width of the first strip holes is greater than the size of the fasteners; the differential adjustment base is evenly distributed with second strip holes along the circumferential direction, and the differential adjustment base is fixed to the upper base by fasteners passing through the second strip holes.

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