AMR linear sensor based on coil bias

Abstract

The utility model relates to the technical field of linear current sensors, and particularly discloses an AMR linear sensor based on coil bias, which comprises a linear sensor body and a mounting seat, the lower end of the mounting seat is symmetrically provided with connecting mechanisms, the inner side of the upper end of the mounting seat is provided with an abutting mechanism, the upper end of the mounting seat is symmetrically provided with mounting mechanisms, and the lower end of the mounting seat is provided with a clamping mechanism. Fixing grooves are symmetrically formed in the lower end of the linear sensor body, and clamping grooves are formed in the inner sides of the fixing grooves. During installation on a guide rail, on the basis that the guide rail is limited by a connecting mechanism, a screw rod at a supporting plate is rotated by a rotating block at the upper end of an installation base to rotate, and a square plate in threaded connection with the outer side slides on the inner side of a square groove due to rotation of the screw rod; the downward sliding of the square plate drives the abutting rod to extend into the groove of the installation base in a sliding mode to abut against the guide rail, the installation base can be prevented from moving on the guide rail, and therefore the installation base and the guide rail can be combined and installed conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of linear current sensors, in particular to an AMR linear sensor based on coil bias. Background Art

[0002] The main function of the current sensor is to measure the current of the energized wire. The simplest way is to directly measure the voltage across the resistor in the energized circuit and deduce the current of the circuit. However, with the progress of society, the current in the energized circuit is getting larger and larger. It is no longer possible to use the method of measuring the voltage across the resistor to deduce the current in the circuit, because the larger the current, the more intense the resistance heats up, which is highly dangerous, especially in places where large currents such as the power supply current of new energy vehicles and the working current point of charging piles are measured. This method has been gradually abandoned. Instead, it is replaced by measuring the magnitude of the magnetic induction intensity generated by the energized straight wire to deduce the magnitude of the current. There are mainly Hall sensors, TMR sensors, and AMR sensors. Hall sensors have an ultra-wide measurement range. At present, AMR sensors mainly use Barber electrodes to generate an equivalent bias field and offset the current by 45° relative to the easy magnetization axis to generate a linear output. The magnetic induction intensity range that can be measured by this method is approximately between ±20Gauss, and the corresponding current is approximately between ±50A, which is mainly related to the saturation magnetization of Permalloy. And the larger the measurement range, the lower the sensitivity.

[0003] A Chinese patent with publication number CN209878858U discloses a Hall sensor, comprising a base and an induction ring detachably connected to the base, wherein the base is U-shaped with its opening facing the induction ring, and an induction coil is arranged inside the induction ring; a plug-in block is arranged on the outer circumferential surface of the induction ring; a plug-in hole is arranged on the base to cooperate with the plug-in block; connecting holes are arranged on the opposite side walls of the plug-in hole, an action rod is arranged in the connecting hole, and a through hole is arranged on the plug-in block to cooperate with the action rod; one end of the action rod away from the plug-in hole abuts against an insertion rod vertically inserted on the base, and one end of the action rod away from the insertion rod is sleeved with a first spring; one end of the insertion rod close to the action rod is wedge-shaped, and the wedge-shaped end face of the insertion rod faces the action rod.

[0004] Through the above-mentioned prior art, it can be understood that there are still certain deficiencies in the actual use of linear current sensors. For example, when the current sensor is installed on the guide rail in the electrical cabinet, although the elastic limit blocks symmetrically arranged at the sliding holes can facilitate the installation of the current sensor on the guide rail, the current sensor installed on the guide rail is not stable and is easy to move on the guide rail, thereby affecting the installation effect.

[0005] To this end, we propose an AMR linear sensor based on coil bias to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide an AMR linear sensor based on coil bias to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides an AMR linear sensor based on coil bias, comprising a linear sensor body and a mounting seat, a connecting mechanism is symmetrically provided at the lower end of the mounting seat, a fixing mechanism is provided on the inner side of the upper end of the mounting seat, a mounting mechanism is symmetrically provided on the upper end of the mounting seat, a fixing groove is symmetrically provided at the lower end of the linear sensor body, a clamping groove is provided on the inner side of the fixing groove, and the mounting seat is clamped with the clamping groove through the mounting mechanism;

[0008] The connecting mechanism includes an assembly groove, which is symmetrically arranged at the lower end of the mounting seat, a moving plate is slidably connected to the inner side of the assembly groove, a second clamping block is fixedly connected to the opposite side of the moving plate, a U rod is fixedly connected to the side of the moving plate away from the second clamping block, the end of the U rod slides through the wall of the assembly groove, and a second spring is sleeved on the outer side of one end of the U rod close to the moving plate. Through the connecting mechanism on the mounting seat, the groove part at the lower end of the mounting seat can be quickly clamped on the guide rail;

[0009] The fixing mechanism includes a square groove, which is arranged at the upper end of the mounting seat, a support plate is fixedly installed on the inner side of the square groove, the support plate and the opposite side of the square groove are rotatably connected with the same screw, the upper end of the screw is rotatably penetrated through the support plate and a rotating block is fixedly installed, the outer side of the screw is threadedly connected with a square plate, the square plate is slidably connected to the inner side of the square groove, and a pressing rod is symmetrically fixedly connected to the lower end of the square plate, and one end of the pressing rod away from the square plate slides through the wall of the square groove, and through the fixing mechanism on the inner side of the mounting seat, it is convenient to press the guide rail on the mounting seat to prevent movement on the basis of the connection mechanism;

[0010] The mounting mechanism includes a movable groove, which is symmetrically arranged at the upper end of the mounting seat, a sliding rod is symmetrically fixedly installed on the inner side of the movable groove, a first clamping block is slidably connected to the outer side of the sliding rod, a first spring is sleeved on the outer side of the sliding rod, a push block is fixedly connected to the side of the first clamping block away from the first spring, an end of the push block away from the first clamping block slides through the wall of the movable groove, and the clamping end of the first clamping block movably extends into the inner side of the fixed groove and is clamped in the clamping groove, and the linear sensor body can be quickly disassembled and assembled for use through the mounting mechanism at the upper end of the mounting seat.

[0011] In a further embodiment, a second sliding groove is symmetrically opened on the inner side of the assembly groove, and the end of the moving plate is slidably connected to the inner side of the second sliding groove. The second sliding groove on the inner side of the assembly groove can facilitate the sliding of the moving plate on the inner side of the assembly groove.

[0012] In a further embodiment, a first sliding groove is symmetrically opened on the inner side of the square groove, the end of the square plate is slidably connected to the inner side of the first sliding groove, and the end of the pressure rod away from the square plate is arranged directly above the second blocking block. By opening the first sliding groove on the inner side of the square groove, the square plate can be easily slid inside the square groove.

[0013] In a further embodiment, a circular groove is provided at the lower end of the linear sensor body, and the circular groove is provided directly above the rotary block. By providing a circular groove at the lower end of the linear sensor body, the linear sensor body can be conveniently connected and fixed to the mounting seat so that the rotary block is placed in the circular groove.

[0014] In a further embodiment, a positioning groove is symmetrically provided at the lower end of the linear sensor body, and a positioning block is symmetrically fixedly installed at the upper end of the mounting seat. The positioning block and the positioning groove are plug-in connected. The positioning groove provided at the lower end of the linear sensor body is plugged into the positioning block on the mounting seat, so that the mounting seat and the linear sensor body can be conveniently positioned and plugged.

[0015] In a further embodiment, a spring groove is symmetrically opened on one side of the inner wall of the movable groove, one end of the slide rod is fixedly installed on the inner side of the spring groove, and one end of the first spring is arranged on the inner side of the spring groove. By opening the spring groove on one side of the inner wall of the movable groove, the elastic deformation part of the first spring can be conveniently stored.

[0016] In a further embodiment, a limit groove is symmetrically provided on the outer side of the push block, a rectangular hole is provided on the inner side of the mounting seat, the rectangular hole and the movable groove are interconnected, and the push block is slidably connected to the inner wall of the limit groove and the rectangular hole. By symmetrically providing limit grooves on the outer side of the push block, the movable distance of the push block can be conveniently limited at the rectangular hole, thereby facilitating the operation and use of the push block.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] Firstly, in the utility model, when the linear sensor body needs to be installed on the guide rail for use, it only needs to be directly inserted into the guide rail through the groove at the lower end of the mounting seat. During the insertion process, the second clamping block on the mounting seat contacts the guide rail, so that the guide rail is squeezed along the inclined surface of the second clamping block, and at the same time, the moving plate connected to the second clamping block slides inside the assembly groove, and the sliding of the moving plate inside the assembly groove can compress the second spring outside the connected U rod. When the guide rail passes over the second clamping block, the second spring resets and pushes the second clamping block connected to the moving plate to limit the guide rail in the groove of the mounting seat. When the mounting seat needs to be disassembled and adjusted on the guide rail, the U rod is pulled at the same time, so that the moving plate connected to the U rod can drive the second clamping block to separate from the guide rail, and at this time, the mounting seat part can be conveniently removed from the guide rail.

[0019] Secondly, in the utility model, when the guide rail is installed on the guide rail, the screw at the support plate is rotated by using the rotary block at the upper end of the mounting seat to rotate, and the rotation of the screw makes the square plate connected with the outer thread slide inside the square groove. Since the lower end of the square plate is symmetrically equipped with a pressure rod, the downward movement of the square plate drives the pressure rod to slide into the groove of the mounting seat to tighten the guide rail, which can prevent the mounting seat from moving on the guide rail, thereby facilitating the combined installation of the mounting seat and the guide rail.

[0020] Thirdly, in the utility model, on the basis of fixing the mounting seat on the guide rail, it is only necessary to insert the linear sensor body into the mounting seat. During the insertion process, the fixed groove at the lower end of the linear sensor body squeezes the inclined surface of the first clamping block, and at the same time, the first clamping blocks approach each other and slide in the movable groove to compress the first spring. When the mounting seat and the linear sensor body are plugged in, and the snap-in end of the first clamping block corresponds to the position of the clamping slot in the fixed groove, the first spring resets and pushes the first clamping blocks away from each other, and makes the snap-in end of the first clamping block inserted into the clamping slot to fix it, so that the mounting seat and the linear sensor body can be quickly connected and installed conveniently. When the linear sensor body fails or is damaged and needs to be replaced or maintained, it is only necessary to squeeze the push blocks on both sides of the mounting seat at the same time to separate the first clamping block connected to the push block from the clamping slot in the fixed groove of the linear sensor body. At this time, the linear sensor body can be easily removed from the mounting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is an exploded view of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the fixing mechanism in the utility model;

[0024] Figure 4 For the utility model Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the bottom structure of the linear sensor body in the utility model;

[0026] Figure 6 For the utility model Figure 5 Enlarged view of point B in the middle;

[0027] Figure 7 This is a schematic diagram of the structure of the middle shift plate of the utility model;

[0028] Figure 8 It is a schematic diagram of the connecting mechanism structure in the utility model.

[0029] In the figure: 1, linear sensor body, 2, mounting seat, 3, mounting mechanism, 301, movable groove, 302, first clamping block, 303, push block, 304, slide rod, 305, first spring, 4, connecting mechanism, 401, assembly groove, 402, second spring, 403, U rod, 404, shift plate, 405, second clamping block, 5, fixing mechanism, 501, square groove, 502, support plate, 503, rotary block, 504, square plate, 505, pressing rod, 506, screw, 6, positioning block, 7, limiting groove, 8, spring groove, 9, first slide groove, 10, positioning groove, 11, circular groove, 12, fixed groove, 13, clamping groove, 14, second slide groove, 15, rectangular hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-Figure 8 In the embodiment of the utility model, an AMR linear sensor based on coil bias includes a linear sensor body 1 and a mounting seat 2, a connecting mechanism 4 is symmetrically provided at the lower end of the mounting seat 2, a fixing mechanism 5 is provided on the inner side of the upper end of the mounting seat 2, a mounting mechanism 3 is symmetrically provided on the upper end of the mounting seat 2, a fixing groove 12 is symmetrically provided at the lower end of the linear sensor body 1, a clamping groove 13 is provided on the inner side of the fixing groove 12, and the mounting seat 2 is clamped with the clamping groove 13 through the mounting mechanism 3; a fixing seat with a fixing hole is also provided on the mounting seat 2, so that the linear sensor body 1 is not only suitable for installation on the guide rail but also suitable for installation on an electrical cabinet with a galvanized plate bottom plate; the linear sensor body 1 also includes a Wheatstone bridge in the AMR linear sensor, which connects the AMR line The two groups of bridge lines on the Wheatstone bridge in the linear sensor are designed to be at an angle of 45° or 135° to the horizontal direction. The two groups of bridges below are symmetrically arranged with the two groups of bridges above. The magnetic sensitive film is covered on the AMR linear sensor and shaped, and a silicon nitride protective layer is first grown on the magnetic sensitive film, and then a layer of A1 electrode is grown on it and the pattern is photoetched. Barber electrode, permanent magnet bias or coil bias is used as the bias of the AMR linear sensor. The direction of the bias electrode is perpendicular to the direction of the measured magnetic field generated by the measured current. This structure increases the measurement range of the AMR sensor, solves the problem of low sensitivity of the Hall sensor, and solves the problem of narrow measurement range of the AMR sensor, greatly increasing the application field and scope of the AMR sensor;

[0032] The connecting mechanism 4 includes an assembly groove 401, which is symmetrically arranged at the lower end of the mounting seat 2. A shift plate 404 is slidably connected to the inner side of the assembly groove 401, and a second clamping block 405 is fixedly connected to the opposite side of the shift plate 404. A U-rod 403 is fixedly connected to the side of the shift plate 404 away from the second clamping block 405. The end of the U-rod 403 slides through the groove wall of the assembly groove 401, and a second spring 402 is sleeved on the outer side of the end of the U-rod 403 close to the shift plate 404. When the linear sensor body 1 needs to be installed on the guide rail for use, it only needs to be directly inserted into the guide rail through the groove at the lower end of the mounting seat 2. During the insertion process, the second clamping block 405 on the mounting seat 2 contacts the guide rail, so that the guide rail moves along The second clamping block 405 is squeezed by the inclined surface, and the moving plate 404 connected to the second clamping block 405 slides inside the assembly groove 401. The sliding of the moving plate 404 inside the assembly groove 401 can compress the second spring 402 outside the connected U rod 403. When the guide rail passes over the second clamping block 405, the second spring 402 returns to its original position and pushes the second clamping block 405 connected to the moving plate 404 to limit the guide rail in the groove of the mounting seat 2. When the mounting seat 2 needs to be disassembled and adjusted on the guide rail, the U rod 403 is pulled at the same time, so that the moving plate 404 connected to the U rod 403 can drive the second clamping block 405 to separate from the guide rail, and at this time, the mounting seat 2 can be conveniently removed from the guide rail.

[0033] The fixing mechanism 5 includes a square groove 501, which is opened at the upper end of the mounting seat 2. A support plate 502 is fixedly installed on the inner side of the square groove 501. The support plate 502 and the opposite side of the square groove 501 are rotatably connected with the same screw rod 506. The upper end of the screw rod 506 rotates through the support plate 502 and is fixedly installed with a rotating block 503. The outer side of the screw rod 506 is threadedly connected with a square plate 504. The square plate 504 is slidably connected to the inner side of the square groove 501. The lower end of the square plate 504 is symmetrically fixedly connected with a pressing rod 505. The end of the pressing rod 505 away from the square plate 504 slides through the wall of the square groove 501 and is installed on the guide rail. When installing, when the guide rail is limited on the basis of the connection mechanism 4, the screw 506 at the support plate 502 is rotated by using the rotary block 503 at the upper end of the mounting seat 2, and the rotation of the screw 506 makes the square plate 504 connected with the outer thread slide inside the square groove 501. Since the lower end of the square plate 504 is symmetrically installed with the pressing rod 505, the downward movement of the square plate 504 drives the pressing rod 505 to slide and extend into the groove of the mounting seat 2 to tighten the guide rail, and the mounting seat 2 can be prevented from moving on the guide rail; the pressing end of the pressing rod 505 is also provided with a rubber layer, and the rubber layer can increase friction and improve the stability of the pressing of the guide rail;

[0034] The mounting mechanism 3 includes a movable groove 301, which is symmetrically arranged at the upper end of the mounting seat 2. A sliding rod 304 is symmetrically fixedly installed on the inner side of the movable groove 301. A first clamping block 302 is slidably connected to the outer side of the sliding rod 304. A first spring 305 is sleeved on the outer side of the sliding rod 304. A push block 303 is fixedly connected to the side of the first clamping block 302 away from the first spring 305. The end of the push block 303 away from the first clamping block 302 slides through the groove wall of the movable groove 301. The clamping end of the first clamping block 302 is movably extended into the inner side of the fixed groove 12 and clamped with the clamping groove 13. On the basis of fixing the mounting seat 2 on the guide rail, it is only necessary to insert the linear sensor body 1 into the mounting seat 2. During the insertion process, the fixed groove 12 at the lower end of the linear sensor body is pressed against the inclined surface of the first clamping block 302. The first clamping blocks 302 are pressed together, and at the same time, the first clamping blocks 302 are moved close to each other and slide in the movable groove 301 to compress the first spring 305. When the mounting seat 2 and the linear sensor body 1 are plugged in, and the snap-in end of the first clamping block 302 corresponds to the position of the snap-in groove 13 in the fixed groove 12, the first spring 305 is reset to push the first clamping blocks 302 away from each other, and the snap-in end of the first clamping block 302 is inserted into the snap-in groove 13 to fix it. When the linear sensor body 1 fails or is damaged and needs to be replaced or maintained, it is only necessary to squeeze the push blocks 303 on both sides of the mounting seat 2 at the same time, so that the first clamping block 302 connected to the push block 303 is separated from the snap-in groove 13 in the fixed groove 12 of the linear sensor body 1. At this time, the linear sensor body 1 can be easily removed from the mounting seat 2.

[0035] See also Figure 8 A second slide groove 14 is symmetrically opened on the inner side of the assembly groove 401, and the end of the moving plate 404 is slidably connected to the inner side of the second slide groove 14. By sliding the moving plate 404 in the second slide groove 14 opened on the inner side of the assembly groove 401, the stability of the movement of the moving plate 404 can be guaranteed.

[0036] See also Figure 2 and Figure 5 A first slide groove 9 is symmetrically provided on the inner side of the square groove 501, and the end of the square plate 504 is slidably connected to the inner side of the first slide groove 9. The end of the pressure rod 505 away from the square plate 504 is arranged directly above the second block 405. A circular groove 11 is provided at the lower end of the linear sensor body 1, and the circular groove 11 is arranged directly above the rotary block 503. The square plate 504 is slid in the first slide groove 9 in the upper groove 501 of the mounting seat 2, so that the square plate 504 can move vertically inside the square groove 501, thereby ensuring the stability of the movement of the square plate 504; a straight hole suitable for the pressure rod 505 to slide into the groove of the mounting seat 2 is also provided on the inner side of the square groove 501, which can facilitate the pressure rod 505 to extend into the groove of the mounting seat 2 to tighten the guide rail.

[0037] See also Figure 3 and Figure 5The lower end of the linear sensor body 1 is symmetrically provided with a positioning groove 10, and the upper end of the mounting seat 2 is symmetrically fixed with a positioning block 6, and the positioning block 6 and the positioning groove 10 are plug-in connected. When the mounting seat 2 and the linear sensor body 1 are installed, the positioning groove 10 at the lower end of the linear sensor body 1 and the positioning block 6 at the upper end of the mounting seat 2 are used for positioning and plugging, so that the linear sensor body 1 and the mounting seat 2 can be conveniently connected and installed.

[0038] See also Figure 2 and Figure 3 The movable groove 301 has an inner wall symmetrically provided with an elastic groove 8, one end of the slide bar 304 is fixedly mounted on the inner side of the elastic groove 8, one end of the first spring 305 is arranged on the inner side of the elastic groove 8, and a limiting groove 7 is symmetrically provided on the outer side of the push block 303. A rectangular hole 15 is provided on the inner side of the mounting seat 2, and the rectangular hole 15 and the movable groove 301 are connected to each other. The push block 303 is slidably connected through the limiting groove 7 and the inner wall of the rectangular hole 15. The first clamping block 302 is moved to squeeze the first spring 305 on the inner side of the movable groove 301, so that the deformed part of one end of the first spring 305 is accommodated in the elastic groove 8. When the linear sensor body 1 and the mounting seat 2 are disassembled, the push block 303 is squeezed at the same time, and the push block 303 is limited at the limiting groove 7 and the rectangular hole 15, so that the push block 303 can quickly and easily drive the first clamping block 302 to separate from the clamping groove 13 of the linear sensor body 1, thereby facilitating the disassembly operation.

[0039] The working principle of the utility model is as follows: during use, when the linear sensor body 1 needs to be installed on the guide rail for use, it only needs to be directly inserted into the guide rail through the groove at the lower end of the mounting seat 2. During the insertion process, the second clamping block 405 on the mounting seat 2 contacts the guide rail, so that the guide rail is squeezed along the inclined surface of the second clamping block 405, and at the same time, the moving plate 404 connected to the second clamping block 405 slides inside the assembly groove 401, and the sliding of the moving plate 404 inside the assembly groove 401 can compress the second spring 402 outside the connected U rod 403. When the guide rail passes over the second clamping block 405, the second spring 40 The second clamping block 405 connected to the reset push plate 404 can limit the guide rail in the groove of the mounting seat 2. When the guide rail is limited on the basis of the connection mechanism 4, the screw 506 at the support plate 502 is rotated by using the rotary block 503 at the upper end of the mounting seat 2, and the rotation of the screw 506 makes the square plate 504 connected with the outer thread slide inside the square groove 501. Since the lower end of the square plate 504 is symmetrically installed with the pressing rod 505, the downward movement of the square plate 504 drives the pressing rod 505 to slide and extend into the groove of the mounting seat 2, so as to tighten the guide rail and prevent the mounting seat 2 from moving on the guide rail.

[0040] On the basis of fixing the mounting base 2 on the guide rail, it is only necessary to insert the linear sensor body 1 onto the mounting base 2. During the insertion process, the fixed groove 12 at the lower end of the linear sensor body squeezes the inclined surface of the first clamping block 302, and at the same time, the first clamping blocks 302 approach each other and slide in the movable groove 301 to compress the first spring 305. When the mounting base 2 and the linear sensor body 1 are plugged in, and the snap-in end of the first clamping block 302 corresponds to the position of the snap-in slot 13 in the fixed groove 12, the first spring 305 resets and pushes the first clamping blocks 302 away from each other, and makes the snap-in end of the first clamping block 302 inserted into the snap-in slot 13 to fix it. When the linear sensor body 1 fails or is damaged and needs to be replaced or maintained, it is only necessary to squeeze the push blocks 303 on both sides of the mounting base 2 at the same time, so that the first clamping block 302 connected to the push block 303 is separated from the snap-in slot 13 in the fixed groove 12 of the linear sensor body 1. At this time, the linear sensor body 1 can be easily removed from the mounting base 2.

[0041] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0042] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An AMR linear sensor based on coil bias, characterized in that: The linear sensor body and the mounting seat are included. The lower end of the mounting seat is symmetrically provided with a connecting mechanism, the inner side of the upper end of the mounting seat is provided with a fixing mechanism, the upper end of the mounting seat is symmetrically provided with a mounting mechanism, the lower end of the linear sensor body is symmetrically provided with a fixing groove, the inner side of the fixing groove is provided with a clamping groove, and the mounting seat is clamped with the mounting mechanism and the clamping groove; The connecting mechanism includes an assembly groove, which is symmetrically opened at the lower end of the mounting seat. A moving plate is slidably connected to the inner side of the assembly groove, and a second clamping block is fixedly connected to the opposite side of the moving plate. A U-rod is fixedly connected to the side of the moving plate away from the second clamping block, and the end of the U-rod slides through the wall of the assembly groove. A second spring is sleeved on the outer side of one end of the U-rod close to the moving plate.

2. The AMR linear sensor based on coil bias according to claim 1, characterized in that: A second sliding groove is symmetrically provided on the inner side of the assembly groove, and the end of the moving plate is slidably connected to the inner side of the second sliding groove.

3. The AMR linear sensor based on coil bias according to claim 1, characterized in that: The fixing mechanism includes a square groove, which is opened at the upper end of the mounting seat, a support plate is fixedly installed on the inner side of the square groove, the support plate and the opposite side of the square groove are rotatably connected with the same screw, the upper end of the screw is rotatably penetrated through the support plate and a rotating block is fixedly installed, the outer side of the screw is threadedly connected with a square plate, the square plate is slidably connected to the inner side of the square groove, and a pressure rod is symmetrically fixedly connected to the lower end of the square plate, and the pressure rod slides through the wall of the square groove at one end away from the square plate.

4. The AMR linear sensor based on coil bias according to claim 3, characterized in that: A first sliding groove is symmetrically provided on the inner side of the square groove, the end of the square plate is slidably connected to the inner side of the first sliding groove, and the end of the pressing rod away from the square plate is arranged directly above the second clamping block.

5. The AMR linear sensor based on coil bias according to claim 3, characterized in that: A circular groove is formed at the lower end of the linear sensor body, and the circular groove is arranged just above the rotating block.

6. The AMR linear sensor based on coil bias according to claim 1, characterized in that: The lower end of the linear sensor body is symmetrically provided with positioning grooves, and the upper end of the mounting seat is symmetrically fixed with positioning blocks, and the positioning blocks and the positioning grooves are plug-connected.

7. The AMR linear sensor based on coil bias according to claim 1, characterized in that: The mounting mechanism includes a movable groove, which is symmetrically opened at the upper end of the mounting seat, a sliding rod is symmetrically fixedly installed on the inner side of the movable groove, a first clamping block is slidably connected to the outer side of the sliding rod, a first spring is sleeved on the outer side of the sliding rod, a push block is fixedly connected to the side of the first clamping block away from the first spring, an end of the push block away from the first clamping block slides through the wall of the movable groove, and the clamping end of the first clamping block movably extends into the inner side of the fixed groove and is clamped in the clamping groove.

8. The AMR linear sensor based on coil bias according to claim 7, characterized in that: A spring groove is symmetrically provided on one side of the inner wall of the movable groove, one end of the slide rod is fixedly mounted on the inner side of the spring groove, and one end of the first spring is arranged on the inner side of the spring groove.

9. The AMR linear sensor based on coil bias according to claim 7, characterized in that: The outer side of the push block is symmetrically provided with a limiting groove, the inner side of the mounting seat is provided with a rectangular hole, the rectangular hole and the inside of the movable groove are communicated with each other, and the push block is slidably connected with the inner wall of the limiting groove and the rectangular hole.

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