A fluxgate sensor and method of use thereof

Abstract

The application relates to the technical field of sensors, in particular to a fluxgate sensor and a use method thereof, which comprises a damping frame, a fixing box and a limiting assembly, the fixing box comprises a fixing frame, a fixed plate and a movable plate, the fixed plate is fixedly arranged on one end of the fixing frame inside the damping frame, the fixed plate is upwardly provided with a roller which can rotate, two limiting assemblies which are mirror images are arranged on the fixing frame and are in sliding connection with the fixing frame, the movable plate is slidingly arranged on one end of the fixing frame inside the damping frame, a through hole through which the working roller passes is formed in the movable plate, the roller can be arranged between the fixed plate and the movable plate, and the movement of the limiting assembly can drive the movable plate to move. The fluxgate sensor placed in the fixing frame can be automatically moved to the center of the fixing frame under the work of the two limiting assemblies and is fixed, displacement does not occur in the drilling process, and the accuracy of measurement data is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a fluxgate sensor and a use method thereof. BACKGROUND

[0002] The fluxgate sensor is a sensor for measuring a weak magnetic field by using a high-permeability core in a measured magnetic field under the saturation excitation of an alternating magnetic field, and the magnetic induction intensity and the magnetic field intensity have a nonlinear relationship. When the construction personnel drills in the mine, the fluxgate sensor is generally used for measurement. However, when the fluxgate sensor measures in the mine, the impact generated during drilling may cause certain interference to the fluxgate sensor, and thus the detection result of the sensor is prone to error. In addition, the sensor is directly fixed for use, and the impact force generated during drilling may cause the sensor to vibrate, and after long-term use, the internal components may be loose or slip, which is not conducive to firm fixation of the sensor.

[0003] Chinese patent CN113931617B discloses a mine drilling measurement fluxgate sensor, which is convenient to buffer and dampen the impact force received by the fluxgate sensor arranged inside the fixing mechanism through the cooperation of the pressure relief mechanism and the fixing mechanism, which is also conducive to protecting the sensor body in the fixing plate to a certain extent. The cooperation of the limiting mechanism and the fixing structure is convenient for the limiting mechanism to clamp and fix the sensor body placed in the fixing mechanism. During use, the fluxgate sensor is placed in the fixing mechanism after moving one end of the limiting mechanism, and then clamped by the limiting mechanism. At this time, the fixed position of the fluxgate sensor may not be at the center of the fixing mechanism, and the position of the fluxgate sensor after being fixed cannot be easily moved due to the friction between the fluxgate sensor and the fixing mechanism, so that the position of the fluxgate sensor is gradually moved from the edge to the center during drilling measurement, which leads to inaccuracy of the measurement result. At the same time, it is also more tedious and inaccurate to determine the position of the fluxgate sensor by manual operation. SUMMARY

[0004] In view of the above problems, a fluxgate sensor is provided, which provides support force to the fluxgate sensor through the roller so that the fluxgate sensor inside the fixed frame can still move, provides support force to the fluxgate sensor through the movable plate so that the position of the fluxgate sensor in the fixed frame cannot move, and clamps and fixes the fluxgate sensor through the limiting assembly.

[0005] To solve the problems in the prior art, the technical scheme adopted by the present application is as follows:

[0006] Provided is a fluxgate sensor, comprising a damping frame, a fixed box arranged inside the damping frame, and a limiting assembly arranged inside the fixed box, the fixed box comprising a fixed frame, a fixed plate, and a movable plate, the fixed frame being arranged inside the damping frame, the fixed frame having two ends open towards directions close to and away from the damping frame, the fixed plate being fixedly arranged on the fixed frame at one end inside the damping frame, one side of the fixed plate facing the inside of the fixed frame being rotatably provided with at least nine rollers, the fixed frame being provided with two mirror-image limiting assemblies, the limiting assemblies being in sliding connection with the fixed frame, the sliding direction of the limiting assemblies being parallel to the connecting line of the two limiting assemblies, the rotating shaft direction of the rollers being parallel to the connecting line direction of the two limiting assemblies, the movable plate being slidingly arranged on the fixed frame at one end inside the damping frame, the sliding direction of the movable plate being parallel to the connecting line direction of the two openings of the fixed frame, the movable plate being provided with a through hole through which the working rollers pass, the rollers being capable of being between the fixed plate and the movable plate, and the movement of the limiting assemblies being capable of driving the movable plate to move.

[0007] Preferably, the fixed box further comprises a first spring, one end of the first spring being fixedly connected with the movable plate, the other end of the first spring being fixedly connected with the fixed frame, the axis of the first spring being parallel to the sliding direction of the movable plate, the first spring being between the movable plate and the damping frame, and the limiting assemblies being capable of driving the movable plate to slide away from the inside of the fixed frame when sliding towards the direction away from the inside of the fixed frame.

[0008] Preferably, the fixed box further comprises a movable long frame, a first movable block, and a second movable block, the movable long frame being slidingly arranged in the fixed frame, the length direction of the movable long frame being perpendicular to the sliding direction of the limiting assemblies, the length direction of the movable long frame being perpendicular to the sliding direction of the movable plate, the sliding direction of the movable long frame being parallel to the length direction of the movable long frame, the first movable block being slidingly arranged inside the movable long frame, the sliding direction of the first movable block being parallel to the length direction of the movable long frame, the first movable block being hingedly connected with a first hinge rod, the other end of the first hinge rod being hingedly connected with the limiting assemblies, the second movable block being slidingly arranged in the fixed box, the second movable block being above the movable plate and in contact with the movable plate, the sliding direction of the second movable block being parallel to the sliding direction of the movable plate, the second movable block being hingedly connected with a second hinge rod, the other end of the second hinge rod being hingedly connected with the movable long frame.

[0009] Preferably, the movable plate is fixedly provided with limiting protrusions at four corners, the fixed frame is provided with limiting sliding grooves for sliding cooperation with the limiting protrusions, and the length direction of the limiting sliding grooves is parallel to the sliding direction of the movable plate.

[0010] Preferably, the interior of the fixed frame is fixedly provided with a first guide rod, the fixed plate is fixedly provided with a second guide rod, the axis of the first guide rod is parallel to the length direction of the movable long frame, the first guide rod is in sliding connection with the movable long frame, the first guide rod is in sliding connection with the first movable block, the axis of the second guide rod is parallel to the sliding direction of the second movable block, the second guide rod is in sliding connection with the second movable block, and the second guide rod is in sliding connection with the limiting protrusion.

[0011] Preferably, the movable long frame is slidably provided with a wedge-shaped block, the inclined surface of the wedge-shaped block is arranged towards the direction close to the second movable block, the sliding direction of the wedge-shaped block is parallel to the sliding direction of the movable plate, the fixed frame is provided with a clamping hole matched with the wedge-shaped block in work, and the movable strip is slidably arranged in the clamping hole, and the sliding direction of the movable strip is parallel to the sliding direction of the movable long frame.

[0012] Preferably, the limiting assembly comprises a limiting plate, a connecting rod and a second spring, the limiting plate is hingedly provided with two first hinge rods, the connecting rod is rotatably connected with the limiting plate, the connecting rod is in sliding connection with the fixed frame, the axis of the connecting rod is parallel to the connecting direction of the two limiting assemblies, the sliding direction of the connecting rod is parallel to the axis direction of the connecting rod, the second spring is fixedly arranged between the fixed frame and the limiting plate, and the second spring is sleeved on the connecting rod.

[0013] Preferably, the limiting assembly further comprises a first movable ring and a second movable ring, the first movable ring is sleeved on the connecting rod, the first movable ring is located in the interior of the fixed frame, the first movable ring is fixedly connected with a pull rope, the other end of the pull rope is fixedly connected with the movable strip, the second movable ring is sleeved on the connecting rod, the second movable ring is located in the exterior of the fixed frame, the first movable ring is fixedly provided with a fixed strip extending along the axis direction of the first movable ring, and the second movable ring is provided with a fixed groove matched with the fixed strip in work.

[0014] Preferably, the limiting assembly further comprises a torsion spring, one end of the torsion spring is fixedly connected with the first movable ring, the other end of the torsion spring is fixedly connected with the fixed frame, and the torsion spring is sleeved on the connecting rod.

[0015] Preferably, the movable plate is a sponge plate.

[0016] The present application has the following beneficial effects compared with the prior art:

[0017] The application realizes the functions of providing support force to the fluxgate sensor so that the fluxgate sensor in the fixed frame can still move, providing support force to the fluxgate sensor so that the position of the fluxgate sensor in the fixed frame cannot move, and clamping and fixing the fluxgate sensor through the limiting assembly, so that the fluxgate sensor placed in the fixed frame can be conveniently and automatically moved to the center of the fixed frame and fixed under the work of the two limiting assemblies, without the need for personnel to spend time to adjust the position of the fluxgate sensor, ensuring that displacement does not occur during drilling while having certain anti-shock effect, and improving the accuracy of measurement data. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of a fluxgate sensor;

[0019] Figure 2 is a top view of a fluxgate sensor;

[0020] Figure 3 is a perspective view of a fixed box 2 in a fluxgate sensor;

[0021] Figure 4 is a perspective view of a fixed box 2 in a fluxgate sensor Figure 1 ;

[0022] Figure 5 is a partial enlarged view of A in Figure 4 ;

[0023] Figure 6 is a perspective view of a fixed box 2 in a fluxgate sensor Figure 2 ;

[0024] Figure 7 is a partial enlarged view of B in Figure 6 ;

[0025] Figure 8 is a perspective view of a fixed box 2 in a fluxgate sensor

[0026] Figure 9 is a partial enlarged view of C in Figure 8 ;

[0027] Figure 10 is a partial enlarged view of D in Figure 8 ;

[0028] Figure 11 is a partial enlarged view of E in Figure 8 .

[0029] Reference numerals in the drawings are:

[0030] 1-damping frame;

[0031] 2-fixed box;

[0032] 21-fixed frame; 211-limiting sliding groove; 212-first guide rod; 213- clamping hole; 214-movable strip;

[0033] 22-fixed plate; 221-roller; 222-second guide rod;

[0034] 23-movable plate; 231-through hole; 232-limiting protrusion;

[0035] 24-first spring;

[0036] 25-movable long frame; 251-wedge-shaped block;

[0037] 26-first movable block; 261-first hinged rod;

[0038] 27-second movable block; 271-second hinged rod;

[0039] 3-limiting assembly;

[0040] 31-limiting plate;

[0041] 32-connecting rod;

[0042] 33-second spring;

[0043] 34-first movable ring; 341-pulling rope; 342-fixed strip;

[0044] 35-second movable ring; 351-fixed groove;

[0045] 36-torsional spring. DETAILED DESCRIPTION

[0046] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application will be described in further detail below in combination with the drawings and specific embodiments.

[0047] Reference Figure 1 and Figures 4-7The illustrated magnetic flux gate sensor comprises a damping frame 1, a fixed box 2 arranged inside the damping frame 1, and a limiting assembly 3 arranged inside the fixed box 2. The fixed box 2 comprises a fixed frame 21, a fixed plate 22, and a movable plate 23. The fixed frame 21 is arranged inside the damping frame 1. The two ends of the fixed frame 21 are open and face the direction close to and away from the damping frame 1. The fixed plate 22 is fixedly arranged on the fixed frame 21 at one end inside the damping frame 1. At least nine rollers 221 are rotatably arranged on the side of the fixed plate 22 facing the inside of the fixed frame 21. Two limiting assemblies 3 are arranged on the fixed frame 21 in a mirror image. The limiting assemblies 3 are in sliding connection with the fixed frame 21. The sliding direction of the limiting assemblies 3 is parallel to the line connecting the two limiting assemblies 3. The rotation axis direction of the rollers 221 is parallel to the line connecting the two limiting assemblies 3. The movable plate 23 is slidingly arranged on the fixed frame 21 at one end inside the damping frame 1. The sliding direction of the movable plate 23 is parallel to the line connecting the two openings of the fixed frame 21. A through hole 231 through which the working rollers 221 pass is formed in the movable plate 23. The rollers 221 can be between the fixed plate 22 and the movable plate 23. The movement of the limiting assemblies 3 can drive the movable plate 23 to move.

[0048] The user first controls the limiting assembly 3 to move away from the center of the fixed frame 21, then controls the limiting assembly 3 to remain unchanged at this time and places the fluxgate sensor into the inside of the fixed frame 21 and makes the fluxgate sensor between the two limiting assemblies 3, because the limiting assembly 3 is away from the center of the fixed frame 21, at this time the movable plate 23 will move away from the center of the fixed frame 21, so that the position of the drum 221 inside the fixed frame 21 is higher than the movable plate 23, at this time the fluxgate sensor placed into the inside of the fixed frame 21 will be in contact with the drum 221, then release the limiting assembly 3, the released limiting assembly 3 moves towards the fluxgate sensor to cooperate with the other limiting assembly 3 to clamp and fix the fluxgate sensor, at this time because the fluxgate sensor is in contact with the drum 221, the friction on the fluxgate sensor is small, the fluxgate sensor moves under the pushing of the two limiting assemblies 3 to move inside the fixed frame 21 until it is in the center of the fixed frame 21, then control the movable plate 23 to move towards the fluxgate sensor to contact the fluxgate sensor, at this time the movable plate 23 will provide support force to the fluxgate sensor instead of the drum 221, at this time the position of the fluxgate sensor is stably fixed, then place the entire fixed box 2 inside the shock-absorbing frame 1, and install the shock-absorbing frame 1 on the drilling equipment for use, compared with the prior art, the drum 221 of the present application provides support force to the fluxgate sensor, so that the fluxgate sensor inside the fixed frame 21 can still move, the movable plate 23 provides support force to the fluxgate sensor, so that the position of the fluxgate sensor in the fixed frame 21 cannot move, the limiting assembly 3 clamps and fixes the fluxgate sensor, so that the fluxgate sensor placed in the fixed frame 21 can be conveniently and automatically moved to the center of the fixed frame 21 under the work of the two limiting assemblies 3 and fixed, without the user spending time to adjust the position of the fluxgate sensor, ensuring that there is no displacement during drilling and having a certain anti-shock effect, improving the accuracy of measurement data.

[0049] Referring to Figures 4 to 8 As shown: the fixed box 2 further comprises a first spring 24, one end of the first spring 24 is fixedly connected with the movable plate 23, the other end of the first spring 24 is fixedly connected with the fixed frame 21, the axis of the first spring 24 is parallel to the sliding direction of the movable plate 23, the first spring 24 is between the movable plate 23 and the shock-absorbing frame 1, the limiting assembly 3 slides away from the inside of the fixed frame 21 can drive the movable plate 23 to slide away from the inside of the fixed frame 21.

[0050] When the limiting assembly 3 moves away from the center of the fixed frame 21, the movable plate 23 away from the center of the fixed frame 21 will move away from the center of the fixed frame 21, so that the position of the roller 221 inside the fixed frame 21 is higher than that of the movable plate 23, at this time, the fluxgate sensor placed in the fixed frame 21 will be in contact with the roller 221, the first spring 24 will be continuously compressed, then the fluxgate sensor is placed in the fixed frame 21, the fluxgate sensor will be in contact with the roller 221, then the limiting assembly 3 is released, the first spring 24 is in a decompressed state and pushes the movable plate 23 to be close to the fluxgate sensor, thereby providing support instead of the roller 221, compared with the prior art, the first spring 24 of the present application pushes the movable plate 23 to be close to the fluxgate sensor, thereby avoiding that the volume of the fluxgate sensor is large enough to make the movable plate 23 unable to contact the fluxgate sensor after the limiting assembly 3 contacts the fluxgate sensor.

[0051] Referring to Figures 4 to 9 As shown in the drawings, the fixed box 2 further comprises a movable long frame 25, a first movable block 26 and a second movable block 27, the movable long frame 25 is slidingly arranged in the fixed frame 21, the length direction of the movable long frame 25 is perpendicular to the sliding direction of the limiting assembly 3, the length direction of the movable long frame 25 is perpendicular to the sliding direction of the movable plate 23, the sliding direction of the movable long frame 25 is parallel to the length direction of the movable long frame 25, the first movable block 26 is slidingly arranged in the inside of the movable long frame 25, the sliding direction of the first movable block 26 is parallel to the length direction of the movable long frame 25, the first movable block 26 is hinged with a first hinge rod 261, the other end of the first hinge rod 261 is hinged with the limiting assembly 3, the second movable block 27 is slidingly arranged in the fixed box 2, the second movable block 27 is above the movable plate 23 and in contact with the movable plate 23, the sliding direction of the second movable block 27 is parallel to the sliding direction of the movable plate 23, the second movable block 27 is hinged with a second hinge rod 271, the other end of the second hinge rod 271 is hinged with the movable long frame 25.

[0052] When the limiting assembly 3 moves away from the center of the fixed frame 21, the first movable block 26 will be moved by the first hinge rod 261, the first movable block 26 moves a certain distance and contacts the end of the movable long frame 25, thereby pushing the movable long frame 25 to move, when the movable long frame 25 moves, the second movable block 27 will be moved by the second hinge rod 271, the second movable block 27 pushes the movable plate 23 to move away from the center of the fixed frame 21, the first spring 24 is continuously compressed, compared with the prior art, the movable long frame 25, the first movable block 26 and the second movable block 27 of the present application cooperate to make the movement of the limiting assembly 3 and the movable plate 23 away from the center of the fixed frame 21 not synchronous, thereby avoiding that the limiting assembly 3 drives the movable plate 23 to move to a position away from the fixed frame 21.

[0053] Referring toFigure 8 As shown: four corners of the movable plate 23 are fixedly provided with limiting protrusions 232, and the fixed frame 21 is provided with limiting sliding grooves 211 which are slidably matched with the limiting protrusions 232, and the length direction of the limiting sliding grooves 211 is parallel to the sliding direction of the movable plate 23.

[0054] When the limiting assembly 3 is away from the center of the fixed frame 21, at this time, the first spring 24 is compressed and the movable plate 23 is away from the center of the fixed frame 21, the fluxgate sensor is placed into the fixed frame 21, and the fluxgate sensor is in contact with the roller 221 at this time, the limiting assembly 3 is released, the first spring 24 is out of the compressed state and pushes the movable plate 23 to move towards the direction of the fluxgate sensor, and after the movable plate 23 moves a certain distance, the limiting protrusion 232 is in contact with the limiting sliding groove 211, and the movable plate 23 stops moving, compared with the prior art, the limiting protrusion 232 and the limiting sliding groove 211 of the present application cooperate to limit the moving range of the movable plate 23 under the elastic force of the first spring 24, so as to avoid the movable plate 23 from colliding with the fluxgate sensor under the elastic force of the first spring 24.

[0055] Referring to Figures 8 to 10 As shown: the inside of the fixed frame 21 is fixedly provided with a first guide rod 212, and the fixed plate 22 is fixedly provided with a second guide rod 222, the axis of the first guide rod 212 is parallel to the length direction of the movable long frame 25, the first guide rod 212 is slidably connected with the movable long frame 25, the first guide rod 212 is slidably connected with the first movable block 26, the axis of the second guide rod 222 is parallel to the sliding direction of the second movable block 27, the second guide rod 222 is slidably connected with the second movable block 27, and the second guide rod 222 is slidably connected with the limiting protrusion 232.

[0056] When the limiting assembly 3 moves away from the center of the fixed frame 21, the first movable block 26 will move along the axis direction of the first guide rod 212 through the connection of the first hinged rod 261, then the movable long frame 25 will move along the axis direction of the first guide rod 212 through the pushing of the first movable block 26, then the second movable block 27 will push the movable plate 23 to move along the axis direction of the second guide rod 222 through the connection of the second hinged rod 271, compared with the prior art, the first guide rod 212 and the second guide rod 222 of the present application cooperate to limit the moving direction of the first movable block 26, the second movable block 27 and the movable long frame 25, so as to ensure that the various parts in the whole device can normally cooperate.

[0057] Referring to Figures 8 to 9As shown: the wedge-shaped block 251 is slidably arranged on the long movable frame 25, the inclined surface of the wedge-shaped block 251 is arranged towards the direction close to the second movable block 27, the sliding direction of the wedge-shaped block 251 is parallel to the sliding direction of the movable plate 23, the fixed frame 21 is provided with a clamping hole 213 matched with the wedge-shaped block 251, and the movable strip 214 is slidably arranged in the clamping hole 213, and the sliding direction of the movable strip 214 is parallel to the sliding direction of the long movable frame 25.

[0058] When the limiting assembly 3 moves away from the center of the fixed frame 21, the first movable block 26 is pushed to move the long movable frame 25, and the wedge-shaped block 251 moves along with the long movable frame 25, the inclined surface of the wedge-shaped block 251 first contacts the side of the clamping hole 213 and then is retracted into the long movable frame 25, and then the long movable frame 25 is continuously pushed by the first movable block 26, and when the wedge-shaped block 251 moves above the clamping hole 213, the wedge-shaped block 251 is inserted into the clamping hole 213, so that the position of the long movable frame 25 is fixed, and the position of the first movable block 26 is also fixed, the first spring 24 is compressed, the movable strip 214 is pushed to move towards the wedge-shaped block 251, and the wedge-shaped block 251 is pushed out of the clamping hole 213, so that the first spring 24 is released from the compression state, compared with the prior art, the wedge-shaped block 251, the clamping hole 213 and the movable strip 214 are matched to fix the position of the second movable block 27, so that the movement of the limiting assembly 3 and the movable plate 23 towards the center of the fixed frame 21 is not synchronized.

[0059] As shown in Figure 6 and Figure 11 As shown: the limiting assembly 3 comprises a limiting plate 31, a connecting rod 32 and a second spring 33, the limiting plate 31 is hingedly connected with two first hinge rods 261, the connecting rod 32 is rotatably connected with the limiting plate 31, the connecting rod 32 is slidably connected with the fixed frame 21, the axis of the connecting rod 32 is parallel to the direction of the connecting line of the two limiting assemblies 3, the sliding direction of the connecting rod 32 is parallel to the axis direction of the connecting rod 32, the second spring 33 is fixedly arranged between the fixed frame 21 and the limiting plate 31, and the second spring 33 is sleeved on the connecting rod 32.

[0060] The connecting rod 32 is held and moved away from the center of the fixed frame 21, the limiting plate 31 moves away from the center of the fixed frame 21 along with the movement of the connecting rod 32, the second spring 33 is constantly compressed, the magnetic flux gate sensor is placed in the fixed frame 21, and then the connecting rod 32 is released, the second spring 33 is released from the compression state and drives the limiting plate 31 to move by the elastic force, compared with the prior art, the limiting plate 31 and the second spring 33 of the present application enable the two limiting assemblies 3 to be mirror-imaged, so that the magnetic flux gate sensor can move to the center of the fixed frame 21.

[0061] As shown in Figure 6 ,Figure 10 and Figure 11 As shown in the figure: the limiting assembly 3 further comprises a first movable ring 34 and a second movable ring 35, the first movable ring 34 is sleeved on the connecting rod 32, the first movable ring 34 is inside the fixed frame 21, the first movable ring 34 is fixedly connected with a pull rope 341, the other end of the pull rope 341 is fixedly connected with the movable strip 214, the second movable ring 35 is sleeved on the connecting rod 32, the second movable ring 35 is outside the fixed frame 21, the first movable ring 34 is fixedly provided with a fixed strip 342 extending along the axis direction of the first movable ring 34, and the second movable ring 35 is provided with a fixed groove 351 matched with the fixed strip 342.

[0062] The limiting plate 31 is controlled to move away from the center of the fixed frame 21, when the limiting plate 31 moves, the movable plate 23 also moves away from the center of the fixed frame 21, then the wedge-shaped block 251 is clamped into the clamping hole 213, the first spring 24 is in a compressed state and is fixed, then the fluxgate sensor is placed in the fixed frame 21, the limiting plate 31 is released to clamp the fluxgate sensor under the action of the second spring 33, then the second movable ring 35 drives the first movable ring 34 to rotate, the pull rope 341 drives the movable strip 214 to push out the wedge-shaped block 251, the first spring 24 is in a decompressed state and pushes the movable plate 23 to be close to the fluxgate sensor, compared with the prior art, the first movable plate 23, the second movable plate 23 and the pull rope 341 cooperate to control the moving direction of the movable strip 214, so that the fixed state of the movable plate 23 is conveniently and quickly released.

[0063] Referring to Figure 6 and Figure 11 As shown in the figure: the limiting assembly 3 further comprises a torsional spring 36, one end of the torsional spring 36 is fixedly connected with the first movable ring 34, the other end of the torsional spring 36 is fixedly connected with the fixed frame 21, and the torsional spring 36 is sleeved on the connecting rod 32.

[0064] After the movable plate 23 is pushed to be close to the fluxgate sensor under the action of the first spring 24, the second movable ring 35 is released at this time, the torsional spring 36 provides an elastic force to make the first movable ring 34 and the second movable ring 35 reverse, at this time, the movable strip 214 can slide freely in the clamping hole 213, compared with the prior art, the torsional spring 36 of the present application fixes the position of the first movable ring 34 in the state without external force, so that the wedge-shaped block 251 can be clamped into the clamping hole 213.

[0065] Referring to Figure 4 , Figure 6 and Figure 8 As shown in the figure: the movable plate 23 is a sponge plate.

[0066] Compared with the prior art, the movable plate 23 is provided as a sponge plate, so that the friction between the movable plate 23 and the fluxgate sensor is improved, and the possibility of movement of the fluxgate sensor is reduced.

[0067] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A fluxgate sensor, comprising a damping frame (1), a fixed box (2) arranged inside the damping frame (1), and a limiting assembly (3) arranged inside the fixed box (2), characterized in that, The fixed box (2) comprises a fixed frame (21), a fixed plate (22) and a movable plate (23); The fixed frame (21) is arranged inside the damping frame (1), and the two ends of the fixed frame (21) are open and face the directions close to and away from the damping frame (1); The fixed plate (22) is fixedly arranged at one end of the fixed frame (21) inside the damping frame (1), one side of the fixed plate (22) facing the inside of the fixed frame (21) is rotatably provided with at least nine rollers (221), two mirror-image limiting assemblies (3) are arranged on the fixed frame (21), the limiting assemblies (3) are slidably connected with the fixed frame (21), the sliding direction of the limiting assemblies (3) is parallel to the connecting line of the two limiting assemblies (3), and the rotating shaft direction of the rollers (221) is parallel to the connecting line direction of the two limiting assemblies (3); The movable plate (23) is slidably arranged at one end of the fixed frame (21) inside the damping frame (1), the sliding direction of the movable plate (23) is parallel to the connecting line direction of the two openings of the fixed frame (21), and a through hole (231) through which the working roller (221) passes is formed in the movable plate (23), the rollers (221) can be arranged between the fixed plate (22) and the movable plate (23), and the movement of the limiting assemblies (3) can drive the movable plate (23) to move; The movable plate (23) can move away from the center of the fixed frame (21), so that the position of the roller (221) inside the fixed frame (21) is higher than that of the movable plate (23), the magnetic flux gate sensor placed in the fixed frame (21) is in contact with the roller (221), then the limiting assembly (3) is released, the released limiting assembly (3) moves towards the magnetic flux gate sensor, the magnetic flux gate sensor is clamped and fixed by the other limiting assembly (3), the magnetic flux gate sensor moves in the fixed frame (21) under the pushing of the two limiting assemblies (3) until the center of the fixed frame (21), then the movable plate (23) moves towards the magnetic flux gate sensor and is in contact with the magnetic flux gate sensor, the movable plate (23) provides support force to the magnetic flux gate sensor instead of the roller (221), and the position of the magnetic flux gate sensor is stably fixed.

2. A fluxgate sensor according to claim 1, characterized in that The fixed box (2) further comprises a first spring (24); One end of the first spring (24) is fixedly connected with the movable plate (23), the other end of the first spring (24) is fixedly connected with the fixed frame (21), the axis of the first spring (24) is parallel to the sliding direction of the movable plate (23), the first spring (24) is arranged between the movable plate (23) and the damping frame (1), and when the limiting assembly (3) slides away from the inside of the fixed frame (21), the movable plate (23) can slide away from the inside of the fixed frame (21).

3. A fluxgate sensor according to claim 2, characterised in that The fixed box (2) further comprises a movable long frame (25), a first movable block (26) and a second movable block (27); The movable long frame (25) is slidably arranged in the fixed frame (21), the length direction of the movable long frame (25) is perpendicular to the sliding direction of the limiting assembly (3), the length direction of the movable long frame (25) is perpendicular to the sliding direction of the movable plate (23), the sliding direction of the movable long frame (25) is parallel to the length direction of the movable long frame (25), the first movable block (26) is slidably arranged in the movable long frame (25), the sliding direction of the first movable block (26) is parallel to the length direction of the movable long frame (25), the first movable block (26) is hingedly connected with the first hinge rod (261), the other end of the first hinge rod (261) is hingedly connected with the limiting assembly (3), the second movable block (27) is slidably arranged in the fixed box (2), the second movable block (27) is above the movable plate (23) and in contact with the movable plate (23), the sliding direction of the second movable block (27) is parallel to the sliding direction of the movable plate (23), the second movable block (27) is hingedly connected with the second hinge rod (271), the other end of the second hinge rod (271) is hingedly connected with the movable long frame (25).

4. A fluxgate sensor according to claim 3, characterised in that The four corners of the movable plate (23) are fixedly provided with limiting protrusions (232), the fixed frame (21) is provided with limiting sliding grooves (211) matched with the limiting protrusions (232) for sliding, and the length direction of the limiting sliding grooves (211) is parallel to the sliding direction of the movable plate (23).

5. A fluxgate sensor according to claim 4, characterised in that The inside of the fixed frame (21) is fixedly provided with a first guide rod (212), and the fixed plate (22) is fixedly provided with a second guide rod (222); the axis of the first guide rod (212) is parallel to the length direction of the movable long frame (25), the first guide rod (212) is slidably connected with the movable long frame (25), the first guide rod (212) is slidably connected with the first movable block (26), the axis of the second guide rod (222) is parallel to the sliding direction of the second movable block (27), the second guide rod (222) is slidably connected with the second movable block (27), and the second guide rod (222) is slidably connected with the limiting protrusion (232).

6. A fluxgate sensor according to claim 5, characterised in that The movable long frame (25) is slidably provided with a wedge-shaped block (251), the inclined surface of the wedge-shaped block (251) is arranged to face the direction close to the second movable block (27), the sliding direction of the wedge-shaped block (251) is parallel to the sliding direction of the movable plate (23), the fixed frame (21) is provided with a clamping hole (213) matched with the wedge-shaped block (251) for working, and the clamping hole (213) is slidably provided with a movable strip (214); the sliding direction of the movable strip (214) is parallel to the sliding direction of the movable long frame (25).

7. A fluxgate sensor according to claim 6, characterised in that The limiting assembly (3) comprises a limiting plate (31), a connecting rod (32) and a second spring (33). The limiting plate (31) is hingedly connected with two first hinge rods (261), the connecting rod (32) is rotatably connected with the limiting plate (31), the connecting rod (32) is slidably connected with the fixed frame (21), the axis of the connecting rod (32) is parallel to the direction of the connecting line of the two limiting assemblies (3), the sliding direction of the connecting rod (32) is parallel to the axis direction of the connecting rod (32), the second spring (33) is fixedly arranged between the fixed frame (21) and the limiting plate (31), and the second spring (33) is sleeved on the connecting rod (32).

8. A fluxgate sensor according to claim 7, characterised in that The limiting assembly (3) further comprises a first movable ring (34) and a second movable ring (35). The first movable ring (34) is sleeved on the connecting rod (32), the first movable ring (34) is located in the interior of the fixed frame (21), the first movable ring (34) is fixedly connected with a pull rope (341), the other end of the pull rope (341) is fixedly connected with the movable strip (214), the second movable ring (35) is sleeved on the connecting rod (32), the second movable ring (35) is located in the exterior of the fixed frame (21), the first movable ring (34) is fixedly provided with a fixed strip (342) extending along the axis direction thereof, and the second movable ring (35) is provided with a fixed groove (351) cooperating with the fixed strip (342).

9. A fluxgate sensor according to claim 8, characterised in that The limiting assembly (3) further comprises a torsion spring (36). One end of the torsion spring (36) is fixedly connected with the first movable ring (34), the other end of the torsion spring (36) is fixedly connected with the fixed frame (21), and the torsion spring (36) is sleeved on the connecting rod (32).

10. A fluxgate sensor according to any one of claims 1-9, characterized in that The movable plate (23) is a sponge plate.

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