High-precision magnetic sensor adopting TMR technology
By adopting structures such as protective covers and filter plates in the magnetic sensor, the problems of heat emissions and dust pollution are solved, and a higher service life and better heat dissipation effect are achieved.
Patent Information
- Application Number
- CN202420997910.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-09
AI Technical Summary
The heat generated by existing magnetic sensors during operation is difficult to discharge, resulting in the operation of electronic components being affected. At the same time, dust and pollutants in the air enter the casing through the vents, damaging the electronic components and reducing their service life.
A high-precision magnetic sensor using TMR technology is designed, and a structure such as a protective cover and filter plate are used to prevent dust and pollutants from entering. At the same time, effective heat dissipation and protection are achieved through the combination of vents and adhesive sponges.
It effectively improves the service life of the electronic components inside the magnetic sensor, prevents damage to the components by dust and contaminants, and ensures good heat dissipation effect and prevents the ventilation port from being blocked.
Smart Images
Figure CN222599816U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of magnetic sensors, and particularly relates to a high-precision magnetic sensor using TMR technology. Background Art
[0002] TMR high-precision magnetic sensor is an advanced sensor technology based on tunnel magnetoresistance effect, which is used to measure the strength and direction of magnetic field. The working principle of TMR sensor is based on quantum tunneling effect. The sensor contains two magnetic layers, fixed layer and free layer, and a thin non-magnetic tunnel isolation layer. When the external magnetic field changes the magnetization direction of the free layer, it affects the tunneling probability of electrons through the tunnel isolation layer, resulting in a change in resistance. By measuring this resistance change, the strength and direction of the external magnetic field can be accurately inferred.
[0003] However, the existing magnetic sensors still have some shortcomings. The electronic components of the magnetic sensors are installed inside the casing. When these electronic components are running, they will release a certain amount of heat. If this heat is not removed, it will cause certain interference to the continuous operation of the electronic components. Therefore, ventilation holes are opened on the casing of the magnetic sensor. The wind circulated in the ventilation holes is mutual. The dust and pollutants contained in the air will also enter the casing through the ventilation holes and adsorb on the surface of the electronic components. After a long period of accumulation, these dust and pollutants will cause certain influences and damage to the operation of the electronic components, thereby reducing the service life of the electronic components. Utility Model Content
[0004] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a high-precision magnetic sensor using TMR technology to solve the problems mentioned in the background technology.
[0005] The above technical objectives of the utility model are achieved through the following technical solutions:
[0006] A high-precision magnetic sensor using TMR technology comprises a magnetic sensor body, a protective cover is clamped on the top of the magnetic sensor body, the protective cover covers the top of the magnetic sensor body, a mounting plate is threadedly connected to the inner bottom of the magnetic sensor body, a magnetic sensitive element and a signal processing circuit module are fixedly installed on the top of the mounting plate, a connection interface is provided on one side of the magnetic sensor body, a vent is provided at the bottom of the magnetic sensor body, the vent is communicated with the inside of the magnetic sensor body, a square opening is provided on the top of the mounting plate, the position of the square opening is symmetrical to the position of the vent, a filter plate is threadedly connected to the inner wall of the vent, the filter plate covers the inner side of the vent, a sponge is fixedly connected to the bottom of the vent, a dustproof cloth is fixedly attached to the bottom of the sponge, and the dustproof cloth covers the bottom of the filter plate. The bottom end of the magnetic sensor body is fixedly connected with a support frame, the position of the support frame is opposite to the position of the vent, a strip opening is opened on the outside of the support frame, the strip opening passes through the support frame, and the bottom end of the magnetic sensor body is threadedly connected with a support leg. When the electrical components inside the magnetic sensor body are running, the mutual connection between the square opening and the vent can be beneficial to the discharge of hot air. The support frame can support the bottom end of the magnetic sensor body to prevent the vent from being blocked. Due to the presence of the filter plate, the filter plate can effectively protect the inner side of the vent without hindering the normal ventilation of the vent. The dustproof cloth can also block the dust and pollutants flowing out of the air without hindering the heat dissipation of the vent, thereby preventing the dust and pollutants in the air from being adsorbed on the surface of the electrical components and causing harm to them.
[0007] As a preferred technical solution, a card slot is provided at the top of the magnetic sensor body, and a card block matching the card slot is fixedly connected to the bottom end of the protective cover, the card block is carded inside the card slot, and the protective cover is carded to the top of the magnetic sensor body through the card slot and the card block. A handle is fixedly connected to the top of the protective cover, the shape of the handle is concave, and the shape of the handle corners is arc-shaped. By snapping the card block in, the position of the protective cover can be effectively limited, and the protective cover can be prevented from falling. The protective cover can effectively protect the top of the magnetic sensor body, and can effectively improve the safety protection of the electronic components inside the magnetic sensor body. The handle can provide the user with a gripping point, and when the protective cover needs to be opened, the card block can be pulled out of the card slot through the handle.
[0008] As an optimal technical solution, a limiting groove is provided at the top of the magnetic sensor body, and a sealing ring matching the limiting groove is fixedly connected to the bottom end of the protective cover. The sealing ring covers the inner side of the limiting groove, and the blocking block is located close to the outer side of the sealing ring. Through the setting of the sealing ring, the sealing ring can effectively seal the connection point between the magnetic sensor body and the protective cover, thereby preventing water from flowing into the interior of the magnetic sensor body through the connection point between the two, and at the same time effectively improving the overall sealing of the magnetic sensor body.
[0009] As a preferred technical solution, a rectangular opening is provided at the top of the protective cover, the rectangular opening is communicated with the interior of the magnetic sensor body, a transparent glass is fixedly connected to the inner side of the rectangular opening, the transparent glass covers the inner side of the rectangular opening, and the position of the transparent glass is symmetrical to the position of the mounting plate. Through the opening of the rectangular opening, the user can directly view the interior of the magnetic sensor body through the transparent glass without opening the protective cover, thereby facilitating the user to observe the interior of the magnetic sensor body at all times.
[0010] As a preferred technical solution, a first screw hole is provided at the top of the mounting plate, and the first screw holes penetrate the mounting plate and the inner bottom end of the magnetic sensor body. The inner side of the first screw hole is threadedly connected with a first bolt, and the bottom end of the first bolt is threadedly connected to the inside of the magnetic sensor body through the first screw hole. The mounting plate is threadedly connected to the inner bottom end of the magnetic sensor body through the first bolt and the first screw hole. By screwing in the first bolt, the position of the mounting plate can be effectively fixed, thereby preventing the mounting plate from being displaced.
[0011] As a preferred technical solution, a first slide groove matching the mounting plate is provided on the inner wall of the magnetic sensor body, and the outer wall of the mounting plate is slidably connected to the inner side of the first slide groove. The opening of the first slide groove facilitates the up and down sliding of the mounting plate. When the mounting plate needs to be taken out, the first bolt is screwed out of the first screw hole, and then the mounting plate can be pulled out along the first slide groove.
[0012] As a preferred technical solution, a second screw hole is opened at the inner bottom end of the magnetic sensor body, and the second screw holes penetrate the magnetic sensor body and the top of the leg. The inner side of the second screw hole is threadedly connected with a second bolt, and the bottom end of the second bolt is threadedly connected to the inside of the leg through the second screw hole. The leg is threadedly connected to the bottom end of the magnetic sensor body through the second screw hole and the second bolt. The leg is threadedly fixed to the four sides of the bottom end of the magnetic sensor body near the corners. By screwing in the second bolt, the position of the leg can be effectively fixed to prevent the leg from being displaced. When the leg needs to be removed, the second bolt can be screwed out of the second screw hole.
[0013] As a preferred technical solution, a circular groove is opened at the bottom end of the leg, and a rubber pad is fixedly connected to the inner side of the circular groove. The rubber pad covers the inner side of the circular groove, and the position of the bottom end of the rubber pad is on the same horizontal line as the position of the bottom end of the leg. Through the fixation of the rubber pad, the rubber pad has good anti-slip ability and rubber shock absorption ability, thereby effectively improving the stability of the leg placement.
[0014] As a preferred technical solution, the bottom end of the filter plate is fixedly connected with a fixing block, which is L-shaped, and the top of the fixing block is in contact with the bottom end of the magnetic sensor body. A third screw hole is provided at the bottom end of the fixing block, and the third screw holes penetrate the bottom ends of the fixing block and the magnetic sensor body. The inner side of the third screw hole is threadedly connected with a third bolt, and the top end of the third bolt is threadedly connected to the inside of the magnetic sensor body through the third screw hole. By screwing in the third bolt, the position of the filter plate can be effectively fixed, and displacement of the filter plate can be avoided. When the filter plate needs to be removed, the third bolt can be screwed out of the third screw hole.
[0015] As a preferred technical solution, a second slide groove matching the filter plate is provided on the inner wall of the vent, and the outer wall of the filter plate is slidably connected to the inner side of the second slide groove. By opening the second slide groove, the position and angle of movement of the filter plate can be effectively limited, which improves the stability of the filter plate position fixation and is also more conducive to removing the filter plate later.
[0016] In summary, the utility model mainly has the following beneficial effects:
[0017] First, when using the magnetic sensor body, the mutual flow between the vent and the square opening can facilitate effective ventilation and heat dissipation inside the magnetic sensor body. The support frame can support the bottom end of the magnetic sensor body. The opening of the strip opening can prevent the vent from being blocked. Due to the existence of the filter plate, the filter plate can effectively protect the inside of the vent without hindering the normal ventilation of the vent. The dustproof cloth can also block the dust and pollutants flowing out of the air without hindering the heat dissipation of the vent, thereby preventing the dust and pollutants in the air from being adsorbed on the surface of the electrical components to cause harm to them, thereby effectively improving the service life of the electronic components inside the magnetic sensor body;
[0018] Second, due to the existence of the protective cover, the top of the magnetic sensor body can be effectively protected, and the electronic components inside the magnetic sensor body can be prevented from being bumped. When the workpiece inside the magnetic sensor body needs to be taken out for inspection and maintenance later, the protective cover is first opened through the grasping point granted by the handle, and then the first bolt is screwed out through the thread principle, and finally the entire mounting plate can be pulled out of the magnetic sensor body through the first slide groove, and the mounting plate can bring out the electronic components fixed on the top together, which improves the efficiency of disassembly and assembly of electronic components and is more conducive to the user's later inspection and maintenance of electronic components. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the utility model;
[0020] Figure 2 This is a schematic diagram of the internal structure of the magnetic sensor body of the utility model;
[0021] Figure 3 This utility model Figure 2 A schematic diagram of the enlarged structure of part A;
[0022] Figure 4 It is a schematic diagram of the bottom structure of the protective cover of the utility model;
[0023] Figure 5 This is a schematic diagram of the bottom structure of the magnetic sensor body of the utility model;
[0024] Figure 6 It is a schematic diagram of the inner structure of the vent of the utility model;
[0025] Figure 7 This utility model Figure 6 A schematic diagram of the enlarged structure of part B;
[0026] Figure 8 It is a side structural schematic diagram of the utility model.
[0027] Figure numerals: 1. magnetic sensor body, 2. protective cover, 3. rectangular mouth, 4. transparent glass, 5. handle, 6. card slot, 7. limit slot, 8. card block, 9. sealing ring, 10. mounting plate, 11. first screw hole, 12. first bolt, 13. first slide slot, 14. magnetic sensitive element, 15. signal processing circuit module, 16. connection interface, 17. square mouth, 18. second screw hole, 19. second bolt, 20. support leg, 21. circular groove, 22. rubber pad, 23. vent, 24. filter plate, 25. adhesive sponge, 26. dustproof cloth, 27. second slide slot, 28. fixing block, 29. third screw hole, 30. third bolt, 31. support frame, 32. strip mouth. DETAILED DESCRIPTION
[0028] refer to Figures 1 to 8The high-precision magnetic sensor using TMR technology described in this embodiment includes a magnetic sensor body 1, a protective cover 2 is clamped on the top of the magnetic sensor body 1, and the protective cover 2 covers the top of the magnetic sensor body 1. The inner bottom end of the magnetic sensor body 1 is threadedly connected with a mounting plate 10, and a magnetic sensitive element 14 and a signal processing circuit module 15 are fixedly installed on the top of the mounting plate 10. A connection interface 16 is provided on one side of the magnetic sensor body 1, and a vent 23 is provided at the bottom of the magnetic sensor body 1. The vent 23 is communicated with the inside of the magnetic sensor body 1. A square opening 17 is provided at the top of the mounting plate 10, and the position of the square opening 17 is symmetrical with the position of the vent 23. A filter plate 24 is threadedly connected to the inner wall of the vent 23, and the filter plate 24 covers the inner side of the vent 23. A sponge 25 is fixedly connected to the bottom end of the vent 23, and a dustproof cloth 26 is fixedly attached to the bottom end of the sponge 25, and the dustproof cloth 26 covers the bottom end of the filter plate 24. A support frame 31 is fixedly connected to the bottom end of the magnetic sensor body 1, and the position of the support frame 31 is opposite to the position of the vent 23. A strip opening 32 is opened on the outside of the support frame 31, and the strip opening 32 passes through the support frame 31. A leg 20 is threadedly connected to the bottom end of the magnetic sensor body 1. The basic structure of the magnetic field sensor usually includes a magnetic sensitive element 14, a signal processing circuit, a housing and a package, a connection interface 16, and a magnetic sensitive element. Element 14 is the core part of the magnetic field sensor, which is used to sense the changes in the surrounding magnetic field. Common magnetic sensitive elements 14 include Hall elements, magnetoresistive elements such as AMR, GMR, TMR, etc. These elements generate corresponding electrical signal outputs according to the changes in the magnetic field. The magnetic field sensor usually needs to amplify, filter, linearize and process the weak electrical signal generated by the magnetic sensitive element 14 for subsequent digital conversion or application. The signal processing circuit may include an amplifier, a filter, an A / D converter, etc. In order to protect the magnetic sensitive element 14 and the signal processing circuit, the magnetic field sensor is usually packaged in a shell. The material and structure of the shell should be able to reduce the impact of the external magnetic field on the sensor performance and provide To provide necessary mechanical protection, in order to facilitate connection and communication with other electronic devices, the magnetic field sensor is usually equipped with some connection interfaces 16, such as cable interfaces, digital communication interfaces, etc. The TMR sensor has very high precision and can accurately sense and measure tiny magnetic field changes. Due to the use of the tunnel magnetoresistance effect, the TMR sensor has extremely high sensitivity and can detect weak magnetic field signals. The TMR sensor has low power consumption when working, which helps to extend the service life of the equipment and reduce energy consumption. The TMR sensor is small in size and is easy to integrate into various devices to achieve a compact design. The TMR sensor has good temperature stability and can maintain stable performance under different temperature environments.
[0029] refer to Figures 1 to 4A card slot 6 is provided at the top of the magnetic sensor body 1, and a card block 8 matching the card slot 6 is fixedly connected to the bottom end of the protective cover 2. The card block 8 is clamped inside the card slot 6. The protective cover 2 is clamped to the top of the magnetic sensor body 1 through the card slot 6 and the card block 8. A handle 5 is fixedly connected to the top of the protective cover 2. The shape of the handle 5 is concave, and the shape of the corner of the handle 5 is arc-shaped. A limiting groove 7 is provided at the top of the magnetic sensor body 1, and a sealing ring 9 matching the limiting groove 7 is fixedly connected to the bottom end of the protective cover 2. The sealing ring 9 covers the inner side of the limiting groove 7, and the card block 8 is located close to the outer side of the sealing ring 9. The presence of the protective cover 2 can effectively protect the top of the magnetic sensor body 1, and can prevent the electronic components inside the magnetic sensor body 1 from being bumped. The sealing ring 9 can effectively seal the connection point between the magnetic sensor body 1 and the protective cover 2, and can prevent water from flowing into the magnetic sensor body 1 through the connection point between the two. The handle 5 can provide the user with a gripping point. When the protective cover 2 needs to be opened, the card block 8 can be pulled out of the card slot 6 through the gripping point provided by the handle 5, which is also convenient for the user to perform maintenance on the electronic components inside the magnetic sensor body 1 at a later time.
[0030] refer to Figure 1 A rectangular opening 3 is provided at the top of the protective cover 2, and the rectangular opening 3 is communicated with the interior of the magnetic sensor body 1. A transparent glass 4 is fixedly connected to the inner side of the rectangular opening 3, and the transparent glass 4 covers the inner side of the rectangular opening 3. The position of the transparent glass 4 is symmetrical to the position of the mounting plate 10. Due to the opening of the rectangular opening 3, the user can directly view the interior of the magnetic sensor body 1 through the transparent glass 4 without opening the protective cover 2, thereby facilitating the user to observe the electronic components inside the magnetic sensor body 1 at all times, and also effectively improving the safety protection of the electronic components inside the magnetic sensor body 1.
[0031] refer to Figure 2 and Figure 3A first screw hole 11 is provided at the top of the mounting plate 10. The first screw hole 11 penetrates the mounting plate 10 and the inner bottom end of the magnetic sensor body 1. The inner side of the first screw hole 11 is threadedly connected with a first bolt 12. The bottom end of the first bolt 12 is threadedly connected to the inside of the magnetic sensor body 1 through the first screw hole 11. The mounting plate 10 is threadedly connected to the inner bottom end of the magnetic sensor body 1 through the first bolt 12 and the first screw hole 11. A first slide groove 13 matching the mounting plate 10 is provided on the inner wall of the magnetic sensor body 1. The mounting plate 10 The outer wall of the mounting plate 10 is slidably connected to the inner side of the first slide groove 13. Since the mounting plate 10 is fixed by threads, when the user needs to maintain the electronic components on the top of the mounting plate 10 later, the protective cover 2 is first opened, and then the first bolt 12 is screwed out through the thread principle. Finally, the entire mounting plate 10 can be pulled out of the magnetic sensor body 1 through the first slide groove 13. The mounting plate 10 can bring out the electronic components fixed on the top together, which improves the efficiency of disassembly and assembly of the electronic components and is more conducive to the user's later inspection and maintenance of the electronic components.
[0032] refer to Figure 2 and Figure 3 and Figure 5 A second screw hole 18 is provided at the inner bottom end of the magnetic sensor body 1. The second screw holes 18 penetrate the magnetic sensor body 1 and the top of the leg 20. The inner side of the second screw hole 18 is threadedly connected with a second bolt 19. The bottom end of the second bolt 19 is threadedly connected to the inside of the leg 20 through the second screw hole 18. The leg 20 is threadedly connected to the bottom end of the magnetic sensor body 1 through the second screw hole 18 and the second bolt 19. The leg 20 is threadedly fixed to the four sides of the bottom end of the magnetic sensor body 1 near the corner. A circular groove 21 is provided at the bottom end of the leg 20. A rubber pad 22 is fixedly connected to the inner side of the circular groove 21. The rubber pad 22 covers On the inner side of the circular groove 21 of the cover, the position of the bottom end of the rubber pad 22 is on the same horizontal line as the position of the bottom end of the leg 20. Due to the existence of the leg 20, the leg 20 can effectively support the bottom end of the magnetic sensor body 1. The rubber pad 22 is a rubber product with good anti-slip ability and rubber shock absorption ability, thereby improving the stability of the placement of the leg 20 for a second time, thereby making the position of the magnetic sensor body 1 more stably fixed. When the leg 20 needs to be removed, the user can screw the second bolt 19 out of the second screw hole 18, thereby facilitating the user to perform individual disassembly and maintenance of the leg 20 at a later time.
[0033] refer to Figures 5 to 8The bottom end of the filter plate 24 is fixedly connected with a fixing block 28, and the shape of the fixing block 28 is L-shaped. The top of the fixing block 28 is attached to the bottom end of the magnetic sensor body 1. A third screw hole 29 is provided at the bottom end of the fixing block 28. The third screw hole 29 penetrates the fixing block 28 and the bottom end of the magnetic sensor body 1. The inner side of the third screw hole 29 is threadedly connected with a third bolt 30. The top of the third bolt 30 is threadedly connected to the inside of the magnetic sensor body 1 through the third screw hole 29. A second slide groove 27 matching the filter plate 24 is provided on the inner wall of the vent 23. The outer wall of the filter plate 24 is slidably connected to the inner side of the second slide groove 27. Due to the presence of the third bolt 30, the position of the filter plate 24 can be effectively fixed, and the filter plate 24 can be prevented from falling off. When the filter plate 24 needs to be removed, the third bolt 30 is first screwed out of the third screw hole 29, and then the filter plate 24 is directly pulled out through the second slide groove 27. At the same time, it is also convenient for the user to perform individual maintenance and cleaning of the filter plate 24 later.
[0034] Principle and advantages of use: When the magnetic sensor body 1 is running, the mutual circulation between the vent 23 and the square opening 17 can be beneficial to the effective ventilation and heat dissipation of the inside of the magnetic sensor body 1. The support frame 31 can support the bottom end of the magnetic sensor body 1. The opening of the strip opening 32 can prevent the vent 23 from being blocked by the installation point. The filter plate 24 can effectively filter the circulating air without hindering the normal ventilation of the vent 23, and can also effectively protect the inside of the vent 23. The dustproof cloth 26 can also block the dust and pollutants flowing out of the air without hindering the heat dissipation of the vent 23, thereby preventing the dust and pollutants in the air from being adsorbed on the surface of the electrical components and causing harm to them. The existence of the cover 2 can effectively protect the top of the magnetic sensor body 1, and can prevent the electronic components inside the magnetic sensor body 1 from being bumped. The sealing ring 9 can effectively seal the connection point between the magnetic sensor body 1 and the protective cover 2, and can prevent water from flowing into the magnetic sensor body 1 through the connection point between the two. The handle 5 can provide the user with a gripping point. When it is necessary to open the protective cover 2, the card block 8 can be pulled out of the card slot 6 through the gripping point provided by the handle 5. Therefore, it is also convenient for the user to perform maintenance on the electronic components inside the magnetic sensor body 1 at a later time. Due to the opening of the rectangular opening 3, the user can directly view the interior of the magnetic sensor body 1 through the transparent glass 4 without opening the protective cover 2. , so it is convenient for the user to observe the electronic components inside the magnetic sensor body 1 at all times, and at the same time, it also effectively improves the safety protection of the electronic components inside the magnetic sensor body 1. Because the mounting plate 10 is fixed by threads, when the user needs to maintain the electronic components on the top of the mounting plate 10 later, first open the protective cover 2, and then screw out the first bolt 12 through the thread principle, and finally the entire mounting plate 10 can be pulled out of the magnetic sensor body 1 through the first slide groove 13. The mounting plate 10 can bring out the electronic components fixedly installed on the top together, while improving the efficiency of disassembly and assembly of electronic components, it is also more conducive to the user's later inspection and maintenance of the electronic components. Due to the existence of the legs 20, the legs 20 can be used for the magnetic sensor body 1 is effectively supported, and the rubber pad 22 is a rubber product with good anti-slip and rubber shock-absorbing capabilities, thereby improving the stability of the position of the leg 20 for a second time, thereby making the position of the magnetic sensor body 1 more stable. When the leg 20 needs to be disassembled, the user can screw the second bolt 19 out of the second screw hole 18, thereby facilitating the user to perform a single disassembly and maintenance of the leg 20 at a later time. Due to the presence of the third bolt 30, the position of the filter plate 24 can be effectively fixed, and the filter plate 24 can be prevented from falling off. When the filter plate 24 needs to be disassembled, the third bolt 30 is first screwed out of the third screw hole 29, and then the filter plate 24 is directly pulled out through the second slide groove 27.
Claims
1. A high-precision magnetic sensor using TMR technology, comprising a magnetic sensor body, characterized in that: A protective cover is clamped on the top of the magnetic sensor body, and the protective cover covers the top of the magnetic sensor body. A mounting plate is threadedly connected to the inner bottom end of the magnetic sensor body. A magnetic sensitive element and a signal processing circuit module are fixedly installed on the top of the mounting plate. A connection interface is provided on one side of the magnetic sensor body. A vent is provided at the bottom end of the magnetic sensor body, and the vent is communicated with the inside of the magnetic sensor body. A square opening is provided at the top of the mounting plate, and the position of the square opening is symmetrical with the position of the vent. A filter plate is threadedly connected on the inner wall of the vent, and the filter plate covers the inner side of the vent. A sponge is fixedly connected to the bottom end of the vent, and a dustproof cloth is pasted and fixed to the bottom end of the sponge. The dustproof cloth covers the bottom end of the filter plate. A support frame is fixedly connected to the bottom end of the magnetic sensor body, and the position of the support frame is opposite to the position of the vent. A strip opening is provided on the outside of the support frame, and the strip opening passes through the support frame. A leg is threadedly connected to the bottom end of the magnetic sensor body.
2. The high-precision magnetic sensor using TMR technology according to claim 1, characterized in that: A card slot is provided at the top of the magnetic sensor body, a card block matching the card slot is fixedly connected to the bottom end of the protective cover, the card block is clamped inside the card slot, the protective cover is clamped to the top of the magnetic sensor body through the card slot and the card block, a handle is fixedly connected to the top of the protective cover, the handle is concave in shape, and the corners of the handle are arc-shaped.
3. The high-precision magnetic sensor using TMR technology according to claim 2, characterized in that: A limiting groove is provided at the top of the magnetic sensor body, a sealing ring matching the limiting groove is fixedly connected to the bottom end of the protective cover, the sealing ring covers the inner side of the limiting groove, and the clamping block is located close to the outer side of the sealing ring.
4. The high-precision magnetic sensor using TMR technology according to claim 1, characterized in that: A rectangular opening is provided at the top of the protective cover, the rectangular opening is communicated with the interior of the magnetic sensor body, a transparent glass is fixedly connected to the inner side of the rectangular opening, the transparent glass covers the inner side of the rectangular opening, and the position of the transparent glass is symmetrical to that of the mounting plate.
5. The high-precision magnetic sensor using TMR technology according to claim 1, characterized in that: A first screw hole is provided at the top of the mounting plate, and the first screw holes penetrate the mounting plate and the inner bottom end of the magnetic sensor body. A first bolt is threadedly connected to the inner side of the first screw hole, and the bottom end of the first bolt is threadedly connected to the inside of the magnetic sensor body through the first screw hole. The mounting plate is threadedly connected to the inner bottom end of the magnetic sensor body through the first bolt and the first screw hole.
6. The high-precision magnetic sensor using TMR technology according to claim 1, characterized in that: A first sliding groove matching the mounting plate is formed on the inner wall of the magnetic sensor body, and the outer wall of the mounting plate is slidably connected to the inner side of the first sliding groove.
7. The high-precision magnetic sensor using TMR technology according to claim 1, characterized in that: A second screw hole is provided at the inner bottom end of the magnetic sensor body, and the second screw holes penetrate the magnetic sensor body and the top end of the leg. A second bolt is threadedly connected to the inner side of the second screw hole, and the bottom end of the second bolt is threadedly connected to the inside of the leg through the second screw hole. The leg is threadedly connected to the bottom end of the magnetic sensor body through the second screw hole and the second bolt, and the leg is threadedly fixed to the four sides of the bottom end of the magnetic sensor body near the corners.
8. The high-precision magnetic sensor using TMR technology according to claim 7, characterized in that: A circular groove is formed at the bottom end of the supporting leg, a rubber pad is fixedly connected to the inner side of the circular groove, the rubber pad covers the inner side of the circular groove, and the bottom end of the rubber pad is on the same horizontal line as the bottom end of the supporting leg.
9. The high-precision magnetic sensor using TMR technology according to claim 1, characterized in that: The bottom end of the filter plate is fixedly connected with a fixing block, the shape of the fixing block is L-shaped, the top of the fixing block is in contact with the bottom end of the magnetic sensor body, the bottom end of the fixing block is provided with a third screw hole, the third screw hole penetrates the fixing block and the bottom end of the magnetic sensor body, the inner side of the third screw hole is threadedly connected with a third bolt, and the top end of the third bolt is threadedly connected to the inside of the magnetic sensor body through the third screw hole.
10. The high-precision magnetic sensor using TMR technology according to claim 9, characterized in that: A second slide groove matching the filter plate is provided on the inner wall of the vent, and the outer wall of the filter plate is slidably connected to the inner side of the second slide groove.