Angle Detection Device and Angle Detection Method Using Hall Sensors

Abstract

The present invention relates to the field of electronic technology, and discloses an angle detection device and an angle detection method using a Hall sensor, including an angle detection mechanism, and the angle detection mechanism includes a detection unit. For the angle detection device and the angle detection method using a Hall sensor, by installing the angle detection mechanism on the seat rotation rod, the angle detection mechanism can rotate along with the seat adjustment. There are steel plates fixed on both sides of the rotating seat of the vehicle seat. When the angle detection mechanism rotates, the magnet magnetizes the steel plate into an S pole. When the current passes perpendicularly through the semiconductor in the external magnetic field, the carriers deflect to generate an additional electric field and potential difference. The rotation of the magnet causes the magnetic field to change, and the change in the magnetic field sensed by the Hall chip leads to a change in the output voltage. By analyzing and processing the output voltage, the rotation angle of the magnet can be determined, realizing the detection of angle changes.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and specifically to an angle detection device and an angle detection method using a Hall sensor. Background Art

[0002] In the current automotive field, there are mainly two ways to adjust the seat angle of a car. One is the mechanical way, and the other is the electronic way. To adjust the seat angle mechanically, traditional mechanical structures are used to change the seat angle. This way is common in some relatively basic models. The electronic way, on the other hand, uses an electronic control system to adjust the seat angle, which has higher accuracy and convenience and is widely used in some mid - to - high - end models.

[0003] However, both the mechanical way and the electronic way have a common problem, that is, they cannot accurately detect the specific angle of the seat. This means that when the driver or passenger adjusts the seat angle, they can only rely on their own feelings to judge whether the seat has reached the ideal angle, rather than being able to make precise adjustments through specific numerical values or indications. This situation may lead to inaccurate adjustment of the seat angle, affecting the comfort and safety of riding. During a long - term driving process, if the seat angle is not appropriate, it may cause the driver to be fatigued and increase the driving risk. Therefore, how to solve the problem that the specific angle of the car seat cannot be detected is an important issue that automobile manufacturers and related technology R & D personnel need to pay attention to and solve. Therefore, there is an urgent need for an angle detection device and an angle detection method using a Hall sensor. Summary of the Invention

[0004] The purpose of the present invention is to provide an angle detection device and an angle detection method using a Hall sensor to solve the problems raised in the above background art.

[0005] To solve the above - mentioned technical problems, the present invention provides the following technical solution: An angle detection device using a Hall sensor includes a Hall chip, a detection unit, and a fixing unit. The Hall chip is used to sense the change in angle through electromagnetic induction;

[0006] The detection unit includes a housing. A chute is provided on the inner wall of the housing. A clamping block is fixedly connected to the inner wall of the housing. A PCB board is slidably connected to the inner wall of the chute. The bottom end of the PCB board is fixedly connected to a Hall chip. A magnet is slidably connected to the inner wall of the clamping block. The inner wall of the magnet is slidably connected to the surface of the PCB board. One end of the magnet away from the PCB board is electrically connected to a first wire. One end of the magnet away from the PCB board is electrically connected to a second wire. A protective sleeve is fixedly connected to the surface of the first wire. A hot melt adhesive is fixedly connected to the inner wall of the housing. One end of the first wire away from the housing is fixedly connected to a wire harness assembly. A sheath is fixedly connected to the bottom end of the wire harness assembly.

[0007] The fixing unit is arranged at the bottom end of the detection unit. The fixing unit is used to fix the angle detection mechanism so that the angle detection mechanism can work at a fixed position.

[0008] By installing the angle detection mechanism on the rotating rod of the seat, the angle detection mechanism can rotate along with the adjustment of the seat. Steel plates are often provided on both sides of the rotating seat of the vehicle seat for fixation. Along with the rotation of the angle detection mechanism, the magnet inside the housing will magnetize the steel plate into the S pole. Based on the Hall effect, when an electric current passes through a semiconductor perpendicular to an external magnetic field, the carriers are deflected, and an additional electric field will be generated in the direction perpendicular to the current and the magnetic field, thereby generating a potential difference at both ends of the semiconductor. When the magnet rotates, the direction of the magnetic field will change, and the magnetic field sensed by the Hall chip will also change accordingly, resulting in a change in the output voltage. By analyzing and processing the output voltage, the rotation angle of the magnet can be determined, and thus the detection of the angle change can be realized.

[0009] As a preferred implementation manner, the inner wall of the hot melt adhesive is fixedly connected to the first wire. The inner wall of the hot melt adhesive is fixedly connected to the second wire. One end of the second wire away from the magnet is fixedly connected to the wire harness assembly. The surface of the second wire is fixedly connected to the protective sleeve.

[0010] The inner wall of the hot melt adhesive is fixedly connected to the first wire, and the inner wall of the hot melt adhesive is fixedly connected to the second wire. Through this connection method, the hot melt adhesive can effectively fix the first wire and the second wire inside it. As an adhesive, the hot melt adhesive has good bonding performance, which can ensure a firm and reliable connection between the wire and the hot melt adhesive. At the same time, this fixed connection method helps to improve the stability and safety of the circuit, reducing the risk of circuit failures caused by wire loosening. In addition, the hot melt adhesive also has certain insulation properties, which can prevent short circuits between wires to a certain extent, further ensuring the normal operation of the circuit. The end of the second wire far from the magnet is fixedly connected to the wire harness assembly. Through this connection method, the stable transmission of current and the accurate transmission of signals are ensured. At the same time, the surface of the second wire is fixedly connected to the protective sleeve, which can effectively protect the second wire, reduce the damage to the wire caused by external factors, and enhance the durability and safety of the wire. The material of the protective sleeve usually has good insulation properties and wear resistance, which can prevent the second wire from being worn, scratched, and short-circuited, thereby improving the reliability and stability of the entire wire harness system.

[0011] As a preferred embodiment, the fixing unit includes a connecting seat, the inner wall of the connecting seat is fixedly connected with a bearing, the inner wall of the bearing is fixedly connected with a connecting ring, one end of the connecting ring far from the connecting seat is fixedly connected with a limiting ring, one end of the limiting ring far from the connecting ring is fixedly connected with a shrinking block, the surface of the shrinking block is provided with threads, and the surface of the shrinking block is threadedly connected with a limiting sleeve.

[0012] By sleeving the slot hole opened on the surface of the outer shell on the rotating rod of the seat, the surface of the shrinking block is provided with threads. By rotating the limiting sleeve, the shrinking block can be extruded, so that the anti-slip pad fixedly connected to the inner wall of the shrinking block shrinks along with it, and the rotating rod of the seat is extruded, so that it will not slide and shift on the rotating rod during use, thus fixing the distance between the steel plates and increasing the accuracy of detection. Also, through the fixed connection of the connecting ring and the bearing, the angle detection mechanism can still rotate along with the adjustment of the seat, improving the accuracy of the device.

[0013] As a preferred embodiment, an anti-slip pad is fixedly connected to the inner wall of the shrinking block, and one end of the connecting seat far from the limiting ring is fixedly connected to the outer shell.

[0014] An anti-slip pad is fixedly connected to the inner wall of the shrinking block. By setting the anti-slip pad, the friction force can be increased, and the stability of the device can be improved. When the threads provided on the surface of the shrinking block drive the limiting sleeve to rotate, the shrinking block can be extruded, so that the anti-slip pad fixedly connected to the inner wall of the shrinking block shrinks along with it, thereby extruding the rotating rod of the seat. One end of the connecting seat far from the limiting ring is fixedly connected to the outer shell, ensuring the structural stability of the entire device, enabling the angle detection mechanism to work more reliably during use, and improving the overall performance of the device.

[0015] As a preferred embodiment, four shrinkage blocks are provided, and the four shrinkage blocks are distributed in a circumferential array around the surface of the limit ring.

[0016] On the other hand, the angle detection method of the angle detection device includes the following steps: S1: Trigger the sensor: As the seat angle is adjusted, the Hall device will be adjusted along with the seat. During the adjustment process, the steel plates on both sides of the seat approach the magnet in the housing and are magnetized into S poles. At this time, the magnetic induction lines will pass through the steel plates and pass through the Hall device, triggering the Hall device;

[0017] S2: Current switching: Once the steel plate leaves the effective area of the Hall chip, the current switches from the low-current state to the high-current state;

[0018] S3: Current output: The Hall chip moves along the movement track, and outputs 2 - 7 mA at the position 5 degrees behind and the normal position, and outputs 12 - 17 mA at the position 6 degrees in front.

[0019] As a preferred embodiment, in S1, when the seat angle is adjusted so that the steel plates on both sides of the seat approach the magnet and are magnetized into S, the magnetic induction lines will pass through the steel plates and pass through the Hall device, triggering the Hall device. The Hall sensor can be used in cooperation with the motor to enable the driver to easily achieve automatic control and adjustment of the seat position, improve the comfort of the seat and the driving experience. The rotation speed of the motor and the position information of the seat can be detected by the Hall sensor installed on the motor, and after shaping and amplification, they are sent to the single-chip microcomputer to form the speed feedback of the system.

[0020] As a preferred embodiment, in S2 current switching, based on the Hall effect, when the current passes through the semiconductor perpendicular to the external magnetic field, the carriers are deflected, and an additional electric field is generated in the direction perpendicular to the current and the magnetic field, thereby generating a potential difference at both ends of the semiconductor. When the magnet rotates, the direction of the magnetic field changes, and the magnetic field sensed by the Hall chip also changes accordingly, resulting in a change in the output voltage. By analyzing and processing the output voltage, the rotation angle of the magnet can be determined, and thus the detection of the angle change can be realized.

[0021] As a preferred embodiment, in the S3 current output, when the size of the metal object is less than 0.3 mm at its minimum and the Hall sensor is offset 0.5 mm to the right; the Hall sensor will switch signals at less than 6°, specifically at 5.3°. To meet the requirement of at least 6°, the design is to program the Hall chip to compensate by 0.7°, that is, the signal will switch at a position with a total distance of 0.8 mm. When the sizes of the metal object and the Hall sensor are the design theoretical values; the Hall sensor will just switch signals at 6°. Adding the 0.7° signal compensated by the Hall chip programming, the signal will switch at 6.7°, specifically at a position offset by 0.47 mm. When the size of the metal object is greater than 0.3 mm at its maximum and the Hall sensor is offset 0.5 mm to the left; the Hall sensor will switch signals at 6.6°. Adding the 0.7° compensated by the Hall chip programming, that is, a total distance of 0.8 mm, the signal will switch at 7.3°, specifically at a position of 1.6 mm.

[0022] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0023] First, when the present invention is in use, by installing the angle detection mechanism on the rotating rod of the seat, the angle detection mechanism can rotate along with the seat adjustment. Steel plates are often provided on both sides of the rotating seat of the vehicle seat for fixation. Along with the rotation of the angle detection mechanism, the magnet inside the housing will magnetize the steel plate into the S pole. Based on the Hall effect, when an electric current passes through a semiconductor perpendicular to an external magnetic field, the charge carriers are deflected, and an additional electric field will be generated in the direction perpendicular to the current and the magnetic field, thereby generating a potential difference at both ends of the semiconductor. When the magnet rotates, the direction of the magnetic field will change, and the magnetic field sensed by the Hall chip will also change accordingly, resulting in a change in the output voltage. By analyzing and processing the output voltage, the rotation angle of the magnet can be determined, and thus the detection of the angle change can be realized.

[0024] Second, during the use of the present invention, it can be used in cooperation with steel plates of different sizes on both sides of different seat bases. When the size of the steel plate is the smallest, less than 0.3 mm, and the Hall sensor is offset 0.5 mm to the right; the Hall sensor will switch signals when it is less than 6°, specifically 5.3°. In order to meet the requirement of at least 6°, the design is to program the Hall chip to compensate by 0.7°, that is, the signal will switch at a total distance of 0.8 mm. When the size of the steel plate and the Hall sensor are the design theoretical values; the Hall sensor will just switch signals at 6°. Adding the 0.7° signal compensated by the Hall chip programming, the signal will switch at 6.7°, specifically at a position offset by 0.47 mm. When the size of the steel plate is the largest, greater than 0.3 mm and the Hall sensor is offset 0.5 mm to the left; the Hall sensor will switch signals at 6.6°. Adding the 0.7° compensated by the Hall chip programming, that is, a total distance of 0.8 mm, the signal will switch at 7.3°, specifically at a position of 1.6 mm, making the applicable range of the device wider.

[0025] Third, when the present invention is in use, the slot holes opened on the surface of the outer shell can be sleeved on the rotating rod of the seat. The surface of the shrinkage block is provided with threads. By rotating the connecting limit sleeve, the shrinkage block can be squeezed, so that the inner wall of the shrinkage block is fixedly connected with the anti-slip pad and shrinks, squeezing the seat rotating rod. By increasing the pressure and the roughness of the friction surface, the angle detection mechanism is limited, so that it will not slide and shift on the rotating rod during use, thereby fixing the distance between the steel plates and increasing the accuracy of detection. Also, through the fixed connection of the connecting ring and the bearing, the angle detection mechanism can still rotate along with the seat adjustment, improving the accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is an exploded view of a part of the present invention;

[0028] Figure 3 is an exploded bottom view of a part of the present invention;

[0029] Figure 4 is a schematic diagram of the internal structure of a part of the present invention;

[0030] Figure 5 is a disassembled schematic diagram of a part of the present invention;

[0031] Figure 6 is a disassembled schematic diagram of the fixing unit of the present invention;

[0032] Figure 7 is a side view schematic diagram of the fixing unit of the present invention.

[0033] Legend Explanation:

[0034] 1. Angle detection mechanism;

[0035] 10. Detection unit; 101. Housing; 102. Protective sleeve; 103. First wire; 104. Second wire; 105. Harness assembly; 106. Sheath; 107. Hot melt adhesive; 108. Magnet; 109. PCB board; 110. Hall chip; 111. Slide groove; 112. Block

[0036] 20. Fixing unit; 201. Connecting seat; 202. Bearing; 203. Limit ring; 204. Limit sleeve; 205. Shrinkage block; 206. Anti-slip pad; 207. Connecting ring Specific implementation mode

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Embodiment: As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 shown, the present invention provides a technical solution: an angle detection device applying a Hall sensor, including a Hall chip 110, a detection unit 10 and a fixing unit 20. The Hall chip 110 is used to sense the change of the angle through electromagnetic induction;

[0039] The detection unit 10 includes a housing 101. A slide groove 111 is formed on the inner wall of the housing 101. A block 112 is fixedly connected to the inner wall of the housing 101. A PCB board 109 is slidably connected to the inner wall of the slide groove 111. The bottom end of the PCB board 109 is fixedly connected to the Hall chip 110. A magnet 108 is slidably connected to the inner wall of the block 112. The inner wall of the magnet 108 is slidably connected to the surface of the PCB board 109. One end of the magnet 108 away from the PCB board 109 is electrically connected to a first wire 103. One end of the magnet 108 away from the PCB board 109 is electrically connected to a second wire 104. A protective sleeve 102 is fixedly connected to the surface of the first wire 103. A hot melt adhesive 107 is fixedly connected to the inner wall of the housing 101. One end of the first wire 103 away from the housing 101 is fixedly connected to a harness assembly 105. The bottom end of the harness assembly 105 is fixedly connected to a sheath 106;

[0040] The angle detection mechanism 1 further includes a fixing unit 20. The fixing unit 20 is arranged at the bottom end of the detection unit 10. The fixing unit 20 is used to fix the angle detection mechanism 1, so that the angle detection mechanism 1 can work at a fixed position.

[0041] The inner wall of the hot melt adhesive 107 is fixedly connected to the first wire 103, and the inner wall of the hot melt adhesive 107 is fixedly connected to the second wire 104. One end of the second wire 104 away from the magnet 108 is fixedly connected to the wire harness assembly 105, and the surface of the second wire 104 is fixedly connected to the protective sleeve 102.

[0042] The fixing unit 20 includes a connection seat 201. A bearing 202 is fixedly connected to the inner wall of the connection seat 201. A connection ring 207 is fixedly connected to the inner wall of the bearing 202. A limiting ring 203 is fixedly connected to one end of the connection ring 207 away from the connection seat 201. A contraction block 205 is fixedly connected to one end of the limiting ring 203 away from the connection ring 207. Threads are provided on the surface of the contraction block 205, and a limiting sleeve 204 is threadedly connected to the surface of the contraction block 205.

[0043] An anti-slip pad 206 is fixedly connected to the inner wall of the contraction block 205. One end of the connection seat 201 away from the limiting ring 203 is fixedly connected to the outer shell 101.

[0044] Four contraction blocks 205 are provided, and the four contraction blocks 205 are distributed in a circumferential array around the surface of the limiting ring 203.

[0045] On the other hand, the angle detection method of the angle detection device includes the following steps: S1: Trigger the sensor: As the seat angle is adjusted, the Hall device will be adjusted along with the seat. During the adjustment process, the steel plates on both sides of the seat approach the magnet 108 in the outer shell 101 and are magnetized into S poles. At this time, the magnetic induction lines will pass through the steel plates and pass through the Hall device to trigger the Hall device;

[0046] S2: Current switching: Once the steel plate leaves the effective area of the Hall chip 110, the current switches from the low current state to the high current state;

[0047] S3: Current output: The Hall chip 110 moves along the movement track, and outputs 2 - 7 mA at the position 5 degrees behind and the normal position, and outputs 12 - 17 mA at the position 6 degrees in front.

[0048] In the S1 trigger sensor, when the seat angle is adjusted so that the steel plates on both sides of the seat approach the magnet 108 and are magnetized to the S pole, the magnetic induction lines will pass through the steel plates and pass through the Hall device, triggering the Hall device. The Hall sensor can be used in conjunction with the motor to enable the driver to easily achieve automatic control and adjustment of the seat position, improving the comfort of the seat and the driving experience. The rotational speed of the motor and the position information of the seat can be detected by the Hall sensor installed on the motor, and after shaping and amplification, they are sent to the single-chip microcomputer to form the speed feedback of the system.

[0049] In the S2 current switching, based on the Hall effect, when the current passes through the semiconductor perpendicular to the external magnetic field, the carriers are deflected, and an additional electric field is generated in the direction perpendicular to the current and the magnetic field, resulting in a potential difference across the two ends of the semiconductor. When the magnet rotates, the direction of the magnetic field changes, and the magnetic field sensed by the Hall chip 110 also changes accordingly, leading to a change in the output voltage. By analyzing and processing the output voltage, the rotation angle of the magnet can be determined, and thus the detection of the angle change can be achieved.

[0050] In the S3 current output, when the size of the metal object is less than 0.3 mm at its minimum and the Hall sensor is offset 0.5 mm to the right; the Hall sensor will switch signals at less than 6°, specifically 5.3°. To meet the requirement of at least 6°, the design programs the Hall chip 110 to compensate by 0.7°, that is, the signal switches at a total distance of 0.8 mm. When the size of the metal object and the size of the Hall sensor are the design theoretical values; the Hall sensor will just switch signals at 6°. Adding the 0.7° signal compensated by the Hall chip 110, the signal switches at 6.7°, specifically at the position of offset 0.47 mm. When the size of the metal object is greater than 0.3 mm at its maximum and the Hall sensor is offset 0.5 mm to the left; the Hall sensor will switch signals at 6.6°. Adding the 0.7° compensated by the Hall chip 110, that is, a total distance of 0.8 mm, the signal switches at 7.3°, specifically at the position of 1.6 mm.

[0051] In the S3 current output, when the size of the metal object is the smallest and less than 0.3 mm, and the Hall sensor is offset 0.5 mm to the right; the Hall sensor will switch signals at less than 6°, specifically at 5.3°. To meet the requirement of at least 6°, the design programs the Hall chip to compensate by 0.7°, that is, the signal switches at a total distance of 0.8 mm. When the size of the metal object and the size of the Hall sensor are the design theoretical values; the Hall sensor will just switch signals at 6°. Adding the 0.7° signal compensated by the Hall chip programming, the switch occurs at 6.7°, specifically at a position offset by 0.47 mm. When the size of the metal object is the largest and greater than 0.3 mm and the Hall sensor is offset 0.5 mm to the left; the Hall sensor will switch signals at 6.6°. Adding the 0.7° compensated by the Hall chip programming, that is, a total distance of 0.8 mm, the signal is at 7.3°.

[0052] Working principle: During use, by installing the housing 101 of the angle detection mechanism 1 on the rotating rod of the seat, the angle detection mechanism 1 can rotate along with the seat adjustment. Steel plates are often provided on both sides of the rotating seat of the vehicle seat for fixation. Along with the rotation of the angle detection mechanism 1, the magnet 108 inside the housing 101 will magnetize the steel plate into the S pole. Based on the Hall effect, when an electric current passes through a semiconductor perpendicular to an external magnetic field, the carriers are deflected, and an additional electric field is generated in the direction perpendicular to the current and the magnetic field, thus generating a potential difference at both ends of the semiconductor. When the magnet rotates, the direction of the magnetic field changes, and the magnetic field sensed by the Hall chip 110 also changes accordingly, resulting in a change in the output voltage. By analyzing and processing the output voltage, the rotation angle of the magnet can be determined, and thus the detection of the angle change can be achieved;

[0053] In addition, the present device can be used in cooperation with steel plates of different sizes on both sides of different seat bases. When the size of the steel plate is the smallest, less than 0.3 mm, and the Hall sensor is offset 0.5 mm to the right; the Hall sensor will switch signals when it is less than 6°, specifically 5.3°. In order to meet the requirement of at least 6°, the design is to program the Hall chip 110 to compensate for 0.7°, that is, the signal will switch at a position with a total distance of 0.8 mm. When the size of the steel plate and the size of the Hall sensor are the design theoretical values; the Hall sensor will just switch signals at 6°. Adding the 0.7° signal compensated by the Hall chip 110, the signal will switch at 6.7°, specifically at a position offset by 0.47 mm. When the size of the steel plate is the largest, greater than 0.3 mm and the Hall sensor is offset 0.5 mm to the left; the Hall sensor will switch signals at 6.6°. Adding the 0.7° compensated by the Hall chip 110, that is, a total distance of 0.8 mm, the signal will switch at 7.3°, specifically at a position of 1.6 mm, making the applicable range of the device wider. And by sleeving the slot holes opened on the surface of the outer shell 101 on the rotating rod of the seat, the surface of the shrinkage block 205 is provided with threads. Rotating the connecting limit sleeve 204 can squeeze the shrinkage block 205, so that the anti-slip pad 206 fixedly connected to the inner wall of the shrinkage block 205 will shrink along with it and squeeze the seat rotating rod. By increasing the pressure and the roughness of the friction surface, the angle detection mechanism 1 is limited, so that it will not slide and shift on the rotating rod during use, thereby fixing the distance between the steel plates and increasing the accuracy of detection. Also, through the fixed connection of the connecting ring 207 and the bearing 202, the angle detection mechanism 1 can still rotate along with the adjustment of the seat, improving the accuracy of the device.

[0054] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An angle detection device using a Hall sensor, characterized in that: It comprises a Hall chip (110), a detection unit (10) and a fixing unit (20), wherein the Hall chip (110) is used to sense angle changes through electromagnetic induction; The detection unit (10) comprises a housing (101), the inner wall of the housing (101) is provided with a slide groove (111), the inner wall of the housing (101) is fixedly connected to a clamping block (112), the inner wall of the slide groove (111) is slidably connected to a PCB (109), the bottom end of the PCB (109) is fixedly connected to a Hall chip (110), the inner wall of the clamping block (112) is slidably connected to a magnet (108), the inner wall of the magnet (108) is slidably connected to the surface of the PCB (109), and the magnet (1 08) One end of the magnet (108) away from the PCB (109) is electrically connected to a wire 1 (103), one end of the magnet (108) away from the PCB (109) is electrically connected to a wire 2 (104), the surface of the wire 1 (103) is fixedly connected to a protective cover (102), the inner wall of the housing (101) is fixedly connected to a hot melt adhesive (107), one end of the wire 1 (103) away from the housing (101) is fixedly connected to a wiring harness assembly (105), and the bottom end of the wiring harness assembly (105) is fixedly connected to a sheath (106); The fixing unit (20) is arranged at the bottom end of the detection unit (10), and the fixing unit (20) is used to fix the angle detection mechanism (1) so that the angle detection mechanism (1) can work at a fixed position; The fixing unit (20) comprises a connecting seat (201), the inner wall of the connecting seat (201) is fixedly connected to a bearing (202), the inner wall of the bearing (202) is fixedly connected to a connecting ring (207), one end of the connecting ring (207) away from the connecting seat (201) is fixedly connected to a limiting ring (203), one end of the limiting ring (203) away from the connecting ring (207) is fixedly connected to a shrinking block (205), a surface of the shrinking block (205) is provided with a thread, and the surface of the shrinking block (205) is threadedly connected to a limiting sleeve (204).

2. The angle detection device using a Hall sensor according to claim 1, characterized in that: The inner wall of the hot melt adhesive (107) is fixedly connected to the first wire (103), the inner wall of the hot melt adhesive (107) is fixedly connected to the second wire (104), the end of the second wire (104) away from the magnet (108) is fixedly connected to the wiring harness assembly (105), and the surface of the second wire (104) is fixedly connected to the protective cover (102).

3. The angle detection device using a Hall sensor according to claim 1, characterized in that: An anti-slip pad (206) is fixedly connected to the inner wall of the shrink block (205), and one end of the connecting seat (201) away from the limiting ring (203) is fixedly connected to the outer shell (101).

4. The angle detection device using a Hall sensor according to claim 1, characterized in that: Four contraction blocks (205) are provided, and the four contraction blocks (205) are distributed in a circular array around the surface of the limiting ring (203).

5. An angle detection method based on any one of the angle detection devices of claims 2 to 4, characterized in that: The following steps are involved: S1: Trigger sensor: As the seat angle is adjusted, the Hall device will adjust the angle along with the seat. During the adjustment process, the steel plates on both sides of the seat close to the magnet (108) in the housing (101) are magnetized to the S pole. At this time, the magnetic flux lines will pass through the steel plates and through the Hall device, triggering the Hall device. S2: Current switching: once the steel plate leaves the effective area of ​​the Hall chip (110), the current switches from a low current state to a high current state; S3: Current output: The Hall chip (110) moves along the motion trajectory, outputting 2-7 mA at the 5 degree rear position and the normal position, and outputting 12-17 mA at the 6 degree front position.

6. The angle detection method of the angle detection device according to claim 5, characterized in that: In the S1 trigger sensor, when the seat angle is adjusted so that the steel plates on both sides of the seat are close to the magnet (108) and are magnetized to S, the magnetic flux lines will pass through the steel plates and through the Hall device, triggering the Hall device. The Hall sensor can be used in conjunction with the motor to allow the driver to easily achieve automatic control and adjustment of the seat position, thereby improving the comfort of the seat and the driving experience. The speed of the motor and the position information of the seat can be detected by the Hall sensor installed on the motor, and sent to the single-chip microcomputer after shaping and amplification to form the speed feedback of the system.

7. The angle detection method of the angle detection device according to claim 5, characterized in that: In the S2 current switching, based on the Hall effect, when the current passes through the semiconductor perpendicular to the external magnetic field, the carriers are deflected, and an additional electric field is generated in a direction perpendicular to the current and the magnetic field, thereby generating a potential difference at both ends of the semiconductor. When the magnet rotates, the direction of the magnetic field changes, and the magnetic field sensed by the Hall chip (110) also changes accordingly, resulting in a change in the output voltage. By analyzing and processing the output voltage, the rotation angle of the magnet can be determined, thereby realizing the detection of the angle change.

8. The angle detection method of the angle detection device according to claim 5, characterized in that: In the S3 current output, when the metal object size is the smallest and is less than 0.3 mm, and the Hall sensor is offset to the right by 0.5 mm, the Hall sensor will switch the signal at less than 6°, specifically 5.3°. In order to meet the minimum 6° requirement, the Hall chip (110) is programmed to compensate 0.7°, that is, the total distance is 0.8 mm. When the metal object size and the Hall sensor size are the designed theoretical values, the Hall sensor will switch the signal at 6°, and the 0.7° signal compensated by the Hall chip (110) will be switched at 6.7°, specifically 0.47 mm offset. When the metal object size is the largest and is greater than 0.3 mm, and the Hall sensor is offset to the left by 0.5 mm, the Hall sensor will switch the signal at 6.6°, and the 0.7° signal compensated by the Hall chip (110) will be switched at 7.3°, specifically 1.6 mm.

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