A highly integrated multi-functional angular displacement sensor

Abstract

The application discloses a kind of highly integrated multifunctional angular displacement sensors, including support partition chamber plate, inhibit conversion circuit module, angular displacement shell, angular displacement shell is equipped with sensing cavity inside, the bottom of sensing cavity is equipped with shaft hole frame, the shaft hole of shaft hole frame is equipped with angular displacement shaft body, the top end of angular displacement shaft body extends to the upper of shaft hole frame and is equipped with brush holder, the inner cavity wall of sensing cavity outside shaft hole frame is equipped with partition card ring, support partition chamber plate is installed on partition card ring, the space of support partition chamber plate below forms anti-interference closed cavity, and inhibit conversion circuit module is arranged in anti-interference closed cavity.There is beneficial effect in at: by convex hull structure, reduce wear, improve service life, rework cost is low, circuit module is firm, the degree of integration is high, installation space is greatly saved, especially suitable for modern compact equipment with limited space, with strong anti-interference ability and voltage suppression and other excellent power supply features.

Description

Technical Field

[0001] This invention relates to the field of angular displacement sensor devices, and in particular to a highly integrated multifunctional angular displacement sensor. Background Technology

[0002] In recent years, angular displacement conductive plastic potentiometers used in aviation, aerospace, and weaponry fields have required stable and reliable output signals. They are increasingly demanding high-voltage to low-voltage conversion capabilities, as well as the ability to independently meet electromagnetic compatibility (EMC) requirements, particularly power supply characteristics (independently meeting power surge, voltage spikes, and momentary power outages). This places even greater emphasis on newly developed angular displacement conductive plastic potentiometers. These new potentiometers, when installed on servo systems, must not only be stable and reliable, but also meet EMC and power supply requirements themselves. This eliminates the need for separately designed high-voltage to low-voltage conversion components or components that meet EMC and power supply requirements, thus reducing the burden on the entire installation system, improving its utilization rate, and meeting the miniaturization and lightweighting requirements of aviation, aerospace, and weaponry. In traditional conductive plastic potentiometers, the upper brush is fixed to the slip ring, which is then bonded to an insulating sleeve. The insulating sleeve, rotating shaft, and slip ring are tightly fitted together. When the potentiometer is working, the rotating shaft drives the insulating sleeve to rotate, which in turn drives the slip ring to rotate, further rotating the upper brush on the slip ring, thus achieving the potentiometer's signal conversion output. However, traditional angular displacement conductive plastic potentiometers cannot convert high voltage to low voltage output, failing to meet electromagnetic compatibility and power supply characteristics requirements. Furthermore, the resistive element has poor wear resistance, a short lifespan, and is prone to brush "lifting" phenomenon. Therefore, the design of a multifunctional angular displacement sensor that can convert high voltage to low voltage output signal and meet electromagnetic compatibility and power supply characteristics requirements is urgently needed. Summary of the Invention

[0003] The purpose of this invention is to provide a highly integrated, multifunctional angular displacement sensor in order to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions: A highly integrated multifunctional angular displacement sensor includes a supporting cavity plate, a suppression conversion circuit module, and an angular displacement housing. The angular displacement housing contains a sensing cavity, the bottom of which has a shaft hole frame. An angular displacement shaft is housed within the shaft hole of the shaft hole frame, and its top extends above the shaft hole frame and is fitted with a brush holder. A partition retainer is located on the inner wall of the sensing cavity outside the shaft hole frame. The supporting cavity plate is mounted on the partition retainer. An anti-interference enclosed cavity is formed below the supporting cavity plate. The suppression conversion circuit module is located within this anti-interference enclosed cavity. A resistor is located on the top surface of the supporting cavity plate. A convex-shaped brush is mounted on the brush holder. The convex-shaped brush includes a V-shaped portion and an arc-shaped convex brush head connected together, with the arc-shaped convex brush head contacting the resistor. The suppression conversion circuit module includes a suppression circuit unit and a filtering circuit unit.

[0005] Further, the suppression circuit unit includes an optocoupler U1 and a precision Zener diode U2. The emitter of the optocoupler U1 is connected to a field-effect transistor Q4, a Zener diode D1, a resistor R2, and a resistor R5. The other ends of the Zener diode D1 and the resistor R2 are both connected to the source of the field-effect transistor Q4. The other end of the resistor R5 is grounded. The anode of the optocoupler U1 is connected to the drain of the field-effect transistor Q4 through a resistor R3. A capacitor C1 is connected in parallel with the resistor R3. The cathode of the optocoupler U1 is connected to a Zener diode D2 and a capacitor C5. The other end of the Zener diode D2 is connected to the diode D5 and then grounded. The other end of the capacitor C5 is grounded. The source of the field-effect transistor Q4 is grounded through the transient suppression diode TVS. The reference terminal of the precision Zener diode U2 is connected to resistors R9 and R10 and capacitor C7 respectively. The other ends of resistors R9 and capacitor C7 are grounded. The other end of resistor R10 is connected to resistor R8. The other end of resistor R8 and the drain of the field-effect transistor Q4 are connected in parallel with resistors R6 and R7. The anode of the reference terminal of the precision Zener diode U2 is grounded. The filter circuit unit includes capacitors C8 and C9 connected in series.

[0006] Furthermore, the middle of the V-shaped portion on the side away from the arc-shaped convex brush head is welded to the brush holder by an anti-lifting solder joint piece.

[0007] Furthermore, the resistor is connected to the top surface of the supporting cavity plate by adhesive bonding, and the supporting cavity plate is fixed to the cavity plate retaining ring by screws. The top ring surface of the cavity plate retaining ring is also provided with a cavity plate adhesive layer.

[0008] Furthermore, the bottom surface of the supporting cavity plate is provided with a circuit mounting protrusion, and the suppression conversion circuit module is fixed to the circuit mounting protrusion by screws. The circuit mounting protrusion is provided with a circuit board adhesive layer.

[0009] Furthermore, the angular displacement housing includes a bottom housing and a top sealing housing. The top sealing housing is installed on the top of the bottom housing. The bottom housing is provided with a wire outlet hole, and the wire outlet hole is provided with a lead wire electrically connected to the suppression conversion circuit module.

[0010] Furthermore, the brush holder is provided with a holder limiting hole, and the top of the angular displacement shaft is provided with a limiting insertion end. The limiting insertion end is inserted into the holder limiting hole, and an insulating sleeve is provided between the limiting insertion end and the hole wall of the holder limiting hole.

[0011] Furthermore, the angular displacement shaft is rotatably mounted in the shaft hole via a bearing, and the bottom end of the angular displacement shaft extends to the outside of the angular displacement housing.

[0012] The beneficial effects are as follows: The highly integrated multifunctional angular displacement sensor described in this invention reduces wear and increases service life through its convex hull structure; The brush is subjected to uniform force, which greatly reduces the risk of the brush being lifted during the back-and-forth rotation. The low rework cost increases the robustness of the circuit module fixation, thereby enhancing the stability and reliability of voltage conversion; The high-voltage to low-voltage power supply circuit, signal conditioning, filtering and other functions are all integrated inside the sensor. The high degree of integration greatly saves installation space and is especially suitable for modern compact equipment with limited space. With its superior power supply characteristics such as strong anti-interference capability and voltage suppression, it provides a more reliable, easier-to-use, higher-performance, and lower-cost solution, perfectly meeting the stringent requirements of aviation, aerospace, weaponry and other fields for potentiometer intelligence, high reliability and strong anti-interference capability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of a highly integrated multifunctional angular displacement sensor according to the present invention; Figure 2 This is a top view of a highly integrated multifunctional angular displacement sensor described in this invention; Figure 3 This is a diagram of the unsealed highly integrated multifunctional angular displacement sensor described in this invention; Figure 4 This is a bottom structural diagram of the support cavity plate of a highly integrated multifunctional angular displacement sensor according to the present invention; Figure 5This is a structural diagram of the bottom housing of a highly integrated multifunctional angular displacement sensor according to the present invention; Figure 6 This is a schematic diagram of the convex-hull brush structure of a highly integrated multifunctional angular displacement sensor according to the present invention; Figure 7 This is a circuit diagram of the suppression unit of a highly integrated multifunctional angular displacement sensor described in this invention; Figure 8 This is a schematic diagram of the internal structure of a traditional angular displacement sensor; Figure 9 This is a schematic diagram of the traditional brush structure and its installation.

[0014] The annotations in the attached figures are explained as follows: 1. Supporting partition plate; 2. Suppression conversion circuit module, 21. Suppression circuit unit, 22. Filtering circuit unit, 23. Circuit mounting protrusion; 3. Angular displacement housing, 31. Bottom housing, 32. Top sealing housing, 33. Sensing cavity, 34. Shaft hole bracket, 35. Anti-interference sealed cavity, 36. Shaft hole, 37. Outer ear of housing, 38. Partition retainer ring; 4. Brush holder, 41. Holder limiting hole; 5. Convex-shaped brush, 51. V-shaped part, 52. Arc-shaped convex brush head; 6. Resistor; 7. Angular displacement shaft; 8. Insulating sleeve; 9. Bearing; 10. Lead wire; 11. Anti-lift solder joint piece; 12. Traditional circuit module; 13. Brush piece; 14. End pressure piece; 15. Bending head; 16. Leakage cavity. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0016] The following is combined with Figures 1 to 6 The highly integrated multifunctional angular displacement sensor provided in this embodiment will be further described as follows: Specific reference Figure 1-6 The embodiments of the present invention provide a highly integrated multifunctional angular displacement sensor, including a supporting cavity plate 1, a suppression conversion circuit module 2, and an angular displacement housing 3; An angular displacement housing 3 is provided with a sensing cavity 33. A shaft hole frame 34 is provided at the bottom of the sensing cavity 33. An angular displacement shaft 7 is provided in the shaft hole 36 of the shaft hole frame 34. The top of the angular displacement shaft 7 extends to the top of the shaft hole frame 34 and is equipped with a brush holder 4. A partition retainer 38 is provided on the inner wall of the sensing cavity 33 outside the shaft hole frame 34. A supporting partition plate 1 is installed on the partition retainer 38. The space below the supporting partition plate 1 forms an anti-interference closed cavity 35. The suppression conversion circuit module 2 is located in the anti-interference closed cavity 35. In this embodiment, the sensing cavity 33 is a fan-shaped cavity, and the angular displacement shaft 7 is located at the center of the fan-shaped cavity. When the angular displacement shaft 7 drives the brush holder 4 to rotate, the brush holder 4 swings in the top fan-shaped area of ​​the sensing cavity 33. The anti-interference enclosed cavity 35 is an enclosed cavity, which enhances the resistance to electromagnetic interference. After testing and verification, it can fully meet the requirements of electromagnetic compatibility test and power supply characteristics. The top surface of the supporting partition plate 1 is provided with a resistor 6, and the brush holder 4 is provided with a convex brush 5. The convex brush 5 includes a V-shaped part 51 connected together and an arc-shaped convex brush head 52. The arc-shaped convex brush head 52 contacts the resistor 6, making it convenient to brush and slide on the resistor 6. In this embodiment, the arc-shaped convex brush head 52 of the convex brush 5 makes contact friction on the resistor 6. The convex structure can greatly reduce the wear rate of the resistor 6 and enhance the wear resistance life of the resistor (increased from the original 1 million rotation test to 3 million times and above). Reference Figure 7 The suppression conversion circuit module 2 is equipped with a suppression circuit unit 21 and a filter circuit unit 22. The filter circuit unit 22 is shielded by a metal shell and is assembled on a printed circuit board. The components are soldered onto the printed circuit board to ensure the rationality of the layout of each component and part, which is also conducive to the soldering quality and can effectively avoid soldering errors. It is used for filtering during conducted emission to avoid conducted interference at the input port, improve the shielding effectiveness of the filter component, and ensure good grounding of the filter component. This reduces the radiated emission of the control loop to the external space, thereby meeting the relevant requirements of magnetic effect test and radio frequency sensitivity (radiation) test. The suppression circuit unit 21 can suppress surge voltage and spike voltage, and output low voltage after high input voltage, thereby improving the functionality of the angular displacement sensor. In addition to the units mentioned above, the suppression conversion circuit module 2 is also equipped with commonly used units such as DC-DC converter, reverse connection protection, overvoltage / undervoltage protection, and load drop protection.

[0017] like Figure 1 - Figure 8 As shown, embodiments of the present invention also disclose the following various more optimized specific structures: The suppression circuit unit 21 includes an optocoupler U1 and a precision Zener diode U2. The emitter of the optocoupler U1 is connected to a field-effect transistor Q4, a Zener diode D1, a resistor R2, and a resistor R5. The other ends of the Zener diode D1 and the resistor R2 are both connected to the source of the field-effect transistor Q4. The other end of the resistor R5 is grounded. The anode of the optocoupler U1 is connected to the drain of the field-effect transistor Q4 through a resistor R3. A capacitor C1 is connected in parallel with the resistor R3. The cathode of the optocoupler U1 is connected to a Zener diode D2 and a capacitor C5. The other end of the Zener diode D2 is connected to the diode D5 and then grounded. The other end of the capacitor C5 is grounded. The source of the field-effect transistor Q4 is grounded through a transient suppression diode TVS. The reference terminal of the precision Zener diode U2 is connected to resistors R9 and R10 and capacitor C7 respectively. The other ends of resistors R9 and capacitor C7 are grounded. The other end of resistor R10 is connected to resistor R8. The other end of resistor R8 and the drain of the field-effect transistor Q4 are connected in parallel with resistors R6 and R7. The anode of the reference terminal of the precision Zener diode U2 is grounded. In addition, the source of the field-effect transistor Q4 is connected to the positive input terminal VIN+, the negative input terminal VIN- is grounded, and a capacitor C2 is connected between the positive output terminal VOUT+ and the negative output terminal VOUT-. The cathode of the precision Zener diode U2 is connected to the positive output terminal VOUT+. When a 50V / 100ms surge occurs at the power input terminal, the suppression circuit unit 21 can suppress it to below 36V. The suppressed voltage supplies power to the subsequent circuit through resistors R6 and R7. After being regulated by TL431, it outputs a 10V voltage at the output terminal. When a 600V / 10μS spike voltage occurs at the power input terminal, the transient suppression diode TVS absorbs the spike voltage, clamping the input voltage to around 62V. Then, it is processed by the surge suppression and TL431 circuit, outputting a 10V voltage at the output terminal. Furthermore, the field-effect transistor Q4 and optocoupler U1 work together to suppress the inrush current. Resistor R3 is a current-limiting resistor. Capacitors C1, C2, and C5 are capacitors with a voltage rating of not less than 50V, and the actual operating voltage does not exceed 60% of their rated voltage. Capacitor C7 is a capacitor with a voltage rating of not less than 20V, and the actual operating voltage does not exceed 40% of its rated voltage. Optocoupler U1 will not work when there is no surge voltage. It is a low-power device and is widely used and verified in similar products. Precision Zener diode U2 is used as a reference in this embodiment. It is a non-power device, and its actual power output is less than 60% of its rated power.

[0018] The filter circuit unit 22 includes capacitors C8 and C9 connected in series. Capacitors C8 and C9 are located between the positive input terminal VIN+ and the negative input terminal VIN-. The withstand voltage of both capacitors C8 and C9 is 500V, which is greater than the requirement of 200V for the withstand voltage test. Electromagnetic interference within the functional module radiates into the external space through the structure of the functional module, electromagnetic interference within the functional module radiates into the external space through the joint between the electrical connector of the functional module and the functional module housing, and electromagnetic interference within the functional module is emitted into the external space through the test cable, which can easily lead to excessive radiation emissions of this type of product. Among them, RE101 is radiated by magnetic field at 25Hz to 100kHz, and RE102 is radiated by electric field at 10kHz to 18GHz. It can be seen that the interference is mainly conducted interference at the input port, which is emitted outward through the input line. At the same time, the input line is also an antenna. When the common-mode current flows through the input line, it will emit electromagnetic energy into space and generate radiated interference. The filter circuit unit 22 reduces the conducted emission and also greatly reduces the radiated emission at the input port. In addition, the filter circuit unit 22 can be shielded with a metal shell to improve the shielding effectiveness of the filter components and ensure good grounding of the filter components. This reduces the radiation emission of the motor control circuit to the external space, thereby meeting the relevant requirements of magnetic effect test and radio frequency sensitivity (radiation) test. The joints of the shell and through holes should be minimized to reduce electromagnetic leakage and improve environmental adaptability. All other test cables except those used in the electrical system must be shielded, and the shielding mesh on the outside of the cable must be connected to the metal shell of the system at 360°. It must have a good electrical connection with the shell of the system. Unshielded cables must be connected to the filter components.

[0019] On the V-shaped part 51, the middle of the V-side away from the arc-shaped convex brush head 52 is welded to the brush holder 4 by anti-lifting solder joint piece 11. By selecting the solder joint, the force is evenly distributed, which greatly reduces the risk of the brush being lifted during the back and forth rotation and avoids the "lifting phenomenon" when the brush body is pressed against the contact friction resistor 6.

[0020] The resistor 6 is attached to the top surface of the supporting cavity plate 1 by adhesive bonding. The supporting cavity plate 1 is fixed to the partition retainer 38 by screws. The top ring surface of the partition retainer 38 is also provided with a partition adhesive layer to reinforce the supporting cavity plate 1. Since the top surface of the partition retainer 38 has a narrow structure, it is extremely easy to disassemble even if it is glued. If the resistor 6 has a quality problem, the resistor with the support plate can be replaced without scrapping other parts. Only the supporting cavity plate 1 and the resistor 6 are scrapped, resulting in low rework costs.

[0021] The bottom surface of the supporting cavity plate 1 is provided with a circuit mounting protrusion 23. The suppression conversion circuit module 2 is fixed to the circuit mounting protrusion 23 by screws. The circuit mounting protrusion 23 is provided with a circuit board adhesive layer. The circuit mounting protrusion 23 and the suppression conversion circuit module 2 also form a small area of ​​adhesion, which facilitates reinforcement and disassembly, increases the firmness of the suppression conversion circuit module 2, and thus enhances the stability and reliability of voltage conversion.

[0022] The angular displacement housing 3 includes a bottom housing 31 and a top sealing housing 32. The top sealing housing 32 is installed on the top of the bottom housing 31. The bottom housing 31 is provided with a wire outlet hole 39. The wire outlet hole 39 is provided with a lead wire 10 that is electrically connected to the suppression conversion circuit module 2. The lead wire and the hole wall are properly shielded.

[0023] The brush holder 4 is provided with a holder limiting hole 41, and the top of the angular displacement shaft 7 is provided with a limiting insertion end. The limiting insertion end is inserted into the holder limiting hole 41, and an insulating sleeve 8 is provided between the limiting insertion end and the hole wall of the holder limiting hole 41.

[0024] The angular displacement shaft 7 is rotatably mounted in the shaft hole 36 via the bearing 9, and the bottom end of the angular displacement shaft 7 extends to the outside of the angular displacement housing 3.

[0025] like Figure 1 - Figure 7 The highly integrated, multifunctional angular displacement sensor shown has significant advantages over traditional angular displacement sensors, as follows: Reference Figure 8-9 The brush mechanism of a traditional angular displacement sensor includes a V-shaped brush 13 and a bending head 15. The bending head 15 rotates in contact with the traditional resistive element, which causes greater wear and reduces the service life of the resistive element. However, the highly integrated multifunctional angular displacement sensor described in this embodiment reduces wear and increases service life through a convex hull structure. Furthermore, in the traditional case, the end pressure plate 14 holds the V-shaped brush 13 end. If the brush rotates too fast during rotation, the brush may be lifted from the solder plate position, leading to abnormal potentiometer output. In this embodiment, the V-shaped part 51 is welded to the brush holder 4 through the anti-lift solder point plate 11 at the middle of one side. By selecting the solder point, the force is evenly distributed, which greatly reduces the risk of the brush being lifted during the back and forth rotation and avoids the "lifting phenomenon" when the brush body is pressed against the contact friction resistor 6. Traditional resistors are directly glued to the outer casing, resulting in a large adhesive contact area. If the resistor has a quality problem, it cannot be removed, and the component with the outer casing must be scrapped, leading to high rework and manufacturing costs. In this embodiment, however, the resistor with a support plate can be replaced without scrapping other parts. Only the support cavity plate 1 and the resistor 6 are scrapped, resulting in low rework costs and greater robustness. Traditionally, the circuit module 12 is placed directly inside the housing, with its bottom surface in contact with the housing. The circuit module is then attached to the housing with tape. This fixing method carries the risk that the electronic components may experience dielectric breakdown with the housing. Furthermore, the tape used to fix the circuit conversion module is relatively susceptible to environmental influences during different product usage environments, resulting in poor fixation of the circuit conversion module and negatively impacting the stability and reliability of voltage conversion. In this embodiment, however, the module is first bonded with adhesive and then secured with screws equipped with locking washers, increasing the module's fixation strength and thus enhancing the stability and reliability of voltage conversion. Traditional angular displacement sensors have a large leakage magnetic cavity 16 next to the conventional resistive element, which cannot achieve electromagnetic interference resistance. However, the anti-interference sealed cavity 35 in this embodiment enhances the electromagnetic interference resistance. After testing, it has been verified that it can fully meet the requirements of electromagnetic compatibility test and power supply characteristics. Traditional circuit module 12 does not have circuits and components for solving electromagnetic compatibility tests, and it does not have the ability to resist electromagnetic interference. When installed in the sensor, it cannot meet the requirements of electromagnetic compatibility and power supply characteristics. However, the suppression conversion circuit module 2 in this embodiment has electromagnetic compatibility and integrates the high-voltage to low-voltage power supply circuit, signal conditioning, EMC filtering, digital processing and other functions into the sensor.

[0026] In summary, the highly integrated multi-functional angular displacement sensor described in this embodiment integrates the high-voltage to low-voltage power supply circuit, signal conditioning, EMC filtering, and other functions into the sensor itself, achieving integrated signal processing. It eliminates the need for complex external circuit design and can directly provide a high-voltage power supply to obtain a stable and standard low-voltage output signal, greatly saving installation space. It is particularly suitable for modern compact equipment with limited space. It integrates common-mode choke, filter capacitor, transient suppression diode and other components, and has a strong immunity to electromagnetic interference from spatial radiation and wire conduction (such as noise generated by mobile phones, motors and relays), ensuring that the output signal remains pure and stable in complex electromagnetic environments. The internal filter circuit can effectively suppress the high-frequency noise generated by the sensor itself from being emitted outward, so as to avoid interfering with other electronic systems in the vehicle or equipment. It has high precision and stability.

[0027] The aforementioned structure, designed as a multifunctional angular displacement sensor that converts high voltage to low voltage output signals and meets electromagnetic compatibility and power supply characteristics requirements, is not only stable and reliable when installed on a servo system, but also eliminates the need for separate high-voltage to low-voltage conversion components or other components that meet these requirements. This reduces the burden on the entire installation system, improves its utilization rate, and meets the miniaturization and lightweight requirements of aviation, aerospace, and weaponry. It saves manufacturing costs for enterprises, creates more profit, and will inevitably bring greater economic benefits. This intelligent sensing terminal, capable of reliable operation in complex and harsh environments, ultimately provides crucial assurance for improving the safety, accuracy, reliability, and intelligence of the entire control system. It offers users a more reliable, user-friendly, high-performance, and lower-cost solution, perfectly meeting the stringent requirements of modern industry, aviation, aerospace, weaponry, and automotive electronics for intelligent, highly reliable, and highly anti-interference sensors.

[0028] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A highly integrated multifunctional angular displacement sensor, characterized in that: The device includes a supporting partition plate, a suppression conversion circuit module, and an angular displacement housing. The angular displacement housing contains a sensing cavity, the bottom of which has a shaft hole frame. An angular displacement shaft is housed within the shaft hole of the shaft hole frame, and its top extends above the shaft hole frame and is fitted with a brush holder. A partition retainer is located on the inner wall of the sensing cavity outside the shaft hole frame. The supporting partition plate is mounted on the partition retainer. The space below the supporting partition plate forms an anti-interference enclosed cavity. The suppression conversion circuit module is located within this anti-interference enclosed cavity. A resistor is located on the top surface of the supporting partition plate. The brush holder has a convex-shaped brush, which includes a V-shaped portion and an arc-shaped convex brush head connected together. The arc-shaped convex brush head contacts the resistor. The suppression conversion circuit module includes a suppression circuit unit and a filter circuit unit. The middle of the V-shaped portion away from the arc-shaped convex brush head is welded to the brush holder using an anti-lift solder joint.

2. The highly integrated multifunctional angular displacement sensor according to claim 1, characterized in that: The suppression circuit unit includes an optocoupler U1 and a precision Zener diode U2. The emitter of the optocoupler U1 is connected to a field-effect transistor Q4, a Zener diode D1, a resistor R2, and a resistor R5. The other ends of the Zener diode D1 and the resistor R2 are both connected to the source of the field-effect transistor Q4. The other end of the resistor R5 is grounded. The anode of the optocoupler U1 is connected to the drain of the field-effect transistor Q4 through a resistor R3. A capacitor C1 is connected in parallel with the resistor R3. The cathode of the optocoupler U1 is connected to a Zener diode D2 and a capacitor C5. The other end of the Zener diode D2 is connected to the diode D5 and then grounded. The other end of the capacitor C5 is grounded. The source of the field-effect transistor Q4 is grounded through a transient voltage suppressor diode (TVS). The reference terminal of the precision Zener diode U2 is connected to resistors R9 and R10 and capacitor C7 respectively. The other ends of resistors R9 and capacitor C7 are grounded. The other end of resistor R10 is connected to resistor R8. The other end of resistor R8 and the drain of the field-effect transistor Q4 are connected in parallel with resistors R6 and R7. The anode of the reference terminal of the precision Zener diode U2 is grounded. The filter circuit unit includes capacitors C8 and C9 connected in series.

3. The highly integrated multifunctional angular displacement sensor according to claim 1, characterized in that: The resistor is attached to the top surface of the supporting cavity plate by adhesive bonding. The supporting cavity plate is fixed to the cavity plate retaining ring by screws. The top ring surface of the cavity plate retaining ring is also provided with a cavity plate adhesive layer.

4. The highly integrated multifunctional angular displacement sensor according to claim 1, characterized in that: The bottom surface of the supporting cavity plate is provided with a circuit mounting protrusion. The suppression conversion circuit module is fixed to the circuit mounting protrusion by screws. The circuit mounting protrusion is provided with a circuit board adhesive layer.

5. The highly integrated multifunctional angular displacement sensor according to claim 1, characterized in that: The angular displacement housing includes a bottom housing and a top sealing housing. The top sealing housing is installed on the top of the bottom housing. The bottom housing has a wire outlet hole, and the wire outlet hole contains a lead wire that is electrically connected to the suppression conversion circuit module.

6. The highly integrated multifunctional angular displacement sensor according to claim 1, characterized in that: The brush holder is provided with a holder limiting hole, and the top of the angular displacement shaft is provided with a limiting insertion end. The limiting insertion end is inserted into the holder limiting hole, and an insulating sleeve is provided between the limiting insertion end and the hole wall of the holder limiting hole.

7. The highly integrated multifunctional angular displacement sensor according to claim 1, characterized in that: The angular displacement shaft is rotatably mounted in the shaft hole via a bearing, and the bottom end of the angular displacement shaft extends to the outside of the angular displacement housing.

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