Small dual-redundancy wheel speed sensor

Abstract

The invention relates to the technical field of sensors, in particular to a small-sized dual-redundancy wheel speed sensor, which comprises a shell, an end cover, Hall integrated sensing components, a spring, a socket, a screw, a cover plate, a wire and a gasket, and is characterized in that the whole shell is cylindrical, an opening is formed in the middle of the shell, and the two Hall integrated sensing components are mounted in the shell; sensing elements of the Hall integrated sensing assemblies are installed outwards, end covers are arranged at the two ends of the shell, a spring is installed between the two Hall integrated sensing assemblies, the socket is installed on the shell through screws, the Hall integrated sensing assemblies are connected with the socket through wires, and the cover plate is arranged at an opening of the shell. The two Hall integrated sensing assemblies are arranged in the shell and are connected with the socket, so that the reliability and the detection precision of the sensor are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to a small dual-redundant wheel speed sensor. Background Art

[0002] Sensor technology has been widely used in many fields such as military technology, aerospace, detection technology, and vehicle engineering in various countries. The domestic sensor industry is developing rapidly, mainly used in industrial manufacturing, automotive products, electronic communications, and special equipment. Among them, industrial manufacturing and automotive products account for one-third of the market share. However, my country's sensors still have problems such as a small variety, poor quality, and relatively backward manufacturing process technology. At present, most units have successfully developed inductive position sensors and Hall-type wheel speed sensors, both of which have single-redundant outputs. They have been used in conjunction with multiple models and have achieved certain sensor design results. The reliability and stability of existing single-redundant sensors are relatively low. With the increasing demand for safety, environmental adaptability, and intelligence in aircraft, dual-redundant speed sensors will develop in the direction of greater efficiency, reliability, and intelligence in the sensor field, becoming an indispensable core component of aviation equipment. Summary of the Invention

[0003] In order to solve the problems mentioned in the above background technology, the present invention provides a small dual-redundant wheel speed sensor.

[0004] The present invention discloses the following technical solution: a small dual-redundant wheel speed sensor, comprising a housing, an end cap, a Hall integrated sensing component, a spring, a socket, a screw, a cover plate, a wire, and a washer. The housing is generally cylindrical and has an opening in the middle. Two Hall integrated sensing components are installed in the housing, with the sensing elements of the Hall integrated sensing components facing outward. End caps are provided at both ends of the housing. A spring is installed between the two Hall integrated sensing components. The socket is mounted on the housing by screws. The Hall integrated sensing component and the socket are connected by a wire. The cover plate is arranged at the opening of the housing. The Hall integrated sensing assembly includes a Hall element, a support, a signal processing board, a support washer and a power drive board. The Hall element is a sensing element, the Hall element is installed on the support, the three pins on the Hall element are welded to the signal processing board, the power drive board is installed on the inside of the shell, a support washer is provided between the power drive board and the signal processing board, and the signal processing board and the power drive board are connected by a wire. The Hall element, the support and the signal processing board are bonded and fixed together with epoxy resin, and washers are provided between the two ends of the spring and the power drive board.

[0005] Furthermore, a sealing gasket is provided between the socket and the housing.

[0006] Furthermore, a spring washer is provided between the screw and the socket.

[0007] Furthermore, the shell is made of an iron-nickel soft magnetic alloy material, and the end cover is made of a stainless steel material with strong corrosion resistance.

[0008] Furthermore, mounting bases for mounting sensors are provided on both sides of the shell. The mounting bases are located on both sides of the socket and are provided with mounting holes.

[0009] Furthermore, the end cover and the shell are welded into one body.

[0010] Beneficial effects: Compared with the prior art, the small dual-redundant wheel speed sensor of the present invention has two Hall integrated sensing components in one shell, and the two Hall integrated sensing components are connected to one socket, which greatly improves the reliability and detection accuracy of the sensor. The shell is a closed structure that can effectively avoid interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention; In the figure: 1-end cover, 2-Hall element, 3-signal processing board, 4-support washer, 5-power drive board, 6-washer, 7-cover, 8-spring, 9-wire, 10-sealing gasket, 11-socket, 12-spring washer, 13-screw, 14-support, 15-housing, 16-mounting base. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, a small dual-redundant wheel speed sensor includes a housing 15, an end cap 1, a Hall integrated sensing component, a spring 8, a socket 11, a screw 13, a cover plate 7, a wire 9 and a washer 6. The housing 15 is cylindrical in shape and has an opening in the middle. Two Hall integrated sensing components are installed in the housing 15, and the sensing elements of the Hall integrated sensing components are installed outward. End caps 1 are provided at both ends of the housing 15. A spring 8 is installed between the two Hall integrated sensing components. The socket 11 is installed on the housing 15 by screws 13. The Hall integrated sensing component and the socket are connected by a wire 9. The cover plate 7 is provided at the opening of the housing 15 to close the opening. The Hall integrated sensing assembly includes a Hall element 2, a support 14, a signal processing board 3, a support washer 4 and a power drive board 5. The Hall element 2 is a sensing element. The Hall element 2 is installed on the support 14. The three pins on the Hall element 2 are welded to the signal processing board 3. The power drive board 5 is installed on the inner side of the shell 15. A support washer 4 is provided between the power drive board 5 and the signal processing board 3 to avoid mutual interference between the components. The signal processing board 3 and the power drive board 5 are connected by a wire. The Hall element 2, the support 14 and the signal processing board 3 are bonded and fixed together with epoxy resin. Washers 6 are provided between the two ends of the spring 8 and the power drive board 5 to prevent the spring from directly contacting the power drive board 5 and interfering with the operation of the power drive board 5.

[0013] A sealing gasket 10 is provided between the socket 11 and the shell 15 to improve the sealing performance of the sensor. A spring washer 12 is provided between the screw 13 and the socket to prevent loosening. The shell 15 is made of iron-nickel soft magnetic alloy material, and the end cover 1 is made of corrosion-resistant stainless steel material to improve the magnetic permeability of the sensor and enhance the sensor detection reliability. Mounting seats 16 for mounting the sensor are also provided on both sides of the shell 15. The mounting seats 16 are located on both sides of the socket 11 and are provided with mounting holes. When the sensor is installed on the aircraft, the socket 11 is connected and the sensor can be fixed on the aircraft with only two screws. The installation is simple and the maintainability is good. The end cover 1 and the shell 15 are welded as one, so that a closed space is formed inside the sensor, thereby improving the anti-interference performance.

[0014] When producing this sensor, after connecting the various components in the Hall integrated sensing assembly into one, before installing the Hall integrated sensing assembly and other components in the shell 15, first weld one side end cover 1 to one end of the shell 15, and then install them in the order of the Hall integrated sensing assembly, gasket 6, spring 8, gasket 6, Hall integrated sensing assembly, and end cover 1, and connect the wire to the pinhole of the socket 11, use silicone rubber to fix the wire in the shell, inject silicone rubber from the opening of the shell 15, and then use two screws 13 to install the socket 11 on the shell 15, and after the silicone rubber is completely solidified, install the cover plate 7 at the opening of the shell 15, and weld the cover plate 7 to the shell 15 so that the inside of the shell 15 is in a completely closed state. In order to ensure the miniaturization of the dual-redundant wheel speed sensor, while meeting the functional performance of the dual-redundant wheel speed sensor, the length of the shell 15 can be reduced by adjusting the length of the spring 8, while also reducing the weight of the product, thereby achieving lightweighting.

[0015] Working principle: Utilizing the working principle of differential Hall element 2, when the gear or rotating sprocket installed on the wheel hub rotates, the Hall element 2 responds to the change in magnetic field strength, causing the Hall element 2 to be triggered, causing the level signal to change, and outputting a square wave to the power processor to resolve it into the speed of the computer wheel.

[0016] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A small dual-redundant wheel speed sensor, comprising a housing (15), an end cap (1), a Hall integrated sensing component, a spring (8), a socket (11), a screw (13), a cover (7), a wire (9) and a washer (6), characterized in that: The shell (15) is cylindrical in shape and has an opening in the middle. Two Hall integrated sensing components are installed in the shell (15). The sensing elements of the Hall integrated sensing components are installed outward. End covers (1) are provided at both ends of the shell (15). A spring (8) is installed between the two Hall integrated sensing components. The socket (11) is installed on the shell (15) by means of screws (13). The Hall integrated sensing component and the socket are connected by means of a wire (9). The cover plate (7) is provided at the opening of the shell (15). The Hall integrated sensing assembly comprises a Hall element (2), a support (14), a signal processing board (3), a support washer (4) and a power drive board (5), wherein the Hall element (2) is a sensing element, the Hall element (2) is mounted on the support (14), three pins on the Hall element (2) are welded to the signal processing board (3), the power drive board (5) is mounted on the inner side of the housing (15), a support washer (4) is provided between the power drive board (5) and the signal processing board (3), and the signal processing board (3) and the power drive board (5) are connected by a wire, wherein the Hall element (2), the support (14) and the signal processing board (3) are bonded and fixed as a whole by epoxy resin, and washers (6) are provided between the two ends of the spring (8) and the power drive board (5).

2. The small dual-redundant wheel speed sensor according to claim 1, characterized in that: A sealing gasket (10) is provided between the socket (11) and the housing (15).

3. The small dual-redundant wheel speed sensor according to claim 1, characterized in that: A spring washer (12) is provided between the screw (13) and the socket.

4. The small dual-redundant wheel speed sensor according to claim 1, characterized in that: The shell (15) is made of an iron-nickel soft magnetic alloy material, and the end cover (1) is made of a stainless steel material with strong corrosion resistance.

5. The small dual-redundant wheel speed sensor according to claim 1, characterized in that: Mounting seats (16) for mounting sensors are also provided on both sides of the housing (15). The mounting seats (16) are located on both sides of the socket (11), and mounting holes are provided on the mounting seats (16).

6. The small dual-redundant wheel speed sensor according to claim 1, characterized in that: The end cover (1) and the housing (15) are welded together as one body.

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