CN214325220U

CN214325220U - Two-dimensional absolute position steering wheel corner sensor

Info

Publication number: CN214325220U
Application number: CN202023319757.7U
Authority: CN
Inventors: 朱继安; 匡青云; 陈婷
Original assignee: Chongqing Vocational and Technical University of Mechatronics
Current assignee: Chongqing Vocational and Technical University of Mechatronics
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-01
Anticipated expiration: 2030-12-31

Abstract

The utility model belongs to the technical field of automobile sensor, a two-dimensional absolute position steering wheel corner sensor is disclosed, including vertical coding dish, horizontal coding dish and sensor housing, vertical coding dish is connected with the automobile steering shaft, vertical coding dish is connected with horizontal coding dish, the automobile steering shaft wears to locate sensor housing, vertical coding dish and horizontal coding dish all locate sensor housing's inboard, vertical coding dish and horizontal coding dish all are equipped with the code channel, the code channel all includes printing opacity sector and shading sector, printing opacity sector and shading sector alternate distribution, printing opacity sector and shading sector angle equal, sensor housing's inboard is connected with vertical PCB board and horizontal PCB board, vertical PCB board is connected with vertical opto-coupler element, horizontal PCB board is connected with horizontal opto-coupler element; the utility model provides a prior art steering wheel corner sensor radial dimension great, the structure is complicated and the inconvenient problem of installation, be applicable to the corner detection of car steering wheel.

Description

Two-dimensional absolute position steering wheel corner sensor

Technical Field

The utility model relates to an automobile sensor technical field especially relates to an absolute position steering wheel corner sensor of two dimension.

Background

Along with the development of social economy and the improvement of science and technology, the types of automobiles are more and more, and the functions of the automobiles are more and more complete, so that a convenient and comfortable riding and driving journey is provided for people; the steering wheel angle sensor is a component of a vehicle stability control system, is convenient for a driver to correctly judge the steering angle of the steering wheel, and is an important component for safe driving and comfortable driving; a steering wheel angle sensor is generally mounted on a steering shaft of a steering column, when a driver rotates a steering wheel to drive the steering shaft to rotate, the steering wheel angle sensor detects the rotating direction and the rotating angle of the steering shaft, and a control unit arranged on a vehicle controls the operation of relevant parts of the vehicle according to the rotating direction angle of the steering shaft detected by the steering wheel sensor, such as controlling the irradiation range of a headlamp of the vehicle according to the rotating direction angle of the steering shaft; the structure of the existing steering wheel angle sensor mostly adopts a photoelectric coding principle, in order to detect the rotating direction and the rotating angle of a steering shaft, a plurality of groups of one-dimensional code channels are generally arranged in the radial direction of a coding disc, a light source and a photosensitive element are arranged corresponding to the code channels, and corresponding digital codes are output through the receiving condition of the photosensitive element to light, so that the rotating direction and the rotating angle of the steering shaft are obtained; but the steering wheel angle sensor with the structure has large radial sensing size, complex structure and inconvenient installation on a steering shaft.

SUMMERY OF THE UTILITY MODEL

The utility model provides an absolute position steering wheel corner sensor of two dimension to solve the great, complicated and the inconvenient problem of installation of prior art steering wheel corner sensor radial dimension.

In order to achieve the above object, the present invention provides the following technical solutions:

the utility model provides a basic technical scheme is: a two-dimensional absolute position steering wheel corner sensor comprises a vertical coding disc, a horizontal coding disc and a sensor shell, wherein the vertical coding disc is connected with a steering shaft of an automobile, the horizontal coding disc is connected with the vertical coding disc, the steering shaft of the automobile is arranged on the sensor shell in a penetrating way, the vertical coding disc and the horizontal coding disc are arranged on the inner side of the sensor shell, the vertical coding disc is provided with a vertical code channel, the horizontal coding disc is provided with a horizontal code channel, the vertical code channel and the horizontal code channel respectively comprise a light transmitting sector and a light shading sector, the light transmitting sector and the light shading sector are alternately distributed, the light transmitting sector and the light shading sector have equal angles, the sensor shell is connected with a vertical PCB and a horizontal PCB, the vertical PCB is connected with a vertical optical coupling element, and the vertical optical coupling element is correspondingly arranged with the vertical code channel, the horizontal PCB board is connected with a horizontal optical coupling element, the horizontal optical coupling element is arranged corresponding to the horizontal code channel, and the vertical optical coupling element and the horizontal optical coupling element form an absolute encoder.

The principle of the basic technical scheme is as follows: the vertical coding disc is connected with the automobile steering shaft, the horizontal coding disc is connected with the vertical coding disc, the horizontal coding disc and the vertical coding disc rotate together with the automobile steering shaft, the vertical PCB and the horizontal PCB are both connected with the sensor shell, the vertical optical coupling element is connected with the vertical PCB, the horizontal optical coupling element is connected with the horizontal PCB, when the automobile steering shaft rotates relative to the sensor shell, the vertical optical coupling element and the horizontal optical coupling element are static relative to the sensor shell, the vertical optical coupling element and the horizontal optical coupling element respectively convert corresponding level signals according to the illumination conditions of the corresponding code channel light transmitting sector and the light shading sector, a circuit board element arranged on the PCB forms pulse output according to the level signals of the optical coupling element, and the rotating direction and angle of the steering shaft are obtained according to the pulse output.

The beneficial effects of the basic technical scheme are as follows: the one-dimensional absolute code is divided into two-dimensional absolute codes of horizontal code and vertical code, the absolute rotation angle of the steering wheel can be directly read, and the detection precision of the steering wheel is high; meanwhile, the two-dimensional absolute code reduces the size of the corner sensor, is convenient to install on an automobile steering shaft, solves the problems of large radial size, complex structure and inconvenient installation of the steering wheel corner sensor in the prior art, and has good practicability and economical efficiency.

Preferably, the inner circumferential surface of the vertical encoding disk is connected with the steering shaft of the automobile through a key.

Through the arrangement, the key connection is simple and reliable, and the vertical coding disc is ensured to rotate along with the automobile steering shaft.

Preferably, the upper side of the vertical coding disc is provided with two protrusions, the lower side of the horizontal coding disc is provided with two grooves, and the protrusions are matched with the grooves.

Through the arrangement, the two bulges of the vertical coding disc are in fit connection with the two grooves of the horizontal coding disc, the positioning is accurate, and meanwhile, the horizontal coding disc is effectively ensured to be concentric and synchronous with the vertical coding disc and the automobile steering shaft.

Preferably, the vertical code disc is provided with external teeth, and the horizontal code disc is provided with internal teeth, and the external teeth are meshed with the internal teeth.

Through the arrangement, the vertical coding disc, the horizontal coding disc and the automobile steering shaft are ensured to concentrically and synchronously rotate in a mode of mutual meshing of the teeth.

Preferably, the vertical optical coupling element is U-shaped, and the horizontal optical coupling element is arc-shaped U-shaped.

Through the arrangement, the U-shaped optical coupling elements are distributed on two sides of the code channel, the illumination conditions of the light-transmitting sector and the light-shading sector are received more accurately and comprehensively, the output level signal is more accurate, and the detection precision of the steering wheel corner is further improved.

Preferably, n groups of vertical code channels are arranged on the vertical coding disc, n is greater than or equal to two, n vertical optical coupling elements are also arranged, and the n vertical optical coupling elements are arranged corresponding to the n groups of vertical code channels.

Through the arrangement, n-bit vertical codes are obtained, and the detection precision of the steering wheel in the vertical direction is high.

Preferably, m groups of horizontal code channels are arranged on the horizontal coding disc, m is greater than or equal to two, m horizontal optical coupling elements are also arranged, and m horizontal optical coupling elements and m groups of horizontal code channels are correspondingly arranged.

Through the arrangement, m-bit horizontal codes are obtained, and the detection precision of the steering wheel in the horizontal direction is high.

Preferably, n pieces of the vertical optical coupling elements and m pieces of the horizontal optical coupling elements form an n + m-bit absolute code encoder.

Through the arrangement, the one-dimensional n + m-bit absolute code is split into the two-dimensional n + m-bit absolute code of the m-bit horizontal code and the n-bit vertical code, so that the structure of the sensor is simplified, the size of the corner sensor is reduced, and the mounting of the corner sensor on the automobile steering shaft is facilitated.

Drawings

Fig. 1 is a cross-sectional view of a two-dimensional absolute position steering wheel angle sensor of the present invention;

fig. 2 is a schematic view of the photoelectric detection of the horizontal encoder disk of the two-dimensional absolute position steering wheel angle sensor of the present invention;

FIG. 3 is a partial view of A-A of FIG. 2;

fig. 4 is a schematic diagram of the horizontal encoding disc code of the two-dimensional absolute position steering wheel angle sensor of the present invention;

fig. 5 is a schematic diagram of the vertical encoder disk encoding of the two-dimensional absolute position steering wheel angle sensor of the present invention;

fig. 6 is a schematic diagram of a vertical encoding detection signal of a two-dimensional absolute position steering wheel angle sensor according to the present invention;

the names of corresponding labels in the drawings are:

the automobile steering system comprises a vertical coding disc 10, a vertical PCB 11, a vertical light coupling element 12, a protrusion 13, a vertical code channel 14, a horizontal coding disc 20, a horizontal PCB 21, a horizontal light coupling element 22, a groove 23, a horizontal code channel 24, a water sensor shell 30 and an automobile steering shaft 40.

Detailed Description

The invention will be described in further detail with reference to the following drawings and embodiments:

as shown in fig. 1 to 5, a two-dimensional absolute position steering wheel rotation angle sensor comprises a vertical encoding disk 10, a horizontal encoding disk 20 and a sensor housing 30, wherein the inner circumferential surface of the vertical encoding disk 10 is fixedly connected with an automobile steering shaft 40 through a key, two protrusions 13 are arranged on the upper side of the vertical encoding disk 10, two grooves 23 are arranged on the lower side of the horizontal encoding disk 20, the horizontal encoding disk 20 is in fit connection with the vertical encoding disk 10 through the two protrusions 13 and the grooves 23, the automobile steering shaft 40 penetrates through the sensor housing 30, the vertical encoding disk 10 and the horizontal encoding disk 20 are both arranged on the inner side of the sensor housing 30, the vertical encoding disk 10 is provided with three groups of vertical code channels 14, the horizontal encoding disk 20 is provided with three groups of horizontal code channels 24, the vertical code channels 14 and the horizontal code channels 24 both comprise light-transmitting sectors and light-shielding sectors, the light-transmitting sectors and the light-shielding sectors are alternately distributed, and the angles of the light-transmitting sectors and the light-shielding sectors are equal, sensor housing 30's lateral wall is fixed to bond has perpendicular PCB board 11, sensor housing 30's upper wall is fixed to bond has horizontal PCB board 21, perpendicular PCB board 11 is fixed to bond has three perpendicular opto-coupler elements 12 that are the U type, three perpendicular opto-coupler elements 12 of group correspond the setting with three perpendicular yardage canals 14 of group, horizontal PCB board 21 is fixed to bond has three horizontal opto-coupler elements 22 that are the arc U type, three horizontal opto-coupler elements 22 correspond the setting with three horizontal yardage canals 24 of group, three perpendicular opto-coupler elements 12 constitute six absolute encoder with three horizontal opto-coupler elements 22.

The specific implementation process is as follows:

the inner circumferential surface of the vertical coding disc 10 is fixedly connected with an automobile steering shaft 40 through a key, the horizontal coding disc 20 and the vertical coding disc 10 are in fit connection with a groove 23 through a protrusion 13, the horizontal coding disc 20 and the vertical coding disc 10 concentrically and synchronously rotate along with the automobile steering shaft 40, the vertical PCB 11 and the horizontal PCB 21 are fixedly bonded with a sensor shell 30, the vertical optical coupling element 12 is fixedly bonded with the vertical PCB 11, the horizontal optical coupling element 22 is fixedly bonded with the horizontal PCB 21, the automobile steering shaft 40 rotates relative to the sensor shell 30 when the automobile steering wheel rotates, the vertical optical coupling element 12 and the horizontal optical coupling element 22 are stationary relative to the sensor shell 30, the vertical optical coupling element 12 and the horizontal optical coupling element 22 respectively convert corresponding level signals according to the illumination conditions of a light transmitting sector and a light shielding sector of a corresponding code channel, a circuit board element arranged on the PCB forms pulse output according to the level signals of the optical coupling element, as shown in fig. 6, three vertical optical coupler elements 12 simultaneously generate pulse outputs, three vertical optical coupler elements 12 respectively generate pulse a, pulse B and pulse C, a processing circuit on the vertical PCB 11 forms a subdivision code of a horizontal code according to the pulse a, the pulse B and the pulse C, and detects the steering and the rotation angle of the steering wheel in cooperation with a horizontal code of a main detection sector, and similarly, the horizontal optical coupler element 22 also generates a corresponding pulse output, for example, the horizontal code of the main sector read by the horizontal optical coupler element 22 is 110, the sector subdivision vertical code of the vertical optical coupler element 12 is 101, and the horizontal code 110 and the vertical code 101 are synthesized into a two-dimensional code 110101 of the rotation angle of the steering wheel, so as to obtain 64 rotation angle codes of the steering wheel, and meet the actual requirements of the rotation angle detection of the steering wheel.

The above description is only an example of the present invention, and the common general knowledge of the known specific technical solutions or characteristics in the solutions is not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. A two-dimensional absolute position steering wheel angle sensor, comprising: the automobile steering wheel sensor comprises a vertical coding disc (10), a horizontal coding disc (20) and a sensor shell (30), wherein the vertical coding disc (10) is connected with an automobile steering shaft (40), the horizontal coding disc (20) is connected with the vertical coding disc (10), the automobile steering shaft (40) penetrates through the sensor shell (30), the vertical coding disc (10) and the horizontal coding disc (20) are arranged on the inner side of the sensor shell (30), the vertical coding disc (10) is provided with a vertical code channel (14), the horizontal coding disc (20) is provided with a horizontal code channel (24), the vertical code channel (14) and the horizontal code channel (24) respectively comprise light-transmitting sectors and shading sectors, the light-transmitting sectors and the shading sectors are alternately distributed, the angles of the light-transmitting sectors and the shading sectors are equal, and the sensor shell (30) is connected with a vertical PCB (11) and a horizontal PCB (21), perpendicular PCB board (11) is connected with perpendicular opto-coupler element (12), perpendicular opto-coupler element (12) with perpendicular sign indicating number way (14) corresponds the setting, horizontal opto-coupler element (22) are connected with in horizontal PCB board (21), horizontal opto-coupler element (22) with horizontal sign indicating number way (24) corresponds the setting, perpendicular opto-coupler element (12) with horizontal opto-coupler element (22) constitute absolute encoder.

2. A two-dimensional absolute position steering wheel angle sensor according to claim 1, wherein: the inner circumferential surface of the vertical coding disc (10) is connected with the automobile steering shaft (40) through a key.

3. A two-dimensional absolute position steering wheel angle sensor according to claim 2, wherein: the upper side of the vertical coding disc (10) is provided with two bulges (13), the lower side of the horizontal coding disc (20) is provided with two grooves (23), and the bulges (13) are matched with the grooves (23).

4. A two-dimensional absolute position steering wheel angle sensor according to claim 2, wherein: the vertical coding disc (10) is provided with external teeth, the horizontal coding disc (20) is provided with internal teeth, and the external teeth are meshed with the internal teeth.

5. A two-dimensional absolute position steering wheel angle sensor according to claim 1, wherein: the vertical optical coupling element (12) is U-shaped, and the horizontal optical coupling element (22) is arc-shaped U-shaped.

6. A two-dimensional absolute position steering wheel angle sensor according to claim 5, wherein: the vertical coding disc (10) is provided with n groups of vertical code channels (14), n is larger than or equal to two, the vertical optical coupling element (12) is also provided with n pieces, and the n pieces of the vertical optical coupling element (12) and the n groups of the vertical code channels (14) are correspondingly arranged.

7. A two-dimensional absolute position steering wheel angle sensor according to claim 6, wherein: horizontal code dish (20) are equipped with m and organize horizontal code way (24), m more than or equal to two, horizontal opto-coupler element (22) also have m, m horizontal opto-coupler element (22) and m group horizontal code way (24) correspond the setting.

8. A two-dimensional absolute position steering wheel angle sensor according to claim 7, wherein: n vertical optical coupling elements (12) and m horizontal optical coupling elements (22) form an n + m absolute code encoder.