Steering wheel motor control system

Abstract

The utility model discloses a steering wheel motor control system which comprises a steering wheel body. The limiting sensor is arranged on the steering wheel body; the direction wheel motor is arranged in a cross beam for fixing the direction wheel body, and the direction wheel motor is in meshed connection with the direction wheel body through a gear; the motor controller is used for controlling the steering wheel motor; a steering wheel body; and the orthogonal encoder is connected with the steering wheel body, and the orthogonal encoder is electrically connected with the limiting sensor and the motor controller. According to the utility model, the orthogonal encoder and the limiting sensor are matched for use, so that the steering wheel can be ensured to be always in a safe operation range, and meanwhile, mechanical damage caused by excessive rotation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, and particularly relates to a steering wheel motor control system. Background Art

[0002] With the development of the automobile industry, the electric power steering system (EPS) has been widely used in vehicles. The traditional mechanical steering system has been gradually replaced by an electronically controlled system to improve steering accuracy and driving comfort.

[0003] In the application of the current motor control system in autonomous driving, when the steering wheel exceeds the maximum allowable rotation angle, mechanical damage may occur due to excessive rotation, increasing the maintenance cost. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a steering wheel motor control system to solve the above problems.

[0005] The utility model specifically adopts the following technical solutions to achieve the above purpose:

[0006] A steering wheel motor control system includes a steering wheel body;

[0007] A limit sensor is arranged on the steering wheel body;

[0008] A steering wheel motor is arranged in a crossbeam for fixing the steering wheel body, and the steering wheel motor is connected to the steering wheel body through gear meshing;

[0009] A motor controller is used to control the steering wheel motor;

[0010] A steering wheel body; and:

[0011] An orthogonal encoder connected to the steering wheel body, and the orthogonal encoder is electrically connected to the limit sensor and the motor controller.

[0012] As a further description of the above technical solution, it further includes a vehicle control unit, and the vehicle control unit is electrically connected to the motor controller and the encoder.

[0013] As a further description of the above technical solution, the limit sensor is a sensor with 0-5V analog signal input, the limit sensor is used to detect the current position of the steering wheel, and the limit sensor is used to transmit a signal to the vehicle control unit.

[0014] As a further description of the above technical solution, the steering wheel body is arranged at the center of the crossbeam, and the limit sensor is arranged above the rotating shaft of the steering wheel body.

[0015] As a further description of the above technical solution, a large gear is connected to the rotating shaft of the steering wheel body, a small gear is connected to the steering wheel motor, and the large gear and the small gear are meshed and driven by gears.

[0016] As a further description of the above technical solution, the quadrature encoder is an encoder powered by 24V, and the quadrature encoder is used to detect the rotation direction and angle of the steering wheel body in real time.

[0017] As a further description of the above technical solution, the vehicle control unit is connected to the motor controller through digital output port one and digital output port two, and digital output port one and digital output port two respectively transmit command signals of positive limit and negative limit to the motor controller.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. By the combined use of the quadrature encoder and the limit sensor, the present utility model can ensure that the steering wheel is always within a safe operating range, and at the same time avoid mechanical damage caused by excessive rotation.

[0020] To more clearly elaborate the structural features and functions of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and specific embodiments. Description of the Drawings

[0021] Figure 1 is a schematic diagram of a whole vehicle applying the steering wheel motor control system of the present utility model;

[0022] Figure 2 is a side view of the cooperation between the steering wheel and the encoder of the present utility model;

[0023] Figure 3 is a front view of the cooperation between the steering wheel and the encoder of the present utility model;

[0024] Figure 4 is a front view of the cooperation between the steering wheel and the limit sensor and the steering wheel motor of the present utility model;

[0025] Figure 5 is a side view of the cooperation between the steering wheel and the limit sensor and the steering wheel motor of the present utility model;

[0026] Figure 6 is a framework diagram of the system of the present utility model.

[0027] Reference Signs: 1. Steering wheel body; 2. Limit sensor; 3. Steering wheel motor; 4. Motor controller; 5. Steering wheel body; 6. Quadrature encoder; 7. Vehicle control unit; 8. Damper. Detailed Embodiments

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0029] As Figures 1-6 shown, in one embodiment, a steering wheel motor control system includes a steering wheel body 5. An orthogonal encoder 6 is disposed below the steering wheel body 5, and a damper is also disposed below the steering wheel body 5. In this application, since the steering wheel body 5 is not connected to the steering wheel through a mechanical railing, a damper is provided to simulate the actual feeling when the steering wheel body 5 rotates, which is more in line with the user's intuitive use.

[0030] At one end of the whole vehicle, there is a steering wheel body 1. A limit sensor 2 is disposed on the rotating shaft of the steering wheel body 1. On one side of the cross beam where the steering wheel body 1 is installed, a steering wheel motor 3 is also installed. The steering wheel motor 3 is engaged with the gear on the rotating shaft of the steering wheel body 1 through a gear. Therefore, when the steering wheel motor 3 drives the small gear to rotate, the small gear is engaged and transmitted with the large gear through the gear to drive the steering wheel body 1 to rotate, thereby changing the driving direction. The start of the steering wheel motor 3 is controlled by a motor controller 4.

[0031] In addition, the entire system further includes a vehicle control unit 7, and the vehicle control unit 7 is electrically connected to at least the motor controller 4 and the limit sensor 2.

[0032] Specifically, when the steering wheel rotates, since the steering wheel is connected to the orthogonal encoder 6 powered by 24V, the AB-phase pulse signals of the orthogonal encoder 6 are used to detect the rotation direction and rotation angle of the steering wheel in real time. The orthogonal encoder 6 transmits the signals to the motor control. The motor controller 4 can judge the rotation direction and angle of the steering wheel according to the frequency and phase difference of the pulse signals, and drive the steering wheel motor 3 to rotate accordingly to drive the steering wheel body 1 to change the angle. The limit sensor 2 can detect the position of the steering wheel body 5 in real time and input an analog signal of 0 - 5V to the VCU. The VCU judges whether the steering wheel is within the safe range according to this signal:

[0033] When the steering wheel approaches or exceeds the maximum allowable rotation angle, the signal of the limit sensor 2 triggers the positive limit output of the vehicle control unit 7 through the digital output port one. After the controller receives this signal, it immediately stops the motor from rotating forward.

[0034] When the steering wheel approaches or exceeds the minimum allowable rotation angle, the signal of the limit sensor 2 triggers the negative limit output of the vehicle control unit 7 through the digital output port two. After the controller receives this signal, it immediately stops the motor from rotating in the reverse direction.

[0035] Therefore, through the above technical solution, by using the orthogonal encoder and the limit sensor in cooperation, it can be ensured that the steering wheel is always within a safe operating range, while avoiding mechanical damage caused by excessive rotation.

[0036] In the stage of autonomous driving, an instruction or a preset program can be directly sent from the vehicle control unit 7 to the motor controller 4, and the rotation of the steering wheel motor 3 can be controlled through the motor controller 4 to directly control the steering of the steering wheel body 1, without installing an additional steering motor under the steering wheel body 5, which is more convenient and fast, and the installation is convenient.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steering wheel motor control system, characterized in that, It includes a steering wheel body; a limit sensor, which is arranged on the steering wheel body; a steering wheel motor, which is arranged in a cross beam for fixing the steering wheel body, and the steering wheel motor is connected to the steering wheel body through gear meshing; a motor controller, which is used to control the steering wheel motor; a steering wheel body; and: an orthogonal encoder connected to the steering wheel body, and the orthogonal encoder is electrically connected to the limit sensor and the motor controller.

2. The steering wheel motor control system according to claim 1, wherein, It further includes a vehicle control unit, and the vehicle control unit is electrically connected to the motor controller and the encoder.

3. The steering wheel motor control system according to claim 2, wherein The limit sensor is a sensor with 0-5V analog signal input. The limit sensor is used to detect the current position of the steering wheel, and the limit sensor is used to transmit a signal to the vehicle control unit.

4. The steering wheel motor control system according to claim 1, wherein, The steering wheel body is arranged at the center of the cross beam, and the limit sensor is arranged above the rotating shaft of the steering wheel body.

5. The steering wheel motor control system according to claim 1, characterized in that, A large gear is connected to the rotating shaft of the steering wheel body, a small gear is connected to the steering wheel motor, and the large gear and the small gear are in meshing transmission through gears.

6. The steering wheel motor control system according to claim 1, wherein The orthogonal encoder is an encoder powered by 24V. The orthogonal encoder is used to detect the rotation direction and angle of the steering wheel body in real time.

7. The steering wheel motor control system according to claim 2, wherein The vehicle control unit is connected to the motor controller through digital output port one and digital output port two. Digital output port one and digital output port two respectively transmit positive limit and negative limit command signals to the motor controller.

8. The steering wheel motor control system according to claim 1, wherein, A damper is connected to the lower end of the steering wheel body.

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