Rear View Monitor System

REAR VIEW MONITOR SYSTEM

System Diagram






System Description

CAMERA IMAGE OPERATION PRINCIPLE
- Power is supplied to rear view camera from camera control unit and the rear view camera outputs the camera image to camera control unit when selector lever is set to reverse position and the reverse signal on camera control unit is input.
- Camera control unit superimposes the guiding line and predicted course line to the image from rear view camera and outputs to display unit. In this case, the reverse signal is also input to AV control unit. Therefore, AV control unit recognizes the selector lever as in the reverse position. And then AV control unit switches the image displayed by the communication signal between AV control unit and display unit with the camera image.
- AV control unit outputs camera image signal that is inputted from camera control unit to display unit.
- Camera control unit controls the direction and distance of predicted course line according to the sensor signal from steering angle sensor.
- AV control unit determines whether rear view camera is equipped or not, based on the presence of camera connection recognition signal. It switches to rear view monitor image at the time of reverse signal input when rear view camera is equipped.
- Warning message under the rear view monitor display is described by AV control unit.






PREDICTED COURSE LINE OPERATION PRINCIPLE

Detection of steering rotation direction
Camera control unit detects the rotation direction of steering according to the phase difference of two pairs of pulse signals (sensor signal 1 and sensor signal 2) input from steering angle sensor.

Detection of steering neutral position
The sensor signal 3 input from steering angle sensor is generated at 1 pulse per 1 rotation of the steering wheel. Camera control unit detects the steering neutral position from this pulse.






Correction of steering neutral position
Camera control unit corrects the steering neutral position during driving according to the vehicle speed signal and sensor signal.

Component Description