BACK OBSTACLE DISPLAY FOR VEHICLE

摘要

PURPOSE:To enable positional indication of an obstacle in the entire detection area behind vehicles without complicating the construction by scanning the obstacle detection area with one ultrasonic transmitter/receiver. CONSTITUTION:One ultrasonic transmitter/receiver 1 provided on a bumper of a vehicle is controlled through a scan mechanism 3 to scan the entire obstacle area behind the vehicle. The scanning angle position of a transmitter/receiver 1 is detected through a potentiometer 2, an angle sensor interface circuit 5 responding to the mechanism 3 to control a display signal processing circuit 6 to which an obstacle detection output is applied from a sonar circuit 4. Therefore, a display unit 7 in the vehicle can indicates the position of an obstacle in the entire detection area behind the vehicle with a simple construction dispensing with a number of fixed ultrasonic wave transmitter/receiver.