| 摘要 |
PURPOSE:To certainly prevent the collision with the obstacle located toward the rear of an automobile, by optically detecting the position of the obstacle. CONSTITUTION:A plurality of light emitting elements LED1-LED5 are arranged in close vicinity to each other while a plurality of light receiving elements PD1- PD6 are arranged at a position spaced apart from the LED group in close vicinity to each other and beam like lights for radially dividing a predetermined detection region Y are generated from the LED group in time sharing and simultaneously received by the PD group while radially dividing the detection region in the direction crossing the irradiating direction by the LED group. In this case, the position of an obstacle emitting reflected light is detected from the combination of PD which detected the reflected light from the obstacle in the detection region, for example, in X24 and LED which emitted light at this point of time by an object position measuring logical circuit 12. |
