| 摘要 |
<p>PURPOSE:To always correctly detect an obstruction independent of the magnitude of the curvature of the road by setting up at least two antennae for receiving reflected waves from an obstruction at a prescribed interval in the front of a moving body. CONSTITUTION:An output composed by a composition part 17 is transmitted to an obstruction detecting circuit 20 and the obstruction is detected. The distance from an automobile 30 to an obstruction A is computed from the time difference between the two parts: one is when the detection information that there is an obstruction is received from the detecting circuit 20, and the other is when the transmission signal is transmitted from a transmission circuit, and the hazard is judged based on the speed, the direction of wheels 32, etc., of the automobile 30. An alarm display and a command output of a break action are output from an output terminal 22 when the obstruction A is judged to be a hazard for the travel of the automobile 30 by the signal process control part 21, the brake of the automobile 30 is automatically operated and the hazard of the obstruction A is avoided.</p> |
