| 摘要 |
PURPOSE:To prevent collision with a car behind or the like due to careless opening of a door by providing ultrasonic transceivers on the rear part of an automobile so as to measure the danger degree and the dislocation width from the car behind or the like, and for example locking the door on the dangerous side in the dangerous case. CONSTITUTION:Ultrasonic transceivers 3, 4 to detect the distance from the car behind 2 are arranged respectively on the right and left of the rear part of an automobile 1. The respective detected signals of the transceivers 3, 4 are respectively input to a computer 5. The respective control signals of the computer 5 are output to various alarming devices 6, a door lock device 7, a seat belt winding device 8, an automobile take-off device 9, and the like. Respectively at this time by means of the computer 5, the distance between this car and the car behind is detected based on the respective detected signals from the transceivers 3, 4, a danger quantity related to the relative speed between the automobiles is measured based on the distance between the automobiles, and the dislocation width between the automobiles is computed. In case of danger, for example the door on the dangerous side is locked so as to prevent collision with the car behind 2 due to careless opening of the door. |
