利用红外线或超声波或激光测距原理,在汽车前面和尾部分别安装一测距装置,汽车在行驶过程中,如果突然有人从车前横穿公路,此装置检测到信息,汽车立刻自动刹车(同时尾部指示灯发亮,提醒后面汽车注意)。同样,倒车时,距障碍物有一定 The use of infrared or ultrasonic or laser ranging principle, the front and rear of the car were installed a distance measuring device, the car in the process of traveling, if someone suddenly crossed the road from the front of the car, the device detects the message, the car immediately automatic braking Tail lights, remind the car behind the attention). Similarly, when reversing, there is a certain distance from the obstacle