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本系统包括汽车倒车时用来探测其后面障碍物的超声探测电路和超声通讯电路,两者可以自动转接。超声探测电路仅在超声通讯电路不用时才可使用,而且只有汽车处在一种或多种特定工作状态下才会启用。本系统在汽车前后部各有一个超声换能器,尾部换能器由探测电路和通讯电路共用,所以它既能探测车后的障碍物,又能同后面的汽车通讯;头部换能器仅用于通讯电路,所以它也能同前面的汽车通讯。前后换能器直接与通讯电路中的呼叫信号应答电路连接,使得呼叫信号应答电路能够应答前后方汽车的呼叫信号。
The system includes an ultrasonic detection circuit and an ultrasonic communication circuit used to detect the obstacle behind the car when the car is reversing, both of which can be automatically transferred. Ultrasound detection circuit only in the ultrasonic communication circuit can only be used, and only the car in one or more specific operating conditions will be enabled. The system in the car front and rear have an ultrasonic transducer, the rear transducer by the detection circuit and communication circuit share, so it can detect obstacles behind the car, but also with the car behind the communication; head transducer Only for communication circuits, so it can also communicate with the car in front. The front and rear transducers are directly connected to the call signal answering circuit in the communication circuit so that the call signal answering circuit can answer the call signals of the front and rear car.