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该装置由超声波发射、接收探头,控制电路和声光显示部分组成。超声波发射,接收探头安装在车辆的后部并通过导线与控制电路部分相连,控制电路的输出经导线与声光显
The device consists of ultrasonic transmitter and receiver probe, control circuit and sound and light display part. Ultrasound transmission, receiving probe installed in the rear of the vehicle and through the wire connected to the control circuit part of the control circuit output by the wire and sound and light were