| 摘要 |
The present invention relates to a reverse radar with vehicle approaching alarm comprising a main body and sensors, in which the main body comprises a CPU circuit, an operational amplifier circuit, a switching circuit, a signal transmitting-receiving circuit, a detecting circuit and a power source, and the input terminals of the CPU circuit are connected to the output terminals of the operational amplifier circuit, the detecting circuit and the power source, and the output terminal of the CPU circuit is connected to the input terminal of the switching circuit, and the input terminal of the operational amplifier circuit is connected to the output terminal of the switching circuit, and the switching circuit and the signal transmitting-receiving circuit are interconnected, and the output terminals of the power source are connected to the input terminals of the switching circuit and the signal transmitting-receiving circuit, and the main body further comprises an alarming source which gives a warning signal when another vehicle approaches and a controlling circuit which controls the alarming source, and the controlling circuit is connected to the output terminal of the CPU circuit and the power source. The structure of the present invention is simple. When the vehicle is parked in a car park and the driver is not present, the present invention can give a warning signal to alert the approaching vehicle so as to prevent accident. |
