Design of Ultrasonic Radar Detection System

To solve the problems of limited range and low measurement accuracy of traditional reversing radar, a high-precision radar detection system based on dual micro-control units is designed. In this system, two STC89C52 single-chip microcomputers are used to control eight-channel ultrasonic sensors to carry out ranging to avoid blind area. Meanwhile, a temperature sensor is used to detect the environment temperature in real time, and temperature compensation ultrasonic wave velocity is applied to improve the measurement accuracy. In addition, 5 buttons are applied to set alarm threshold of buzzer which can contorl buzzer's frequency varies with different frequencies by different distances. Moreover, the design used LCD1602 and light-emitting diode for display and further warning. The test results show that the linear ranging distance of the system is 0.01 ~ 7 m, and the ranging accuracy can reach 0.01 m.