采用超声波传感器HC-SR04为测距元件、LCD1602液晶屏为显示器件、蜂鸣器和红光LED为报警器。超声波传感器HC-SR04将采集的数据通过信号线传送给单片机，利用MATLAB进行数据拟合，提高了测量精度，然后通过LCD1602液晶屏实时显示。-HC-SR04 ultrasonic sensor distance measuring element is , LCD1602 LCD screen display, buzzer and red LED for the alarm. HC-SR04 ultrasonic sensor data collected will be transmitted via the signal line to the microcontroller using MATLAB data fitting , improve the measurement accuracy , and real-time display through LCD1602 LCD screen.