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-SR

matlab实现数据插值与拟合的程序，数学专业及做数模程序可以看下。-Matlab to realize the data interpolation and fitting, mathematics analog program can see and do.

能够对hmc5883三轴磁力数据进行非线性拟合，输出拟合后的数据，完成磁力计的校准(The hmc5883 three axis magnetic data can be nonlinear fitted, and the output data can be adjusted to accomplish the calibration of magnetometer)