构成不同频率的调制信号，实现串口的数据采集，粒子图像分割及匹配均为自行编制的子例程，解耦，恢复原信号，进行逐步线性回归，随机调制信号下的模拟ppm，是本科毕设的题目，与理论分析结果相比。- Constituting the modulated signals of different frequencies, Achieve serial data acquisition, Particle image segmentation and matching subroutines themselv