将采集的时域加速度信号积分处理，一次积分为速度信号，二次积分为位移信号，并绘制信号图(The acquired time domain acceleration signal is integrated into a velocity signal, the two integral is a displacement signal, and a signal map is drawn)

使用MATLAB实现加速度的二次积分，方便好用(use MATLAB to realize the acceleration of the second integral, convenient and easy to use)