It is a general method to apply the correlation technique to dealing with the signal data acquired in the ultrasonic measurement system. 在超声波测量系统中，利用相关技术来处理采集所得数据信号是一种非常普遍的方法。
It is also shown that digital speckle correlation method has higher accuracy, and richens the research method of overlying strata movement. 数据分析还表明，数字散斑相关方法具有较高的精度，这一新的研究方法引入，丰富了上覆岩层活动规律的研究手段。
