互相关函数法在海底微地形测量中的应用研究

Study on the utrasonic distance measurement system for seabed microtopography

根据主动式水下测距原理,采用超声波换能器向模拟海底微地形发射超声波。由于超声回波信号与参考信号具有强互相关的特性,求出两者的互相关系数以及最大互相关系数对应的采样点位置,从而获得超声波传播时间。通过试验研究表明,采用互相关方法应用于海底微地形测量具有较高的测量精度,能够满足水下微地形高程测量的需要。

According to active underwater measuring location principle, the ultrasonic transducer is launched ultrasonic for simulating submarine terrain. Because the ultrasonic echo signal and reference signal have strongly inter-related characteristics, maximum relations to the sampling location would be gained. Utrasonie propagation time is obtained. Experimental results show that cross-correlation method for measuring seabed topography has highly accuracy. It will be able to meet the underwater Micro-topography measurement requirement.