一种基于时延的水下声基阵坐标估算方法

Underwater Acoustic Array Coordinate Estimation Based on Time Delay

阵形估算是水听器阵列应用中的关键问题,基于时延的水下声基阵大地坐标标定方法利用声源发射和声阵接收的CW脉冲之间的时延获得空间中的三个声源发射点到阵元的距离,并以这三个声源发射点为圆心,以声源发射点到阵元的距离为半径做球面,得到的交点即为阵元的大地坐标。通过实验数据分析结果可以得出如下结论:基于时延的球面交汇法得到的阵形标定结果的绝对误差均值为0.13 m,可以把该方法运用于实际的工程测量当中。

Array shape estimation is a key matter of the application of hydrophone arrays, the method of the underwater acoustic array coordinate estimation is based on time delay, it makes use of the time delay between the CW pulse sent by acoustic source and the CW pulse received by acoustic array to measure the distance between the measuring point and array member. Using the measuring point as center and the distance between the measuring point and array member as the radius, the method can get the intersection of spherical surface, which is the coordination of array member. The result of data analysis shows that： the mean absolute error of array shape estimation gained by the method of spherical surface intersection is 0.13m, so the method can be used in practical project measurement.