| 何琪,宫在晓,李整林,李风华,郭良浩.基于时延冗余测量的阵形校准[J].声学技术,2022,41(3):301~305 |
| 基于时延冗余测量的阵形校准 |
| Time delay redundancy measurement for array shape calibration |
| 投稿时间：2022-02-08 修订日期：2022-04-26 |
| DOI：10.16300/j.cnki.1000-3630.2022.03.001 |
| 中文关键词: 阵形校准 时延估计 |
| 英文关键词: array shape calibration time delay estimation |
| 基金项目:国家自然科学基金(11874061、12174418)资助项目 |
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| 中文摘要: |
| 海底柔性水平阵的阵形校准，可以利用两个校准声源测量阵元间的声传播时延差来求解得到。传统算法只利用了相邻阵元信号测量的时延差，但误差会随噪声增大而出现累积。在信噪比降低时，所提方法通过冗余时延测量有效地减少了误差累积，从而提高了阵形校准的精度与稳定性。数值仿真与实验结果都验证了该方法的有效性。 |
| 英文摘要: |
| The array shape calibration of a flexible horizontal array deployed on the sea-bottom can be solved by measuring the sound propagation delay difference between the array elements with two auxiliary sources. The traditional algorithms only measure the time delay difference between adjacent array elements, and the error will accumulate with the increase of noise. However, the proposed method in this paper can effectively reduce the accumulation of errors through redundant time delay measurement when the signal to noise ratio decreases, therefore the accuracy and stability of array-shape calibration can be improved. Numerical simulation and experiment results both verify the effectiveness of the method. |
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