| 熊翰林,张希,周炜,沈国栋,段炼,赵勰.基于矢量运算的换能器指向性图修正方法[J].声学技术,2023,42(3):391~396 |
| 基于矢量运算的换能器指向性图修正方法 |
| A modification method of transducer directivity map based on vector operation |
| 投稿时间：2021-11-19 修订日期：2022-02-11 |
| DOI：10.16300/j.cnki.1000-3630.2023.03.019 |
| 中文关键词: 水声换能器 指向性测试 矢量运算 |
| 英文关键词: underwater acoustic transducer directivity test vector operations |
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| 中文摘要: |
| 换能器的指向性测试是其声学性能测试的基本项之一。文章对换能器的指向性测试时，声中心与机械装置的旋转中心存在偏差的情况进行分析，并采用极坐标下矢量运算的方法进行理论分析和仿真，得出该偏差会直接对测试结果引入幅度与角度偏差，使全指向性换能器指向性图形成类似心形的指向性图，并得到了一种换能器指向性图修正方法。实测结果表明：当声中心与机械装置的旋转中心存在偏差时，换能器指向性响应测试及指向性开角的判读会存在偏差，同时文中提出的指向性图修正方法对此工况下的测试结果有较好的修正效果，有助于提高水声换能器指向性测量的精度，且具有良好的工程适用性。 |
| 英文摘要: |
| The directivity test of the transducer is one of the basic acoustic performance test items. In this paper, the deviation between the sound center and the rotation center of the mechanical device is calculated in transducer directivity test, which shows that the deviation will directly introduce the amplitude and angle deviations of the test result to change the directivity pattern of a full-directional transducer into a pattern similar to heart-shape; and then a correction method for directivity pattern is proposed. The actual test results show that the correction method proposed in this paper is effective when the deviation between the mechanical rotation center and the sound center exists; and as the rotation radius of the mechanical device increases, the correction effect is gradually getting better. This method helps to improve the accuracy of the directivity measurement of underwater acoustic transducer, and has good engineering applicability. |
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