文章摘要
郭世旭,朱锰琪,王萧博,王月兵,赵鹏,杨民.基于四元十字阵的低频换能器指向性检测方法[J].声学技术,2019,38(4):464~469
基于四元十字阵的低频换能器指向性检测方法
A method of directivity measurement based on four-element cross array
投稿时间:2018-08-15  修订日期:2018-10-19
DOI:10.16300/j.cnki.1000-3630.2019.04.018
中文关键词: 低频换能器  指向性  四元十字阵  双曲面交汇法  时延差
英文关键词: low frequency transducer  directivity  four-element cross array  hyperboloid convergence method  time delay
基金项目:国家重点研发计划(2017YFF0206403)
作者单位E-mail
郭世旭 中国计量大学, 浙江杭州 318000  
朱锰琪 中国计量大学, 浙江杭州 318000 934302321@qq.com 
王萧博 浙江省计量科学研究院, 浙江杭州 310018  
王月兵 中国计量大学, 浙江杭州 318000  
赵鹏 中国计量大学, 浙江杭州 318000  
杨民 哈尔滨工程大学, 黑龙江哈尔滨 15000  
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中文摘要:
      针对大型低频换能器指向性难以测量的问题,提出了一种基于四元十字阵的测量方法以获取大型低频换能器的指向性。利用到达四元十字阵阵元的时延差信息,结合双曲面交汇法对换能器进行定位,并根据四元十字阵阵元测得的声信号实现大型低频换能器指向性的测量;对定位算法进行理论仿真,设计并进行了湖上试验以测量模拟声源的指向性;对湖上试验测量数据进行计算分析,并与模拟声源在消声水池中的测量结果进行比较,两者-3 dB波束开角的测量结果相差在10%以内。此方法可以用于低频换能器指向性的测量。
英文摘要:
      Aiming at the problem that the directivity of large low frequency transducer is difficult to measure, a measurement method based on four-element cross array is proposed in this paper. By measuring the time delay differences between the four-elements of the cross array and combining with the hyperboloid intersection method to locate the transducer, the measurement of the directivity of large low frequency transducer can be realized by measuring the acoustic signals received by the four-elements of the cross array. The transducer locating algorithm is simulated according to the measurement method, and the corresponding lake experiment is designed for measuring the directivity of the simulated sound source based on this method. The measurement results are analyzed and compared with the results of the laboratory measurement method in anechoic tank. It is shown that the difference between both measurement results of -3dB beam width is within 10%, and so this method can be used for testing the directivity of large low frequency transducer in modern sonar equipment.
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