摘要
随着换能器谐振频率的降低,其尺寸一般会增大,现有的测量方法对其指向性的测量越来越困难,而且换能器在实船安装前后性能会发生变化。文章提出了一种基于三维立体水听器阵列的开阔水域下换能器指向性实船校准方法。利用超短基线定位和坐标转换确定待校准换能器与水听器阵列的位置与方向,并通过水听器阵的接收声压数据绘制换能器的指向性图。在湖上试验时分别使用标准测量法和实船校准法测量换能器的指向性,并对5 kHz和2.5 kHz频率下的实验数据进行对比分析,测试结果表明:-3 dB波束宽度误差分别为4.2%和7.4%,均满足水声测量误差低于10%的要求,证明了实船校准法的可行性和有效性。
The existing measurement methods are difficult for measuring the directivity of the transducer with decrease of its resonance frequency and increase of its size, moreover, the transducer performance changes before and after installation. In view of this problem, a ship-board calibration method of transducer directivity in open water based on 3 D hydrophone array is proposed in this paper. The positions and orientations of the transducer to be calibrated and the hydrophones array are determined by using ultra-short baseline(USBL) positioning and coordinate conversion, and the directivity diagram of the transducer is drawn by extracting the received sound pressure data of hydrophone array. Both standard measurement method and ship-board calibration method are used to measure the directivity of the transducer respectively in lake trial, and the experimental data at 5 kHz and 2.5 kHz are compared and analyzed. The result shows that the-3 dB beam-width errors in the directivity diagrams at the two frequencies measured by the two methods are4.2% and 7.4% respectively, which meet the requirement of underwater acoustic measurement(i.e. less than 10%), so the feasibility and effectiveness of the ship-board calibration method are confirmed.
作者
盛勇杰
王月兵
佟昊阳
赵涵
刘海楠
沈超
SHENG Yongjie;WANG Yuebing;TONG Haoyang;ZHAO Han;LIU Hainan;SHEN Chao(College of Metrology and Measurement Engineering,China Jiliang University,Hangzhou 310018,Zhejiang,China;Hangzhou Applied Acoustics Research Institute,Hangzhou 311499,Zhejiang,China)
出处
《声学技术》
CSCD
北大核心
2021年第4期581-586,共6页
Technical Acoustics
基金
国防军工计量“十三五”科研计划项目(JSJL2018207B007)。
关键词
换能器
指向性
超短基线定位
坐标转换
实船校准
transducer
directivity
ultra-short baseline(USBL)positioning
coordinate conversion
ship-board calibration
