激光法水听器灵敏度计量校准系统研究  

Research on sensitivity measurement and calibration system of laser hydrophone

作　　者：张凯 王月兵 赵鹏 解建宇 ZHANG Kai;WANG Yuebing;ZHAO Peng;XIE Jianyu(College of Metrology&Measutement Engineering,China Jiliang University,Hangzhou 310018,Zhejiang,China)

机构地区：[1]中国计量大学计量测试工程学院,浙江杭州310018

出　　处：《声学技术》2024年第4期593-600,共8页Technical Acoustics

基　　金：国防军工计量“十三五”科研计划项目(JSJL2018207B007)。

摘　　要：为满足水听器灵敏度校准的需要,开展了对激光法水听器灵敏度校准系统的研究。根据激光法水听器灵敏度测量的基本原理,综合分析国内外相关研究,最终采用反光透声条带的激光法水听器灵敏度校准方法进行测量系统设计,以消除传统薄膜法存在的夹持方式与夹具对声场造成的影响;为解决反光透声条带在测量频段的谐振造成相应频点测量误差过大的问题,对反光透声条带的振动模态进行了仿真,并对仿真模型进行了实验验证。仿真结果与条带频率响应测量结果基本一致,实现了条带谐振频点的准确预测,证明该模型对于条带选型具有指导作用。文章研制了激光法水听器灵敏度计量校准系统,并开展了校准实验。文中的实验结果与三换能器互易法的校准结果之间的误差不超过1 dB,证明该测试系统具备水听器灵敏度校准的能力,具有较高的军事和民用价值。To meet the needs of hydrophone sensitivity calibration,the hydrophone sensitivity calibration system using laser method is studied.According to the basic principle of the laser method based hydrophone sensitivity measurements and the comprehensive analysis of relevant research works at home and abroad,the laser method using the reflective and transparent strip is finally adopted to design the measurement system for eliminating the influence of clamping way and clamps on the sound field in the traditional thin-film method.In order to study the problem that the resonance of the reflective and transparent strip in the measurement frequency band causes the big measurement error at the corresponding frequencies,the vibration mode of the reflective and transparent strip is simulated,and the simulation model is verified by experiments.The simulation results are basically consistent with the measurement results of frequency responses of the strip,and the accurate prediction of the resonance frequencies of strip is realized.Thus,it is confirmed that the model has a guiding role for strip selection.The hydrophone sensitivity measurement and calibration system using laser method is developed,and calibration experiments are carried out.The error between the experimental results and the calibration results of the three-transducer reciprocity method is less than 1 dB,which proves that the test system has the capability of hydrophone sensitivity calibration and has high military and civilian values.

关 键 词：水听器 灵敏度 校准 激光测振技术 

分 类 号：TB56[交通运输工程—水声工程]