空气静压下的水听器灵敏度校准系统  

Hydrophone Sensitivity Calibration System under Aerostatic Pressure

作　　者：李斌 王月兵[1] 赵鹏[1] 解建宇 蔡越 LI Bin;WANG Yuebing;ZHAO Peng;XIE Jianyu;CAI Yue(Key Laboratory of In-situ Measurement of Ministry of Education,China Jiliang University,Hangzhou,Zhejiang 310018,China)

机构地区：[1]中国计量大学原位计量教育部重点实验室,浙江杭州310018

出　　处：《计量学报》2025年第2期233-239,共7页Acta Metrologica Sinica

基　　金：国家质量基础设施体系(NQI)重点专项(2022YFF0607500)。

摘　　要：针对水听器在空气中的灵敏度校准,阐述了空气静压下水听器灵敏度的校准原理,设计并搭建了一套便捷的校准系统。计算分析校准腔体中空气静压力的变化关系,控制装置内的声压变化,对频率约为6 Hz的水听器灵敏度进行校准。通过仿真和理论计算,分析了系统设计的合理性。实验结果表明:该校准系统测量的水听器灵敏度与甚低频静水压激励法测量的灵敏度最大偏差不超过0.5 dB。与振动液柱法、驻波管比较法测量灵敏度相比较,偏差分别在0.6 dB和1 dB以内,系统的扩展不确定度U≈0.8 dB(k=2),从而验证了该系统在空气静压下校准水听器低频灵敏度方法的可行性。Aiming at the sensitivity calibration of hydrophones in air,the calibration principle of hydrophone sensitivity under aerostatic pressure is described,and a convenient calibration system is designed and built.Calculate and analyze the variation relationship of air static pressure in the calibration cavity,and control the change of sound pressure in the device to calibrate the sensitivity of hydrophone at a frequency of about 6 Hz.The rationality of the system design is analyzed through simulation and theoretical calculation.The experimental results show that the maximum deviation of the hydrophone sensitivity measured by the calibration system from that measured by the very low-frequency hydrostatic excitation method is not more than 0.5 dB,and the deviation is within 0.6 dB and 1 dB respectively compared with that measured by the vibrating liquid-column method and the standing-wave-tube comparison method with an extended uncertainty of the system of U»0.8 dB(k=2),which verifies the feasibility of this method for calibrating the low-frequency sensitivity of the hydrophone under the aerostatic pressure.The feasibility of the method is verified.

关 键 词：声学计量 水听器 低频灵敏度 空气静压 校准系统 

分 类 号：TB95[一般工业技术—计量学]