1. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Nanjing Metrology Research Center, PipeChina West East Gas Pipeline Company, Nanjing, Jiangsu 210046, China
Abstract：Aiming at the lack of a method for calibrating the sensitivity of hydrophones under variable temperature conditions, a temperature-variable hydrophone sensitivity calibration system based on the sound tube of the moving coil transducer was designed. A model was established to analyze the sound pressure distribution in the sound tube, and the compensation amount for the sensitivity calibration result after changing temperature was calculated; Comsol was used to simulate the influence of different sound tube thicknesses on the sound field, and the non-uniform vibration of the bottom surface and the effect of different sizes of hydrophones on the calibration were analyzed. Influence of the results, the appropriate acoustic tube size and measurement method were determined. The hydrophones of different sizes were calibrated under normal and variable temperature conditions and the calibration results were compared with the standard values. The results show that the deviation of the calibration result of this system from the standard value is less than 0.5dB at normal temperature, and the deviation of the measurement result from the standard value under the condition of variable temperature is less than 0.6dB, and the expanded uncertainty of the whole system is about 1.0dB.
Chen Y, Jia G H, Fei T, et al. The Pilot Comparison Calibration of Vector Receivers in the Frequency Range 5 Hz to 10kHz ［J］. Acta Metrologica Sinica, 2020, 41 (10): 1279-1283.
Chen Y, Ping Z H, Isaev A E, et al． Supplementary Comparison of Free-field Hydrophone Calibrations in the Frequency Range 250 Hz to 8kHz ［J］. Acta Metrologica Sinica, 2016, 37 (1): 84-89.
Chen N, Zhao P. Wang Y B, et al. The Temperature Rise of Tissue-Mimicking Phantom under the Action of High Intensity Focused Ultrasound［J］. Acta Metrologica Sinica, 2021, 42 (12): 1636-1643.
He S P, Tang W L, Liu T, et al. The influence of the wall thickness and elasticity of the underwater acoustic tube on the internal sound field ［J］. Journal of Ship Mechanics, 2003, 7 (5): 97-103.
Rubinow S I. Wave Propagation in a Fluid-Filled Tube ［J］. Journal of the Acoustical Society of America, 2005, 50 (1B): 198-223.
［18］
JJF 1059.1—2012 测量不确定度评定与表示 ［S］. 2012.
Yuan W J, Chen Y, Zhang X L, et al. The Research of Underwater Acoustics Pressure Standard in the Frequency Band of 0.01 to 1 Hz ［J］. Acta Metrologica Sinica, 2004, 25 (3): 270-274.
［10］
柯导明, 陈军宁. 数学物理方法 ［M］. 北京: 机械工业出版社, 2008.
Yu L J, Wang Y B, Tang J X, et al. Study on the Measurement Method of Transducer Sensitivity in Non-rigid Tube［J］. Acta Metrologica Sinica, 2022, 43 (9): 1192-1199.
Li S, Shen J X, Tang H Q, et al. Measurement for Low-frequency Properties of Underwater Acoustic Materials in a Standing Wave Tube ［J］. Acta Metrologica Sinica, 2003, 24 (3): 221-224.
Tong H Y, Yi Y, Li S, et al. Low-frequency Calibration of Sensitivity of Large-planar Hydrophones in Dynamic Environment of Pressure and Temperature ［J］. Acta Metrologica Sinica, 2021, 42 (9): 1187-1192.
［15］
芦雪松. 弹性充液管道声传输特性研究 ［D］. 哈尔滨:哈尔滨工程大学, 2015.
Wei F J, Wen Z M, Wang Y J, et al. Research on Water Density and Temperature Function Based on Regression Analysis ［J］. Journal of Yancheng Institute of Technology (Natural Science Edition), 2021, 34 (3): 75-78.
2023, Vol. 44 
