Acta Metrologica Sinica  2024, Vol. 45 Issue (11): 1709-1717    DOI: 10.3969/j.issn.1000-1158.2024.11.16
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Hydrostatic Excitation Hydrophone Calibration Based on Motion Trajectory Constraints
WANG Yixin1,WANG Ke2,WANG Min2,XING Guangzhen2,YANG Ping2,ZHENG Huifeng1
1. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Division of Mechanics and Acoustics, National Institute of Metrology, Beijing 100029, China
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Abstract  In the traditional hydrostatic excitation method for hydrophone calibration system, the influence of inertial force on equivalent sound pressure is inconsistent due to the lack of constraint of the connecting hose during water vibration in the connecting hose, resulting in a large uncertainty introduced by measurement repeatability,which affects the uncertainty of hydrophone sensitivity calibration. A hydrostatic excitation method for hydrophone calibration based on motion trajectory constraint is proposed to solve this problem. This method designs a motion constraint device to control the same motion trajectory of the communicating hose during vibration, establishes a mathematical model based on this, determines the impact of the vibration of the communicating hose on the equivalent sound pressure, and derives an equivalent height calculation formula that is not limited by the open-circuit voltage measurement data of the hydrophone. A hydrostatic excitation method hydrophone calibration device based on motion trajectory constraints is built and compared with traditional methods. Experimental results indicate that, compared to the traditional hydrostatic pressure stimulation method, the proposed method reduced the uncertainty in hydrophone sensitivity calibration from 0.34 dB(k=2) to 0.25 dB(k=2), with the uncertainty introduced by measurement repeatability decreasing from 0.12dB to 0.02dB.
Key wordshydroacoustic metrology      hydrophone calibration      motion trajectory constraints      static water pressure excitation method      very low frequency;sensitivity      equivalent height     
Received: 19 December 2023      Published: 29 November 2024
PACS:  TB95  
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WANG Yixin
WANG Ke
WANG Min
XING Guangzhen
YANG Ping
ZHENG Huifeng
Cite this article:   
WANG Yixin,WANG Ke,WANG Min, et al. Hydrostatic Excitation Hydrophone Calibration Based on Motion Trajectory Constraints[J]. Acta Metrologica Sinica, 2024, 45(11): 1709-1717.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.11.16     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I11/1709
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