An on-line calibration hydrophone with electrostatic actuator

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• 作者：Jingbin Wang ; Zhaoli Yan ; Bin Chen ; Xiaobin Cheng
• 刊名：SCIENCE CHINA Information Sciences
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：59
• 期：6
• 全文大小：470 KB
• 刊物类别：Computer Science
• 刊物主题：Chinese Library of Science
  Information Systems and Communication Service
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1919
• 卷排序：59

文摘

On-line sensitivity calibration of hydrophones is of considerable significance for their practical application. An on-line method using an electrostatic actuator is proposed in this paper for a radially polarized cylindrical piezoelectric hydrophone. The theory of this calibration method is analyzed. A calibration structure with an electrostatic actuator is designed, and is integrated with the hydrophone sensing element. The sensitivity and frequency characteristics of the electrostatic actuator are measured experimentally. The sensitivity of the hydrophone is calibrated and compared with its free-field sensitivity. Uncertainty analysis shows that the expanded uncertainty of the proposed calibration method is about 1.1 dB at a confidence probability of 95%, which meets the uncertainty requirements for hydrophone sensitivity calibration.Keywordsunderwater measurementhydrophoneon-line sensitivity calibrationelectrostatic actuatoruncertainty