A study on temperature dependent acoustic receiving characteristics of underwater acoustic sensors

Yub Je; Yohan Cho; Kyungseop Kim; Yong-Woon Kim; Saeyong Park; Jeong-Min Lee

doi:10.7776/ASK.2019.38.2.214

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2019 Vol.38, Issue 2 Preview Page Next Page

Research Article

A study on temperature dependent acoustic receiving characteristics of underwater acoustic sensors 수중음향센서 수온 변화에 따른 음향 수신 특성 변화 연구

31 March 2019. pp. 214-221

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Abstract

In this paper, a temperature dependent acoustic receiving characteristics of underwater acoustic sensor is studied by theoretical and experimental investigations. Two different types (lowmid frequency sensor and high frequency sensor) of underwater acoustic sensors are designed with different configuration of baffle and conditioning plate. The temperature dependent characteristics of the acoustic sensors are investigated within the temperature range from –2 °C to 35 °C. The material properties of the piezoelectric ceramics, molding and baffle, which are the primary materials of the acoustic sensors, are measured with temperature change. The temperature dependent RVS (Receiving Voltage Sensitivity) characteristics of the acoustic sensors are simulated by using the measured material properties. The RVS changes of the acoustic sensors are measured by changing temperature in the watertank where the acoustic sensors are installed. The measured and the simulated data show that the temperature dependent characteristics of the acoustic sensors are mainly dependent for the sound speed changes of the molding material.

Keywords

Piezoelectric transducers

Temperature dependent characteristics

Passive sonar

Sound speed of acoustic materials>Sound speed of acoustic materials

본 논문은 수중음향센서의 수온 변화에 따른 음향 수신 특성 변화를 이론적, 실험적 방법으로 확인하였다. 반사판 및 배플 구성에 따라 중․저주파용 및 고주파용의 두 가지 음향센서를 설계하여 –2 °C ~ 35 °C의 온도범위에서 온도 변화에 따른 음향 수신 특성을 각각 분석하였다. 음향센서 주요 구성 소재의 온도별 물성치 변화에 대한 영향성을 분석하기 위하여 압전세라믹, 몰딩 및 배플 시편의 온도별 물성치 변화를 측정하였고, 측정된 물성치를 활용하여 온도별 수신감도(Receiving Voltage Sensitivity, RVS) 변화를 유한요소해석 기법을 통하여 해석하였다. 제작된 두 가지 음향센서의 온도별 수신감도 특성을 측정하기 위하여, 내부 수온 및 수압 조정이 가능한 압력 챔버에 음향센서를 설치하고 챔버 내부 수온을 변화시켜가며 수신감도를 측정하였다. 측정 및 분석결과 수중센서의 온도별 수신감도 특성은 몰딩 재료의 음속변화에 주도적으로 영향을 받는 것을 확인하였다.

키워드

압전 트랜스듀서

온도별 수신감도

수동소나

음향 재질 음속

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 38
No :2
Pages :214-221
Received Date : 2018-11-08
Revised Date : 2019-01-07
Accepted Date : 2019-03-26
DOI :https://doi.org/10.7776/ASK.2019.38.2.214

The Journal of the Acoustical Society of Korea ISSN:1225-4428(Print) 2287-3775(Online) 한국음향학회지

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