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1-3형 압전 복합체를 이용한 광대역 수중 통신용 음향 트랜스듀서에 관한 연구
이경우(KYUNG-WOO LEE),소형종(HYOUNG-JONG SO),임실묵(SIL-MOOK LIM),김원호(WON-HO KIM),조운현(UN-HYUN CHO) 한국해양공학회 2008 韓國海洋工學會誌 Vol.22 No.2
Recently, many researches in relation to data transmission with faster speed and greater volume, many researches have been carried out on sonnr systems for underwater communimtion. According to these researches, an acoustic transducer for underwater communication requires wide bandwidth properties. In domestic researches for underwater communimtion sonar, an operating frequency in the range of 20-40 ㎑ is used. In this paper, we propose anon-resonance type acoustic transducer for underwater communimtion. The TVR (transmitting voltage response) characteristics increased linearly as the frequency increased, and the RVS (receiving voltage sensitivity) characteristics were constant as the frequency increased. Traditional techniques for wide bandwidth transducershave a limit and a transmission loss difference at lower and higher frequency operating ranges. In this paper, the new transducer proposed decreased the transmission loss under some conditions. It was optimized with the FE analysis tool (ATILA) and evaluated using the TVR and the RVS characteristics in the range of 10-90 ㎑. The value of TVR was 138 ㏈ at 20 ㎑ and 148 ㏈ at 40 ㎑, and the differences was 12 ㏈. The value of RVS was 195±2 ㏈ and nearly constant. From theseresults, it is certain that the developed transducers mn be used for an underwater communimtion network in the 1.3 ㎞ range with both a 20 ㎑ bandwidth and 30 ㎑ center frequency.
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