Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Design and Development of a Broadband Ultrasonic Transducer Operating over the Frequency Range of 40 to 75 kHz

40-75 kHz의 주파수 범위에서 동작하는 광대역 초음파 변환기의 설계 및 개발

  • Lee, Dae-Jae (Division of Marine Production System Management, Pukyong National University) ;
  • Kwak, Min Son (Shin-A Corporation) ;
  • Kang, Hee-Young (Hydrographic Survey Division, Korea Hydrographic and Oceanographic Administration)
  • 이대재 (부경대학교 해양생산시스템관리학부) ;
  • 곽민선 (신아종합) ;
  • 강희영 (국립해양조사원 수로측량과)
  • Received : 2014.03.03
  • Accepted : 2014.04.16
  • Published : 2014.06.30
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Abstract

The objective of this study was to design and develop a broadband ultrasonic transducer that has both wide bandwidth and high sensitivity to measure broadband echoes related to identifying fish species. A broadband ultrasonic transducer providing a nearly flat transmitting response band of 40.2-75.5 kHz with a -12 dB bandwidth of 35.3 kHz was achieved by integrating 12 tonpilz transducer elements operating at different resonance frequencies. The average transmitting voltage response, receiving sensitivity, and figure of merit values in this frequency band were 168.4 dB (re $1{\mu}Pa/V$ at 1 m), -196.8 dB (re $1V/{\mu}Pa$), and -28.4 dB, respectively. The results suggest that bandwidth and sensitivity can be widened and improved by adjusting the array pattern and the structure of tonpilz transducer elements.

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References

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  1. Bandwidth Enhancement of a Broadband Ultrasonic Mosaic Transducer using 48 Tonpilz Transducer Elements with 12 Resonance Frequencies vol.47, pp.3, 2014, https://doi.org/10.5657/KFAS.2014.0302