센서학회지 (Journal of Sensor Science and Technology)

  • 제13권6호
  • /
  • Pages.417-423
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  • 2004
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  • 1225-5475(pISSN)
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  • 2093-7563(eISSN)
한국센서학회 (The Korean Sensors Society)
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압전 횡효과를 이용한 무지향성 주파수가변 초음파트랜스듀서

Frequency Controllable Wide-Beam Ultrasonic Transducer with Transverse Mode

  • 김정순 (부경대학교 자연과학대학 물리학과) ;
  • 김무준 (부경대학교 자연과학대학 물리학과) ;
  • 하강렬 (부경대학교 자연과학대학 물리학과) ;
  • 강갑중 (부경대학교 자연과학대학 물리학과)
  • 발행 : 2004.11.30
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초록

In order to obtain wide-beam characteristics and variable resonant frequency of a ultrasonic transducer for the array source, an electrode of transverse mode piezoelectric vibrator is divided, and an electronic inductance is connected to the divided electrodes. The electronic inductance is made by GIC (General Impedance Converter) circuit. Because the GIC circuit is made of OP-Amps and other passive elements, the value of the inductance can be selected easily. As the results, the electronic inductance is variable in the range from 0.2 mH to 1.2 mH. Using the inductance, the resonance frequency of the transducer can be changed in the range from 73 kHz to 86 kHz. In the directivity of the transducer, it is confirmed that the beam width of the transducer is wider than $80^{\circ}$ at -3 dB in water.

키워드

참고문헌

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  2. 하강열, 김무준, 강갑중, 현병국, 채민구, 今野和彥, '2차원 배열 수중 청음기의 제작과 초음파 음장 측정에의 응용', 센서학회지, 제10권 제5호, pp.320, 2001
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피인용 문헌

  1. Estimation of Characteristics Change on Transverse Mode PZT Vibrator Under Space Environment vol.31, pp.8, 2012, https://doi.org/10.7776/ASK.2012.31.8.514