• 제목/요약/키워드: Piezoelectric pressure transducer

검색결과 44건 처리시간 0.022초

예압에 따른 압전 변환기의 공진특성 변화 (Variation in the Vibration Characteristics of a Piezoelectric Transducer due to Pre-pressure)

  • 김대승;김진오
    • 한국소음진동공학회논문집
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    • 제16권1호
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    • pp.89-100
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    • 2006
  • This paper presents an analytical approach to describe the variation in the vibration characteristics such as the natural frequency of a piezoelectric transducer under static pre-pressure. The transducer considered in this paper is a bolt-clamped Langevin-type transducer, which consists of a couple of piezoelectric discs, a couple of metal blocks for added mass effect, and a bolt to tighten them. A new analysis model for the transducer has been developed by taking into account the contact area between the piezoelectric ceramic disc and the metal block. The variation of the resonance frequency due to the pre-pressure has been calculated and compared with measured results reported earlier.

예압에 따른 압전 변환기의 공진 특성 (Variation In the Vibration Characteristics of Piezoelectric Transducers due to Pre-Pressure)

  • 김대승;김진오
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 춘계학술대회논문집
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    • pp.484-487
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    • 2005
  • This paper presents an analytical approach to describe the variation in the vibration characteristics such as the natural frequency of a piezoelectric transducer under static pre-pressure. The transducer considered in this paper is a bolt clamped Langevin type transducer, which consists of a couple of piezoelectric discs, a couple of metal blocks for added mass effect, and a bolt to tighten them. A new analysis model for the transducer has been developed by taking into account the contact area between the piezoelectric ceramic and the metal block. The variation of the resonance frequency due to the pre-pressure has been calculated compared with other results.

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압전 변환기의 내부 불완전 접촉을 고려한 해석 모델 (Analysis Model of a Piezoelectric Transducer with Incomplete Contact)

  • 김대승;김진오
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 추계학술대회논문집
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    • pp.864-868
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    • 2005
  • This paper develops an analysis model of a piezoelectric transducer. The transducer considered in this paper is a bolt-clamped Langevin-type transducer, which consists of a couple of piezoelectric discs, a couple of metal blocks for added mass effect, and a bolt to tighten them. A new analytical model for the transducer has been developed by taking into account the contact area between the piezoelectric ceramic and the metal block. The analysis model is verified by calculating the variations of the resonance frequency due to the contact area and comparing them with reported experimental results.

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압전식 압력센서에서 발생하는 열충격 효과 정량화 (Quantification of Thermal Shock in a Piezoelectric Pressure Transducer)

  • 이석환;최욱;배충식
    • 한국자동차공학회논문집
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    • 제13권5호
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    • pp.96-103
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    • 2005
  • One of the major problems limiting the accuracy of piezoelectric transducers fur cylinder pressure measurements in an internal combustion (IC) engine is the thermal shock. Thermal shock is generated from the temperature variation during the cycle. This temperature variation results in contraction and expansion of the diaphragm and consequently changes the force acting on the quartz in the pressure transducer An empirical equation for compensation of the thermal shock error was derived from consideration of the diaphragm thermal deformation and actual pressure data. The result indicate that the thermal shock equation provides reliable correction based on known surface temperature swing.

결합형 유한요소-경계요소 기법을 사용한 심해저용 압전형 유연성 쏘나 변환기의 시뮬레이션 (Simulation of a piezoelectric flextentional deep-water sonar transducer using a coupled FE-BEM)

  • 장순석;이제형;안흥구;최현호
    • 한국음향학회:학술대회논문집
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    • 한국음향학회 1999년도 학술발표대회 논문집 제18권 1호
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    • pp.218-223
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    • 1999
  • A piezoelectric flextentional deep-water sonar transducer has been simulated using a coupled FE-BEM. The dynamics of the sonar transducer is modelled in three dimensions and is analyzed with extern리 electrical excitation conditions as well as external acoustic pressure loading conditions. Different results are available such as steady-state frequency response for RX and TX, displacement modes, directivity patterns, back-scattering patterns, resonant frequencies, bandwidths, quality factors, transmitting voltage (TV) responses, input receiving sensitivity (RS) responses. White the present barrel-stave typed sonar transducer of the piezoelectric material is being simulated, the external surface of the transducer is modified in order to allow the same water pressure to be applied to the inner and the outer surfaces of the transducer. With this modification for deep-water application, the resonance frequency of the modified flextentional sonar transducer becomes much lower than that of the unmodified flextentional sonar transducer. The results of the present sonar transducer modelling are also compared with those of a commercial package such as ATILA.

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Simulation of Piezoelectric Dome-Shaped-Diaphragm Acoustic Transducers

  • Han, Cheol-Hyun;Kim, Eun-Sok
    • JSTS:Journal of Semiconductor Technology and Science
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    • 제5권1호
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    • pp.17-23
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    • 2005
  • This paper describes the simulation of a micromachined dome-shaped-diaphragm acoustic transducer built on a $1.5{\mu}m$ thick silicon nitride diaphragm ($2,000{\mu}m$ in radius, with a circular clamped boundary on a silicon substrate) with electrodes and piezoelectric ZnO film in a silicon substrate. Finite element analysis with ANSYS 5.6 has been performed to analyze the static and dynamic behaviors of the transducer under both pressure and voltage loadings.

압전형 압력센서의 교정기법 자동화 (An automatic calibration technique for piezoelectric pressure sensors)

  • 최주호;유준
    • 제어로봇시스템학회논문지
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    • 제3권4호
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    • pp.357-362
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    • 1997
  • This paper suggests an automatic calibration technique for piezoelectric low pressure transducer measuring a pressure blow 500psi. The present calibration system embedded with error correction algorithm generates it's best you don't cut parts of wards like so dynamic pressure and compensates offset voltage and pressure error. It is shown via experimental results that the instrumentation accuracy has been improved and mean time between calibrations has been shortened.

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PMN-PT-PZ계를 이용한 압전소자의 설계 및 음향특성 (Design and Acoustic Properties of Piezoelectric Device with the PMN-PT-PZ System)

  • 고영준;서희돈;남효덕;장호경
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 영호남학술대회 논문집
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    • pp.283-286
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    • 2000
  • In this study, the acoustic transducer of a thin circular disc-type with PZT/Metal was manufactured. The piezoelectric transducer with 200kHz resonance frequency was designed by considering the sharp directivity and the sound pressure. The dielectric and piezoelectric properties of 0.5 weight percent $MnO_2$ and NiO doped $0.1Pb(Mg_{1/3}Nb_{2/3})O_3-0.45PbTiO_3-0.42PbZrO_3$ ceramics were investigated aiming at acoustic transducer applications. Also, the acoustic characteristics of a thin circular disc-type with metal-piezoceramics have been Investigated.

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PZT/Metal로 구성된 음향변환기의 음향특성에 관한 연구 (A Study on the Acoustic Properties of Acoustic Treansducer with PZT/Metal)

  • 김진수;강대하;김소정;김호기;이덕출
    • 한국음향학회지
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    • 제11권2호
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    • pp.28-37
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    • 1992
  • 본 연구에서는 압전 특성이 우수한 PZT계 압전세라믹스를 원판상으로 박판화하여 금속 진동판에 부착시킨 PZT/Metal음향변환기를 제작하였다. 이 때 압전 세라믹스를 박판화하기 위해 'tape casting 방법‘을 사용했으며, 제작된 PZT/Metal 음향 변환기를 압전 부자, 압전 스피커등의 소자에 응용 시키기 위해 음향특성을 연구하였다. 연구 결과, 세라믹스의 압전 계수($d_{31}$)이 증가함에 따라 레벨(dB)이 -6dB에서 - 14dB로 증가된다. 음향 변환기의 직경비 ${\eta}$가 0.7-08이고, 두꺼비 (${\beta}$)가 1일 때 최적 음압 특성을 나타냈으며, 음압은 -15~-16dB정도이었다.

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치과 임플란트 수술용 고출력 초음파 수술기 설계 및 제작 (Design and Fabrication of a High Power Piezoelectric Ultrasonic Surgery Unit for Dental Implantation)

  • 김나리;전대우;김진호;김선욱;황종희;이정배;최성재;임대진;이영진
    • 한국전기전자재료학회논문지
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    • 제30권10호
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    • pp.656-664
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    • 2017
  • This paper presents the design and fabrication of a high power piezoelectric ultrasonic surgery unit for multi-purpose dental implantation. A conventional piezoelectric ultrasonic surgery units consists of a transducer and a tip. However, the drawback of this simple structure is that the output performance of the transducer considerably changes with the change of the tips. An ultrasonic surgery unit that has an additional booster between the transducer and the tip can solve this problem to some extent; for this, an optimal structural design for the transducer is required. We used the Bolted Langevin Transducer (BLT) as the basic transducer; it consists of piezoelectric ceramics and a metal body. It's structure was optimized using mathematical methods to determine the length and radius of the tail and head masses. Additionally, the booster was also subjected to the same methods. Using these mathematical methods, optimal results in terms of the resonance frequency (24.96 kHz), displacement ($14.27{\mu}m$), and pressure (2.8 MPa), could be obtained. The validity of this proposed surgery unit was confirmed experimentally, exhibiting a cutting force of around 7% higher than that of a conventional surgery unit.