Use of Trapped-Energy Mode of Backward-Wave-Type Thickness Vibration for Liquid-Level Sensing

Seto, Shuichi; Horiuchi, Shuhei; Yamada, Ken

doi:10.1143/jjap.49.07hc05

Cited by 17 publications

(10 citation statements)

References 6 publications

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“…Variations in real part G of the electric admittance (or R of the impedance), against h at the resonance (or anti-resonance) point were measured using an impedance/material analyzer (E4991A; Agilent Technologies Inc.). Variations in R at the anti-resonance are adopted for sensing by resonator B because the use of anti-resonance presents advantages over the use of the resonance for energy trapping of this type [3], [4].…”

Section: Methodsmentioning

confidence: 99%

Use of inharmonic modes of trapped-energy resonators for liquid-level sensing

Yamada

Seto

Horiuchi

2011

2011 IEEE International Ultrasonics Symposium

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The authors have been studying a new sensor device that employs a piezoelectric thickness vibrator operating in a trapped-energy mode for detecting slight variation in a liquid level. Both conventional type and backward-wave type trappedenergy resonators can produce inharmonic modes around the main resonance under specific conditions. The decay factor determining the profile of the evanescent field differs between the fundamental and inharmonic modes. Therefore, performance for the liquid level sensing is regarded as different depending on which of the two modes is employed. In this paper, some results of experiments are presented to confirm the prediction described above. Gradual variations in resonance or anti-resonance characteristics with liquid level have been observed when inharmonic modes are used.

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Section: Methodsmentioning

confidence: 99%

Use of inharmonic modes of trapped-energy resonators for liquid-level sensing

Yamada

Seto

Horiuchi

2011

2011 IEEE International Ultrasonics Symposium

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“…95,96,126,128,129,[136][137][138] Moreover, some studies have considered measurement techniques related to liquids such as acoustic properties including nonlinearity, and the depth or level of a liquid. [139][140][141][142][143][144][145] The measurement techniques Source s(t)…”

Section: Measurement Techniques Imaging Nondestructive Evaluationmentioning

confidence: 99%

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Mizutani¹,

Wakatsuki²,

Ebihara³

2016

Jpn. J. Appl. Phys.

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Measurementthe act of measuring physical properties that we performhas the potential to contribute to the successful advancement of sciences and society. To open doors in physics and other sciences, various measurement methods and related applications have been developed, and ultrasound has remained a useful probe, power source, and interesting measurement object for the past two centuries. In this paper, we first summarize the basic principles of ultrasound from the viewpoint of measurement techniques for readers who just have started studying or are interested in the field of ultrasonic electronics. Moreover, we also introduce recent studiesultrasonic properties of materials, measurement techniques, piezoelectric devices, nonlinear acoustics, biomedical ultrasound, and ocean acousticsand their trends related to measurement techniques in ultrasonic electronics to provide some ideas for related applications.

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“…(1) Upon electrode mass loading, the resonance frequency of the excitation electrode region is lower than that of other regions. (2) This results in the thickness-shear (TS) vibration mode being excited in the excitation electrode region, and the corresponding vibration decays exponentially outside. To achieve a high Q-factor for a high-frequency resonator, the resonator structure should be optimized to confine vibration energy in the excitation electrode region efficiently.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of Support for a Planoconvex Quartz Resonator

2018

Sensors and Materials

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In this paper, we report the optimal design of a support for a fundamental planoconvex ATcut quartz resonator fabricated using our newly developed etching process. We established a three-dimensional finite element model and carried out eigen-frequency analysis. To describe quantitatively the energy trapping performance of the resonator, we introduced a parameter called the energy trapping rate, which is defined by the ratio of the vibration energy inside to that outside of the electrode region. Two types of our new designs were evaluated in this work, and the optimal one for providing a large energy-trapping rate was determined. On the basis of the calculated results, we fabricated resonators and measured their Q-factors. The calculated and experimental results show an improvement in the efficiency of resonator performance. High Q-factors were also obtained.

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Use of Trapped-Energy Mode of Backward-Wave-Type Thickness Vibration for Liquid-Level Sensing

Cited by 17 publications

References 6 publications

Use of inharmonic modes of trapped-energy resonators for liquid-level sensing

Use of inharmonic modes of trapped-energy resonators for liquid-level sensing

Introduction of measurement techniques in ultrasonic electronics: Basic principles and recent trends

Optimal Design of Support for a Planoconvex Quartz Resonator

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