Temperature‐frequency characteristics simulation of piezoelectric resonators and their equivalent circuits based on three‐dimensional finite element modelling

Wakatsuki, Naoto; Kagawa, Y.; Suzuki, Katsuyori; Haba, Masanori

doi:10.1002/jnm.514

Cited by 17 publications

(11 citation statements)

References 8 publications

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“…The analysis is based on the finite element modelling including the piezoelectric effect [5][6][7][8][9] (3) where f (To) refers to the value at the reference temperature and f (T) refers to the resonance frequency, aT / hT and YT are called the first, second and third order temperature coefficients, which are generally measured with respect to the main crystal axes. By solving the matrix expression given above, vibration mode analysis, resonance frequencies, stress and electric potential distribution, and equivalent circuit parameters could be obtained.…”

Section: A Finite Element Methodanalysismentioning

confidence: 99%

Finite Element Method Design and Fabrication of Thermo-sensitive Quartz Tuning Fork Resonators as Temperature Sensor

You

2006

2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems

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Piezoelectric resonators have widely been utilized not only for time keeping devices but also for temperature measurement sensors. In order to obtain a temperature sensor having low power consumption, low cost, fast response, high sensitivity and high precision, resonance frequency of quartz tuning fork crystal for use in temperature sensor was analyzed by the finite element method (FEM). FEM was used to model optimum tuning fork geometry, tine tip and tine surface electrode shape and thickness with a resonance frequency close to 40 kHz as design targets. This type of sensor was designed with a new ZYtw-cut was proved that working at flexural vibration mode was better than at the others. The fabrication of resonators was realized by employing photolithography and chemical etching. Moreover tuning fork resonators were further processed for packaged in holders and filled with helium 90 Pa and thus fabricated were evaluated by measuring resonance frequency. The results of the experiment show that it is possible to construct a miniature and an excellent quartz tuning-fork temperature sensor.

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Section: A Finite Element Methodanalysismentioning

confidence: 99%

Finite Element Method Design and Fabrication of Thermo-sensitive Quartz Tuning Fork Resonators as Temperature Sensor

You

2006

2006 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems

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“…In previous research [11][12][13], it is feasible to use a FEA approach to estimate temperature rise experienced in a typical ultrasonic transducer due to dielectric loss and vibration. Applying the COMSOL model, heat generation in an ultrasonic transducer due to electric potential and vibration can be determined and evaluated clearly [23].…”

Section: Analysis Of Heat Generation and Temperature Rise For Multi-lmentioning

confidence: 99%

“…In addition, an input inductor L in was used to ensure the zero-voltage-switching (ZVS) condition. Considering the high conversion output power and efficiency of the overall PT-based DC/DC converter, the ZVS condition should be ensured simultaneously by using the input inductance L in and the PT input capacitance C 1 [11]. It should be noted that because of the large value of the filtering capacitor C F , the PT output voltage v rec is not a sine wave.…”

Section: Pt-based Converter Circuit Diagram and Its Operationmentioning

confidence: 99%

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Design of piezoelectric transformer-based DC/DC converter to improve power by using heat transfer equipment

Liu

Vasić

et al. 2014

JAE

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In this paper, we propose a new design of a piezoelectric transformer (PT) for low-profile DC/DC converter applications, which increases the output power by using heat transfer equipment. We examined several parameters, which allow us to produce a piezoelectric transformer with optimal efficiency. Instead of looking at the typically optimal loading condition of the PT, we consider the influence of the temperature rise on losses. When the vibration velocity is too large, the piezoelectric transformer generates heat unstably until it cracks. By maintaining the vibration mode and limiting the heat produced by the PT, this design can enhance the power capacities of the PT and thus increase the output power of the DC/DC converter. A finite element analysis (FEA) approach with COMSOL Multiphysics was made to predict PT's working temperature. A theoreticalphenomenological model was also developed to explain the relationship between the equivalent losses resistances and the input voltage at different temperatures. It will be shown that the vibration velocity as well as the heat generation increases the losses. A large vibration velocity and generated heat may cause the temperature feedback loop to enter into an unstable state. We began by modeling a piezoelectric transformer in a DC/DC converter configuration in order to determine the design constraints and variables such as the maximum mechanical current, the temperature distribution, the PT geometrical configuration and the energy balance. In our design, the PT power capacity increases 3 times (i.e. from 4.54 W to 13.29 W) at specific temperature and the effects of the different cooling methods of the system were verified. The study comprises of a theoretical part and experimental proof-of-concept demonstration of the proposed design method.

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“…Quartz thermometers have a very linear output characteristic over the temperature range between -40°C and +230°C. The measurement resolution of temperature is 0.1°C [4,5].…”

Section: Introductionmentioning

confidence: 99%

Novel designs for quartz tuning fork temperature sensor

Yang

2011

Proceedings of 2011 6th International Forum on Strategic Technology

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In this paper mainly describes a quartz tuning fork temperature sensor based on bending vibration. The main working components of quartz tuning fork temperature sensor are quartz tuning fork and driving circuit, according to the piezoelectric effect principle of quartz crystal, researching on correlative incentive mode, selecting cut type and setting electrodes reasonably, and applying finite element method and Matlab to simulate and analyze the vibration mode as well as temperature and frequency characteristic. The experiment proves that it doesn't have increment error that brought by A/D converter, and it can be compatible with high speed digital systems, at the meanwhile it has high precision, low cost, small size, great developing potential. The experimental results shown that a temperature accuracy of 0.01 °C and a resolution of 0.005 °C within temperature range from 0 °C to 100 °C. All these research are helpful to design satisfactory performance of the sensor for temperature measurement.

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Temperature‐frequency characteristics simulation of piezoelectric resonators and their equivalent circuits based on three‐dimensional finite element modelling

Cited by 17 publications

References 8 publications

Finite Element Method Design and Fabrication of Thermo-sensitive Quartz Tuning Fork Resonators as Temperature Sensor

Finite Element Method Design and Fabrication of Thermo-sensitive Quartz Tuning Fork Resonators as Temperature Sensor

Design of piezoelectric transformer-based DC/DC converter to improve power by using heat transfer equipment

Novel designs for quartz tuning fork temperature sensor

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