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匹配电路对夹心式压电换能器机电特性的影响。

Effect of the Matching Circuit on the Electromechanical Characteristics of Sandwiched Piezoelectric Transducers.

作者信息

Lin Shuyu, Xu Jie

机构信息

Shaanxi key Laboratory of Ultrasonics, Shaanxi Normal University, Xi'an 710119, China.

出版信息

Sensors (Basel). 2017 Feb 10;17(2):329. doi: 10.3390/s17020329.

DOI:10.3390/s17020329
PMID:28208583
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5336027/
Abstract

The input electrical impedance behaves as a capacitive when a piezoelectric transducer is excited near its resonance frequency. In order to increase the energy transmission efficiency, a series or parallel inductor should be used to compensate the capacitive impedance of the piezoelectric transducer. In this paper, the effect of the series matching inductor on the electromechanical characteristics of the piezoelectric transducer is analyzed. The dependency of the resonance/anti-resonance frequency, the effective electromechanical coupling coefficient, the electrical quality factor and the electro-acoustical efficiency on the matching inductor is obtained. It is shown that apart from compensating the capacitive impedance of the piezoelectric transducer, the series matching inductor can also change the electromechanical characteristics of the piezoelectric transducer. When series matching inductor is increased, the resonance frequency is decreased and the anti-resonance unchanged; the effective electromechanical coupling coefficient is increased. For the electrical quality factor and the electroacoustic efficiency, the dependency on the matching inductor is different when the transducer is operated at the resonance and the anti-resonance frequency. The electromechanical characteristics of the piezoelectric transducer with series matching inductor are measured. It is shown that the theoretically predicted relationship between the electromechanical characteristics and the series matching inductor is in good agreement with the experimental results.

摘要

当压电换能器在其共振频率附近被激发时，输入电阻抗表现为电容性。为了提高能量传输效率，应使用串联或并联电感来补偿压电换能器的电容性阻抗。本文分析了串联匹配电感对压电换能器机电特性的影响。得出了共振/反共振频率、有效机电耦合系数、电品质因数和电声效率对匹配电感的依赖性。结果表明，除了补偿压电换能器的电容性阻抗外，串联匹配电感还可以改变压电换能器的机电特性。当串联匹配电感增加时，共振频率降低，反共振频率不变；有效机电耦合系数增加。对于电品质因数和电声效率，当换能器在共振和反共振频率下工作时，它们对匹配电感的依赖性不同。测量了带有串联匹配电感的压电换能器的机电特性。结果表明，机电特性与串联匹配电感之间的理论预测关系与实验结果吻合良好。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/126e332a525f/sensors-17-00329-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/f880c52fd9ba/sensors-17-00329-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/973b12a9f820/sensors-17-00329-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/5e8147fde368/sensors-17-00329-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/c069e48ee26e/sensors-17-00329-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/a9b6d8641b9f/sensors-17-00329-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/8862a2605358/sensors-17-00329-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/d6187f7643a0/sensors-17-00329-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/8128675d43af/sensors-17-00329-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/3ea5e26a90e4/sensors-17-00329-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/c0d985a21129/sensors-17-00329-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/4058e17d0e80/sensors-17-00329-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/6abcd17f422a/sensors-17-00329-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/126e332a525f/sensors-17-00329-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/f880c52fd9ba/sensors-17-00329-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/973b12a9f820/sensors-17-00329-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/5e8147fde368/sensors-17-00329-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/c069e48ee26e/sensors-17-00329-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/a9b6d8641b9f/sensors-17-00329-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/8862a2605358/sensors-17-00329-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/d6187f7643a0/sensors-17-00329-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/8128675d43af/sensors-17-00329-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/3ea5e26a90e4/sensors-17-00329-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/c0d985a21129/sensors-17-00329-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/4058e17d0e80/sensors-17-00329-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/6abcd17f422a/sensors-17-00329-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2c0c/5336027/126e332a525f/sensors-17-00329-g013.jpg

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