| 实际支承工况下压电换能器等效电路实验研究 |
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| 引用本文： | 周宏权,韩雷.实际支承工况下压电换能器等效电路实验研究[J].压电与声光,2006,28(5):543-544,548. |
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| 作者姓名： | 周宏权 韩雷 |
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| 作者单位： | 中南大学,机电工程学院,湖南,长沙410083 |
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| 基金项目： | 国家自然科学基金资助项目(50390064,50429501)，“九七三”计划资助项目(2003CB716202) |
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| 摘 要： | 利用直接数字合成器(DDS)对夹心式换能器进行扫频,测得两个不同共振频率附近的导纳圆。通过导纳圆实验数据拟合,获得相应的等效电路参数。结果表明,在换能器不同振动模态下,等效并联电容电阻并非恒定值,而且实际支承工况下换能器系统工作时存在负阻尼效应。
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| 关 键 词： | 超声键合 夹心式压电换能器 导纳圆拟合 等效电路 |
| 文章编号： | 1004-2474（2006）05-0543-02 |
| 收稿时间： | 2005-03-18 |
| 修稿时间： | 2005-03-18 |
Experimental Studies of Equivalent Circuit for Operating-mode Piezoelectric Transducer |
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| ZHOU Hong-quan,HAN Lei.Experimental Studies of Equivalent Circuit for Operating-mode Piezoelectric Transducer[J].Piezoelectrics & Acoustooptics,2006,28(5):543-544,548. |
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| Authors: | ZHOU Hong-quan HAN Lei |
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| Affiliation: | Central South University, Changsha 410083, China |
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| Abstract: | The direct digital synthesizer(DDS) is used to sweep frequency for a sandwich piezoelectric transducer two admittance circles of the transducer about two different resonance frequencies is measured.With admittance circle fitting to experiment data,equivalent circuit parameters can be obtained.The result shows,under different vibration mode,equivalent parallel capacitance and resistance are not constant value.There is negative damp effect in transducer system at the operating mode. |
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| Keywords: | ultrasonic bonding sandwich piezoelectric transducer admittance circle fitting equivalent circuit |
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