| 耿学仓,杨玉瑞,党长久,李明轩.一种非均匀厚度压电复合材料片宽带换能器的实验研究[J].,1995,14(2):21-26 |
| 一种非均匀厚度压电复合材料片宽带换能器的实验研究 |
| Laboratory investigation of a wideband transducer using nonhomogeneousthickness piezocomposite material |
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| 中文摘要: |
| 本文利用1-3压电复合材料作为换能元件，通过特殊工艺制备成一面是平面、一面是球面的非均匀厚度压电振子．这种压电晶片加上激励电压后，不同厚度处以不同的共振频率振动，从而使压电晶片的振动频带加宽．本文介绍了这种压电晶片的机电特性，以及用这种压电晶片制成的宽带聚焦超声换能器的脉冲回波特性。此外，文中还对这种换能器与均匀厚度压电晶片换能器的脉冲回波特性进行了比较． |
| 英文摘要: |
| It is described in this paper that a nonhomogeneous-thickness transducer with one face being plane whereas the other concave was manufactured by using 1-3 piezocomposite material. The bandwidth of the transducer, excited by an electrical impulse, is increased because of the different resonant frequencies corresponding to the different thicknesses in the piezocomposite. Also presented are the electromechanical coupling characteristics of the uneven piezocomposite plate, the pulse echo characteristics of a wideband ultrasonic focusing transducer and comparisons of the pulse echo characteristics of transducers with respectively nonhomogeneous and homogeneous thicknesses. |
| DOI：10.11684/j.issn.1000-310X.1995.02.005 |
| 中文关键词: 换能器 压电复合材料 非均匀厚度压电片 |
| 英文关键词: Transducers Piezocomposites Piezoelectric plate of nonhomogeneous thickness |
| 基金项目:国家自然科学基金 |
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