摘要
本文描述了轴向-切向连通的圆柱2－2型压电复合材料．用PZT／环氧树脂制作的普通2－2型压电复合材料可以拼接成一种具有扭转振动的压电复合材料．这种压电复合材料可以作为圆柱2－2型压电复合材料的近似．本文还给出两组这种拼接型压电材料晶片的参数，用这种压电材料制作了产生扭转振动的换能器，测试了换能器的波形、频谱特性和偏振特性，指出了使用适当的高通滤波器可以抑制横波中的径向模，分析了接收波列中纵波抑制较强的原因．
A cylindrical 2-2 piezocomposite with axial and tangential connectivity is de scribed. The torsional piezocomposite materials, which approximate the cylindrical 2-2 piezocomposites, are made by piecing together the ordinary 2-2 piezocomposite of PZT/e-poxy. Two such blocks are fabricated, and their characteristics are measured. From them, transducers with torsional modes are then built, of which the waveforms, spectra and acoustic polarization are tested. A proper high-pass filter is used to eliminate the radi al mode in the transverse waveform. The reason for the weakness of the compressional wave in the received waveform is analyzed.
出处
《应用声学》
CSCD
北大核心
1997年第2期7-13,共7页
Journal of Applied Acoustics
基金
国家自然科学基金
关键词
压电复合材料
超声换能器
横波换能器
换能器
Piezocomposites, Ultrasonic transducers, Transverse wave transducers,Torsional shear modes
