Recovery of Acoustic Signal Distorted with Attenuation and Dispersion in Pulsed Electro-acoustic Method
Recovery of Acoustic Signal Distorted with Attenuation and Dispersion in Pulsed Electro-acoustic Method
复制标题
脉冲电声法中衰减和色散失真的声信号的恢复
DOI：
10.1541/ieejfms1990.115.5_418
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发表时间：
1995
影响因子：
--
通讯作者：
T. Takada
中科院分区：
文献类型：
--
作者：
K. Murata;Ying Li;Y. Tanaka;T. Takada
采用脉冲电声法测量介质材料中的空间电荷分布。在该方法中，电荷分布被检测为声波信号，所述声波信号是在施加的脉冲电压下由样本中存在的电荷产生的。然而，在诸如低密度聚乙烯的软聚合物样品中，衰减和色散在通过样品传播期间使声波波形失真。为了获得不失真的波形，采用使用“雅可比方法”的所谓“反卷积处理”。本文讨论了反卷积处理的原理，并介绍了一些恢复的实例。
Pulsed electro-acoustic method is applied to the measurement of space charge distribution formed in dielectric materials. In this method, charge distribution is detected as the acoustic wave signals which are generated by the charges existing in the sample under an applied pulse voltage. In the soft polymer sample such as low-density polyethylen, however, the attenuation and dispersion distort the acoustic waveform during the propagation through the sample. To obtain the undistorted waveform, so-called "deconvolution processing" using "Jacobi method" is employed. In this report, the principle of the deconvolutipn processing is discussed and some examples of the recovery is introduced.