旧版下载已关闭,请移步到新版下载(点击打开新版

Application of the digital m atched-filter technique to ultrasonic non-destructive testing

资料来自用户(Valentina)上传,若本站收录的文献无意侵犯了您的著作版权,请点击版权申明
文献出处
Chinese Journal of Acoustics  1992年02期
机 构
Department,of,Applied,Science,City,Polytechnic,of,Hong,Kong
论文摘要

Acoustic-pulse compression is obtained in systems with differenttimebandwidth products by applying the digital matched-filter technique toultrasonic non-destructive testing.The signal is linearly frequency-modulated(LFM)pulse and the digitized electrical-excitation signalitself is used as a digita1 matched filter.Experimental results are in goodagreement with theory.Suppressions of side lobes achieve -41.9 dB and-41.5 dB for the Hamming and Gaussian weighted signals respectively.It shows that the application of the digital matched-filter technique im-proves the performances of a ultrasonic testing system explicitly.

全文下载
全文下载