数据采集与处理2018，Vol.33Issue(3)：455-460,6.DOI:10.16337/j.1004-9037.2018.03.008
基于维纳滤波的超声增强实现方法
Implementation of Ultrasonic Enhancement Based on Wiener Filtering
摘要
Abstract
The propagating ultrasound is disturbed by the clutter ,which is resulted from interior disconti-nuities ,material impurities ,etc ..And the clutter may submerge the detected flaw reflection .Therefore , ultrasonic echo needs to be enhanced .Wiener filter is the common method of acoustic enhancement ,and here is utilized in the ultrasonic noise reduction .We give the procedure of the Wiener filter to process the ultrasound .Firstly ,initial noise power spectra of no pulse phases are statistically averaged .Then the power spectra of the ultrasound phase with clutter are adaptively calculated .Finally ,the Wiener filter is performed to each ultrasonic phase .The experiments of the ultrasonic data filtering under different sig-nal-noise-ratios are demonstrated that the proposed method is valid .Wiener filter has the same ability with spectral subtraction to reduce the noise superposed on the ultrasonic echo ,and is more effective .关键词
维纳滤波/超声/噪声降低/信噪比/回波Key words
Wiener filter/ultrasound/noise reduction/signal noise ratio/echo分类
信息技术与安全科学引用本文复制引用
沈希忠,叶秋泽..基于维纳滤波的超声增强实现方法[J].数据采集与处理,2018,33(3):455-460,6.基金项目
上海市科委(15ZR1440700)资助项目. （15ZR1440700）
