高斯带通滤波器的设计及其在管道超声检测中的应用  

Design of Gaussian Band-pass Filter＆Application In Ultrasonic Testing of Oil Pipeline

作　　者：徐湖鹏[1] 薛德东[1] 卢成浪[1] 

机构地区：[1]温州大学瓯江学院,温州325035

出　　处：《计算机光盘软件与应用》2010年第4期28-29,共2页Computer CD Software and Application

摘　　要：本文分析了本文分析了由超声换能器，耦合剂，石油管道组成超声检测系统，得出了超声回波信号的数学模型，依据超声回波信号的数学模型，并利用最大信噪比原理设计出高斯带通滤波器，应用所设计的高斯带通滤波器对超声信号处理，大大提高了信噪比，有效的提取出缺陷信息。滤波后超声回波的包络的峰值对应着各个回波到达的时间。Ultrasonic non-destructive evaluation （NDE） is widely use for detection flaws in oil pipeline.For improving the signal to noise ratio （SNR） and extracting flaw echo corrupted by noise,Gaussian band-pass fdter is designed based on the model of ultrasonic echo signal.The analysis results show that it is effective to use Gaussian band-pass filter extracting the information of small flaw in pipeline NDE.The amplitude envelope of the processed ultrasonic signal after envelope detection obtains a notable SNR enhancement.

关 键 词：高斯带通滤波器 超声回波 缺陷 

分 类 号：TN713[电子电信—电路与系统]