超声波检测中的小波降噪  

De-noising with Wavelet Technology in Ultrasonic Testing

作　　者：马驰[1] 岳艳侠[1] 肖兴明[1] 

机构地区：[1]中国矿业大学机电工程学院,徐州221008

出　　处：《数据采集与处理》2006年第B12期44-46,共3页Journal of Data Acquisition and Processing

摘　　要：分析了超声信号中的噪声来源;指出了对于超声检测,小波分析方法相对于其他数字信号处理手段所具有的优势;最后给出了应用实例。将相关硬件与在LabVIEW编程环境中所开发的软件有机结合,实现了超声探伤的功能。软件中小波降噪技术的应用提高了超声信号的信噪比及仪器的探伤性能。How to increase the signal to noise ratio in ultrasonic testing （UT） is discussed. The noise source of ultrasonic signals is analyzed and the advantage of the wavelet analysis for ultrasonic testing over other digital signal processing methods is pointed out. Finally, an example is given. In the example, the correlative hardware and the software developed with LabVIEW are combined to realize the ultrasonic testing function. The wavelet de-noising technology in the software increases the signal-to-noise ratio （SNR） and upgrades the testing performance of the instrument.

关 键 词：超声波检测 小波分析 降噪 虚拟仪器 LABVIEW 

分 类 号：TH878[机械工程—仪器科学与技术]