Abstract：The deconvolution techniques were adopted to improve the vertical resolution of ultrasonic pre-stack migration imaging profiles of the concrete structures. Firstly,the theories of deconvolution and pre-stack migration imaging were introduced. Secondly,the deconvolution was used to sharpen the first wave of the Ricker pulse signal and the arbitrary collection of ultrasonic signal. Thirdly,the deconvolution was applied to deal with the collected signals and the pre-stack migration imaging data. The experiments were carried out on concrete samples with preinstalled internal defect. The results show that deconvolution techniques can not only sharpen a single pulse or random one of the wave arrival of test signals for engineering structure,but also can sharpen the edge damage,and increase the resolution of pre-stack migration section in the pre-stack migration imaging technology.
2009, Vol. 30 
