The Application Of Ct Technology In Ultrasonic Flaw Detection In Concrete

Using ART and SRT algorithm, based on the research of image reconstruction theory, an ultrasonic-CT program is made. By applying the program to analyze the data of ultrasonic wave propagation time and initial wave amplitude about concrete testing models, CT images are performed, which reflect the variation of wave velocity and absorption coefficient in concrete testing models. The CT images~, which are drawn by the data of wave velocity, can reflect the location and the range of the flaw in concrete testing models by two-dimensional way.In addition, The quality of CT images were analyzed and compared at various conditions such as different algorithm, different computation precision, different image aftertreatment, different threshold value, different density of net, different frequency of transducer and different flaw combination in concrete testing models.At last, the limitation of the ultrasonic-CT and its development direction are discussed.