Abstract
As for ultrasonic flaw detection of the axle and the pillar, the inspection by the reflection echo is done. The judgment from a wave pattern contains subjectivity, and the judgment is different in the beginner and the expert. As a technique for objectively judging it, I studied a method to make internal structure visible with an image reconstruction method. About the measurement method necessary for the image reconstruction, I measured a reconfiguration image by the change in the number of receiving sensors and the number of transmission places. As a result, I measured its examination body that had imitated the axle with the ultrasonic test equipment. I did the experiment that reconfigured the image was done by using the measurement data. By designing and producing the jig, I was able to measure the propagation path difficult to measured up to now. As a result, the accuracy of a image reconstruction improved, and the defect in the examination body was able to be detected. The same experiment was conducted by using the examination body that inserted a different metal, and the part where speed of sound was different in a image reconstruction was able to be judged.
