| 摘要 |
PURPOSE:To surely decide defect shapes with simple constitution by discriminating the shapes of the echo signal peak value-converting element position curves of multiple ultrasonic wave converting elements by a computer. CONSTITUTION:Ultrasonic waves are transmitted simultaneously from a mosaic- shaped ultrasonic wave converting elements 41- forming an ultrasonic probe 4 to a material 1 to be tested, and the echo signals by the elements 41 are stored in the storage part of a microcomputer 11 by way of an analog switch 8, a detecting circuit 9 and an A/D converter 10 of a signal processing circuit 7. In the same manner, the echo signals of the elements 42- are successively stored, whereby echo signal peak value-element position curves are formed. The computer 11 compares the peak valu- element position curves of every defect shape having beforehand been stored with the formed curves, decides defect shapes and displays the same in a display device 12. With this simple constitution, the defect shapes are decided surely and determined. |
