| 摘要 |
PURPOSE:To carry out flaw detection enhanced in flaw detection capacity and reduced in erroneous diagnosis by extracting a reflected wave exceeding a specific level from flaw detection data composed of reflected waves obtained by a horizontal wave vertical probe. CONSTITUTION:A ultrasonic flaw detection apparatus 6 drives a horizontal wave vertical probe 5 to perform the transmission and reception of ultrasonic waves and a data recording apparatus 7 records the peak generating time of the flaw detection signal obtained in a time detection part 64 and the echo level obtained in a level converting part 65 as flaw detection data to send out the same to an operational processing apparatus 8. The apparatus 8 performs the time reversal of a signal, subtraction processing and the identification of an echo on the basis of the flaw detection data from the apparatus 7 and the estimation data from an input apparatus 10. When fundamental flaw detection data preliminarily collected and having no flaw is recorded on a recording medium, a data regeneration apparatus 11 reads the data to regenerate the same and sends out the same to the apparatus 8. An output apparatus 9 allows an echo exceeding a threshold level to correspond to the shape of an object to be inspected and outputs whether the echo is generated by a flaw, a shape or noise. |
