| 摘要 |
PURPOSE:To derive exactly a grade classification of the JIS standard of a flaw detecting defect by using a manual ultrasonic flaw detecting device, placing a flaw detector on a flaw detecting material, placing a flaw detecting data on a reference material, obtaining a reference data, and applying them to a data processor. CONSTITUTION:A flaw detecting data is obtained by a flaw detector against a weld line 12 of a flaw detecting material 10. In this case, the flaw detector 24 is moved to an X axis 21 and a Y axis 22, and a scan is executed. Subsequently, data of a beam path and an echo height are obtained by an ultrasonic flaw detector 30, and recorded in a data recording device (a cassette, etc.) 40. Also, data of the X axis 21, the Y axis 22, etc., and a reference data obtained in advance are stored in the cassette 40. Subsequently, said data are inputted to a data processor 50, a distance amplitude characteristic of the reference data is derived, and from said characteristic and the flaw detecting data, a point data and a line data are derived with regard to a defective part. A length of the defect is derived from the line data, and also a grade of the defect of the JIS standard is classified from each data of an area of an echo height and a plate thickness. Accordingly, the grade of the defect can be classified by the flaw detecting data and the reference data. |
