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采用曲线滑尺计算尺上缺陷的距离变化dB数是根据声程计算的。但是实际探伤时为了便于缺陷定位,宜将时间扫描线的读数代表缺陷的垂直(或水平)距离。声程与垂直(或水平)距离虽然只是简单的直线比例关系,但在实际探伤时,若再要进行此项计算则非常不便。此外对于厚焊缝,如果需要把材质的衰减考虑在内,则对不同声程的缺陷都另外要计算材质衰减的dB值。无
The change in distance using the slide rule to calculate the defect on the ruler dB is calculated based on the sound path. However, in actual flaw detection, in order to facilitate the localization of defects, it is advisable to take the time line readings to represent the vertical (or horizontal) distance of defects. Sound path and vertical (or horizontal) distance although only a simple straight line proportional relationship, but the actual flaw detection, if you want to make this calculation is very inconvenient. In addition, for thick welds, if the attenuation of the material needs to be taken into account, then the dB of material attenuation must be calculated separately for defects of different sound paths. no