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Radiation flaw detection method and radiation flaw detector
Radiation flaw detection method and radiation flaw detector
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机译：放射线探伤方法和放射线探伤仪
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摘要
PROBLEM TO BE SOLVED: To provide a radiation flaw detection method and a radiation flaw detection device capable of performing inspection in a shorter time with a simple configuration without reducing detection performance.SOLUTION: A radiation flaw detection device 1 for detecting a defect of a hollow cylindrical member M made of metal by using a radiation comprises a plurality of pairs of radiation sources 2a, 2b making radiations incident from the outer side of the side surface of the hollow cylindrical member M and radiation sensors 3a, 3b detecting radiations having passed through the outer side of the side surface of the hollow cylindrical member M on the opposite side. When the detection limit defect size of the pairs of the radiation sources 2a, 2b and the radiation sensors 3a, 3b is expressed as dand the minimum defect size that is desired to detect is expressed as d in a case where the hollow cylindrical member M is a flat plate, a prescribed condition is satisfied by the maximum angle &phgr;among angles formed by radiation passages in a case where the radiation passages include the central axis O of the hollow cylindrical member M of each pair of the radiation sources 2a, 2b and the radiation sensors 3a, 3b on the relative coordinate with the position of the hollow cylindrical member M fixed.SELECTED DRAWING: Figure 1
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