J0406-4-6 ガイド波多重反射エネルギー閉じ込め法による欠陥検出性能向上の検討(超音波計測・解析法の新展開(4))

概要

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A novel method called Multireflecting Guided wave Energy Trapping (MGET) Method has been developed for highly efficient defect detection in pipes and piping. In this method, sensitivity of defect detection is drastically improved, however its inspection area is restricted between the two reflectors placing on appropriate positions of pipe. When the guided wave is trapped and multireflected between the two reflectors, n combination of propagation paths having same path length are principally existed at n times multireflections. Therefore the defect signals were accumulated to be overlapped n times. Details of the principle and experimental demonstration are shown. The sensitivity of the MGET method was evaluated about 14 times larger than that of the conventional guided wave method.
社団法人日本機械学会の論文
2009-09-12