レーザー超音波同期差分法による裏面スリット散乱波の画像化

概要

論文の詳細を見る
We have already proposed a generation laser scanning method for visualizing ultrasonic waves propagating on 3-D objects. This method has the excellent feature that enables a visible and quick flaw inspection for actual object. However it is disadvantageous in that defect echoes are often hidden in the forward traveling wave because this method visualizes all waves propagating on the object. In this research we investigated the synchronizing differential method to extract defect echoes from the visualized images. The ultrasonic tests with aluminum plate and pipe having slits on the rear surface proved the validity of the synchronizing differential method, by which, we could visualize the slit echoes hidden in the forward traveling wave. These results demonstrated the usefulness of the laser-based ultrasonic visualization technique in flaw inspection.
社団法人日本機械学会の論文
2009-02-25