2026-03-05T23:32:11Z https://kitami-it.repo.nii.ac.jp/oai

oai:kitami-it.repo.nii.ac.jp:00007410 2026-02-17T00:42:38Z 1:86

エコー波形の詳細解析による超音波探傷法の欠陥検出の定量的評価 DEFECT ESTIMATION FOR STEEL STRUCTURE BY USING QUANTITATIVE ANALYSIS OF REFLECTION WAVE IN ULTRASONIC INSPECTION 三上, 修一 大島, 俊之 菅原, 登 山崎, 智之 山崎 智之 open access waveform analysis 3D display ultrasonic inspection freq uency analysis 本論文では鋼板材料中に製作した疑似欠陥を用いて超音波探傷画像を求め，同時に欠陥から得られるエコー波形を用いて欠陥の大きさや傾きを精度良く求める方法について検討した。超音波探傷装罷には水浸式垂直探触子を用い，欠陥近傍より得られるエコー波形に詳細な波形解折・周波数解析等の言羊細回折を行い疑似欠陥の深さや大きさ，傾きに関する情報を得た。また，ワークステーション上のグラフィックソフトウェアを用いた波形の3次元処理は，エコー波形の特牲を詳細に検討する波形処理手法として有効であることを示した。:The C-scan images of artificial defects in a steel plate with 9 mm thickness are obtained by an ultrasonic inspection. The quantitative waveform analysis on the echos is performed for the estimation of reliable size and inclination of a defect. Two types of specimens are used. In the first type two specimens which have a channel type of groove defect with different depth, fire Used, In the second type a steel plate specimen with 9 mm thickness which has twelve artificial defect holes drilled with different depth, diameter and inclination, is used. By using an immersion type of transducer reflection waves returned from a defect are detected and stored on floppy disk. Those are used for waveform and spectrum analysis to get more accurate and detail information on defects. It is shown that 3 D display/rotation of reflection wave using graphic software of a workstation is very helpful for a precise waveform analysis of a reflected echo. application/pdf 社団法人 土木学会 1994-10 jpn journal article VoR https://kitami-it.repo.nii.ac.jp/records/7410 土木学会論文集 501 I-29 103 112 https://kitami-it.repo.nii.ac.jp/record/7410/files/8654428-15.pdf application/pdf 1.9 MB 2016-11-22