斜角探傷用アレイ探触子を用いたFSAP方式による内部欠陥の超音波画像化

• 中畑 和之

  愛媛大学大学院理工学研究科生産環境工学専攻

• 竹内 裕幸

  愛媛大学工学部環境建設工学科

• 木本 和志

  岡山大学大学院環境学研究科社会基盤環境学専攻

書誌事項

タイトル別名

• Ultrasonic Flaw Imaging by the FSAP Technique Using Array Transducer for Angle Beam Testing

抄録

There is a phased array technique which makes use of flaw echoes, measured by every two-element combination as a pulser and a receiver, to synthesize high amplitude beams for any arbitrary angle and/or focal depth. Using this full waveform sampling and processing (FSAP) technique, we show a flaw reconstruction method for the angle beam phased array ultrasonic testing. In the case of the angle beam testing, it is necessary to estimate a beam path from a wedge to a specimen appropriately and to consider the mode conversion at the wedge-specimen interface. The main feature of our method is the use of processed wave data, called “scattering amplitude”, which is extracted from each flaw echo. First, the basic principle of the reconstruction method is described and then some flaw reconstructions are demonstrated. The resolution of the flaw images and the accuracy of flaw sizing can be improved by means of the scattering amplitude.

収録刊行物

• 日本機械学会論文集Ａ編

  日本機械学会論文集Ａ編 77 (779), 1112-1122, 2011

  一般社団法人 日本機械学会

キーワード

• Nondestructive Inspection
• Ultrasonic Wave
• Array Transducer
• Angle Beam Testing
• Full-Waveform Sampling and Processing (FSAP) Technique
• Flaw Imaging

詳細情報

• CRID: 1390001204477817344
• NII論文ID: 130001049779
• DOI: 10.1299/kikaia.77.1112
• ISSN: 18848338
• ISSN: 03875008
• Web Site: http://www.jstage.jst.go.jp/article/kikaia/77/779/77_779_1112/_pdf
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