軟鋼ワイヤの探傷における送信波形の最適化

• 山崎 友裕

• 玉井 進悟

• 平尾 雅彦

書誌事項

タイトル別名

• Optimum Excitation Signal for Longitudinal Wave in Steel Wires.
• ナンコウ ワイヤ ノ タンショウ ニ オケル ソウシン ハケイ ノ サイテキカ

抄録

Optimization of excitation signal is proposed for inspection of a thin steel wire by longitudinal wave. In flaw detection of the wire throughout a longe range, the longitudinal wave, which propagates along the length, will be a useful tool. The short pulse is suitable for achieving high spatial resolution of location of the flaw. However, the velocity of longitudinal wave in the wire shows the frequency dependence. This dispersion distorts the waveform, and it results in the decrease of the signal amplitude. If the effect of dispersion is removed, the signal to noise ratio is expected to be improved and the high flaw detectability can be obtained. In this study, we suggest to use the optimum excitation signal, which is so modified to compensate for the dispersion during the propagation of assumed path length. It is ensured that the flaw, which occupies 10% of the cross-sectional area of the wire, can easily be detected from 10 m away.

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 65 (633), 1044-1050, 1999

  一般社団法人 日本機械学会

キーワード

• Ultrasonic Inspection
• Iron and Steel
• Fast Fourier Transform
• Wire
• Dispersion
• Electromagnetic Acoustic Transducer

詳細情報

• CRID: 1390001204448253312
• NII論文ID: 110002374984
• NII書誌ID: AN0018742X
• DOI: 10.1299/kikaia.65.1044
• ISSN: 18848338
• ISSN: 03875008
• NDL書誌ID: 4741915
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4741915
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/65/633/65_633_1044/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可