SSPによる板波探傷システムの高性能化

• 永田 泰昭

  新日本製鐵(株)環境・プロセス研究開発センター

• 今野 雄介

  新日本製鐵(株)環境・プロセス研究開発センター

• 木野 敏治

  新日本製鐵(株)八幡製鐵所

• 廣渡 淳

  新日本製鐵(株)八幡製鐵所

書誌事項

タイトル別名

• Performance Enhancement of On-line Lamb Wave Inspection System Using SSP Technique
• SSP ニ ヨル バンハ タンショウ システム ノ コウセイノウカ

抄録

In order to improve the defect detectability of Lamb wave inspection system conventionally used for on-line detection of internal defects of steel strip, application of non-linear signal processing, SSP (split spectrum processing), to Lamb waves and the optimization of the SSP parameters were investigated. Sample strips with natural defects were used to evaluate the performance of SSP in this research. As a result, the improvement of the sensitivity of Lamb wave inspection was confirmed by optimum selection of SSP parameters (filter number 10, filter tap number 500, frequency range 2.1-2.4 MHz, algorithm : combination of minimization algorithm and polarity thresholding algorithm, S/N : about from 2 to 5 times improvement). Furthermore, real-time processing of SSP was realized. Consequently, the newly developed Lamb wave can perform SSP at a 500 Hz repetition rate that is sufficiently high repetition rate for the on-line Lamb wave inspection system.

収録刊行物

• 鉄と鋼

  鉄と鋼 90 (11), 890-896, 2004

  一般社団法人 日本鉄鋼協会

キーワード

• nondestructive evaluation
• ultrasonic testing
• Lamb wave
• signal processing
• grain noise

詳細情報

• CRID: 1390282680161444352
• NII論文ID: 110001457710
• NII書誌ID: AN00151251
• DOI: 10.2355/tetsutohagane1955.90.11_890
• ISSN: 18832954
• ISSN: 00211575
• NDL書誌ID: 7138997
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7138997
• Web Site: https://www.jstage.jst.go.jp/article/tetsutohagane1955/90/11/90_11_890/_pdf
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  • NDL
  • Crossref
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