書誌事項
- タイトル別名
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- Development of an AE Monitoring System in a Noisy Environment Using Spectral Subtraction
- スペクトルサブトラクション オ モチイタ ノイズ カンキョウ カ デ ノ AE ケイソク システム ノ カイハツ
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An acoustic emission (AE) monitoring system with real time noise reduction function using a spectral subtraction (SS) process was developed, in order to monitor AE in a noisy environment. To evaluate the noise reduction performance of the SS, we monitored artificial AE signals in various noise environments. The S/N ratio of the AE signal in background noise, which includes electrical noise of a pre-amp and/or an A/D converter, was improved by 18.4dB using the SS process. Periodic noise was reduced and the S/N ratio increased to 40dB. We also reduced the noise with wide frequency band and the S/N ratio increased by 8-10dB. We then monitored the cylinder wave AE signals produced by a pencil lead breaking in the noise generated by the air flow in the pipe. The system improved the S/N ratio of the AE signal by 9.2dB and was able to detect AE signals.
収録刊行物
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- 非破壊検査
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非破壊検査 58 (12), 549-555, 2009
一般社団法人 日本非破壊検査協会
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詳細情報 詳細情報について
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- CRID
- 1390282681470178688
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- NII論文ID
- 10026320046
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- NII書誌ID
- AN00208370
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- NDL書誌ID
- 10517135
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- ISSN
- 03675866
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可