An Alarm Method for a Loose Parts Monitoring System
In order to reduce the false alarm rate and missed detection rate of a Loose Parts Monitoring System (LPMS) for Nuclear Power Plants, a new hybrid method combining Linear Predictive Coding (LPC) and Support Vector Machine (SVM) together to discriminate the loose part signal is proposed. The alarm pr...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.3233/SAV-2012-0672 |
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| _version_ | 1832560421601542144 |
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| author | Yanlong Cao Yuanfeng He Huawen Zheng Jiangxin Yang |
| author_facet | Yanlong Cao Yuanfeng He Huawen Zheng Jiangxin Yang |
| author_sort | Yanlong Cao |
| collection | DOAJ |
| description | In order to reduce the false alarm rate and missed detection rate of a Loose Parts Monitoring System (LPMS) for Nuclear Power Plants, a new hybrid method combining Linear Predictive Coding (LPC) and Support Vector Machine (SVM) together to discriminate the loose part signal is proposed. The alarm process is divided into two stages. The first stage is to detect the weak burst signal for reducing the missed detection rate. Signal is whitened to improve the SNR, and then the weak burst signal can be detected by checking the short-term Root Mean Square (RMS) of the whitened signal. The second stage is to identify the detected burst signal for reducing the false alarm rate. Taking the signal's LPC coefficients as its characteristics, SVM is then utilized to determine whether the signal is generated by the impact of a loose part. The experiment shows that whitening the signal in the first stage can detect a loose part burst signal even at very low SNR and thusly can significantly reduce the rate of missed detection. In the second alarm stage, the loose parts' burst signal can be distinguished from pulse disturbance by using SVM. Even when the SNR is −15 dB, the system can still achieve a 100% recognition rate |
| format | Article |
| id | doaj-art-e732d0c74e384be2958db426ebc003de |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-e732d0c74e384be2958db426ebc003de2025-02-03T01:27:38ZengWileyShock and Vibration1070-96221875-92032012-01-0119475376110.3233/SAV-2012-0672An Alarm Method for a Loose Parts Monitoring SystemYanlong Cao0Yuanfeng He1Huawen Zheng2Jiangxin Yang3Institute of Manufacturing Engineering, Zhejiang University, Hangzhou, Zhejiang, ChinaInstitute of Manufacturing Engineering, Zhejiang University, Hangzhou, Zhejiang, ChinaInstitute of Manufacturing Engineering, Zhejiang University, Hangzhou, Zhejiang, ChinaInstitute of Manufacturing Engineering, Zhejiang University, Hangzhou, Zhejiang, ChinaIn order to reduce the false alarm rate and missed detection rate of a Loose Parts Monitoring System (LPMS) for Nuclear Power Plants, a new hybrid method combining Linear Predictive Coding (LPC) and Support Vector Machine (SVM) together to discriminate the loose part signal is proposed. The alarm process is divided into two stages. The first stage is to detect the weak burst signal for reducing the missed detection rate. Signal is whitened to improve the SNR, and then the weak burst signal can be detected by checking the short-term Root Mean Square (RMS) of the whitened signal. The second stage is to identify the detected burst signal for reducing the false alarm rate. Taking the signal's LPC coefficients as its characteristics, SVM is then utilized to determine whether the signal is generated by the impact of a loose part. The experiment shows that whitening the signal in the first stage can detect a loose part burst signal even at very low SNR and thusly can significantly reduce the rate of missed detection. In the second alarm stage, the loose parts' burst signal can be distinguished from pulse disturbance by using SVM. Even when the SNR is −15 dB, the system can still achieve a 100% recognition ratehttp://dx.doi.org/10.3233/SAV-2012-0672 |
| spellingShingle | Yanlong Cao Yuanfeng He Huawen Zheng Jiangxin Yang An Alarm Method for a Loose Parts Monitoring System Shock and Vibration |
| title | An Alarm Method for a Loose Parts Monitoring System |
| title_full | An Alarm Method for a Loose Parts Monitoring System |
| title_fullStr | An Alarm Method for a Loose Parts Monitoring System |
| title_full_unstemmed | An Alarm Method for a Loose Parts Monitoring System |
| title_short | An Alarm Method for a Loose Parts Monitoring System |
| title_sort | alarm method for a loose parts monitoring system |
| url | http://dx.doi.org/10.3233/SAV-2012-0672 |
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