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Development and comparison of spectral methods for passive acoustic anomaly detection in nuclear power plants

机译:核电站无源声异常检测的频谱方法的发展和比较

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摘要

We have developed spectral signal processing methods for passive acoustic anomaly detection in nuclear power plants. Furthermore, we compared the developed and existing methods by applying them to stationary sounds recorded in a controlled environment. Our new methods show significant improvement, in particular concerning robustness against false alarms. The results also demonstrate that clear detection of a given sound at a given signal-to-noise ratio is highly dependent on the distribution of characteristic frequency content in the spectrum in relation to the background noise and the spectral uncertainty. Since the frequency monitoring principle used here is quite rigid, we stress the need for research on more flexible methods, also taking into account differences between experiments and real reactor systems.
机译:我们已经开发了用于核电厂被动声异常检测的频谱信号处理方法。此外,我们通过将已开发和现有的方法应用于在受控环境中录制的固定声音中,从而比较了它们。我们的新方法显示出显着的改进,特别是在针对虚假警报的鲁棒性方面。结果还表明,以给定的信噪比对给定声音的清晰检测高度依赖于频谱中特征频率含量相对于背景噪声和频谱不确定性的分布。由于此处使用的频率监控原理非常严格,因此我们强调需要研究更灵活的方法,同时还要考虑到实验与实际反应堆系统之间的差异。

著录项

  • 来源
    《Applied Acoustics》 |2014年第9期|100-107|共8页
  • 作者单位

    KTH Royal Institute of Technology, Division of Nuclear Reactor Technology, AlbaNova University Center, 10691 Stockholm, Sweden;

    KTH Royal Institute of Technology, Division of Nuclear Reactor Technology, AlbaNova University Center, 10691 Stockholm, Sweden;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Acoustic anomaly detection; Sodium fast reactor; Signal processing;

    机译:声音异常检测;钠快堆;信号处理;

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