文章摘要
侯森,胡长青.海洋中持续泄漏气泡的声学检测[J].声学技术,2020,39(6):669~675
海洋中持续泄漏气泡的声学检测
Acoustic detection of continued leaking bubbles in the ocean
投稿时间:2020-06-11  修订日期:2020-07-15
DOI:10.16300/j.cnki.1000-3630.2020.06.003
中文关键词: 气体泄漏  检测方法  频域积累  时频分析
英文关键词: underwater gas leak  detection method  frequency domain  time-frequency analysis accumulation
基金项目:国家自然科学基金(11674353)资助项目。
作者单位E-mail
侯森 中国科学院声学研究所东海研究站, 上海 201815
中国科学院大学, 北京 100049 
 
胡长青 中国科学院声学研究所东海研究站, 上海 201815 hchq@mail.ioa.ac.cn 
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中文摘要:
      声学方法是检测水面下气体泄漏的主要方法。由于气泡振荡产生的声信号能量较弱,且频段往往与环境噪声频段重叠,不易提取和分析。针对这个问题,提出了一种结合频域积累与时频能量检测的处理方法,通过频域积累提高信噪比后,利用一种自适应时频检测算法分析气泡声信号特性。海上实验表明,该方法可以在较强环境噪声下对持续泄漏的气泡进行有效检测。
英文摘要:
      Acoustic method is the main method to detect gas leakage under water surface. It is difficult to extract and analyze the bubble acoustic signals when the leakage flow is small, because the ambient noise is strong and its frequency band overlaps with bubble sound. To solve this problem, an algorithm combining frequency domain accumulation and time-frequency detection is proposed in this paper. After increasing the signal-to-noise ratio by frequency domain accumulation, an adaptive time-frequency detection algorithm is used to extract and analyze periodic bubble acoustic signals. Experiments on the sea show that the method in this paper can effectively detect continuous leaking bubbles under strong environmental noise.
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