| 引用本文: | 张建利,郭卫星.三传感器约束多尺度相关管道漏点定位方法[J].哈尔滨工业大学学报,2012,44(6):37.DOI:10.11918/j.issn.0367-6234.2012.06.009 |
| ZHANG Jian-li,GUO Wei-xing.A new method of leak localization with three sensors based on multi-scale analysis[J].Journal of Harbin Institute of Technology,2012,44(6):37.DOI:10.11918/j.issn.0367-6234.2012.06.009 |
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| 摘要: |
| 为了改善传统相关法漏点定位可靠性差,定位结果不能及时验证的问题,提出一种基于三传感器相互约束多尺度相关的漏点定位方法．该方法增设了第3个传感器组成三传感器模型,然后通过对3路传感器信号进行多尺度分解,从而在各子频率带内计算时延量,根据三传感器间的匹配关系筛选最优结果,最后根据经验决定结果的可信度．结果表明:该方法不仅能够实现速度的自行求取,而且使漏点定位质量有了较大的提高．同时说明通过小波多尺度分解能够实现信噪分离,三传感器匹配关系可以用于漏点定位结果的甄别． |
| 关键词: 漏点定位 时延估计 多尺度分析 三传感器 |
| DOI：10.11918/j.issn.0367-6234.2012.06.009 |
| 分类号:TE8329 |
| 基金项目:国家“十一五”科技支撑计划重大项目(2006BAJ16B03) |
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| A new method of leak localization with three sensors based on multi-scale analysis |
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ZHANG Jian-li, GUO Wei-xing
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School of Municipal and Environmental Engineering, Harbin Institute of Technology,150090 Harbin, China
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| Abstract: |
| To improve the reliability and accuracy of the leak localization with traditional correlator, and to make the result be verified timely, a new method of leak localization with three sensors based on multi-scale analysis is proposed. The third sensor was added to form a three sensors model in this method, and then the correlation value for time delay was calculated in every sub-band through multi-scale decomposition for signals from three sensors. According to the matching relation among these three sensors, the optimal results could be obtained which showed that this method could not only calculate speed by itself but also make the leak localization more precise. |
| Key words: leak localization time delay estimate multi-scale analysis three sensors |
