| 陈英瑜,李尚科,石宁波,张庆阳,张智新,李刚,杨中华,綦磊,肖庆生,芮小博.基于互相关时差法的核电安全壳泄漏定位方法研究[J].装备环境工程,2023,20(11):133-141. CHEN Ying-yu,LI Shang-ke,SHI Ning-bo,ZHANG Qing-yang,ZHANG Zhi-xin,LI Gang,YANG Zhong-hua,QI Lei,XIAO Qing-sheng,RUI Xiao-bo.Nuclear Power Containment Leakage Location Method Based on Cross correlation Time Difference Method[J].Equipment Environmental Engineering,2023,20(11):133-141. |
| 基于互相关时差法的核电安全壳泄漏定位方法研究 |
| Nuclear Power Containment Leakage Location Method Based on Cross correlation Time Difference Method |
| 投稿时间：2023-06-12 修订日期：2023-09-06 |
| DOI：10.7643/issn.1672-9242.2023.11.017 |
| 中文关键词: 声发射 安全壳 泄漏 互相关 离散系数 定位中图分类号:TM623 文献标识码:A 文章编号:1672-9242(2023)11-0133-09 |
| 英文关键词:acoustic emission containment leakage cross-correlation discrete coefficient location |
| 基金项目: |
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| Author | Institution |
| CHEN Ying-yu | China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, 518000, China |
| LI Shang-ke | China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, 518000, China |
| SHI Ning-bo | Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China |
| ZHANG Qing-yang | Tianjin University, Tianjin 300072, China |
| ZHANG Zhi-xin | Tianjin University, Tianjin 300072, China |
| LI Gang | China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, 518000, China |
| YANG Zhong-hua | China Nuclear Power Operations Co., Ltd., Guangdong Shenzhen, 518000, China |
| QI Lei | Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China |
| XIAO Qing-sheng | Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China |
| RUI Xiao-bo | Tianjin University, Tianjin 300072, China |
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| 中文摘要: |
| 目的 基于声发射检测原理，探究一种适用于核电安全壳的泄漏定位方法。方法 首先，开展安全壳结构的声波传播特性研究；其次，基于时频分析，对安全壳泄漏产生的声信号进行滤波预处理，基于分布式传感网络，利用互相关系数曲线，估计不同传感器信号时延；最后，采用双曲线法，对泄漏源进行定位，得到定位观测点，对观测点进行离散系数加权，得到预测泄漏源位置。结果 安全壳上波速平均值为3 026.2 m/s，泄漏声信号的频带主要集中在15~80 kHz，没有明显的时域特征。采用该方法对模拟安全壳上的泄漏源进行定位，平均定位误差为4.31 cm。结论 安全壳上周向和轴向的波速差异不大，可近似认为是各项同性的。基于离散系数加权的互相关时差法定位效果良好，满足安全壳结构泄漏定位需求。 |
| 英文摘要: |
| The work aims to explore a leak location method suitable for nuclear power containment based on the principle of acoustic emission detection. Firstly, the acoustic propagation characteristics of the containment structure were studied. Secondly, based on time–frequency analysis, the acoustic signals generated by the containment leakage were filtered. Based on the distributed sensor network, the time delay of different sensor signals was estimated with the cross-correlation coefficient curve. Finally, the hyperbola method was used to locate the leakage source to obtain the location observation point, and the discrete coefficient weighting was used to obtain the predicted leakage source location. The average wave velocity on the containment vessel was 3 026.2 m/s, and the frequency band of the leakage sound signal was mainly concentrated in the range of 15-80 kHz, without obvious time-domain characteristics. This method was used to locate the leakage source on the simulated containment vessel, the average location error was 4.31 cm. The difference in wave velocity between the circumferential and axial directions of the containment vessel is not significant, and can be approximated as isotropic. The cross correlation time difference method based on discrete coefficient weighting has good localization effect and meets the leakage localization requirements of the containment structure. |
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