激光与光电子学进展, 2018, 55 (4): 040607, 网络出版: 2018-09-11
输水管道预警与泄漏定位中Φ-OTDR技术信号处理法 下载: 1202次
Signal Processing Method of Φ-OTDR Technology in Early Warning and Leakage Positioning of Water Pipelines
图 & 表
图 1. Φ-OTDR的分布式振动检测系统原理框图
Fig. 1. Schematic diagram of distributed vibration sensing system based on Φ-OTDR
图 2. 基于Φ-OTDR技术的管道泄漏定位与预警测试系统原理图
Fig. 2. Schematic diagram of the pipeline leak positioning and early warning system based on Φ-OTDR
图 3. 原始时域信号图。(a) 426处原始时域信号图;(b) 970处原始时域信号图
Fig. 3. Original time domain signals at positions (a) 426 and (b) 970
图 4. 原始功率谱图。(a) 429处原始功率谱图;(b) 970处原始功率谱图
Fig. 4. Power spectra of original time domain signals at positions (a) 429 and (b) 970
图 5. 近似熵图。(a) 429处近似熵图;(b) 970处近似熵图
Fig. 5. Approximate entropy distributions at positions (a) 429 and (b) 970
图 6. 信息熵图。(a) 429处信息熵图;(b) 970处信息熵图
Fig. 6. Information entropy distributions at positions (a) 429 and (b) 970
图 7. 空频能量分布图。(a)空频能量整体分布图;(b)空频能量局部分布图
Fig. 7. (a) Spatial frequency energy distribution; (b) spatial frequency energy distribution (in detail)
图 8. 高通滤波后信号图。(a) 429处滤波后信号图;(b) 970处滤波后信号图
Fig. 8. High-pass filtered signals at (a) 429 and (b) 970
图 9. 空频能量分布的振动事件定位原理图
Fig. 9. Schematic diagram of the vibration location technique based on spatial-frequency energy distribution
图 10. 土中敲击空频能量分布图。(a)空频能量整体分布图;(b)空频能量局部分布图
Fig. 10. (a) Spatial frequency energy distribution of in-soil knocking; (b) spatial frequency energy distribution of in-soil knocking (in detail)
图 11. 水中敲击空频能量分布图。(a)水中敲击空频能量整体分布图; (b)水中敲击空频能量局部分布图
Fig. 11. (a) Spatial frequency energy distribution of in-water knocking; (b) spatial frequency energy distribution of in-water knocking (in detail)
表 1敲击与泄漏点位置测试结果
Table1. Test results of knock and leak location
|
杨洋, 沙洲, 封皓, 贾志宁, 杨洋, 王冠群. 输水管道预警与泄漏定位中Φ-OTDR技术信号处理法[J]. 激光与光电子学进展, 2018, 55(4): 040607. Yang Yang, Zhou Sha, Hao Feng, Zhining Jia, Yang Yang, Guanqun Wang. Signal Processing Method of Φ-OTDR Technology in Early Warning and Leakage Positioning of Water Pipelines[J]. Laser & Optoelectronics Progress, 2018, 55(4): 040607.