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管道漏磁内检测缺陷量化特征参数分析
Analysis of Quantitative Characteristic Parameters of Pipeline Magnetic Flux Leakage Internal Defects
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- DOI:
- 作者:
- 庄惠敏，刘玉琢，杨志军，业 成，孙 晗
Zhuang Huimin, Liu Yuzhuo, Yang Zhijun, Ye Cheng, Sun Han
- 作者单位:
- 南京市锅炉压力容器检验研究院\江苏省市场监管重点实验室（油气管道检验评价与安全保障技术）
Nanjing Boiler and Pressure Vessel Inspection Research Institute (Key Laboratory of the Oil & Gas Pipeline Inspection and Safety Technology for Jiangsu Province Market Regulation)
- 关键词:
- 内检测；漏磁检测；信号分析；管道检测
internal inspection; magnetic flux leakage testing; signal analysis; pipeline inspection
- 摘要:
- 针对长输管道漏磁内检测缺陷漏磁量化结果与实际缺陷尺寸偏差大问题，建立缺陷漏磁场有限元仿真模型；提取缺陷漏磁场径向、轴向和周向磁通量密度分量信号；分析缺陷尺寸与缺陷漏磁场径向、轴向和周向磁通量密度影响规律，选择缺陷长度、宽度和深度的量化特征参数。结果表明，漏磁信号径向磁通量密度曲线峰谷间距可优先作为缺陷长度尺寸的量化特征参数，周向磁通量密度曲线峰谷间距可优先作为宽度尺寸的量化特征参数，径向磁通量密度曲线峰谷值差可优先作为缺陷深度尺寸的量化特征参数。To address the issue of large deviations between the magnetic flux leakage (MFL) quantification results from internal in⁃spection of long-distance pipelines and the actual defect sizes, a finite element simulation model for defect MFL was established.Radial, axial, and circumferential components of the defect MFL flux density signals were extracted, and the influence of defect sizeon the radial, axial, and circumferential MFL flux densities was analyzed to select quantitative feature parameters for defect length,width, and depth. The results show that the peak-to-valley spacing of the radial flux density curve in the MFL signal can be prefer⁃entially used as the quantitative feature parameter for defect length, the peak-to-valley spacing of the circumferential flux densitycurve can be preferentially used for width, and the peak-to-valley difference of the radial flux density curve can be preferentiallyused for defect depth.