| 杨理践,梁成壮,高松巍,刘 斌.管道漏磁内检测的管壁缺陷漏磁场解析模型[J].电子测量与仪器学报,2021,35(7):106-114 |
| 管道漏磁内检测的管壁缺陷漏磁场解析模型 |
| Analytical model of magnetic flux leakage field of pipe walldefects based on magnetic flux leakage internal detection |
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| DOI： |
| 中文关键词: 漏磁内检测 漏磁场模型 磁偶极子 管壁缺陷 缺陷解析模型 |
| 英文关键词:magnetic flux leakage detection leakage field model magnetic dipole tube wall defect defect analysis model |
| 基金项目:国家自然科学基金（61871450）项目资助 |
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| 摘要点击次数: 307 |
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| 中文摘要: |
| 漏磁内检测技术是长输油气管道缺陷检测的主要手段,缺陷几何特征识别对管道安全运行评价具有重要意义。 基于二
维磁偶极子模型,建立管道内壁缺陷漏磁场空间分布的三维解析模型,对磁化方向垂直缺陷时磁荷产生漏磁场的变化规律进行
研究;基于内壁解析模型,引入管壁退磁影响因子,对模型进行补偿,建立管道外壁缺陷漏磁场三维解析模型,得到了管道外壁
不同缺陷漏磁场的分布特征。 搭建漏磁检测实验平台,对所建模型有效性进行实验验证。 结果表明,管壁对外壁缺陷漏磁场具
有一定屏蔽作用,实验结果和理论分析具有很好的一致性,所建模型可有效描述管道内外壁缺陷漏磁场空间分布特性,对缺陷
识别和定量评估具有一定工程指导意义。 |
| 英文摘要: |
| Magnetic flux leakage internal detection technology is one of the means for detecting defects in long-distance oil and gas
pipelines. The identification of geometric features of defects is of great significance to the safety operation evaluation of pipeline. Based
on the two-dimensional magnetic dipole model, a three-dimensional analytical model of the spatial distribution of the magnetic flux
leakage field of the inner wall defects of the pipeline is established, and the variation law of the magnetic flux leakage field generated by
the magnetic charge when the magnetization direction is perpendicular to the defect is studied. Based on the analytical model of the inner
wall, a demagnetization factor is introduced to compensate the model. The three-dimensional analytical model of the defect leakage
magnetic field on the outer wall of the pipeline is established, and the distribution characteristics of the defect magnetic flux leakage field
on the outer wall of the pipeline are obtained. An experimental platform for magnetic flux leakage detection is built to verify the
effectiveness of the model. The results show that the magnetic flux leakage field of the outer wall has a certain shielding effect, and the
experimental results are in good agreement with the theoretical analysis. The model can effectively describe the spatial distribution
characteristics of the magnetic flux leakage field on the inner and outer walls of the pipeline, which has certain engineering guiding
significance for defect identification and quantitative evaluation. |
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