基于磁传感器阵列的管道移位变形内检测
Pipeline displacement and deformation detection based on magnetic sensor array
李健 1刘天一 1王佳霖 1刘珊 2黄新敬1
作者信息
- 1. 天津大学精密测试技术及仪器全国重点实验室 天津 300072
- 2. 天津大学精密测试技术及仪器全国重点实验室 天津 300072;北华航天工业学院机电工程学院 廊坊 065000
- 折叠
摘要
海底管道的结构变形会增加管道断裂风险,从而造成极大的经济损失.本文提出一种基于球形内检测器和多通道磁传感器阵列的管道移位变形检测方法.根据磁机械效应,分析管道移位变形导致的管壁应力及管道内磁通密度变化规律.设计了检测器结构布局及磁阵列采集方案,实现了管道内空间旋转磁通密度的高覆盖率采样.设计算法将旋转磁信号转换为管道坐标系下的平动磁信号,提取管道内等高线的磁数据,实现了多通道磁信息融合,提高了磁异常检出率.最后,开展了管道竖向加载和等效横向加载等移位变形的内检测试验.结果表明,管道在纵向受力变形状态下,管道内等高线上磁通密度纵向分量的离散度降低 136.1 μT;管道在等效横向受力变形状态下,管道内等高线上磁通密度横向分量的离散度降低 123.1 μT;球形内检测器所测得的磁通密度离散度能够反映出管道不同方向的移位变形,且管道变形越大,磁通密度离散度越小.
Abstract
The structural deformation of subsea pipelines increases the risk of pipeline fracture,which can cause significant economic losses.This paper proposes a pipeline displacement and deformation detection method based on a spherical inner detector equipped with a multi-channel magnetic sensor array.The stress in the pipe wall and the change of the magnetic flux density inside the pipeline caused by the displacement deformation of the pipeline are analyzed according to the magneto-mechanical effect.The structure layout of the detector and the magnetic signal acquisition scheme are designed.The collection of spatial rotational magnetic flux density information inside the pipeline is realized,and the rotational magnetic signal is converted into translational magnetic signal in the pipeline coordinate system.By extracting the magnetic data on the contour lines inside the pipeline,multiple channels of signals are integrated to increase the space sampling coverage of the magnetic signal inside the pipeline.Finally,internal inspection tests were conducted on pipeline vertical and equivalent lateral loading-induced displacement deformation.The results showed that under longitudinal force deformation state,the magnetic flux density longitudinal component dispersion decreased by 136.1 μT on the contour line inside the pipeline;under equivalent lateral force deformation state,the magnetic flux density lateral component dispersion decreased by 123.1 μT on the contour line inside the pipeline.The magnetic flux density dispersion measured by the spherical internal detector can reflect the displacement deformation of the pipeline in different directions,and the larger the deformation of the pipeline,the smaller the magnetic flux density dispersion.
关键词
管道弯曲/管道内磁通密度/磁阵列/球形内检测器Key words
pipeline bending/internal magnetic field of the pipeline/magnetic array/spherical inner detector引用本文复制引用
基金项目
国家自然科学基金(62073233)
天津市自然科学基金(21JCQNJC00690)
河北省教育厅高等学校科研项目(QN2020179)
河北省教育厅高等学校科研项目(ZC2021004)
出版年
2024
NETL
NSTL
万方数据