被测物场空间分布对电磁测量系统相位检测的影响分析  

Effect of Space Distribution in Phase Detection on Magnetic Induction Measurement System

作　　者：付妍[1] 董峰[1] 谭超[1] 

机构地区：[1]天津市过程检测与控制重点实验室(天津大学),天津市南开区300072

出　　处：《中国电机工程学报》2014年第20期3362-3368,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51176141;61227006);天津市应用基础及前沿技术研究计划重点项目(11JCZDJC22500)~~

摘　　要：电磁层析成像技术在过程检测中因其低成本与非侵入性而具有广泛的潜在应用价值。研究显示,相位测量的精确度与成像质量具有密切联系。为了深入了解与相位测量相关的制约因素,进而优化测量系统,提高系统敏感性和测量精度,提高成像质量,利用有限元仿真软件(COMSOL Multiphysics)对电磁层析成像系统的空间分布相位测量影响进行仿真分析,包括改变物场内电性参数分布以及改变物体自身空间位置,且对仿真结果进行实验验证,对电磁层析成像测量系统工作状态下场的分布情况及状态给予估计,为图像重建的优化使用提供参考。The magnetic induction tomography（MIT） has a great potential value in process measurements because of its low cost and non-invasive. It has been reported that the accuracy of phase detection is sensitive with the quality of the reconstruction image. It is significant to understand the constraints close to the phase detection and to optimize the measurement system. In order to promote the sensitivity of the system, accuracy in measurement and quality of reconstruction image, the finite element simulation software, COMSOL Multiphysics, was used to analyze effects in phase detection caused by space distribution, which includes electrical parameter distribution in the object field and target position in the object space. The simulation results were verified by practical experiments and the status and sensing field distribution of MIT in operative condition was estimated. The foundation in image reconstruction optimization was established.

关 键 词：电磁层析成像技术 电磁测量 相位检测 敏感场分布 电导率 

分 类 号：TM930.12[电气工程—电力电子与电力传动]