Eddy Current Pulsed Thermography with Different Excitation Configurations for Metallic Material and Defect Characterization.
Eddy Current Pulsed Thermography with Different Excitation Configurations for Metallic Material and Defect Characterization.
复制标题
用于金属材料和缺陷表征的不同激励配置的涡流脉冲热成像
DOI：
10.3390/s16060843
复制
发表时间：
2016-06-08
期刊：
影响因子：
--
通讯作者：
He Y
中科院分区：
文献类型：
--
作者：
Tian GY;Gao Y;Li K;Wang Y;Gao B;He Y
本文综述了涡流脉冲热像仪(ECPT)在材料表征和无损检测(NDE)中的研究进展。由于线圈式ECPT存在加热不均匀、视角受限等缺陷，不适合复杂的几何结构分析，提出了基于亥姆霍兹线圈和铁氧体线圈的ECPT励磁方案，并对其进行了比较。针对铁磁和非铁磁材料，进行了考虑磁滞损耗、杂散损耗、涡流加热和均匀感应磁场等多种物理现象的新型ECPT结构的仿真和实验。讨论了用于金属材料的ECPT的这些配置和缺陷表征，并与传统的线-线圈配置进行了比较。结果表明，所提出的ECPT励磁配置可以适用于不同形状的试件，如涡轮叶片边缘和轨道。
This paper reviews recent developments of eddy current pulsed thermography (ECPT) for material characterization and nondestructive evaluation (NDE). Due to the fact that line-coil-based ECPT, with the limitation of non-uniform heating and a restricted view, is not suitable for complex geometry structures evaluation, Helmholtz coils and ferrite-yoke-based excitation configurations of ECPT are proposed and compared. Simulations and experiments of new ECPT configurations considering the multi-physical-phenomenon of hysteresis losses, stray losses, and eddy current heating in conjunction with uniform induction magnetic field have been conducted and implemented for ferromagnetic and non-ferromagnetic materials. These configurations of ECPT for metallic material and defect characterization are discussed and compared with conventional line-coil configuration. The results indicate that the proposed ECPT excitation configurations can be applied for different shapes of samples such as turbine blade edges and rail tracks.