Bridge the gap of theoretical and experimental eddy current NDT

哈德斯菲尔德在涡流无损检测和检测，特别是脉冲涡流和信号处理的实验方法方面有着出色的研究记录。Theodoulidis博士在分析涡流模型方面有非常好的研究记录，并发表了著名的论文。目前，涡流无损检测(ECT)的理论和实验之间还存在一定的差距。例如，ECT的分析模型集中于计算线圈阻抗随缺陷的变化；相比之下，大多数ECT的实验研究都是研究磁场随缺陷的分布。许多反演模型都是通过实验或数值模型来研究的，这是非常昂贵的。建议的访问奖学金是为了让Theodoulidis博士(西马其顿大学)能够在哈德斯菲尔德大学由田教授领导的系统工程研究小组工作。我们建议将截断区域特征函数展开(TREE)技术集成到我们现有的广泛的数值电磁模拟实验研究中，包括脉冲涡流、微磁传感器阵列、应力映射以及在搅拌摩擦焊和复杂多层结构中的疲劳裂纹检测方面的应用。

Huddersfield has an excellent research record on eddy current NDT&E, particularly pulsed eddy current and signal processing using experimental methods. Dr Theodoulidis has very good research records on analytical eddy current models and notable publication. Currently, there are gaps between theoretical and experimental eddy current NDT (ECT). For examples, analytical models of ECT concentrate on computation on coil impedance variation vs defects; in contrast, most experimental study of ECT investigates the magnetic field distribution vs defects. Many inverse models are investigated by experiments or numerical models, which is very costly. The proposed Visiting Fellowship is to enable Dr Theodoulidis (University of West Macedonia) to work in the Systems Engineering Research Group led by Professor Tian at Huddersfield. We propose to integrate the Truncated Region Eigenfunction Expansion (TREE) techniques into a wide range of our existing numerical electromagnetic simulation experimental studies on pulsed eddy current, micro magnetic sensor array, stress mapping and applications on stirring friction welds and detection of fatigue cracks in complex, multilayered structure.