Decline in ambiguity of partially conductive cracks' depth evaluation from eddy current testing signals
Decline in ambiguity of partially conductive cracks' depth evaluation from eddy current testing signals
复制标题
涡流检测信号对部分导电裂纹深度评估的模糊性下降
DOI：
10.3233/jae-2012-1478
复制
发表时间：
2012
影响因子：
0.6
通讯作者：
M. Alman
中科院分区：
文献类型：
--
作者：
L. Janoušek;M. Smetana;M. Alman
本文涉及部分导电裂纹的涡流无损检测。使用数值模拟检查非导磁板样本。在板的中部模拟一条矩形裂纹。裂纹的尺寸参数和电导率在很大范围内变化，以模拟实际场景的多样性。一种新型涡流探头设计用于板材的近侧检测。探头的激励系统驱动板中的均匀涡流，并且用磁传感器感测扰动电磁场的所有三个空间分量。研究裂纹的部分传导性及其尺寸对扰动场分量的影响，以加强对真实部分传导性裂纹的评估。
The paper deals with eddy current non-destructive inspection of partially conductive cracks. A non-magnetic conductive plate specimen is examined using numerical simulations. A crack with the rectangular shape is modelled in the middle of plate. Dimensional parameters and the conductivity of the crack are varied in wide ranges to imitate diversity of practical scenarios. A new eddy current probe is designed for the near-side inspection of the plate. An exciting system of the probe drives uniform eddy currents in the plate and all the three spatial components of the perturbation electromagnetic field are sensed with a magnetic sensor. Influences of the crack's partial conductivity as well as its dimensions on the perturbation field's components are studied in order to enhance evaluation of real partially conductive cracks.