Dual Core Differential Pulsed Eddy Current Probe to Detect the Wall Thickness Variation in an Insulated Stainless Steel Pipe
Dual Core Differential Pulsed Eddy Current Probe to Detect the Wall Thickness Variation in an Insulated Stainless Steel Pipe
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双芯差分脉冲涡流探头检测绝缘不锈钢管的壁厚变化
DOI：
10.4283/jmag.2010.15.4.204
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Y. Cheong
中科院分区：
文献类型：
--
作者：
C. Angani;D. Park;Chong‐Oh Kim;P. Kollu;Y. Cheong
管道局部壁变薄会影响核电站 (NPP) 等行业的结构完整性。在本研究中，制造了带有两个励磁线圈和两个霍尔传感器的脉冲涡流（PEC）差分探头来测量绝缘管道的壁厚减薄情况。 A stainless steel test sample was prepared with a thickness that varied from 1 ㎜ to 5 ㎜ and was laminated by plastic insulation to simulate the pipelines in NPPs.探头中的励磁线圈由矩形电流脉冲驱动，两个霍尔传感器的信号差被测量为最终的 PEC 信号。检测到的信号的峰值用于描述壁变薄。峰值随着测试样品厚度的增加而增加。结果是在样品的不同绝缘厚度下测量的。结果表明，差分 PEC 探头有潜力检测绝缘核电站管道的壁厚减薄情况。
Local wall thinning in pipelines affects the structural integrity of industries like nuclear power plants (NPPs). In the present study, a pulsed eddy current (PEC) differential probe with two excitation coils and two Hall-sensors was fabricated to measure the wall thinning in insulated pipelines. A stainless steel test sample was prepared with a thickness that varied from 1 ㎜ to 5 ㎜ and was laminated by plastic insulation to simulate the pipelines in NPPs. The excitation coils in the probe were driven by a rectangular current pulse, the difference of signals from two Hall-sensors was measured as the resultant PEC signal. The peak value of the detected signal is used to describe the wall thinning. The peak value increased as the thickness of the test sample increased. The results were measured at different insulation thicknesses on the sample. Results show that the differential PEC probe has the potential to detect wall thinning in an insulated NPP pipelines.