Title :
Measurement sensitivity comparison between cylindrical and rectangular coils above conductive plates
Author :
Siquan Zhang ; Jiangfeng Tang ; Weihua Wu
Author_Institution :
Dept. of Electr. Autom., Shanghai Maritime Univ., Shanghai, China
Abstract :
Eddy current testing is an important non-destructive testing method in defect detection and material evaluation of conductor. In testing of multi-layer moving conductive plates, the excitation coil is cylindrical and parallel to the conductor, the cylindrical and rectangular coils are placed near the excitation coil serving as pick-up coil respectively. The accurate theoretical expressions of the induced voltage´ variation of the pick-up coils are derived, and the coils´ sensitivity in varied excitation frequency, conductor thickness and moving speed of conductor are compared, the results are verified with the method of FEM.
Keywords :
coils; conductors (electric); eddy current testing; finite element analysis; flaw detection; FEM; coil sensitivity; conductor thickness; cylindrical coil; defect detection; eddy current testing; excitation coil; excitation frequency; induced voltage variation; material evaluation; measurement sensitivity comparison; multilayer moving conductive plates; nondestructive testing method; pick-up coil; rectangular coil; Coils; Conductors; Eddy currents; Magnetic flux density; Sensitivity; Temperature measurement; Conductive plates; Cylindrical coil; Eddy current testing; Measurement sensitivity; Rectangular coil;
Conference_Titel :
Mechatronics and Automation (ICMA), 2015 IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7097-1
DOI :
10.1109/ICMA.2015.7237490
