Title :
Research on the device of differential excitation type eddy current testing for metal defect detection
Author :
Minghe Cao ; Weimin Zhang ; Weiqin Zeng ; Chengfeng Chen
Author_Institution :
Sch. of Mechatronical Eng., Beijing Inst. of Technol., Beijing, China
Abstract :
A differential excitation type sensor is introduced based on the eddy current principle for detecting metal defects, to improve the detection performance of the sensor system by optimizing the circuit of detection system. Using Q235 specimen as the detection object, aiming to detect and analyze the cracks of different depth and width and then to study the influence of excitation frequency, excitation amplitude and lift-off on the results. The test results showed that the differential excitation type eddy current testing device can be used for detecting defects on metal with high sensitivity.
Keywords :
crack detection; eddy current testing; mechanical variables measurement; Q235 specimen; cracks; detection circuit system; differential excitation-type eddy current testing; differential excitation-type sensor; excitation amplitude; excitation frequency; metal defect detection; Coils; Eddy current testing; Metals; Probes; Surface cracks; Surface impedance; Differential excitation; Eddy current; Metal defect; Phase sensitive detection;
Conference_Titel :
Nondestructive Evaluation/Testing: New Technology & Application (FENDT), 2013 Far East Forum on
Conference_Location :
Jinan
Print_ISBN :
978-1-4673-6018-0
DOI :
10.1109/FENDT.2013.6635547
