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

fYear

2013

Firstpage

155

Lastpage

158

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nondestructive Evaluation/Testing: New Technology & Application (FENDT), 2013 Far East Forum on

Conference_Location

Jinan

Print_ISBN

978-1-4673-6018-0

Type

conf

DOI

10.1109/FENDT.2013.6635547

Filename

6635547