The remote field eddy current testing technique features a deep depth of detection, high reliability of detection results, and many other advantages, which make it suitable for rapid detection of multi-layer metal riveting components. Aiming at the in-situ detection of hidden cracks along the rivet holes of aircraft riveting, the finite element model for the remote field eddy current detection of the hidden crack plane of multi-layer metal riveting members is established. The inner diameter of exciting coli, magnetic circuit structure, and shielding damping are simulated and optimized. The exciting coil and the detecting coil are combined with the shielding structure. The characteristics of hidden crack signals along the rivet holes of multi-layer metal riveting members are studied. The simulation and experimental results show that the tank shape of the magnetic core is 1.85 times that of the cylindrical of the magnetic core. The shield of the aluminum cover + copper cover can advance the remote field by 10 mm. When the detection coil is directly above the defect, the detected amplitude of the signal value and phase reach the maximum values. And the maximum value decreases with the increase of the buried depth of the defect. The research results are expected to be used to guide the engineering inspection practice of the multi-layer metal riveted components of the aircraft.
ZHAO Benyong
,
SONG Kai
,
NING Ning
,
HUANG Huabin
,
ZHANG Lipan
. Optimization and experimentation of remote field eddy current testing probe for hidden defects of aircraft riveting parts[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020
, 41(1)
: 423111
-423111
.
DOI: 10.7527/S1000-6893.2019.23111
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