Affiliations: [a] School of Electromechanical Engineering, Beifang University of Nationalities, Yinchuan, Ningxia, China | [b] School of Chemistry and Chemical Engineering, Beifang University of Nationalities, Yinchuan, Ningxia, China | [c] State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Correspondence:
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Corresponding author: Dongli Zhang, School of Electromechanical Engineering, Beifang University of Nationalities, No. 204 Wenchang, North-Street, Xixia District, Yinchuan 750021, Ningxia, China. E-mail:zdlsir@nun.edu
Abstract: The thickness of anti-corrosive layer coated in the inner
surface of steel oil containers is very important to prevent the containers
from corrosion. To make the measurement accurate, some effective means are
needed, especially for the eddy current sensor inclining or deviating over
the curved inner surface of the containers. By using an electromagnetic
field simulation method with high accuracy, the distorted signals and the
measure precision of lift-off were analyzed. Then, some correction measures
were proposed according to the characteristics of testing signals due to the
sensor's inclination or deviation. Simulation results confirmed their
effectiveness for enhancing the measure precision. The conclusions can give
an effective theoretical guide to the centering and verticality controlling of
the sensor in practice.
