Lift-off variation causes errors in eddy current measurement of nonmagnetic plates as well
as magnetic plates. For nonmagnetic plates, previous work has been carried out to address …

Lift-off variation causes errors in the eddy current thickness measurements of metallic plates.
In this paper, we have developed an algorithm that can compensate for this variation and …

Lift-off variation causes errors in eddy-current measurement of metallic plate thickness. In
this paper, we designed a triple-coil sensor operating as two coil pairs and in a …

Alternating current field measurement (ACFM) technique is an emerging non-destructive
testing method for detecting cracks in conductive material. However, the existence of lift-off …

A single-axis alternating current field measurement (ACFM) detection system is proposed for
crack size estimation. A single tunneling magneto-resistive (TMR) sensor is used to detect B …

Lift-offs of the sensor could significantly affect the measurement signal and reconstruction of
material properties when using the electromagnetic (inductive) eddy current (EC) sensor …

In the eddy current testing, the impedance tested by the sensor is influenced by the lift-off
between the sensor and the sample plate. Consequently, the thickness inferred from the …

Pipe string is highly susceptible to cracks caused by stress corrosion and fatigue damage in
petroleum industry. The performance of existing magnetic flux leakage and magnetic particle …

Non-contact inspection is the main advantage of the alternating current field measurement
(ACFM). The lift-off effect lowers the mutual-inductance between the ACFM probe and the …

This paper proposes a linear eddy-current feature to determine the radius of a metallic ball
in a non-contact manner. An electromagnetic eddy-current sensor with two coils is placed co …