Location

San Diego, CA

Start Date

1-1-1985 12:00 AM

Description

The electric current perturbation (ECP) probe1–3 is similar to a conventional eddy current probe in that a coil, typically a cylindrical winding, is used to induce current in the test piece. The ECP probe differs in the use of a separate differential sensor coil, with axis parallel to the surface of the piece, and usually located just outside the induction coil winding. We have found that this sensor orientation tends to minimize probe-to-surface coupling and therefore minimizes liftoff noise.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

4A

Chapter

Chapter 2: Eddy Currents

Section

Probes and Instruments

Pages

421-428

DOI

10.1007/978-1-4615-9421-5_47

Language

en

File Format

Application/pdf

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Jan 1st, 12:00 AM

Frequency Dependence of Electric Current Perturbation Probe Response

San Diego, CA

The electric current perturbation (ECP) probe1–3 is similar to a conventional eddy current probe in that a coil, typically a cylindrical winding, is used to induce current in the test piece. The ECP probe differs in the use of a separate differential sensor coil, with axis parallel to the surface of the piece, and usually located just outside the induction coil winding. We have found that this sensor orientation tends to minimize probe-to-surface coupling and therefore minimizes liftoff noise.