Location

Williamsburg, VA

Start Date

1-1-1986 12:00 AM

Description

An experimental determination of eddy current probe fields can be useful in several areas of nondestructive evaluation (NDE). In a very practical sense, a field map or profile is a good tool for examining the variations in probe performance. We show that probes of nominally identical construction can produce very different magnetic fields. Flaw inversion work in quantitative eddy current NDE requires an accurate knowledge of the near field produced by a probe. With the techniques developed in this experiment we have been able to map fields in considerable detail. We have done some experimental verification of theoretical models for fields produced by air core probes and mapped the fields of ferrite core probes which are difficult to calculate.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

5A

Chapter

Chapter 3: Sensors and Signal Processing

Section

Sensors

Pages

705-711

DOI

10.1007/978-1-4615-7763-8_73

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Mapping of Eddy Current Probe Fields

Williamsburg, VA

An experimental determination of eddy current probe fields can be useful in several areas of nondestructive evaluation (NDE). In a very practical sense, a field map or profile is a good tool for examining the variations in probe performance. We show that probes of nominally identical construction can produce very different magnetic fields. Flaw inversion work in quantitative eddy current NDE requires an accurate knowledge of the near field produced by a probe. With the techniques developed in this experiment we have been able to map fields in considerable detail. We have done some experimental verification of theoretical models for fields produced by air core probes and mapped the fields of ferrite core probes which are difficult to calculate.