A review of the alternating current field measurement inspection technique

Author:

Raine Alan,Lugg Martin

Abstract

This paper describes the principles of the a.c. field measurement technique, a non‐contacting electromagnetic method of crack detection and sizing in metals. The development of the technique is covered, followed by examples of some of the many different applications the technique has been used for, including multi‐sensor arrays for rapid manual inspection or for deployment by robotic manipulator in hazardous environments. Finally, recent work on replacing the normal multi‐turn coil magnetic field sensors with newly available GMR sensors is discussed.

Publisher

Emerald

Subject

Electrical and Electronic Engineering,Industrial and Manufacturing Engineering

Reference10 articles.

1. Collins, R. and Lugg, M.C. (1991), “Use of A.C. field measurements for non‐destructive testing”, in Marsh, K.J. (Ed.), Fatigue Crack Measurement: Techniques and Applications, Engineering Materials Advisory Service, Warley, W. Midlands, pp. 39‐67.

2. Hughes, G. and Gittleman, M. (1995), “A robotic end effector for visual and electromagnetic inspection of waste storage tanks walls”, presented at American Nuclear Society 6th Topical Meeting on Robotic and Remote Systems, Monterey, CA, February.

3. Lugg, M.C. (1990), “Rapid scanning with non‐contacting ACFM array probes”, in Thompson, D.O. and Chimenti, D.E. (Eds), Review of Progress in Quantitative NDE, 10A, Plenum, New York, NY, pp. 1003‐10.

4. Lugg, M.C. and Raine, A. (1998), “Inspection of titanium tubular sections with the ACFM technique”, presented at Annual Conference of the British Institute of Non‐destructive Testing, Newcastle, September.

5. Raine, A. (1997), “The application of the ACFM technique for public safety applications”, presented at ASNT Spring Conference, Houston, TX, March.

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