TO PROBLEM OF MAGNETIC NON-DESTRUCTIVE TESTING

V. Setnicka, J. Bajcsy, M. Kollar

Abstract

Many high quality Hall-type magnetic field sensors of advanced technology are customary available. We have experienced the use of Hall type sensors in non-destructive testing of material volume reduction due to corrosion and abrasion of iron tubes of different diameters as used for the heat exchangers, and gas pipelines.<BR />Some results achieved by using a prototype assembly are presented. This consisted of a mechanical sensor moving support and a PC based measurement set for data recording and processing. Data gained are interpreted from the diagnosis point of view as the loss of ferromagnetic material and/or the thickness reduction. A program enabling to calculate distorted magnetic field has been developed with the aim to improve the design of sensor and to provide the measuring system with a sort of built-in intelligence for the evaluation of tests results.

Keywords

non-destructive testing, Hall probe, magnetic field solution

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IMEKO-WC-2000-TC1-P024.pdf

DOI

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IMEKO TC

TC1 - Education and Training in Measurement and Instrumentation

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