2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 4. Mamalis Intl. Symp. / Advanced Manufacturing
| Editors: | F. Kongoli, A. G. Mamalis, K. Hokamoto |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 352 pages |
| ISBN: | 978-1-987820-88-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Giant Magneto-impedance Sensor for Steel Health Monitoring
Spyridon Angelopoulos1; Xenia Vourna1; Aphrodite Ktena2; Panagiotis Tsarabaris1; Evangelos Hristoforou1; Athanasios G. Mamalis3;1NATIONAL TU OF ATHENS, Athens, Greece; 2TEI OF CHALKIDA, Chalcis, Greece; 3PC-NAE, DEMOKRITOS NATIONAL CENTER FOR SCIENTIFIC RESEARCH, Athens, Greece;
Type of Paper: Regular
Id Paper: 297
Topic: 48
Abstract:
The measurement of surface magnetic permeability is a very useful non-destructive testing technique. A new sensor is described, providing a method for measuring surface magnetic permeability and residual stress. The development and use of this type of sensor eliminates the requirement of permanent magnets or coils in order to produce the magnetic field. On the contrary, the magnetic field is generated by a thin film current conductor, with a sensing element placed above. The sensing element, being an amorphous magnetic wire or ribbon, is affected by the principles of giant magneto-impedance. As a result, the output voltage of the sensing element, monotonically depends on the changes of the magnetic permeability of the ferromagnetic material, upon which the sensor is placed. Calibration of the sensor is mandatory, in order to provide accurate measurements. As a result, the changes of the magnetic permeability can be related with the residual stress tensor distribution on the surface of a ferromagnetic material under test. The advantages of this technique include high sensitivity, low uncertainty, high resolution, and high speed of measurements. The final results can be locally stored, or wirelessly transmitted to the preferred receiver. The sensor is easily manufactured, low cost, and is robust enough to be used in industrial environments.