NDLI: A compensated magnetic probe for steel fiber reinforced concrete monitoring

Content Provider	IEEE Xplore Digital Library
Author	Faifer, M. Ottoboni, R. Toscani, S.
Copyright Year	2010
Description	Author affiliation: Dipartimento di Elettrotecnica, Politecnico di Milano, Piazza Leonardo da Vinci 32 - 20133 ITALY (Faifer, M.; Ottoboni, R.; Toscani, S.)
Abstract	SFRC, steel fiber reinforced concrete, is a widely employed material in building construction. The fibers assure a better mechanical behavior with respect to plain concrete. Testing the material “on the site” represents a very important goal. In particular, there is a strong need to have a reliable measurement method available which allows assessing information about size, orientation and concentration of the fibers. Currently, the measurement techniques present some important restrictions (laboratory applications only, sensitivity to the humidity, complexity, cost etc). This paper presents a new approach, based on a simple, low-cost sensor employing a C-shaped ferrite core. Four coils have been wound on it: two provides the generation of the magnetic flux and two allow picking up the emf. By leaning the probe on the SFRC surface and by measuring the variation of the mutual inductance between the two pairs of winding, it is possible to discriminate the average orientation of the fibers, and to obtain information about their concentration. It has also been proven that the size and the geometrical properties of the fibers result in a variation of the power losses.
Starting Page	698
Ending Page	703
File Size	1031403
Page Count	6
File Format	PDF
ISBN	9781424481705
ISSN	19300395
e-ISBN	9781424481699
e-ISBN	9781424481682
DOI	10.1109/ICSENS.2010.5690066
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Probes Optical fiber sensors Windings Inductance Magnetic cores Magnetic flux Steel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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