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Proceedings Paper

Imaging Using Eddy Current Sensors
Author(s): Henri Clergeot; Dominique Placko; Francois Monteil
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Paper Abstract

An original imaging system using eddy current sensors is being presented. The linear disposition used gives the picture of the profile of a metallic surface in front of the sensor , the main application being weld guidance systems. Each sensor in this linear structure gives a measure of the distance of the metallic surface in front. Individual sensors and signal acquisition use an original design intended to achieve maximum directivity and dynamic range, and insensitivity to the conductivity of the metal and to electromagnetic interferences. Simultaneous, in phase, excitation of all the sensors turns out to give an improved spatial resolution. The signals from individual sensors are multiplexed, digitalized and used to address a preregistred linearisation memory in order to obtain a first raw image of the profile. To improve this image a digital treatment is used which achieves non linear deconvolution, and interpolation between the observation points.

Paper Details

Date Published: 16 February 1984
PDF: 8 pages
Proc. SPIE 0449, Intelligent Robots: 3rd Intl Conf on Robot Vision and Sensory Controls, (16 February 1984); doi: 10.1117/12.939223
Show Author Affiliations
Henri Clergeot, Ecole Normale Superieure de l'Enseignement Technique (France)
Dominique Placko, Ecole Normale Superieure de l'Enseignement Technique (France)
Francois Monteil, Ecole Normale Superieure de l'Enseignement Technique (France)


Published in SPIE Proceedings Vol. 0449:
Intelligent Robots: 3rd Intl Conf on Robot Vision and Sensory Controls
David P. Casasent; Ernest L. Hall, Editor(s)

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