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Title: A geometric magnetic and discriminator sensor for smart pigs
Category: Pigsource Papers
Downloadable: Yes 
Catalog No.: pg3406
Date of Publication: Feb 1 2004 12:00AM
Price: $25.00 US
Authors: Vinicius de C Lima, Jean Pierre von der Weid, José A P da Silva, Claudio Soligo Camerini, and Carlos H F de Oliveira
Abstract: A result of a research partnership between Catholic University of Rio de Janeiro – PUCRio, Petrobras, and PipeWay is presented: The development of an innovative sensor head for high resolution MFL pigs, the GMD sensor, Geometric Magnetic and Discriminator. This head makes high resolution magnetic pipeline readings using the MFL (magnetic flux leakage) technique, with the addition of geometric readings and the outside/inside defects discriminations. This technique makes possible, with only one crown of GMD sensors, the caliper, metal loss and outside/inside discrimination pipeline inspection. Technical aspects of the development, e.g.the construction details of the sensor, evaluation tests and laborator results, are also presented.
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