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Linearizing the output characteristic of GMR current sensors through hysteresis modeling / Jedlicska, Istvan in IEEE transactions on industrial electronics, Vol. 57 N° 5 (Mai 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1728 - 1734 Titre : Linearizing the output characteristic of GMR current sensors through hysteresis modeling Type de document : texte imprimé Auteurs : Jedlicska, Istvan, Auteur ; Weiss, Roland, Auteur ; Weigel, Robert, Auteur Année de publication : 2011 Article en page(s) : pp. 1728 - 1734 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Giant  magnetoresistive  (GMR)  Hysteresis  Linearization  Mathematical  model  Signal  conditionning Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a new method for increasing the measurement accuracy of giant magnetoresistive (GMR) sensors. The method used is to linearize the output characteristic by numerically eliminating the hysteresis-the main error source. A simplified mathematical model of the hysteresis is derived from the T(x) model and tested in a software simulation environment by comparing the results with the real measurements. The model is then discretized and implemented on a fixed-point digital signal processor (DSP). An algorithm based on the model is developed in order to eliminate error propagation during the measurements. The 75% improvement in accuracy and the linear output characteristic delivered by the DSP verify the validity of the proposed method. The successful final results demonstrate that modeling hysteresis is a convenient and very effective way to increase the accuracy and the measurement range of GMR sensors in practical applications. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280195 [article] Linearizing the output characteristic of GMR current sensors through hysteresis modeling [texte imprimé] / Jedlicska, Istvan, Auteur ; Weiss, Roland, Auteur ; Weigel, Robert, Auteur . - 2011 . - pp. 1728 - 1734. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1728 - 1734 Mots-clés : Giant  magnetoresistive  (GMR)  Hysteresis  Linearization  Mathematical  model  Signal  conditionning Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper presents a new method for increasing the measurement accuracy of giant magnetoresistive (GMR) sensors. The method used is to linearize the output characteristic by numerically eliminating the hysteresis-the main error source. A simplified mathematical model of the hysteresis is derived from the T(x) model and tested in a software simulation environment by comparing the results with the real measurements. The model is then discretized and implemented on a fixed-point digital signal processor (DSP). An algorithm based on the model is developed in order to eliminate error propagation during the measurements. The 75% improvement in accuracy and the linear output characteristic delivered by the DSP verify the validity of the proposed method. The successful final results demonstrate that modeling hysteresis is a convenient and very effective way to increase the accuracy and the measurement range of GMR sensors in practical applications. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5280195