Magnetic field sensor

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United States of America Patent

PATENT NO 9593966
APP PUB NO 20150008915A1
SERIAL NO

14371484

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Abstract

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A sensor of magnetic fields along a direction of measurement comprising N magneto-resistive transducers TMi, a resistance of each transducer TMi varying linearly to within ±xi% as a function of an intensity of a magnetic field to be measured within a maximum range [ai; bi] of intensity of the magnetic field to be measured and non-linearly outside of this range, the index i being an identifier of the transducer TMi. The sensor further comprises a generator which generates N magnetic fields CMi using at least one permanent magnet, where each magnetic field CMi exhibits an intensity Ii in the direction of measurement. The intensity Ii being constant and independent of the intensity of the magnetic field to be measured and each transducer TMi being placed inside a respective magnetic field CMi. Each transducer TMi placed inside the magnetic field CMi forming a measurement block for which the range in which the resistance of the transducer TMi of said block varies linearly to within ±xi% is offset by Ii and becomes [ai+Ii; bi+Ii]. Each intensity Ii being different from the others so as to obtain N different ranges [ai+Ii; bi+Ii], being an integer number greater than or equal to two. There is further included a computer capable of selecting one or more measurement blocks for which the intensity of the magnetic field to be measured lies within the range [ai+Ii; bi+Ii] of the block, and establishing the measurement of the intensity of the magnetic field on the basis of the measurement of only the one or more measurement blocks selected.

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Patent Owner(s)

Patent OwnerAddress
RENAULT S A S122-122 BIS AVENUE DU GÉNÉRAL LECLERC BOULOGNE-BILLANCOURT 92100

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bacquet, Sylvain Chasselay, FR 24 77
Delaet, Bertrand Bernin, FR 15 47

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