Method for locating at least one movable magnetic object and associated system
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United States of America Patent
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May 25, 2021
Grant Date -
Dec 7, 2017
app pub date -
Dec 7, 2015
filing date -
Dec 9, 2014
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Abstract
A method for locating at least one movable magnetic object relative to a network of at least N tri-axial magnetometers linked together mechanically with no degree of freedom to retain a known relative position of these magnetometers, N being an integer number at least equal to 2, comprises, continuously: a step of detection of a magnetometer capable of being magnetized, i.e. capable of delivering as output measurements comprising a measurement bias following a magnetization; a step of correction, by means of a correction bias, of the measurements delivered by the magnetometer capable of being magnetized, the correction bias corresponding to a deviation between the measurements supplied by the magnetometer as input for a location filtering and the estimations, upon the location filtering, of the data delivered by the magnetometer; and a step of consideration of the magnetometer as not capable of being magnetized, by taking into account the step of correction of the magnetometer capable of being magnetized.
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