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Patent Searching and Data


Title:
MULTI-PERIODIC ABSOLUTE POSITION SENSOR
Document Type and Number:
WIPO Patent Application WO/2011/004120
Kind Code:
A3
Abstract:
The invention relates to a magnetic position sensor comprising at least one permanent magnet. The invention also relates to a magnetic device for detecting a torque between a first shaft and a second shaft that are connected via a torsion bar. The aim of the invention is to provide a device for determining the multi-periodic absolute position of a magnetized unit. The subject of the invention is therefore a magnetic position sensor (A) comprising at least the following: a magnetized unit (1), a first magnetosensitive probe (2) and a second magnetosensitive probe (3). The second magnetosensitive probe (3) is capable of measuring a number of complete rotations of the magnetic field in an absolute, incremental and reversible manner so as to determine a second datum relating to the position of the magnet (1), whether or not this second magnetosensitive probe (3) is powered. The sensor further includes a module for calculating the absolute position of the magnet (1) on the basis of the first and second data coming from the first and second probes (2, 3) respectively.

Inventors:
MASSON GERALD (FR)
BIWERSI STEPHANE (FR)
Application Number:
PCT/FR2010/051431
Publication Date:
December 01, 2011
Filing Date:
July 07, 2010
Export Citation:
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Assignee:
MOVING MAGNET TECH MMT (FR)
MASSON GERALD (FR)
BIWERSI STEPHANE (FR)
International Classes:
G01D5/249; B62D6/10; G01B7/30
Domestic Patent References:
WO1999011999A11999-03-11
Foreign References:
EP1167927A12002-01-02
DE102007039051A12009-02-26
US20080150519A12008-06-26
EP1203932A12002-05-08
DE102006032266A12008-01-17
Attorney, Agent or Firm:
NOVAGRAAF TECHNOLOGIES (Cedex Levallois-Perret, Cedex Levallois-Perret, FR)
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