Moving Magnet Technologies (mmt)

Mmt Sa

Sonceboz Sa

Nikola Jerance

Didier Frachon

Richard Arlot

Gérald Masson

Thierry Dorge

The invention relates to an angular or linear magnetic position sensor that comprises a mobile member including at least one magnet () having a magnetization direction that varies linearly along the movement direction of the magnet in a surface defined by said movement direction and in a normal direction, at least four magneto-sensitive elements (and) and at least one processing circuit () providing a signal based on the absolute position of the mobile member, characterized in that a first set of magneto-sensitive elements () and () are located at a same point, the first couple of magneto-sensitive elements () being spatially offset from a second couple of magneto-sensitive elements () along the movement direction, and in that the magneto-sensitive elements (and) measure the tangential component of the magnetic field while the magneto-sensitive elements (and) measure the normal component of the magnetic field in order to provide, after algebraic combination of the components taken in pairs, two sinusoidal signals substantially having an electrical phase shift of 90&#xb0;.

Angular or linear magnetic position sensor not sensitive to external fields

An angular position sensor includes a moving element consisting of at least one essentially cylindrical permanent magnet turning about it axis, at least two magnetosensitive elements and at least one processing circuit furnishing a signal dependent on the absolute position of the moving element The magnetosensitive elements are located essentially at the same point and in that they measure the tangential component of the magnetic field and the radial and/or axial component of the magnetic field for furnishing 2 sinusoidal signals that are essentially 90&#xb0; out of phase.

Magnetic angular position sensor including an isotropic magnet

A magnetic sensor of rotary, linear, or curvilinear displacement using at least one permanent magnet and at least one magnetosensitive element, which can move with respect to one another. The magnet exhibits a direction of magnetization that varies continuously along the direction of displacement, with the exclusion of a diametral magnetization in the case of a rotary sensor.

Growing community of inventors

Besancon, France

Nikola Jerance