Commissariat a L'energie Atomique Et Aux Energies Alternatives

Dcns

Yannick Vuillermet

Henri Sibuet

Jean-Louis Coulomb

Olivier Nicolas Chadebec

Laure-Line Rouve

Laurent Demilier

Gilles Cauffet

A method of taking a plurality of measurements of the magnetic field using the plurality of sensors; includes assessing the inductive magnetic excitation; and determining the likely distribution of magnetic sources on the surface of the hull by resolving a system of equations derived from modeling the physical phenomena at play, on the basis of the plurality of measurements taken and the assessed inductive magnetic excitation. The model describes the induced magnetic sources as a distribution of dipolar sources and the remanent magnetic sources as a distribution of monopolar sources. A device () for determining the magnetization of the hull of a ship for implementing the method is also described.

Method for determining the magnetisation of the hull of a ship, and associated device

The invention concerns a method for the fabrication, on a plane substrate, of a microswitch actuatable by a magnetic field, comprising: a) the etching, in the upper face of the plane substrate, of cavities forming a hollow model of two strips, these cavities having vertical flanks extending perpendicularly to the plane of the substrate to form vertical faces of the strips, b) the filling of the cavities by a magnetic material to form the strips, then c) the etching in the substrate, by a method of isotropic etching, of a well that extends between the vertical faces of the strips and beneath and around one distal end of at least one of the strips to open out an air gap between these strips and make this distal end capable of being shifted between a closed position and an open position.

Method for fabricating a microswitch actuatable by a magnetic field

A magnetically actuatable contactor has first and second magnetic material strips extending longitudinally. Each has a pad with a contact face parallel to the longitudinal direction. The pads face each other when an intersection of the one contact face and a projection in a transversal direction of the other contact face forms an overlap zone having a surface area. A pad is capable of being transversally shifted in response to a magnetic field between closed and opened positions. In closed position and open positions, the faces and respectively in contact and separated. At least one strip forms pairs of facing pads disposed consecutively along the longitudinal direction. A bridge links two consecutive pads. A cross-section of the bridge is reduced relative to a cross-section of the pads and a surface area of a smallest cross-section of the bridge.

Contactor and switch

Growing community of inventors

Chambery, France

Yannick Vuillermet