Commissariat a L'energie Atomique

Michelin Recherche Et Technique S.a.

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Biomerieux, Inc.

Biomerieux Sa

Compagnie Generale Des Etablissements Michelin

Societe Detechnologie Michelin

Christian Jeandey

Jean-Jacques Chaillout

Marcel Locatelli

Edmond Tournier

Andre Briguet

Patrick Pouteau

Patrick Broyer

Marc Beranger

Michel Robert

Elisabeth Delevoye

Philippe Klein

Raymond Campagnolo

Frederic Ginot

Bernard Perrier

Mathieu Tupinier

Viviane Cattine

A generator having at least four coils wound around each of the winding axes, these four coils being spaced out from one another to cancel at least the first derivative up to the seventh derivative of the magnetic field generated by these coils, in parallel to the winding axis, at a central point when they are powered by the same current, and the circumference of each coil is a circle, the diameter of this circle being equal within 2% of the diameter of a circle defined by the intersection between a sphere centered on the central point and a plane, perpendicular to the winding axis of this coil, passing through this coil, the sphere being the same for all the coils wound around the same winding axis.

Generator of a homogenous magnetic field

A method for dividing an analyte present in a solution and that is fixed on magnetic particles, and devices to be used in the method and systems for implementing the method. The method includes sedimentation of the magnetic particles together with separation into a plurality of residues. One implementation: forms at least a residue of magnetic particles in a first receptacle; and displaces the at least the residues towards a plurality of second receptacles, preferably by relative translation of a magnetic system. The second receptacle is connected to the first receptacle through a fluid channel.

Method and device for division of a biological sample by magnetic effect

A device for counting the rotations of a tire on a vehicle using the deformations that the tire undergoes on each rotation of the wheel, comprising a casing, a sensor intended to generate an electrical signal on each rotation of the wheel, and connection means intended to mechanically connect the casing and the sensor to the surface of the tire. The sensor is in the form of a passive sensor in one piece with the casing, whereof the signals emitted are in proportion with the variations over time in a magnetic flux through the said passive sensor, and a magnetic field generator is arranged opposite the passive sensor. The connection means mechanically connect the casing to a first surface A and the magnetic field generator to a second surface B, the two surfaces A and B being substantially coplanar and offset from one another in a direction D by a given distance L. The electrical signal is produced by the relative displacements of the said passive sensor and the said magnetic field generator.

Tachometer for tires

A vehicle wheel arch having an electrical circuit for communicating with an electronic component installed in a tire of the vehicle. The wheel arch comprising an electrical circuit embedded within or installed on a surface of the wheel arch. The electrical circuit includes an antenna formed by a substantially flat arrangement of an electrical conductor and configured to communicate at least one of power and data to the electronic component installed in the tire.

Motor vehicle wheel arch comprising an electrical circuit and assembly comprising a wheel arch and power supply means

The invention relates to a fluxgate micromagnetometer implemented in thin layers, fitted with at least one excitation coil with an arrangement and a structure that bring improvements particularly in terms of the magnetometer footprint, reduction in the 'offsets' of measurements taken by the magnetometer, common mode rejection.

Micromagnetometer of the fluxgate type with improved excitation coil

The present invention relates to an autonomous device which is intended to be carried by a tire and wheel assembly in order to detect revolutions of said assembly, comprising at least one sensor which produces signals and an interpreter device which is connected to the sensor in order to interpret the signals produced by the sensor. The sensor is a passive sensor, the produced signals of which are proportional to the temporal variations of a magnetic flux though this sensor, and is intended to be integral in rotation with the tire such that the revolutions of said assembly correspond to the revolutions of said sensor. The invention likewise relates to an assembly provided with an autonomous device which permits detection of revolutions of the assembly, and a method for detecting revolutions of the assembly.

Detection of revolutions of a tire and wheel assembly by means of the Earth's magnetic field

Method for the wet dynamic separation of a suspension in liquid phase, comprising microparticles comprising a magnetic material and a liquid medium in which said microparticles are in suspension, in which method:

Method, device and apparatus for the wet separation of magnetic microparticles

The invention relates to an NMR device for detection of resonant protons contained in an object. The device comprises permanent magnets for producing a static and uniform magnetic field in a region located outside the device with respect to which the object will be positioned, these permanent magnets being laid out around an axis on which the said region is located, such that their magnetization direction is directed towards the said region and such that the magnetization values of the permanent magnets combine their effects to produce the static and uniform magnetic field in the said region. The device also comprises means for emission of an electromagnetic signal to the said region and reception of an electromagnetic signal returned from the said region in response to the emitted signal, these means being located inside the space delimited by the said permanent magnets.

Portable NMR measurement device

A device for the measurement by induction of a medium through a metal wall using a transmission portion permitting the induction of a signal in the medium beyond the metal wall and a receiver for receiving a signal transmitted by the medium in response to the induced signal. The transmission portion includes at least one current generator directly connected to the metal wall in such a way that the current passing into the wall induces a signal beyond the wall.

Induction measuring device in the presence of metal walls

The disclosure relates to an open magnetic structure for producing an intense, stable magnetic field, which is amplitude and direction-controlled in a region adjacent to said structure, having at least one magnetic source (4) for producing said magnetic field, characterized in that it also comprises at least one pole piece (5, 6) associated with the magnetic source and having a shape designed so as to control the magnetic field produced. Application to petroleum or oil research in drilled wells and to surface magnetic imaging.

Open magnetic structure including pole pieces forming a V-shape

System of permanent magnets for an intense magnetic field

A system of coils is disclosed for the production of imaging by nuclear magnetic resonance of gradients Gx and Gy. The system of coils is disposed on the outer surface of a straight cylinder of revolution of axis Oz and radius R. The coils include four patterns of conductor wires which are pairwise symmetrical with respect to a center O and pairwise symmetrical with respect to the vertical plane xOy. Each pattern has three arcs participating in the production of the gradient which is required. That is, two outward arcs are located close to the center O at respective distances h.sub.1 and h.sub.2 from plane xOy and a return arc is spaced further from the center O and is located at a distance H.sub.3 from the plane xOy. Each arc has three section a, b and c, with the two end sections a and c having the same length being traversed by a current which has one-half the intensity of the current passing through the central section b.

System of coils for producing magnetic field gradients of very uniform

System of coils for producing additional fields in a magnet having pole pieces for producing images by nuclear magnetic resonance. For producing gradients Gx=(.differential.Bz/.differential.x) and Gy=(.differential.Bz/.differential.y), it comprises two layers of orthogonal windings, one on each pole piece. For producing the gradient Gz=(.differential.Bz/.differential.z), it has two systems of windings of circular symmetry and axis Oz, located on the inner facing faces of the pole pieces and traversed by currents whose direction changes between the individual pole pieces.

Growing community of inventors

Saint-Egreve, France

Christian Jeandey