Michelin Recherche Et Technique S.a.

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Societe Detechnologie Michelin

Bernard Perrier

Christian Jeandey

Michel Robert

Thierry Penot

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

An actuator, designed to be used in a pressurized enclosure, creates a relative movement between two parts, in response to a variation of hydrostatic pressure. The actuator includes a closed-cell foam block fixed to the two parts. The actuator may be used in the deployment of wheel units and antennas inside a cavity formed by a tire and a wheel rim.

Hydrostatic-pressure-sensitive actuator

The invention relates to a support for a component for monitoring a tire, of the type intended to be secured to a wheel and tire system and comprising a support for securing the component in which the support has a component retaining force which is an increasing function of the pressure of the medium surrounding the support.

Growing community of inventors

Clermont-Ferrand, France

Bernard Perrier