Snr Roulements

Ntn-snr Roulements

Olivier Blanchin

Christophe Nicot

Christophe Duret

Arnaud Salou

Julien Lavoye

The invention concerns a system for determining the position of mobile element relative to a stationary structure, the system comprising an encoder configured to emit a pseudo-sinusoidal spatial signal representing the position of the encoder, a sensor () comprising a current-loop mount between at least two resistive elements () and a signal processing device Vconfigured to supply two quadrature signals respectively SIN and COS of same amplitude. The invention also concerns an antifriction bearing equipped with such a system for determining the angular position of the rotating ring relative to the stationary ring.

Current-loop position sensor and rolling bearing equipped with the same

The invention relates to a bearing comprising at least one system for determining the amplitude A of the pseudo-sinusoidal deformations of an area of the fixed race that are induced during rotation, the said system comprising at least three strain gauges (), a device for measuring three signals Vdepending respectively on the temporal variations of the signal emitted by each gauge (), the said device being able to form two signals SIN and COS respectively of like angle and like amplitude, and a device for calculating the amplitude A of the deformations of the area () as a function of time, the said device being designed to calculate the expression SIN+COSso as to deduce the amplitude A therefrom.

Deformation sensor bearing comprising at least three strain gauges

A bearing which includes at least one system for determining an amplitude of pseudo-sinusoidal deformations induced during rotation of a fixed ring within a zone, wherein the system includes four strain gauges spaced equally apart from each other within the zone, a device for measuring four signals based on time variations of a signal emitted by each gauge and for forming two signals for the same angle and amplitude, and a device for computing the time-dependent amplitude A of the zone deformations for calculating an expression such that the amplitude is derived therefrom.

Deformation-sensing bearing having four strain gauges

The invention concerns a suspension stop for a motor vehicle wheel, comprising a device for measuring the forces applied to the vehicle wheel, the said device comprising at least one deformation sensor () which is associated with a fixed member () of the said stop so as to measure the deformations of the said member which are caused by the said forces applied, and a calculation means able, from these deformations, to calculate the corresponding forces applied.

Suspension stop instrumented under deformation in order to measure forces

A suspension stop for a motor vehicle wheel assembly comprising a fixed member adapted to be fixed to the chassis () of the vehicle and a rotating member adapted to be fixed to the suspension spring () so as to be rotationally moved under the effect of the forces exerted by the spring. The stop includes a device for measuring the vertical forces applied to the vehicle wheel. The device includes a pulse-generating coder () fixed to one of the members, a sensor () fixed to the other member which is able to detect these pulses so as to determine the angular position of the rotating member with respect to the fixed member, and a calculation device able, from this position, to calculate the corresponding vertical force applied. A method of measuring the vertical forces applied to a wheel associated with the chassis () of a vehicle by such a stop is also provided.

Rotating instrumented suspension stop for measuring vertical forces

A method of calculating forces applied at an interface between a revolving element and a support on which the element revolves using a set of fixed sensors capable of delivering three independent signals representative of forces being applied on a fixed race of a bearing. The method is an iterative processing procedure and a calibration procedure, which is carried out before a first iteration of the processing procedure. The invention also applies such a method to the case of a tyre running on a road.

Calculation method of strains applied between a rotating part and a bearing on which it rotates

Bearing and interface assembly comprising at least one elastic deformation zone and a braking assembly comprising it

A bearing of the type comprising a fixed raceway ( ) intended to be associated with a fixed structure, a rotating raceway ( ) intended to be associated with a rotating member ( ) and rolling bodies disposed between them, in which the fixed raceway ( ) comprises first means ( ) of fixing the said bearing ( ) to the fixed structure. The fixed raceway ( ) comprises at least one elastic deformation zone able to be deformed under the action of forces exerted on the said bearing ( ). At least one sensor ( ) able to measure the said forces is functionally associated with the said elastic deformation zone.

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Annecy, France

Olivier Blanchin