Snr Roulements

The Torrington Company

Christophe Nicot

Pascal Desbiolles

Christophe Duret

Olivier Blanchin

Achim Friz

Fernand Peilloud

Arnaud Salou

Alain Bochet

Michel Hehn

Alain Schuhl

Pascal Desboilles

Grégory Malinowski

Gérard Ballas

A magnetoresistive sensor for measuring the strength of a magnetic filed includes a stack of a reference element, a separation element and an element sensitive to the magnetic field. The reference element and the sensitive element have, respectively, a first and a second magnetic anisotropy in a first and a second direction. The sensitive element includes the superposition of a layer of a ferromagnetic material and a layer of an antiferromagnetic material which are arranged to obtain a magnetic moment having a component oriented in the direction of the field to be measured that varies reversibly in relation to the strength of the magnetic field to be measured, and linearly in an adjustable field range.

Magnetoresistive sensor for measuring the strength of a magnetic field

A system for determining at least one parameter of at least one member () rotating with respect to a fixed structure (), includes, for each rotating member (), an assembly includes a transponder (), a coder (), an absolute position sensor () and a device () for detecting the parameter or parameters issuing from the transponder (). The system also includes an activation device () which is connected to each sensor () and to each detection device (), the activation device being able, according to the absolute position of the coder, to activate the detection device () of an assembly when the transponder () of the assembly is in the transmission/reception cone of the antenna of the detection device.

System and method for determining a least one parameter of at least one rotating member by means of an absolute position signal

The invention concerns a system for determining at least one parameter of at least one member () rotating with respect to a fixed structure (), comprising, for each rotating member (), an assembly comprising a transponder (), a code () comprising a reference singularity, a sensor () able to deliver a signal comprising a reference pulse corresponding to the detection of the reference singularity, a device () for detecting the parameter or parameters issuing from the transponder () and a device for measuring the speed of rotation of the rotating member (); the said system also comprising an activation device () which is connected to each sensor (), to each detection device () and to each speed measurement device, the said activation device being able, when a reference pulse issuing from the sensor () of an assembly is recorded, to activate the detection device () of the assembly at a moment which is a function of the indexed position of the transponder () and of the measured speed, so that the transponder () of the assembly is in the transmission/reception cone of the communication means of the said detection device.

System and method for determining at least one parameter of at least one rotating member by means of reference and speed signals

A system for determining at least one parameter of at least one member rotating with respect to a fixed structure, the system including, for each rotating member, an assembly having a transponder, a coder, a position sensor, and a device for detecting the parameter or parameters issuing from the transponder. The system also includes a synchronisation unit connected to each sensor and to each detection device. The synchronisation unit including a device for determining an activation position of the detection device of an assembly when the transponder of the assembly is in the transmission/reception cone of the communication mechanism of the detection device, and an activation device that is able, by comparing the position of the coder with the activation position, to activate the detection device of the assembly in order to measure the parameter or parameters.

System and method for determining at least one parameter of at least one rotating member by means of a position signal

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

An actuating system having an electric motor that is controlled by a computer as a function of a setpoint position of a member that is to be actuated. The actuating system includes an encoder that is dependent on the movement of the motor, a sensor designed to deliver two square digital position signals in quadrature and which are representative of the position of the encoder, a device for processing the signals and which can determine the actual position of the encoder, and a device for comparing the actual position of the encoder with the position of the encoder that corresponds, in theory, to the applied setpoint. The actuating system can be used to actuate a member and/or actuate a device that meters the amount of fuel provided to a heat engine.

Actuation system comprising a digital position sensor

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

The invention relates to an electronically commutated motor ( ) comprising P phases and N pairs of poles, in which a circular multipole encoder ( ) is associated with the rotating ring ( ) of an anti-friction bearing ( ), said encoder ( ) comprising a main multipole track ( ) and a multipole commutation track ( ) comprising 2*P*N singularities ( ) equidistributed angularly and a control device comprising a fixed sensor ( ) capable of delivering square digital signals A, B in quadrature and a digital signal C in the form of 2*P*N pulses per revolution of the encoder ( ), a circuit for commutating ( ) the currents in the phase windings of the motor ( ) and a control circuit ( ) for the commutation circuit ( ).

Pulse-controlled electronically commutated motor

A device includes at least one magnetic field generator placed on a first plane of a right section of a shaft and at least one magnetic field detector placed in a second plane of a right section of the shaft. The detector produces a signal proportional to the torque following the relative angular shift of the field generator in relation to the detector, the magnetic field generator having a magnetic structure supported by support mechanisms connected to the turning shaft. The magnetic field detector is located roughly opposite the magnetic field generator and is supported by support mechanisms connected to the turning shaft.

Torque sensor for a turning shaft

The invention relates to an electric power-assisted steering system making it possible to apply an assist torque for the angular displacement of the wheels of a vehicle, said torque being applied by an electronically commutated motor ( ) comprising P phases and N pairs of poles, said system also comprising a device for controlling the motor ( ) comprising a circular multipole encoder ( ) comprising a main multipole track ( ) and a multipole commutation track ( ) comprising magnetic singularities ( ) equidistributed angularly, a fixed sensor ( ) capable of delivering square digital signals A, B in quadrature, and a signal C in the form of 2*P*N pulses per revolution of the rotor ( ), a circuit for commutating ( ) the currents in the phase windings of the motor ( ) and a control circuit ( ) for the commutation circuit ( ).

Pulse-controlled electric power-assisted steering system

Device for controlling an electronically commutated motor

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.

Bearing including at least one elastic deformation zone and a braking assemly including such a bearing

A device for a magnetic encoder, the magnetic encoder being designed to work with a sensor to measure the rotation of a rotating element, wherein a protective element, whose shape is designed to cover the active face of the magnetic encoder, is placed on the magnetic encoder during the storage, handling or shipment phases of the magnetic encoder.

Protective device for magnetic coder

A fixed magnetic sensor ( ) is used to determine absolute angular position of a turning component ( ). A detection device ( ) detects an angular position of a multipole magnetic ring ( ) near a reference angular position. A resetting device ( ) resets the angular position of the multipole magnetic ring ( ) detected by detection device ( ). The resetting device ( ) is capable of assigning a value called &ldquo;offset&rdquo; to the value of the absolute angular position of the multipole magnetic ring ( ). A determination device ( ) determines the absolute angular position of the multipole magnetic ring ( ) on all of the turns made by a turning component ( ) ascertained from the offset value and variations in the angular position.

Growing community of inventors

Quintal, France

Christophe Nicot