Abstract: The invention concerns a method for determining the running condition of a member rotating on a surface. The method includes an initial process of performing a spatial frequency analysis of the rotational speed of the member to identify at least one frequency window not including a harmonic of the revolution of the member wherein a law determining the running condition is established, and thereafter, an iterative process for determining the running condition including measuring the rotational speed V of the member; spatially sampling the speed with a constant spatial sampling period ?d; and analyzing the sampled signal in the frequency window identified so as to determine the running condition on the basis of the established law.

Abstract: A method for determining two pseudo-sinusoidal signals in quadrature from a pseudo-sinusoidal signal transmitted by an encoder is provided. The method using a sensor arranged within reading distance of the encoder, which sensor includes at least four sensing elements which are linearly equally distributed. The sensing elements are each capable of delivering a signal Si representative of the signal transmitted by the encoder. The method measuring the signals Si and combining the signals Si in order to form the signals U=(S1?S2)?(S3?S4) and V=(S2?S3), which signals U and V are in quadrature. A system for determining by implementing such a method, as well as a bearing including such a determination system, are provided.

Abstract: 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 (2) comprising a current-loop mount between at least two resistive elements (3) and a signal processing device Vi configured 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.

Abstract: 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 (7), a device for measuring three signals Vi depending respectively on the temporal variations of the signal emitted by each gauge (8), 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 (7) as a function of time, the said device being designed to calculate the expression SIN2+COS2 so as to deduce the amplitude A therefrom.

Abstract: 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.

Abstract: The system for determining the absolute angular position ? of a steering wheel (1) of a motor vehicle with respect to the chassis thereof comprises a device for incrementally measuring the relative angular position ? of the steering wheel, a device (2) for measuring the differential velocity ?V/V of the wheels mounted on the same axle and a processing device (8) for sampling the angular positions and differential velocities at a period t. Said device comprises computing means suitable to determine at moments tn: the estimate ?*(tn) of an absolute angular position ?(tn) according to the differential velocity ?V/V, the mean difference offset(tn) between the angular positions ?*(tn) and ?(ti), wherein i is a variant ranging from 0 to n and the absolute angular position ?(tn) by the addition between the mean difference offset(tn) and the angular position ?(tn).

Abstract: 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.

Abstract: A roller bearing includes a fixed element and a rotating element. The roller bodies act as a support on the raceway of the fixed element by the intermediary of a contact surface (SC). The fixed element includes a free surface which is deformable elastically by the forces induced by the passage of the roller bodies during the rotation of the rotating element. The surface has at least one instrumented area whereon is associated at least one pattern of a sensitive material. The said area is delimited axially between the surface (S1) defined by revolution around the axis of the bearing of the straight line (D1) passing through the center (Cr) of a roller body deforming the surface and by the center (CS) of the contact surface (SC) of the roller body and the surface (S2) defined by revolution around the axis of the bearing from the normal line (D2) to the deformable surface that passes through the center (CS) of the contact surface (SC).

Abstract: A method is provided for estimating the components of the force torsor that are applied to a bearing, which method provides for the measurement of a vector (Vm) of N deformations and for the use of a physical model linking a vector (Q) of at most N representative values of the components of the torsor with a deformation measurement vector, the method comprises the following iterative steps: introduction of a vector (Q) of representative values into the model in order to calculate a deformation measurement vector (Vc); and carrying out a pertinence test (T) between the deformation measurement vector (Vc) which is calculated and the measured vector (Vm); if the test (T) is negative, establishing at least one new vector (Q) of representative values to be introduced into the model according to the result of the test; or if the test (T) is positive, storing the vector (Q) of introduced values; wherein the estimated components of the force torsor are established according to at least one stored vector (Q) of values

Abstract: 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 (7), a device for measuring three signals Vi depending respectively on the temporal variations of the signal emitted by each gauge (8), 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 (7) as a function of time, the said device being designed to calculate the expression SIN2+COS2 so as to deduce the amplitude A therefrom.

Abstract: The invention concerns a system for determining the position of mobile element relative to a stationary structure, said system comprising an encoder configured to emit a pseudo-sinusoidal spatial signal representing the position of the encoder, a sensor (2) comprising a current-loop mount between at least two resistive elements (3) and a signal processing device Vi configured 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.

Abstract: The system for determining the absolute angular position ? of a steering wheel (1) of a motor vehicle with respect to the chassis thereof comprises a device for incrementally measuring the relative angular position ? of the steering wheel, a device (2) for measuring the differential velocity ?V/V of the wheels mounted on the same axle and a processing device (8) for sampling the angular positions and differential velocities at a period t. Said device comprises computing means suitable to determine at moments tn: the estimate ?*(tn) of an absolute angular position ?(tn) according to the differential velocity ?V/V, the mean difference offset(tn) between the angular positions ?*(tn) and ?(ti), wherein i is a variant ranging from 0 to n and the absolute angular position ?(tn) by the addition between the mean difference offset(tn) and the angular position ?(tn).

Abstract: The invention relates to a bearing comprising at least one system for determining the amplitude A of pseudo-sinusoidal deformations induced during rotation of a fixed ring (1) area (7), wherein said system comprises four stress gauges (8), a device for measuring four signals Vi based on time variations of a signal emitted by each gauge (8) and for forming two signals SIN and COS for the same angle and amplitude and a device for computing the time-dependent amplitude A of the area (7) deformations for calculating a SIN2+COS2 expression in such a way that the amplitude A is derived therefrom.

Abstract: The invention concerns a method for determining the running condition of a member rotating on a surface, said method comprising the initial process which is consists in performing a spatial frequency analysis of the rotational speed of the member so as to identify at least one frequency window not including a harmonic of the revolution of the member wherein a law determining the running condition is established, and an iterative process for determining the running condition comprising steps which consists in measuring the rotational speed V of said member; spatially sampling said speed with a constant spatial sampling period ?d; analyzing the sampled signal in the frequency window identified so as to determine the running condition on the basis of the established law.

Abstract: A method for determining two pseudo-sinusoidal signals in quadrature from a pseudo-sinusoidal signal transmitted by an encoder is provided. The method using a sensor arranged within reading distance of the encoder, which sensor includes at least four sensing elements which are linearly equally distributed. The sensing elements are each capable of delivering a signal Si representative of the signal transmitted by the encoder. The method measuring the signals Si and combining the signals Si in order to form the signals U=(Si-S2)?(S3-S4) and V=(S2-S3), which signals U and V are in quadrature. A system for determining by implementing such a method, as well as a bearing including such a determination system, are provided.

Abstract: A pseudo-sinusoidal signal includes a plurality of sensing areas each of which are capable of delivering a signal Si representative of the signal to be detected. The sensing areas are arranged such that, for the same detected signal, at least one sensing area delivers a signal Si of a different amplitude than that of the signal delivered by another sensing area. Bearings may be equipped with such a sensor.

Abstract: The invention relates to a method for determining the absolute angular position ? of a steering wheel (2) of a motor vehicle with respect to the chassis thereof comprising an initial procedure for determining whether a detected binary sequence is non-repetitive and, if yes, to test whether an estimate makes it possible to discriminate the absolute angular position of a encoder (1) in the case when the binary sequence is non-repetitive on a sector and to discriminate the absolute angular position of the steering wheel (2) ?2 corresponding to said non-repetitive binary sequence; if no, to test whether an estimate makes it possible to discriminate the absolute angular position ?3 of the steering wheel corresponding to said binary sequence.

Abstract: A system for determining at least one parameter of at least one member (1) rotating with respect to a fixed structure (2), includes, for each rotating member (1), an assembly includes a transponder (3), a coder (5), an absolute position sensor (6) and a device (4) for detecting the parameter or parameters issuing from the transponder (3). The system also includes an activation device (7) which is connected to each sensor (6) and to each detection device (4), the activation device being able, according to the absolute position of the coder, to activate the detection device (4) of an assembly when the transponder (3) of the assembly is in the transmission/reception cone of the antenna of the detection device.

Abstract: The invention concerns a system for determining at least one parameter of at least one member (1) rotating with respect to a fixed structure (2), comprising, for each rotating member (1), an assembly comprising a transponder (3), a code (5) comprising a reference singularity, a sensor (6) able to deliver a signal comprising a reference pulse corresponding to the detection of the reference singularity, a device (4) for detecting the parameter or parameters issuing from the transponder (3) and a device for measuring the speed of rotation of the rotating member (1); the said system also comprising an activation device (7) which is connected to each sensor (6), to each detection device (4) and to each speed measurement device, the said activation device being able, when a reference pulse issuing from the sensor (6) of an assembly is recorded, to activate the detection device (4) of the assembly at a moment which is a function of the indexed position of the transponder (3) and of the measured speed, so that the tr

Abstract: The invention concerns a magnetoresistive magnetic field sensor comprising a stack (1) of a reference element (2), a separation element (3) and an element (4) sensitive to the magnetic field, in which the reference element (2) and the sensitive element (4) have respectively a first and a second magnetic anisotropy (5, 6) in a first and a second direction. The sensitive element (4) comprises the superposition of a layer of a ferromagnetic material (FM1) and a layer of an antiferromagnetic material (AF1) which is arranged in order to obtain a magnetic moment (10) whose component oriented in the direction of the field to be measured varies reversibly in relation to the strength of the magnetic field to be measured, and linearly in an adjustable field range. The invention also concerns a use of such a sensor.