Abstract: 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.

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 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 coder (5), an absolute position sensor (6) and a device (4) for detecting the parameter or parameters issuing from the transponder (3); the said system also comprising an activation device (7) which is connected to each sensor (6) and to each detection device (4), the said 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 communication means of the said 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 coder (5), a position sensor (6) and a device (4) for detecting the parameter or parameters issuing from the transponder (3); the said system also comprising a synchronisation unit (7) which is connected to each sensor (6) and to each detection device (4), the said unit comprising a device (7a) for determining an activation position of the detection device (4) of an assembly when the transponder (3) of the assembly is in the transmission/reception cone of the communication means of the said detection device, and an activation device (7b) able, by comparing the position of the coder (5) with the activation position, to activate the detection device (4) of the assembly in order to measure the parameter or parameters.

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 t

Abstract: A device for determining the absolute angular position of a turning device with respect to a fixed structure, including an encoder provided with a main multipolar track and a multipolar track called “top turn”, said top turn track includes M singularities which are distributed angularly so that the top turn signal (C) is arranged so as to define, in conjunction with the signals A and B, the binary sequences which are each representative of an absolute angular position of the encoder. The invention also concerns a steering system for automobiles as well as a bearing including such a device.

Abstract: A device for controlling an electronically switched motor comprising a coder (2) provided with a main multipole track (2a) and a so-called “revolution pip” multipole track (2b), the said tracks each comprising N identical sectors (2c) angularly distributed respectively over the entire circumference of the said tracks, the sectors (2c) of the revolution pip track (2b) each comprising M angularly distributed singularities (2b1), the M singularities (2b1) being distributed angularly so that the revolution pip signal (C) is arranged so as, in combination with the signals A and B, to define binary sequences of angular length less than that of the sectors (2c) and which represent the absolute angular position of the coder (2) on a sector (2c). The invention also relates to a bearing and a motor equipped with such a device, as well as a method for controlling such a motor.

Abstract: A device for determining the absolute angular position of a turning device with respect to a fixed structure, including an encoder provided with a main multipolar track and a multipolar track called “top turn”, said top turn track includes M singularities which are distributed angularly so that the top turn signal (C) is arranged so as to define, in conjunction with the signals A and B, the binary sequences which are each representative of an absolute angular position of the encoder. The invention also concerns a steering system for automobiles as well as a bearing including such a device.

Abstract: The invention relates to a device for controlling an electronically switched motor comprising a coder (2) provided with a main multipole track (2a) and a so-called “revolution pip” multipole track (2b), the said tracks each comprising N identical sectors (2c) angularly distributed respectively over the entire circumference of the said tracks, the sectors (2c) of the revolution pip track (2b) each comprising M angularly distributed singularities (2b1), the M singularities (2b1) being distributed angularly so that the revolution pip signal (C) is arranged so as, in combination with the signals A and B, to define binary sequences of angular length less than that of the sectors (2c) and which represent the absolute angular position of the coder (2) on a sector (2c).