Method and a system for determining the angular position of a rotary element using multiple groups of sensors, and a bearing including such a system

摘要

This method determines an angular position of a rotary element in a system where a magnetic ring rotatably fastened to the rotary element in communication with multiple sensors each suitable for issuing a unitary electric signal representative of a magnetic field generated by the magnetic ring. At least two groups of sensors adapted to generate, based on the unitary sensor signals, at least one combined electric signal representative of the angular position of the magnetic ring. This method comprises; a) verifying the consistency the combined electric signal with at least one given rule b) assessing whether or not each group of sensors is correctly working based on the verification of step a); and if, a first group of sensors is not correctly working, disregarding its combined electric signal and relying on the combined electric signal of at least a second group of sensors for determining an angular position value.

主权项

1. A method for determining an angular position (θ) of a rotary element rotating with respect to a stationary element in a system where a magnetic ring rotatably fastened to the rotary element is arranged with respect to multiple sensors (CA1-CA3, CB1-CB3; CA1-CA5, CB1-CB5) each suitable for issuing a unitary electric signal representative of a magnetic field generated by the magnetic ring, the sensors arranged in at least two groups (A, B), each group of sensors being configured to generate, on the basis of the unitary signals of its sensors, at least one combined electric signal (SA, SB) representative of the angular position of the magnetic ring, the method comprising the steps of:
a) verifying, for each group of sensors (A, B), the consistency of its combined electric signal with respect to at least one rule; b) assessing whether or not each group of sensors (A, B) is correctly working on the basis of the verification of step a); and c) if a first group of sensors (A) is considered not to be correctly working (FA=0), disregarding its combined electric signal (SA) and relying on the combined electric signal (SB) of at least a second group of sensors (B) for determining an angular position value (θc) for the rotary element.