Patent ID: 8370099

Claim:
A method of calibrating an angular sensor comprising a transducer for converting a real value of a physical quantity (φ), lying within an overall range of variations, into an electrical signal (VS1) according to a first predefined function f1(VS1=cos 2φ+OB1) having a factor (OB1) liable to drift according to an external condition, the method comprising: a first step of measuring known values of the physical quantity distributed within the overall range of variations and with at least two values of an external condition; a step of determining, from the first series of measured values, a set of correcting parameters for taking into account a drift of the sensor according to the external condition; a second step of measuring a known additional value of the physical quantity chosen in a restricted range of variations included within the overall range of variations, and with at least two values of the external condition; and a step of adjusting, using a processor the set of correcting parameters from the second measurement step, comprising a step of calculating a function of the electrical signal (VS1) produced by the transducer and of the first predefined function to determine the measured value of the physical quantity from the electrical signal reduced by a correcting factor (OBP1), said correcting factor (OBP1) varying with the external condition according to a second predefined function f2(OBP1=TCO1×T+SO1) that includes at least one correction parameter, wherein the at least one correcting parameter is defined in the second predefined function associated with the external condition (T) wherein TCO1 and SO1 are correcting parameters for the temperature drift of the first transducer to carry out the second measurement step.