Patent ID: 6410910
Filing Date: 2002-06-25
Classification: G01D

Abstract:
An angle measuring system for high-precision determination of the angular position of an object, the system comprising:a stationary component unit comprising one or more D/A converter units, to which error-corrected output signals are delivered, so that analog, angle-dependent output signals are transmitted to a downstream evaluation unit; a rotationally symmetrical measurement graduation that is connected to an object that rotates about an axis of rotation (R); a correction system comprising: a plurality of scanner units disposed in a defined three-dimensional orientation in the stationary component unit and serve to scan the measurement graduation at a plurality of different measurement graduation sites and generate angular-position-dependent fractional scanning signals; and a processing system that receives the fractional scanning signals of the scanner units and generates angle-dependent output signals that are freed of errors that result from a possibly occurring nonagreement of the axis of rotation (R) of the object with an axis of symmetry of the measurement graduation, wherein the processing system comprises electronic signal processing elements which process the fractional scanning signals of the plurality of scanner units in such a way that the error-corrected output signals are generated.