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AssigneeBaumuller Nurnberg GmbH
InventorFritz R. Gotz
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Process for the measurement of the absolute position of the movable, cyclic division mark carrier of an incremental position indicator or rotation indicator/resolver within and/or with regard to one of its divisional segments, periodically formed and/or delimited by the division marks on the carrier, with two scanning elements, stationarily arranged and addressing the division marks, which are positioned at such a distance from one another along the length or periphery of the segment that they deliver two sine- and cosine-like measurement signals which are evaluated on the basis of the arctangent function for position determination, by utilizing the values or components of a parameter vector identifying the measurement process, which is continuously redetermined during the measurement operation according to preset optimization criteria, for correction of the evaluation for disturbances and inaccuracies in the position indicator.
Process for measurement of an absolute position of a movable cyclic division mark carrier of an incremental position indicator with regard to one of its divisional segments periodically formed by division marks on the carrier, with two scanning elements, stationarily arranged and addressing the division marks, positioned at such a distance from one another along a length of the segment that they deliver sine and cosine-like measurement signals, respectively, which are evaluated according to an arctangent function for position determination, the measurement process comprises, for correction of the evaluation relative to disturbances and inaccuracies in the position indicator, components of a parameter vector identifying the measurement process on the basis of a mathematical model are used in the arctangent function, said mathematical model including a form of at least one function of the determined absolute position of time division mark carrier and the at least one function is computed in parallel to the running measurement process and is continuously updated, and thereby computed function values of of the model are compared with measurement signals from the scanning elements and processed by an adaption rule so as to adjust the parameter vector relative to the current measuring process by optimization of a predetermined criteria.
Device for measurement of an absolute position of a movable cyclic division mark carrier of an incremental position indicator with regard to one of its divisional segments periodically formed by division marks on the carrier, with two scanning elements, stationarily arranged and addressing the division marks, positioned at such a distance from one another along a length of the segment that they deliver sine and cosine-like measurement signals, respectively, with a computing system including an evaluation unit which receives the measurement signals, and in which these measurement signals are adjusted according to an arctangent function for determination of the absolute position, wherein the computing system includes an adaptation unit, connected on an input side, parallel to the evaluation unit, with the measurement signals and with an absolute position signal determined by the evaluation unit and, on an output side, with the evaluation unit, for transmission of adaptive measurement signals which are generated according to an adaptation rule implemented in the adaptation unit independently of the measurement signals, and that the adaptive measurement signals are combined with the measurement signals in the evaluation unit, according to a correction-calculating rule.
Dependencies are inferred from the claim text.