Device for measuring the angular velocity or velocity of a moving part and for detecting the direction of motion of the moving part
AssigneeContinental Teves AG & Co. oHG
InventorHeinrich Acker
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Abstract
Motion detection device consisting of a single encoder and a single stationary sensor element, the encoder, which is arranged on a movable part, representing an asymmetrical pattern. The angular velocity or velocity and the direction of motion of a moving part are determined from the sensor signal by measuring the edge steepness or the rise time or fall time, spectrally analyzing the frequency and the phase relation of a harmonic to the phase of the fundamental mode, or evaluating the asymmetries of a sequence of rectangular pulses.
Claims9
A device for measuring the angular speed or the speed of a moving part and for detecting the direction of motion thereof with a sensor that can be or is disposed in a stationary manner and an encoder that can be or is disposed on the moving part, which together with the sensor generates a signal that follows the encoder form, wherein the encoder has a structure reproducing a periodic pattern for frequency measurement that is necessary for the angular speed/speed measurement, wherein the sensor comprises a single sensor element for frequency measurement and for detecting the direction of motion and the periodic pattern of the encoder is of asymmetric form, wherein the sensor comprises an evaluation unit configured to perform an analysis of a phase of a harmonic of the signal of a lowest possible order.
Dependencies are inferred from the claim text.