Patent ID: 6084400
Filing Date: 2000-07-04
Classification: G01D,G01P

Abstract:
Angle of rotation sensor (1) for measurement of the angular position of a rotary shaft (2) over more than one revolution, including a fine angle of rotation sensor (3) attached to the rotary shaft which measures the absolute angular position of the rotary shaft over one revolution, and a counting arrangement (4) to count the total number of revolutions of the rotary shaft, wherein the counting arrangement (4) comprises at least two pulse-wire motion sensors (70, 71) fixed on an arc-segment, at least one permanent magnet (72), a nonvolatile read/write memory (21) and an electronic counter circuit (13); wherein a part of the electrical energy provided by the pulse-wire motion sensor (13) is used as a voltage supply;wherein each pulse-wire motion sensor is connected to a pulse forming circuit (16), comprising a charging element (24) which is supplied with voltage pulses from the motion sensors via a switching element (23), and a further switching element (27) through which the voltage of the charging element is passed to an auxiliary voltage supply (34).