MAGNETIC INCREMENTAL MOTION DETECTION SYSTEM

摘要

A magnetic incremental motion detection system (110) for outputting a plurality of voltage and/or current signals in digital form wherein the voltage and/or current signals are a collective representation of any incremental rotational, linear, or pivotal movement of an object. A target (120) of the system (110) is adjoined to an object to synchronously move with the object. A plurality of indications (121c, 121d) are adjoined to the target (120), and uniformly and serially disposed along an area (121a) of a surface (121) of the target (120). The system further comprises one or more magnetic sensors (80, 180) spatially positioned from the area of the surface to define air gap areas therebetween. Each of the magnetic sensors (80, 180) are operable to output an analog signal in response to a synchronous movement of the target with the object, and one of two digital circuits (85, 185) output a digital signal in response to the analog signal. The outputted digital signals have the same duty cycle, and are consistently out of phase with each other by the same degree.