Patent ID: 9013192
Filing Date: 2015-04-21
Classification: G01B,G01D

Abstract:
1. A measurement device for absolute position measuring, comprising: a sensor unit as a planar coil structure having a coil element; and a binary encoded scale with areas of variable reluctance or conductivity along a measurement path, wherein, for measuring the absolute position within a measurement length, at least two parallel divisions which are each encoded aperiodically, bit by bit are provided which for each bit formation have different effects on the coil element, wherein each coil element is balanced in offset and has for each bit scanning quasi enclosed windings for emitter and receiver coils, which by themselves only serve for an individual specified bit formation, wherein the sensor structure, in addition to emitter windings of the coil element, which are necessary for formation of the individual bits, has additional emitter windings or conductor tracks which alone serve for compensation of electromagnetic fields in order to compensate output signals in offset or amplitude.