Patent ID: 8618466
Filing Date: 2013-12-31
Classification: G01D

Abstract:
1. A position-measuring device for measuring at least one of (a) linear and (b) angular positions, comprising: a first measuring standard including a first code track with which consecutive position regions are cyclically measurable; and at least two multiturn code disks including second code tracks, a currently measured region of the first code track determinable from angular positions of the multiturn code disks; wherein the first measuring standard and the multiturn code disks are positioned such that the first code track and the second code tracks are scannable by a single scanning unit having a single light emitter and a single detector unit, the first code track scannable by the illumination unit and the detector unit of the single scanning unit at a first scanning subregion, and each second code track scannable by the illumination unit and the detector unit of the single scanning unit at a respective second scanning subregion; wherein the first measuring standard is arranged as a single-turn code disk connected to a shaft in a rotatably fixed manner, a position region corresponding to a complete revolution of the shaft, a number of completed revolutions of the shaft measurable by the multiturn code disks; and wherein scanning of the first code track and the second code tracks by the illumination unit and the detector unit is performed inside of an illumination circle produced by the illumination unit.