Patent ID: 9121730
Filing Date: 2015-09-01
Classification: G01D

Abstract:
1. A position measuring system, comprising: a first portion including a material measure having a plurality of markings arranged in series that are each able to assume two different values, the markings of the plurality of markings having a constant separation distance λ, a respective number m of directly successive markings of the plurality of markings codes an explicit absolute position along the material measure, and a number m−1 of the directly successive markings do not code the explicit absolute position; and a second portion configured to be moved relative to the first portion, the second portion including a scanning device having a number k of individual sensors configured to scan a number n of the directly successive markings, wherein a separation distance δ of the individual sensors is δ=λ×n÷k, wherein the scanning device is functionally connected to an evaluation device in order to ascertain a position of the second portion relative to the first portion, wherein a condition n>m is satisfied, and wherein the evaluation device is configured to recognize a scanning error in the individual sensors of the scanning device.