Correction device for correcting geometric error of position sensor unit of positioning system of e.g. measuring system, has unit, where device emits modified measuring signal with information and correction value is determined for unit

摘要

The device (60) has a sensor, where the device receives and emits a measuring signal with error prone position information valuable for determination of a current position of an element, and corrects the information by processing corresponding correction value. A modified measuring signal is emitted by the device with corrected position information, and a correction value is specially determined for a predetermined position sensor unit (50). The measuring signal has a carrier signal e.g. sinusoidal signal, modulated with the information by frequency or phase or amplitude modulation. Independent claims are also included for the following: (1) a method for correcting a position sensor unit (2) a positioning system comprising a program memory.