Method for localizing patterns in a signal of a position sensor, and position sensor or position measuring device using the method

An evaluation unit for operating an electromagnetic, in particular magnetostrictive, or acoustic position measuring device comprising at least one position sensor, at least one position encoder and a waveguide, said position measuring device comprising a control device for generating an interrogation pulse in the waveguide and an evaluation unit for evaluating a wave form delivered by the position sensor, said evaluation unit comprising:

• calculation means for generating a complex reference wave form and for calculating the position of the position encoder by measuring a time between triggering of the interrogation pulse and a point in time at which a wave form recorded by the position sensor is recorded to determine a position of the position encoder via a relationship between distance and time, by implementing position recognition by means of the position encoder by localising patterns in the wave form recorded by the position sensor, by implementing localisation of such patterns on a basis of correlation observations, and by transforming a complex cross-correlation wave form characterising the position encoder at least into another wave form.

A position measuring device for electromagnetically, in particular magnetostrictively, or acoustically measuring positions, comprising at least one position sensor, at least one position encoder and a waveguide, said position measuring device comprising a control device for generating an interrogation pulse in the waveguide, said position measuring device comprising:

• an evaluation unit for evaluating a wave form delivered by the position sensor comprising calculation means for generating a complex reference wave form and for calculating the position of the position encoder by measuring a time between triggering of the interrogation pulse and a point in time at which a wave form recorded by the position sensor is recorded to determine a position of the position encoder via a relationship between distance and time, by implementing position recognition by means of the position encoder by localising patterns in the wave form recorded by the position sensor, by implementing localisation of such patterns on a basis of correlation observations, and by transforming a complex cross-correlation wave form characterising the position encoder at least into another wave form.