Magnetostrictive position measuring method and system with a start and stop impulse

Abstract

A magnetostrictive position measuring system is provided with a waveguide and which is allocated with a magnet movable along the waveguide. An impulse generator for generating an excitation pulse and a conductive wire for guiding the excitation pulse through the waveguide to the magnet are provided, whereby a torsion wave arises in the waveguide when the excitation pulse reaches the magnet. A reel for generating a reply pulse as a function of the torsion wave and a position calculation unit for ascertaining the position of the magnet as a function of the excitation pulse and the reply pulse are provided. A processor is provided in which a table is present in which a large number of positions and excitation pulse correction values are allocated to one another. The duration of the next excitation pulse is altered as a function of the position of the magnet ascertained and the associated excitation pulse correction value from the table.

Dependencies are inferred from the claim text.