Method for operating a magnetostrictive position measuring device

US10697808B2 · kind B2 · utility

Assignee

• BALLUFF GMBH · DE

Inventors

• Achim Zern · Heilbronn, DE
• Tobias Rupp · Stuttgart, DE
• Sandor Pali · Veszprém, HU

Key dates

• Filing date: Jul 13, 2018
• Grant date: Jun 30, 2020
• Expiry date: Dec 18, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D5/485
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for operating a magnetostrictive displacement measuring device, having a wave guide for guiding at least one mechanical wave, at least one damping zone, a magnetic position encoder which is displaceably arranged along a measuring range of the position measuring device and a detection unit, generates the at least one mechanical wave by an excitation signal (IP) having a clock frequency (f1, f2), at least two mechanical waves having respectively different clock frequencies (f1, f2, f) being generated. The clock frequencies can be predetermined such that interfering reflections (R11, R12) occur at different positions (x11, x21, x2) of the measuring range of the displacement measurement device, and during the method of the position encoder, switching between the different clock frequencies (f1, f2, f) takes place, such that the interfering reflections (R11, R12) on the respective different positions (x11, x21, x22) of the measuring range are masked out.