Balluff Gmbh

Såndor Pali

Ernst Gass

Achim Zern

Tobias Rupp

Årpad Melles

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 (f, f), at least two mechanical waves having respectively different clock frequencies (f, f, f) being generated. The clock frequencies can be predetermined such that interfering reflections (R, R) occur at different positions (x, x, x) of the measuring range of the displacement measurement device, and during the method of the position encoder, switching between the different clock frequencies (f, f, f) takes place, such that the interfering reflections (R, R) on the respective different positions (x, x, x) of the measuring range are masked out.

Method for operating a magnetostrictive position measuring device

An inductive displacement sensor having a displaceable or rotatable, magnetically permeable measuring head, at least one measuring loop whose geometric shape varies in response to the longitudinal/rotary displacement of the measuring head, and at least one excitation loop by which a magnetic flux can be generated in the measuring head. The flux penetrates the at least one measuring loop at any point of the longitudinal/rotary displacement, essentially in the region of the measuring head, and inducing an electric measuring signal (i). A resonant circuit, which is electrically decoupled from the outside, is arranged on the measuring head and is excited in correct phase relation by a short voltage pulse after a number of, preferably, 10 to 20 free oscillations.

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Veszprém, Hungary

Såndor Pali