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Magnetic Reference Mark in a Linear Positioning System Generated by a Single Wiegand Pulse.

Hung-Lin Lien¹, Jen-Yuan Chang¹

¹Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.

Sensors (Basel, Switzerland)

|May 20, 2022

Summary

Wiegand sensors produce repeatable pulses for linear positioning, achieving 0.3 um accuracy comparable to optical scales. Their pulse characteristics are independent of driving frequency, making them ideal for zero-speed transducers.

Keywords:

Wiegand effect Wiegand pulse Wiegand sensor reference mark

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Area of Science:

Physics
Materials Science
Engineering

Background:

Wiegand sensors utilize the Wiegand effect for magnetic flux changes.
These sensors are crucial for linear positioning systems requiring reference marks.

Purpose of the Study:

To characterize the fast magnetization reversal in Wiegand wire.
To reveal the mechanism for producing repeatable Wiegand pulses for precision linear positioning.
To optimize Wiegand sensor design for reliable reference marking.

Main Methods:

Experimental and numerical parametric studies.
Analysis of Wiegand pulse characteristics (magnitude, duration) under varying conditions.
Investigation of magnetic flux intensity and angle effects on pulse repeatability.

Main Results:

Wiegand pulse voltage and duration are independent of driving frequency.
Pulse repeatability is influenced by external magnetic field intensity and angle.
A mechanism for generating repeatable Wiegand pulses was identified.
Positioning repeatability of 0.3 um was achieved using Wiegand pulses as reference marks.

Conclusions:

Wiegand effect sensors are suitable for zero-speed transducer applications.
The identified mechanism enables optimal sensor design for precision linear positioning.
Wiegand sensors offer performance comparable to optical scales for reference marking.