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11
Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
The waveguide consists of a special
nickel-iron alloy with 0.7 mm O.D. and
0.5 mm I.D.
A copper conductor is introduced
through the length of this tube. The
start of measurement is initiated by a
short current pulse. This current
generates a circular magnetic field
which rotates around the waveguide.
A permanent magnet at the point of
measurement is used as the marker
element, whose lines of field run at
right angles to the electromagnetic
field.
In the area on the waveguide where the
two fields intersect, a magnetostrictive
effect causes an elastic deformation
of the waveguide, which propagates
along the waveguide in both directions
in the form of a mechanical wave.
The mechanical wave is converted
to an electric signal by the signal
converter. The propagation time of the
mechanical wave is determined by the
position of the permanent magnet and
can be determined to resolutions down
to 1 µm.
Enhanced Magnetostrictive Technology Overview
Initial Pulse
Mechanical Wave
Receiver
Signal Converter
Copper
Conductor
Position Marker
with Magnets
Electromagnetic Field
Damping
Mechanical Wave
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