Position sensors offer high accuracy
A
MTS product story
Edited by the Engineeringtalk editorial team
Mar 8, 2007
Temposonics position sensors offer a standard 0.01% FS linearity error between measured and real physical position
In the course of continuous progress in mechanical engineering, ever increasing requirements are made on the installed sensor technology and on measurement accuracy.
Temposonics position sensors offer a standard 0.01% FS linearity error between measured and real physical position The waveguide is made of a special iron and nickel alloy.
For applications requiring an optimum of measurement accuracy, MTS recently developed the optional internal linearisation for the Temposonics R-series.
The linearisation circuitry is directly integrated into the electronics in the sensor head and compensates even the smallest linearity errors.
Dependent on the measurement length, the sensor can measure positions with an accuracy multiplied by factor 10.
For calibration, MTS tests the signal output by each individual sensor on a laser interferometer in steps of 0.001mm, thus determining its individual linearity curve.
The deviations from the ideal curve are stored for the positions in a corrective table integrated in the sensor electronics.
During subsequent field measurement, the electronics provides the applicable reference value for correction of the input signal.
As the measurement values delivered by the sensor are very stable over a long time, the corrective table can be used over and over again.
For measurement lengths up to 500mm, the internal linearisation improves the measurement accuracy by a factor of three.
With sensors of lengths between 500 and 5000mm, the measurement accuracy is increased by a factor of five compared to the standard version, resulting in deviations from the actual position of 0.02mm.
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