A magnetic distance sensor with high precision

A magnetic distance sensor with high precision

A magnetic distance sensor working at very low frequency has been developed to measure distances up to 1m. The principle is similar to that of the 3-D magnetic tracker, but the system is optimized to minimize the error in distance for static measurements. The system is not affected by conductive obj...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. Vol. 186; pp. 137 - 142
Main Authors: Zikmund, A., Ripka, P.
Format: Journal Article
Language:English
Published: Elsevier B.V 01-10-2012
Subjects:
Actuators
Amplitudes
Calibration
Distance Sensor
Error analysis
Magnetic
Sensors
Systematic errors
Three dimensional
Very low frequencies
Distance Sensor
Magnetic
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Summary:A magnetic distance sensor working at very low frequency has been developed to measure distances up to 1m. The principle is similar to that of the 3-D magnetic tracker, but the system is optimized to minimize the error in distance for static measurements. The system is not affected by conductive objects. The uncertainty caused by noise and interference is below 2mm, even in a noisy environment. The measurement time of 3min can be decreased to 1min, depending on the amplitude of the interferences and the required accuracy. After applying corrections, systematic error of 5mm was achieved by using a calibration model. The system is scalable up to 20m range.
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ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2012.05.003