Robust Data Transmission With Eddy Current
Sensor System
Author(s)
S. Hensel, C. Hasberg&R. R¨utters
Abstract
Nowadays railway supervision systems use information carriers installed along
the track to define the train position or to provide information about the track as
for example maximum velocities. Current data transmission devices are electronic
systems, which are expensive to install and maintain. This paper proposes a novel
approach to use an eddy current sensor system, mounted on trains for speed measurements,
to receive data coded in a metal bar on the track. The transmission is
realized with a quadrature amplitude modulation in combination with the given
eddy current sensor system to show a cost-efficient and robust alternative to common
railway supervision systems.
Keywords: eddy current sensor system, QAM, railway disposition.
1 Introduction
Actual railway disposition and supervision systems are capable of ensuring a safe
railway transportation of goods and men. These systems use information carriers
placed along the track to define the position of the train or to provide information
about the track as for example maximum velocities. Currently, these data transmission
devices are electronic systems that are activated by the passing train to transmit
information. Drawbacks of these systems are the high installation and maintenance
costs. Moreover it is necessary to equip the train with a special receiver only
capable to work with specially designed encoders.
This paper describes an elegant way to use an eddy current sensor system,
already mounted on a train bogie to measure speed, by systematically manipulating
the electromagnetic properties within the measurement range of the sensor
system. The eddy current sensor system was originally developed at the depart-
Keywords
eddy current sensor system, QAM, railway disposition.
Related Book
Other papers in this volume
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