Author(s)

T. Engelberg & F. Mesch

Abstract

Eddy current sensor system for non-contact speed and distance measurement of rail vehicles T. Engelberg & F. Mesch Institut fur Mefl- und Regelungstechnik, University of Karlsruhe, Germany. Abstract The contribution deals with the concept and the performance of a new speed and distance measuring device for rail vehicles. The system consists of two eddy current sensors and a correlator. The sensors transform irregularities of the rail track (e.g. rail clamps) into two signals being similar but shifted by a transit time corresponding to the speed of the vehicle. The correlator extracts the transit time from the two sensor signals. The measuring system presented offers good accuracies with wide measurement ranges and good dynamical properties. Promising experimental results were obtained in the laboratory as well as during several field-tests. 1 Introduction Accurate and continuous speed and distance measurement of rail vehicles is required for example for future train control syste

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