Monitoring rail-track position
These monitors are installed to measure the rail track position during the construction of an underpass. The system triggers automatically an alarm if the track has moved beyond a defined threshold. In such an event, the dispatcher is immediately notified via an SMS message. The aim was to generate an alarm signal in the event of a threshold inclination of more than 3mm (approx. 0.12º).
Two-axis inclination sensors were required, which are robust against impacts and vibration when trains cross, tolerate large temperature differences (-40º to +85º) and moisture (IP67) with high reproducibility, without hysteresis, and high long term stability (<0.03º/year). Sherborne’s T233 meets the requirements. The sensors were protected with a suitable sheet against stone chips and direct sunlight. The strong vibrations of a passing train are measured by the sensor at 1 Hz and additional filters are used in the data acquisition system.
The force-balanced LSOC from Sherborne is specially designed for operation in harsh environments. Thanks to the internal temperature compensation and the highly reproducible force balanced technology it was possible to fulfill all requirements.
Sherborne Sensors’ high precision inclinometers measure horizontal and vertical angular inclination with virtually infinite resolution; providing highly accurate tilt and inclination measurements for demanding industrial applications.