The information is conveyed by superposition of two amplitude-modulated alternating currents in the rails (with a carrier frequency of 50 Hz and 178 Hz, respectively). Receiver coils in front of the first axle of a locomotive or control car are used to detect the signal.
MERMEC monitoring system measures the magnetic field produced by the coded rail currents and analyzes their signal and modulation looking for anomalies of both current source and detectors. Dedicated sensors are installed in front of the first axle of a locomotive or control car in both vehicle directions.
TECHNICAL SPECIFICATIONS Request Brochure
- Signal amplitude from right and left sensors
- Electro-magnetic field intensity
- Carriers Frequency
- Carriers Intensity
- Carriers Alerts
- Code division
- Carriers Intensity for track circuits
- RMS index
- Return currents asymmetry