A monitoring system comprises a sensor 10 in an underground railway tunnel 5, a leaky feeder cable 30 extending along part of the tunnel and a gateway 40. The sensor wirelessly transmits sensor data via a low power wide area network (LPWAN) radio frequency signal 20. The cable conveys the signal to the gateway, which transmits a message 50 based on the sensor data to a remote server. A point of interface (35,Fig.7) may connect the leaky feeder cable, gateway and a trunked radio system 80 (e.g. for police, fire service, emergency service or railway staff). The sensor may sense door status, temperature, humidity, vibration, wind speed, moisture, water level, voltage or a pump, fire panel or circuit breaker status, e.g. detecting an intruder or passenger. Alternatively, a leaky feeder cable extends between two locations along an underground railway tunnel wall, ceiling or floor and multiple sensors transmit data via LPWAN RF signals through the cable to one or both locations.
System and apparatus for monitoring underground railway tunnel
2022-02-23
Patent
Electronic Resource
English
Heat extraction in underground railway tunnel
IuD Bahn | 2005
|Underground railway or underground tramway
Engineering Index Backfile | 1965
|Railway Tunnel Safety Monitoring and Rescue Guarantee System
British Library Conference Proceedings | 2009
|Engineering Index Backfile | 1894
|