08-03-2018, 01:01 PM
I'm stumped.
Im looking at it from the point of track circuits and axle counters.
Axle counter is a discrete track vacancy detection system
Track circuit is a continous track occupancy detection system
I can understand a track circuit positively proving the absence of a train = power supply-track-relay-signal
If the train shunts the track and places signal to danger is this positively proving presence of a train?
I would say a track circuit needs to prove track clear and axle counter needs to positively prove the presence of a train.
Im going round in circles. Been reading as much info as i can but still cant come up with a coherent answer/explanation.
Thoughts would be most welcome!!!!!!
Im looking at it from the point of track circuits and axle counters.
Axle counter is a discrete track vacancy detection system
Track circuit is a continous track occupancy detection system
I can understand a track circuit positively proving the absence of a train = power supply-track-relay-signal
If the train shunts the track and places signal to danger is this positively proving presence of a train?
I would say a track circuit needs to prove track clear and axle counter needs to positively prove the presence of a train.
Im going round in circles. Been reading as much info as i can but still cant come up with a coherent answer/explanation.
Thoughts would be most welcome!!!!!!