30-12-2011, 11:18 PM
(30-12-2011, 02:55 AM)onestrangeday Wrote: Hi Peter:
ok, I see, so there is actual implementation on using 'duplicating' system for train detection purpose. I agree that it is very important for the logic of system to decided which one is normal (if other system is down) in order to determine the presence of train, otherwise WSF could occur. So have you seen any redundant design for track circuit ?
No. I am not sure that anyone has seen the need for the marginal reliability benefit vs the cost.
In aswering a question like this, you would need to think what failure modes would be avoided by the two receivers, and what failure modes will make both receivers show the track occupied. Would it really be worth it.
Peter