|
|
Post by jamesb on May 22, 2012 6:02:28 GMT
Travelling along in the tunnel, suddenly the 09ts stopped and the driver announced something was trapped in the doors and he would try to get the train moving.
Then we pulled off slowly for a while, stopped and continued at normal speed.
How can something get trapped in the doors after they have closed? Shouldn't the sensitive edge have picked this up before we departed? It's not much use suddenly discovering the obstruction half way to Green Park; the poor person trapped in the doors would have been dragged along for miles by then.
A bit like an oversensitive fire alarm that everyone ignores, isn't the risk that the sensitive edge will be ignored and overwritten when something really is getting dragged along by the train?
I have read that a permanent engineering solution is being finalised before roll out across the entire stock. Does anyone know what this is / when it will happen?
|
|
|
|
Post by alfie on May 22, 2012 6:25:33 GMT
Is it not only activated when someone tugs on whatever is trapped in the doors? Obviously only small objects, if it's larger the driver won't get a pilot light.
|
|
|
|
Post by tecchy on May 22, 2012 14:11:16 GMT
Sensitive edge will only activate if the doors are proved locked and closed and the item is pulled from the outside. It is possible to have an activation when in the tunnel as someone could pull the item from inside the train then let go and it will set off the alarm. Still being worked on and perfected.
|
|
|
|
Post by seaeagle on Jun 4, 2012 18:49:33 GMT
Still being worked on and perfected. Not holding my breath for this to happen!!! |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 4, 2012 19:33:28 GMT
Sensitive edge was primarily designed to prevent dragging incidents, but theres been far too many delays because of them. they activate when the doors hav been confirmed locked but they are jarred open when something has been stuk in them and then moved, ie sum ones coat is stuk between the doors wen they close not realiaed it and then when in motion the coact is pulled from the doors. this happens very regularly! A mod is being designed so that the sensitive egde will only activate if and when it is pulled from the outside, but who knows when that will come!!
|
|
Fahad
In memoriam
Posts: 459 
|
Post by Fahad on Jun 4, 2012 22:24:01 GMT
Is it of any use when none of the train is in a station?
|
|
|
|
Post by torquewrench on Jun 5, 2012 6:52:02 GMT
Fahad, obstacle detection serves that purpose for most in-platform occurances. 9 times out of 10 if someone gets something caught in the doors they will immediately pull/tug at it which will set off sensitive edge.
Same can be said for dragging incidents. Clothing gets stuck in the doors, as train pulls away it drags the person - sensitive edge activates and train performs an emergency brake application.
Simples.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 5, 2012 7:03:29 GMT
Is it of any use when none of the train is in a station? No, it is overridden in auto in the same way that the PEAB is when between stations. |
|
Fahad
In memoriam
Posts: 459
|
Post by Fahad on Jun 5, 2012 8:44:31 GMT
Fahad, obstacle detection serves that purpose for most in-platform occurances. 9 times out of 10 if someone gets something caught in the doors they will immediately pull/tug at it which will set off sensitive edge. Same can be said for dragging incidents. Clothing gets stuck in the doors, as train pulls away it drags the person - sensitive edge activates and train performs an emergency brake application. Simples. So there's no reason for trains to brake when the sensitive edge is activated in-tunnel? Is it of any use when none of the train is in a station? No, it is overridden in auto in the same way that the PEAB is when between stations. Does this rely on the driver manually overriding the brake application, or are the brakes simply not applied? |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 5, 2012 11:03:20 GMT
No reason for the train to brake in tunnel. The override is automatic when in ATO mode.
|
|
|
|
Post by torquewrench on Jun 5, 2012 17:09:29 GMT
If you're looking for a more in-depth technical explanation, tecchy is the right person to ask.
|
|
