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Post by tom2506 on Feb 23, 2006 21:19:29 GMT
What is used to set the codes and can they be set in any location?
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towerman
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Post by towerman on Feb 23, 2006 21:54:15 GMT
As far as the Victoria Line is concerned,the codes come from a code generator which is basically a pendelum going back and forth.Different speeds of the pendelum give the different codes ie:120,180,270 and 420.Code generators are found in IMR's and SER's.
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Post by tom2506 on Feb 23, 2006 22:01:42 GMT
what about stoping the trains at stations, is there codes set down the platform?
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Post by Deleted on Feb 23, 2006 23:14:10 GMT
Er - what are IMR's and SER's?
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Post by tom2506 on Feb 23, 2006 23:20:32 GMT
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Post by Deleted on Feb 24, 2006 0:00:39 GMT
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towerman
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Post by towerman on Feb 24, 2006 1:35:39 GMT
Station stopping is done by command spots which are short sections of "code" down the length of the platform,it works on the principle of 1kc=10mph,so you start off with say a 4.5kc command at start of platform then 4kc,3.5 kc,3kc and so on down to about 10mph when the pressure switch brake takes over to bring train to a stand.The train compares what speed it is doing with what speed it should be doing and increases or decreases the braking rate accordingly,then you go into the realms of minimum,normal and maximum retarders and it starts to get complicated.To think I did a month at White City on the trains and ATO all for an extra 10/- a week!!!
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Post by Colin D on Feb 24, 2006 13:25:57 GMT
Can a broken rail be detected by ATO commands the simular way that conventional signaling system would pick it up?
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towerman
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Post by towerman on Feb 24, 2006 20:50:24 GMT
The track would fail to pick up,same as a conventional line.
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Post by Deleted on Feb 27, 2006 18:26:49 GMT
not necessary we found most cracks are around blockjoints or fishplates and as fishplates are bonded put and blockjoints are electricly isolated this does not put the track down
and btw a 120 code the train does not reckonise so it sees it as a track down
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