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CDSRail.
Unit 1, Fulcrum 4,
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Whiteley,
Hants PO15 7FT
UK
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After a disappointing early history, remote monitoring technology of signalling and other trackside assets is now providing real benefits in preventing train delays and reducing the cost of maintenance: there are also some significant safety benefits.
SSI Monitoring (Digital Interlocking)
An SSI works on a (major) cycle – i.e. the time to get round all of the trackside functional modules (TFMs) with command and reply telegrams. This MUST NOT be more than 1 second and although variable with any given SSI it is typically about 0.8 seconds.
During normal use, noise occurs on the signal between telegrams. This noise is reported as ‘Glitches’. There is always a small number of glitches however, if the count becomes excessive they will cause problems. Glitches are associated in time with the nearest command or reply telegram.
CDSRail has worked extensively to develop a proven system that connects with ‘plug-and-play’ technology to the SSI, simultaneously monitoring both the A and B DataLinks.
The CDSRail Monitoring System is plug and play and data is trackable via the AssetWatch central database system.
The system logs and sends alerts direct to the maintainer for the following conditions;
· Command Miss Count: number of missing command telegrams in the last cycle
· Glitch per Cycle: Number of glitches in the last cycle
· Glitches per hour: Number of glitches in the last hour
· Glitches per minute: Number of glitches in the last minute
· Worst TFM Command: Worst TFM with regard to glitches associated with its command telegrams ('64' = all OK). Helps to locate a failing TFM
· Worst TFM Reply: Worst TFM with regard to glitches associated with its reply telegrams ('64' = all OK). Helps to locate a failing TFM
As well as the providing a continuous output of glitch counts, which obviates the need for TERTS, the system does also capture and record the event files to allow play back via AssetWatch trending graphs and mimics.
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