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 1987 - March - Luber - Track-Clear Indication by Axle Counting |
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B. LuberSiemens Ltd.The best-known, and even today, the most widely-used method of track-clear indicating, are track circuits in their various forms. However, shortly after the introduction, it became obvious that tract circuits were not always suitable. To quote two examples: if physical requirements can not be met, whic is the case when it is not possible to insulate the rails, or if the track section to be monitored is very long or difficult to reach - an uneconomical solution. To find an alternative method, based on axle counting, was the aim of Siemens as long ago as 1935. The system which has been developed is based on axle counting-in at one end of the track section and axle counting-out at the other end of this section. When both counts correspond, the track section concerned is indicated as being clear.
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