Axle Counter

Axle Counter

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Description

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An axle counter is a device on a railway that detects the passing of a train in lieu of the more common track circuit. A counting head is installed at each end of the section, and as each axle passes the head at the start of the section, a counter increments. A detection point comprises two independent sensors, therefore the device can detect the direction of a train by the order in which the sensors are passed. As the train passes a similar counting head at the end of the section, the counter decrements. If the net count is evaluated as zero, the section is presumed to be clear for a second train. This is carried out by safety critical computers called 'evaluators' which are centrally located, with the detection points located at the required sites in the field. The detection points are either connected to the evaluator via dedicated copper cable or via a telecommunications transmission system. This allows the detection points to be located significant distances from the evaluator. This is useful when using centralised interlocking equipment but less so when signalling equipment is distributed at the lineside in equipment cabinets.show more

Product details

  • Paperback | 60 pages
  • 152 x 229 x 4mm | 100g
  • Log Press
  • United States
  • English
  • 6135955012
  • 9786135955019