Train motion detection apparatus
First Claim
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1. A monitoring system for detecting when any of one or more trains operating in a transit system is not moving along the system track as desired, the system track being divided into successive track signal blocks each having means for generating a signal indicating whether a train is occupying any portion of the signal block, said monitoring system comprising:
- computer means for storing the respective occupancy signals for the track blocks;
said computer means periodically comparing new and past occupancy signal values for the track blocks to indicate occupancy changes;
means for resetting an alarm timer for each block occupancy change;
means for enabling each running timer to continue operation if no occupancy change has occurred in the block to which the timer corresponds; and
means for generating a system operator alarm when any running timer reaches a present time limit to indicate a no-motion train condition requiring system level supervisory action.
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Abstract
An apparatus and method is provided for determining when a train operating in a transit system is not moving along a provided travel path in accordance with the sensed actual occupancy time of a track signal block by that train in relation to a desired occupancy time in that track signal block by that train.
92 Citations
3 Claims
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1. A monitoring system for detecting when any of one or more trains operating in a transit system is not moving along the system track as desired, the system track being divided into successive track signal blocks each having means for generating a signal indicating whether a train is occupying any portion of the signal block, said monitoring system comprising:
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computer means for storing the respective occupancy signals for the track blocks; said computer means periodically comparing new and past occupancy signal values for the track blocks to indicate occupancy changes; means for resetting an alarm timer for each block occupancy change; means for enabling each running timer to continue operation if no occupancy change has occurred in the block to which the timer corresponds; and means for generating a system operator alarm when any running timer reaches a present time limit to indicate a no-motion train condition requiring system level supervisory action. - View Dependent Claims (2, 3)
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Specification