1. A delay can be built into the circuit or into computer logic down-
stream of the detector to hold the indication for a time to allow
the next car to move into position. When the train has finally
passed, this delay will time-out and give the clear indication.
2. A strictly mechanical method to address the problem is indi-
cated in [1-B]. The source/detector pair is set across the rails at
an angle such that the largest gap between cars will not expose
the detector. Setting up the source/detector pairs in this way
avoids any further electronic or software complications.
2
2. The Ambient Light Optical Train Detector.
Optical Train Detection - 3
MRH-May 2014
