B - Operations – Transporting – 61 – L
Patent
B - Operations, Transporting
61
L
346/61
B61L 3/20 (2006.01) B61C 17/12 (2006.01) B61L 3/00 (2006.01) G06F 11/00 (2006.01)
Patent
CA 2001081
A vital microprocessor-based rate decoder for use in a vital processing system in on-board main line railroad and rapid transit automatic train protection systems; the design is such that a method is incorporated for tolerating specific kinds of signal disruption and in such a way that the probability of a wrongside failure has a calculable upper bound. A pickup coil transmits external or wayside signals to an arrangement which involves two channels and which provides period and duty cycle measurement of the pulses resulting from demodulation of the external signals. A counter is employed in each of the channels and a tolerance accumulation rate decoding device is included, the maximum amount of tolerance accumulated, and the minimum time required to accumulate it, being functions of the rate code selected.
Borden Ladner Gervais Llp
General Signal Corporation
Sasib S.p.a.
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