Anti-collision safety device for a passenger transport system on

Details Anti-collision safety device for a passenger transport system on Anti-collision safety device for a passenger transport system on

1975-01-29

1976-06-22

Blix, Trygve M.

Railway switches and signals

Train dispatching

Central signal control

23515024, 246167D, 246167R, B61L 2704

Patent

active

039647021

ABSTRACT:
An anti-collision safety control for vehicles travelling on tracks; the control comprises two safety loops per vehicle, linked to two common loops in a central control station. Each vehicle loop comprises control circuits for determining the distance to the next preceding vehicle, for determining a safe stopping distance for the vehicle, and for stopping the vehicle if the distance to the preceding vehicle becomes smaller than the safe stopping distance or if there is a failure of a safety circuit. The distance control circuit comprises a detector for detecting reference points provided along the track, a counter for calculating the distance of a vehicle from a given zero location, and a delay circuit for converting this distance into a position signal timed to a synchronization pulse received by all vehicles. Position signals from all vehicles are transmitted to the central control and back to the vehicles; the distance to an immediately preceding vehicle is determined by comparing the position pulses.

REFERENCES:
patent: 3268727 (1966-08-01), Shepard
patent: 3361905 (1968-01-01), Baughman
patent: 3626177 (1971-12-01), Franke
patent: 3819932 (1974-06-01), Aver

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