Transit car door system and operation

Details Transit car door system and operation Transit car door system and operation

1992-03-27

1993-07-13

Le, Mark T.

Railway rolling stock

Special car bodies

Passenger

318480, B60N 500

Patent

active

052263703

ABSTRACT:
A computer assisted transit car door operating system for augmented automation of transit car door panel operation while providing safety provisions to restrain rail movement unless all passage doorways are closed. A programmable logic controller generates a sequence initiating (opening or closing) signal for a door panel; or, a manual input signal can be introduced for such purpose. The controller receives signals from a panel position sensor and a panel movement sensor to evaluate door panel status and generate status indication and panel movement signals. Automated control of door panel movement is selectively directed to a doorway, or doorways, at which an opening or closing problem is being encountered; that is, the exclusion of door panel movement signals to properly operated door panels. An electrical cam device utilizes a radiant energy emitter and detector with a reversible-direction, coded attenuator, keyed to a reversible-direction motor drive for a door panel; modulating output of such radiant energy detector indicates direction of movement and other data by coordination with the controller. An electrically controlled power regulator controls connection of a source of DC power to control direction of rotation of a reversible-rotation DC motor controlling opening and closing of door panel.

REFERENCES:
patent: 3239741 (1966-03-01), Rank
patent: 3510742 (1970-05-01), Pooley
patent: 4460857 (1984-07-01), Michaelis
patent: 4511797 (1985-04-01), Pohlig et al.
patent: 4698567 (1987-10-01), Gottwald et al.
patent: 4816728 (1989-03-01), Kurakake
patent: 5065081 (1991-11-01), Shah

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