Elevator system having microprocessor-based door operator
AssigneeDelaware Capital Formation, Inc.
InventorsDennis J. Farrar, Mark H. Duckworth
Life of this patent
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Abstract
An elevator system has a door operator with a door operator motor and a dedicated microprocessor for storing door open and door close cycles. The microprocessor initiates door open and close cycles responsive to external door open and door close commands. Preferably the microprocessor stores a plurality of door closed cycles in which the elevator controller selects one of the cycles when issuing a door closed command.
Claims9
An elevator system having a car with a door moveable between open and closed positions, a drive means for raising and lowering the car, a processor control means for actuating said drive means for moving the car between landings and for stopping the car at landings, and for issuing door open and door closed commands, and a door operator means comprising:
- a door drive means coupled to said door for opening and closing the door;
- position indicating means representative of door open limit DOL and door closed limit DCL;
- obstruction detecting means;
- sensor means for generating travel distance signals representative of distance of door travel;
- and
- microprocessor means coupled to said processor control means for controlling said door drive means including
- (a) means for generating speed control signals for controlling the speed of said door drive means;
- (b) programmable means for storing travel distance value between open and closed positions of the door;
- (c) programmable means for storing maximum door speed, travel-in speed, slowdown distance, and travel-in distance for both a door open cycle and a door closed cycle;
- (d) means responsive to a door open or close command from said processor control means for executing a door opening or closing cycle, wherein each cycle includes programmed command for:
- (i) activating said door drive means up to said maximum door speed;
- (ii) calculating instantaneous door position responsive to said stored travel distance and said travel distance signals;
- (iii) slowing down said door drive means at a pre-selected rate responsive to reaching said slowdown distance;
- (iv) operating said drive means at said travel-in speed responsive to reaching said travel in-distance;
- (v) stopping said door upon detecting DOL or DCL;
- and
- (vi) wherein said door closed cycle further includes an interrupt means responsive to said obstruction detecting means for stopping said drive means;
- and
- wherein said microprocessor means further includes a first interrupt cycle for re-opening the door responsive to said obstruction detecting means;
- a second interrupt cycle for stopping, but not fully re-opening the door, responsive to said obstruction detecting means, and a third interrupt cycle for overriding at least one obstruction detecting means and actuating said drive means for urging said door closed;
- and wherein said processor control means comprises means for selecting, in conjunction with issuing door closed commands, the first, second, or third interrupt cycle for closing the door.
A elevator system having a car with a door moveable between open and closed positions, a drive means for raising and lowering the car, a processor control means for actuating said drive means for moving the car between landings and for stopping the car at landings, and for issuing door open and door closed commands, and a door operator means comprising:
- a door drive means coupled to said door for opening and closing the door;
- position indicating means representative of door open limit DOL and door closed limit DCL;
- obstruction detecting means;
- sensor means for generating travel distance signals representative of distance of door travel;
- microprocessor means for controlling said door drive means;
- a serial communications link coupling said microprocessor means and said processor control means;
- and
- at least one diagnostic terminal connector, for an external diagnostic/programming device, connected to said communications link;
- wherein said microprocessor means comprises:
- (a) means for generating speed control signals for controlling the speed of said door drive means;
- (b) programmable means for storing travel distance value between open and closed positions of the door;
- (c) programmable means for selectively receiving from said diagnostic terminal connector, and for storing, maximum door speed, travel-in speed, slowdown distance, and travel-in distance for both a door open cycle and a door closed cycle;
- (d) means responsive to a door open or close command from said processor control means for executing a door opening or closing cycle, wherein each cycle includes programmed commands for:
- (i) activating said door drive means up to said maximum speed;
- (ii) calculating instantaneous door position responsive to said stored travel distance and said travel distance signals;
- (iii) slowing down said drive means at a pre-selected rate responsible to reaching said slowdown distance;
- (iv) operating said drive means at said travel-in speed responsive to reaching said travel in-distance;
- (v) stopping said door upon detecting DOL or DCL;
- and
- (vi) wherein said door closed cycle further includes an interrupt means responsive to said obstruction detecting means for stopping said drive means.
Dependencies are inferred from the claim text.