Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – With means to control the operation of the section
Patent
1994-09-20
1996-10-15
Downs, Robert W.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
With means to control the operation of the section
198321, 395 61, 395900, 104 20, B65G 1500, G06F 1700, B61K 100
Patent
active
055645500
ABSTRACT:
In one embodiment, fuzzy sets indicative of the degree to which the time since the last passenger boarded an escalator can be deemed to be zero, a very long time, or something in between, are combined with fuzzy sets indicative of the extent to which the maximum number of passengers in a recent temporal or cyclic period can be deemed to be a zero passenger, a very large group, or something in between. In another embodiment, fuzzy sets indicative of the degree to which the time since the last passenger exited an empty escalator can be deemed to be nearly zero, a very long time, or something in between, are combined with fuzzy sets indicative of the degree to which the maximum group of passengers on the escalator at any time since the last time it was empty can be deemed to be a single passenger, a very large group, or something in between. T-norms (functions for combining the pair of fuzzy sets) are used to select recommended target speeds; weighted averaging of more than one recommended target speed is used to defuzzify the result to achieve an ultimate target speed, except in the second embodiment, which tailors the speed of the escalator to the current traffic level where the target speed is always maximum if the escalator is occupied and which judiciously slows an empty escalator.
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Bittar Joseph
Powell Bruce A.
Sirag, Jr. David J.
van Rooy Jean-Pierre
Downs Robert W.
Katbab A.
Otis Elevator Company
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