| 摘要 |
An elevator system for a multistory structure having a plurality of elevator shafts is shown which includes at least one independently movable elevator car in each elevator shaft. A digital computer with memory is used to control elevator cars including the dispatch of cars from terminal floors. A daily control parameter table in memory identifies a plurality of different methods of scheduling dispatch of elevator cars from terminal floors, groups of floors to be serviced by each elevator car, and cars in a shaft to be coupled for tandem operation. The memory is periodically read for selecting for each elevator car one of said methods of scheduling dispatch and for identifying the group of floors to be serviced by the cars. The selected method of scheduling the dispatch of cars is implemented and cars are limited to servicing the selected group of floors. One method of scheduling dispatch includes obtaining a measure of estimated passenger demand for travel in one direction that is incapable of being met by cars currently in service. A passenger loading threshold limit for travel in the one direction is selected which may range from zero to maximum capacity of the elevator car to be dispatched. When the measure of estimated passenger demand for travel in the one direction that is incapable of being met by cars currently in service equals the passenger loading threshold limit a car dispatch signal is issued for dispatch of a car from the terminal floor. Where a plurality of independently-operated cars are included in a hoistway, operation in either a coupled or decoupled manner is provided.
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