US 4,947,965 A · Group-control method and apparatus for an elevator system with plural cages

Abstract

In a group-control for an elevator system with plural elevator cages, when a hall call is generated, evaluation values of all of group-controlled cages with respect to the generated hall call are calculated by a predetermined evaluation function, as expressed by the following formula: .phi..sub.n =(WT-k.sub.p Z.sub.p +k.sub.c T.sub.c +k.sub.L L.sub.L -K.sub.z Z.sub.Z -k.sub.s Z.sub.s).sub.n n=1, 2, . . ., N wherein N denotes the total number of group-controlled elevator cages, WT, Z.sub.p, T.sub.c, L.sub.L, and Z.sub.s represent evaluation indexes of a waiting time, an equal time-interval operation preferential zone, a riding time, a cage-load factor, a first-arriving cage preferential zone and a stop call, and k.sub.p, k.sub.c, k.sub.L, k.sub.z and k.sub.s represent control parameters for the last five of the evaluation indexes above, respectively. The generated hall call is allotted to a cage having a minimal evaluation value calculated by the aforesaid evaluation function. The control parameters are selected and set at appropriate values in accordance with a manner of use of a building installed with the elevator system.

Claims17

Dependent claims

A group-control method for an elevator system with plural elevator cages serving plural floors, in which when a hall call is generated, evaluation values of all of group-controlled cages with respect to the generated hall call are calculated by a predetermined evaluation function and the generated hall call is allotted to an adaptive cage, which has the most desired one of the calculated evaluation values,

c h a r a c t e r i z e d in
that there is established in accordance with a position of a cage such a first floor zone for the cage that a hall call generated within the zone is to be preferentially allotted to the cage, and
that the evaluation function includes evaluation indexes of at least two control items of a waiting time and the first zone.

A group-control apparatus for an elevator system with plural elevator cages serving plural floors, comprising:

a first processor, provided with an input device and a display device, which executes the processing operation for determining a group-control method and various control parameters used in the group-control method, which are most suited for a manner of use of a building installed with the elevator system;
a second processor, coupled to said first processor, which executes the processing operation for group-control of the plural cages, in which evaluation values of all of group-controlled cages with respect to a generated hall call are calculated in accordance with an evaluation function defined by the group-control method and the control parameters determined by said first processor and the generated hall call is allotted to an adaptive cage, which has the most desired one among the calculated evaluation values;
and
third processor, provided for every elevator cage and all coupled to said second processor, for controlling the service operation of the respective elevator cages in accordance with a result of the group-control processing by said second processor,
c h a r a c t e r i z e d in that
the evaluation function includes evaluation indexes for control items of a waiting time taking account of an equal interval operation, a riding time, a cage-load factor, a rate of first-arriving cages and a stop call with control parameters functioning as weight coefficients for the respective control items, and said first processor determines the most suitable form of the evaluation function by selecting the control parameters and their values through the input device.

3 more elements

Dependencies are inferred from the claim text.

Group-control method and apparatus for an elevator system with plural cages

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Group-control method and apparatus for an elevator system with plural cages

Life of this patent

Abstract

Claims17