Dynamic assignment switching in the dispatching of elevator cars

Details Dynamic assignment switching in the dispatching of elevator cars Dynamic assignment switching in the dispatching of elevator cars

1988-03-16

1988-12-27

Shoop, Jr., William M.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 118

Patent

active

047934433

ABSTRACT:
A method for assigning hall calls to a plurality of elevator cars on the basis of the estimating the time of arrival (ETA) of each elevator car at the floor of the hall call to be assigned. A new hall call is assigned to the car having the lowest ETA. A previously assigned hall call is reassigned to a car having a lower ETA than the car presently assigned to serve the call when the lower ETA is lower by a value T. The average call waiting time (AWT) is calculated using a selected period of time to tabulate the number of calls and cumulative call waiting time, and this calculated value is compared with the desired AWT for the elevator system. The value of T is changed when the calculated and desired values of ETA have a predetermined relationship.

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