Dynamic selection of elevator call assignment scan direction

Details Dynamic selection of elevator call assignment scan direction Dynamic selection of elevator call assignment scan direction

1988-08-31

1989-10-24

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

187127, B66B 118

Patent

active

048755540

ABSTRACT:
A method of assigning hall calls to a plurality of elevator cars (0, 1, N) which biases the assignment process to balance the number of cars serving up and down service directions. Prior to each call assignment update the method determines the number of cars serving each service direction (78, 80, 82). A predetermined relationship (88) between there two numbers is used to determine if up hall calls should be assigned first, or down hall calls (90, 92, 94, 96). The balancing of cars serving the two service directions lowers the average waiting time, and it results in dispersing the cars throughout a building when service subsides, to enable prompt service for newly entered calls without the necessity of moving the cars during periods of low service to be in position for new calls.

REFERENCES:
patent: 3614997 (1971-10-01), Lusti
patent: 3750850 (1973-08-01), Winkler et al.
patent: 3804209 (1974-04-01), Edison
patent: 4029175 (1977-06-01), Winkler
patent: 4037688 (1977-07-01), Winkler
patent: 4401190 (1983-08-01), Bittar
patent: 4463834 (1984-08-01), Polis et al.
patent: 4638889 (1987-01-01), Ludwig et al.

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