Digital selector system for elevators

Details Digital selector system for elevators Digital selector system for elevators

1985-08-05

1987-04-21

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 130

Patent

active

046589350

ABSTRACT:
An elevator system includes a digital selector system with position indicators in the hatch to provide signals indicative of nearest floor and signals when the car is level with a floor. At initiation of a run, the nearest floor is selected as target floor, and target distance, stored as an absolute distance between floors, is retrieved. Target distance is decremented as the car moves, by signals from a pulse generator. At periodic time intervals, ideal velocity is read from an acceleration look-up table, and used, along with the actual instantaneous target distance, to calculate a slowdown profile of velocity and distance for decelerating the car to the contract deceleration rate. The calculated profile is compared with a stored deceleration look-up table to determine critical car distances for making stopping decisions. The target floor and target floor distance advance, at critical car distances, one floor at a time until a stop call is received at a target floor. The instantaneous target distance is corrected during the run responsive to receipt of actual car position signals.

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