Position controlled elevator door motion

Details Position controlled elevator door motion Position controlled elevator door motion

1979-12-27

1981-11-10

Moses, R. L.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 31, 318266, B66B 1308

Patent

active

042993083

ABSTRACT:
An elevator employing a microprocessor-based cab controller, for controlling, among other things, the opening and closing of the elevator car door, provides a pair of dictated door velocity profile signals and selects the one having the lesser value, to dictate motor current in accordance with the selected desired door motion profile. A first one of the profiles includes acceleration up to a desired maximum velocity, and a second one of the door motion profiles consists of a deceleration profile generated as a function of the distance from the door to a desired target position. An exemplary elevator system and cab controller, along with an exemplary door control program for the cab controller, establishing an environment in which the invention may suitably be practiced, and detailed program steps for effecting the present invention in such an environment are disclosed.

REFERENCES:
patent: 3376486 (1968-04-01), Caputo
patent: 3552524 (1971-01-01), Benjamin et al.
patent: 3627080 (1971-12-01), Yuminaka et al.
patent: 3670851 (1972-06-01), Shima
patent: 3673482 (1972-06-01), Davey
patent: 3729668 (1973-04-01), Brette

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