Elevator door control responsive to obstructions

Details Elevator door control responsive to obstructions Elevator door control responsive to obstructions

1990-11-16

1992-11-10

Wysocki, A. Jonathan

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318282, 318463, 187103, H02P 300

Patent

active

051627116

ABSTRACT:
An apparatus and a method for protecting against a person being caught in a closing automatic door provides constant force values up to the few last millimeters of a door closing movement. A regulating error or difference signal representing the difference between the desired door motor speed and the actual motor speed is generated during the door closing travel and is continuously compared with a maximum predetermined tolerance signal produced by a target value generator and a door stop with subsequent reversing is initated if the tolerance value is exceeded. A learning travel computer, during periodic learning travels, determines values for mass compensation and for friction compensation and adds these values to generate a compensation signal which is added to the difference signal as an input to a regulator for controlling the door motor through an electronic switching system. Thus, the response values for stopping and reversing of the door remain constant even though the characteristics of the door operating apparatus may change.

REFERENCES:
patent: 3891064 (1975-06-01), Clark
patent: 3977497 (1976-08-01), McMurray
patent: 4085823 (1978-04-01), Caputo et al.
patent: 4300663 (1981-11-01), Hmelovsky et al.
patent: 4367810 (1983-01-01), Doane et al.
patent: 4501343 (1985-02-01), Salihi
patent: 4776433 (1988-10-01), Lagree et al.
patent: 4794309 (1988-12-01), Saito et al.
patent: 4804067 (1989-02-01), Kahkipuro
patent: 4898263 (1990-02-01), Manske et al.
patent: 4980618 (1990-12-01), Milnes et al.

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