Elevator system

Details Elevator system Elevator system

1983-10-21

1985-11-26

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

187 29R, 358107, H04N 718

Patent

active

045557241

ABSTRACT:
Apparatus and methods for determining the load in an elevator car, including the preparation of a video image of the car which has a predetermined number of picture elements (pixels). The gray scale level of each pixel is determined and compared with a reference value related to the gray scale level of the same pixels when the elevator car is unloaded. Those pixels whose gray levels have a predetermined relationship with the predetermined reference value are considered "loaded" pixels and the number of such loaded pixels is compared with the total number of pixels to obtain an indication of car load.

REFERENCES:
patent: 2602524 (1952-07-01), Shirley
patent: 3641263 (1972-02-01), Rhoads
patent: 3971885 (1976-07-01), Kito
patent: 3999631 (1976-12-01), Iwasaka
patent: 4047205 (1977-09-01), Grosskopf
patent: 4303851 (1981-12-01), Mottier
patent: 4473133 (1984-09-01), Enriquez

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