Lift door apparatus

Details Lift door apparatus Lift door apparatus

B - Operations, Transporting

66

B

B66B 13/14 (2006.01) B66B 13/26 (2006.01) G06F 15/20 (1990.01)

Patent

CA 2078800

14 LIFT DOOR APPARATUS ABSTRACT Apparatus for controlling a lift door in which a detection zone ( 10) illuminated with an infrared light source (15) and reflected light is received by image sensing means (18). A data processing means (17) is programed to analyse video information store in a video memory (22) and a reference field memory (23) so as to distinguish an object approaching the lift doors (1, 2) from an object passing by the lift, and also distinguishes stationary object in the path of the lift doors (1, 2) from background objects. In a preferred embodiment, a low resolution image sensing means (18) is used and video information is binned and stored in the video memory (22).

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