US 2006/0232789 A1 · Position referencing system

Abstract

The present invention relates to a position referencing system and method for horizontal or vertical conveyance, e.g., an elevator. The position referencing system includes a plurality of spaced apart color elements or reflectors (42) attached to a static structure (40), such as a door frame in a hoistway or guideway, a light source (12) for illuminating one of the reflectors, and a sensing device (10, 48, 48′) for capturing an image of the illuminated reflector. The image captured by the sensing device is used to determine the position and/or speed of the conveyance, e.g., an elevator car.

Claims23

Dependent claims

A position referencing system comprising:

a plurality of spaced apart color elements attached to a static structure;
means attached to a movable structure for detecting one of said spaced apart color elements;
and
means for determining a position of said movable structure from said detected color element.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/541,229Filed 30 Dec 2002

Published

19 Oct 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

B66B 1/3492
Details , e.g. call counting devices, data transmission from car to control system, devices giving information to the control system: position or…
G01D 5/28
Characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light: with deflection of beams of light, e.g. for direct…
G01D 5/305
The beams of light being detected by photocells: controlling the movement of a following part
G01P 3/68
Devices characterised by the determination of the time taken to traverse a fixed distance: using optical means, i.e. using infrared, visible, or…

Position referencing system

Life of this patent

Position referencing system

Life of this patent

Abstract

Claims23