Machine vision system for position sensing

Details Machine vision system for position sensing Machine vision system for position sensing

1988-06-02

1990-01-02

MacDonald, Allen

Boots, shoes, and leggings

364190, 901 2, 901 30, G06F 1546

Patent

active

048917672

ABSTRACT:
The video image of the end effector (26) and work surface (32) in the vicinity of the end effector is converted into a series of continually generated digitized images (132), which are further processed to detect and track the relative motion between the end effector and the work surface. After calibration (126), whereby an index of coordinates and arm orientation is established for a known positioning of the end effector relative to a known reference feature (28a) on the work surface, the tracking (168) of the motion of the end effector is utilized to continually update the index (104) to indicate the actual coordinate and orientation of the end effector relative to the work surface. The updated index is displayed on a live video monitor (44), and can be used as input to the feedback circuit (94) of the manipulator control system. In another embodiment of the invention, a high resolution monitor (52) displays an image of substantially the entire work surface, and particularly the features of interest, in the nature of a work surface map, and superimposes thereon a visual indication of the location, orientation and movement of the end effector, using the updated index information.

REFERENCES:
patent: 4347652 (1982-09-01), Cooper, Jr. et al.
patent: 4488242 (1984-12-01), Tabata et al.
patent: 4503506 (1985-03-01), Sturges, Jr.
patent: 4576546 (1986-03-01), Cooper, Jr. et al.
patent: 4831549 (1989-05-01), Red et al.
Article, Wang et al., "Robot Motion Control", AI Expert, Dec. 1987, pp. 26-32.

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