Microvector control for edge and joint following

Details Microvector control for edge and joint following Microvector control for edge and joint following

1983-03-07

1985-09-17

Shaw, Clifford C.

Electric heating

Metal heating

By arc

901 9, 901 42, 901 47, B23K 912

Patent

active

045422796

ABSTRACT:
An industrial robot is controlled to move by increments and approximately track an edge or a joint. A structured light pattern such as two parallel light bars is projected onto the workpiece and the scene is imaged by a visual sensor. Information derived from the image is used to compute move vectors. The navigation algorithm is based on extracting and computing the next move vector from the visual scene while the current move vector is being executed. The positioning system of an arc welding robot approximately follows the joint to be welded; the computed microvectors specify the direction and distance the positioning system moves.

REFERENCES:
patent: 3918622 (1975-11-01), Larsen
patent: 4021840 (1977-05-01), Ellsworth et al.
patent: 4328416 (1982-05-01), Dudley et al.
patent: 4359624 (1982-11-01), Wascat
patent: 4409650 (1983-10-01), Noguchi
patent: 4412121 (1983-10-01), Kremers et al.

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