Template-matching adaptive control system for welding
US4491718A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1982 |
| Grant date | Jan 1, 1985 |
| Priority date | — |
| Expiry date | May 20, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/0216
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A template-matching adaptive control system for welding comprising noncontacting means for sensing the lateral profile of a weld joint while the welding electrode moves laterally across the joint, means for comparing the sensed lateral profile to a predetermined reference profile or "template", and means for adjusting a welding parameter, such as the center of oscillation for tracking, the width of oscillation, and constant fill control, in response to the results of the comparison. The comparison between the sensed lateral profile and the template is based upon a mathematical criterion of the degree of match therebetween. One disclosed embodiment performs control based upon finding the closest match between the sensed lateral profile and a plurality of different templates. Another embodiment performs control by making adjustments related to the value of the mathematical criterion. The disclosed embodiments employ programmed microprocessers to accomplish the template matching. The system can adapt to changes in direction of the weld seam as well as changes in the width and shape of the profile of the weld seam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.