Method and apparatus for real-time control of laser processing o

Boots – shoes – and leggings

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

395900, 395904, 2191216, G06F 1900

Patent

active

055174205

ABSTRACT:
There is provided a method and apparatus for controlling, in real-time, processing variables in laser processing of materials using fuzzy logic control procedures by embedding expertise in the form of a rule base within a fuzzy logic controller. The method uses a visible light detector as part of the control loop to detect light from the laser-material interaction zone. The light is processed to extract spatial information on the size of the interaction zone and in one aspect determines the number of bright pixels above a pre-defined number which effectively gives the spatial extent or area of the visible light emitted from the interaction zone. From this elemental processing two system input variables are obtained, namely the current number of bright pixels, #BP, and the change in this count since the last calculation, .DELTA.BP. These Input variables are input to the fuzzy logic controller for an inference pass with the output being used to control a laser processing variable such as laser power, laser intensity and process speed. More than two system input variables may be used to provide greater stability, integrating the fuzzy logic controller with the image processor provides control of penetration welding of steel plate at a rate of 28 Hz.

REFERENCES:
patent: 5304768 (1994-04-01), Ishizaka
Sensing of the Weld Pool Depth with Neural Network and Fuzzy Control of Seam Tracking; Yasuyoshi Kaneko, Tatsuya Iisaka, Akihisa Tanaka, Peijun Ma, Satoshi Yamane and Kenji Ohshima; pp. 424-429; Proceedings of the IECON'93; International Conference on Industrial Electronics, Control, and Instrumentation; vol. 1, Plenary Session, Emerging Technologies, and Factory Automation, Nov. 15-18, 1993.
Fuzzy Seam-Tracking Controller; Yoshito Sameda; pp. 966-970, vol. 2; 1992 International Conference on Industrial Electronics, Control, Instrumentation, and Automation; Nov. 9-13, 1992; Marriot Mission Valley/SanDiego, USA.
Synchronized Laser-video Camera System Study of High Power Laser Material Interactions; P. E. Denney and E. A. Metzbower; The International Society for Optical Engineering; SPIE Vol. 1722; ICALEO (1991); pp. 84-93; Nov. 3-8, 1991, San Jose Convention Center, San Jose, California.
Laser Process Monitoring with Dual Wavelength Optical Sensors; H. B. Chen, L. Li, D. J. Brookfield, K. Williams and W. M. Steen; Department of Mechanical Engineering University of Liverpool, Liverpool L69 3BX U.K.: ICALEO (1991): SPIE vol. 1722: pp. 113-122; Nov. 3-8, 1991, San Jose Convention Center, San Jose, California.
Intelligent Laser Welding Control; F. F. Farson, K. S. Fang, J. Kern: Applied Research Laboratory, The Pennsylvania State University State College , Pennsylvania USA; The International Society for Optical Engineering; SPIE vol. 1722; pp. 104-112; Nov. 3-8, 1991, San Jose Convention Center, San Jose, California.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and apparatus for real-time control of laser processing o does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for real-time control of laser processing o, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for real-time control of laser processing o will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1901496

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.