An integrated optical sensor for GMAW feedback control
The integrated optical sensor (IOS) is a multifunction feedback control sensor for arc welding, that is computer automated and independent of significant operator interaction. It is based on three major off-the-shelf'' components: a charged coupled device (CCD) camera, a diode laser, and a processing computer. The sensor head is compact and lightweight to avoid interference with weld head mobility, hardened to survive the harsh operating environment, and free of specialized cooling and power requirements. The sensor is positioned behind the GMAW torch and measures weld pool position and width, standoff distance, and postweld centerline cooling rate. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint, thus allowing compensation for such phenomena as arc blow. Sensor stand off distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to infer the final metallurgical state of the weld bead and heat affected zone, thereby providing a means of controlling post weld mechanical properties.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls, ID (United States)
- Sponsoring Organization:
- USDOD; Department of Defense, Washington, DC (United States)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 7069643
- Report Number(s):
- EGG-M-923000; CONF-9206173-7; ON: DE92018019
- Resource Relation:
- Conference: 3. international conference on trends in welding research, Gatlinburg, TN (United States), 1-5 Jun 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ARC WELDING
AUTOMATION
COMPUTERIZED CONTROL SYSTEMS
CALIBRATION
LASERS
OPTICAL SYSTEMS
CONTROL SYSTEMS
FABRICATION
JOINING
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS
WELDING
420200* - Engineering- Facilities
Equipment
& Techniques
360101 - Metals & Alloys- Preparation & Fabrication