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Title: Integrated optical sensor

An integrated optical sensor for arc welding having multifunction feedback control. The sensor, comprising generally a CCD camera and diode laser, is positioned behind the arc torch for measuring weld pool position and width, standoff distance, and post-weld centerline cooling rate. Computer process information from this sensor is passed to a controlling computer for use in feedback control loops to aid in the control of the welding process. 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. Sensor standoff 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 determine the final metallurgical state of the weld bead and heat affected zone, thereby controlling post-weld mechanical properties.
 [1];  [1];  [1]
  1. (Idaho Falls, ID)
Issue Date:
OSTI Identifier:
EG&G Idaho, Inc. (Idaho Falls, ID) INEEL
Patent Number(s):
US 5275327
Contract Number:
Research Org:
Country of Publication:
United States
integrated; optical; sensor; welding; multifunction; feedback; control; comprising; ccd; camera; diode; laser; positioned; torch; measuring; weld; pool; position; width; standoff; distance; post-weld; centerline; cooling; rate; computer; process; information; passed; controlling; loops; loop; controller; track; relative; joint; contact; tip; base; metal; determine; final; metallurgical; bead; heat; affected; zone; mechanical; properties; weld joint; integrated optical; affected zone; cooling rate; weld bead; welding process; control loop; ccd camera; feedback loop; mechanical properties; feedback control; diode laser; base metal; weld pool; optical sensor; rate information; pool position; integrated optic; heat affected; computer process; /228/219/