High frequency electronic welding system

A welding system, comprising:

• a work piece fed to a welding point at which a V throat present in said work piece is fuzed into a welded seam;
• a CCD equipped camera for continuously scanning a welding operation and outputting a first signal indicative thereof;
• masking means, interposed between said camera and said welding point for providing a visual reference for dividing a camera image into zones;
• conversion means for receiving an output from said camera and converting said output to a digital for an outputting a second signal indicative thereof;
• first memory means for storing digital welding image data based on said digital signal;
• second momory means for storing reference image data;
• processing means for accessing said first and second memory means and comparing said reference image data with said welding image data and producing a third signal indicative of said comparison;
• monitoring means, receiving said third signal and monitoring a welding condition based thereon, said monitoring means outputting sequentially updated image data based on said third signal for showing a current welding condition and outputting an alarm signal indicative of undesirable welding conditions including upper and lower heat values when said welding condition is excessive of said predetermined conditions;
• display means receiving said sequentially updated image data;
• alarm means receiving said alarm signal;
• correction adjustment means, recieving said third signal and calculating a degree of adjustment of an output power of said welding system based on said third signal and outputting a fourth signal indicative of said degree of adjustment;
• second conversion means, receiving said fourth signal and converting said signal for outputting a fifth, analog signal corresponding to said degree of adjustment;
• signal regulating means, receiving said fifth signal and further receiving a sixth signal indicative of a reference power level, said signal regulating means comparing said fifth and sixth signals and outputting a seventh signal indicative of a power variation value;
• power output means, receiving said seventh signal and adjusting a power level of a heating portion of said welding system;
• a conductive member, positioned in a V throat of a tubular member being welded for establishing an inductive current at said V throat, sufficiently heating a welding point of said tubular member for effecting continuous welding of a seam along said tubular member in accordance with control effected by said image processing portion, said monitoring portion and said power control portion.