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Arc spectral information is a rising information source which can solve many problems thatcan not be done with arc electric information and other arc information. It is of important signficanceto develop automatic control technique of welding process. The basic theory and methods on it play animportant role in expounding and applying arc spectral information. Using concemed equation inplasma physics and spectrum theory a system of equations including 12 equations which serve as basictheory of arc spectral information is set up. Through analyzing of the 12 equations, a basic view thatarc spectral information is the reflection of arc state and state variation, and is the most abundant in-formation resource reflecting welding arc process is drawn. Furthermore, based on the basic theory thebasic methods of test and control of arc spectral information and points out some applications of it arediscussesed.
Arc spectral information is a rising information source which can solve many problems thatcan not be done with arc electric information and other arc information. It is of important signficanceto develop an automatic control technique of welding process. The basic theory and methods on it play animportant role in Expounding and applying arc spectral information. Using concemed equation in plasma physics and spectrum theory a system of equations including 12 equations which serve as basictheory of arc spectral information is set up. of the arc state and state variation, and the most abundant in-formation resource of the refinishing arc arc process information;