Abstract: This paper presents a new
method on the principle of absolute spectral line intensity. In
this method a supernarrow band-pass filter is used instead of a
spectromter, arc images taken by infrared image technique are
fed into a computer through A/D interface to be processed, then
physical characteristics such as temperature field and
conductivity of the TIG welding arc plasma are obtained. The
temperature field and rediation intensity distribution of TIG
welding arc plasma are displayed on a color screen after being
pesudocolored. The whole measurement is completed by a computer.
It takes only two seconds to obtain all the information.
Experiments show that this method is fast and simple, correct
and visual. It helps to make real-time measurement and control
of arc. It opens up a new way to the development of new welding
technique and equipment.
Key words:
Arc
plasma Infrared photography technique Microcomputer image
processing
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