2013 Fiscal Year Final Research Report
3D temperature measurement of axially asymmetrical welding arc plasma by image reconstruction method
| Project/Area Number |
24760600
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Material processing/treatments
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| Research Institution | Osaka University |
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Principal Investigator |
NOMURA Kazufumi 大阪大学, 工学(系)研究科(研究院), 助教 (90397729)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | アークプラズマ / 溶接 / 分光計測 / 非軸対称 / 非定常 / 干渉フィルタ / CCDカメラ |
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| Research Abstract |
The aim of this study is measure the 3D temperature distribution of axially asymmetrical welding arc plasma. This requires spectroscopic method, multidirectional measurement and tomographic technique with image reconstruction. First, we employed the optical rotational system by one CCD camera and improved the equipment through the evaluation of the appropriate detection directions and numbers. Two TIG electrode arc was measured by this system. Second, we constructed the simultaneous and multidirectional measurement system was constructed to measure the axially asymmetric and non-steady state plasma. To ensure the correct measurement using multi detectors and the interference filters, the calibrations were conducted involving the adjustment of the central wavelength through the filter. We could perform the temperature measurement of the transient and asymmetrical TIG arc plasma such as in the transition period between the peak and base current of the pulsed TIG arc with tilted torch.
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