Temperature measurement of asymmetrical pulsed TIG arc plasma by multidirectional monochromatic imaging method
Temperature measurement of asymmetrical pulsed TIG arc plasma by multidirectional monochromatic imaging method
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DOI：
10.1007/s40194-014-0211-2
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发表时间：
2015-03
影响因子：
2.1
通讯作者：
K. Nomura;Takashi Kishi;K. Shirai;Y. Hirata;Kotaro Kataoka
中科院分区：
文献类型：
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作者：
K. Nomura;Takashi Kishi;K. Shirai;Y. Hirata;Kotaro Kataoka
通过光谱进行的电弧等离子体诊断通常用于测量电弧特性，例如温度。轴向不对称电弧等离子体的测量需要光学计算机断层扫描技术。本研究采用单色成像方法，构建了由六套CCD相机和干涉滤光片同时、多方向的测量系统。通过倾斜操作校准滤光片中心波长的偏差，并通过参考静止轴对称钨极惰性气体（TIG）电弧等离子体校准探测器的灵敏度。我们可以对瞬态和不对称 TIG 电弧等离子体进行温度测量，例如使用 30° 倾斜焊炬的 50 Hz 脉冲 TIG 电弧的峰值 150 A 和基本 10 A 电流之间的过渡期。结果表明，30°倾斜电弧的高温区域比垂直电弧的高温区域大。脉冲电弧和连续电弧的比较表明，只要变化率约为-113 A/ms，电弧形状和温度变化就会合理地跟随电流变化。
Arc plasma diagnostics by spectroscopy have been often used to measure the arc properties, such as the temperature. Measurements of an axially asymmetrical arc plasma require the optical computed tomography technique. This study constructed the simultaneous and multidirectional measurement system by six sets of CCD camera and interference filter with monochromatic imaging method. The deviation of the central wavelength of the filters was calibrated by tilting operation, and the sensitivity of detectors was calibrated by referencing the stationary and axially symmetric tungsten inert gas (TIG) arc plasma. We could perform the temperature measurement of the transient and asymmetrical TIG arc plasma such as in the transition period between the peak 150 A and base 10 A current of a 50 Hz pulsed TIG arc with 30° tilted torch. It was revealed that the high-temperature area of 30° tilted arc is larger than that of perpendicular arc. The comparison of pulsed and continuous arcs shows that the arc shape and the temperature variation reasonably followed the current change as long as the changing rate was about −113 A/ms.