华中科技大学学报（自然科学版）2011，Vol.39Issue(1)：54-57,4.
液相/粉末等离子射流形态特征可视化分析
Visualization of morphologic characteristics of powder/liquid plasma spray jets
摘要
Abstract
The axial ratio of the ellipse with same normalized second-order central moments was takend as the eigenvalue of plasma spray jet morphologic characteristic. The method that reflects the jet temperature, velocity and related process parameters using the eigenvalue was developed. In the experiment, the computer vision and image processing technology was used to study the relationship between eigenvalues and the powder and the newly emerging liquid plasma spray process parameters.The result indicates that with the spraying power increases, the jet eigenvalues become greater. But the liquid spray jet eigenvalue was less than the powder spray. With the Ar gas flow rate increases,the jet eigenvalues don't increase but decrease. Based on it, the relationship between jet eigenvalues and spray process energy parameters was found, which can provide firm basis for the forming quality online predict and control.关键词
液相/粉末等离子/熔射/射流/计算机视觉/图像处理/工艺参数/标准化相同二阶中心矩椭圆/特征值Key words
powder/liquid plasma/ spray/ jet/ computer vision/ image processing/ process parameters/ the ellipse with same normalized second-order central moments/ eigenvalues分类
信息技术与安全科学引用本文复制引用
张海鸥,于洋,王桂兰,芮道满..液相/粉末等离子射流形态特征可视化分析[J].华中科技大学学报（自然科学版）,2011,39(1):54-57,4.基金项目
国家高技术研究发展计划资助项目(2007AA04Z142) （2007AA04Z142）
国家自然科学基金资助项目(50474053). （50474053）
