基于图像处理的喷涂雾锥角影响因素分析  

Image processing analyses of the factors influencing the angle of an atomizer spray cone

作　　者：张思敏 王国磊[2] 于乾坤 华宵桐 宋立滨[1] 陈恳[1] ZHANG Simin;WANG Guolei;YU Qiankun;HUA Xiaotong;SONG Libin;CHEN Ken(Department of Mechanical Engineering, Tsinghua University,Beijing 100084,China;State Key Laboratory of Trihology,Tsinghua University, Beijing 100084,China)

机构地区：[1]清华大学机械工程系,北京100084 [2]清华大学摩擦学国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2019年第2期103-110,共8页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(61403226);摩擦学国家重点实验室项目(SKLT2015D04)

摘　　要：研究喷涂工艺参数与雾锥角的关系可为建立准确喷枪模型提供重要依据,但传统的直接测量喷幅尺寸的实验方法很难获取足够的实验数据。为了解决这个问题,该文提出并实现了一种雾锥角测定方法,通过截取雾锥图像的特定边界计算雾锥角。基于该方法,对控型空气压力、雾化空气压力和涂料流量与雾锥角的关系进行了系统的实验研究,通过分析发现如下规律:扇形空气压力与长轴雾锥角正相关,与扇形空气压力负相关;雾化空气压力与长短轴雾锥角、喷涂流量均正相关,且与扇形空气压力之间存在耦合关系;喷涂流量对雾锥角影响相对较小。The relationship between the spray process parameters and the atomizer spray cone angle must be well understood for establishing accurate spray gun models. However,traditional experimental methods cannot easily provide sufficient experimental data,such as measurements of the spray pattern size.This paper presents a method to measure the atomizer cone angle by using image processing to identify the edges on an atomizer cone image.This method was then used in an experimental study of the relationship between the shaping air pressure,the atomizing air pressure and the flow rate on the atomizer cone angle.The results show that the shaping air pressure is positively correlated with the angle of the long axis of the atomizer cone and negatively correlated with the angle of the short axis of the atomizer cone.The atomizing air pressure is positively correlated with the angles of the long and short axes of the atomizer cone and the fluid flow rate.The atomizing air pressure is also coupled with the shaping air pressure.The fluid flow rate has a relatively small effect on the atomizer cone angle.

关 键 词：空气喷涂 喷枪模型 雾锥角 控型空气压力 雾化空气压力 图像处理 

分 类 号：TP242.2[自动化与计算机技术—检测技术与自动化装置]