摘要
对斜齿圆柱齿轮螺旋角测量方法进行了研究,提出了基于视觉技术的斜齿圆柱齿轮螺旋角参数非接触式自动测量方法。利用相机采集斜齿轮端面图和侧面图,并对斜齿轮端面图进行图像处理,然后通过搜寻端面图中齿厚和齿槽宽相等的位置确定分度圆位置,从而获得斜齿轮端面分度圆与齿顶圆的比值。应用Canny算子对滤波后的斜齿轮侧面图最中间的轮齿部分齿顶进行亚像素边缘提取,为减小齿顶实际边缘线外其他短线的干扰,采用基于Tukey权重函数的最小二乘法进行直线拟合,将该直线与斜齿轮中轴线所夹锐角作为斜齿圆柱齿轮齿顶圆处螺旋角参数,根据分度圆处螺旋角与齿顶圆处螺旋角的几何关系求得分度圆处螺旋角,即斜齿圆柱齿轮的螺旋角。实验结果表明,该方法满足测量精度要求,具有较高的应用价值。
The measurement method of helical angle of helical cylindrical gear is studied,and a non-contact automatic measurement method of helical angle parameters of helical cylindrical gear based on vision technology is proposed.The end face and side face pictures of helical gear are collected by camera,and the end face picture of helical gear is processed.The position of the indexing circle is determined by searching the position where the tooth thickness and the tooth slot width are equal in the end face diagram,so as to obtain the ratio of the indexing circle of the helical gear end face to the tooth top circle.For the part of the tooth top of the most middle tooth in the filtered helical gear side view,Canny operator is used for sub-pixel edge extraction.In order to reduce the interference of other short lines outside the actual edge line of the tooth top,the least square method based on Tukey weight function is used for straight line fitting.The acute angle between the straight line and the central axis of the helical gear is taken as the helix angle parameter at the tooth top circle of the helical cylindrical gear.According to the geometric relationship between the helix angle at the indexing circle and the helix angle at the tooth top circle,the helix angle at the indexing circle is obtained,which is the helix angle of helical cylindrical gear.The experimental results show that this method meets the requirements of measurement accuracy and has high application value.
作者
李献
杜文华
段能全
宋保全
Li Xian;Du Wenhua;Duan Nengquan;Song Baoquan
出处
《工具技术》
北大核心
2022年第9期124-128,共5页
Tool Engineering
基金
国家自然科学基金(51905496)。
关键词
机器视觉
斜齿圆柱齿轮
螺旋角
图像处理
machine vision
helical cylindrical gear
helix angle
image processing
