基于磨痕检测的润滑油抗磨性能测定方法

Antiwear property measuring method of lubricant based on wear scar detection

为了测定润滑油的抗磨性能,基于梯度信息提出了一种钢球磨痕直径测定方法。利用钢球磨痕区域具有丰富、同方向磨痕的特点,采用四方向梯度模板提取磨痕纹理梯度图像。对磨痕纹理梯度图像进行二值化、闭运算、去零星和填补空洞等处理,自动分割出钢球的磨痕区域。通过计算钢球磨痕区域的面积,求取磨痕的等效直径,根据测定的磨痕直径快速测量润滑油的抗磨性能。对磨痕检测结果进行了定性和定量试验,并对本文方法和显微镜测定方法进行对比。试验结果表明:利用本文方法提取的磨痕区域完整,边缘清晰,显微镜测定方法的平均测量误差为4.015%,本文方法的平均测量误差为0.073%,测量精度高。

In order to measure the antiwear property of lubricant,a measuring method of steel ball wear scare diameter was presented based on gradient information.Because of steel ball wear scar region had rich and same direction wear scars,the texture gradient images of wear scar were extracted by using four direction gradient template.The steel ball wear scare region was automatically separated from the wear scar texture gradient image by the processings of binary,close operation,removing sporadic regions and filling holes.The equivalent diameter of wear scar region was obtained by using the calculated wear scar region area of steel ball.The antiwear properties of lubricant were fast measured through the calculated wear scar diameter.Qualitative and quantitative tests were carried out to the wear scar detection result,and the result was also compared with the traditional microscope measurement result.Analysis result indicates that the wear scar area of extraction method is complete and the edges are clear.The average error of traditional microscope measurement method is 4.015%,the average error of extraction method is0.073%,so the extraction method has high measurement accuracy.1tab,3figs,15refs.