基于光吸收的开齿润滑油膜非接触检测研究

Research on non-contact and non-destructive testing technology foropen gear lubricating oil film based on light intensity absorption

为了解决涂覆于金属基底材料上的润滑油膜非接触无损检测问题,采用全光学方法,基于本征光吸收原理对相关问题进行了研究。以大型开式齿轮润滑油膜为例,基于润滑油膜本征光吸收谱,确定了检测使用的最优照明光波长;然后检测并分析了金属基底上不同厚度油膜的图像,建立了油膜厚度与图像灰度的对应关系。在此基础上,搭建检测装置,分别使用针对最优波长光进行优化的光源和CCD作为照明及采集装置,进行图像采集实验,对其探测能力进行了验证。结果表明,该方法可为大型开齿润滑油膜状态监测提供技术支持,也可为其它固体附着油膜厚度的检测提供可行的技术参考。

In order to solve the problem of non-contact and non-destructive testing of lubricating oil film coated on metal substrate materials,an all-optical method was adopted to study the related problems based on the principle of intrinsic light intensity absorption.The lubricating oil film of large open gears was taken as an example,specifically,based on the intrinsic light absorption spectrum of the lubricating oil film,the optimal illumination wavelength for detection was determined.Then,the images of oil films with different thicknesses on the metal substrate were detected and analyzed,and the corresponding relationship between oil film thickness and image gray level was established.On this basis,a detection setup was built,and an optimized light source for the optimal wavelength and a charge-coupled device(CCD)were used as the illumination device and acquisition device respectively to carry out image acquisition experiments to verify the detection capability of the technology proposed in this paper.The method proposed in this paper can provide technical support for monitoring the status of large open gear lubricating oil film,and can also provide a feasible technical reference for detecting the thickness of solid adherent oil film.