基于微镜器件和复合传感器的高反射回转面缺陷检测新方法

项目名称： 基于微镜器件和复合传感器的高反射回转面缺陷检测新方法

项目编号： No.51505359

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 机械、仪表工业

项目作者： 周阿维

作者单位： 西安工程大学

项目金额： 20万元

中文摘要： 高反射精密回转类零部件的应用越来越广泛，但该类零部件高反射回转面的凹坑、划痕、擦伤、异物等缺陷严重影响产品的使用性能、寿命和安全，缺陷的准确检测至关重要，但当前的检测技术大多基于视觉传感器的方法，在识别准确性、效率和通用性之间不能兼顾，应用仍受制约。本项目提出基于数字微镜器件(DMD)结合复合传感器(视觉-激光传感器)的高反射回转面缺陷定量检测新方法，研究包括：研制基于DMD的新型自适应条纹照明系统，提高缺陷视觉检测的灵敏度及对曲率不同回转面的自适应能力；提出基于图像差影和主动轮廓模型的方法，实现图像缺陷区域边界快速准确提取；研究基于激光传感器的缺陷定量评价及分类方法，最终建立高反射回转面缺陷定量检测新方法，为进一步研制相应的缺陷检测设备奠定理论和技术基础。这种新的缺陷检测方法具有识别准确性高、效率高和通用性强等突出优点，有望成为现有高反射表面缺陷检测方法的重要补充，具有重要的研究价值。

中文关键词： 光学检测；缺陷定量检测；高反射回转面；复合传感器；数字微镜器件

英文摘要： Highly reflective precision rotary parts have been more and more widely used, but defects (such as dents, scratches, abrasions and foreign materials) over the highly reflective surface of this parts may change the service performance, life, and safety properties of the products. Therefore, defect inspection is very important for surface quality assurance. However, the current technologies of defect inspection, which are generally based on vision sensor, could not reach a balance among the accuracy, efficiency and universality of defect recognition, so that their application is still restricted. A novel quantitative inspection method for surface defects on highly reflective rotary parts based on digital micro-mirror device (DMD) and combined sensor, is proposed in this project. Main works include: Firstly, a new illumination system based on DMD, which can obtain the adaptive fringes, will be studied. The illumination system can improve the sensitivity for visual inspection of surface defects and the adaptive ability for rotary surface, which has the different curvature radii. Secondly, a novel defect extraction method based on image subtraction integrating with active contour model is proposed, which can rapidly, precisely extract boundaries of the defect regions for the obtained visual images. Thirdly, the quantitative assessment and classification of the defects extracted based on laser sensor will be studied. Ultimately, this novel inspection method for surface defects on highly reflective rotary parts will be established, which will settle the theoretical and technological foundation for further development of corresponding device of defect inspection for the surface of highly reflective rotary parts. This novel inspection method based on DMD and combined sensor has the outstanding advantage of the high accuracy, efficiency and universality of defect recognition, and will be hopeful to become an important complement of the current technologies of defect inspection for the highly reflective surface, which indicates that this project have significant research value.

英文关键词： Optical inspection;Defect quantitative inspection;surface of highly reflective rotary parts;combined sensor;digital micro-mirror device