基于数字微镜原理的砂轮表面复杂形貌跨尺度三维测量理论与方法

项目名称： 基于数字微镜原理的砂轮表面复杂形貌跨尺度三维测量理论与方法

项目编号： No.51505162

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： 余卿

作者单位： 华侨大学

项目金额： 22万元

中文摘要： 砂轮表面的三维形貌特征对精密磨削过程起着至关重要的作用，目前砂轮表面的三维形貌测量存在着磨粒形貌高分辨测量和磨粒群分布大视场描绘难以同时满足的矛盾。.本项目研究基于数字微镜原理的砂轮表面复杂形貌跨尺度三维测量理论与方法，无需借助测量装置硬件参数的任何改变，亦无需对砂轮表面复杂形貌建模，可实现对砂轮表面形貌的大视场高分辨测量。研究内容包括：.1、研究DMD结构光控制方法、扫描策略，及针对磨粒的超分辨技术与磨粒轮廓快速提取方法，建立DMD跨尺度测量理论模型；.2、研究砂轮表面柔性化照明方法，解决磨粒反光特性造成的光学测量共性难题；.3、研究多尺度图像处理方法，建立多测量尺度误差模型，研究数据融合方法，并通过实验手段对结果进行验证和评价。.本项目的研究，拟提出基于数字微镜原理的砂轮表面复杂形貌跨尺度三维测量方法，可为高效、高精度曲面精密加工技术及相关精密测量领域提供一项新的理论依据和技术支撑。

中文关键词： 数字微镜器件；跨尺度测量；DMD结构光；柔性化照明；多尺度误差模型

英文摘要： The 3D surface topography of grinding wheel is essential for precision grinding processing but there is a nearly insurmountable issue in 3D surface topography measurement of grinding wheel, that is the contradiction between high resolution measurement for characteristics of grain and large field measurement for relationships among grains..Multi-scale 3D measurement theory and method for complex surface topography of grinding wheel based on Digital Micromirror Device (DMD) principle will be researched in this project. It will help achieve large field and high resolution measurement for surface topography of grinding wheel, and this improvement will be without any change of parameters of measuring device, and also without any modeling process for complex surface topography of grinding wheel. The main researches can be summarized as follows:.(1) Control method and scanning strategy of DMD-based structured light will be researched, and some technologies of super-resolution measurement and contour extraction for grains will be studied, then a theoretical multi-scale measurement model will be established..(2) Flexible illuminating method for surface of grinding wheel will be researched, which can help solve 'measuring problem for surface topography with large tilt angle', 'reflection characteristics differences of multi points in the field of view', and other common problems in optical measurements..(3) Multi-scale image processing methods will be studied, and a multi-scale error model will be established; measuring data fusion method will be researched, and the results will be evaluated via experiments..The multi-scale 3D measurement method for complex surface topography of grinding wheel based on DMD principle will be proposed in this project, and the researches can provide novel theoretical basis and technical supports for high precision and efficiency curved surfaces precision machining technology and other related precision measurement fields.

英文关键词： Digital Micromirror Device;Multi-scale Measurement;DMD-based Structured Light;Flexible Illumination;Multi-scale Error Model