基于离焦图像模糊分析的微装配力测量  

Micro-assembly Force Measurement Using Blur Image Analysis

作　　者：蒋如意[1] 刘洪涛[1] 胡文[1] 梁庆华[1] 王石刚[1] 

机构地区：[1]上海交通大学机械与动力工程学院

出　　处：《上海交通大学学报》2010年第8期1046-1050,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50875169)

摘　　要：提出了一种基于机器视觉的微装配力测量新方法.拍摄微夹持器受力变形时的离焦模糊图像,通过建立微夹持器变形力和离焦量之间的关系模型,把求取变形力的问题转化为求取离焦模糊图像的离焦量问题.采用粗精两步计算来求取模糊图像的离焦量,并利用微夹持器的变形曲线来拟合,拟合得到的曲线的参数即为变形力的函数,从而求得变形力.仿真实验证明了所提出的方法的有效性.A new approach based on machine vision to measure the force during micro-assembly was proposed.After the acquisition of out-of-focus blur image of micro-gripper under force,with the established model of the relationship between the force and the out-of-focus blur parameter,the problem of force measurement is transformed into that of blur parameter identification.A coarse-fine blur identification method is then put forwarded,where micro-gripper＇s bending curve is used for curve fitting the blur parameters.The coefficient of the fitted curve has a direct relationship with the force.The simulation results show this method＇s validity.

关 键 词：离焦模糊 点扩散函数 马尔可夫随机场 微力测量 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术] TB133[自动化与计算机技术—计算机科学与技术]