基于离焦图像模糊分析的微装配力测量

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.

Micro assembly Force Measurement Using Blur Image Analysis

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.