微小型加速度計磁鋼組件自動裝配設備研制
[Abstract]:Accelerometer is an important part of inertial navigation system. It is a typical micro electromechanical product. Its performance directly affects navigation accuracy. The assembly quality of accelerometer torque magnets will affect the linearity of accelerometers and thus the performance of accelerometers. At present, the assembly of accelerometer magnetic steel assembly mainly depends on manual operation. The assembly efficiency is low, the precision is poor, the assembly depends on the skill of the assembler, and the product consistency is poor. It is urgent to develop automatic assembly equipment and apply high precision automatic assembly technology to solve this problem. In this paper, a precision automatic assembly equipment based on machine vision is developed for the assembly of magnetic steel components of a certain type of micro accelerometer. The equipment is divided into visual measurement module, assembly module, workbench module and assembly control module. The visual measurement module is used to obtain the position and attitude of the parts. The assembly module completes the tasks of picking up, moving and assembling the parts. The work table module provides the assembly space. The fixture realizes the functions of clamping and fixing after assembly. The assembly control module controls the orderly work of other modules of the equipment and provides the man-machine interface. According to the features of shell and magnetic steel parts, the operating device and fixture are designed to ensure the stability of assembly process, improve the assembly accuracy, and realize the real-time detection and control of assembly force. Visual measurement is a non-contact measurement method, which is fast and does not damage parts. In order to improve the accuracy and efficiency of visual measurement, an automatic focusing algorithm based on coarse and fine image gray value is developed. The variance function and the gradient variance function are used as the image definition evaluation functions in the two stages of rough refinement, and the mountain climbing method and the quadratic interpolation method are used to search the optimal solution. The illumination environment is set according to the characteristics of the magnetic steel and shell parts to ensure the image acquisition quality of the upper surface of the magnetic steel and shell parts. The median filter is used to preprocess the image with linear gray enhancement to improve the recognition accuracy. Based on the image stitching technology, the acquisition range of large magnification camera is expanded. Finally, the edge points are extracted and the circle is fitted with the least square method. The measuring task of the parts is completed, and the position information of the feature points of the parts to be assembled is obtained. The main factors affecting assembly accuracy are analyzed, and the error compensation model is established based on homogeneous coordinate transformation. The angle between image coordinate system, visual measurement coordinate system and assembly operation coordinate system is calibrated. The verticality error between the axes of the three-dimensional moving platform is compensated. The assembly accuracy can reach 10 渭 m, which meets the design requirements, assembly stability, consistency and so on.
【學位授予單位】:大連理工大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:TH824.4
【參考文獻】
相關期刊論文 前10條
1 鄭魁敬;潘春瑩;許斐;;機器人裝配中的視覺引導定位技術研究[J];制造技術與機床;2016年03期
2 洪裕珍;任國強;孫健;;離焦模糊圖像清晰度評價函數(shù)的分析與改進[J];光學精密工程;2014年12期
3 郭靜;羅華;張濤;;機器視覺與應用[J];電子科技;2014年07期
4 辛明哲;羅怡;陳勇;王曉東;;一種微小撓性零件的自動化精密裝配系統(tǒng)[J];機電工程;2013年12期
5 沈飛;徐德;唐永建;吳文榮;余大海;;微操作/微裝配中微力覺的測量與控制技術研究現(xiàn)狀綜述[J];自動化學報;2014年05期
6 張宏飛;張亞濤;劉志廣;;基于梯度閾值計數(shù)的清晰度評價算法[J];科學技術與工程;2013年34期
7 李愷;王小捷;韓微微;;芯片識別定位系統(tǒng)中LED光源的應用研究[J];電子工業(yè)專用設備;2012年12期
8 鄭媛媛;姜威;;一種新的自動聚焦算法的研究[J];光學技術;2011年04期
9 申曉彥;王鑒;;用于視覺檢測的光源照明系統(tǒng)分析[J];燈與照明;2009年03期
10 陳立國;劉柏旭;;復合式MEMS微夾持器的研制[J];光學精密工程;2009年08期
相關博士學位論文 前3條
1 張習文;微小型加速度計的精密裝配及影響性能的因素研究[D];大連理工大學;2013年
2 劉暢;微裝配機器人關鍵技術研究[D];華中科技大學;2012年
3 宋宇;面向微操作的微小型機器人視覺伺服技術研究[D];哈爾濱工業(yè)大學;2007年
相關碩士學位論文 前10條
1 楊坤;微裝配機器人的無標定視覺伺服研究[D];華中科技大學;2015年
2 張?zhí)m芳;WXJJⅡ型精密裝配系統(tǒng)研制及精度分析[D];大連理工大學;2015年
3 陳鵬宇;面向高性能微小零件裝配的組裝夾具技術研究[D];大連理工大學;2013年
4 張偉;微小型零件精密裝配及三維誤差測量研究[D];大連理工大學;2013年
5 黃翔;微裝配機器人控制系統(tǒng)設計[D];華中科技大學;2011年
6 李國林;PID控制器參數(shù)整定技術研究與優(yōu)化設計[D];大連理工大學;2010年
7 程新宇;基于機器視覺的微小型零件精密裝配研究[D];大連理工大學;2008年
8 劉攀龍;石英撓性加速度計的標定與溫度補償研究[D];國防科學技術大學;2008年
9 葉凱;微裝配機器人系統(tǒng)姿態(tài)調整裝置的設計與應用[D];華中科技大學;2007年
10 蔡建華;新型微夾鉗技術研究[D];華中科技大學;2006年
,本文編號:2260078
本文鏈接:http://sikaile.net/kejilunwen/yiqiyibiao/2260078.html