The Research On Key Technologies Of UVW Positioning Platform Based On Binocular Vision

With the requirements of intelligent manufacturing and precision machining,high-precision positioning and aligning system has been the key technology and important part of the industry.In the electronic industry,PCB,LCD and other industries,the positioning accuracy required by the product is usually up to microns.The UVW motion platform is used to achieve three degrees of freedom(X,Y,θ)precision motion,the UVW platform not only has high positioning accuracy,but also has a wide range of applications and a large number of demand features.With the rapid development of machine vision technology,the focus of research has been the UVW positioning platform using visual inspection system for location information extraction and feedback.However,the research status of UVW platform combined with visual system at home and abroad shows that there is still a gap between domestic alignment technology and foreign countries.Based on this,a UVW positioning system based on binocular vision is proposed in this paper.This thesis mainly researches and develops a set of UVW positioning system based on binocular vision.And further research is carried out on the key techniques such as kinematics analysis,inverse solution,visual system positioning and application software development.The development of the control system and the visual positioning system have been completed.And based on the developed UVW platform prototype,the PCB plate is used as the part to be located and the positioning experiment is carried out.The content of this thesis is as follows.1.The kinematic analysis of UVW platform has been achieved.The inverse kinematic solution has been completed.The accurate solution of the world coordinate system X,Y and θ to the platform coordinate system U,V and W is realized.2.A self calibration method of vision system based on position feedback information of UVW platform is proposed.Based on this calibration method,a system location algorithm is proposed.3.The control system of UVW vision positioning platform is designed.The software for motion control and vision localization has been developed.4.Based on the developed software and hardware platform,the system calibration and visual positioning control experiments are completed.The experimental results show that the UVW vision positioning platform can reach the positioning accuracy of 3μm.The correctness of the visual inspection scheme is verified.It can meet the requirement of industrial application.