Distributed Machine Vision Inspection System Based On Network Camera

Product quality demand is the basic demand for products.As an important indicator of product quality,product appearance quality is closely related to product performance,value and people's judgment.More and more attention has been paid to its inspection.With the continuous improvement of inspection speed and accuracy requirements,machine vision is widely used in online product inspection instead of manual method.At present,machine vision inspection system is often used for specific application,which causes that the system doesn't have good adaptability for demand shift.Therefore,it is of great significance to build an online reconfigurable machine vis ion inspection system to improve the automation and adaptability of product inspection.Based on the analysis of the developm ent of machine vis ion technology at home and abroad and the framework of machine vision system,this paper proposed a reconfigurable machine vis ion network control system model,presented the selection principle of system component,designed the minimum system structure and its inspection workflow.On the basis,the identif ication and parameter control methods of GigE camera are pointed out through the research into GigE protocol stack.By analyzing the transmission capability and transmission delay of GigE camera,the matching scheme between product and image is proposed.In addit ion,a general control model of industrial camera is proposed,and base on which the integrated development of a camera instance is completed.In this paper,a reconfigurable inspection system software platform is designed,and the model of product inspection system is proposed and divided into two parts: inspection module and tracking module.For the inspection module,this paper built a distributed parallel computing environment.And this paper completed the development of the publication of parallel computing tasks and the asynchronous network communication between different inspection processes.Also the load balancing and fault tolerance mechanism are discussed for distributed vision system.Finally,combined with the appearance inspection of capacitance,an experimental system was built to verify the function of inspection module and tracking module.The experimental results show that the system can achieve the desired design goals,and has good reconstruction ability which can meet the needs of industrial visual inspection applications.