Design And Research Of Real-time Dual Processors Fabric Defect Detection System Based On Vision

As an important part of production process in textile industry, the results offabric defect inspection determines the quality of the fabric. At present most ofdefects inspection in our country are still in the traditional manual stage. With thedevelopment of labor productivity, shortcomings such as high cost, low efficiencyand poor consistency are highlighted. To overcome the shortcomings, an automaticfabric defect inspection system was designed for research based on the industrialvision system.In this paper, firstly, the basic steps of automatic fabric inspection wereconfirmed. Through analysis, the system design should be considered real-time,accuracy and other issues. Then a dual processor processing system architecture wasproposed, and the system overall design was completed. The system was dividedinto four subsystems such as mechanical drive control subsystem, illumination andimaging subsystem, image acquisition and processing subsystem, human-computerinteraction. Finally, the function and composition of each subsystem wereascertained.Secondly, from the perspective of the mechanical drive control system, byanalyzing the inspecting machine MT2500structure, A mechanical controlframework was designed which based on one-chip computer which C8051F120asthe core. Then the paper expounds the hardware circuit design and the software ofprocessor control design. A nonlinear model of tension control is established. Andfinally the fabric tension closed-loop control was realized by an asymmetric PIcontroller. Through the experiment test, the controller can meet require of thecontrol system well.Thirdly, the thesis carried on the improvement of the equipment selection andinstallation for the imaging system, and realized the camera outside the synchronoustrigger. A homemade white LED lamp array was selected as the lighting source. Andthe PWM dimming control system is designed and implemented for the hardwarecircuit and software. Through experimental tests, the dimming system maximumilluminance is up to177400lx. After implementation platform related systems, based on Gabor filter algorithmprogressive parallel processing research. First combined with the maximum entropyprinciple to determine the specific treatment and implementation process of thisarticle Gabor algorithm, and then through analyzing the characteristics of the Gaborfilter algorithm in this paper, the process in the form of "task" approach to taskallocation so as to realize the parallel processing of two processors. At last, throughthe experiment to test the performance of double processors processing, it showsthat parallel processing algorithm can get better speed, and the increase processingspeed can reach about63%.Finally, for the design of software system, this paper expounds the systemcontrol, dual processor set and the upper machine data transmission and acquisitionand processing and other related specific design and implementation. Through thesystem test, show that the proposed system architecture has certain feasibility andinstantaneity, defect detection rate can reach94%for other detection algorithm ofreal-time and parallel to accelerate the research laid the foundation.