Research On Welding Seam Recognition Technology For Nondestructive Inspection Robot

In general,the path planning problem of nondestructive inspection robot is solved by strict artificial identity or location of off-line programming way,and that the way of the two kinds of path planning is often restricted in inspection condition that leads to low efficiency and accuracy,also cannot achieve intelligent inspection.So the weld recognition technology overcomes the shortcoming of traditional path planning of nondestructive inspection robot,promotions nondestructive inspection robot welding seam recognition efficiency and precision of nondestructive inspection robot's automatic tracking problem solving,implements the intelligent of the weld nondestructive inspection and automation,which have significant meaning.In the nondestructive inspection robot welding seam recognition technology research,weld identification method research is the key.Aimed at Nondestructive inspection robot welding seam recognition problem,the author of this paper researches different method of weld recognition and studies the different recognition methods,constitutes a set of weld seam recognition technology of evaluation system,and sets up a corresponding algorithm performance evaluation index.According to different weld work pieces,nondestructive inspection robot welding seam recognition technology of evaluation system choose a suitable welding seam recognition algorithm by algorithm performance evaluation indicators to complete the weld recognition.Through analyzing the characteristic of weld seam image visual,weld recognition algorithm is proposed based on image boundary characteristics.Through the analysis of weld seam image statistical,characteristics of weld recognition algorithm is proposed based on image texture feature.Presented weld recognition algorithm in this thesis' s research contains both ordinary image recognition method(e.g,using projection technology to identify weld)and cover image recognition method of complex(e.g,by using the technique of artificial neural network to identify weld).And this paper uses seam recognition algorithm of weld and weld the intersecting line of two different types of welds in this paper were verified.The test results show that the recognition can seam recognition algorithm proposed in this paper to complete the weld.Finally in the Matlab platform,based on the research of the welding seam recognition method,build the evaluation system of nondestructive inspection robot welding seam recognition,and carry on the simulation experiments for different types of weld.The experimental results show that the appropriate welding seam recognition algorithm of weld recognition can be chosen by the evaluation system of performance evaluation index.In this paper,the nondestructive inspection robot welding seam recognition technology is carried on the theoretical research and experimental testing.And according to the method to build experimental platform,it helps improve the accuracy of nondestructive inspection robot welding seam recognition and stability,solve the problem of nondestructive inspection robot automatic tracking,lay a theoretical foundation for weld nondestructive inspection system of intelligent.At the same time,the content of this paper can also provide theoretical guidance for the research of visual inspection technology of nondestructive inspection robot.