Abstract: In wind turbine blade manufacturing industry,to solve the problems of low efficiency and high cost when detecting characteristic dimensions of wind turbine blade’s flange face,this paper proposed a method based on machine vision.By building visual imaging platform,original image is obtain,and image processing operator is used to detect the aperture and center position of all bolt holes on blade’s flange face,the center to center distance between adjacent bolt holes,the circularity and central point coordinate of the bolt holes distribution circle.The proposed method not only has good stability,high efficiency and accuracy,but also meets all the test requirements and has good practical value.

Key words: Dimension detection, Image processing, Machine vision, Wind turbine blade