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Indexed by:期刊论文

Date of Publication:2022-06-29

Journal:大连理工大学学报

Volume:52

Issue:2

Page Number:203-208

ISSN No.:1000-8608

Abstract:It is difficult to measure the dimension of hot large forging accurately
   in forging process because of the high temperature and poor measuring
   conditions.Accurate dimension measurement of hot part is very important
   to improve productivity and reduce scraps during hot forming
   process.Based on the image acquiring method of hot forgings,binocular
   structured light system is used to measure the dimension of hot large
   forgings on-line.Thus,the center-lines of structured light-stripes
   should be extracted by eliminating other kinds of structured light
   reflected by hot large forging.A method for extracting the center-lines
   of structured light-stripes from the single image of hot large forging
   is proposed.According to a certain threshold,the initial locations of
   structured light stripes and other kinds of light stripes are determined
   along a line in the row direction.The cross section of structured light
   stripe usually obeys the Gaussian distribution,so other kinds of light
   stripes can be eliminated by searching along the light stripes.Once the
   start points of light stripes are located in the image,the subpixel
   centers of structured light stripes can be calculated by searching along
   the light stripes.Experimental results show that this method is
   convenient and stable,and can efficiently extract the center-lines of
   structured light stripes which are projected on the surface of hot large
   forgings.

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