Abstract:With plough shin as the experimental object, using structured light and binocular stereo vision, under laboratory conditions, the 3D reconstruction and measurement system of hot plough body′s template curves is built, and the extraction algorithm of non-Gaussian distribution laser stripe′s sub-pixel center and edge detection methods of morphology is proposed. Based on the 3D correction of original image, the second correction and high-precision matching algorithm are studied, and the accuracy and speed of stereo matching and 3D reconstruction are improved. On Halcon platform, the center extraction, reconstruction, fitting and mathematical description of the plough body′s template curves of structured light are realized, the difficult problem of measurement of the template curves of plough body, especially of hot forging plough body is solved. It provides a new way for the inspection, mapping, description, manufacturing and design of the plough body. Running on the Intel(R)Core(TM)i7-5500U CPU@2.40 GHz processor, the measurement accuracy is 1.88 mm, and time consuming is 316 ms. The experimentald results show that the structured light and binocular stereo vision can be used to measure the template curve of the plough body, and the influence of hot forging radiation light and other interference effects are avoided. It has a certain accuracy and feasibility, and can improve the efficiency of the design, manufacture and test of the plough body.
邢作常, 田素博, 刘思瑶, 林静, 张祖立. 基于机器视觉和结构光的犁体样板曲线测量[J]. 排灌机械工程学报, 2016, 34(4): 363-369.
XING Zuochang, TIAN Subo, LIU Siyao, LIN Jing, ZHANG Zuli. Measurement of the template curve of plough body based on stereo vision and structured light. Journal of Drainage and Irrigation Machinery Engin, 2016, 34(4): 363-369.
[1]赵毅,王明辉,马品奎,等.热态锻件结构光三维测量技术[J]. 中国机械工程,2006,17(s1):125-128. ZHAO Yi,WANG Minghui, MA Pinkui,et al.Structured light 3D measurement technology of hot forging[J].China mechanical engineering,2006,17(s1):125-128.(in Chinese)[2]聂绍珉,张庆,李树奎,等. 大型锻件尺寸CCD测量的数学模型研究[J].塑性工程学报,2006,13(6):110-113. NIE Shaomin,ZHANG Qin,LI Shukui,et al. The research of the mathematical model in the CCD measuring about the dimension of large-size forging workpiece[J].Journal of plasticity engineering,2006,13(6):110-113.(in Chinese)[3]杨延竹,陈能洁,朱炜,等.大锻件尺寸在线测量技术的研究[J].锻压技术,2015,40(1):6-12. YANG Yangzhu,CHEN Nengjie, ZHU Wei,et al. Research on on-time dimension measurement on heavy forging[J].Forging & stamping technology,2015,40(1):6-12.(in Chinese)[4]孟德安,赵升吨,张琦,等. 板材折弯件全长弯曲角度的双目视觉检测方法研究[J].锻压技术,2013,38(6):104-120. MENG Dean, ZHAO Shengdun, ZHANG Qi,et al. Research on binocular vision method for full-length bending angle of bending plate[J]. Forging & stamping technology,2013,38(6):104-120.(in Chinese)[5]CHEN Frank,BROWN G M.Overview of three-dimensional shape measurement using optical methods[J]. Opt eng,2000,39(1):10-12.[6]O G Technologies,Inc. A hot eye(TM)based coordinate measuring machine for the forging industry[R].Office of Industrial Technologies Energy Efficiency and Renewable Energy,U.S. Department of Energy,2004.[7]ZHANG Ruiying,ZHOU Ping,FENG Xu,et al.Rapid extration of line structured light stripe in large field of view[J].Journal of applied optics,2010,31(3):432-436.[8]徐兴,洪添胜,岳学军,等.基于数字图像的水位识别系统及其方法[J].排灌机械工程学报,2014,32(1):34-40. XU Xing, HONG Tiansheng, YUE Xuejun,et al. Di-gital image-based water level recognizing system and method[J].Journal of drainage and irrigation machinery engineering,2014,32(1):34-40.(in Chinese)[9]何世权,肖宏,樊丁,等.高频焊管错边缺陷的图像处理及特征提取[J].江苏大学学报(自然科学版),2012,33(4):450-454. HE Shiquan,XIAO Hong,FAN Ding, et al.Image processing and feature extraction of welding seam misalignment for high-frequency welded pipe[J].Journal of Jiangsu University(natural science edition),2012,33(4):450-454.(in Chinese)[10]MARAGOS P. Differential morphology and image processing[J].IEEE trans on image processing,1996,5(6):922-937[11]王芳荣,赵丁选,尚涛,等.应用计算机视觉技术进行物体三维重构[J].吉林大学学报(工学版),2008,38(6):1424-1428. WANG Fangrong,ZHAO Dingxuan,SHANG Tao,et al.3D object reconfiguration by computer vision[J]. Journal of Jilin University(engineering and technology edition), 2008,38(6):1424-1428.(in Chinese)[12]吴万荣,史建,徐智.双目立体视觉技术在潜孔钻机钻孔定位中的应用[J].江苏大学学报(自然科学版),2015,36(1): 67-71. WU Wangrong,SHI Jian,XU Zhi.Application of binocular stereo vision in down-the-hole drill position[J].Journal of Jiangsu University(natural science edition), 2015,36(1):67-71.(in Chinese)[13]PAPADIMITRIOUS D V,DENNIS T.Epipolar line estimation and rectification for stereo image pairs[J].IEEE trans on image processing,1996,5(4):672-676.[14]YU Y,LI J,JIA F,et al. Three dimensional object mat-ching in mobile laser canning point clouds[J]. IEEE geoscience and remote sensing letters,2014,12(3):492-496.[15]宁志刚,程雄,程辉,等.扰动状态下柑橘的视觉空间定位[J].江苏大学学报(自然科学版),2015,36(3): 295-300. NING Zhigang,CHENG Xiong,CHENG Hui, et al.Vi-sual spatial orientation of oscillating orange[J].Journal of Jiangsu University(natural science edition),2015,36(3):295-300.(in Chinese)