基于RANSAC的激光三角法中厚板板形测量技术研究
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摘要
中厚板生产流程中,为了在切割时有效避开表面不平整区域,提出一种基于RANSAC(随机抽样一致性)算法的激光三角法中厚板板形测量技术,测量板形的外轮廓长宽尺寸及表面平整度。采用基于RANSAC算法的曲线拟合方法提取激光光斑中心线,并对比了质心法、最小二乘法、RANSAC算法这三种方法的抗噪声能力。实验结果表明,基于RANSAC算法的测量方法是一种较好的板形检测方法,具有较好的应用前景。
In the production process of medium and heavy plate,in order to effectively avoid the surface uneven area during cutting,a laser triangulation measurement technique based on RANSAC (random sampling consistency) algorithm is proposed to measure the outer contour of the medium and heavy plate shape and surface flatness. The center line of the laser spot is extracted by the curve fitting method based on RANSAC algorithm,and the anti-noise ability of the three methods are compared,including centroid method,least squares method and RANSAC algorithm. The experimental results show that the measurement method based on RANSAC algorithm is a better flatness measurement method and has a good application prospect.
In the production process of medium and heavy plate,in order to effectively avoid the surface uneven area during cutting,a laser triangulation measurement technique based on RANSAC (random sampling consistency) algorithm is proposed to measure the outer contour of the medium and heavy plate shape and surface flatness. The center line of the laser spot is extracted by the curve fitting method based on RANSAC algorithm,and the anti-noise ability of the three methods are compared,including centroid method,least squares method and RANSAC algorithm. The experimental results show that the measurement method based on RANSAC algorithm is a better flatness measurement method and has a good application prospect.
引文
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[2]文聪.热轧带钢平直度CCD检测方法及装置研究[D].重庆:重庆大学,2016.
[3]胡远.基于机器视觉的中厚钢板轮廓检测系统的研究[D].杭州:浙江理工大学,2017.
[4]谢清新,苗建新,陈大海,等.基于激光位移传感器的中厚板在线厚度测量系统[J].冶金自动化,2018,42(6):50.
[5]杨明敏.基于十字激光的中厚钢板平直度检测方法研究[D].杭州:浙江理工大学,2015.
[6]伍非凡.基于双目视觉检测的中厚板轮廓检测系统及远程监控平台开发[D].杭州:浙江理工大学,2017.
[7]刘立波,赵辉,张海波,等.激光三角测距中光斑细分定位方法研究[J].计算机测量与控制,2008,16(10):1396.
[8]赵爱明.基于二次曲线拟合的图像亚像素边缘定位算法[J].哈尔滨理工大学学报,2006,11(3):68.
[9]樊超,狄帅,候利龙,等.基于改进RANSAC算法的车道线识别方法[J].汽车工程,2014,36(6):503.
[10]汤强晋.激光三角法在物体三维轮廓测量中的应用[D].南京:东南大学,2006.
[11]冯金城.高精度实时激光三角测距系统设计[D].南京:南京理工大学,2008.
[12]章小兵,戚俊,张毅.一种关于大位移激光三角法测量参数标定方法的研究[J].量子电子学报,2002,19(1):74.
[13]吴晓波,钟先信,刘厚权,等.应用多项式插值函数提高CCD尺寸测量的分辨率[J].仪器仪表学报,1996,17(2):154.