摘要
提出一种基于小波变换的焊缝截面形态建模方法。基于小波变换模极大原理提取了典型焊缝截面轮廓,分别采用三次样条、带约束的三次样条以及B样条曲线方法对提取的焊缝轮廓进行插值,并基于最小二乘法对插值后的焊缝边缘轮廓进行了数据拟合,得到了焊缝轮廓数学模型。结果表明,采用小波变换提取焊缝截面轮廓是可行的,带约束的三次样条曲线过渡平滑、无突变点,在该试验条件下得到的焊缝截面轮廓数学模型为正弦曲线。
A new modeling method of weld bead profile by MAG welding process was proposed and the edge of the profile was extracted based on wavelet transform. The different interpolation methods, the cubic spline, the constrained cubic spline and the B-spline curve, were utilized respectively, the cross-section edge of weld bead was fitted by least square method, and then the mathematical model of the profile was achieved. The experimental results show that the method is effective to detect the cross-section outline of the profile, the constrained cubic interpolation is preferred choice to interpolate the data of the profile, and the cross-section profile mathematical model of weld bead is sine curve under our experiments.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2008年第12期29-32,共4页
Transactions of The China Welding Institution
基金
军队科研资助项目(2008WG16)
(9140C8502050806)
(9140A27030308JB3502)
中国机械工程学会创新思路预研经费资助项目
关键词
快速成形
小波变换
边缘提取
数学建模
rapid prototyping
wavelet transform
edge detection
modeling
