摘要
针对大型圆柱锻件热态在线检测的难题,提出了一套双目系统结合移动装置的检测方法,论证了其测量原理。对传统双目系统做了优化设计,即用线绿激光源在锻件表面产生清晰光条纹图像,用高分辨率左右相机采集;在相机镜头前装500nm滤波片以消除高温辐射影响且不影响图像轮廓采集;将双目系统置于导轨上,并整体安装在移动车上,用另一点绿激光源标记转站标志点以衔接测量区域,用全站仪实时跟踪左相机位置以简化坐标转换,解决了双目视觉法测量范围小的问题。对双目系统空间点三维重建公式做了数学推导修正,将其应用于Φ2×10m圆柱件,结果表明,误差小于1‰。
In order to overcome the difficulty of online measurement of the large hot cylindrical forgings at very high temperature,a method combining the mobile devices with the binocular vision system is pro- posed in this paper. Firstly, the traditional binocular vision system is optimized, including using the line green laser to mark clear stripes on forgings, using high-resolution cameras to get these stripes, setting a 500 nm filter on each camera for eliminating the thermal radiationrs influence and obtaining the forgings~ outlines synchronously at the same time, and placing the whole system on the rails installed on a remov- able manual truck to expand the binocular vision system＇s measurement range. Meanwhile another point green laser is designed to get marking points in order to connect the measurement areas. And an elec- tronic total station is used to track the left camera＇s position to simplify the coordinate transformation. Then, the formula for 3D data reconstruction of binocular vision system is corrected to adapt to the actu- al conditions. The results show the error is under 1‰ when φ2 × 10 m forging is measured in this way. This method is fast and accurate,which can provide references for hot-state measurement of large forg- ings.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2013年第10期1977-1983,共7页
Journal of Optoelectronics·Laser
基金
四川省高新产业发展重大关键技术(11kjt-04)
西南科技大学教育部重点实验室开放基金(11zxzk04)
重庆大学机械传动国家重点实验室开放基金(SKLMT-KFKT-200901)资助项目
关键词
大型锻件测量
高温测量
双目视觉
优化设计
large-forgings measurement
high-temperature measurement
binocular vision system
opti-mization
