白车身视觉检测系统中视觉传感器的可修复技术  

Reparability Technology of Vision Sensor in Body-in-white Visual Inspection System

作　　者：薛婷[1] 吴斌[2] 叶声华[2] 

机构地区：[1]天津大学电气与自动化工程学院,天津300072 [2]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《机械工程学报》2009年第2期238-242,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50705065);天津市自然科学基金(08JCYBJC10000)资助项目

摘　　要：针对白车身视觉检测系统中组成立体视觉传感器的两个摄像机,在光照不理想的情况下难以获得理想的立体像对,或某个摄像机损坏导致系统不能正常工作的情况,提出视觉传感器可修复技术。在立体视觉测量模型基础上,借助线结构光投射器,引入结构光测量技术,利用立体视觉传感器和左、右两个结构光传感器同时实现特征点的测量,大大提高了测量数据的稳定性和可靠性。研究结果表明,该技术切实可行,计算出的空间点距离与实际距离真值相对偏差优于0.5%,可以很好地完成修复任务,从而实现特征点的不间断测量。As the two cameras that constitute the stereo vision sensor in the body-in-white visual inspection system can hardly obtain ideal stereo image-pair under the condition of inadequate illumination, or as the damage of a camera will cause the system unable to work normally, a reparability technology of vision sensor is proposed. On the basis of the stereo vision measurement model, the structured light measurement technology is introduced by means of the line-structured light projector. The stereo vision sensor and the left and right structured light sensors are used to simultaneously realize the measurement of feature points, thereby greatly improving the stability and reliability of the measured data. The research results indicate that the technology is feasible. The relative deviation of the calculated value of space point distance from the actual distance value is superior to 0.5%, so the technology can fulfill the repair task well and realize the uninterrupted measurement of feature points.

关 键 词：白车身 立体视觉传感器 结构光 可修复 

分 类 号：TN247[电子电信—物理电子学] TP242[自动化与计算机技术—检测技术与自动化装置]