基于双目视觉系统的LCD端子在线测量研究

Research on On-Line Measurement of LCD Terminal Based on Binocular Vision System

在工业自动化应用的测量过程中,主要依靠人工进行液晶显示屏(LCD)端子检测,检测过程困难、效率低等问题时有发生。针对这一问题,设计了一套基于LCD端子在线测量的双目视觉在线测量系统。通过双目摄像机的标定、视觉矫正方法,采集对比度高的图片,提出了一种改进的Hough变换拟合直线。采用Opencv函数库对图像进行形态学处理,并将测量结果实时反馈至控制端,实现了对LCD端子的测量,提高了测量系统的精确率。比较了不同视觉测量系统应用在工业领域的模型,验证了系统具有较高的可行性和鲁棒性,能较好地完成零件的在线检测任务。试验研究和分析结果表明:LCD端子测量的重复性精度可以达到要求,具有较高的实用价值。在未来的工业自动化领域中,通过引入机器视觉相关技术,能有效降低生产成本,提高工作效率。

Measuremenb in industrial automation applications,mainly rely on manual detection of liquid crystal display(LCD)terminals,such as difficult detection process and low efficiency,an on-line measurement system of LCD terminals based on binocular vision system was designed.Through the calibration and visual correction of binocular cameras,images with high contrast were acquired.An improved Hough transform fitting straight line was proposed.The Opencv function library was used for image morphology processing,and the measurement results were fed back to the control terminal in real time,by which the measurement of the LCD terminal was realized,and the accuracy of the measurement system was improved.The models of different vision measurement systems applied in the industrial field were compared,the feasibility and robustness of the system were verified,and the task of online inspection of parts could be completed well.Experimental research and analysis results showed that the repeatability of LCD terminal measurement can meet the requirements,and it has great practical value.In the future industrial automation field,machine vision related technology can effectively reduce production cost and improve work efficiency.