摘要
为了解决自研的激光扫描投影系统在实际扫描投影零部件外形轮廓时会存在拖尾、缺失和非预期的圆角过渡等图形偏差,严重影响投影出零部件外形轮廓的形状准确度的问题.通过分析拖尾和缺失偏差、转角偏差产生的原因,研究了基于时间补偿的激光扫描投影图形偏差校正方法,得出了补偿时间与采样率间的关系,建立了时间补偿与投影图形转角角度间的数学模型.应用所研究方法在自主搭建的激光扫描投影系统中进行验证实验,并与国外FARO激光扫描投影系统的投影图形进行对比.实验结果表明:对优化投影路径后的5行5列棋盘格图形进行投影时,比较偏差补偿前后实际投影图形效果,补偿后的投影图形形状准确度优于0.5 mm.基于时间补偿的激光扫描投影偏差校正方法可以有效地补偿拖尾和缺失偏差、能够优化非预期的转角偏差,该方法应用于自主研发的激光扫描投影系统能够显著提高投影图形准确度,具有良好的实际应用价值.
The accuracy of projected patterning is seriously influenced by several problems in practice,such as tailing,missing and corner deviations.In order to solve the above mentioned problem based on the self-developed laser scanning projection set-up,the causes of tailing,missing and corner deviation are theoretically analyzed,then,the correction method of projection patterning deviation is studied based on time-compensated technology.Furthermore,the relationship between compensation time and sampling rate is obtained,and the mathematical model between compensation time and angle of projected patterning is established.Finally,the studied method is applied to the self-developed set-up of laser scanning projection,and the actual projected patterning are compared with the patterning which is projected by the FARO laser scanning projection system.The results show that the method can effectively eliminates the tailing and missing deviations,can compensate the corner deviation satisfactorily when projected checkerboard patterning with 5 rows and 5 columns.Compared the projected patterning before and after compensation for deviation,the accuracy of projection patterning is better than 0.5 mm.The studied method can improve accuracy of projected patterning significantly when applied to the self-developed set-up of laser scanning projection.Moreover,the studied method has good value for practical application.
作者
侯茂盛
陈雨情
刘大礼
孙明利
史铮雪
李丽娟
HOU Mao-sheng;CHEN Yu-qing;LIU Da-li;SUN Ming-li;SHI Zheng-xue;LI Li-juan(Key Laboratory of Optoelectronic Measurement and Optical Information Transmission Technology of Ministry of Education,College of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;Beijing Institute of Space Mechanics&Electricity,Beijing 100094,China)
出处
《光子学报》
EI
CAS
CSCD
北大核心
2020年第4期66-75,共10页
Acta Photonica Sinica
基金
国家自然科学基金(No.61805022)
吉林省科技发展计划重点科技攻关项目(No.20160204052GX)。
关键词
激光扫描投影
偏差校正
时间补偿
拖尾
缺失
转角
Laser scanning projection
Deviation correction
Time compensation
Trailing
Missing
Corner
