高精度相机镜头光机轴线偏差检测系统开发与实验研究
发布时间：2018-12-10 22:23
【摘要】：高精度相机为工业生产提供精确的视觉测量系统,并使航空航天领域的视觉定轨测量成为现实,其镜头的光轴方向是保证目标对准的关键参数,而镜头在生产装配过程中会导致光轴与镜头机械轴的位置误差,需要对该误差进行检测并判断其影响程度。 课题通过对高精度相机镜头生产装配过程工艺技术的研究,以及光轴一致性检榆测手段的分析,设计完成一套以自准直原理为主要实现原理的相机镜头光机轴线偏差检测设备。将装调过程中的方法转化成后期产品检验方法,设计并加工组装系统整体结构,配合辅助分析软件,有效测量并分析误差传递,实现对镜头光机轴线的检测。 系统核心技术为将镜头光轴有效引出至高精度旋转轴线,采用轴系晃动精度在3.5”以内的气浮转台作为参考轴线,之后进行旋转轴线与镜筒轴线空间夹角的测量。利用机器视觉技术捕捉透镜球心反射成像,并采用OSTU目标识别算法编写软件来实现假像剔除真像捕捉,从而达到直观输出实时测量结果,方便进行轴线拟合操作的目的。以像素值为单位识别计算误差,实现精确测量以及结果量化输出。 设备适用于不宜拆卸的成品相机镜头光机轴线的偏差检测以及辅助相机安装使用。对于航空航天领域的远距离观测以及目标定位有重要意义,为远距离视觉识别操控技术提高精准度带来有效的帮助。 实验台设备最终测量的光轴的引出精度在25”以内,在各部件选型以及加工工艺得到提高后该精度可有进一步提升空间。
[Abstract]:The high precision camera provides the accurate vision measurement system for the industrial production, and makes the vision orbit determination measurement in the field of aerospace become a reality. The optical axis direction of the lens is the key parameter to ensure the target alignment. The position error between the optical axis and the mechanical axis of the lens will be caused by the lens in the process of production and assembly, so it is necessary to detect the error and judge the influence degree of the error. Based on the research of manufacturing and assembling process technology of high precision camera lens and the analysis of optical axis consistency measuring method, a set of measuring equipment of axis deviation of camera lens optical machine is designed and completed based on the principle of autocollimation. The whole structure of assembly system is designed and processed, and the error transmission is effectively measured and analyzed with auxiliary analysis software to realize the inspection of lens optical machine axis. The key technology of the system is to effectively extract the lens optical axis from the rotation axis line with high precision. The air floating table with shafting precision less than 3.5 "is used as the reference axis, and then the angle between the rotation axis line and the mirror tube axis is measured. Machine vision technology is used to capture the spherical reflection imaging of lens, and OSTU target recognition algorithm is used to write a software to eliminate the true image capture, which can directly output the real time measurement results and facilitate the axis fitting operation. Using pixel value as the unit to identify the calculation error, the accurate measurement and the quantization output of the result can be realized. The equipment is suitable for measuring the deviation of lens axis of finished camera lens and auxiliary camera installation. It is of great significance for long-range observation and target positioning in aerospace field, and it can help to improve the precision of remote vision recognition and control technology. The precision of the optical axis measured by the experimental equipment is less than 25 ", and the precision can be further improved when the selection of the components and the processing technology are improved.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB85;TP391.41
本文编号：2371310
[Abstract]:The high precision camera provides the accurate vision measurement system for the industrial production, and makes the vision orbit determination measurement in the field of aerospace become a reality. The optical axis direction of the lens is the key parameter to ensure the target alignment. The position error between the optical axis and the mechanical axis of the lens will be caused by the lens in the process of production and assembly, so it is necessary to detect the error and judge the influence degree of the error. Based on the research of manufacturing and assembling process technology of high precision camera lens and the analysis of optical axis consistency measuring method, a set of measuring equipment of axis deviation of camera lens optical machine is designed and completed based on the principle of autocollimation. The whole structure of assembly system is designed and processed, and the error transmission is effectively measured and analyzed with auxiliary analysis software to realize the inspection of lens optical machine axis. The key technology of the system is to effectively extract the lens optical axis from the rotation axis line with high precision. The air floating table with shafting precision less than 3.5 "is used as the reference axis, and then the angle between the rotation axis line and the mirror tube axis is measured. Machine vision technology is used to capture the spherical reflection imaging of lens, and OSTU target recognition algorithm is used to write a software to eliminate the true image capture, which can directly output the real time measurement results and facilitate the axis fitting operation. Using pixel value as the unit to identify the calculation error, the accurate measurement and the quantization output of the result can be realized. The equipment is suitable for measuring the deviation of lens axis of finished camera lens and auxiliary camera installation. It is of great significance for long-range observation and target positioning in aerospace field, and it can help to improve the precision of remote vision recognition and control technology. The precision of the optical axis measured by the experimental equipment is less than 25 ", and the precision can be further improved when the selection of the components and the processing technology are improved.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB85;TP391.41
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