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为满足微细管道内部缺陷检测需要,提出了一种将外部光源导入、内部图像导出的解决新思路,基于360°全景锥镜、视像管、环形光源、近景光学镜头及高分辨率相机构建了光学信息传输部件,并与计算机共同组成机器视觉检测系统。在检测系统构建中,光学信息传输部件的姿态调整是一个关键环节,本文对此展开了深入的研究,给出了调整评判依据及完整的调整实现流程,最终构建了较为理想的微细管道内部缺陷测量系统。基于测量系统,对深100mm、孔径9mm的管道样件内壁上0.5、0.8及1.0mm的微孔模拟缺陷进行了多次测量,测量结果标准差分别为0.025、0.026及0.028mm。实验结果表明,基于本文的调整技术构建的检测系统,可以实现检测部件与待测管道的精确对准,进而实现微细管道内部缺陷的高精度测量。
In order to meet the need of detection of internal defects in fine tubes, a new idea of introducing external light sources and deriving internal images was proposed. Based on 360 ° panoramic cone, video tube, ring light source, near-field optical lens and high-resolution camera Optical information transmission components, and together with the computer machine vision inspection system. In the construction of the inspection system, the attitude adjustment of the optical information transmission component is a key link. In this paper, an in-depth study has been carried out. The basis of adjustment and judgment and a complete adjustment and realization process are given. Finally, the ideal internal defects of fine pipes measuring system. Based on the measurement system, the microhole simulation defects of 0.5, 0.8 and 1.0mm on the inner wall of a pipe sample with a depth of 100mm and a diameter of 9mm were measured several times. The standard deviations were 0.025, 0.026 and 0.028mm respectively. The experimental results show that the detection system based on the adjustment technology of this article can achieve accurate alignment between the test components and the pipe to be tested and realize the high-precision measurement of the internal defects of the micro-pipe.