史玙菲, 陈欣, 陈继刚. 基于45°反射导光镜的圆孔内壁图像检测方法研究[J]. 应用光学, 2021, 42(2): 255-261. DOI: 10.5768/JAO202142.0202001
引用本文: 史玙菲, 陈欣, 陈继刚. 基于45°反射导光镜的圆孔内壁图像检测方法研究[J]. 应用光学, 2021, 42(2): 255-261. DOI: 10.5768/JAO202142.0202001
SHI Yufei, CHEN Xin, CHEN Jigang. Research on image detection method of inner wall of circular hole based on 45° reflector[J]. Journal of Applied Optics, 2021, 42(2): 255-261. DOI: 10.5768/JAO202142.0202001
Citation: SHI Yufei, CHEN Xin, CHEN Jigang. Research on image detection method of inner wall of circular hole based on 45° reflector[J]. Journal of Applied Optics, 2021, 42(2): 255-261. DOI: 10.5768/JAO202142.0202001

基于45°反射导光镜的圆孔内壁图像检测方法研究

Research on image detection method of inner wall of circular hole based on 45° reflector

  • 摘要: 圆孔工件广泛应用于航空航天等精密制造领域,快速准确地对圆孔内壁图像进行检测是保证工件质量的重要手段。介绍了一种基于45°反射导光镜的圆孔工件内壁图像检测方法,该方法通过将反射镜伸入工件内部获取内壁局部图像,采用连续旋转工件与图像拼接方式获得内壁的完整图像。针对4.5 mm内径的工件设计并制作了一种45°反射镜,理论分析了有效成像区域以及平移和倾斜误差造成的影响。搭建了圆孔工件内壁检测装置,设计并制作了一种专用标定工件,实现了检测装置像素当量的标定。实验结果表明,检测装置的系统像素当量约为5 μm,测量相对误差小于3.5%。单幅图像的有效成像区域得到明显提高,通过拼接方法获得了工件内壁的完整图像。

     

    Abstract: The circular hole workpiece is widely used in aerospace and other precision manufacturing fields. Rapid and accurate detection of the inner wall image of the circular hole is an important means to ensure the quality of the workpiece. An image detection method of inner wall of circular hole workpiece based on 45° reflector was introduced. In this method, the sectional image of the inner wall was obtained by inserting the reflector into the workpiece, and the complete image of the inner wall was obtained by continuous rotation of the workpiece and image stitching ways. A 45° reflector was designed and manufactured for a workpiece with 4.5 mm inner diameter, and the effective imaging area as well as the influence of translation and tilt errors were analyzed theoretically. A measuring device for the inner wall of circular hole workpiece was built, and a special calibration workpiece was designed and manufactured to realize the calibration of pixel equivalent of the measuring device. The experimental results show that the system pixel equivalent is about 5 mm, the measurement relative error is less than 3.5%. The effective imaging area of a single image is obviously improved, and the complete image of the inner wall of the workpiece is obtained by the stitching method.

     

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