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Two-dimensional high-precision non-contact automatic measurement method based on image corner coordinates
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science ( IF 2 ) Pub Date : 2021-01-18 , DOI: 10.1177/0954406220981124
Maoyue Li 1 , Yonghao Xu 1 , Zengtao Chen 2 , Kangsheng Ma 1 , Lifei Liu 1
Affiliation  

Aiming at some shortcomings of the existing non-contact two-dimensional high-precision measurement methods, this paper proposes a two-dimensional high-precision non-contact automatic measurement method based on the corner coordinates of the image. Firstly, this paper designs a set of simple image acquisition device and explains the advantages of the Canny operator used in the image contour detection algorithm. Subsequently, this paper proposes a dimension calibration algorithm based on image corner coordinates, which can convert the pixel size to the actual size, and achieves the function of the algorithm by hierarchical, multi-step processing of the image. Finally, in order to realize the intelligent positioning and selection of the standard size workpiece position, an automatic measurement and positioning system is designed, which can convert the actual size signal into the pulse time control signal. The experimental results show that the measurement method proposed in this paper has the advantages of fast measurement speed, high robustness, low cost and high degree of automation. When using a black-and-white checkerboard paper with an accuracy of 0.1 mm, the measurement accuracy can reach the micron level.



中文翻译:

基于像角坐标的二维高精度非接触式自动测量方法

针对现有非接触式二维高精度测量方法的不足,提出一种基于图像角点坐标的二维高精度非接触式自动测量方法。首先,本文设计了一套简单的图像采集装置,并说明了Canny算子在图像轮廓检测算法中的优势。随后,本文提出了一种基于图像角点坐标的尺度校正算法,该算法可以将像素大小转换为实际大小,并通过对图像进行分层,多步处理来实现该算法的功能。最后,为了实现标准尺寸工件位置的智能定位和选择,设计了一种自动测量定位系统,可以将实际尺寸信号转换为脉冲时间控制信号。实验结果表明,本文提出的测量方法具有测量速度快,鲁棒性高,成本低,自动化程度高的优点。使用精度为0.1毫米的黑白棋盘纸时,测量精度可以达到微米级别。

更新日期:2021-01-19
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