Design and Analysis of Vision Inspection Mechanism for Turbo Generator′s Coil Strip
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摘要: 汽轮发电机转子铜排在完成端部铣削加工后需对其加工精度进行严格地检测。本文中设计一种视觉检测机构，通过输送装置的动力输入、校正模块的位姿校正、检测模块的图像获取及算法处理，实现转子铜排自动检测，解决人工检测的安全和效率问题。建立数学模型计算了校正模块的可行性，利用ANSYS Workbench对夹具-工件系统的接触变形进行了仿真计算。实验结果证明，视觉检测机构能迅速准确地校正转子铜排位姿并获取高精度的鱼尾槽尺寸信息。Abstract: A turbo generator′s coil strip needs to be strictly tested after milling its both ends. Traditional artificial mechanical inspection methods are inefficient. In this paper, a vision inspection mechanism for turbo generator′s coil strip is designed. Through the power input of the conveying device, the posture correction of the correction module, the image acquisition and the algorithm processing of the inspection module, the automatic inspection of the rotor copper bar is realized, and the safety and efficiency problems of the manual detection are solved. Establishing a mathematical model to calculate the feasibility of the calibration module, ANSYS Workbench is used to simulate the contact deformation of fixture-workpiece system. Experiments is designed to verify the inspection accuracy of the mechanism. The experimental results show that the machine vision inspection mechanism can quickly and accurately correct the position of the rotor copper row and obtain high-precision size information of the coil strip slot.
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Key words:
- coil strip slot /
- posture correction /
- machine vision /
- mathematical models /
- contact deformation
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表 2 重复测量数据对比
mm 尺寸 Max Min R μ0 μ σ H1 2.1325 2.1105 0.0220 2.1 2.1214 0.0038 H2 2.0653 2.0505 0.0148 2.1 2.0570 0.0028 W 2.6515 2.6201 0.0304 2.6 2.6350 0.0052 D 8.0349 7.9957 0.0392 8.0 8.0180 0.0070 
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表 3 重复实验误差计算
mm 参数 $\left( {\mu - 3\sigma } \right) - {\rm{Min}}$ ${\rm{Max}} - \left( {\mu + 3\sigma } \right)$ H1 −0.0005 −0.0003 H2 −0.0019 −0.0001 W −0.0007 0.0009 D 0.0013 −0.0041
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