A Novel Method to Measure Sub-micro Repeatability of the High-Precision Positioning Control System Based on Digital Image Correlation Method
To measure and analyze the repeatability of the high-precision positioning control system, an optical technique based on Digital Image Correlation (DIC) method coupling with digital microscope is proposed. In this study, the reliability and feasibility of this method is verified in high-accuracy motorized linear platform, the repeatability of which is calibrated as ±0.3 μm. To determine the in-plane displacement, the DIC requires two speckles images during each hysteresis process to represent the displacement change of platform using digital microscope. In essence, the method can be considered as a “plane to plane” measurement, which can effectively reduce the random error compared to “point to point” measurements. In last, five groups of displacement data under different loadings were obtained and be used to testify the feasibility of this method. In summary, the present study provides a simple, low-cost and efficient non-contact optical technique to detect sub-micro repeatability.
Keywordssub-micro repeatability digital image correlation optical detection
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- 1.K. Prakash Babu, A. Chandini Priyanka, K. Sahithi, and K. Kavyasri, “A study of gauge repeatability and reproducibility characteristics on critical parameters of a cylinder liner,” I-Manag. J. Instrum. Control Eng. 3 (4), 36–50 (2015).Google Scholar
- 5.Zhao Guoyong, Li Qingyu, and Zhua Bingyuan, “The immune self-adjusting contour error coupled control in machining based on grating ruler sensors,” Sens. Transducers 181 (10), 37–43 (2014).Google Scholar
- 27.Liang Jinwen, Chen Lincai, and He Gong, Error Theoretics and Data Processing (China Metrology Publishing House, Beijing, 2001).Google Scholar