Xueling Liu, Jinchun Hu, Hao Tong, Aixue Ge, Shengwu Du, Yu Zhu. Linear Displacement Measurement Based on Image Grayscale Information[J]. Acta Optica Sinica, 2019, 39(4): 0412008
- Acta Optica Sinica
- Vol. 39, Issue 4, 0412008 (2019)
Fig. 1. Schematic of vision-based linear displacement measurement system
Fig. 2. Influence of detection point topology on displacement measurement accuracy. (a) N=10; (b) N=20
![[in Chinese]](/Images/icon/loading.gif){kind=icon}
Fig. 2. [in Chinese]
Fig. 3. Random motion trajectory
Fig. 4. Displacement measurement error under ideal condition
Fig. 5. Standard deviation of displacement measurement error at each position. (a) d=7 pixel, N=10; (b) d=2 pixel, N=10; (c) d=2 pixel, N=35
Fig. 6. Gray value of detection point and curve of measurement model
Fig. 7. Measurement results of proposed method and grating-scale displacement sensor
Fig. 8. Curve of measurement error
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Table 1. Parameter setting for simulation
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