Zhiliang WU, Nian CAI, Weicheng OU, Xiaona CHEN, Han WANG. High-precision Measurement for a Quantum Dot Encoder Based on Triangular-wave Skeleton Extraction of Coding Patterns[J]. Acta Photonica Sinica, 2023, 52(6): 0612001
- Acta Photonica Sinica
- Vol. 52, Issue 6, 0612001 (2023)
Fig. 1. Displacement measurement principle of quantum dot encoder［31］
Fig. 2. Signal capture system for the quantum dot encoder
Fig. 3. Pipeline of the proposed measurement method
Fig. 4. Contour detection of the coding pattern
Fig. 5. Skeleton extraction of the coding pattern
Fig. 6. Displacement measurement
Fig. 7. Radial basis function neural network
Fig. 8. Measurement system of the quantum dot encoder
Fig. 9. Comparisons of different waveform fittings
Fig. 10. Measurement errors obtained by five methods
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Table 1. Hardware and software environment configurations of the displacement measurement method
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Table 2. Comparisons of fitting results via different waveforms
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Table 3. Comparisons of error compensation for the quantum dot encoder via different neural networks
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Table 4. Ablation experiments
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