Design and Implementation of a High-Precision Grating Measurement System Based on Optical Signal Processing and Absolute Coding Algorithms
DOI:
https://doi.org/10.71204/cnpjde72Keywords:
Precision Grating Sensor, Optical Signal Processing, Absolute Coding Algorithm, Intelligent Measurement System, Anti-Interference Optimization, Industrial AutomationAbstract
Precision grating sensors are critical components in intelligent manufacturing systems, precision motion control, and high-end automated equipment, where measurement accuracy and signal stability directly affect system positioning performance and operational reliability. However, conventional grating measurement technologies still face challenges related to signal interference, environmental adaptability, coding accuracy, and long-term engineering stability. To address these issues, this paper presents the design and engineering implementation of a high-precision grating measurement system integrating optical sensing, coding signal processing, anti-interference optimization, and absolute coding algorithms. The proposed system establishes a complete technical framework covering grating scribing accuracy control, optical system optimization, coding signal processing, interpolation subdivision algorithms, and full-process accuracy calibration. To improve measurement resolution and environmental robustness, multi-stage digital filtering, automatic gain calibration, electromagnetic compatibility optimization, and temperature compensation strategies are introduced. In addition, a high-resolution absolute coding algorithm based on Gray-code and segmented coding mechanisms is developed to achieve stable absolute position output and power-off position retention. The proposed algorithms and signal-processing methods can be deployed on embedded MCUs and dedicated ASIC platforms for industrial applications. Experimental verification and industrial deployment demonstrate that the developed system achieves high measurement stability, strong anti-interference capability, and reliable long-term operation under harsh industrial conditions. The proposed technology has been successfully applied in CNC machine tools, servo systems, and automated equipment, providing an effective technical solution for domestic substitution and intelligent upgrading of precision displacement measurement systems.
References
General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China. (2012). GB/T 12642-2012 rotary encoders—Specifications and test methods. China Standards Press.
Huang, Q., & Wu, H. B. (2022). Anti-interference design and engineering practice of grating sensors in industrial environments. Machinery Design & Manufacture, (4), 156–159.
Li, D. S., & Zhang, S. J. (2020). High-precision grating scribing technology and error compensation method. Optics and Precision Engineering, 28(6), 1289–1298.
Liu, C., & Chen, T. (2021). Research on absolute grating coding algorithm and signal processing technology. Chinese Journal of Scientific Instrument, 42(2), 78–86.
Wang, J. Z. (2018). Principles and applications of precision grating displacement sensors. China Machine Press.
Zhang, M., & Li, L. (2021). Mass production process optimization and reliability verification of grating displacement sensors. Manufacturing Technology & Machine Tool, (8), 189–192.
Zhao, Y. L., & Jiang, Z. D. (2019). Precision optical measurement technology and system. Science Press.
Downloads
Published
Issue
Section
License
Copyright (c) 2025 Jianming Mao, Haijun Lei, Dengcheng Lu, Shishui Zhou, Chaohui Zhang, Lujie Ren (Author)
This work is licensed under a Creative Commons Attribution 4.0 International License.
All articles published in this journal are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are properly credited. Authors retain copyright of their work, and readers are free to copy, share, adapt, and build upon the material for any purpose, including commercial use, as long as appropriate attribution is given.