Three intelligentization methods for time grating displacement sensor
Xiaokang Liu, Donglin Peng, Yetai Fei, Yudan Zeng · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2008
To improve the precision of time grating displacement sensor and enhance its performance by software, three intelligentization methods are studied. A self-compensation method is proposed based on digital closed-loop control technology that eliminates the influences of these factors such as working condition, circuitry parameters and so on. A self-calibration method for time grating is presented that eliminates zero drift and gain drift without external high-precision reference signals. Then an error self-correction method is proposed. Experiment results conform that high stability is obtained by using self-compensation and self-calibration technology, and high precision is achieved by using self-correction technology.