Open AccessResearch of High-Speed FBG Demodulation System for Distributed Dynamic Monitoring of Mechanical Equipment
Author(s) -
Zhengying Li,
Zhiqiang Xu,
Zhihao Gavin Tang,
Meng Zhao,
Linjun Cai,
Quan Liu
Publication year - 2013
Publication title -
advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1155/2013/107073
Subject(s) - demodulation , filter (signal processing) , linearity , signal (programming language) , computer science , channel (broadcasting) , electronic engineering , nonlinear system , control theory (sociology) , engineering , electrical engineering , physics , telecommunications , control (management) , artificial intelligence , programming language , quantum mechanics
This paper designs and implements the high-speed FBG demodulation system which can demodulate multiple FBG sensors (up to 64 sensors in series per channel) of 4 channels synchronously. The system is based on the method of tunable F-P filter. Both the nonlinear effect and the temperature drift effect of the F-P filter are eliminated by applying the triangular-like drive signal and reference channels. In addition, a high-speed adaptive algorithm for peak-find is designed for the system. The experiment results show that, for the whole system, the stability is 2 pm, the resolution is 1 pm, the linearity is 0.999, the measurement precision is 20 pm, and the demodulation frequency is 4 kHz. Consequently, the system is very suitable for distributed dynamic monitoring of complicated mechanical equipment
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