9 November 2010 An FPGA-based demodulation system for fiber Bragg grating sensing
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This paper introduces the principle of fiber Bragg grating (FBG) sensor, designs and realizes a compact wavelength demodulation system for FBG sensing using a Fabry-Perot (F-P) filter. FPGA is adopted as a main controller to control a D/A converter to produce a sawtooth wave for driving the F-P filter, and to design the data acquisition circuit for collecting the output signals of photoelectric detector. The collected data is processed after transmitting to PC through the data transmission circuit, and then the demodulation of FBG wavelength is completed finally. This compact FBG wavelength demodulation system is expected to have wide applications in on-line monitoring of electric power equipment and large structures.
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Yongqian Li, Yongqian Li, Haitao He, Haitao He, Guozhen Yao, Guozhen Yao, "An FPGA-based demodulation system for fiber Bragg grating sensing", Proc. SPIE 7853, Advanced Sensor Systems and Applications IV, 78532F (9 November 2010); doi: 10.1117/12.869810; https://doi.org/10.1117/12.869810

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