PROCEEDINGS ARTICLE | November 9, 2010
Proc. SPIE. 7853, Advanced Sensor Systems and Applications IV
KEYWORDS: Fiber Bragg gratings, Imaging systems, Sensors, Imaging spectroscopy, Field programmable gate arrays, Demodulation, Signal processing, Charge-coupled devices, CCD image sensors, Signal detection
A CCD fiber Bragg grating sensor demodulation system based on FPGA is proposed. The system is divided into three
units: spectral imaging unit, signal detection unit and signal acquisition and processing unit. The spectral imaging unit
uses reflective imaging system, which has few aberration, small size, simple structure and low cost. In the signal
detection unit, information of spectrum are accessed by CCD detector, the measurement of spectral line is converted into
the measurement of the pixel position of spot, multi point can be simultaneously measured, so the system's reusability,
stability and reliability are improved. In the signal acquisition and processing unit, drive circuit and signal acquisition
and processing circuit are designed by programmable logic device FPGA, fully use of programmable and high real-time
features, simplified system design, improved the system's real-time monitoring capabilities and demodulation speed.
