The Research Of Fiber Bragg Grating Demodulation Technology Based On FPGA

Based on the research of the status about Bragg Grating Demodulation System at home and abroad, the hardware sensor control system which center on FPGA was designed for the fiber Bragg grating demodulation scheme of F-P tunable filter. The control program of data sending, receiving, LCD, keyboard were completed.The high-speed A/D signal acquisition circuit, D/A signal conversion circuit, keyboard circuit, LCD circuit, Ethernet port circuit were mainly included in the hardware system.In the software design, SOPC Builder custom embedded NIOS II CPU, DSP Builder custom FIR low-pass filter, VHDL languages of the sawtooth wave and synchronous pulse generator were completed.At last, the collected data which adopted of system was analyzed for detail, and many improved methods were given for the system.