Fiber Bragg grating(FBG)sensor is demodulated based on linear filter demodulation method.A high-speed processor S3C2440(ARM9)and a 24 ∑-ΔA/DC conversion are used to improve the signal to noise ratio and simplify the system structure.The system resolution after demarcating can reach 1 pm,dynamic state’s measuring scope can reach 50 nm. 更多还原