基于FPGA的嵌入式FBG解调系统的研究

Research in the embedded fiber bragg Grating image demodulate system based on FPGA

波分复用技术是构成各种复杂和大型FBG传感网络最关键的复用技术。为了有效解调FBG传感阵列,提出并实现了一种基于COMS图像传感器的FBG图像解调方案,方案的硬件平台采用以FPGA和ARM处理器为核心的主从结构设计,将FBG阵列的波长解调转化为了FBG光斑图像解调。实验结果表明,FBG图像解调系统具有精度高、复用能力强、远程监控、易于维护和升级等优点,对推广应用大型FBG传感网络有实际意义。

WDM technique is the key technology in the complicated and large-scale sensor networks based on FBG. In order to demodulate FBG sensor array effectively, an approach of the Fiber Bragg Grating image demodulate system based on CMOS image sensor is proposed and implemented. An embedded hardware platform based on FPGA and ARM is designed by the thought of the principal and subordinate structure, in which wavelength demodulation is transformed skillfully to image demodulation. The experimental results show that the system discussed in this paper has many advantages, such as precise, updatable, easy to be extended and maintained and available to strong multiplexing and remote communication. It is of significance for the use of the FBG sensor networks in the field of the real time monitoring.