基于FPGA和以太网接口的光栅解调应用  

Grating Demodulation Applied Research Based on FPGA and Ethernet Interface

作　　者：马游春[1,2,3] 王军辉[1,2] 李锦明[1,2] 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 [3]北京航空航天大学光电技术研究所,北京100083

出　　处：《仪表技术与传感器》2013年第2期107-110,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(61076111)

摘　　要：光纤光栅的传感信息是采用波长编码的方式进行的,解调的关键就是把传感信息从波长编码中完整地解调出来。文中介绍的光栅解调系统采用F-P滤波器对ASE光源进行扫描;采用FPGA作为控制核心;采用DM9000A完成网络接口设计,在FPGA内部实现了对光栅传感信号质心解调算法的程序设计和以太网接口控制程序的设计,FPGA具有多通道高速同步解算的能力,在对F-P滤波器500 Hz的扫描速率下,很好地实现了光纤光栅波长的同步实时解算。解调系统的解调精度可达到2 pm左右。The sensor information of optical fiber Bragg grating is the wavelength of the modes of the coding, the key of demod- ulation is to demodulate out completly the sensor information from the wavelength the code. This paper introduced the grating demodulation system using F-P filter to scan the ASE source. It used FPGA as the control core, it used DM9000A to complete network interface design, achieved the design of the programm of centroid demodulation algorithm in grating sensor signal and Ethernet in- terface design in FPGA internal ,with the ability of multi-channel high speed synchronization calculating, in the F-P filter to 500 Hz scan rate,it well implemented synchronous real-time the solution of the fiber Bragg grating wavelength. Demodulation accuracy of the system demodulation is about 2 pm.

关 键 词：光纤光栅 质心法 FPGA 以太网接口 

分 类 号：TN29[电子电信—物理电子学]