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.
出处
《仪表技术与传感器》
CSCD
北大核心
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)
关键词
光纤光栅
质心法
FPGA
以太网接口
fiber grating
the centroid method
FPGA
the Ethernet interface
