标题:
强度解调的光纤光栅振动检测硬件电路设计及实验研究Fiber Bragg Grating Vibration Sensing Hardware Circuit Design and Experiment Research Based on Intensity Demodulation
作者:
陈树芳, 张法业, 姜明顺, 隋青美, 贾磊
关键字:
光纤光栅, 光电检测, 强度解调, 振动信号监测Fiber Bragg Grating, Photoelectric Detection, Intensity Demodulation, Vibration Signal Monitoring
期刊名称:
《Optoelectronics》, Vol.4 No.2, 2014-06-03
摘要:
在分析光纤光栅动态解调方式的基础上，设计了一种基于ASE光源边缘解调技术的高速FBG硬件解调电路。在详细分析光电转换及放大电路元件器性能参数的基础上，选择光电管FDSP625及放大器LTC6240作为该高速光纤光栅解调硬件电路的核心元器件，实现了该电路元器件之间的优化匹配，提高了该硬件解调电路的解调精度。构建光纤光栅动态检测平台，详细验证了该光纤光栅硬件解调系统的频率响应特性。实验数据表明该光电解调电路静态白噪声在500 mV内；在0 Hz~1000 Hz频率范围内，可以较好的响应外界频率的变化。
This paper presents a circuits design of high-speed FBG demodulation based on ASE edge demodulation technology. After a detailed performance parameter analysis, the core components of FBG demodulation circuit, FDSP625 and LTC6240, are adopted to match other circuit elements so that the demodulation accuracy is improved. In order to confirm the characteristics of the designed FBG demodulation circuit, FBG dynamic measurement system is employed to analyze the frequency response. The data from experiments indicate that the static white noise is in 500 mV, and it can give a well response to the external frequency changes within the range of 0 Hz - 1000 Hz frequency.