基于光纤光栅地震检波解调系统的微弱信号检测电路设计.pdf

文档介绍：28 5 28 5
第卷第期光电技术应用
2013 10 OctoberVol. ,
年月 ELECTRO-OPTIC TECHNOLOGY APPLICATION ,
·电路与控制·
基于光纤光栅地震检波解调系统的微弱信号检测电路设计
闫冰 1 ,丁锋 2
457000
(,河南濮阳;,河南濮阳 457000)
摘要:研究了并设计了应用于光纤光栅地震勘探系统的光电检测电路。宽带光源经光纤光栅传感器反射回来的布拉格
信号波很微弱,这就对微弱信号的检测提出了一个很大的难题,也影响着整个地震勘探解调系统的检测精度。在对一般电路设
mV
计的思路基础上,研究和设计了可探测微弱信号的光电转换电路。经过实验证明,此电路的噪声仅为,从而提高了系统
的解调精度和速度。
关键词:光纤光栅;光电检测;地震勘探;电路设计
TP368 A 1673-1255 2013 -05-0065-04
中图分类号: ; 文献标识码: 文章编号: ( )
Design of Weak Signal Detection Circuit Based on Fiber Bragg Grating
Seismic Demodulation system
YAN Bing1, DING Feng2
457000
(1. Zhongyuan Oilfield Petroleum & Chemical Technology General Plant Instrument Factory of Sinopec, Puyang , China;
457000
Oilfield Survey and Design Institute of Sinopec, Puyang , China)
Abstract: A photoelectric detection circuit used in fiber Bragg grating (FBG) seismic surveying system is re⁃
searched and designed. The Bragg signal wave reflected by a fiber grating reflector from a broadband light source
is very weak. So the detection of weak signal is very difficult and the detection accuracy of the entire seismic de⁃
modulation system is also influenced. Based on the general circuit design idea, a photoelectric conversion circuit
detecting weak signals is researched and designed. Experimental results show that the no