基于光纤传感器的甲烷气体浓度信号采集方法

doi:10.16389/j.cnki.cn42-1737/n.2017.05.010

江汉大学学报（自然科学版） ›› 2017, Vol. 45 ›› Issue (5): 439-443.doi: 10.16389/j.cnki.cn42-1737/n.2017.05.010

基于光纤传感器的甲烷气体浓度信号采集方法

孙超^1，2，丁建军^*1，章盛¹

1. 江汉大学物理与信息工程学院，湖北武汉 430056；2. 华中科技大学国家数控技术工程研究中心，湖北武汉 430074

出版日期:2017-10-28 发布日期:2017-10-31
通讯作者: 丁建军
作者简介:孙超（1984—），男，实验师，博士生，研究方向：光纤传感器网络技术。
基金资助:
国家科技支撑项目（2013BAD11B02，2014BAD14B05-5）；中国科学院科技服务网络计划合作项目（KFJSW-STS-172）；武汉市市属高校产学研结合项目（CXY201401）

Methane Concentration Signal Acquisition Method Based on Optical Fiber Sensor

SUN Chao^1，2，DING Jianjun^?1，ZHANG Sheng¹

1. School of Physics and Information Engineering，Jianghan University，Wuhan 430056，Hubei，China；2. National NC System Engineer Research Center，Huazhong University of Science and Technology，Wuhan 430074，Hubei，China

Online:2017-10-28 Published:2017-10-31
Contact: DING Jianjun

摘要/Abstract

摘要： 基于光谱吸收法设计了一种反射型光谱吸收光纤传感器网络结构，该结构可以完成对远距离多点甲烷气体浓度的实时测量。为了能够保证光谱扫描波长中心值与甲烷气体吸收峰相同，激光光源通过波长调制光谱完成调制，采用调整三角波的幅值与偏移量对光源波长进行调整。在接收端，为了对光电信号进行有效的采集，设计了一种多点高速信号的采集方法，并分析其调制深度的影响。实验证明，软件采集算法以及合适的调制深度能够满足工程中光纤气体传感器多点采集的精度要求。

关键词: 光纤传感器, 准分布式, 多点采集, 调制深度

Abstract: In order to complete the real-time measurement of long-distance multi-point gas concentration，the writer designed the structure of a reflection-type spectral absorption fiber sensor network. The laser light source was modulated by the wavelength modulation spectrum，and the wavelength of the light source was adjusted with the amplitude and offset of the triangular wave，to ensure that the spectral scanning center value was the same as the methane gas absorption peak. At the receiving end，in order to effectively collect the photoelectric signal，a multi-point high-speed signal acquisition software method was designed in this paper ，the influence of its modulation depth was analyzed at the same time. Experimental results showed that the software acquisition algorithm and the appropriate modulation depth could meet the precision requirements of multi-point acquisition of optical fiber gas sensor in engineering.

Key words: optical fiber sensor, quasi-distributed, multi-point acquisition, modulation depth

中图分类号:

TN913

孙超，丁建军，章盛. 基于光纤传感器的甲烷气体浓度信号采集方法[J]. 江汉大学学报（自然科学版）, 2017, 45(5): 439-443.

SUN Chao，DING Jianjun，ZHANG Sheng. Methane Concentration Signal Acquisition Method Based on Optical Fiber Sensor[J]. Journal of Jianghan University(Natural Science Edition), 2017, 45(5): 439-443.

基于光纤传感器的甲烷气体浓度信号采集方法

Methane Concentration Signal Acquisition Method Based on Optical Fiber Sensor

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