基于LabVIEW的空芯光子晶体光纤CO_2气体检测系统  

Detection system of CO_2 using hollow-core crystal fiber based on LabVIEW

作　　者：吕淑媛 杜绍勇 Lv Shuyuan;Du Shaoyong(School of Electronic Engineering,Xi′an University of Posts and Telecommunications,Xi′an 710061,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710061

出　　处：《红外与激光工程》2018年第11期203-208,共6页Infrared and Laser Engineering

基　　金：陕西省教育厅专项科研计划(15JK1681)

摘　　要：为了实现全光纤型高灵敏度气体在线检测系统,以空芯光子晶体光纤为传感气室,利用CO_2气体分子在1 572.48 nm附近吸收谱以及虚拟仪器LabVIEW平台搭建了双光路差分CO_2气体近红外检测实验系统。实验中所用空芯光子晶体光纤长度为1.8 m,通过对其两端同时充气,提高了系统响应速度,0.1 MPa下充气过程仅需100 s左右。以标准浓度CO_2气体对该系统进行了标定,并对浓度2%、5%、10%和100%的CO_2气体进行了测量,结果表明100 min内浓度检测相对误差不超过2%,标准差最大3.32%。气体吸收光程为1.8 m,系统检测灵敏度达到5.981 8×10^(-5)μW/ppm。For the purpose of realizing the all-fiber gas detection system with high sensor sensitivity,using the Hollow Core-Photonic Crystal Fiber(HC-PCF)as gas cell,a dual-optical path differential near-infrared carbon dioxide detection experimental system based on virtual instruments LabVIEW and the absorption spectroscopy around wavelength 1 572.48 nm of carbon dioxide molecule was developed.The system response time was about 100 s by inflating the HC-PCF of 1.8 m long from two ends under the pressure of 0.1 MPa.The detection system was calibrated with carbon dioxide of standard concentration.Carbon dioxide with known concentration of 2%,5%,10%and 100%were tested respectively and the experimental results showed that the detection errors relative to standard concentration were no more than 2%and the maximum standard deviation of measured concentration were 3.32%in 100 minutes.In addition,the optical path of gas absorption reaches 1.8 m and the system detection sensitivity of 5.981 8×10-5μW/ppm was achieved.

关 键 词：CO2检测 空芯光子晶体光纤 双光路差分 LABVIEW 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]