应用于早期火灾探测的CO传感器  

Development of a CO sensor for early fire detection

作　　者：党敬民 于海业[1] 宋芳 王一丁[2] 孙裕晶[1] DANG Jing-min;YU Hai-ye;SONG Fang;WANG Yi-ding;SUN Yu-jing(College of Biological and Agricultural Engineering,Jilin University,Changchun 130022,China;College of Electronic Science and Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]吉林大学生物与农业工程学院,吉林长春130022 [2]吉林大学电子科学与工程学院,吉林长春130012

出　　处：《光学精密工程》2018年第8期1876-1881,共6页Optics and Precision Engineering

基　　金：国家重点研发计划资助项目(No.2016YFD0700101;No.2016YFC0303902;No.2017YFB0402800);国家自然科学基金资助项目(No.61775079;No.61627823;No.61307124)

摘　　要：为了实现对火灾的早期探测,设计了一种高精度、高灵敏度CO传感器。该传感器以激射波长的为2.33μm的连续型分布反馈激光器为光源。采用波长调制光谱(WMS)技术与一次谐波量化的二次谐波检测方法相结合的研究手段,对典型环境压力下复杂、重叠的光谱吸收特征进行分离,从而实现了良好的选择性和较高的灵敏度。基于Allan Werle方差的系统长期稳定性评估分析表明,系统的检测限(LoD)为1.18μL/L;当积分时间达到205s时,系统能够实现0.08μL/L的测量精度。最后,纸、棉花以及松木等容易产生阴燃的可燃物燃烧实验表明,所研制的传感器具有良好的早期火灾探测能力。A high-precision,high-sensitivity carbon monoxide(CO)sensor was developed for early fire detection.This sensor relied on a continuous wave distributed feedback(DFB)laser emitting at a wavelength of approximately 2.33μm as an excitation source.A 2f/1f Wavelength Modulation Spectroscopy(WMS)strategy was adopted to isolate complex,overlapping spectral absorption features associated with ambient pressure and to achieve excellent specificity and high detection sensitivity.Allan-Werle deviation analysis was used to evaluate the long-term performance of the CO sensor system.A Limit of Detection(LoD)of 1.18 parts per million by volume(μL/L)was achieved with a measurement precision of 0.08μL/L for an optimal integration time of^205 s.The early fire detection of paper,cotton,and pine wood was conducted in the field,which verified the reliable and robust operation of the developed sensor.

关 键 词：火灾探测 一氧化碳(CO) 分布反馈激光器 波长调制光谱 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]