文献类型：期刊文献

中文题名：基于TDLAS-WMS的高灵敏度电子鼻传感器设计

英文题名：Design of electronic nose sensor with high sensitivity based on TDLAS-WMS

作者：陈思慧[1]

机构：[1]广东海洋大学教育信息中心

年份：2017

卷号：39

期号：3

起止页码：317

中文期刊名：沈阳工业大学学报

外文期刊名：Journal of Shenyang University of Technology

收录：CSTPCD、、北大核心2014、Scopus、北大核心

基金：广东省教育厅科研资助项目(2014XGJK181)

语种：中文

中文关键词：非接触式;痕量;甲烷;TDLAS-WMS技术;量子级联激光器;herriott气室;长光程;传感器

外文关键词：non-contact; trace; methane; TDLAS-WMS technology ; quantum cascaded laser （ QCL ） ;herriott gas cell; long optical patch; sensor

中文摘要：为了对痕量有害气体(甲烷为例)进行非接触式检测,本文基于可调谐二极管激光吸收光谱(TDLAS)与波长调制光谱(WMS)相结合的检测技术,采用中心波长为7.5μm的量子级联激光器(QCL),设计并研制出高灵敏度电子鼻传感器系统.在室温条件下,通过调节QCL注入电流,使其发光光谱扫过甲烷(CH4)气体吸收谱线.同时采用紧凑型herriott气室(长度为40 cm,容积为800 m L),使得系统总光程达到16 m.利用该传感器系统,对不同浓度的CH4进行测量,结果显示,测量相对误差小于7%,检测下限为1×10^(-9).同时,研究人员可以通过更换其他激射波长的QCL,实现对其它有害气体的检测.

外文摘要：In order to carry out the non-contact type detection of trace noxious gas （ methane）, based on the detection technology in combination with both tunable diode laser absorption spectroscopy （TDLAS） and wavelength modulation spectroscopy （WMS）, the quantum cascaded laser （QCL） with the centre wavelength of 7.5 Ixm was adopted, and an electronic nose system with high sensitivity was designed and developed. At room temperature, the luminescent spectrum of QCL could scan the methane （CH4 ） absorption line through adjusting the injection current of QCL. In addition, a compact herriott gas cell with a length of 40 cm and a volume of 800 mL was adopted to achieve the total optical path of 16 m. The methane with different concentrations was detected with the developed sensor system. The results show that the relative detection error is less than 7%, and the minimum detection limit is 1 × 10-9. Moreover, the detection of other harmful gases can be realized through replacing QCL with other emitting wavelength.