一种高精度中红外大气甲烷传感系统的研制
发布时间：2018-11-09 09:20
【摘要】：报道了一种采用中红外室温连续带间级联激光器(ICL)的高精度大气甲烷检测系统.使用的ICL激光器的发光波数范围为2 998.4~2 999.6cm-1,覆盖甲烷在2 999.06cm-1处的较强吸收峰.为增强气体吸收,采用容积为220mL、吸收光程为54.6m多通池作为气体吸收池.采用LabVIEW平台和数据采集卡,产生激光器扫描及调制信号,同时获取探测器信号并采用数字运算提取二次谐波.实验结果显示,当传感器系统的平均采样时间为3.3s时,传感器系统的阿伦方差为11.2ppbv.采用该系统对实验室内外空气中甲烷浓度进行了长时间的测量,证实该传感器系统具有较强的工程实用价值.
[Abstract]:A high precision atmospheric methane detection system based on (ICL) is reported. The luminescent wave number of the ICL laser is in the range of 2998. 4 渭 m ~ (-6) cm ~ (-1), covering the strong absorption peak of methane at 2 999.06cm-1. In order to enhance the gas absorption, the volume is 220 mL and the absorption path is 54.6 m multipass cell is used as the gas absorption cell. Using LabVIEW platform and data acquisition card, laser scanning and modulation signals are generated, detector signals are obtained and second harmonic is extracted by digital operation. The experimental results show that when the average sampling time of the sensor system is 3.3 s, the Aram variance of the sensor system is 11.2 ppbv. The system has been used to measure the methane concentration in the air inside and outside the laboratory for a long time. It is proved that the sensor system has strong practical value in engineering.
【作者单位】： 汕头大学工学院;吉林大学电子科学与工程学院集成光电子学国家重点联合实验室吉林大学实验区;
【基金】：国家自然科学基金(Nos.61627823,61307124) 国家留学基金(No.201508440112) 广东省青年教师培养计划(No.YQ2015071) 国家重点研究发展计划(Nos.2016YFD070010,2016YFC0303902)资助~~
【分类号】：TP212;X831
本文编号：2320007
[Abstract]:A high precision atmospheric methane detection system based on (ICL) is reported. The luminescent wave number of the ICL laser is in the range of 2998. 4 渭 m ~ (-6) cm ~ (-1), covering the strong absorption peak of methane at 2 999.06cm-1. In order to enhance the gas absorption, the volume is 220 mL and the absorption path is 54.6 m multipass cell is used as the gas absorption cell. Using LabVIEW platform and data acquisition card, laser scanning and modulation signals are generated, detector signals are obtained and second harmonic is extracted by digital operation. The experimental results show that when the average sampling time of the sensor system is 3.3 s, the Aram variance of the sensor system is 11.2 ppbv. The system has been used to measure the methane concentration in the air inside and outside the laboratory for a long time. It is proved that the sensor system has strong practical value in engineering.
【作者单位】： 汕头大学工学院;吉林大学电子科学与工程学院集成光电子学国家重点联合实验室吉林大学实验区;
【基金】：国家自然科学基金(Nos.61627823,61307124) 国家留学基金(No.201508440112) 广东省青年教师培养计划(No.YQ2015071) 国家重点研究发展计划(Nos.2016YFD070010,2016YFC0303902)资助~~
【分类号】：TP212;X831
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