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| 高浓度气体共振光声光谱信号饱和特性研究 | |
| 引用本文： | 袁长迎,炎正馨,蒙瑰,李智慧,尚丽平.高浓度气体共振光声光谱信号饱和特性研究[J].物理学报,2010,59(10):6908-6913. |
| 作者姓名： | 袁长迎 炎正馨 蒙瑰 李智慧 尚丽平 |
| 作者单位： | 1. 西南科技大学国防科技学院,绵阳,621010 2. 西安科技大学能源学院,西安,710054 3. 西南科技大学信息工程学院,绵阳,621010 |
| 基金项目： | 四川省教育厅科研基金(批准号:08ZD1102)和国家高技术研究发展计划(批准号:2006AA10Z214)资助的课题. |
| 摘 要： | 采用恒流驱动耦合机械斩波技术在激光光声光谱装置上系统测量了5%—100%宽浓度范围甲烷气体的共振光声信号,发现在高浓度区共振光声信号呈现异常的饱和特征.基于气体吸收和光声光谱原理定量分析了光声信号饱和的主要原因及影响因素,研究表明,气体样本对入射光强吸收而导致的声源与本征共振模式的耦合系数改变是异常饱和的主要原因,并导出判定光声信号饱和深度的准则以用于判定高浓度气体饱和深度。 |
| 关 键 词： | 光声光谱 信号饱和 气体传感 |
| 收稿时间： | 2009-11-07 |
Photoacoustic signal saturation characteristics of concentrated gases |
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| Yuan Chang-Ying,Yan Zheng-Xin,Meng Gui,Li Zhi-Hui,Shang Li-Ping.Photoacoustic signal saturation characteristics of concentrated gases[J].Acta Physica Sinica,2010,59(10):6908-6913. | |
| Authors: | Yuan Chang-Ying Yan Zheng-Xin Meng Gui Li Zhi-Hui Shang Li-Ping |
| Institution: | (1)National School of Defense Technology, Southwest University of Science and Technology, Mianyang 621010,China; (2)School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; (3)School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010,China |
| Abstract: | The photoacoustic (PA) spectrum of methane in the concentration range of 5%—100% has been experimentally investigated by coustant direct current drive coupling mechanical chopper technology. The results indicated that abnormal signal saturation occurred at high gas concentrations. The main reasons and its correlated factors of the photoacoustic signal has been quantitatively analyzed based on signal absorption and photoacoustic principles. It is found that the change in coupling coefficient of sound source and optical cavity modes caused by the intensity of incident light absorbed by gas sample is the major reason, and a criterion was put forward for signal saturation depth estimation. |
| Keywords: | photoacoustic spectroscopy signal saturation gas sensing |
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