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1. 发明申请

WO2013096396A1 A METHOD FOR CALIBRATION-FREE SCANNED-WAVELENGTH MODULATION SPECTROSCOPY FOR GAS SENSING 审中-公开
标题翻译：用于气体感测的无校准扫描波长调制光谱的方法
公开(公告)号：WO2013096396A1
公开(公告)日：2013-06-27
申请号：PCT/US2012/070523
申请日：2012-12-19
申请人： THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
发明人： HANSON, Ronald, K. , JEFFRIES, Jay, B. , SUN, Kai , SUR, Ritobrata , CHAO, Xing
IPC分类号： G01J3/433 , G01N21/39
CPC分类号： G01N21/39 , G01J3/433 , G01J3/4338 , G01N33/0062 , G01N2201/12
摘要： A method of calibration-free scanned-wavelength modulation spectroscopy (WMS) absorption sensing is provided by obtaining absorption lineshape measurements of a gas sample on a sensor using l/-normalized WMS-2/j where an injection current to an injection current-tunable diode laser (TDL) is modulated at a frequency ^ where a wavelength modulation and an intensity modulation of the TDL are simultaneously generated, extracting using a numerical lock-in program and a low-pass filter appropriate bandwidth WMS-«/ (n=l, 2,...) signals, where the WMS-«/ signals are harmonics of the f, determining a p hysical property of the gas sample according to ratios of the WMS-«/ signals, determining the zero-absorption background using scanned-wavelength WMS, and determining non-absorption losses using at least two the harmonics, where a need for a non-absorption baseline measurement is removed from measurements in environments where collision broadening has blended transition linewidths, where calibration free WMS measurements without knowledge of the transition linewidth is enabled.
摘要翻译：通过使用标准化WMS-2 / j获得传感器上的气体样品的吸收线形状测量来提供无校准扫描波长调制光谱（WMS）吸收感测的方法，其中注入电流可调二极管激光器（TDL）以频率^调制，其中同时产生TDL的波长调制和强度调制，使用数字锁定程序和低通滤波器适当带宽提取适当带宽WMS ，2，...）信号，其中WMS-«/信号是f的谐波，根据WMS-«/信号的比率确定气体样本的物理特性，使用扫描 - 波长WMS，并且使用至少两个谐波来确定非吸收损耗，其中在碰撞加宽已经混合了过渡线宽的环境中，从非吸收基线测量的需要中去除了测量结果，其中calib 启用了不需要过渡线宽知识的自由WMS测量。

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