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    • 11. 发明申请
    • Reactive Gas Detection In Complex Backgrounds
    • 复杂背景下的活性气体检测
    • US20110093215A1
    • 2011-04-21
    • US12911666
    • 2010-10-25
    • Xin ZhouXiang LiuAlfred FeitischGregory M. Sanger
    • Xin ZhouXiang LiuAlfred FeitischGregory M. Sanger
    • G06F19/00G01N21/25
    • G01N21/3504G01N2021/3545G01N2021/399G01N2201/1215
    • A differential absorption spectrum for a reactive gas in a gas mixture can be generated for sample absorption data by subtracting background absorption data set from the sample absorption data. The background absorption data can be characteristic of absorption characteristics of the background composition in a laser light scan range that includes a target wavelength. The differential absorption spectrum can be converted to a measured concentration of the reactive gas using calibration data. A determination can be made whether the background composition has substantially changed relative to the background absorption data, and new background absorption data can be used if the background composition has substantially changed. Related systems, apparatus, methods, and/or articles are also described.
    • 可以通过从样品吸收数据中减去设置的背景吸收数据,为样品吸收数据产生气体混合物中的反应气体的差分吸收光谱。 背景吸收数据可以是包括目标波长的激光扫描范围中背景组合物的吸收特性的特征。 使用校准数据可以将差示吸收光谱转换为测量的反应气体浓度。 可以确定背景组合物是否相对于背景吸收数据基本上改变,并且如果背景组合物已经基本上改变,则可以使用新的背景吸收数据。 还描述了相关系统,装置,方法和/或制品。
    • 13. 发明授权
    • Background compensation by multiple-peak measurements for absorption spectroscopy-based gas sensing
    • 基于吸收光谱法的气体感测的多峰测量的背景补偿
    • US07586094B2
    • 2009-09-08
    • US11929525
    • 2007-10-30
    • Xiang LiuXin ZhouAlfred FeitischGregory M. Sanger
    • Xiang LiuXin ZhouAlfred FeitischGregory M. Sanger
    • G01J5/02
    • G01N21/3504G01N21/274G01N21/314G01N21/39G01N2201/1215
    • Concentrations of a target analyte in a gas mixture containing one or more background analytes having potentially interfering spectral absorption features can be calculated by compensating for background analyte absorption at a target wavelength used to quantify the target analyte. Absorption can be measured at a reference wavelength chosen to quantify the concentration of the background analyte. Using a background gas adjustment factor or function, the absorption measured at the reference wavelength can be used to calculate absorption due to the background analyte at the target wavelength and thereby compensate for this background absorption to more accurately calculate the target analyte concentration in real or near real time. Additional background analytes can optionally be compensated for by using one or more additional reference wavelengths.
    • 含有具有潜在干扰光谱吸收特征的一种或多种背景分析物的气体混合物中的目标分析物的浓度可以通过补偿用于量化目标分析物的目标波长的背景分析物吸收来计算。 可以在选择的参考波长处测量吸光度,以量化背景分析物的浓度。 使用背景气体调节因子或功能,可以使用在参考波长处测量的吸收来计算由于目标波长的背景分析物引起的吸收,从而补偿该背景吸收,以更精确地计算实际或近似的目标分析物浓度 即时的。 可以通过使用一个或多个另外的参考波长来可选地补偿附加的背景分析物。
    • 19. 发明申请
    • DYNAMIC RECONSTRUCTION OF A CALIBRATION STATE OF AN ABSORPTION SPECTROMETER
    • 吸收光谱仪校准状态的动态重建
    • US20120099109A1
    • 2012-04-26
    • US13235105
    • 2011-09-16
    • Xiang LiuJohn LewisonWenhai JiAlfred Feitisch
    • Xiang LiuJohn LewisonWenhai JiAlfred Feitisch
    • G01N21/00
    • G01J3/28G01J3/42G01N21/031G01N21/274G01N21/31G01N21/3504G01N21/3518G01N21/39G01N2021/399
    • A reference harmonic absorption curve of a laser absorption spectrometer, which can include a tunable or scannable laser light source and a detector, can have a reference curve shape and can include a first, second, or higher order harmonic signal of a reference signal generated by the detector in response to light passing from the laser light source through a reference gas or gas mixture. The reference gas or gas mixture can include one or more of a target analyte and a background gas expected to be present during analysis of the target analyte. The reference harmonic absorption curve can have been determined for the laser absorption spectrometer in a known or calibrated state. A test harmonic absorption curve having a test curve shape is compared with the reference harmonic absorption curve to detect a difference between the test curve shape and the reference curve shape that exceeds a predefined allowed deviation and therefore indicates a change in an output of the laser light source relative to the known or calibrated state. One or more operating and/or analytical parameters of the laser absorption spectrometer are adjusted to correct the test curve shape to reduce the difference between the test curve shape and the reference curve shape.
    • 可以包括可调谐或可扫描的激光光源和检测器的激光吸收光谱仪的参考谐波吸收曲线可以具有参考曲线形状,并且可以包括由第一,第二或更高次谐波信号产生的参考信号 检测器响应于从激光源通过参考气体或气体混合物的光。 参考气体或气体混合物可以包括目标分析物和预期在目标分析物的分析期间存在的背景气体中的一种或多种。 参考谐波吸收曲线可以在已知或校准状态下为激光吸收光谱仪确定。 将具有测试曲线形状的测试谐波吸收曲线与参考谐波吸收曲线进行比较,以检测超过预定义的允许偏差的测试曲线形状和参考曲线形状之间的差异,因此表示激光输出的变化 源相对于已知或校准状态。 调整激光吸收光谱仪的一个或多个操作和/或分析参数以校正测试曲线形状,以减小测试曲线形状与参考曲线形状之间的差异。