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    • 10. 发明申请
    • Absorption spectrometer and method for measuring the concentration of a gaseous component of interest in a measurement gas
    • 吸收光谱仪和测量气体中感兴趣的气体组分浓度的方法
    • US20160047739A1
    • 2016-02-18
    • US14823248
    • 2015-08-11
    • Siemens Aktiengesellschaft
    • Ralf BITTER
    • G01N21/31G01N33/00
    • G01N21/31G01J3/433G01N21/3504G01N21/39G01N33/0073G01N2201/061
    • Absorption spectrometer and method for measuring the concentration of a gaseous component of interest in a measurement gas, wherein to compensate influence of changes in an optical path length in the absorption spectrometer on a measured result, light from the laser is modulated with at least one pilot frequency in the MHz range, the measurement signal is analyzed in a phase-sensitive manner for the pilot frequency, phase information obtained during this analysis is compared with phase information obtained during calibration of the absorption spectrometer, where the measured result is corrected as a function of the difference between the two items of phase information. Alternatively, light from the laser is modulated with two pilot frequencies, where signal components contained in the measurement signal with the pilot frequencies are detected in a phase-sensitive manner and the difference between the phase information of the two signal components obtained in this operation is analyzed.
    • 吸收光谱仪和测量气体中感兴趣的气体组分的浓度的方法,其中为了补偿吸收光谱仪中的光程长度的变化对测量结果的影响,来自激光的光由至少一个导频 频率在MHz范围内,以导频的相敏方式分析测量信号,将在该分析期间获得的相位信息与在吸收光谱仪的校准期间获得的相位信息进行比较,其中测量结果被校正为函数 的两个相位信息之间的区别。 或者,来自激光器的光由两个导频调制,其中包含在具有导频的测量信号中的信号分量以相敏性方式被检测,并且在该操作中获得的两个信号分量的相位信息之间的差为 分析