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    • 1. 发明申请
    • METHOD AND APPARATUS FOR THE SPECTROSCOPIC DETECTION OF LOW CONCENTRATIONS OF HYDROGEN SULFIDE GAS
    • 用于检测氢硫化物低浓度的光谱检测方法和装置
    • WO2017040848A1
    • 2017-03-09
    • PCT/US2016/049988
    • 2016-09-01
    • CALIFORNIA INSTITUTE OF TECHNOLOGY
    • VASUDEV, Ramabhadran
    • G01J3/06G01J3/16G01J3/02G01N1/40
    • G01N21/39G01J3/42G01N21/031G01N2201/0698
    • Spectroscopic apparatus and methods incorporating a gas sensor configured to detect low concentration gases, including gases that are hazardous volatiles are provided. Low concentration gases can comprise gases where detection of concentrations on the order of parts-per-million (ppm), and in many embodiments part-per-billion (ppb) is required. The gas may be a species, such as, for example hydrogen sulfide (H 2 S) that may be produced in drilling and/or volcanic eruptions. The spectroscopic apparatus and methods are configured to operate in particular atmospheres where gas detection can be challenging, such as in ambient air and/or in space where various contaminants may be present. The spectroscopic apparatus and methods may incorporate a long path length detector, such as, for example, a cavity-enhanced absorption spectrometer. The methods and apparatus further incorporate a wavelength modulation technique to improve the signal-to-noise ratio.
    • 提供了配置用于检测低浓度气体(包括有害挥发物的气体)的气体传感器的光谱仪和方法。 低浓度气体可以包括气体,其中需要检测百万分之一ppm(ppm)的数量级,并且在许多实施方案中检测浓度为十亿分之一(ppb)。 气体可以是物种,例如可能在钻井和/或火山喷发中产生的硫化氢(H 2 S)。 分光设备和方法被配置为在气体检测可能具有挑战性的特别气氛中操作,例如在环境空气和/或可能存在各种污染物的空间中。 分光装置和方法可以包括长路径长度检测器,例如腔增强吸收光谱仪。 所述方法和装置还包括波长调制技术以提高信噪比。