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公开(公告)号：US20080225296A1
公开(公告)日：2008-09-18
申请号：US11724665
申请日：2007-03-14
申请人： Xiang Liu , Xin Zhou , Alfred Feitisch , Greg Sanger
发明人： Xiang Liu , Xin Zhou , Alfred Feitisch , Greg Sanger
IPC分类号： G01N21/00
CPC分类号： G01N21/39 , G01J3/433 , G01N21/3504 , G01N2021/3513 , G01N2021/354 , G01N2021/399 , G01N2201/1218
摘要： A system includes a light source, a detector, at least one pressure sensor, and a control unit. The light source emits light at a wavelength substantially corresponding to an absorption line of a target gas. The detector is positioned to detect the intensity of light emitted from the light source that has passed through the target gas. The pressure sensor detects the pressure of the target gas. The control circuit is coupled to the detector and the light source to adjust the modulation amplitude of the light source based on the pressure detected by the at least one pressure sensor. Related systems, apparatus, methods, and/or articles are also described.
摘要翻译： 系统包括光源，检测器，至少一个压力传感器和控制单元。 光源以基本对应于目标气体的吸收线的波长发射光。 检测器被定位成检测从已经通过目标气体的光源发射的光的强度。 压力传感器检测目标气体的压力。 控制电路耦合到检测器和光源，以基于由至少一个压力传感器检测到的压力来调节光源的调制幅度。 还描述了相关系统，装置，方法和/或制品。
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公开(公告)号：US07508521B2
公开(公告)日：2009-03-24
申请号：US11724665
申请日：2007-03-14
申请人： Xiang Liu , Xin Zhou , Alfred Feitisch , Greg Sanger
发明人： Xiang Liu , Xin Zhou , Alfred Feitisch , Greg Sanger
CPC分类号： G01N21/39 , G01J3/433 , G01N21/3504 , G01N2021/3513 , G01N2021/354 , G01N2021/399 , G01N2201/1218
摘要： A system includes a light source, a detector, at least one pressure sensor, and a control unit. The light source emits light at a wavelength substantially corresponding to an absorption line of a target gas. The detector is positioned to detect the intensity of light emitted from the light source that has passed through the target gas. The pressure sensor detects the pressure of the target gas. The control circuit is coupled to the detector and the light source to adjust the modulation amplitude of the light source based on the pressure detected by the at least one pressure sensor. Related systems, apparatus, methods, and/or articles are also described.
摘要翻译： 系统包括光源，检测器，至少一个压力传感器和控制单元。 光源以基本对应于目标气体的吸收线的波长发射光。 检测器被定位成检测从已经通过目标气体的光源发射的光的强度。 压力传感器检测目标气体的压力。 控制电路耦合到检测器和光源，以基于由至少一个压力传感器检测到的压力来调节光源的调制幅度。 还描述了相关系统，装置，方法和/或制品。
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公开(公告)号：US20070259440A1
公开(公告)日：2007-11-08
申请号：US11788757
申请日：2007-04-19
申请人： Xin Zhou , Greg Sanger
发明人： Xin Zhou , Greg Sanger
IPC分类号： G01N33/00
CPC分类号： G01N33/0047 , G01N21/05 , G01N21/3504 , G01N21/39 , G01N33/004 , Y02A50/244 , Y10T436/214
摘要： Low concentrations of methane in a gas mixture containing a substantial concentration of carbon dioxide can be detected and quantified using absorption spectroscopy in the infrared spectral region. Absorption spectra can recorded using tunable diode lasers as the light source. Modulation of the laser signal and demodulation of the resultant detector response yields dependable measurements that may be conducted with very little maintenance in demanding environments.
摘要翻译： 含有大量二氧化碳的气体混合物中的低浓度甲烷可利用红外光谱区域的吸收光谱检测和定量。 使用可调谐二极管激光器作为光源记录吸收光谱。 激光信号的调制和所得到的检测器响应的解调产生可靠的测量，可以在苛刻环境中进行很少的维护。
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