-
公开(公告)号：US07132661B2
公开(公告)日：2006-11-07
申请号：US10688723
申请日：2003-10-16
Applicant: Randy Dean May
Inventor： Randy Dean May
CPC classification number: G01J3/4338 , G01N21/05 , G01N21/3504 , G01N21/3554 , G01N21/39 , G01N2021/354 , G01N2021/399
Abstract: A system and method are disclosed for the detection of water vapor in a natural gas background. The system includes a light source operating in a wavelength range such as, 1.877–1.901 μm, 2.711–2.786 μm, or 920–960 nm, passes through the natural gas to be detected by a detector. In one embodiment, the light source is a tunable diode laser and the moisture level is determined by harmonic spectroscopy. In other embodiments, a VCSEL laser is utilized.
-
公开(公告)号：US20210318280A1
公开(公告)日：2021-10-14
申请号：US16842849
申请日：2020-04-08
Applicant: SpectraSensors, Inc.
Inventor： Kevin Ludlum , Marc Winter , Benjamin Scherer , Xiang Liu
Abstract: The present disclosure relates to a computer-implemented method for forecasting calibration spectra including a step of providing a machine learning model trained using historical calibration data corresponding to different gas species at different pressures. The computer-implemented method also includes steps of performing a calibration scan of one gas species at one pressure using an analyzer and generating calibration curves for the analyzer corresponding to one or multiple gas species at multiple pressures using the machine learning model and the calibration scan. Thereafter, a spectrum is obtained using the analyzer, and a concentration measurement is generated using the spectrum and at least one of the calibration curves.
-
公开(公告)号：US20210018433A1
公开(公告)日：2021-01-21
申请号：US16511429
申请日：2019-07-15
Applicant: SpectraSensors, Inc.
Inventor： Xiang Liu , Alfred Feitisch , Gary Yeh , Chih-Hsuan Chang
Abstract: A method for implementation by a laser spectrometer is provided. The method includes first scanning, by a control unit using a first set of laser spectrometer operating parameters, a first wavelength range by adjusting a wavelength of light of a beam emitted by a laser light source and passing through a sample gas. The first wavelength range encompasses a first spectral feature corresponding to a first constituent. The method also includes at least one second scanning, by the control unit using a second set of laser spectrometer operating parameters, a second wavelength range by adjusting the wavelength of light emitted from the laser light source and passing through the sample gas. The second wavelength range has a second spectral feature corresponding to at least one second constituent. The control unit also determines a first concentration of the first constituent and a second concentration of the at least one second constituent.
-
公开(公告)号：US09816860B2
公开(公告)日：2017-11-14
申请号：US14466819
申请日：2014-08-22
Applicant: SpectraSensors, Inc.
Inventor： Alfred Feitisch , Xiang Liu , Keith Benjamin Helbley , Douglas Beyer
CPC classification number: G01J3/0205 , G01J3/0237 , G01J3/027 , G01J3/0278 , G01J3/0291 , G01J3/42 , G01J2003/421 , G01N21/31 , G01N2201/06113 , G01N2201/062
Abstract: A spectrometer includes a light source that emits a beam into a sample volume comprising an absorbing medium. Thereafter, at least one detector detects at least a portion of the beam emitted by the light source. It is later determined, based on the detected at least a portion of the beam and by a controller, that a position and/or an angle of the beam should be changed. The beam emitted by the light source is then actively steered by an actuation element under control of the controller. In addition, a concentration of the absorbing media can be quantified or otherwise calculated (using the controller or optionally a different processor that can be local or remote). The actuation element(s) can be coupled to one or more of the light source, a detector or detectors, and a reflector or reflectors intermediate the light source and the detector(s).
-
35.发明授权公开(公告)号：US09360415B2
公开(公告)日：2016-06-07
申请号：US14263942
申请日：2014-04-28
Applicant: SpectraSensors, Inc.
Inventor： Xiang Liu , John Lewison , Wenhai Ji , Alfred Feitisch
IPC: G01N21/00 , G01N21/27 , G01N21/39 , G01N21/3504 , G01J3/28 , G01J3/42 , G01N21/03 , G01N21/31 , G01N21/3518
CPC classification number: G01N21/274 , G01J3/28 , G01J3/42 , G01N21/031 , G01N21/31 , G01N21/3504 , G01N21/3518 , G01N21/39 , G01N2021/399
Abstract: A reference harmonic absorption curve of a laser absorption spectrometer can have a reference curve shape derived from 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. 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. 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.
Abstract translation: 激光吸收光谱仪的参考谐波吸收曲线可以具有根据由检测器响应于从激光源通过参考气体或气体混合物的光而产生的参考信号导出的参考曲线形状。 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。 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，以检测测试曲线形状与参考曲线形状之间的差异。 调整激光吸收光谱仪的操作和/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。
-
Patent Agency Ranking
公开(公告)号：US08842282B2
公开(公告)日：2014-09-23
申请号：US13712923
申请日：2012-12-12
Applicant: Lutz Keller , Alfred Feitisch , Peter Scott , Mathias Schrempel , Nathan St. John
Inventor： Lutz Keller , Alfred Feitisch , Peter Scott , Mathias Schrempel , Nathan St. John
CPC classification number: G01N21/0303 , G01J3/42 , G01N21/031 , G01N21/09 , G01N21/3504
Abstract: A spectrometer cell can include a spacer, at least one end cap, and at least one mirror with a reflective surface. The end cap can be positioned proximate to a first contact end of the spacer such that the end cap and spacer at least partially enclose an internal volume of the spectrometer cell. The mirror can be secured in place by a mechanical attachment that includes attachment materials that are chemically inert to at least one reactive gas compound. The mechanical attachment can hold an optical axis of the reflective surface in a fixed orientation relative to other components of the spectrometer cell and or a spectrometer device that comprises the spectrometer cell. The mirror can optionally be constructed of a material such as stainless steel, ceramic, or the like. Related methods, articles of manufacture, systems, and the like are described.
Abstract translation: 光谱仪单元可以包括间隔物，至少一个端盖和至少一个具有反射表面的反射镜。 端盖可以定位成靠近隔离物的第一接触端，使得端盖和间隔件至少部分地包围光谱仪单元的内部体积。 镜子可以通过机械附件固定在适当的位置，该机械附件包括对至少一种反应性气体化合物具有化学惰性的附着材料。 机械附件可以将反射表面的光轴相对于分光计单元的其他部件和包括光谱仪单元的光谱仪装置固定在一定方向。 镜子可以任意地由诸如不锈钢，陶瓷等的材料构成。 描述了相关方法，制品，系统等。
-
37.发明申请公开(公告)号：US20140253922A1
公开(公告)日：2014-09-11
申请号：US14263942
申请日：2014-04-28
Applicant: SpectraSensors, Inc.
Inventor： Xiang Liu , John Lewison , Wenhai Ji , Alfred Feitisch
CPC classification number: G01N21/274 , G01J3/28 , G01J3/42 , G01N21/031 , G01N21/31 , G01N21/3504 , G01N21/3518 , G01N21/39 , G01N2021/399
Abstract: A reference harmonic absorption curve of a laser absorption spectrometer can have a reference curve shape derived from 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. 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. 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.
Abstract translation: 激光吸收光谱仪的参考谐波吸收曲线可以具有根据由检测器响应于从激光源通过参考气体或气体混合物的光而产生的参考信号导出的参考曲线形状。 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。 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，以检测测试曲线形状与参考曲线形状之间的差异。 调整激光吸收光谱仪的操作和/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。
-
公开(公告)号：US08500849B2
公开(公告)日：2013-08-06
申请号：US13428626
申请日：2012-03-23
Applicant: Xin Zhou , Xiang Liu , Alfred Feitisch , Gregory M. Sanger
Inventor： Xin Zhou , Xiang Liu , Alfred Feitisch , Gregory M. Sanger
IPC: B01D59/26
CPC classification number: G01N21/3504 , G01N2021/3545 , G01N2021/399 , G01N2201/1215
Abstract: 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.
Abstract translation: 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。
-
公开(公告)号：US07819946B2
公开(公告)日：2010-10-26
申请号：US12763124
申请日：2010-04-19
Applicant: Xin Zhou , Xiang Liu , Alfred Feitisch , Gregory M. Sanger
Inventor： Xin Zhou , Xiang Liu , Alfred Feitisch , Gregory M. Sanger
IPC: B01D59/26
CPC classification number: G01N21/3504 , G01N2021/3545 , G01N2021/399 , G01N2201/1215
Abstract: 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.
-
公开(公告)号：US07704301B2
公开(公告)日：2010-04-27
申请号：US12101890
申请日：2008-04-11
Applicant: Xin Zhou , Xiang Liu , Alfred Feitisch , Gregory M. Sanger
Inventor： Xin Zhou , Xiang Liu , Alfred Feitisch , Gregory M. Sanger
IPC: B01D59/26
CPC classification number: G01N21/3504 , G01N2021/3545 , G01N2021/399 , G01N2201/1215
Abstract: 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.
Abstract translation: 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。
-
-
-
-
-
-
-
-
-
Search Results
62
records
(took 0.023 seconds)
