公开(公告)号：US10156513B2

公开(公告)日：2018-12-18

申请号：US14807859

申请日：2015-07-23

Applicant: SpectraSensors, Inc.

Inventor： Peter Scott ,  Alfred Feitisch ,  Peter Dorn ,  Adam S. Chaimowitz ,  Hsu-Hung Huang ,  Mathias Schrempel ,  Lutz Keller

IPC: G01N21/31 ,  G01N21/03 ,  G01J3/42 ,  G01N21/27 ,  G01N21/01 ,  G01N21/05

Abstract: A sample cell can be designed to minimize excess gas volume. Described features can be advantageous in reducing an amount of gas required to flow through the sample cell during spectroscopic measurements, and in reducing a time (e.g. a total volume of gas) required to flush the cell between sampling events. In some examples, contours of the inners surfaces of the sample cell that contact the contained gas can be shaped, dimensioned, etc. such that a maximum clearance distance is provided between the inner surfaces at one or more locations. Systems, methods, and articles, etc. are described.

公开(公告)号：US09696204B2

公开(公告)日：2017-07-04

申请号：US14817119

申请日：2015-08-03

Applicant: SpectraSensors, Inc.

Inventor： Xiang Liu ,  Gary Yeh ,  Adam S. Chaimowitz ,  William Jenko ,  Alfred Feitisch

IPC: G01J3/00 ,  G01J3/28

CPC classification number: G01J3/28 ,  G01J2003/283 ,  G01J2003/2866 ,  G01N21/274 ,  G01N21/39

Abstract: A frequency registration deviation is quantified for a field spectrum collected during analysis by a spectroscopic analysis system of a sample fluid when the spectroscopic analysis system has deviated from a standard calibration state. The field spectrum is corrected based on the frequency registration deviation using at least one spectral shift technique, and a concentration is calculated for at least one analyte represented by the field spectrum using the corrected field spectrum. Related systems, methods, and articles are described.

公开(公告)号：US08358417B2

公开(公告)日：2013-01-22

申请号：US13026921

申请日：2011-02-14

Applicant: Alfred Feitisch ,  Lutz Keller ,  Xiang Liu ,  Mathias Schrempel ,  Keith Benjamin Helbley

Inventor： Alfred Feitisch ,  Lutz Keller ,  Xiang Liu ,  Mathias Schrempel ,  Keith Benjamin Helbley

IPC: G01J3/28 ,  G01N21/00

CPC classification number: G01J3/28 ,  G01J3/42 ,  G01N21/031 ,  G01N21/274 ,  G01N21/31 ,  G01N21/3504 ,  G01N21/3518 ,  G01N21/39 ,  G01N2021/399

Abstract: A valid state of an analytical system that includes a light source and a detector can be verified by determining that deviation of first light intensity data quantifying a first intensity of light received at the detector from the light source after the light has passed at least once through each of a reference gas in a validation cell and a zero gas from a stored data set does not exceed a pre-defined threshold deviation. The stored data set can represent at least one previous measurement collected during a previous instrument validation process performed on the analytical system. The reference gas can include a known amount of an analyte. A concentration of the analyte in a sample gas can be determined by correcting second light intensity data quantifying a second intensity of the light received at the detector after the light passes at least once through each of the reference gas in the validation cell and a sample gas containing an unknown concentration of the analyte compound. Related systems, methods, and articles of manufacture are also described.

Abstract translation: 包括光源和检测器的分析系统的有效状态可以通过确定在光已经通过至少一次通过之后量化在检测器处接收的第一光强度的光的第一光强度数据与来自光源的偏差 验证单元中的参考气体和来自存储的数据组的零气体中的每一个不超过预定义的阈值偏差。 存储的数据集可以表示在分析系统上执行的先前的仪器验证过程期间收集的至少一个以前的测量。 参考气体可以包括已知量的分析物。 样品气体中分析物的浓度可以通过校正第二光强度数据来确定，该第二光强度数据在光通过至少一次通过验证单元中的每个参考气体之后，量化在检测器处接收的光的第二强度，并且样品气体 含有未知浓度的分析物。 还描述了相关系统，方法和制品。

公开(公告)号：US08154728B2

公开(公告)日：2012-04-10

申请号：US12347368

申请日：2008-12-31

Applicant: Xuejiao Hu ,  Alfred Feitisch

Inventor： Xuejiao Hu ,  Alfred Feitisch

IPC: G01N21/00 ,  H01S3/04

CPC classification number: G01N21/39 ,  G01N2201/022 ,  G01N2201/023 ,  G01N2201/0231

Abstract: Thermally controlled enclosures that can be used with gas analyzers are described. The enclosures incorporate one or more phase changing materials that buffer ambient and internal heat loads to reduce the power consumption demand of mechanical or electronic heating apparatus. Maintenance of gas analyzer equipment at a consistent temperature can be important to achieving stable and reproducible results. Related systems, apparatus, methods, and/or articles are also described.

Abstract translation: 描述了可用于气体分析仪的热控制外壳。 外壳采用缓冲环境和内部热负荷的一种或多种相变材料，以减少机械或电子加热设备的功耗需求。 在一致的温度下维护气体分析仪设备对于获得稳定和可重现的结果是重要的。 还描述了相关系统，装置，方法和/或制品。

公开(公告)号：US08152900B2

公开(公告)日：2012-04-10

申请号：US12911666

申请日：2010-10-25

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：US07504631B2

公开(公告)日：2009-03-17

申请号：US11586897

申请日：2006-10-25

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: G01J5/02

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.

Abstract translation: 公开了一种在天然气背景下检测水蒸气的系统和方法。 该系统包括在诸如1.877-1.901mum，2.711-2.786mum或920-960nm的波长范围内工作的光源，通过检测器检测的天然气。 在一个实施例中，光源是可调二极管激光器，并且通过谐波光谱确定湿度水平。 在其他实施例中，使用VCSEL激光器。

公开(公告)号：US20080225296A1

公开(公告)日：2008-09-18

申请号：US11724665

申请日：2007-03-14

Applicant: Xiang Liu ,  Xin Zhou ,  Alfred Feitisch ,  Greg Sanger

Inventor： Xiang Liu ,  Xin Zhou ,  Alfred Feitisch ,  Greg Sanger

IPC: G01N21/00

CPC classification number: G01N21/39 ,  G01J3/433 ,  G01N21/3504 ,  G01N2021/3513 ,  G01N2021/354 ,  G01N2021/399 ,  G01N2201/1218

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20080123712A1

公开(公告)日：2008-05-29

申请号：US11818617

申请日：2007-06-14

Applicant: Xin Zhou ,  Gregory M. Sanger

Inventor： Xin Zhou ,  Gregory M. Sanger

IPC: H01S3/22

CPC classification number: G01N21/39 ,  G01N21/05 ,  G01N2021/354 ,  G01N2021/399

Abstract: Low concentrations of water vapor in a gas stream 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.

Abstract translation: 可以使用红外光谱区域中的吸收光谱来检测和定量气流中的低浓度水蒸汽。 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。

公开(公告)号：US20070246653A1

公开(公告)日：2007-10-25

申请号：US11715599

申请日：2007-03-07

Applicant: Xin Zhou

Inventor： Xin Zhou

IPC: G01J5/02

CPC classification number: G01N21/3554 ,  G01J3/02 ,  G01J3/027 ,  G01J3/42 ,  G01J3/4338 ,  G01N21/031 ,  G01N21/0332 ,  G01N21/3504 ,  G01N21/39 ,  G01N33/0036 ,  G01N33/22

Abstract: Low concentrations of water vapor within a background of one or more olefin gases may be detected and quantified using a differential absorption spectrometer. A dehydrated sample of the gas is used as a background sample whose absorption spectrum allows elimination of absorption features not due to water vapor in the gas. Absorption spectra may recorded using tunable diode lasers as the light source. these lasers may have a wavelength bandwidth that is narrower than the water vapor absorption feature used for the differential absorption spectral analysis.

Abstract translation: 可以使用差示吸收光谱仪检测和定量在一种或多种烯烃气体背景下的低浓度水蒸气。 将脱气的气体样品用作背景样品，其吸收光谱允许消除不是由于气体中的水蒸气引起的吸收特征。 可以使用可调谐二极管激光器作为光源记录吸收光谱。 这些激光器可以具有比用于差分吸收光谱分析的水蒸气吸收特征窄的波长带宽。

公开(公告)号：US20060268948A1

公开(公告)日：2006-11-30

申请号：US11402484

申请日：2006-04-11

Applicant: Randy May

Inventor： Randy May

IPC: H01S3/10

CPC classification number: G01J3/02 ,  G01J3/0286 ,  G01J3/26 ,  G01J3/28 ,  G01J9/00 ,  H01S3/1303 ,  H01S5/0014 ,  H01S5/0617 ,  H01S5/0687 ,  H01S5/4087

Abstract: The method and system operate to maintain a widely tunable laser (WTL) at a selected transmission wavelength. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a transmission line for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector to determine the power of the beam. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift attributable to the etalon.