公开(公告)号：US09618391B2

公开(公告)日：2017-04-11

申请号：US14634364

申请日：2015-02-27

Applicant: Spectrasensors, Inc.

Inventor： Alfred Feitisch ,  Xiang Liu ,  Hsu-Hung Huang ,  Wenhai Ji ,  Richard L. Cline

IPC: G01J3/02 ,  G01N21/3504 ,  G01N21/05 ,  G01N21/27 ,  G01J3/42 ,  G01N21/39 ,  G01N21/03

CPC classification number: G01J3/0297 ,  G01J3/42 ,  G01N21/05 ,  G01N21/274 ,  G01N21/3504 ,  G01N21/39 ,  G01N2021/0314 ,  G01N2021/399 ,  G01N2201/1211 ,  G01N2201/1218 ,  G01N2201/127

Abstract: Validation verification data quantifying an intensity of light reaching a detector of a spectrometer from a light source of the spectrometer after the light passes through a validation gas across a known path length can be collected or received. The validation gas can include an amount of an analyte compound and an undisturbed background composition that is representative of a sample gas background composition of a sample gas to be analyzed using a spectrometer. The sample gas background composition can include one or more background components. The validation verification data can be compared with stored calibration data for the spectrometer to calculate a concentration adjustment factor, and sample measurement data collected with the spectrometer can be modified using this adjustment factor to compensate for collisional broadening of a spectral peak of the analyte compound by the background components. Related methods, articles of manufacture, systems, and the like are described.

公开(公告)号：US08711357B2

公开(公告)日：2014-04-29

申请号：US13235105

申请日：2011-09-16

Applicant: Xiang Liu ,  John Lewison ,  Wenhai Ji ,  Alfred Feitisch

Inventor： Xiang Liu ,  John Lewison ,  Wenhai Ji ,  Alfred Feitisch

IPC: 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 reference harmonic absorption curve of a laser absorption spectrometer, which can include a tunable or scannable laser light source and a detector, can have a reference curve shape and can include a first, second, or higher order harmonic signal of 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. The reference harmonic absorption curve can have been determined for the laser absorption spectrometer in a known or calibrated state. 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: 可以包括可调谐或可扫描的激光光源和检测器的激光吸收光谱仪的参考谐波吸收曲线可以具有参考曲线形状，并且可以包括由第一，第二或更高次谐波信号产生的参考信号 检测器响应于从激光源通过参考气体或气体混合物的光。 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。 参考谐波吸收曲线可以在已知或校准状态下为激光吸收光谱仪确定。 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和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：US08355124B2

公开(公告)日：2013-01-15

申请号：US13301707

申请日：2011-11-21

Applicant: Alfred Feitisch ,  Xiang Liu ,  Xin Zhou ,  Dale Langham ,  Charles F. Cook

Inventor： Alfred Feitisch ,  Xiang Liu ,  Xin Zhou ,  Dale Langham ,  Charles F. Cook

IPC: G01J3/00

CPC classification number: G01N21/39 ,  G01N21/3504 ,  G01N21/75 ,  G01N2021/399 ,  Y10T436/20 ,  Y10T436/204998

Abstract: An energy content meter can spectroscopically quantify oxidation products after oxidation of a combustible mixture. The measured oxidation product concentrations or mole fractions can be converted to an energy content of the un-oxidized combustible mixture using a conversion factor that relates oxygen consumption during oxidation of the combustible mixture to the energy content of the combustible mixture.

Abstract translation: 能量含量计可以对可燃混合物氧化后的氧化产物进行光谱定量。 测量的氧化产物浓度或摩尔分数可以转化为未氧化的可燃混合物的能量含量，该转换因子将可燃混合物的氧化期间的氧消耗量与可燃混合物的能量含量相关联。

公开(公告)号：US08155893B2

公开(公告)日：2012-04-10

申请号：US13236310

申请日：2011-09-19

Applicant: Richard L. Cline ,  Xiang Liu ,  Gregory M. Sanger ,  Charles E. Smith ,  Xin Zhou

Inventor： Richard L. Cline ,  Xiang Liu ,  Gregory M. Sanger ,  Charles E. Smith ,  Xin Zhou

IPC: G01N31/00

CPC classification number: G01N21/3504 ,  G01J3/02 ,  G01J3/027 ,  G01J3/4338 ,  G01N21/39 ,  G01N21/85 ,  G01N29/024 ,  G01N33/225 ,  G01N2021/399 ,  G01N2021/8578 ,  G01N2291/02809 ,  G01N2291/02836 ,  G01N2291/02881

Abstract: Thermodynamic properties of a natural gas stream can be determined in real time utilizing modeling algorithms in conjunction with one or more sensors for quantifying physical and chemical properties of the natural gas. A first data signal produced by a first sensor can include intensity as a function of wavelength. At least one region in the wavelength range outside of a selected absorption transition can be fitted to a function to obtain a zero-absorption baseline, and a carbon dioxide concentration can be determined based on a line strength at the selected absorption transition corrected by the zero-absorption baseline. A total hydrocarbon concentration in the gas stream can be inferred based on a database of characteristic natural gas concentrations, and an algorithm can be implemented that determines an energy content of the gas stream. Related techniques, apparatus, systems, and articles are also described.

Abstract translation: 天然气流的热力学性质可以利用建模算法结合一个或多个传感器来实时确定，用于量化天然气的物理和化学性质。 由第一传感器产生的第一数据信号可以包括作为波长的函数的强度。 可以将所选吸收转变以外的波长范围内的至少一个区域拟合到获得零吸收基线的函数上，并且可以基于通过零修正的所选吸收跃迁下的线强度来确定二氧化碳浓度 吸收基线。 可以基于特征天然气浓度的数据库推测气流中的总烃浓度，并且可以实现确定气流的能量含量的算法。 还描述了相关技术，装置，系统和制品。

公开(公告)号：US07728978B2

公开(公告)日：2010-06-01

申请号：US11873723

申请日：2007-10-17

Applicant: Xin Zhou ,  Xiang Liu ,  Gregory M. Sanger

Inventor： Xin Zhou ,  Xiang Liu ,  Gregory M. Sanger

IPC: G01N21/00 ,  G01N21/37

CPC classification number: G01N21/3504 ,  G01N21/031 ,  G01N21/3554 ,  G01N21/39

Abstract: Moisture can be detected in a refrigerant background such as HFC (Hydrofluorocarbon) HFC-134A and HFC-152A and exampled by HFC-23, HFC-32, HFC-143A, HFC-125, HFC-245FA, HFC-227EA, and the like. The system can include a light source operating at any one of several wavelengths within the water absorption bands at wavelengths such as 1.4, 1.9 and 2.7 μm and a detector that measures the transmitted light intensity through the HFC samples. In one variation, the light source is a tunable diode laser and the moisture level is determined by direct absorption and harmonic spectroscopy. Related techniques, apparatus, systems, and articles are also described.

Abstract translation: 可以在制冷剂背景下检测水分，例如HFC（HFC），HFC-134A和HFC-152A，并由HFC-23，HFC-32，HFC-143A，HFC-125，HFC-245FA，HFC-227EA和 喜欢。 该系统可以包括在诸如1.4,1.9和2.7μm的波长的范围内在吸水带内的几个波长中的任何一个处操作的光源和测量通过HFC样品的透射光强度的检测器。 在一个变型中，光源是可调谐二极管激光器，并且通过直接吸收和谐波光谱确定水分含量。 还描述了相关技术，装置，系统和制品。

公开(公告)号：US07586094B2

公开(公告)日：2009-09-08

申请号：US11929525

申请日：2007-10-30

Applicant: Xiang Liu ,  Xin Zhou ,  Alfred Feitisch ,  Gregory M. Sanger

Inventor： Xiang Liu ,  Xin Zhou ,  Alfred Feitisch ,  Gregory M. Sanger

IPC: G01J5/02

CPC classification number: G01N21/3504 ,  G01N21/274 ,  G01N21/314 ,  G01N21/39 ,  G01N2201/1215

Abstract: Concentrations of a target analyte in a gas mixture containing one or more background analytes having potentially interfering spectral absorption features can be calculated by compensating for background analyte absorption at a target wavelength used to quantify the target analyte. Absorption can be measured at a reference wavelength chosen to quantify the concentration of the background analyte. Using a background gas adjustment factor or function, the absorption measured at the reference wavelength can be used to calculate absorption due to the background analyte at the target wavelength and thereby compensate for this background absorption to more accurately calculate the target analyte concentration in real or near real time. Additional background analytes can optionally be compensated for by using one or more additional reference wavelengths.

Abstract translation: 含有具有潜在干扰光谱吸收特征的一种或多种背景分析物的气体混合物中的目标分析物的浓度可以通过补偿用于量化目标分析物的目标波长的背景分析物吸收来计算。 可以在选择的参考波长处测量吸光度，以量化背景分析物的浓度。 使用背景气体调节因子或功能，可以使用在参考波长处测量的吸收来计算由于目标波长的背景分析物引起的吸收，从而补偿该背景吸收，以更精确地计算实际或近似的目标分析物浓度 即时的。 可以通过使用一个或多个另外的参考波长来可选地补偿附加的背景分析物。

公开(公告)号：US07511802B2

公开(公告)日：2009-03-31

申请号：US11726001

申请日：2007-03-19

Applicant: Stevie Horton Smith

Inventor： Stevie Horton Smith

IPC: G01J3/26 ,  G01N21/00

CPC classification number: G01N21/39 ,  G01N21/031 ,  G01N21/35 ,  G01N21/3504 ,  G01N30/74 ,  G01N2201/0691

Abstract: Low concentrations of complex gas mixture components may be detected and quantified using a gas-chromatograph to separate a gas mixture prior to analysis of one or more eluting components using an absorption spectrometer. Substantial reductions in analytical system complexity and improvements in reliability are achieved compared with other commonly used methods for analyzing such complex mixtures.

Abstract translation: 可以使用气相色谱仪来检测和定量低浓度的复杂气体混合物组分，以在使用吸收光谱仪分析一种或多种洗脱组分之前分离气体混合物。 与分析这种复杂混合物的其他常用方法相比，实现了分析系统复杂性的大幅度降低和可靠性的提高。

公开(公告)号：US07166843B2

公开(公告)日：2007-01-23

申请号：US10766327

申请日：2004-01-29

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: G01N21/35

CPC classification number: G01N21/39 ,  G01N21/3504

Abstract: A system and method can detect ethylene oxide in a sample of gas, such as air. The system includes a light source operating at a wavelength where molecules typically found within air absorb light at a substantially lower level than ethylene oxide molecules. Exemplary wavelengths are in the range of approximately 1.6–2.2 μm, and in particular at 1.6 μm, 1.645 μm, 1.692 μm, 2.195 μm, 2.2 μm, 2.216 μm, passes through the sample of gas to be detected by a detector. In one variation, the light source is a tunable diode laser or a VCSEL and the ethylene oxide level is determined using harmonic spectroscopy.

Abstract translation: 系统和方法可以检测气体样品中的环氧乙烷，例如空气。 该系统包括以通常在空气中发现的分子以比环氧乙烷分子基本上更低的水平吸收光的波长操作的光源。 示例性的波长在1.6-2.2μm的范围内，特别是1.6μm，1.645μm，1.692μm，2.195μm，2.2μm，2.216μm，通过检测器检测的气体样品。 在一个变型中，光源是可调二极管激光器或VCSEL，并且使用谐波光谱确定环氧乙烷水平。

公开(公告)号：US20230065553A1

公开(公告)日：2023-03-02

申请号：US17445880

申请日：2021-08-25

Applicant: SpectraSensors, Inc.

Inventor： Marc Winter ,  Xiang Liu ,  Thomas Wilhelm

IPC: G01N21/64 ,  G01N21/39 ,  G01N21/17

Abstract: The present disclosure relates to a device for measuring a first analyte concentration and a second analyte concentration in a measuring medium, the device including: a sample cell; a first light source unit; a first detector unit; a functional element; a second light source unit; a second detector unit; and a control unit adapted to analyze a detected first light for determining a first value representing the concentration of the first analyte in the measuring medium and adapted to analyze a detected third light for determining a second value representing the concentration of the second analyte in the measuring medium. A method of using the device is also disclosed.

公开(公告)号：US11079316B2

公开(公告)日：2021-08-03

申请号：US15065783

申请日：2016-03-09

Applicant: SpectraSensors, Inc.

Inventor： Keith Benjamin Helbley ,  Juergen Dessecker ,  Harald Mueller ,  Nikolai Fink ,  William Boyle ,  Peter Dorn ,  Paulo Silva

IPC: G01N21/31 ,  G01N21/3504 ,  G01N21/39 ,  G01J1/42 ,  G01N33/00 ,  H02H9/00

Abstract: A laser spectrometer can be operated for analysis of one or more analytes present in a combustible gas mixture. The spectrometer can include one or more features that enable intrinsically safe operation. In other words, electrical, electronic, thermal, and/or optical energy sources can be limited within an hazardous are of the spectrometer where it is possible for an explosive gas mixture to exist. Methods, systems, articles and the like are described.