公开(公告)号：US5214593A

公开(公告)日：1993-05-25

申请号：US610416

申请日：1990-11-07

Applicant: Haakon T. Magnussen, Jr. ,  Roy P. Moeller

Inventor： Haakon T. Magnussen, Jr. ,  Roy P. Moeller

IPC: G01N21/27 ,  G01N21/85 ,  G01N30/74

CPC classification number: G01N21/274 ,  G01N21/85 ,  G01N2201/0662 ,  G01N2201/126 ,  G01N30/74

Abstract: A method and accompanying apparatus for automatically extending the linear dynamic absorbance range of absorbance detectors including multi-lightpath flow cells. The absorbance of a reference beam in a relatively short reference path is multiplied by a ratio of the absorbance of a sample beam in a relatively long sample path to the reference path absorbance in developing a relative absorbance for the sample path beyond its linear dynamic range.

Abstract translation: 一种用于自动扩展包括多光路流动池的吸光度检测器的线性动态吸光度范围的方法和伴随装置。 在相对较短的参考路径中的参考光束的吸光度乘以相对长的取样通道中的样品光束的吸光度与参考光路的吸光度之比，使得样品路径的相对吸光度超过其线性动态范围。

公开(公告)号：US4990781A

公开(公告)日：1991-02-05

申请号：US276603

申请日：1988-11-28

Applicant: Theodor Heller

Inventor： Theodor Heller

IPC: G01N21/3504 ,  G01N21/3554

CPC classification number: G01N21/3554 ,  G01N2021/354 ,  G01N2201/0636 ,  G01N2201/0662

Abstract: In a spectroscopically operating infrared hygrometer, beams emitted by the beam source and formed by the lens arrangement disposed in front thereof, are reflected via two pairs of rotating lenses, fixed in two parallel planes which are at a fixed distance from each other, and via a fixed mirror, to the lens arrangement placed in front of the detector and are directed by this lens arrangement to the detector. In this infrared hygrometer the absorption distance change takes place very rapidly, so that it is possible during measurements over longer perids of time, for example, during measurements taken from an airplane, to relate with small time constants the individual measurement values for the two absorption distances continuously. Furthermore, intermediate calibration is not required with this infrared hygrometer.

Abstract translation: 在光谱操作的红外湿度计中，由光束源发射并由设置在其前面的透镜装置形成的光束经由两对旋转透镜反射，两对旋转透镜固定在彼此处于固定距离的两个平行平面中，并且经由 固定的镜子，放置在放置在检测器前面的透镜装置，并被该透镜装置导向检测器。 在这种红外线湿度计中，吸收距离的变化非常快速地发生，因此在长时间的测量中可能会发生，例如在飞机测量期间，与小时间常数相关的两个吸收的各个测量值 距离不断。 此外，该红外湿度计不需要中间校准。

公开(公告)号：US20190137391A1

公开(公告)日：2019-05-09

申请号：US16235384

申请日：2018-12-28

Applicant: Itron, Inc.

Inventor： Mark A. Stambaugh

IPC: G01N21/3518 ,  G01N33/00

CPC classification number: G01N21/3518 ,  G01N21/0303 ,  G01N21/3504 ,  G01N33/0047 ,  G01N2201/062 ,  G01N2201/0662 ,  G01N2201/0686

Abstract: Systems and methods for verifying that light absorption is caused by a targeted gaseous chemical compound. A first transmittance of light, either generated at, or filtered to, a first wavelength range and a second transmittance of light, either generated at, or filtered to, a second wavelength range are measured by first and second photon detectors. A ratio of the first and second measured transmittance is determined and that ratio is compared to a transmittance ratio associated with a targeted gaseous chemical compound to verify that the light absorption is caused by the targeted gaseous chemical compound.

公开(公告)号：US09939374B2

公开(公告)日：2018-04-10

申请号：US14390523

申请日：2013-04-04

Applicant: Dräger Medical GmbH

Inventor： Ralf Buchtal ,  Peter Dreyer ,  Livio Fornasiero

IPC: G01N21/3504 ,  G01J3/26 ,  G01J3/42 ,  G01J3/433

CPC classification number: G01N21/3504 ,  G01J3/26 ,  G01J3/42 ,  G01J3/433 ,  G01N2201/061 ,  G01N2201/0662 ,  G01N2201/068

Abstract: A device for recording an absorption spectrum of a fluid has a radiation source (1) that emits a radiation in a spectral range along a beam path (11), a measuring path (5), along which the radiation passes through the fluid and arranged in the beam path, a tunable Fabry-Perot interferometer (7), arranged in the beam path and transmitting radiation in the spectral range as a displaceable bandpass filter, and a detector (9, 35) measuring the intensity of the radiation in the spectral range. An etalon (3) is arranged for spectral modulation of radiation in the beam path and has a plurality of transmission maxima (17) in the spectral range. The bandpass filter, formed by the Fabry-Perot interferometer (7), is displaceable across the spectral range such that spectral modulation of the radiation by the etalon (3) is measured by the detector (9, 35) as a modulation of radiation intensity over time.

公开(公告)号：US20180045643A1

公开(公告)日：2018-02-15

申请号：US15674308

申请日：2017-08-10

Applicant: Hannu Harjunmaa ,  Enni Harjunmaa

Inventor： Hannu Harjunmaa ,  Enni Harjunmaa

IPC: G01N21/51

CPC classification number: G01N21/51 ,  G01N21/49 ,  G01N21/59 ,  G01N2201/0221 ,  G01N2201/0662

Abstract: A nephelometer for determining the turbidity of a body of fluid in which a light beam is directed as an angled beam through the body and two light detectors measure the intensity of light scatter at two points in the beam. The two measurements are divided and scaled, and then the result is logarithmically amplified and displayed as the turbidity.

公开(公告)号：US09770196B2

公开(公告)日：2017-09-26

申请号：US14091645

申请日：2013-11-27

Applicant: UNIVERSITEIT GENT

Inventor： Roeland Baets ,  Eva Ryckeboer

IPC: A61B5/145 ,  A61B5/1459 ,  G01N21/03 ,  G01N21/27 ,  A61B5/15 ,  A61B5/157 ,  B01L3/00

CPC classification number: A61B5/14532 ,  A61B5/14503 ,  A61B5/1459 ,  A61B5/150022 ,  A61B5/157 ,  A61B2562/04 ,  B01L3/5027 ,  G01N21/03 ,  G01N21/274 ,  G01N2201/0662

Abstract: A sensing system and method for sensing a component in a liquid is disclosed. The system comprises a microfluidic channel, the microfluidic channel comprising a first end and a second end, wherein the microfluidic channel is open at the first end and closed at the second end. The system also comprises at least one measurement sensor positioned adjacent the first end, the measurement sensor being arranged for detecting a measurement signal and a reference sensor positioned in the microfluidic channel adjacent the second end, the reference sensor being arranged for detecting a reference signal of the liquid. The system further is configured for combining the measurement signal and the reference signal so as to filter out background influences.

公开(公告)号：US20160178508A1

公开(公告)日：2016-06-23

申请号：US14975799

申请日：2015-12-20

Applicant: Robert Bosch GmbH

Inventor： Ingo Ramsteiner

IPC: G01N21/31

CPC classification number: G01N21/31 ,  G01N21/314 ,  G01N21/8507 ,  G01N2201/0662 ,  G01N2201/0668

Abstract: A method is used to determine an absorption behavior of a medium. The method includes establishing an absorption coefficient of the medium using a first intensity value and at least one second intensity value and a length different between a first measurement distance and a second measurement distance. The first intensity value represents a measured first light intensity after passing over a first measurement distance in the medium. The second intensity value represents a measured second light intensity after passing over a second measurement distance in the medium. The first intensity value and the second intensity value are measured using light with a common initial intensity.

Abstract translation: 一种方法用于确定介质的吸收行为。 该方法包括使用第一强度值和至少一个第二强度值和在第一测量距离和第二测量距离之间不同的长度建立介质的吸收系数。 第一强度值表示在介质中经过第一测量距离之后测量的第一光强度。 第二强度值表示在介质中经过第二测量距离后的测量的第二光强度。 使用具有共同的初始强度的光来测量第一强度值和第二强度值。

公开(公告)号：US20150300948A1

公开(公告)日：2015-10-22

申请号：US14390523

申请日：2013-04-04

Applicant: Dräger Medical GmbH

Inventor： Ralf BUCHTAL ,  Peter DREYER ,  Livio FORNASIERO

IPC: G01N21/3504 ,  G01J3/42 ,  G01J3/26

CPC classification number: G01N21/3504 ,  G01J3/26 ,  G01J3/42 ,  G01J3/433 ,  G01N2201/061 ,  G01N2201/0662 ,  G01N2201/068

Abstract: A device for recording an absorption spectrum of a fluid has a radiation source (1) that emits a radiation in a spectral range along a beam path (11), a measuring path (5), along which the radiation passes through the fluid and arranged in the beam path, a tunable Fabry-Perot interferometer (7), arranged in the beam path and transmitting radiation in the spectral range as a displaceable bandpass filter, and a detector (9, 35) measuring the intensity of the radiation in the spectral range. An etalon (3) is arranged for spectral modulation of radiation in the beam path and has a plurality of transmission maxima (17) in the spectral range. The bandpass filter, formed by the Fabry-Perot interferometer (7), is displacable across the spectral range such that spectral modulation of the radiation by the etalon (3) is measured by the detector (9, 35) as a modulation of radiation intensity over time.

Abstract translation: 用于记录流体的吸收光谱的装置具有辐射源（1），其沿着光束路径（11）发射光谱范围内的辐射;辐射通过流体的测量路径（5），并布置 在光束路径中，布置在光束路径中的可调谐法布里 - 珀罗干涉仪（7），并且在光谱范围内传输辐射作为可移位带通滤波器，以及检测器（9,35），其测量光谱中的辐射强度 范围。 标准具（3）被布置用于光束路径中的辐射的光谱调制，并且在光谱范围内具有多个透射最大值（17）。 由法布里 - 珀罗干涉仪（7）形成的带通滤波器可在整个光谱范围内置换，使得由标准具（3）辐射的光谱调制由检测器（9,35）测量，作为辐射强度的调制 随着时间的推移。

公开(公告)号：US08785857B2

公开(公告)日：2014-07-22

申请号：US13242677

申请日：2011-09-23

Applicant: Christopher D. Starta ,  Robert E. Uber ,  Thomas Trautzsch ,  Frederick J. Schuler

Inventor： Christopher D. Starta ,  Robert E. Uber ,  Thomas Trautzsch ,  Frederick J. Schuler

IPC: G01J5/02

CPC classification number: G01N21/59 ,  G01N21/3151 ,  G01N21/3504 ,  G01N2201/023 ,  G01N2201/0636 ,  G01N2201/0662

Abstract: A closed path infrared sensor includes an enclosure, a first energy source within the enclosure, at least a second energy source within the enclosure, at least one detector system within the enclosure and a mirror system external to the enclosure and spaced from the enclosure. The mirror system reflects energy from the first energy source to the at least one detector system via a first analytical path and reflects energy from the second energy source to the at least one detector system via a second analytical path. Each of the first analytical path and the second analytical path are less than two feet in length.

Abstract translation: 封闭路径红外传感器包括外壳，外壳内的第一能量源，外壳内的至少第二能量源，外壳内的至少一个检测器系统和外壳外部与外壳隔开的反射镜系统。 反射镜系统经由第一分析路径将来自第一能量源的能量反射到至少一个检测器系统，并且经由第二分析路径将来自第二能量源的能量反射到至少一个检测器系统。 第一分析路径和第二分析路径中的每一条长度小于两英尺。

公开(公告)号：US20130075615A1

公开(公告)日：2013-03-28

申请号：US13242677

申请日：2011-09-23

Applicant: CHRISTOPHER D. STARTA ,  ROBERT E. UBER ,  THOMAS TRAUTZSCH ,  FREDERICK J. SCHULER

Inventor： CHRISTOPHER D. STARTA ,  ROBERT E. UBER ,  THOMAS TRAUTZSCH ,  FREDERICK J. SCHULER

IPC: G01J5/08 ,  G01N21/01

CPC classification number: G01N21/59 ,  G01N21/3151 ,  G01N21/3504 ,  G01N2201/023 ,  G01N2201/0636 ,  G01N2201/0662

Abstract: A closed path infrared sensor includes an enclosure, a first energy source within the enclosure, at least a second energy source within the enclosure, at least one detector system within the enclosure and a mirror system external to the enclosure and spaced from the enclosure. The mirror system reflects energy from the first energy source to the at least one detector system via a first analytical path and reflects energy from the second energy source to the at least one detector system via a second analytical path. Each of the first analytical path and the second analytical path are less than two feet in length.

Abstract translation: 封闭路径红外传感器包括外壳，外壳内的第一能量源，外壳内的至少第二能量源，外壳内的至少一个检测器系统和外壳外部与外壳隔开的反射镜系统。 反射镜系统经由第一分析路径将来自第一能量源的能量反射到至少一个检测器系统，并且经由第二分析路径将来自第二能量源的能量反射到至少一个检测器系统。 第一分析路径和第二分析路径中的每一条长度小于两英尺。