公开(公告)号：US20240094122A1

公开(公告)日：2024-03-21

申请号：US18370034

申请日：2023-09-19

Applicant: SICK AG

Inventor： Thomas BEYER ,  Julian EDLER

IPC: G01N21/39 ,  G01J3/433

CPC classification number: G01N21/39 ,  G01J3/4338 ,  G01N2201/121 ,  G01N2201/1273

Abstract: The invention relates to a method for measuring a concentration of a gas in a gas mixture, said method comprising that: a light beam modulated in a ramp shape and/or in a step shape in its wavelength and additionally periodically modulated, in particular in its wavelength, is transmitted from a light source, in particular a laser, into a measurement zone; the modulated light beam passes through a gas mixture in the measurement zone and is detected as reception light by a detector, wherein the reception light is converted by the detector into a detector signal; a derivative signal is determined based on the detector signal by performing a transformation of the detector signal into the frequency range, in particular by a Fourier transform of the detector signal, wherein an evaluation of the detector signal transformed into the frequency range is performed, in particular only, for an n-fold of the frequency of the modulated light beam in order to obtain the derivative signal; and at least two measurement values of a phase of the derivative signal are determined and a correction function is calculated based on the determined measurement values of the phase of the derivative signal in order to correct the derivative signal with the correction function.

公开(公告)号：US20140299774A1

公开(公告)日：2014-10-09

申请号：US14220313

申请日：2014-03-20

Applicant: SICK AG

Inventor： Jurgen KAUFMANN ,  Thomas BEYER ,  Julian EDLER

IPC: G01J3/10

CPC classification number: G01J3/108 ,  G01J1/4257 ,  G01J3/0229 ,  G01J3/42

Abstract: A spectrometer has a first and second light sources (12, 14) which generate light radiation (24) in a first and second wavelength ranges, and a mirror unit (16) for deflecting the light radiation (24, 26) into a measurement path (18), arranged so that the radiation of both wavelength ranges (24, 26) runs through on the same optical path. A detector (20) detects radiation (24, 26) running through the measurement path (18) and an evaluation unit (22) evaluates the radiation (24, 26) incident at the detector (20) and for determining a concentration of a measurement gas component present in the measurement path (18). The mirror unit (16) is configured as a micromirror array (32) and that a single micromirror (34) only deflects a portion of the radiation (24, 26).

Abstract translation: 光谱仪具有在第一和第二波长范围内产生光辐射（24）的第一和第二光源（12,14）和用于将光辐射（24,26）偏转成测量路径的反射镜单元（16） （18），布置成使得两个波长范围（24,26）的辐射在相同的光路上延伸。 检测器（20）检测穿过测量路径（18）的辐射（24,26），并且评估单元（22）评估入射在检测器（20）处的辐射（24,26），并且用于确定测量的浓度 存在于测量路径（18）中的气体成分。 镜单元（16）被配置为微镜阵列（32），并且单个微反射镜（34）仅偏转一部分辐射（24,26）。

公开(公告)号：US20170045446A1

公开(公告)日：2017-02-16

申请号：US15223726

申请日：2016-07-29

Applicant: SICK AG

Inventor： Thomas BEYER ,  Julian EDLER

IPC: G01N21/39 ,  G01J3/433

CPC classification number: G01N21/39 ,  G01J3/10 ,  G01J3/433 ,  G01J2003/4332 ,  G01N2021/399 ,  G01N2201/12

Abstract: The invention relates to a method and to a spectrometer for determining the concentration of a gas component, wherein a light source of the spectrometer is operated as in WMS and thus a determination of the concentration can also take place in accordance with WMS and the measured data can, however, additionally be processed, namely a sorting takes place on the time axis, such that the concentration can be determined using the methods of DAS.

Abstract translation: 本发明涉及一种用于确定气体组分浓度的方法和光谱仪，其中光谱仪的光源像WMS那样操作，因此也可以根据WMS和测量数据进行浓度测定 然而，可以另外处理，即在时间轴上进行排序，使得可以使用DAS的方法确定浓度。

公开(公告)号：US20180156664A1

公开(公告)日：2018-06-07

申请号：US15828512

申请日：2017-12-01

Applicant: SICK AG

Inventor： Julian EDLER ,  Thomas BEYER ,  Samson FRANK

IPC: G01J3/51 ,  G02B27/10 ,  G01J3/18

CPC classification number: G01J3/51 ,  G01J3/027 ,  G01J3/10 ,  G01J3/18 ,  G01J3/42 ,  G01N21/274 ,  G01N21/39 ,  G01N2021/399 ,  G02B27/10 ,  H01S3/1305

Abstract: A method of securing a modulation range of a wavelength-variable radiation source as part of the measurement of an absorption line of a substance comprises: the radiation source being controlled to transmit radiation such that the wavelength of the radiation runs through the modulation range in accordance with a time pattern; the radiation being filtered by means of a filter in whose pass band the absorption line is disposed and which has at least one filter flank whose actual wavelength is within the modulation range; a spectrum of the filtered radiation being determined in that the intensity of the filtered radiation is detected with respect to the time pattern; and a determination being made whether the spectrum has the at least one filter flank.

公开(公告)号：US20140067282A1

公开(公告)日：2014-03-06

申请号：US14013788

申请日：2013-08-29

Applicant: SICK AG

Inventor： Thomas BEYER ,  Julian EDLER

IPC: G01N21/25

CPC classification number: G01N21/255 ,  G01J3/28 ,  G01J3/433 ,  G01N21/274 ,  G01N21/3504 ,  G01N21/39 ,  G01N2021/399 ,  G01N2201/0691 ,  G01N2201/1211 ,  G01N2201/1215 ,  G01N2201/1218

Abstract: A method of determining a concentration of a gas in a sample and/or of the composition of a gas by means of a spectrometer includes measuring an absorption signal of the gas as a function of the wavelength. The wavelength substantially continuously runs through a wavelength range and is superimposed by a harmonic wavelength modulation, wherein the influence of the wavelength modulation on the absorption signal via the light source modulation properties and the detection properties of the spectrometer is dependent on the device properties of the respective spectrometer. The method includes converting the absorption signal into at least one first derivative signal; deriving a gas concentration measurement parameter from the first derivative signal; determining the concentration and/or composition of the gas from at least the gas concentration measurement parameter and from a calibration function compensating for influences of state variables of the gas and of the spectrometer properties.

Abstract translation: 通过光谱仪测定样品和/或气体组成中的气体的浓度的方法包括测量作为波长的函数的气体的吸收信号。 波长基本上连续地穿过波长范围并通过谐波波长调制叠加，其中波长调制对吸收信号的影响经由光源调制性质和光谱仪的检测特性取决于器件的性质 各自的光谱仪。 该方法包括将吸收信号转换成至少一个一阶导数信号; 从一阶导数信号导出气体浓度测量参数; 从至少气体浓度测量参数和补偿气体的状态变量和光谱仪性质的影响的校准函数确定气体的浓度和/或组成。

公开(公告)号：US20160377536A1

公开(公告)日：2016-12-29

申请号：US15192120

申请日：2016-06-24

Applicant: SICK AG

Inventor： Thomas BEYER ,  Julian EDLER

IPC: G01N21/39

CPC classification number: G01N21/39 ,  G01J2003/423 ,  G01J2003/4332 ,  G01N21/031 ,  G01N33/0062 ,  G01N2021/399 ,  G01N2201/0691

Abstract: The invention relates to a method of determining the concentration of a gas component comprising the steps: generating and guiding a light beam having a wavelength variable in a wavelength range through a measurement volume in which the gas component having an absorption in the wavelength range is present; tuning the wavelength range; detecting the intensity of the light beam after passage through the measurement volume; storage of measurement points during the tuning that respectively consist of a point in time and an associated intensity value, to obtain a direct absorption line; generating an artificial measurement curve from the stored measurement points by shifting the measurement points on the time axis; wherein the shift takes place so that an artificial modulation results in the wavelength time extent; and evaluating the artificial measurement curve in accordance with the method of the wavelength modulation spectroscopy and determining a first concentration value therefrom.

公开(公告)号：US20140340684A1

公开(公告)日：2014-11-20

申请号：US14279369

申请日：2014-05-16

Applicant: Sick AG

Inventor： Julian EDLER ,  Thomas BEYER ,  Rolf DISCH

IPC: G01N21/39

CPC classification number: G01N21/39 ,  G01J3/433 ,  G01J3/4338 ,  G01N21/274 ,  G01N21/3504 ,  G01N21/3554 ,  G01N2021/399 ,  G01N2201/0691 ,  G01N2201/1211 ,  G01N2201/1215 ,  G01N2201/1218

Abstract: A method of determining a concentration of a gas in a sample and/or the composition of a gas using a spectrometer comprises the transmitting of radiation whose wavelength substantially continuously runs through a wavelength range, wherein the continuous running through of the wavelength range is overlaid by a wavelength modulation; the measuring of an absorption signal from the absorption of the radiation by the gas as a function of the wavelength of the radiation; the converting of the absorption signal into a first and a second derivative signal; the deriving of a first measured gas concentration value from the first derivative signal and of a second measured gas concentration value from the second derivative signal; and the determining of the concentration and/or the composition of the gas from at least the first measured gas concentration value, wherein the wavelength modulation is adapted in response to a change of a state variable of the gas such that a ratio between the first measured gas concentration value and the second measured gas concentration value is kept substantially constant.

Abstract translation: 使用光谱仪确定样品中气体浓度和/或气体组成的方法包括传输其波长基本上连续穿过波长范围的辐射，其中波长范围的连续穿过被覆盖在 波长调制; 通过气体吸收辐射的吸收信号作为辐射波长的函数的测量; 将吸收信号转换成第一和第二导数信号; 从所述一阶导数信号导出第一测量气体浓度值和从所述二阶导数信号得到第二测量气体浓度值; 以及从至少第一测量气体浓度值确定气体的浓度和/或组成，其中响应于气体的状态变量的变化而调整波长调制，使得第一测量的气体浓度值 气体浓度值和第二测量气体浓度值保持基本上恒定。