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    Method and apparatus for transient temperature compensation in gas analyzer equipment
    273.
    发明公开
    Method and apparatus for transient temperature compensation in gas analyzer equipment 失效
    瓦尔萨利翁的Verfahren und Vorrichtung zur Kompensation von Temperatur-Transienten。

    公开(公告)号：EP0651244A1

    公开(公告)日：1995-05-03

    申请号：EP94308089.5

    申请日：1994-11-02

    Applicant: INSTRUMENTARIUM CORPORATION

    Inventor： Meriläinen, Timo ,  Rantala, Börje ,  Weckström, Kurt

    IPC: G01N21/35

    CPC classification number: G01N21/3504 ,  G01N2201/0231 ,  G01N2201/1211

    Abstract: The invention relates to a method and apparatus for temperature compensation in gas analyzer equipment for transient error caused by temperature change. According to the method, a radiation source (1) is used for transmitting electromagnetic radiation through a gas mixture to be analyzed, the intensity of radiation transmitted through the gas mixture being analyzed is detected by means of a thermal detector (4) comprising a radiation detecting sensor element (16) and a reference sensor element (17) for generating an output signal proportional to the concentration of gas being analyzed, the temperature of said thermal detector (4) is measured either directly or indirectly, the measured detector temperature values are recorded as a function of time, and the output signal of the thermal detector (4) is temperature compensated by a correction term dependent on the temperature rate of change (DT) of the thermal detector. According to the invention, the uncorrected output signal V meas of the thermal detector (4) is temperature compensated by adding a correction term V comp dependent on the temperature rate of change (DT) of the thermal detector to said output signal.

    Abstract translation: 本发明涉及一种气体分析仪设备温度补偿方法和装置，用于温度变化引起的瞬态误差。 根据该方法，辐射源（1）用于通过待分析的气体混合物传输电磁辐射，通过被分析的气体混合物传播的辐射的强度通过包括辐射的热检测器（4）来检测 检测传感器元件（16）和参考传感器元件（17），用于产生与被分析的气体浓度成比例的输出信号，所述热检测器（4）的温度直接或间接测量，测量的检测器温度值 作为时间的函数记录，并且热检测器（4）的输出信号由取决于热检测器的温度变化率（DT）的校正项进行温度补偿。 根据本发明，热检测器（4）的未校正的输出信号Vmeas通过将取决于热检测器的温度变化率（DT）的校正项Vcomp加到所述输出信号来进行温度补偿。

    Infrared gas analyzer
    274.
    发明公开
    Infrared gas analyzer 失效
    Infrarot-Gasanalysator。

    公开(公告)号：EP0332180A2

    公开(公告)日：1989-09-13

    申请号：EP89104137.8

    申请日：1989-03-08

    Applicant: SANYO ELECTRIC CO., LTD.

    Inventor： Takeuchi, Kousuke ,  Shibata, Kenichi ,  Tanaka, Toshiharu ,  Nishikawa, Seiji ,  Kuroki, Kazuhiko ,  Nakano, Shoichi

    IPC: G01N21/35 ,  G01N21/00 ,  G01J5/00

    CPC classification number: G01N21/3504 ,  G01J5/34 ,  G01J2005/068 ,  G01N2201/0231

    Abstract: An infrared gas analyzer using a pyroelectric infrared sensor (1), which comprises a heating unit (11) for heating the in­frared sensor (1), a heating sensor for detecting its heating temperature and a temperature sensor (12) for detecting the am­bient temperature of the infrared sensor (1), and controls the heating unit (11) so as to retain the ambient temperature of the infrared sensor (1) at constant so that the output error is small irrespective of the change in ambient temperature.

    Abstract translation: 一种使用热电型红外线传感器（1）的红外线气体分析装置，其特征在于，包括用于加热红外线传感器（1）的加热单元（11），用于检测其加热温度的加热传感器和用于检测环境温度的温度传感器 ，并且控制加热单元（11）以使红外传感器（1）的环境温度保持恒定，使得输出误差小于环境温度的变化。

    Method and apparatus for reducing schlieren noise in a liquid chromatograph
    276.
    发明公开
    Method and apparatus for reducing schlieren noise in a liquid chromatograph 失效
    用于减少液相色谱仪中纹影噪声的方法和设备

    公开(公告)号：EP0164080A3

    公开(公告)日：1988-12-07

    申请号：EP85106717

    申请日：1985-05-31

    Applicant: ISCO, Inc.

    Inventor： Allington, Robert William

    IPC: G01N30/74 ,  G01N21/03

    CPC classification number: G01N21/251 ,  G01N21/15 ,  G01N30/74 ,  G01N2030/3038 ,  G01N2201/0231

    Abstract: A beam of light falling within the range of 180 to 3,000 nanometers is transmitted through a flow cell (12) in an optical compartment of an absorbance detector (16) after warm up of the equipment while the eluant flows through the flow cell (12) from a chromatographic column (20). The column extends upwardly from the absorbance detector (16) into an air chamber (60) having a volume of approximately 0.25 cubic foot formed with acrylic walls. Air flows from the absorbance detector (16) under the power of a fan at approximately 10 cubic feet per minute upwardly through an air duct having a cross section of approximately 1.5 square inches to the top where it connects with the air chamber (60), the speed of the motor being adjustable until temperature varies less than one degree Celsius between the flow cell (12) and the lower 10 centimeters of the column. Under these conditions Schlieren noise from the flow cell (12) due to flow-induced thermo-optical effects is reduced.

    Abstract translation: 落入180至3,000纳米范围内的光束在洗提液流过流动池（12）时在设备预热之后通过吸收检测器（16）的光学隔室中的流动池（12） 来自色谱柱（20）。 该柱从吸光度检测器（16）向上延伸到具有由丙烯酸壁形成的约0.25立方英尺体积的空气室（60）中。 空气以约10立方英尺每分钟的速度从风扇的功率下从吸光度检测器（16）向上流过具有大约1.5平方英寸横截面的空气管道到其与空气室（60）连接的顶部， 电动机的速度可调节，直到流动池（12）和塔下10厘米之间的温度变化小于1摄氏度。 在这些条件下，由流动诱导的热光效应引起的来自流动池（12）的Schlieren噪声降低。

    CONCENTRATION MEASURING DEVICE
    277.
    发明公开
    CONCENTRATION MEASURING DEVICE 审中-公开

    公开(公告)号：US20240085313A1

    公开(公告)日：2024-03-14

    申请号：US18210154

    申请日：2023-06-15

    Applicant: ATIK Co., Ltd.

    Inventor： Youngho HONG ,  Kyungwon PARK ,  Dongchul LEE ,  Yongjin LEE ,  Rakhyeun JO

    IPC: G01N21/31

    CPC classification number: G01N21/31 ,  G01N2201/0231 ,  G01N2201/0636

    Abstract: A concentration measuring device according to an embodiment may include a light-emitting unit configured to generate measurement light, a measurement unit configured to receive first measurement light that is part of the measurement light and that passes through a sample that is a measurement target, and a reference measurement unit configured to receive second measurement light that is part of the measurement light and that does not pass through the sample, wherein the concentration measuring device may be configured to measure a concentration of a chemical material in the sample by measuring an amount of light absorbed by the sample based on an amount of light detected by the measurement unit and an amount of light detected by the reference measurement unit.

    System and method of providing incoherent coupling of a laser into a high finesse optical cavity
    279.
    发明授权
    System and method of providing incoherent coupling of a laser into a high finesse optical cavity 有权

    公开(公告)号：US11892399B2

    公开(公告)日：2024-02-06

    申请号：US18101448

    申请日：2023-01-25

    Applicant: Nikira Labs Inc.

    Inventor： Manish Gupta ,  Rupal Gupta

    IPC: G01N21/31 ,  G02B5/10 ,  G02B27/30

    CPC classification number: G01N21/31 ,  G02B5/10 ,  G02B27/30 ,  G01N2201/0231 ,  G01N2201/0633 ,  G01N2201/0636 ,  G01N2201/06113

    Abstract: An optical system for performing an absorption measurement of a medium sample includes a laser source configured to output a laser beam having a wavelength corresponding to an absorption region of interest; a ringdown cavity comprising a chamber configured to receive the medium sample, an input mirror at an input end, an output mirror at an output end, and an optical axis that extends through the centers of the input mirror and the output mirror; a coupling device configured to couple the laser beam through the input mirror into the chamber; and a detector optically coupled with the cavity, and configured to detect an intensity of light of the wavelength corresponding to the absorption region of interest that extends through the output mirror, wherein a cavity geometry of the cavity increases the re-entrant condition of the cavity relative to a conventional cavity comprised of two spherical mirrors.

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