公开(公告)号：US4883963A

公开(公告)日：1989-11-28

申请号：US856289

申请日：1986-04-28

Applicant: Gabor J. Kemeny ,  David L. Wetzel

Inventor： Gabor J. Kemeny ,  David L. Wetzel

IPC: G01N21/27 ,  B21B37/30 ,  G01J1/44 ,  G01J3/12 ,  G01J4/00 ,  G01N21/35 ,  G01N21/47

CPC classification number: G01N21/85 ,  G01J3/1256 ,  G01N21/4738 ,  G01J2001/4242 ,  G01J4/00 ,  G01N2021/1742 ,  G01N2021/4742 ,  G01N21/3563 ,  G01N21/4785 ,  G01N2201/065 ,  Y10S359/90

Abstract: The optical reflectance or transmittance concentration analyzer includes an acousto-optical tunable filter (AOTF). The AOTF is tuned by a computer controlled digital-to-analog converter through a tunable sweep oscillator. Tuned beams can be selected according to their direction of propagation or according to their polarization behavior. Therefore, if desired, a pair of crossed polarizers can be used to select one of the tuned monochomatic light beams that pass from a light source through the AOTF. To obtain rapid wavelength change along with electronic chopping or wavelength modulation, the digital-to-analog converter output is combined with the output of a high speed signal generator. The modulated light is conducted directly or through a fiber optic cable to the location of the optical measurement and impinges upon the sample where it is reflected or transmitted. The emerging light is collected onto detector(s). The measurement time interval can be distributed among the required wavelengths or wavelength pairs according to an unequal scheme to decrease the error of the result in a calibration equation. The apparatus is particularly adaptable for use as an on-line concentration monitor in industrial process control because of its stability, efficiency and ability to perform quick analyses.

公开(公告)号：US4817413A

公开(公告)日：1989-04-04

申请号：US838564

申请日：1986-03-11

Applicant: Ichiro Asano ,  Toshihiko Uno

Inventor： Ichiro Asano ,  Toshihiko Uno

IPC: G01J1/16 ,  G01J1/44 ,  G01N21/00 ,  G01N21/17 ,  G01N29/00 ,  G01N21/85

CPC classification number: G01N29/2425 ,  G01N21/1702 ,  G01N29/00 ,  G01J1/1626 ,  G01J2001/4242 ,  G01N2021/1704 ,  G01N2021/1708 ,  G01N2291/02809 ,  G01N2291/0427

Abstract: A method of using an opto-acoustic apparatus for measuring, in an environment containing extraneous noise, the concentration of a gas in a mixture of gases or of particulates in a gas. The method is constituted by the steps of providing a measuring opto-acoustic cell having gas inlet and gas outlet for receiving and discharging a gas containing a particulate or a mixture of gases containing a gas the concentration of which is to be measured, directing laser rays from a laser ray generating device into the opto-acoustic cell, placing a chopper in the path of the laser rays between the device and the cell and operating the chopper for chopping the laser rays at a frequency corresponding to the resonant frequency of the cell, providing a narrow band microphone having a resonator with a narrow resonance frequency range including the resonant frequency of the cell and sufficiently narrow to exclude unwanted noise signals from the environment in which the cell is located, placing the microphone on the cell for detecting the sound signal generated by changes in the internal pressure of the cell, and determining from the sound signal the concentration of the gas in the mixture of gases or the concentration of the particulates in the gas.

Abstract translation: 一种使用光声装置的方法，用于在包含杂质噪声的环境中测量气体或气体中的微粒混合物中的气体浓度。 该方法由以下步骤构成：提供具有气体入口和气体出口的测量光声单元，用于接收和排出含有气体的气体，所述气体或气体混合物含有待测量浓度的气体， 从激光射线产生装置到光声单元中，将切割器放置在装置和单元之间的激光路径中，并以与单元的共振频率相对应的频率操作切割器以切割激光， 提供具有谐振器的窄带麦克风，该谐振器具有包括该单元的谐振频率的窄谐振频率范围，并且足够窄以排除来自该单元所在环境的不需要的噪声信号，将麦克风放置在用于检测该声音信号的单元 由电池的内部压力的变化产生的，并且根据声音信号确定混合物中气体的浓度 气体的浓度或气体中的微粒浓度。

公开(公告)号：US4577966A

公开(公告)日：1986-03-25

申请号：US578758

申请日：1984-02-09

Applicant: Yoshiro Fukasawa

Inventor： Yoshiro Fukasawa

IPC: G01J1/44 ,  G01J3/08 ,  G01J3/42

CPC classification number: G01J3/08 ,  G01J3/42 ,  G01J2001/4242 ,  G01N2201/12792

Abstract: A double-beam spectrophotometer for spectral analysis of a sample in the infrared region is provided in which to eliminate errors in measurement of the absorbance of the sample caused by undesired thermal radiation from the sample itself, first and second sectors are used for division and recombination of beam paths and coordinated such that a detector which receives a beam along the combined beam path produces output signals consisting of components having a frequency f associated with the cycle of operation of the sectors and components having a frequency 2f, those components having frequencies f and 2f are independently derived out of the detector output signals, and the ratio of the components is computed, thereby obtaining the ratio of intensity of sample beam to reference beam independent of the undesired thermal radiation.

Abstract translation: 提供了用于红外区域中的样品的光谱分析的双光束分光光度计，其中消除了由来自样品本身的不期望的热辐射引起的样品的吸光度的测量误差，第一和第二扇区用于分离和重组 并且被协调使得沿着组合光束路径接收光束的检测器产生由具有频率f的分量组成的输出信号，所述分量具有频率f，该频率f与扇区和具有频率2f的分量的操作周期相关联，那些分量具有频率f和 2f被独立地从检测器输出信号中导出，并且计算分量的比率，由此获得独立于不期望的热辐射的采样光束与参考光束的强度之比。

公开(公告)号：US4448529A

公开(公告)日：1984-05-15

申请号：US253357

申请日：1981-04-13

Applicant: Gerhard Krause

Inventor： Gerhard Krause

IPC: G01J1/42 ,  G01J3/28

CPC classification number: G01J3/2846 ,  G01J2001/4242 ,  G01J3/0229

Abstract: Spectral analysis of a beam of radiation is carried out by splitting the beam of radiation into its respective spectral components and by applying a characteristic modulation to each of the spectral components before allowing them to fall on a common detector. The super-imposed signals generated by the detector and representative of the spectral components are then electronically segregated by reference to the characteristic modulations that have been applied to the individual spectral components. This is conveniently done by generating a series of modulated reference signals which have been modulated in exactly the same way as the spectral components of interest. The technique is not restricted to optical spectra but can also be used, for example, for X-ray spectra and mass spectra.

Abstract translation: 辐射光束的光谱分析是通过将辐射束分解成其相应的光谱分量并且通过在允许它们落在公共检测器上之前对每个光谱分量施加特征调制来进行的。 然后，通过参考已应用于各个光谱分量的特征调制，通过检测器产生并代表光谱分量的超强加的信号被电子分离。 这通过产生已经以与感兴趣的光谱分量完全相同的方式调制的一系列调制参考信号来方便地完成。 该技术不限于光谱，而是可以用于例如X射线光谱和质谱。

公开(公告)号：US4313344A

公开(公告)日：1982-02-02

申请号：US98844

申请日：1979-11-30

Applicant: Torgny Brogardh ,  Lars Sander

Inventor： Torgny Brogardh ,  Lars Sander

IPC: G01J5/04 ,  G01K1/02 ,  G01J5/28

CPC classification number: G01J5/08 ,  G01J5/0044 ,  G01J5/0821 ,  G01J5/0834 ,  G01J5/0862 ,  G01J5/0887 ,  G01J5/0896 ,  G01K1/024 ,  G01J2001/4242

Abstract: The invention relates to a fiber optical temperature measuring device of the pyrometer type, comprising a transducer section and an electronic section, which are mutually interconnected by at least one optical fiber. The electronic section includes at least one light source and the light therefrom is arranged to be emitted via the optical fiber to the transducer, and in the transducer at least part of the light is reflected back into the fiber and is conducted through the optical fiber together with an output measuring signal from the transducer to one or more detectors included in the electronic section.

Abstract translation: 本发明涉及高温计类型的光纤光学温度测量装置，其包括通过至少一根光纤相互互连的换能器部分和电子部分。 电子部分包括至少一个光源，并且其中的光被布置成经由光纤发射到换能器，并且在换能器中，至少一部分光被反射回到光纤中并且一起通过光纤传导 具有从换能器到包括在电子部件中的一个或多个检测器的输出测量信号。

公开(公告)号：US3794425A

公开(公告)日：1974-02-26

申请号：US3794425D

申请日：1972-08-22

Applicant: SHELL OIL CO

Inventor： SMITH V ,  BOWERS R

IPC: G01J1/44 ,  G01J3/06 ,  G01J3/12 ,  G01J3/28 ,  G01J5/34 ,  G01N21/31 ,  G01N21/35 ,  G01N21/34 ,  G01J3/48

CPC classification number: G01J3/12 ,  G01J5/34 ,  G01J2001/4242 ,  G01J2003/1234 ,  G01J2003/284 ,  G01N21/31 ,  G01N21/314 ,  G01N21/3504

Abstract: A fast spectroscopic analyzer wherein chopped infrared light is passed through a sample cell, a rotating variable filter and to a detector. The angular position of the filter corresponds to various wave lengths of light and is used to synchronize a recording system, recording signals of interest.

Abstract translation: 一种快速光谱分析仪，其中切碎的红外光通过样品池，旋转可变过滤器和检测器。 滤光器的角度位置对应于各种波长的光，并用于同步记录系统，记录感兴趣的信号。

公开(公告)号：US3398285A

公开(公告)日：1968-08-20

申请号：US14529961

申请日：1961-10-16

Applicant: PERKIN ELMER CORP

Inventor： SACHS HAROLD L

IPC: G01J1/42 ,  G01J3/00 ,  G01J3/08 ,  G01J3/28 ,  G01J3/32 ,  G01J3/42 ,  G01J5/52

CPC classification number: G01J5/522 ,  G01J1/1626 ,  G01J1/4228 ,  G01J3/08 ,  G01J3/28 ,  G01J3/32 ,  G01J3/42 ,  G01J5/52 ,  G01J2001/4242 ,  G01J2003/2866

公开(公告)号：US3314327A

公开(公告)日：1967-04-18

申请号：US15901661

申请日：1961-12-13

Applicant: HONEYWELL INC

Inventor： KILLPATRICK JOSEPH E ,  SPERLING HERMAN G

IPC: G01J1/42 ,  G01J3/46 ,  G01J3/50

CPC classification number: G01J3/50 ,  G01J3/0232 ,  G01J3/465 ,  G01J3/502 ,  G01J2001/4242 ,  G01J2003/467

公开(公告)号：US3086422A

公开(公告)日：1963-04-23

申请号：US53840855

申请日：1955-10-04

Applicant: SUNSTEIN DAVID E

Inventor： SUNSTEIN DAVID E

IPC: G01J1/42 ,  G01J3/50

CPC classification number: G01J3/50 ,  G01J2001/4242

公开(公告)号：US20240210242A1

公开(公告)日：2024-06-27

申请号：US18557594

申请日：2022-08-31

Applicant: SHANGHAI LANBAO SENSING TECHNOLOGY CO., LTD.

Inventor： Yongtong XU ,  Yong XIE ,  Dugui ZHAO ,  Hongguang WEI ,  Xingxing JIANG ,  Chengsong ZHOU

IPC: G01J1/44 ,  G01J1/42

CPC classification number: G01J1/44 ,  G01J1/4204 ,  G01J2001/4242 ,  G01J2001/444

Abstract: The disclosure provides a photoelectric sensor capable of resisting high-frequency light interference. It comprises a transmitting tube, double receiving tubes, a filter arranged at the front ends of the double receiving tubes for filtering optical signals, a band-pass filter circuit coupled to the double receiving tubes, a differential amplifier coupled to the band-pass filter circuit, a control module for controlling the synchronous receiving of optical signals, and a sensor hysteresis error setting system for improving the anti-interference performance of sensors; the control module further collects and obtains ambient light interference signals and sets an interference signal threshold value, and when it is detected that the amplitude of the collected ambient light interference signals is larger than the set interference signal threshold value, the control module discards the light signals lower than the interference signal threshold value after the interference signals are overlaid.