公开(公告)号：US5693945A

公开(公告)日：1997-12-02

申请号：US508816

申请日：1995-07-28

申请人： Shigeyuki Akiyama ,  Masahiko Fujiwara ,  Fujio Koga ,  Naohito Shimizu ,  Toshihiko Uno ,  Aritoshi Yoneda

发明人： Shigeyuki Akiyama ,  Masahiko Fujiwara ,  Fujio Koga ,  Naohito Shimizu ,  Toshihiko Uno ,  Aritoshi Yoneda

IPC分类号： G01N21/33 ,  G01N21/35 ,  G01N21/61

CPC分类号： G01N21/3504 ,  G01N21/33

摘要： An ultraviolet light source is provided on one end of a cell into which a sample gas is introduced. A beam splitter for dividing beams which have been transmitted through the cell into two optical paths is provided on the other end of the cell. A first detector is provided in one optical path, and a second detector is provided in the other optical path. A gas filter filled with a component to be measured is positioned between the detectors and beam splitter so that a concentration of the component to be measured may be obtained on the basis of a difference between the output of the first detector and the product of the output of the second detector and an appointed constant. Influences resulting from components coexisting in the sample gas are reduced. Alternatively, an infrared light source may be provided on one end of a sample cell. A gas filter filled with a gas the same as the gas to be measured is provided at the other end of the sample cell. A reference filter filled with a non-absorbing gas is positioned parallel to the gas filter. A beam splitter and a detector are sequentially disposed downstream from the gas filter, and a mirror is disposed downstream from the reference filter. The mirror is positioned such that beams which passed through the reference filter may be directed to the beam splitter and, subsequently, the detector.

摘要翻译： 在其中引入样品气体的单元的一端设置紫外光源。 用于将已经通过单元传输的光束分成两个光路的分束器设置在电池的另一端。 第一检测器设置在一个光路中，第二检测器设置在另一个光路中。 填充有要测量的部件的气体过滤器位于检测器和分束器之间，使得可以基于第一检测器的输出与输出的乘积之间的差异来获得要测量的部件的浓度 的第二个检测器和一个指定的常数。 减少了样品气体中共存的成分的影响。 或者，可以在样品池的一端上设置红外光源。 填充有与待测气体相同的气体的气体过滤器设置在样品池的另一端。 填充有非吸收气体的参考过滤器平行于气体过滤器定位。 分流器和检测器顺序地布置在气体过滤器的下游，并且反射镜设置在参考过滤器的下游。 反射镜被定位成使得通过参考滤光器的光束可以被引导到分束器，并且随后被引导到检测器。

公开(公告)号：US5773828A

公开(公告)日：1998-06-30

申请号：US606071

申请日：1996-02-23

申请人： Shigeyuki Akiyama ,  Masahiko Fujiwara ,  Takuji Oida ,  Naohito Shimizu ,  Aritoshi Yoneda ,  Toshikazu Ohnishi

发明人： Shigeyuki Akiyama ,  Masahiko Fujiwara ,  Takuji Oida ,  Naohito Shimizu ,  Aritoshi Yoneda ,  Toshikazu Ohnishi

IPC分类号： G01N21/35

CPC分类号： G01N21/3504

摘要： A gas analyzer has a simple composition and can measure multi-components at a high accuracy. A plurality of measuring cells, including a case where the cells are different in length from each other, communicate sequentially with each other through a communication part to form a single gas path. A cut-on filter as an infrared penetration/reflection means for diffracting spectrally an infrared wavelength is provided on a light source side. A NO.sub.X measuring cell 3 having a cell length of about 60 mm and a CO.sub.2 measuring cell 7 having a cell length of about 1 mm which communicate through the communication part with each other, and a capacitor microphone (an infrared-ray detector for NO.sub.X) and a pyroelectric detector (an infrared-ray detector for CO.sub.2) are provided on the infrared penetration and reflection sides of the optical filter.

摘要翻译： 气体分析仪具有简单的组成，可以高精度地测量多组分。 多个测量单元，包括单元彼此长度不同的情况，通过连通部相互连通，形成单一的气体通路。 在光源侧设置有作为用于在红外线波长上衍射的红外线穿透/反射装置的截止滤光器。 具有约60mm的单元长度的NO X测量单元3和通过连通部彼此连通的单元长度约1mm的CO 2测量单元7以及电容式麦克风（NOX的红外线检测器） 并且在光学滤波器的红外线透射和反射侧设置热电检测器（用于CO 2的红外线检测器）。

公开(公告)号：US5013920A

公开(公告)日：1991-05-07

申请号：US526242

申请日：1990-05-18

申请人： Ichiro Asano ,  Kennosuke Kojima ,  Aritoshi Yoneda

发明人： Ichiro Asano ,  Kennosuke Kojima ,  Aritoshi Yoneda

IPC分类号： G01N21/27 ,  G01N21/35 ,  G01N21/3504 ,  G01N21/3554

CPC分类号： G01N21/274 ,  G01N21/3504

摘要： An improved infrared analyzer is provided wherein an unknown specimen gas can be subjected to a measuring infrared ray and a comparative infrared ray to provide resulting signals. The system can be initially calibrated when a zero gas state is initially achieved in the sample cell, and correction factors are achieved by holding the zero gas instrument signal and an output difference between a zero gas comparison signal and the measuring signal for subsequent processing of the actual measurement of the specimen gas to provide a calibrated output signal representative of the concentration of the unknown gas.

公开(公告)号：US4673812A

公开(公告)日：1987-06-16

申请号：US740056

申请日：1985-05-30

申请人： Aritoshi Yoneda

发明人： Aritoshi Yoneda

IPC分类号： G01N21/27 ,  G01N21/31 ,  G01N21/35 ,  G01N21/3504 ,  G01D18/00 ,  G01N21/61

CPC分类号： G01N21/314 ,  G01N21/274 ,  G01N21/3504 ,  G01N2201/124

摘要： An amplifying circuit for amplifying an output from a measurement wavelength detector consists of a preamplifier and a measurement signal amplifier provided at an output of said preamplifier. The measurement signal amplifier is provided with an input-resistance and a feed-back resistance, a variable resistance connected in series to a normally open switch, the series combination being connected in parallel to the feed-back resistance so that the gain of the measurement signal amplifier may be variable.

摘要翻译： 用于放大来自测量波长检测器的输出的放大电路由前置放大器和设置在所述前置放大器输出端的测量信号放大器组成。 测量信号放大器具有输入电阻和反馈电阻，与常开开关串联的可变电阻，串联组合与反馈电阻并联连接，使得测量的增益 信号放大器可能是可变的。