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    31.
    发明专利
    失效

    公开(公告)号：JPS4950975A

    公开(公告)日：1974-05-17

    申请号：JP5453373

    申请日：1973-05-16

    IPC: G01J1/42 ,  G01J1/36 ,  H01F7/06

    32.
    发明专利
    失效

    公开(公告)号：JP2609616B2

    公开(公告)日：1997-05-14

    申请号：JP19965987

    申请日：1987-08-10

    IPC: G01N21/59 ,  G01B11/06 ,  G01J1/04 ,  G01J1/10 ,  G01J1/16 ,  G01J1/36 ,  G01J1/44 ,  G01J3/42 ,  G01N21/01 ,  G01N21/25 ,  G01N21/27 ,  G01N21/84

    Abstract: A photometer in which a measuring phase, a reference phase and a dark phase are produced by means of a chopper. These phases are staggered in time, so that a single detector can be provided for all phases. In the photometer the object to be measured is situated between two light conductors, the one light conductor leading to the detector and the other light conductor leading to the chopper input. The chopper output is carried by an additional light conductor to the detector.

    LIGHT TRANSMITTER FOR FLUID
    34.
    发明专利
    LIGHT TRANSMITTER FOR FLUID 失效

    公开(公告)号：JPH05209829A

    公开(公告)日：1993-08-20

    申请号：JP29395992

    申请日：1992-10-08

    Applicant: PERKIN ELMER CORP

    Inventor： ROBAATO EE HOURUTO

    IPC: G01N21/59 ,  G01J1/36 ,  G01N21/03 ,  G01N21/25

    Abstract: PURPOSE: To obtain a double device with improved accuracy and stability which is provided with double light paths for fluid and reference medium as well as almost the same and self-compensation optical raws for sample fluid and reference medium, concerning new light transmitting device for radiation in the fluid. CONSTITUTION: A light transmitting device 10 is provided with a pair of reference channels 14 and 16 consisting of glass bars and a pair of sample channels 12 and 18 housing a sample fluid. A beam splitter 46 and a mirror 56 allow a first part of incident beam of radiation passing through a reference approach channel 14 and a second part of incident beam passing through a sample approach channel 12 to pass through therein. The first part is reflected through a reference outgoing channel 16 and the second part is reflected through a sample outgoing channel 18. The beam splitter 46 and mirror 56 allow the outgoing beam to direct to a common outlet path 73.

    Measuring device for concentration and partial pressure of gas
    38.
    发明专利
    Measuring device for concentration and partial pressure of gas 失效
    用于气体浓度和部分压力的测量装置

    公开(公告)号：JPS6148734A

    公开(公告)日：1986-03-10

    申请号：JP16999484

    申请日：1984-08-16

    Applicant: Nippon Steel Corp

    Inventor： INOUCHI TORU ,  HOSHINO TAIZO

    IPC: G01J3/42 ,  G01J1/36 ,  G01N21/27

    CPC classification number: G01J1/36

    Abstract: PURPOSE:To remove a back light noise and to take accurate measurement by rotary sectors which rotate in synchronization with each other on the optical axis of laser light emitted toward gas to be measured and a reflecting mirror between both sectors, and further providing a reflecting plate behind the gas to be measured on the optical axis. CONSTITUTION:The rotary sectors 5A and 5B are rotated by a motor 6 in synchronization with each other; a transmission hole 15 and a total absorbing plate 16 are arranged on the sector 5A at the side of the laser element 1 in combination and a transmission hole 15, a total absorbing surface 16, and a total reflecting surface 17 are arranged on the sector 5B at the side of the gas 12 to be measured. The half-mirror 7 is provided between the sectors 5A and 5B and a detector 9 is provided at the focus position of an off-axis parabolic mirror 8 opposed to the mirror 7. Those are stored in a main body 10 and measurement light and reference light pass through a window 11 formed in the main body 10. The reflecting surface 13 of a retroreflector, etc., is provided behid the gas 12 to be measured. Thus, the influence of a back light noise is removed and the concn. and partial pressure of many kinds of gas are measured accurately.

    Abstract translation: 目的：为了消除背光噪音，并通过旋转扇区进行准确的测量，旋转扇区在被测量气体发射的激光的光轴上相互同步旋转，并在两扇区之间设置反射镜，并进一步提供反射板 在光轴上测量的气体后面。 构成：旋转扇区5A和5B由电动机6彼此同步地旋转; 传感孔15和总吸收板16组合在激光元件1侧的扇形部分5A上，并且在扇形部5B上布置有透光孔15，总吸收表面16和总反射表面17 在要测量的气体12的侧面。 半镜7设置在扇区5A和5B之间，并且检测器9设置在与反射镜7相对的离轴抛物面反射镜8的焦点位置。这些被存储在主体10中，测量光和参考 光通过形成在主体10中的窗口11.后向反射器等的反射表面13设置为待测量的气体12。 因此，背光噪声的影响被消除， 并准确测量多种气体的分压。

    Measurement of nox concentration
    39.
    发明专利
    Measurement of nox concentration 失效
    NOX浓度的测量

    公开(公告)号：JPS5957143A

    公开(公告)日：1984-04-02

    申请号：JP16807082

    申请日：1982-09-27

    Applicant: Agency Of Ind Science & Technol

    Inventor： ONDA KAZUO ,  TAKANO KIYONAMI

    IPC: G01N21/39 ,  G01J1/36 ,  G01N21/27

    CPC classification number: G01J1/36

    Abstract: PURPOSE:To measure an NOX concn. simply, rapidly and certainly without performing sampling, by using data light and reference light wohse phase are mutually shifted in specific angles. CONSTITUTION:CO laser beam is passed through a beam splitter 6 to be splitted into two parts which are, in turn, converted to data light and reference light which are mutually different 180 deg. in the phases thereof by a chopper 8. In this case, the data light is permeated through the gas to be measured in the flowline 3 for flowing said gas and met with the same light path as the reference light by a beam splitter 11 to be received as one optical beam by a beam detector 14. The amplitude value component A1 due to the frequency component of the data light from the converting electric signal of the detector 14 and the amplitude value component A2 due to the frequency component of one optical beam are applied through lock-in amplifiers 15a, 15b and the ratio A1/A2 corresponding to an NOX concn. is determined by an operator 16. By this constitution, it is unnecessary to perform the sampling of a sample gas and the NOX concn. is measured simply, rapidly and certainly.

    Abstract translation: 目的：测量NOX浓度 通过使用数据光和参考光，简单，快速和肯定地不进行采样，相位在特定角度相互偏移。 构成：CO激光束通过分束器6，以分成两部分，这两部分又转换成数据光和相互不同的180度的参考光。 在这种情况下，数据光在用于使所述气体流动的流动管线3中渗透通过待测量的气体，并且通过分束器11与与参考光相同的光路被满足为 由波束检测器14作为一个光束接收。由于检测器14的转换电信号的数据光的频率分量和由于一个光束的频率分量引起的振幅值分量A2，振幅值分量A1是 通过锁定放大器15a，15b施加，并且对应于NOX浓度的比率A1 / A2。 由操作者16确定。通过这种结构，不需要对样品气体和NO x浓度进行取样。 测量简单，快速和肯定。

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