JPS6433653U

JPS6433653U -

Info

Publication number: JPS6433653U
Application number: JP12602787U
Authority: JP
Priority date: 1987-08-19
Filing date: 1987-08-19
Publication date: 1989-03-02

Description

[Brief explanation of the drawing]

第１図はこの考案の赤外線ガス分析計の一実施
例の構成説明図、第２図は第１図の分析計に用い
られる回転セクタの一例の構成説明図、第３図は
回転セクタの他の例の構成説明図、第４図は検出
信号の波形についての積分処理を説明する説明図
、第５図は従来例の赤外線ガス分析計の問題点を
説明する説明図である。２……光源、３……試料ガスセル、４……回転
セクタ、５……検出器、６……濃度演算部、７…
…固定光路形成用素子、８……周期計時手段、４
１……赤外線光路分断用開口部、４２……小孔、
４３……切欠き、４４……モータ、６１……増幅
器、６２……サンプルアンドホールド、６３……
Ａ／Ｄコンバータ、６４……メモリ、６６……信
号補正部、６７……積分計、６８……濃度換算部
。 FIG. 1 is an explanatory diagram of the configuration of one embodiment of the infrared gas analyzer of this invention, FIG. 2 is an explanatory diagram of the configuration of an example of a rotating sector used in the analyzer of FIG. 1, and FIG. FIG. 4 is an explanatory diagram illustrating the integration process for the waveform of a detection signal, and FIG. 5 is an explanatory diagram illustrating problems with a conventional infrared gas analyzer. 2...Light source, 3...Sample gas cell, 4...Rotating sector, 5...Detector, 6...Concentration calculation unit, 7...
... Fixed optical path forming element, 8 ... Periodic clocking means, 4
1...Opening for infrared light path division, 42...Small hole,
43...Notch, 44...Motor, 61...Amplifier, 62...Sample and hold, 63...
A/D converter, 64...memory, 66...signal correction section, 67...integrator, 68...density conversion section.

Claims

[Claims for Utility Model Registration] A light source that can form an infrared optical path for measuring a sample gas, a rotating plate that has an opening that crosses the optical path and can intermittently block this optical path, a sample gas supply path, and a sample cell configured to be able to transmit infrared rays and having a sample gas exhaust path and set on the optical path;
An infrared gas detector configured at the latter stage of the optical path and capable of detecting the intermittent light transmitted through the sample cell, and a concentration calculation section capable of calculating the concentration in the sample gas based on the output signal from the detector. The analyzer includes a plurality of light transmitting parts set at regular intervals on a part or all of the arbitrary circumference of the rotating plate, and a light source and a light receiving part are set on a part of the rotating surface of the plurality of light transmitting parts. and a fixed optical path for control made up of a plurality of light transmitting parts intersect with each other, and based on the time interval at which the plurality of light transmitting parts intermittently interrupt the fixed optical path, from the time when the measuring optical path starts transmitting through the rotary plate opening. A control calculation unit is provided that can detect the presence or absence of rotational unevenness that occurs during the measurement time up to the end of transmission, and when rotational unevenness occurs, correct the integral value of the detection output curve for the above time to the integral value during normal rotation. An infrared gas analyzer characterized by: