JPH0485153U

JPH0485153U -

Info

Publication number: JPH0485153U
Application number: JP12743290U
Authority: JP
Priority date: 1990-11-29
Filing date: 1990-11-29
Publication date: 1992-07-23

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例としてのガス分析
計の構成を概略的に示す縦断面説明図である。ま
た、第２図ａは、第１図に示されている構造とさ
れたガス分析計を用いてＣＯ濃度を実測した際の
測定データを示すグラフであり、更に第２図ｂは
、チヨツパを備えた従来構造のガス分析計を用い
て同一条件下にＣＯ濃度を実測した際の測定デー
タを示すグラフである。１０……ガス分析計、１２……ハウジング、１
４……共同光路、１６……第一の分割ハウジング
、１８……分岐光路、２０……第二の分割ハウジ
ング、２２……第一の光路、２４……第二の光路
、２６……第三の分割ハウジング、２８……透過
窓、３２……赤外線源、３６……第一のサーモパ
イル、３８……第二のサーモパイル、４４……被
測定ガス、４６……（赤外線を殆ど吸収しない）
ガス、４８……基準ガス、５０……光学フイルタ
。 FIG. 1 is an explanatory longitudinal cross-sectional view schematically showing the configuration of a gas analyzer as an embodiment of the present invention. Furthermore, Fig. 2a is a graph showing measurement data when CO concentration was actually measured using the gas analyzer having the structure shown in Fig. It is a graph showing measurement data when CO concentration was actually measured under the same conditions using a gas analyzer with a conventional structure. 10...Gas analyzer, 12...Housing, 1
4... Common optical path, 16... First divided housing, 18... Branched optical path, 20... Second divided housing, 22... First optical path, 24... Second optical path, 26... Third Three divided housing, 28...Transmission window, 32...Infrared source, 36...First thermopile, 38...Second thermopile, 44...Measurement gas, 46...(Hardly absorbs infrared rays)
Gas, 48... Reference gas, 50... Optical filter.

Claims

[Claims for Utility Model Registration] (1) An infrared source capable of continuously emitting infrared rays; a measurement cell into which a gas to be measured is introduced, through which the infrared rays emitted from the infrared source pass; An optical splitter that splits the infrared rays that passed through the measurement cell into two optical paths, and a gas that hardly absorbs infrared rays is sealed inside, allowing the infrared rays guided through one of the optical paths split by the optical splitter to pass through. a measurement optical path; a reference optical path sealed inside a reference gas substantially composed of a gas component to be measured, through which infrared rays guided through the other optical path branched by the optical splitter are passed; and the measurement optical path. a first thermopile that is irradiated with infrared rays guided through the reference optical path and outputs a voltage according to the intensity of the irradiated infrared rays; and a second thermopile that outputs a voltage according to the intensity of the thermopile, and by comparing the output of the first thermopile and the output of the second thermopile,
An infrared gas analyzer that obtains measurement output according to the components of the gas being measured. (2) An optical filter that transmits only infrared rays in a predetermined wavelength range necessary for measurement is arranged on an optical path between the infrared ray source and the optical distributor, through which infrared rays emitted from the infrared ray source pass. The infrared gas analyzer according to claim (1).