JPS58135940A - Hydrocarbon gas concentration measuring apparatus - Google Patents
Hydrocarbon gas concentration measuring apparatusInfo
- Publication number
- JPS58135940A JPS58135940A JP57019292A JP1929282A JPS58135940A JP S58135940 A JPS58135940 A JP S58135940A JP 57019292 A JP57019292 A JP 57019292A JP 1929282 A JP1929282 A JP 1929282A JP S58135940 A JPS58135940 A JP S58135940A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- temperature
- hydrocarbon gas
- absorption coefficient
- laser light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 18
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 18
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 52
- 238000010521 absorption reaction Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 238000005259 measurement Methods 0.000 claims abstract description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000001294 propane Substances 0.000 description 2
- 241000218691 Cupressaceae Species 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- GGYFMLJDMAMTAB-UHFFFAOYSA-N selanylidenelead Chemical compound [Pb]=[Se] GGYFMLJDMAMTAB-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、炭化水素ガスｉｌ［ｆｊｌｌ定鋏置に装する
。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a fixed scissor for hydrocarbon gas.
赤外レーザ例えばＨｅ −Ｗｅガスレーザ６．５．３９
μ波長光を出力する。この波長は、炭化水素ガス例えば
メタンガス、プロパンガス等の吸収スペクトルに一致す
るためこれら炭化水素ガスによる３、５９μ党の吸収は
大きく、この吸収割合を検出すればこれらのガスの濃度
を測定することができる。いま赤外レーザ光を炭化水素
ガスに照射してこれによ抄吸収を受けて透過したレーザ
光の強度を工、ガスによる吸収を受けないレーザ光の強
ｆｔ工。、レーず光の光路長をｌ、ガスの吸収係数を−
とすα
ると、ガス濃度Ｐは次式で与えられる。Infrared laser e.g. He-We gas laser 6.5.39
Outputs μ wavelength light. This wavelength matches the absorption spectrum of hydrocarbon gases such as methane gas and propane gas, so the absorption of 3,59 μ by these hydrocarbon gases is large, and by detecting this absorption ratio, it is possible to measure the concentration of these gases. Can be done. Now, by irradiating an infrared laser beam onto a hydrocarbon gas, we can measure the intensity of the laser beam that is absorbed and transmitted by this, and we can measure the intensity of the laser beam that is not absorbed by the gas. , the optical path length of the laser beam is l, and the absorption coefficient of the gas is -
Then, the gas concentration P is given by the following equation.
Ｐ ＝」−ｈ（”−ａ
αｌ 工
吸収係数−は、ガスのＳ類、測定ガス雰囲気の温ｔＫよ
って決まる示教である０通常この吸収係数の温度による
変化は、１℃に対し０．２ないし０．４−１１ｆである
が、赤外レーザ光を用いたこの種ガス濃度測定装置の誤
差が測定濃ｆＫ対し１％程度と高精度であることを考え
れば、上紀温匿変化による吸収係数の誤差は無視できな
い＃１ど大きく、測定精度を低下させる原因になってい
る０第１図は、炭化水素ガスに属するブタン”４（Ａ）
％プロパｙｃ、１１１ｊＢ）及びイソブタｙ １ｓｏ−
０４Ｈ，ｏ（ＣＩの吸収係数に）−温ｔ＊性曲線を示し
、特にイソブタン（ｃ）は、温ｆＫよりその変動幅が異
なるためその補正が―しい。P = "-h("-a αl - is the principle determined by the S class gas and the temperature tK of the gas atmosphere to be measured. Normally, the change in absorption coefficient due to temperature is 0. 2 to 0.4-11f, but considering that the error of this type of gas concentration measurement device using infrared laser light is about 1% of the measured concentration fK, which is highly accurate, it is assumed that this is due to the Upper Age thermal changes. The error in the absorption coefficient is large, such as #1, which cannot be ignored, and causes a decrease in measurement accuracy.Figure 1 shows butane "4 (A), which belongs to a hydrocarbon gas.
% propyc, 111jB) and isobutyy 1so-
04H,o (absorption coefficient of CI) - temperature t* characteristic curve is shown, and isobutane (c) in particular has a different range of fluctuation than temperature fK, so its correction is difficult.
零発Ｗ１７４Ｆｉ被測定ガス雰囲気中に温度検出素子を
置き、測定時の１ｉｔｔ検出してこれに基いて吸収係数
を補正せんとするものである。以下第２図に基いて実ｍ
ｆＰｌｔ−説明する。（１）は、Ｈｅ−Ｎｅ カスＬ’
−ザ党源で、３．３９μの波長をもつ赤外レーザ光を
出射する。＋２１ ＋３１は、それぞれレーザ光が入射
される参照セル及び試料セルで、参照セル＋２１ Ｋ
ＩＩ！ 、レーザ光ｔ−吸収しないガスが、また試料セ
ル（３）Ｋは、炭化水素ガスに属するガスが注入されて
いる。（４）（５）は、各セル（２１＋３１がら出力さ
れたレーザ光を受光しその強度に応じた信号を出方する
光検出器で、セレン化鉛Ｐｂ５ｅ 、フォトダイオード
等よりなる。A temperature detection element is placed in the zero-emission W174Fi gas atmosphere to be measured, and 1it is detected during measurement, and the absorption coefficient is corrected based on this. Based on Figure 2 below, the actual m
fPlt-Explain. (1) is He-Ne waste L'
- The laser source emits infrared laser light with a wavelength of 3.39μ. +21 +31 are a reference cell and a sample cell into which laser light is incident, respectively, and the reference cell +21 K
II! , a gas that does not absorb laser light t- is injected into the sample cell (3) K, and a gas belonging to a hydrocarbon gas is injected into the sample cell (3) K. (4) and (5) are photodetectors that receive the laser light output from each cell (21+31) and output a signal according to its intensity, and are made of lead selenide Pb5e, a photodiode, etc.
（６）は、光検出器（４）がら出力された参照光信号工
。と光検出器（５）から出力された信号光信号工を入力
し、両信号の比を算出しかつこれを対数変換する対数比
較増幅器、（７）はＡＤｉ換器、（８）は乗算回路であ
る。（９）は被測定ガス雰囲気の温Ｉｆを検出するｍｆ
検出素子で熱電対、半導体温度センサ等が使用できる。(6) is a reference optical signal output from the photodetector (4). A logarithmic comparison amplifier inputs the optical signal output from the photodetector (5), calculates the ratio of both signals, and converts it logarithmically, (7) is an ADi converter, and (8) is a multiplication circuit. It is. (9) is mf that detects the temperature If of the gas atmosphere to be measured.
Thermocouples, semiconductor temperature sensors, etc. can be used as detection elements.
レーザ光源（１）、セル＋２１ ＋３１光検出器＋４１
＋５１及び温度検出素子（９）にて検出部αｅが構成
され、通常この検出部ＱＧｔｉ恒温檜とされる。レーザ
光を用い几ガス濃度測定装置を標準器として、市販のガ
スセンサの品質検査を行なう場合、このガスセンサを恒
温槽内に置き、プロパンガス都市ガス等を所定量注入し
てその作動開始濃ｆ？：検出するとともに、槽内温度を
、約−１０℃から５０℃程度まで変化させ工温度変化に
対する信頼性が検査される。ａ５は増幅器、１１２はＡ
Ｄ変換器、Ｑ３はガスの種駒を選択する選択スイッチで
、被測定ガスの種駒に応じて手動でセットされる。側は
ＡＤ変換器■及び選択スイッチ酩からの２種の信号を入
力するアドレスデコーダ、１１５１は炭化水素ガスに属
する各種ガスの吸収係数が温度ごとに補正されて記憶さ
れている続出し専用メモリであり、選択スイッチ側にて
被測定ガスの指定が行なわれ、一方温駅検出案子（９）
にて温度の指定が行なわれてアドレスデコーダａΦを介
して所望の吸収係数情輸が次段の乗算回路（８）へ入力
される。この乗算回路（８）は、前述した対数比較信号
／ ｎ ｂ ５吸収係数情報信号ことを乗算するもので
、その演算結果は、被測定ガスの濃度として表示装置（
至）に表示される。Laser light source (1), cell +21 +31 photodetector +41
+51 and the temperature detection element (9) constitute a detection section αe, and this detection section QGti is normally made of a constant temperature cypress. When inspecting the quality of a commercially available gas sensor using a laser light-based gas concentration measuring device as a standard, place the gas sensor in a thermostatic chamber, inject a predetermined amount of propane, city gas, etc., and start its operation. : At the same time as detection, the temperature inside the tank is varied from about -10°C to about 50°C to test reliability against temperature changes. a5 is an amplifier, 112 is A
The D converter Q3 is a selection switch for selecting a gas seed, and is manually set according to the gas seed to be measured. On the side is an address decoder that inputs two types of signals from the AD converter and the selection switch, and 1151 is a continuous read-only memory in which the absorption coefficients of various gases belonging to hydrocarbon gas are corrected and stored for each temperature. Yes, the gas to be measured is specified on the selection switch side, while the temperature station detection screen (9)
The temperature is designated at , and desired absorption coefficient information is input to the next stage multiplication circuit (8) via the address decoder aΦ. This multiplication circuit (8) multiplies the aforementioned logarithmic comparison signal/nb5 absorption coefficient information signal, and the calculation result is displayed as the concentration of the gas to be measured on the display device (
(to).
以上のように木発明装Ｗは、炭化水素ガスの吸収係数が
温度によって変動し、かつその変動幅も温ｆによって異
なる場合があることを考慮し、温する吸収係数を特定す
るものであるから、測定値に対する温度による誤差を解
消することができ、この種測定装置の高い測定槽ｆを維
持することができる。As mentioned above, Mokuinso W specifies the absorption coefficient for heating, taking into account that the absorption coefficient of hydrocarbon gas varies depending on the temperature, and that the range of variation may also vary depending on the temperature f. , it is possible to eliminate errors in measured values due to temperature, and it is possible to maintain a high measurement tank f of this type of measuring device.
第１図は、炭化水素ガスの吸収係数一温度特性曲線図、
第２図は、本発明実總例ブロック図である０
（１）・・・レーザ光源、（２）・・・参照セル、（３
）・・・試料セル、（４１＋５１・・・光検出器、（６
）・・・対数比較増幅器、（７１（１２・・・ＡＤ変換
器、（８）・・・乗算回路、（９）・・・温度検出素子
、αＧ・・・検出部、ａト・・増幅器、ａト・選択スイ
ッチ、ａ（・・・アドレスデコーダ、ａト・メモリ、α
ト・表示装置。Figure 1 is an absorption coefficient-temperature characteristic curve diagram of hydrocarbon gas,
FIG. 2 is a block diagram of an actual example of the present invention. (1) Laser light source, (2) Reference cell, (3
)...Sample cell, (41+51...Photodetector, (6
)...logarithmic comparison amplifier, (71(12...AD converter, (8)...multiplier circuit, (9)...temperature detection element, αG...detection section, a...amplifier , a to selection switch, a (...address decoder, a to memory, α
display device.
Claims (1)
足して炭化水素ガスの濃りｔ測定する炭化水素ガス濃度
測定装置において、１紀被測定ガス雰囲気の温１ｔ−検
出する■駅検出素子、炭化水素ガスに属するガスの種＠
を選択する選択スイッチ、上記炭化水素ガスに属するガ
スの異なる温度に対応した吸収係数情報が配憶されｔメ
モリ、上記選択スイッチからのガス選択信号及び温度検
出信号からの温度検出信号に基いて上記メモリの対応領
域を指定するアドレスデコーダ、該アドレスデコーダに
て指定された上記メモリの対応領域から読み出された吸
収係数情報をガス製置測定信号に乗する乗算回路、誼乗
算−路の出力を表示する表示装置とを備えてなる炭化水
素ガス濃度測定装置０1. Infrared *** is irradiated onto hydrocarbon gas, and its transmitted light intensity ttS
In a hydrocarbon gas concentration measuring device that measures the concentration of hydrocarbon gas by adding the temperature 1 t of the primary gas atmosphere to be measured, the station detection element detects the species of gas belonging to hydrocarbon gas @
A selection switch for selecting the above-mentioned gases, which stores absorption coefficient information corresponding to different temperatures of the gases belonging to the hydrocarbon gas, and a memory for selecting the above-mentioned gases based on the gas selection signal from the selection switch and the temperature detection signal from the temperature detection signal. an address decoder that specifies a corresponding area of the memory; a multiplication circuit that multiplies the absorption coefficient information read from the corresponding area of the memory specified by the address decoder to the gas measurement signal; and an output of the multiplication circuit. Hydrocarbon gas concentration measuring device 0 comprising a display device for displaying
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57019292A JPS58135940A (en) | 1982-02-08 | 1982-02-08 | Hydrocarbon gas concentration measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57019292A JPS58135940A (en) | 1982-02-08 | 1982-02-08 | Hydrocarbon gas concentration measuring apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58135940A true JPS58135940A (en) | 1983-08-12 |
Family
ID=11995353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57019292A Pending JPS58135940A (en) | 1982-02-08 | 1982-02-08 | Hydrocarbon gas concentration measuring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58135940A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2687785A1 (en) * | 1992-01-30 | 1993-08-27 | Vaisala Oy | CALIBRATION PROCESS FOR GAS CONCENTRATION MEASUREMENTS. |
| US5672874A (en) * | 1994-03-30 | 1997-09-30 | Horiba, Ltd. | Infrared oil-concentration meter |
| EP0921390A1 (en) * | 1997-12-05 | 1999-06-09 | Oldham France S.A. | Method for determining the concentration of a gas in a gas mixture and analysis apparatus for implementing such method |
| US7325971B2 (en) * | 2005-05-25 | 2008-02-05 | Fons Lloyd C | Method and apparatus for locating hydrocarbon deposits |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5188289A (en) * | 1974-12-19 | 1976-08-02 |
-
1982
- 1982-02-08 JP JP57019292A patent/JPS58135940A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5188289A (en) * | 1974-12-19 | 1976-08-02 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2687785A1 (en) * | 1992-01-30 | 1993-08-27 | Vaisala Oy | CALIBRATION PROCESS FOR GAS CONCENTRATION MEASUREMENTS. |
| US5672874A (en) * | 1994-03-30 | 1997-09-30 | Horiba, Ltd. | Infrared oil-concentration meter |
| EP0921390A1 (en) * | 1997-12-05 | 1999-06-09 | Oldham France S.A. | Method for determining the concentration of a gas in a gas mixture and analysis apparatus for implementing such method |
| FR2772127A1 (en) * | 1997-12-05 | 1999-06-11 | Oldham France Sa | METHOD FOR DETERMINING THE CONCENTRATION OF A GAS IN A GASEOUS MIXTURE AND ANALYSIS DEVICE FOR IMPLEMENTING SUCH A METHOD |
| US6218666B1 (en) | 1997-12-05 | 2001-04-17 | Oldham France S.A. | Method of determining the concentration of a gas in a gas mixture and analyzer for implementing such a method |
| US7325971B2 (en) * | 2005-05-25 | 2008-02-05 | Fons Lloyd C | Method and apparatus for locating hydrocarbon deposits |
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