JPWO2016047169A1 - ガス測定装置 - Google Patents
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000001514 detection method Methods 0.000 claims abstract description 67
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 61
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 60
- 238000003745 diagnosis Methods 0.000 claims abstract description 28
- 239000004065 semiconductor Substances 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 57
- 238000005259 measurement Methods 0.000 description 57
- 238000010521 absorption reaction Methods 0.000 description 45
- 230000004888 barrier function Effects 0.000 description 11
- 230000003287 optical effect Effects 0.000 description 11
- 230000008859 change Effects 0.000 description 10
- 238000005253 cladding Methods 0.000 description 10
- 230000031700 light absorption Effects 0.000 description 8
- 230000007704 transition Effects 0.000 description 8
- 238000000862 absorption spectrum Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 241000282412 Homo Species 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 239000000969 carrier Substances 0.000 description 3
- 230000030136 gastric emptying Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000661 Mercury cadmium telluride Inorganic materials 0.000 description 2
- 230000035622 drinking Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012887 quadratic function Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 108091006149 Electron carriers Proteins 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006806 disease prevention Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000005428 wave function Effects 0.000 description 1
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Abstract
Description
なお、図面は模式的または概念的なものであり、各部分の厚みと幅との関係、部分間の大きさの比率などは、必ずしも現実のものと同一とは限らない。また、同じ部分を表す場合であっても、図面により互いの寸法や比率が異なって表される場合もある。
なお、本願明細書と各図において、既出の図に関して前述したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。
図1は、第1の実施形態に係る呼気診断装置を例示する模式図である。
図1に表したように、本実施形態に係る呼気診断装置110は、セル部20と、光源部30と、検出部40と、制御部45と、を含む。
実施形態において、高精度の呼気診断が可能である。
これにより、さらに高精度の呼気診断が可能となる。
図2(a)は、光源部30から出射する測定光30Lを制御する電流Isの変化の例を示している。電流Isは、発光部30aに供給される電流でも良い。図2(b)は、光源部30から出射する測定光30Lの波長の変化の例を示している。図2(c)は、検出部40において検出される信号の変化の例を示している。これらの図において、横軸は時間tである。図2(a)の縦軸は、電流Isである。図2(b)の縦軸は、波長λである。図2(c)の縦軸は、信号の強度Sgである。
図3(a)は、12CO2の吸収スペクトルを表し、図3(b)は、13CO2の吸収スペクトルを表す。これらの図において、光路長は同じである。図4(a)は、12CO2及び13CO2の吸収スペクトルを、波長を拡大して示している。図4(b)は、波数を拡大して示している。図3(a)、図3(b)及び図4(a)の横軸は、波長λ(μm)である。図4(b)の横軸は、波数κ(cm−1)である。縦軸は、吸収率Ab(%)である。
波長帯WLの範囲(波数帯の範囲)は、例えば、約1cm−1である。
これらの図は、2CO2及び13CO2の吸収スペクトルを表している。
波長帯WLは、二酸化炭素の吸収スペクトルに応じて適切に定められる。波長帯WLは、13CO2の吸収ピークの強度が12CO2の非ピークの強度よりも高いことが好ましい。
図6に表したように、呼気診断装置110において、筐体10wが設けられる。筐体10w内に、セル部20と、光源部30と、検出部40と、制御部45と、が設けられる。制御部45は、筐体10wの外に設けられても良い。
図7に示すように、測定を開始する。
まず、電磁弁を操作する(ステップS1)。具体的には、第2電磁弁V2及び第3電磁弁V3を開状態にし、第1電磁弁V1を閉状態にする。
参照データを測定する(ステップS3)。
流量計出力値が設定値(例えば予め定められた値)を超えるかどうかを判断する(ステップS6)。ステップS6において、流量計出力値が設定値を超えないときには、ステップ5に戻る。ステップS6において、流量計出力値が設定値を超えるときには、以下のステップS7を実施する。
図8は、第2の実施形態に係る呼気診断装置の動作を例示する模式図である。
図8に示すように、本実施形態においては、測定期間Pm1の動作が複数回、連続して実施される。すなわち、図7に関して説明したステップS1〜S9が、複数回、実施される。
図9(a)は、模式的斜視図である。図9(b)は、図9(a)のA1−A2線断面図である。図9(c)は、光源部30の動作を例示する模式図である。
この例では、光源部30として、半導体発光素子30aLが用いられる。半導体発光素子30aLとして、レーザが用いられる。この例では、量子カスケードレーザが用いられる。
Claims (7)
- 二酸化炭素の第1同位体と、二酸化炭素の第2同位体と、を含む呼気を含む試料気体が導入される空間を含むセル部と、
前記空間に光を入射させる光源部であって、前記光の波長を、4.34マイクロメートル以上4.39マイクロメートル以下の波長帯内で変化させる、光源部と、
前記試料気体が導入されている前記空間を通過した前記光の強度の第1検出と、前記試料気体が導入されていない前記空間を通過した前記光の強度の第2検出と、を含む動作を実施する検出部と、
前記第1検出の結果と、前記第2検出の結果と、に基づいて、前記試料気体中における前記第1同位体の量に対する前記第2同位体の量の比を算出する制御部と、
を備えた呼気診断装置。 - 前記光源部は、
複数の量子井戸のサブバンドにおける電子のエネルギー緩和により発光光を放射する半導体発光素子と、
前記発光光の波長を調整して前記光を生成する波長制御部と、
を含む請求項1記載の呼気診断装置。 - 前記制御部は、前記比の算出を複数回実施する請求項1記載の呼気診断装置。
- 前記試料気体が導入されるガス導入部と、
第1配管と、
第2配管と、
をさらに備え、
前記第1配管の一端は前記ガス導入部に接続され、前記第1配管の他端は外界と接続され、
前記第2配管の一端は、前記第1配管または前記ガス導入部に接続され、前記第2配管の他端は、前記セル部に接続される請求項1記載の呼気診断装置。 - 前記第1配管を流れる試料気体の量は、前記第2配管を流れる試料気体の量よりも多い請求項4記載の呼気診断装置。
- 前記セル部に外界から空気を導入する第3配管をさらに備え、
前記第3配管は、前記外界から導入された前記空気における二酸化炭素の量を減少させるフィルタを含む請求項4記載の呼気診断装置。 - 前記検出部は、半導体センサ素子を含む請求項1記載の呼気診断装置。
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WO2016047169A1 (ja) | 2016-03-31 |
US20160377534A1 (en) | 2016-12-29 |
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