JP5603870B2 - 波長変調スペクトロスコピー装置の較正方法 - Google Patents
波長変調スペクトロスコピー装置の較正方法 Download PDFInfo
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- JP5603870B2 JP5603870B2 JP2011531053A JP2011531053A JP5603870B2 JP 5603870 B2 JP5603870 B2 JP 5603870B2 JP 2011531053 A JP2011531053 A JP 2011531053A JP 2011531053 A JP2011531053 A JP 2011531053A JP 5603870 B2 JP5603870 B2 JP 5603870B2
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- sample gas
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- 238000000034 method Methods 0.000 title claims description 46
- 238000004611 spectroscopical analysis Methods 0.000 title claims description 25
- 239000012491 analyte Substances 0.000 claims description 43
- 238000001228 spectrum Methods 0.000 claims description 36
- 230000001419 dependent effect Effects 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 230000003595 spectral effect Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 88
- 238000013461 design Methods 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 7
- 230000005855 radiation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 231100001261 hazardous Toxicity 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/42—Absorption spectrometry; Double beam spectrometry; Flicker spectrometry; Reflection spectrometry
- G01J3/433—Modulation spectrometry; Derivative spectrometry
- G01J3/4338—Frequency modulated spectrometry
Description
Lは吸収経路長であり、
S(T)はスペクトル線強度であり、
Φ(ν)はスペクトル線プロファイル関数であり、
ν0はスペクトル線遷移周波数[cm−1]であり、
aは波長変調振幅であり、
ωはω=2πfであるような変調周波数(f)に関する角周波数であり、また
bは高調波スペクトルのノイズフロアからの寄与に対応する遮断係数である。ノイズフロアのために、検体濃度Xがゼロに等しい場合であっても、通常はスペクトル振幅Hn,m(ν0,a)をゼロに至らせることは不可能であり、このため非ゼロの遮断係数bが必要である。
Q(T)は内部分配総和(total internal partition sum)であり、
c2=1.4387752cmKは第2放射定数であり、また
気体特異的かつ温度依存的とすることが可能な実効圧力拡張係数γは次式のように定義することができる。
105 サンプル気体
110 圧力センサ
115 温度センサ
120 検出器
125 電子回路
Claims (9)
- サンプル気体内で検体の濃度を計測するように構成された波長変調スペクトロスコピー装置を較正する方法であって、
第1のサンプル気体の基準圧力及び前記第1のサンプル気体の基準温度に対応する第1の傾斜係数を決定しかつノイズフロアからの寄与を反映している遮断係数を決定するステップであって、前記第1のサンプル気体の前記基準圧力及び前記基準温度における前記検体の既知濃度の第1の複数の高調波スペクトルに基づいている決定ステップと、
スペクトル線強度を反映している温度依存定数に関する複数の値を決定しかつ前記第1のサンプル気体の温度の複数の値において実効圧力拡張係数の複数の値を決定するステップであって、前記遮断係数並びに前記第1のサンプル気体の前記複数の温度値における前記検体の1つまたは複数の既知濃度の第2の複数の高調波スペクトルに基づいている決定ステップと、
前記第1のサンプル気体に関する前記実効圧力拡張係数の温度依存性指数を決定するステップと、
前記第1のサンプル気体に関する較正関数の複数の値を決定するステップであって、前記温度依存定数の前記複数の値並びに前記温度依存性指数に基づいて算定した複数の実効圧力拡張係数値に基づいている決定ステップと、
を含む方法。 - 前記第1のサンプル気体の前記基準圧力及び前記基準温度に対応する第2の傾斜係数を決定しかつノイズフロアからの寄与を反映している第2の遮断係数を決定するステップであって、前記第1のサンプル気体の前記基準圧力及び前記基準温度における前記検体の既知濃度の第3の複数の高調波スペクトルに基づいている決定ステップと、
前記第2の傾斜係数と前記第1の傾斜係数の比に基づいて換算係数を決定するステップと、
前記第1のサンプル気体に関する前記較正関数の前記複数の値を前記換算係数だけスケール換算するステップと、
をさら含む請求項1に記載の方法。 - 前記方法が第2のサンプル気体に関して実行されており、前記第2のサンプル気体に関する較正関数の複数の値が決定されている、請求項1に記載の方法。
- 前記第1のサンプル気体の前記基準圧力及び前記基準温度に対応する第2の傾斜係数を決定しかつノイズフロアからの寄与を反映している第2の遮断係数を決定するステップであって、前記第1のサンプル気体の前記基準圧力及び前記基準温度における前記検体の既知濃度の第3の複数の高調波スペクトルに基づいている決定ステップと、
前記第2の傾斜係数と前記第1の傾斜係数の比に基づいて換算係数を決定するステップと、
前記第2のサンプル気体に関する前記較正関数の前記複数の値を前記換算係数だけスケール換算するステップと、
をさら含む請求項3に記載の方法。 - 前記第2のサンプル気体が危険でありかつ前記第1のサンプル気体が前記第2のサンプル気体に比べて安全である、請求項4に記載の方法。
- 前記装置の製造段階中またはこれ以前に実行される請求項1に記載の方法。
- 前記装置の製造段階中またはこれ以前に実行される請求項3に記載の方法。
- 前記装置の製造段階中またはこれ以後に実行される請求項2に記載の方法。
- 前記装置の製造段階中またはこれ以後に実行される請求項4に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/249,096 | 2008-10-10 | ||
US12/249,096 US7943915B2 (en) | 2008-10-10 | 2008-10-10 | Method of calibrating a wavelength-modulation spectroscopy apparatus |
PCT/US2009/057227 WO2010042300A1 (en) | 2008-10-10 | 2009-09-17 | Method of calibrating a wavelength-modulation spectroscopy apparatus |
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Publication Number | Publication Date |
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JP2012505404A JP2012505404A (ja) | 2012-03-01 |
JP5603870B2 true JP5603870B2 (ja) | 2014-10-08 |
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JP2011531053A Active JP5603870B2 (ja) | 2008-10-10 | 2009-09-17 | 波長変調スペクトロスコピー装置の較正方法 |
Country Status (6)
Country | Link |
---|---|
US (3) | US7943915B2 (ja) |
EP (1) | EP2338042A1 (ja) |
JP (1) | JP5603870B2 (ja) |
CN (1) | CN102177422B (ja) |
BR (1) | BRPI0914076A2 (ja) |
WO (1) | WO2010042300A1 (ja) |
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2009
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- 2009-09-17 EP EP09792637A patent/EP2338042A1/en not_active Withdrawn
- 2009-09-17 CN CN200980140602.4A patent/CN102177422B/zh not_active Expired - Fee Related
- 2009-09-17 JP JP2011531053A patent/JP5603870B2/ja active Active
- 2009-09-17 WO PCT/US2009/057227 patent/WO2010042300A1/en active Application Filing
-
2011
- 2011-04-11 US US13/083,697 patent/US8217376B2/en not_active Expired - Fee Related
- 2011-04-11 US US13/083,704 patent/US8026499B2/en active Active
Also Published As
Publication number | Publication date |
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CN102177422B (zh) | 2014-07-09 |
JP2012505404A (ja) | 2012-03-01 |
US20100089117A1 (en) | 2010-04-15 |
US8217376B2 (en) | 2012-07-10 |
US7943915B2 (en) | 2011-05-17 |
US20110181877A1 (en) | 2011-07-28 |
WO2010042300A1 (en) | 2010-04-15 |
CN102177422A (zh) | 2011-09-07 |
BRPI0914076A2 (pt) | 2018-05-29 |
EP2338042A1 (en) | 2011-06-29 |
US20110181876A1 (en) | 2011-07-28 |
US8026499B2 (en) | 2011-09-27 |
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