JP2011043461A5 - - Google Patents

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JP2011043461A5
JP2011043461A5 JP2009193036A JP2009193036A JP2011043461A5 JP 2011043461 A5 JP2011043461 A5 JP 2011043461A5 JP 2009193036 A JP2009193036 A JP 2009193036A JP 2009193036 A JP2009193036 A JP 2009193036A JP 2011043461 A5 JP2011043461 A5 JP 2011043461A5
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signal
pressure
input
pressure value
adc
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JP2009193036A
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JP2011043461A (en
JP5170034B2 (en
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波長走査に伴う吸光測定が終了したあとに、時刻Ｔ3において、圧力計１２による電圧信号がＡＤＣ２７によりデジタル化された圧力値Ｘ2を、再び測定時圧力推定部２８２に取り込む。波長走査の間、圧力値の計測は行われないので、時刻Ｔ2における圧力値は不明である。そこで、測定時圧力推定部２８２は、時刻Ｔ1、Ｔ2、Ｔ3、及び実測の圧力値Ｘ1、Ｘ2からＴ2における被測定ガスの圧力値Ｘadjを推定する。例えば、圧力計１２での検出の応答遅れが無視できるとすれば、最も簡単な推定方法は、次の(13)式による直線補間によるものである。 After the absorption measurement associated with the wavelength scanning is completed, the pressure value X2 obtained by digitizing the voltage signal from the pressure gauge 12 by the ADC 27 is taken into the measurement pressure estimation unit 282 again at time T3. Since the pressure value is not measured during the wavelength scanning, the pressure value at time T2 is unknown. Therefore, the measurement pressure estimation unit 282 estimates the measured gas pressure value Xadj at times T1, T2, and T3 and the actually measured pressure values X1 and X2. For example, if the response delay in detection by the pressure gauge 12 can be ignored, the simplest estimation method is by linear interpolation according to the following equation (13).

この水分測定装置では、光検出部８で得られた電圧信号はアンプ２１で増幅されたあとに、同期検出器２２に入力される。同期検出器２２には、後述する２ｆクロック生成部３１で生成された周波数２ｆのクロック信号が参照信号として入力されており、同期検出器２２は、アンプ２１を通して入力された検出信号から参照信号の位相及び周波数に同期した信号を抽出する。この同期検出信号はＬＰＦ２３により高周波成分が除去され、ＡＤＣ２４によりデジタル信号に変換される。このＡＤＣ２４の出力が演算部２８の濃度演算部２８４に入力される。 In this moisture content measuring device, a voltage signal obtained by the optical detector 8 after being amplified by the amplifier 21 is input to a synchronization detector 2 2. A clock signal having a frequency of 2f generated by a 2f clock generation unit 31 (to be described later) is input to the synchronization detector 22 as a reference signal. The synchronization detector 22 receives a reference signal from the detection signal input through the amplifier 21. A signal synchronized with the phase and frequency is extracted. A high frequency component is removed from the synchronization detection signal by the LPF 23 and converted into a digital signal by the ADC 24. The output of the ADC 24 is input to the concentration calculation unit 284 of the calculation unit 28.

JP2009193036A 2009-08-24 2009-08-24 Gas analyzer Active JP5170034B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009193036A JP5170034B2 (en) 2009-08-24 2009-08-24 Gas analyzer

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Application Number Priority Date Filing Date Title
JP2009193036A JP5170034B2 (en) 2009-08-24 2009-08-24 Gas analyzer

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JP2011043461A JP2011043461A (en) 2011-03-03
JP2011043461A5 true JP2011043461A5 (en) 2011-12-22
JP5170034B2 JP5170034B2 (en) 2013-03-27

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JP2009193036A Active JP5170034B2 (en) 2009-08-24 2009-08-24 Gas analyzer

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5684674B2 (en) * 2011-08-12 2015-03-18 Ｊｆｅスチール株式会社 Analysis method and analyzer
KR102025574B1 (en) 2013-01-18 2019-09-26 삼성전자 주식회사 Apparatus for providing the sample gas and method thereof
JP6477380B2 (en) * 2015-09-16 2019-03-06 株式会社島津製作所 Gas analyzer
US12111254B2 (en) 2019-05-15 2024-10-08 Horiba, Ltd. Sample analyzing apparatus
CN114354849A (en) * 2021-12-27 2022-04-15 汉威科技集团股份有限公司 Multi-cavity gas detection device and implementation method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2703835B2 (en) * 1991-04-26 1998-01-26 東京瓦斯株式会社 Gas concentration measuring method and its measuring device
JP2744742B2 (en) * 1992-11-05 1998-04-28 東京電力株式会社 Gas concentration measuring method and its measuring device
JPH06249779A (en) * 1993-02-26 1994-09-09 Shimadzu Corp Gas analyzer
JP2007240248A (en) * 2006-03-07 2007-09-20 Hitachi Cable Ltd Optical multiple gas concentration detection method and device
JP4715759B2 (en) * 2006-04-25 2011-07-06 株式会社島津製作所 Moisture meter
JP4407731B2 (en) * 2007-08-31 2010-02-03 株式会社デンソー Fuel injection control device

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