JP4714612B2 - ガス濃度測定装置 - Google Patents
ガス濃度測定装置 Download PDFInfo
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- JP4714612B2 JP4714612B2 JP2006077215A JP2006077215A JP4714612B2 JP 4714612 B2 JP4714612 B2 JP 4714612B2 JP 2006077215 A JP2006077215 A JP 2006077215A JP 2006077215 A JP2006077215 A JP 2006077215A JP 4714612 B2 JP4714612 B2 JP 4714612B2
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- electrochemical
- circuit
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- concentration
- operational amplifier
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Description
FET 電界効果トランジスタ(スイッチ手段)
IC2 第2スイッチ回路(スイッチ手段)
Ron,Rp 抵抗
Rs 高周波ゲイン特性低減用抵抗
Claims (1)
- 周辺雰囲気中の対象ガスの濃度に応じて電気化学式ガスセンサから出力されるガス濃度信号を、間欠的な電源のON中に高周波ゲイン特性低減用抵抗を介してオペアンプに入力させて増幅し、増幅後のガス濃度信号により前記電気化学式ガスセンサの周辺雰囲気の対象ガス濃度を測定するガス濃度測定装置において、
前記電源のOFF中に、前記オペアンプから切り離された前記電気化学式ガスセンサに接続され、前記電源のON中に、前記オペアンプに接続された前記電気化学式ガスセンサから切り離される閉ループを備え、
前記電源のON中に前記電気化学式ガスセンサと前記高周波ゲイン特性低減用抵抗とで構成されるON側遅延回路の時定数と、前記電源のOFF中に前記電気化学式ガスセンサと前記閉ループ上の全抵抗要素とで構成されるOFF側遅延回路の時定数とが一致する値に、前記高周波ゲイン特性低減用抵抗の抵抗値又は前記閉ループ上の全抵抗要素の合成抵抗値を設定した、
ことを特徴とするガス濃度測定装置。
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JP2006077215A JP4714612B2 (ja) | 2006-03-20 | 2006-03-20 | ガス濃度測定装置 |
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JP2006077215A JP4714612B2 (ja) | 2006-03-20 | 2006-03-20 | ガス濃度測定装置 |
Publications (2)
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JP2007255923A JP2007255923A (ja) | 2007-10-04 |
JP4714612B2 true JP4714612B2 (ja) | 2011-06-29 |
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JP2006077215A Active JP4714612B2 (ja) | 2006-03-20 | 2006-03-20 | ガス濃度測定装置 |
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Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6594704B2 (ja) * | 2015-08-26 | 2019-10-23 | 矢崎エナジーシステム株式会社 | ガス警報器 |
KR20210022318A (ko) * | 2019-08-20 | 2021-03-03 | 삼성전자주식회사 | 가스 농도 측정 장치 및 방법 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5650054A (en) * | 1995-01-31 | 1997-07-22 | Atwood Industries, Inc. | Low cost room temperature electrochemical carbon monoxide and toxic gas sensor with humidity compensation based on protonic conductive membranes |
US6200443B1 (en) * | 1998-09-29 | 2001-03-13 | Atwood Industries, Inc. | Gas sensor with a diagnostic device |
JP2003329637A (ja) * | 2002-05-09 | 2003-11-19 | Denso Corp | ガスセンサの電流検出装置 |
JP4194085B2 (ja) * | 2003-03-18 | 2008-12-10 | フィガロ技研株式会社 | プロトン導電体ガスセンサの自己診断方法とガス検出装置 |
US7090755B2 (en) * | 2004-10-28 | 2006-08-15 | Figaro Engineering Inc. | Gas detecting device with self-diagnosis for electrochemical gas sensor |
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2006
- 2006-03-20 JP JP2006077215A patent/JP4714612B2/ja active Active
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