JP2019105487A - ガスセンサ - Google Patents
ガスセンサ Download PDFInfo
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- JP2019105487A JP2019105487A JP2017237322A JP2017237322A JP2019105487A JP 2019105487 A JP2019105487 A JP 2019105487A JP 2017237322 A JP2017237322 A JP 2017237322A JP 2017237322 A JP2017237322 A JP 2017237322A JP 2019105487 A JP2019105487 A JP 2019105487A
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- gas
- concentration
- drift correction
- correction value
- thermistor
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
20 信号処理回路
21,22 差動アンプ
23 ボルテージフォロア
24 ADコンバータ
25 DAコンバータ
26 制御部
30A,40A,30B,40B 検出部
31,41 基板
31a,41a キャビティ
32,33,42,43 絶縁膜
34,44 ヒータ保護膜
35,45 サーミスタ電極
36,46 サーミスタ保護膜
37a〜37d,47a〜47d 電極パッド
51 セラミックパッケージ
52 リッド
53 通気口
54 パッケージ電極
55 ボンディングワイヤ
56 外部端子
CT 触媒
DCT ダミー触媒
MH1〜MH4 ヒータ抵抗
R1 抵抗
Rc1,Rd1〜Rd4 サーミスタ
S センサ部
S1 第1のセンサ
S2 第2のセンサ
S3 第3のセンサ
Claims (6)
- 雰囲気中に含まれる検出対象ガスの濃度に応じた検出信号を生成するセンサ部と、
前記センサ部の経時変化を補正するドリフト補正値及び前記検出信号に基づいて、前記検出対象ガスの濃度を示す出力信号を生成する信号処理回路と、を備え、
前記信号処理回路は、前記検出対象ガスの濃度が所定の条件を満たさない場合に、ドリフト補正値の更新動作を禁止することを特徴とするガスセンサ。 - 前記信号処理回路は、所定の周期で、前記検出対象ガスの濃度が前記所定の条件を満たすか否かを判定し、前記所定の条件を満たす場合に、前記ドリフト補正値の更新動作を実行することを特徴とする請求項1に記載のガスセンサ。
- 前記所定の条件は、前記検出対象ガスの濃度変化が所定の範囲内に収まっていることであることを特徴とする請求項1又は2に記載のガスセンサ。
- 前記信号処理回路は、前記検出信号とリファレンス電圧を比較する差動アンプと、少なくとも前記差動アンプの出力に基づいて前記出力信号を演算する制御部とを含むことを特徴とする請求項1乃至3のいずれか一項に記載のガスセンサ。
- 前記ドリフト補正値の更新動作は、前記リファレンス電圧の補正を含むことを特徴とする請求項4に記載のガスセンサ。
- 前記ドリフト補正値の更新動作は、前記出力信号を演算するための演算式の補正を含むことを特徴とする請求項4又は5に記載のガスセンサ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2017237322A JP7307525B2 (ja) | 2017-12-12 | 2017-12-12 | ガスセンサ |
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JP2017237322A JP7307525B2 (ja) | 2017-12-12 | 2017-12-12 | ガスセンサ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2019105487A true JP2019105487A (ja) | 2019-06-27 |
JP7307525B2 JP7307525B2 (ja) | 2023-07-12 |
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JP2017237322A Active JP7307525B2 (ja) | 2017-12-12 | 2017-12-12 | ガスセンサ |
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JP (1) | JP7307525B2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021103137A (ja) * | 2019-12-25 | 2021-07-15 | Tdk株式会社 | ガスセンサ |
JP2021124405A (ja) * | 2020-02-06 | 2021-08-30 | アズビル株式会社 | Co2センサシステム |
JP2021179357A (ja) * | 2020-05-13 | 2021-11-18 | Tdk株式会社 | ガスセンサ |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5459194A (en) * | 1977-10-20 | 1979-05-12 | Sankosha Co Ltd | Gas leakage alarm |
US4443793A (en) * | 1981-11-02 | 1984-04-17 | Calnor Of El Paso | Gas detection system |
JPH07103923A (ja) * | 1993-10-07 | 1995-04-21 | Hitachi Electron Eng Co Ltd | ガス濃度測定装置 |
JPH0915178A (ja) * | 1995-07-03 | 1997-01-17 | Riken Keiki Co Ltd | ガス警報装置 |
JP2003294667A (ja) * | 2002-03-29 | 2003-10-15 | Ngk Spark Plug Co Ltd | ガス検出装置、車両用オートベンチレーションシステム |
JP2007048578A (ja) * | 2005-08-09 | 2007-02-22 | Toyota Motor Corp | 燃料電池システム |
US20120073357A1 (en) * | 2010-09-29 | 2012-03-29 | Thermo Electron Led Gmbh | Method For Determining Gas Concentrations in a Gas Mixture Based on Thermal Conductivity Measurements With Correction of Measured Values |
JP2015224892A (ja) * | 2014-05-26 | 2015-12-14 | 理研計器株式会社 | ガス検知器 |
JP2015227822A (ja) * | 2014-06-02 | 2015-12-17 | Tdk株式会社 | 熱伝導式ガスセンサ |
JP2017156293A (ja) * | 2016-03-04 | 2017-09-07 | Tdk株式会社 | ガス検出装置 |
-
2017
- 2017-12-12 JP JP2017237322A patent/JP7307525B2/ja active Active
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5459194A (en) * | 1977-10-20 | 1979-05-12 | Sankosha Co Ltd | Gas leakage alarm |
US4443793A (en) * | 1981-11-02 | 1984-04-17 | Calnor Of El Paso | Gas detection system |
JPH07103923A (ja) * | 1993-10-07 | 1995-04-21 | Hitachi Electron Eng Co Ltd | ガス濃度測定装置 |
JPH0915178A (ja) * | 1995-07-03 | 1997-01-17 | Riken Keiki Co Ltd | ガス警報装置 |
JP2003294667A (ja) * | 2002-03-29 | 2003-10-15 | Ngk Spark Plug Co Ltd | ガス検出装置、車両用オートベンチレーションシステム |
JP2007048578A (ja) * | 2005-08-09 | 2007-02-22 | Toyota Motor Corp | 燃料電池システム |
US20120073357A1 (en) * | 2010-09-29 | 2012-03-29 | Thermo Electron Led Gmbh | Method For Determining Gas Concentrations in a Gas Mixture Based on Thermal Conductivity Measurements With Correction of Measured Values |
JP2015224892A (ja) * | 2014-05-26 | 2015-12-14 | 理研計器株式会社 | ガス検知器 |
JP2015227822A (ja) * | 2014-06-02 | 2015-12-17 | Tdk株式会社 | 熱伝導式ガスセンサ |
JP2017156293A (ja) * | 2016-03-04 | 2017-09-07 | Tdk株式会社 | ガス検出装置 |
Non-Patent Citations (1)
Title |
---|
JOHN-ERIK HAUGEN ET AL.: "A calibration method for handling the temporal drift of solid state gas-sensors", ANALYTICA CHIMICA ACTA, vol. 407 (2000), JPN7021002912, 7 February 2000 (2000-02-07), pages 23 - 39, ISSN: 0004562540 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2021103137A (ja) * | 2019-12-25 | 2021-07-15 | Tdk株式会社 | ガスセンサ |
JP7306259B2 (ja) | 2019-12-25 | 2023-07-11 | Tdk株式会社 | ガスセンサ |
JP2021124405A (ja) * | 2020-02-06 | 2021-08-30 | アズビル株式会社 | Co2センサシステム |
JP2021179357A (ja) * | 2020-05-13 | 2021-11-18 | Tdk株式会社 | ガスセンサ |
JP7287344B2 (ja) | 2020-05-13 | 2023-06-06 | Tdk株式会社 | ガスセンサ |
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JP7307525B2 (ja) | 2023-07-12 |
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