JP2014132241A - ガス検出装置 - Google Patents
ガス検出装置 Download PDFInfo
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- JP2014132241A JP2014132241A JP2013000494A JP2013000494A JP2014132241A JP 2014132241 A JP2014132241 A JP 2014132241A JP 2013000494 A JP2013000494 A JP 2013000494A JP 2013000494 A JP2013000494 A JP 2013000494A JP 2014132241 A JP2014132241 A JP 2014132241A
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Abstract
【解決手段】ガス検出装置は、ガス濃度に応じて抵抗値が変化する感ガス体20と、感ガス体20を加熱するヒータ用抵抗21と、電池14を電源としてヒータ用抵抗21にパルス電圧を供給するヒータ駆動部13と、ガス検出部10cと、電圧測定部10bと、制御部10aとを備える。電圧測定部10bは、ヒータ用抵抗21に印加されるパルス電圧を測定する。ヒータ用抵抗21にパルス電圧が印加されている間に電圧測定部10bによって測定された電圧値に基づいて、制御部10aはヒータ用抵抗21に供給する電力量が一定となるようにヒータ用抵抗21に次回印加するパルス電圧の時間幅を制御する。
【選択図】図1
Description
12 電圧安定化回路
13 ヒータ駆動部
14 電池
20 感ガス体
21 ヒータ用抵抗
22 中心電極
Q1 スイッチング素子(ヒータ駆動部)
Q2 トランジスタ
R1 負荷抵抗
Claims (4)
- ガス濃度に応じて抵抗値が変化する感ガス体と、
前記感ガス体の抵抗値からガスを検出するためのガス検出部と、
前記感ガス体を加熱するヒータ用抵抗と、
前記ヒータ用抵抗にパルス電圧を供給するヒータ駆動部と、
前記ヒータ用抵抗に印加されるパルス電圧を測定する電圧測定部と、
前記ヒータ用抵抗にパルス電圧が印加されている間に前記電圧測定部によって測定された電圧値に基づいて前記ヒータ用抵抗に供給する電力量が一定となるように前記ヒータ駆動部が前記ヒータ用抵抗に次回印加するパルス電圧の時間幅を制御する制御部と、
を備えたことを特徴とするガス検出装置。 - 前記ヒータ駆動部は、電池を電源として前記ヒータ用抵抗にパルス電圧を供給し、
前記電圧測定部は、前記ヒータ用抵抗へ印加中のパルス電圧の電圧値を継続的に測定することを特徴とする請求項1記載のガス検出装置。 - 前記ヒータ駆動部は、電池を電源として前記ヒータ用抵抗にパルス電圧を供給し、
前記電圧測定部は、前記ヒータ用抵抗へ印加中のパルス電圧の電圧値を、パルス電圧の印加開始時及び印加終了時に測定することを特徴とする請求項1記載のガス検出装置。 - 前記ヒータ駆動部は、電池を電源として前記ヒータ用抵抗にパルス電圧を供給し、
前記電圧測定部は、前記ヒータ用抵抗へ印加中のパルス電圧の電圧値を、印加時間の半分が経過した時点で測定することを特徴とする請求項1記載のガス検出装置。
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JP2013000494A JP6244562B2 (ja) | 2013-01-07 | 2013-01-07 | ガス検出装置 |
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JP2013000494A JP6244562B2 (ja) | 2013-01-07 | 2013-01-07 | ガス検出装置 |
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JP2014132241A true JP2014132241A (ja) | 2014-07-17 |
JP6244562B2 JP6244562B2 (ja) | 2017-12-13 |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3550295A1 (en) * | 2018-04-05 | 2019-10-09 | Alpha M.O.S. | Gas sensor with a configurable heating element, and methods exploiting the configurability |
IT201800004621A1 (it) * | 2018-04-17 | 2019-10-17 | Dispositivo optoelettronico ad elevata sensibilita' per la rilevazione di specie chimiche e relativo metodo di fabbricazione | |
US10797196B2 (en) | 2018-04-17 | 2020-10-06 | Stmicroelectronics S.R.L. | Photodetector including a Geiger mode avalanche photodiode and an integrated resistor and related manufacturing method |
US11139411B2 (en) | 2018-04-17 | 2021-10-05 | Stmicroelectronics S.R.L. | High sensitivity semiconductor device for detecting fluid chemical species and related manufacturing method |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06331584A (ja) * | 1993-05-21 | 1994-12-02 | Nohmi Bosai Ltd | 環境センサ |
JPH08278279A (ja) * | 1994-08-05 | 1996-10-22 | Nippondenso Co Ltd | 酸素センサのヒータ制御装置 |
JPH11248659A (ja) * | 1998-03-04 | 1999-09-17 | Fuji Electric Co Ltd | ガス検知警報器 |
JP2007309751A (ja) * | 2006-05-17 | 2007-11-29 | Ngk Spark Plug Co Ltd | ガス検出装置 |
JP2009210341A (ja) * | 2008-03-03 | 2009-09-17 | Osaka Gas Co Ltd | ガス検知装置 |
JP2009244236A (ja) * | 2008-04-01 | 2009-10-22 | Hanshin Electric Co Ltd | 臭い検知装置 |
JP2012164095A (ja) * | 2011-02-04 | 2012-08-30 | Fuji Electric Co Ltd | ガス警報器、ガス警報器におけるガスセンサのヒータ温度制御方法 |
US20120297860A1 (en) * | 2011-05-26 | 2012-11-29 | Figaro Engineering Inc. | Gas detection apparatus and gas detection method |
-
2013
- 2013-01-07 JP JP2013000494A patent/JP6244562B2/ja active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06331584A (ja) * | 1993-05-21 | 1994-12-02 | Nohmi Bosai Ltd | 環境センサ |
JPH08278279A (ja) * | 1994-08-05 | 1996-10-22 | Nippondenso Co Ltd | 酸素センサのヒータ制御装置 |
JPH11248659A (ja) * | 1998-03-04 | 1999-09-17 | Fuji Electric Co Ltd | ガス検知警報器 |
JP2007309751A (ja) * | 2006-05-17 | 2007-11-29 | Ngk Spark Plug Co Ltd | ガス検出装置 |
JP2009210341A (ja) * | 2008-03-03 | 2009-09-17 | Osaka Gas Co Ltd | ガス検知装置 |
JP2009244236A (ja) * | 2008-04-01 | 2009-10-22 | Hanshin Electric Co Ltd | 臭い検知装置 |
JP2012164095A (ja) * | 2011-02-04 | 2012-08-30 | Fuji Electric Co Ltd | ガス警報器、ガス警報器におけるガスセンサのヒータ温度制御方法 |
US20120297860A1 (en) * | 2011-05-26 | 2012-11-29 | Figaro Engineering Inc. | Gas detection apparatus and gas detection method |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3550295A1 (en) * | 2018-04-05 | 2019-10-09 | Alpha M.O.S. | Gas sensor with a configurable heating element, and methods exploiting the configurability |
US11402347B2 (en) | 2018-04-05 | 2022-08-02 | Alpha M.O.S. | Gas sensor with a configurable heating element, and methods exploiting the configurability |
IT201800004621A1 (it) * | 2018-04-17 | 2019-10-17 | Dispositivo optoelettronico ad elevata sensibilita' per la rilevazione di specie chimiche e relativo metodo di fabbricazione | |
US10797196B2 (en) | 2018-04-17 | 2020-10-06 | Stmicroelectronics S.R.L. | Photodetector including a Geiger mode avalanche photodiode and an integrated resistor and related manufacturing method |
US11139411B2 (en) | 2018-04-17 | 2021-10-05 | Stmicroelectronics S.R.L. | High sensitivity semiconductor device for detecting fluid chemical species and related manufacturing method |
US11171255B2 (en) | 2018-04-17 | 2021-11-09 | Stmicroelectronics S.R.L. | High sensitivity optoelectronic device for detecting chemical species and related manufacturing method |
US11670732B2 (en) | 2018-04-17 | 2023-06-06 | Stmicroelectronics S.R.L. | High sensitivity semiconductor device for detecting fluid chemical species and related manufacturing method |
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