JPS6189156U - - Google Patents

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Publication number
JPS6189156U
JPS6189156U JP17466684U JP17466684U JPS6189156U JP S6189156 U JPS6189156 U JP S6189156U JP 17466684 U JP17466684 U JP 17466684U JP 17466684 U JP17466684 U JP 17466684U JP S6189156 U JPS6189156 U JP S6189156U
Authority
JP
Japan
Prior art keywords
gas sensor
gas
temperature range
high temperature
heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP17466684U
Other languages
Japanese (ja)
Other versions
JPH0743646Y2 (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1984174666U priority Critical patent/JPH0743646Y2/en
Publication of JPS6189156U publication Critical patent/JPS6189156U/ja
Application granted granted Critical
Publication of JPH0743646Y2 publication Critical patent/JPH0743646Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図ａは実施例の電気回路のブロツク図、第
１図ｂ，ｃはその要部回路図、第２図はその動作
を現わす波形図、第３図は他の実施例の要部回路
図で有る、第４図はさらに他の実施例の要部回路
図で有る。 ２…電池電源、４…タイマ要素、１２…パルス
幅変調回路、１４，１１４…ガスセンサ、１６，
１８，１１６…ヒータ、Ｔｒ１，Ｔｒ２，Ｔｒ３
，Ｔｒ４…トランジスタ、２２…誤差検出回路、
５０…シフトレジスタ、７０，７２…フリツプフ
ロツプ回路。 Figure 1a is a block diagram of the electric circuit of the embodiment, Figures 1b and c are circuit diagrams of its main parts, Figure 2 is a waveform diagram showing its operation, and Figure 3 is the main part of another embodiment. FIG. 4, which is a circuit diagram, is a circuit diagram of a main part of still another embodiment. 2...Battery power supply, 4...Timer element, 12...Pulse width modulation circuit, 14, 114...Gas sensor, 16,
18, 116...Heater, Tr 1 , Tr 2 , Tr 3
 , Tr 4 ...transistor, 22...error detection circuit,
50...Shift register, 70, 72...Flip-flop circuit.

Claims (1)

【実用新案登録請求の範囲】 電池電源と、 ガスにより抵抗値が変化する金属酸化物半導体
とこの半導体を加熱するためのヒータとを有する
ガスセンサと、 ガスセンサのヒータへの印加電力を周期的に変
化させてガスセンサを高温域と低温域とに周期的
に加熱するためのヒータ制御信号を発し、かつガ
スセンサの低温域への加熱期間内にサンプリング
信号を発するタイマ要素と、 サンプリング信号により動作して低温域におけ
るガスセンサの出力から特定のガスを検出すると
ともに、ガスの検出時にはガスセンサを高温域に
加熱するためのヒートクリーニング信号をタイマ
要素に入力するガス検出回路、 とを有する特定ガス検出装置。[Claims for Utility Model Registration] A gas sensor having a battery power source, a metal oxide semiconductor whose resistance value changes depending on the gas, and a heater for heating this semiconductor, and periodically changing the power applied to the heater of the gas sensor. a timer element that generates a heater control signal to periodically heat the gas sensor to a high temperature range and a low temperature range, and a timer element that generates a sampling signal during the heating period of the gas sensor to the low temperature range; A gas detection circuit that detects a specific gas from the output of a gas sensor in a high temperature range and inputs a heat cleaning signal to a timer element to heat the gas sensor to a high temperature range when gas is detected.
JP1984174666U 1984-11-16 1984-11-16 Specific gas detector Expired - Lifetime JPH0743646Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1984174666U JPH0743646Y2 (en) 1984-11-16 1984-11-16 Specific gas detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984174666U JPH0743646Y2 (en) 1984-11-16 1984-11-16 Specific gas detector

Publications (2)

Publication Number Publication Date
JPS6189156U true JPS6189156U (en) 1986-06-10
JPH0743646Y2 JPH0743646Y2 (en) 1995-10-09

Family

ID=30732285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1984174666U Expired - Lifetime JPH0743646Y2 (en) 1984-11-16 1984-11-16 Specific gas detector

Country Status (1)

Country Link
JP (1) JPH0743646Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012105423A1 (en) * 2011-02-04 2012-08-09 富士電機株式会社 Battery-powered gas alarm and control device thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121391A (en) * 1976-04-06 1977-10-12 Tokai Konetsu Kogyo Kk Gas sensing apparatus with self cleaning mechanisms
JPS53160995U (en) * 1977-05-25 1978-12-16
JPS5515080A (en) * 1978-07-20 1980-02-01 Nichicon Capacitor Ltd Applying unit of gas-sensitive element
JPS57141543A (en) * 1981-02-25 1982-09-01 Hitachi Ltd Gas sensor
JPS57163859A (en) * 1982-03-01 1982-10-08 Fuigaro Giken Kk Gas detector
JPS57184961A (en) * 1981-05-08 1982-11-13 Matsushita Electric Ind Co Ltd Detecting device
JPS60113141A (en) * 1983-11-25 1985-06-19 Shinkosumosu Denki Kk Combustible gas and gaseous co detecting alarm

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121391A (en) * 1976-04-06 1977-10-12 Tokai Konetsu Kogyo Kk Gas sensing apparatus with self cleaning mechanisms
JPS53160995U (en) * 1977-05-25 1978-12-16
JPS5515080A (en) * 1978-07-20 1980-02-01 Nichicon Capacitor Ltd Applying unit of gas-sensitive element
JPS57141543A (en) * 1981-02-25 1982-09-01 Hitachi Ltd Gas sensor
JPS57184961A (en) * 1981-05-08 1982-11-13 Matsushita Electric Ind Co Ltd Detecting device
JPS57163859A (en) * 1982-03-01 1982-10-08 Fuigaro Giken Kk Gas detector
JPS60113141A (en) * 1983-11-25 1985-06-19 Shinkosumosu Denki Kk Combustible gas and gaseous co detecting alarm

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012105423A1 (en) * 2011-02-04 2012-08-09 富士電機株式会社 Battery-powered gas alarm and control device thereof
JP5662484B2 (en) * 2011-02-04 2015-01-28 富士電機株式会社 Battery-powered gas alarm and its control device

Also Published As

Publication number Publication date
JPH0743646Y2 (en) 1995-10-09

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