JPH03116489U - - Google Patents
Info
- Publication number
- JPH03116489U JPH03116489U JP2344190U JP2344190U JPH03116489U JP H03116489 U JPH03116489 U JP H03116489U JP 2344190 U JP2344190 U JP 2344190U JP 2344190 U JP2344190 U JP 2344190U JP H03116489 U JPH03116489 U JP H03116489U
- Authority
- JP
- Japan
- Prior art keywords
- gas
- detection device
- heat cleaning
- gas sensor
- resistance value
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims 2
- 150000004706 metal oxides Chemical class 0.000 claims 2
- 239000004065 semiconductor Substances 0.000 claims 2
- 230000006641 stabilisation Effects 0.000 claims 2
- 238000011105 stabilization Methods 0.000 claims 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000001052 transient effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Emergency Alarm Devices (AREA)
Description
第１図は実施例の回路図、第２図は実施例に用
いるマイクロコンピユータの回路図、第３図は実
施例の動作シーケンスを示すフローチヤートであ
る。第４図はヒートクリーニング動作の波形図、
第５図はヒートクリーニングの動作シーケンスを
示すフローチヤートである。第６図は実施例の動
作モードの決定を示すフローチヤート、第７図は
検出パラメータＩ１〜Ｉ５の決定を示すフローチ
ヤートである。第８図は基準値Ｒ０の更新を示す
動作フローチヤート、第９図は基準値Ｒ０の更新
を示す波形図である。第１０図はガスの検出とガ
ス濃度の表示とを示すフローチヤート、第１１図
、第１２図はガス濃度の表示を示す波形図である
。第１３図は、トラブルの検出を示すフローチヤ
ート、第１４図はガスセンサの異常検出を示す波
形図である。第１５図はデモンストレーシヨン・
モードの波形図、第１６図はデモンストレーシヨ
ン・モードのフローチヤートである。
図において、２……マイクロコンピユータ、４
……ガスセンサ、５０……ＬＥＤレベルメータ、
５２……ブザー、Ｒｓ……センサ抵抗、Ｒ０……
基準値。
FIG. 1 is a circuit diagram of the embodiment, FIG. 2 is a circuit diagram of a microcomputer used in the embodiment, and FIG. 3 is a flowchart showing the operation sequence of the embodiment. Figure 4 is a waveform diagram of heat cleaning operation.
FIG. 5 is a flowchart showing the operation sequence of heat cleaning. FIG. 6 is a flowchart showing the determination of the operation mode of the embodiment, and FIG. 7 is a flowchart showing the determination of the detection parameters I1 to I5 . FIG. 8 is an operation flowchart showing the updating of the reference value R0 , and FIG. 9 is a waveform diagram showing the updating of the reference value R0 . FIG. 10 is a flowchart showing gas detection and gas concentration display, and FIGS. 11 and 12 are waveform diagrams showing gas concentration display. FIG. 13 is a flowchart showing trouble detection, and FIG. 14 is a waveform chart showing abnormality detection of the gas sensor. Figure 15 shows the demonstration
The mode waveform diagram, FIG. 16, is a flowchart of the demonstration mode. In the figure, 2...microcomputer, 4
...Gas sensor, 50...LED level meter,
52... Buzzer, Rs... Sensor resistance, R 0 ...
Reference value.
Claims (1)
導体と、金属酸化物半導体の加熱用ヒータとを設
けたガスセンサを用い、金属酸化物半導体の抵抗
値の変化からガスを検出すると共に、装置の使用
開始時にヒータに通常電力よりも高い電力を加え
て、ガスセンサをヒートクリーニングするように
したガス検出装置において、 ヒートクリーニング後のガスセンサの抵抗値の
安定化を検出して、ヒートクリーニングを終了さ
せる手段を設けたことを特徴とするガス検出装置
。 (2) 実用新案登録請求の範囲第１項記載のガス
検出装置において、 ヒートクリーニング終了後のガスセンサの抵抗
値の安定化を検出して、ヒートクリーニング終了
後の過渡現象の終了を検出するための手段を設け
たことを特徴とする、ガス検出装置。[Claims for Utility Model Registration] (1) Using a gas sensor equipped with a metal oxide semiconductor whose resistance value changes depending on gas and a heater for heating the metal oxide semiconductor, In a gas detection device that detects gas and heat-cleans the gas sensor by applying higher power than normal power to the heater at the beginning of use of the device, the stabilization of the resistance value of the gas sensor after heat cleaning is detected. A gas detection device characterized in that a means for terminating heat cleaning is provided. (2) In the gas detection device according to claim 1 of the utility model registration claim, a method for detecting the stabilization of the resistance value of the gas sensor after the heat cleaning is completed, and detecting the end of the transient phenomenon after the heat cleaning is completed. A gas detection device, characterized in that it is provided with means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2344190U JP2526483Y2 (en) | 1990-03-08 | 1990-03-08 | Gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2344190U JP2526483Y2 (en) | 1990-03-08 | 1990-03-08 | Gas detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03116489U true JPH03116489U (en) | 1991-12-03 |
| JP2526483Y2 JP2526483Y2 (en) | 1997-02-19 |
Family
ID=31526426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2344190U Expired - Fee Related JP2526483Y2 (en) | 1990-03-08 | 1990-03-08 | Gas detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526483Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002303598A (en) * | 2001-04-05 | 2002-10-18 | Denso Corp | Gas detection method using gas sensor |
-
1990
- 1990-03-08 JP JP2344190U patent/JP2526483Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002303598A (en) * | 2001-04-05 | 2002-10-18 | Denso Corp | Gas detection method using gas sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2526483Y2 (en) | 1997-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |