JPS6410161A - Gas sensor circuit - Google Patents
Gas sensor circuitInfo
- Publication number
- JPS6410161A JPS6410161A JP16588187A JP16588187A JPS6410161A JP S6410161 A JPS6410161 A JP S6410161A JP 16588187 A JP16588187 A JP 16588187A JP 16588187 A JP16588187 A JP 16588187A JP S6410161 A JPS6410161 A JP S6410161A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- variation
- gas detection
- output
- gas
- 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.)
- Pending
Links
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)
Abstract
PURPOSE:To perform stable and proper gas detection at all times without being affected by variation in source voltage by varying the set voltage of a comparator which compares the output voltage of a gas sensor according to the variation in the source voltage. CONSTITUTION:When ambient gas concentration increases, the sensor resistance value decreases and a gas detection voltage Vg rises. Then when the gas detection voltage Vg exceeds a set voltage Vs', the output of the comparator 12 becomes logic 1. The output of the logic 1 indicates the ambient gas concentration becomes larger than the set value, and then a lamp for annunciation illuminates and a buzzer sounds. Then the set voltage Vs' outputted by a differential amplifier circuit 30 varies following up a heater voltage as shown in a graph owing to variation in the voltage Vd with the source voltage. Namely, the error of the gas detection voltage Gv is compensated by the variation in the set voltage Vs'.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16588187A JPS6410161A (en) | 1987-07-02 | 1987-07-02 | Gas sensor circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16588187A JPS6410161A (en) | 1987-07-02 | 1987-07-02 | Gas sensor circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6410161A true JPS6410161A (en) | 1989-01-13 |
Family
ID=15820752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16588187A Pending JPS6410161A (en) | 1987-07-02 | 1987-07-02 | Gas sensor circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6410161A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013213673A (en) * | 2012-03-09 | 2013-10-17 | Aisan Ind Co Ltd | Sensor device and sensor system |
-
1987
- 1987-07-02 JP JP16588187A patent/JPS6410161A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013213673A (en) * | 2012-03-09 | 2013-10-17 | Aisan Ind Co Ltd | Sensor device and sensor system |
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