JPS5624566A - Gas consentration detecting system - Google Patents
Gas consentration detecting systemInfo
- Publication number
- JPS5624566A JPS5624566A JP9913179A JP9913179A JPS5624566A JP S5624566 A JPS5624566 A JP S5624566A JP 9913179 A JP9913179 A JP 9913179A JP 9913179 A JP9913179 A JP 9913179A JP S5624566 A JPS5624566 A JP S5624566A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- gas concentration
- gas
- constant circuit
- time constant
- 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 Electric Means (AREA)
Abstract
PURPOSE: To enable continuous detection of gas concentration by converting a concentration into time data by means of the time constant circuit comprising a semiconductor gas sensor and a capacitor.
CONSTITUTION: A time constant circuit is composed of a detection element K of a semiconductor gas sensor GS and a capacitor C1. First, a transistor TR1 is energized to discharge the capacitor C1. Then, as soon as the transistor TR2 is energized, a current flows to the time constant circuit from a power source V1 through the trsistor TR2, the element K and the capacitor C1, so that the capacitor C1 is charged gradually. The time until the charged voltage reaches a given level varies in accordance with the resistance value of the element K changing according to the gas concentration. Thereby, by supplying the voltage of the capacitor C1 to the detection circuit having the give threshold level, extraction of the time data corresponding to the gas concentration is enabled, eventually allowing a continuous detection of the gas concentration.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9913179A JPS5624566A (en) | 1979-08-04 | 1979-08-04 | Gas consentration detecting system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9913179A JPS5624566A (en) | 1979-08-04 | 1979-08-04 | Gas consentration detecting system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5624566A true JPS5624566A (en) | 1981-03-09 |
Family
ID=14239182
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9913179A Pending JPS5624566A (en) | 1979-08-04 | 1979-08-04 | Gas consentration detecting system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5624566A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5456897A (en) * | 1989-09-28 | 1995-10-10 | Hyperlon Catalysis Int'l., Inc. | Fibril aggregates and method for making same |
-
1979
- 1979-08-04 JP JP9913179A patent/JPS5624566A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5456897A (en) * | 1989-09-28 | 1995-10-10 | Hyperlon Catalysis Int'l., Inc. | Fibril aggregates and method for making same |
US5726116A (en) * | 1989-09-28 | 1998-03-10 | Hyperion Catalysis International, Inc. | Fibril aggregates and method for making same |
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