JPS5769237A - Temperature and humidity sensing device - Google Patents
Temperature and humidity sensing deviceInfo
- Publication number
- JPS5769237A JPS5769237A JP14614680A JP14614680A JPS5769237A JP S5769237 A JPS5769237 A JP S5769237A JP 14614680 A JP14614680 A JP 14614680A JP 14614680 A JP14614680 A JP 14614680A JP S5769237 A JPS5769237 A JP S5769237A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- humidity
- compensated
- frequency
- circuit
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/045—Circuits
- G01N27/046—Circuits provided with temperature compensation
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- 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 obtain himidity which is compensated by temperature and temperature compensated by himidity, by connecting a parallel circuit of a fixed resistor element and a fixed capacitor element to a solid state temperature and humidity sensing element, and applying AC signals having two different freuqnecies on said circuit. CONSTITUTION:The output frequency of an osicllator 1 is a high frequency so that the capacity value of the solid state temperature and humidity element 4 does not have humidity dependence characteristics and the impedance value due to the element capacity is sufficiently smaller than the resistance value in the range of measurement. The output frequency of a frequency divider 2 is a frequency so that the impedance due to the capacitor in the sensing element 4 is sufficiently lower than the resistance value of the element. The outputs of the oscillator 1 and the freuqnecy divider 2 are alternately applied to the sensing element 4 via selecting circuit 3. A divided voltage V0 at a point P is converted into DC by a rectifier 5, held at a holding circuit 6, and converted into a digital signal by an A/D converter 7. Then specified computation is performed, and the humidity which is compensated by the temperature and the temperature which is compensated by the humidity are obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14614680A JPS5769237A (en) | 1980-10-17 | 1980-10-17 | Temperature and humidity sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14614680A JPS5769237A (en) | 1980-10-17 | 1980-10-17 | Temperature and humidity sensing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5769237A true JPS5769237A (en) | 1982-04-27 |
| JPS6152945B2 JPS6152945B2 (en) | 1986-11-15 |
Family
ID=15401172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14614680A Granted JPS5769237A (en) | 1980-10-17 | 1980-10-17 | Temperature and humidity sensing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5769237A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6080751A (en) * | 1983-10-12 | 1985-05-08 | Hitachi Ltd | Operating circuit of organic polymer type humidity sensor |
| CN102967631A (en) * | 2012-11-09 | 2013-03-13 | 苏州沃斯汀新材料有限公司 | Dew point measurement circuit based on lithium chloride hygristor |
| CN105241571A (en) * | 2015-09-21 | 2016-01-13 | 长安大学 | Application of employing N and Mo for improving temperature-sensitive characteristics of oxidized graphene |
| CN112015219A (en) * | 2020-08-26 | 2020-12-01 | 广东电网有限责任公司广州供电局 | Humidity sensing circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547433A (en) * | 1978-10-02 | 1980-04-03 | Shiro Haruyama | Method of corrosion rate measurement and its device |
-
1980
- 1980-10-17 JP JP14614680A patent/JPS5769237A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547433A (en) * | 1978-10-02 | 1980-04-03 | Shiro Haruyama | Method of corrosion rate measurement and its device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6080751A (en) * | 1983-10-12 | 1985-05-08 | Hitachi Ltd | Operating circuit of organic polymer type humidity sensor |
| CN102967631A (en) * | 2012-11-09 | 2013-03-13 | 苏州沃斯汀新材料有限公司 | Dew point measurement circuit based on lithium chloride hygristor |
| CN105241571A (en) * | 2015-09-21 | 2016-01-13 | 长安大学 | Application of employing N and Mo for improving temperature-sensitive characteristics of oxidized graphene |
| CN112015219A (en) * | 2020-08-26 | 2020-12-01 | 广东电网有限责任公司广州供电局 | Humidity sensing circuit |
| CN112015219B (en) * | 2020-08-26 | 2022-04-01 | 广东电网有限责任公司广州供电局 | Humidity sensing circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6152945B2 (en) | 1986-11-15 |
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