JPS5769237A - Temperature and humidity sensing device - Google Patents

Temperature and humidity sensing device

Info

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
Application number
JP14614680A
Other languages
Japanese (ja)
Other versions
JPS6152945B2 (en
Inventor
Osamu Kawasaki
Yukihiko Ise
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP14614680A priority Critical patent/JPS5769237A/en
Publication of JPS5769237A publication Critical patent/JPS5769237A/en
Publication of JPS6152945B2 publication Critical patent/JPS6152945B2/ja
Granted legal-status Critical Current

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

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.
JP14614680A 1980-10-17 1980-10-17 Temperature and humidity sensing device Granted JPS5769237A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (1)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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