JPS57139651A - Humidity sensor - Google Patents

Humidity sensor

Info

Publication number
JPS57139651A
JPS57139651A JP2576781A JP2576781A JPS57139651A JP S57139651 A JPS57139651 A JP S57139651A JP 2576781 A JP2576781 A JP 2576781A JP 2576781 A JP2576781 A JP 2576781A JP S57139651 A JPS57139651 A JP S57139651A
Authority
JP
Japan
Prior art keywords
carbon fibers
detecting part
humidity
electrodes
humidity sensor
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
JP2576781A
Other languages
Japanese (ja)
Other versions
JPH0117103B2 (en
Inventor
Hidetaka Shintaku
Nobutoshi Gako
Yasukuni Yamane
Chuji Suzuki
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP2576781A priority Critical patent/JPS57139651A/en
Publication of JPS57139651A publication Critical patent/JPS57139651A/en
Publication of JPH0117103B2 publication Critical patent/JPH0117103B2/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
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/121—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid for determining moisture content, e.g. humidity, of the fluid

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)

Abstract

PURPOSE:To form the compact, light, highly reliable humidity sensor having less temperature dependence at low cost, by embedding a plurality of carbon fibers in a humidity sensitive resin layer, and detecting the variation in electric resistance between said fibers. CONSTITUTION:A detecting part 1, wherein the two carbon fibers are embedded in the humidity sensitive resin (e.g. nylon) so that they are crossed at a right angle, is closely contacted with a substrate 2 (a glass plate, alumina plate, and the like). Then electrodes 3 are formed at the ends of the carbon fibers extended from the detecting part 1 by using conductive paste. Lead wires 4 are further extended from the electrodes 3. The electrodes 3 are coated by a bonding agent 5 such as epoxy series resin. Thus the humidity sensor is obtained. In said sensor, when the resin in the detecting part 1 is expanded in the width direction by absorbing the moisture in the surrounding environment, the interval between the carbon fibers in the detecting part 1 is increased, and the contact resistance is increased. By measuring the value of the electric resistance between the carbon fibers, the humidity of the surrounding environment can be obtained.
JP2576781A 1981-02-23 1981-02-23 Humidity sensor Granted JPS57139651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2576781A JPS57139651A (en) 1981-02-23 1981-02-23 Humidity sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2576781A JPS57139651A (en) 1981-02-23 1981-02-23 Humidity sensor

Publications (2)

Publication Number Publication Date
JPS57139651A true JPS57139651A (en) 1982-08-28
JPH0117103B2 JPH0117103B2 (en) 1989-03-29

Family

ID=12174983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2576781A Granted JPS57139651A (en) 1981-02-23 1981-02-23 Humidity sensor

Country Status (1)

Country Link
JP (1) JPS57139651A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4489603A (en) * 1981-09-09 1984-12-25 Nippon Soken, Inc. Moisture sensitive element
JPS60200152A (en) * 1984-03-24 1985-10-09 Nisshinbo Ind Inc Humidity-sensitive element
GB2322452A (en) * 1997-02-25 1998-08-26 Toshikazu Suda Electrical resistance type humidity sensor with temperature compensation
JP2012023224A (en) * 2010-07-15 2012-02-02 National Institute Of Advanced Industrial & Technology Electrochemical device using porous electrode

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4967685A (en) * 1972-09-20 1974-07-01
JPS5433084A (en) * 1977-08-18 1979-03-10 Matsushita Electric Ind Co Ltd Humidity sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4967685A (en) * 1972-09-20 1974-07-01
JPS5433084A (en) * 1977-08-18 1979-03-10 Matsushita Electric Ind Co Ltd Humidity sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4489603A (en) * 1981-09-09 1984-12-25 Nippon Soken, Inc. Moisture sensitive element
JPS60200152A (en) * 1984-03-24 1985-10-09 Nisshinbo Ind Inc Humidity-sensitive element
GB2322452A (en) * 1997-02-25 1998-08-26 Toshikazu Suda Electrical resistance type humidity sensor with temperature compensation
GB2322452B (en) * 1997-02-25 1999-03-17 Toshikazu Suda Electrical resistance type humidity sensor
JP2012023224A (en) * 2010-07-15 2012-02-02 National Institute Of Advanced Industrial & Technology Electrochemical device using porous electrode

Also Published As

Publication number Publication date
JPH0117103B2 (en) 1989-03-29

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