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JPS57101748A - Circuit for detecting signal from dew condensation sensor - Google Patents

Circuit for detecting signal from dew condensation sensor

Info

Publication number
JPS57101748A
JPS57101748A JP17810380A JP17810380A JPS57101748A JP S57101748 A JPS57101748 A JP S57101748A JP 17810380 A JP17810380 A JP 17810380A JP 17810380 A JP17810380 A JP 17810380A JP S57101748 A JPS57101748 A JP S57101748A
Authority
JP
Japan
Prior art keywords
circuit
dew condensation
condensation sensor
resistor
capacitor
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
Application number
JP17810380A
Other languages
Japanese (ja)
Inventor
Akihiro Hagiwara
Toshizo Hara
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.)
Bosch Corp
Original Assignee
Diesel Kiki 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 Diesel Kiki Co Ltd filed Critical Diesel Kiki Co Ltd
Priority to JP17810380A priority Critical patent/JPS57101748A/en
Publication of JPS57101748A publication Critical patent/JPS57101748A/en
Pending 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
    • G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material

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 prevent the polarization phenomenon of the dew condensation sensor, by connecting the dew condensation sensor to a resistor circuit by which an oscillating period of an oscillator is determined and to which AC voltage is applied at the time of the oscillation. CONSTITUTION:The oscillator 10 has an inverter 1. Said inverter 1 has a capacitor circuit 8 including discharge capacitor 2 and a resistor circuit 9 comprising a series circuit of a resistor 3 and the dew condensation sensor 4. Thus a CR oscillator is constituted. When the inverter 1 is connected to a power source, the capacitor 2 is charged through the resistor circuit 9 comprising the resistors 3 and 4. When it is charged to a specified potential, it is inverted and the discharge current flows through the resistor circuit 9. Said charging and discharging are repeated and said oscillating output is obtained through a resistor 6. The period of th charging and discharging depends on the capacity of the capacitor 2 and the resistance of the resistor circuit 9. The period becomes short when the humidity at the dew condensation sensor 4 becomes high, and the period becomes long when the humidity becomes low.
JP17810380A 1980-12-18 1980-12-18 Circuit for detecting signal from dew condensation sensor Pending JPS57101748A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17810380A JPS57101748A (en) 1980-12-18 1980-12-18 Circuit for detecting signal from dew condensation sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17810380A JPS57101748A (en) 1980-12-18 1980-12-18 Circuit for detecting signal from dew condensation sensor

Publications (1)

Publication Number Publication Date
JPS57101748A true JPS57101748A (en) 1982-06-24

Family

ID=16042693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17810380A Pending JPS57101748A (en) 1980-12-18 1980-12-18 Circuit for detecting signal from dew condensation sensor

Country Status (1)

Country Link
JP (1) JPS57101748A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155747A (en) * 1983-02-24 1984-09-04 Nippon Soken Inc Gas sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123098A (en) * 1978-03-16 1979-09-25 Matsushita Electric Ind Co Ltd Moisture detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54123098A (en) * 1978-03-16 1979-09-25 Matsushita Electric Ind Co Ltd Moisture detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59155747A (en) * 1983-02-24 1984-09-04 Nippon Soken Inc Gas sensor

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