JPS5559336A - Humidity detector - Google Patents

Humidity detector

Info

Publication number
JPS5559336A
JPS5559336A JP13277078A JP13277078A JPS5559336A JP S5559336 A JPS5559336 A JP S5559336A JP 13277078 A JP13277078 A JP 13277078A JP 13277078 A JP13277078 A JP 13277078A JP S5559336 A JPS5559336 A JP S5559336A
Authority
JP
Japan
Prior art keywords
circuit
waveform
humidity
signal
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.)
Granted
Application number
JP13277078A
Other languages
Japanese (ja)
Other versions
JPS5841461B2 (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 JP13277078A priority Critical patent/JPS5841461B2/en
Publication of JPS5559336A publication Critical patent/JPS5559336A/en
Publication of JPS5841461B2 publication Critical patent/JPS5841461B2/en
Expired legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)

Abstract

PURPOSE: To ensure a high-accuracy detection for the humidity change by applying the pulse voltage to the differentiating circuit consisting of the capacitor and the humidity detection element and then converting the humidity change into the time for comparison.
CONSTITUTION: The reference signal delivered from oscillator circuit 1 is divided by divider circuit 2, and the output waveform A is applied to the serial circuit of capacitor C2 and resistance R1 as well as to the serial circuit of capacitor C1 and humidity detection element R2 to obtain integral waveform B and differential waveform B'. These both waveforms are supplied to voltage comparator 3, and waveform C is delivered only when the latter waveform features a higher level than the former waveform. Nonostable multivibrators 4W6 deliver pulse signals DWF via the fall of the input pulse, and signal F clears the counting of counter circuit 7. Signal D is reversed and then supplied to circuit 7 along with the output of circuit 1. And circuit 7 counts the output of circuit 1 after the fall of signal F to complete the counting at the rise of signal D. When the humidity lowers, the resistance of element R2 increases to shorten the counting time of circuit 7. Thus the change of humidity can be detected through the comparison with the 1-cycle preceding count value.
COPYRIGHT: (C)1980,JPO&Japio
JP13277078A 1978-10-27 1978-10-27 humidity detection device Expired JPS5841461B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13277078A JPS5841461B2 (en) 1978-10-27 1978-10-27 humidity detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13277078A JPS5841461B2 (en) 1978-10-27 1978-10-27 humidity detection device

Publications (2)

Publication Number Publication Date
JPS5559336A true JPS5559336A (en) 1980-05-02
JPS5841461B2 JPS5841461B2 (en) 1983-09-12

Family

ID=15089141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13277078A Expired JPS5841461B2 (en) 1978-10-27 1978-10-27 humidity detection device

Country Status (1)

Country Link
JP (1) JPS5841461B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1128180A3 (en) * 2000-02-28 2003-10-15 NGK Spark Plug Company Limited Control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1128180A3 (en) * 2000-02-28 2003-10-15 NGK Spark Plug Company Limited Control system
US6714876B2 (en) 2000-02-28 2004-03-30 Ngk Spark Plug Co., Ltd. Control system

Also Published As

Publication number Publication date
JPS5841461B2 (en) 1983-09-12

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