JPS5670449A - Humidity sensor - Google Patents
Humidity sensorInfo
- Publication number
- JPS5670449A JPS5670449A JP14813379A JP14813379A JPS5670449A JP S5670449 A JPS5670449 A JP S5670449A JP 14813379 A JP14813379 A JP 14813379A JP 14813379 A JP14813379 A JP 14813379A JP S5670449 A JPS5670449 A JP S5670449A
- Authority
- JP
- Japan
- Prior art keywords
- humidity
- humidity sensor
- heater
- dew condensation
- dew
- 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
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 enable normal detection of humidity by attaching a heater around a humidity sensor, making the heater operate when the humidity to be detected exceeds a prescribed humidity to prevent the dew condensation on the surface of the temperature sensor, and eliminating the dew condensing before the start of operation in a short time as well.
CONSTITUTION: The heater 2 is provided as an attachment around the humidity sensor 1. When there is no dew condensation on the surface of the humidity sensor 1, the change of the ambient humidity of the humidity sensor 1 into 93%, for instance, brings about the rise of the voltage of a humidity detection signal Sr from a logarithmic transformer 6 to 9.3mV. Since the reference voltage of a comparator 7 is set to be 9.0mV, an output signal is delivered from a time point t1 to make an oscillator 8 oscillate, whereby the 1st timer circuit 9 outputs a control signal Sh to turn a switch circuit SW on and further to make the heaer 2 active. When there is any dew condensation on the surface of the humidity sensor 1, the turning-on of the power source of the humidity detector makes the voltage of the humidity detection signal Sr exceed the reference voltage of 9.0mV since the resistance value is turned small owing to the dew condensation. Accordingly, the heater is made active as mentioned in the above and thereby the dew condensing on the surface of the humidity sensor 1 is dried in a short time.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14813379A JPS5670449A (en) | 1979-11-15 | 1979-11-15 | Humidity sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14813379A JPS5670449A (en) | 1979-11-15 | 1979-11-15 | Humidity sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5670449A true JPS5670449A (en) | 1981-06-12 |
Family
ID=15445995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14813379A Pending JPS5670449A (en) | 1979-11-15 | 1979-11-15 | Humidity sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5670449A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0594215A1 (en) * | 1992-10-23 | 1994-04-27 | RICOH SEIKI COMPANY, Ltd. | Drive control apparatus for microsensor |
US6641303B2 (en) * | 2001-08-31 | 2003-11-04 | Honda Giken Kogyo Kabushiki Kaisha | Temperature control system for humidity sensor |
EP2261572A1 (en) * | 2009-06-11 | 2010-12-15 | Kjærulf Pedersen A/S | Humidity sensoring system for storage rooms |
US7900374B2 (en) * | 2004-08-18 | 2011-03-08 | Lg Electronics Inc. | Apparatus for automatically drying and method for controlling the same |
CN103207213A (en) * | 2013-03-21 | 2013-07-17 | 王競逸 | Moisture condensation detecting device |
-
1979
- 1979-11-15 JP JP14813379A patent/JPS5670449A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0594215A1 (en) * | 1992-10-23 | 1994-04-27 | RICOH SEIKI COMPANY, Ltd. | Drive control apparatus for microsensor |
US6641303B2 (en) * | 2001-08-31 | 2003-11-04 | Honda Giken Kogyo Kabushiki Kaisha | Temperature control system for humidity sensor |
US7900374B2 (en) * | 2004-08-18 | 2011-03-08 | Lg Electronics Inc. | Apparatus for automatically drying and method for controlling the same |
EP2261572A1 (en) * | 2009-06-11 | 2010-12-15 | Kjærulf Pedersen A/S | Humidity sensoring system for storage rooms |
CN103207213A (en) * | 2013-03-21 | 2013-07-17 | 王競逸 | Moisture condensation detecting device |
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