JPS54111397A - Hygrometer - Google Patents
HygrometerInfo
- Publication number
- JPS54111397A JPS54111397A JP1893678A JP1893678A JPS54111397A JP S54111397 A JPS54111397 A JP S54111397A JP 1893678 A JP1893678 A JP 1893678A JP 1893678 A JP1893678 A JP 1893678A JP S54111397 A JPS54111397 A JP S54111397A
- Authority
- JP
- Japan
- Prior art keywords
- humidity
- outputs
- operational amplifier
- output
- resonance
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
PURPOSE: To measure humidity by the output of an operational amplifier by letting the outputs of two sets of resonance circuits be differential inputs to the operational amplifier.
CONSTITUTION: The outputs of first, second resonance circuits 3, 4 are rectified respectively by rectifying circuit 9, 10 and are applied as differential inputs to an operational amplifier 11 and therefore the outputs corresponding to the differences in the outputs of the respective resonance circuits 3, 4 appear in the output side of the operational amplifier 11. Since the capacitor 6 constituting the resonance circuit 3 is so constituted that its capacity value changes with humidity, the output of the first resonance circuit 3 changes considerably with humidity. Hence, the output differences of the first, second resonance circuit 3,4 change with humidity and this turns out that a meter 13 indicates the value corresponding to humidity.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1893678A JPS54111397A (en) | 1978-02-20 | 1978-02-20 | Hygrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1893678A JPS54111397A (en) | 1978-02-20 | 1978-02-20 | Hygrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54111397A true JPS54111397A (en) | 1979-08-31 |
Family
ID=11985521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1893678A Pending JPS54111397A (en) | 1978-02-20 | 1978-02-20 | Hygrometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54111397A (en) |
-
1978
- 1978-02-20 JP JP1893678A patent/JPS54111397A/en active Pending
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