JPS6425037A - Optical humidity measuring device - Google Patents
Optical humidity measuring deviceInfo
- Publication number
- JPS6425037A JPS6425037A JP18075287A JP18075287A JPS6425037A JP S6425037 A JPS6425037 A JP S6425037A JP 18075287 A JP18075287 A JP 18075287A JP 18075287 A JP18075287 A JP 18075287A JP S6425037 A JPS6425037 A JP S6425037A
- Authority
- JP
- Japan
- Prior art keywords
- light
- measuring
- attenuated
- gas
- reflected
- 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
- 230000003287 optical effect Effects 0.000 title abstract 2
- 230000002238 attenuated effect Effects 0.000 abstract 8
- 230000003534 oscillatory effect Effects 0.000 abstract 4
- 238000001514 detection method Methods 0.000 abstract 2
- 230000007774 longterm Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3554—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for determining moisture content
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE:To obtain a correct measuring value for a long term, by separating the reflected light which is attenuated in a measuring gas and the reflected light of an oscillatory wave which is attenuated in a measuring device after detection thereof, while enabling the obtained data operable and enabling the automatic correction of the measured value. CONSTITUTION:Infrared rays from a light source 2 are, through a condensing lens 3 and optical filters 6 and 7, separated into rays of reference light 8 and rays of measuring light 9 and projected into a measuring gas 11 by a reflecting mirror 10. The measuring light 9 is, after being attenuated within the gas 11, whereas the reference light 8 is, without being attenuated so much, both reflected by a reflecting mirror 13 and gathered by a reflecting mirror 14 and received by a detector 17. Meanwhile, a part of the reference light 8 and the measuring light 9 are reflected by an oscillating reflecting mirror 15, thereby forming oscillatory waves of the reference light 8 and the measuring light 9. Then, the respective reflected lights of the reference light 8 and the measuring light 9 which are attenuated by passing through the gas 11, and the reflected light of the oscillatory waves attenuated in the device are detected by the same detector 17 all together. As a result of this setup, it becomes possible to measure and calculate the humidity of the gas after separating the reflected lights attenuated in the gas 11 and the reflected light of oscillatory waves attenuated in the device after detection thereof, and to automatically correct the measuring value of the gas humidity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18075287A JPS6425037A (en) | 1987-07-20 | 1987-07-20 | Optical humidity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18075287A JPS6425037A (en) | 1987-07-20 | 1987-07-20 | Optical humidity measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6425037A true JPS6425037A (en) | 1989-01-27 |
Family
ID=16088697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18075287A Pending JPS6425037A (en) | 1987-07-20 | 1987-07-20 | Optical humidity measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6425037A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235421A (en) * | 2000-12-27 | 2001-08-31 | Idec Izumi Corp | Photoelectric switch |
-
1987
- 1987-07-20 JP JP18075287A patent/JPS6425037A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001235421A (en) * | 2000-12-27 | 2001-08-31 | Idec Izumi Corp | Photoelectric switch |
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