JPS5664646A - Gas concentration detection method - Google Patents
Gas concentration detection methodInfo
- Publication number
- JPS5664646A JPS5664646A JP14232979A JP14232979A JPS5664646A JP S5664646 A JPS5664646 A JP S5664646A JP 14232979 A JP14232979 A JP 14232979A JP 14232979 A JP14232979 A JP 14232979A JP S5664646 A JPS5664646 A JP S5664646A
- Authority
- JP
- Japan
- Prior art keywords
- laser light
- gas
- optical
- microcomputer
- gas concentration
- 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
- 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
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (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 enable an accurate detection of gas concentration as well as to reduce a calibration time of gas concentration by a method wherein a standard cell and an optical shutter are installed and an optical signal passing through the cell is compared with an electronic signal based on the optical signal passing through a gas space to be detected. CONSTITUTION:A laser light from an infrared laser 1 passes through each optical system passing through beam splitters B1, B2 via the main optical route which opens a shutter S3 and closed S1, S2 and is ejected into the atmospheric air and then, it is reflected by a reflector 7 to return to a system 20. A return laser light passes through the beam splitters B3, B4 and reaches an infrared ray detector 12 and it passes through an A/D converter 17 and is entered in a microcomputer 18, thus, the relative detection gas concentration of pollution gas in the atmospheric air is stored. At the next timing, control closes shutter S3, S1 and opens S2, and laser light is lead to an auxiliary optical route of a standard gas cell 22 and an absorption power and an absolute concentration are stored in the microcomputer 18. In this way, calibration points are obtained from the absorption power and the known concentration of a laser light passing through the standard cells 22, 23 and calibration estimation is performed through the microcomputer 18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14232979A JPS5664646A (en) | 1979-10-31 | 1979-10-31 | Gas concentration detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14232979A JPS5664646A (en) | 1979-10-31 | 1979-10-31 | Gas concentration detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5664646A true JPS5664646A (en) | 1981-06-01 |
Family
ID=15312808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14232979A Pending JPS5664646A (en) | 1979-10-31 | 1979-10-31 | Gas concentration detection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5664646A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018339A (en) * | 2016-07-08 | 2016-10-12 | 山东微感光电子有限公司 | Self-adaption reflection-type infrared laser industrial dangerous leaking gas monitoring device |
| CN108287147A (en) * | 2018-04-27 | 2018-07-17 | 贵州电网有限责任公司 | A kind of device and detection method of detection sulfur hexafluoride gas decomposition product |
-
1979
- 1979-10-31 JP JP14232979A patent/JPS5664646A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018339A (en) * | 2016-07-08 | 2016-10-12 | 山东微感光电子有限公司 | Self-adaption reflection-type infrared laser industrial dangerous leaking gas monitoring device |
| CN108287147A (en) * | 2018-04-27 | 2018-07-17 | 贵州电网有限责任公司 | A kind of device and detection method of detection sulfur hexafluoride gas decomposition product |
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