CN2426148Y - Infrared sulfur dioxide analysis instrument - Google Patents
Infrared sulfur dioxide analysis instrument Download PDFInfo
- Publication number
- CN2426148Y CN2426148Y CN 00238371 CN00238371U CN2426148Y CN 2426148 Y CN2426148 Y CN 2426148Y CN 00238371 CN00238371 CN 00238371 CN 00238371 U CN00238371 U CN 00238371U CN 2426148 Y CN2426148 Y CN 2426148Y
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- infrared
- sulfur dioxide
- air chamber
- spectroscope
- dioxide gas
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Abstract
The utility model relates to a gas analyzing apparatus utilizing infrared technology for detecting the content of sulfur dioxide in gas in environmental monitoring. The infrared sulfur dioxide gas analyzer comprises an infrared source which is arranged at one end of a measuring gas chamber, the measuring gas chamber in a hollow cylinder, an optical system, and a single chip computer which is connected with the infrared source 5, a sucking pump 26 and an infrared detector, wherein, the measuring gas chamber is provided with an intake charge mouth which is connected with gas to be measured and a gassing mouth which is connected with the sucking pump. The utility model provides a sulfur dioxide analyzer with high precision, long life time and convenient use, and the sulfur dioxide analyzer not only can be used for sampling analysis in short time, but also can be used for long-term on-line detection.
Description
The utility model relates to the gas analysis instrument that utilizes infrared technique that content of sulfur dioxide in the gas is detected in a kind of environmental monitoring.
At present, the sulfur dioxide gas analyser is used comparatively general in environmental monitoring.This instrument kind is a lot, and dividing with regard to its principle has constant potentiometric electrolysis, iodimetric titration, electrical conductivity method.The long-term result that uses shows: there is weak point in this quasi-instrument.For example: the electrochemical sensor life-span of using in the constant potentiometric electrolysis is the time limit one year, is generally 2 years, no matter whether use and must change, and this sensor is an external product, costs an arm and a leg.Electrical conductivity method, iodimetric titration must be prepared necessary separately electric drain, iodine titer before use, so use inconvenient.
The purpose of this utility model is to overcome existing technical disadvantages, provides a kind of precision height, life-span long, easy to use, not only can be used as the short time sampling analysis, also can make the flue gas analyser of long-term online detection.
Realize that the above-mentioned purpose main technical schemes is: this infrared sulfur dioxide gas analyser includes :-infrared light supply 5, and this light source can send infrared pulse light under single-chip microcomputer 25 controls,
It places an end of measuring air chamber 10;-measure air chamber 10, this air chamber is the hollow form right cylinder, is provided with admission piece 23 and goes out
Valve 24, aspiration pump 26 links to each other with outlet nozzle, and admission piece links to each other with gas to be measured;-optical system is arranged at and measures air chamber 10 two ends and with described infrared pulse
Light becomes the lens combination of parallel beam; Spectroscope 16 that can only transmission 7.3 ± 0.1 mum wavelength infrared lights, this spectroscope places the other end of measuring air chamber 10, the optical filter 17 that only allows 7.3 ± 0.1 mum wavelength infrared lights to pass through places after the spectroscope 16, and 7.3 ± 0.1 mum wavelength infrared lights that pass through through optical filter 17 are transformed into electric signal input single-chip microcomputer through infrared eye 18; Its commplementary wave length infrared light through spectroscope 16 reflections is transformed into electric signal input single-chip microcomputer through infrared eye 19;-single-chip microcomputer, it links to each other with infrared light supply 5, aspiration pump 26, infrared eye.
The utility model mainly is made up of optic probe and Single Chip Microcomputer (SCM) system, it is characterized in that: optic probe is made up of infrared light supply 5, measurement air chamber 10, spectroscope 6, catoptron 20, optical filter 17 and infrared eye 18,19.This infrared light supply 5 is the outer pulsed lights of a kind of pact.Measure air chamber 10 and adopt the ultralumin polishing to make the hollow form Cylinder, inner-wall spraying black gathers the own ethene of tetrafluoro.Spectroscope 16 is a kind of special, only allows the light signal transmission optics eyeglass of 7.3 ± 0.1 mum wavelengths.The light signal reflection of its commplementary wave length.20 pairs of all wavelengths signals of catoptron reflect fully, optical filter 17 is a kind of narrow band pass filters, only allows 7.3 ± 0.1 μ m light signals to pass through, and infrared eye 18,19 is a high-performance thermopile detector, to the light signal uniform response of 1-12 μ m, and change it into electric signal.
Compared with prior art, key of the present utility model is: the principle according to there is characteristic absorption peak at sulfur dioxide gas 7.3 ± 0.1 μ m places in the infrared ray wave band, designed above-mentioned optic probe.
In this optic probe, infrared pulse light source with the electronics modulation substitutes the infrared light supply that a present normally used machinery is cut light, owing to there is not movable part, optic probe has obtained increasing substantially serviceable life, owing to adopted the modulation of source technology, other jamming light source (for example natural light) are eliminated fully to the influence of measuring-signal.
In this optic probe, designed an air chamber, and gas infrared absorption measurement method all is to adopt to measure air chamber and two air chambers of reference air chamber at present.Owing to lacked an air chamber, it is simple that its structure becomes.
In this optic probe, adopted the beam splitting system of forming by catoptron and spectroscope.Will be by a branch of photolysis measuring beam and the reference beam behind the measurement air chamber.Thereby the reference that can realize measuring-signal is handled, and has eliminated the infrared light supply radiation power and has changed the measuring error that causes.
Owing to adopted above-mentioned technology, the utility model is simple in structure, long service life, and the accuracy of detection height can be used for online detection.
Below in conjunction with accompanying drawing to embodiment of the present utility model with further describing.
Fig. 1 is a system chart of the present utility model.
Fig. 2 is optic probe figure of the present utility model.
Number in the figure is as follows:
1. optic probe pedestal 10. is measured institute's chamber 19. infrared eyes
2. clamping piece 11. set nuts 20. reflective mirrors
3. plano lens 12. objective holders 21. optic probe pedestals
4. object lens 13. object lens 22. clamping pieces
5. infrared light supply 14. packing rings 23. admission pieces
6. objective holder 15. plano lens 24. outlet nozzles
7. packing ring 16. spectroscopes 25. single-chip microcomputers
8. edge joint tube 17. optical filters 26. aspiration pumps
9. set nut 18. infrared eyes
As shown in Figure 1, the utility model is partly formed by two.A part is an optic probe, and its effect is that gas concentration signal to be measured is converted to electric signal.A part is single-chip microcomputer and aspiration pump, and aspiration pump makes gas to be measured continuously by measuring air chamber.Single-chip microcomputer is handled the optic probe output signal and is drawn the concentration of SO 2 gas value.Because single-chip microcomputer belongs to technology general knowledge, its physical circuit design is conspicuous for those skilled in the art, so this paper does not launch explanation to single-chip microcomputer.
As shown in Figure 2, infrared sulfur dioxide gas analyser according to claim 1, it is characterized in that: described lens combination is two groups, places respectively in the optic probe pedestal 1,21 of measuring air chamber 10 two ends, and every group of lens combination is made up of object lens 4,13 and plano lens 3,15.Object lens 4, plano lens 3, be fixed in the objective holder 6, have packing ring 7, object lens 6 to link to each other with optic probe seat 1 between object lens 4 and the plano lens 3 by clamping piece 2, set nut 9.Equally, object lens 13 and plano lens 15 are fixed in the objective holder 12, between object lens 13 and the plano lens 15 packing ring 13 are arranged, and the saturating seat 12 of thing connects as one with optic probe pedestal 21 by clamping piece 22, set nut 11.
As shown in Figure 1 and Figure 2, during work, the infrared light that infrared light supply 5 sends is modulated into pulsed light by single-chip microcomputer 25, and this light beam forms parallel beam by plano lens 3 object lens 4 and enters air chamber 10.Aspiration pump 26 links to each other with outlet nozzle 24.Entering mouth 23 links to each other with gas to be measured.Aspiration pump 26 rotates during instrument work, and gas to be measured is continuously by air chamber 10.In air chamber 10, infrared beam is injected gas to be measured, and sulphuric dioxide composition 7.3 ± 0.1 μ m infrared lights in the gas to be measured have absorption, and absorption is strong and weak relevant with sulfur dioxide concentration in the gas.Parallel beam after the absorption is injected spectroscope 16 by plano lens 15, a branch of light of object lens 13 post-concentrations, spectroscope 16 allows to absorb back 7.3 ± 0.1 mum wavelength transmittance and forms measuring beam, all the other are reflected to form reference beam by spectroscope 16, catoptron that reference beam is provided with by catoptron below 20 all the other to infrared eye 19, infrared eye 19 is that the electric signal of corresponding size forms reference signal with the conversion of signals of reference beam.
Measuring beam is by behind the narrow band pass filter 17, and irradiation infrared eye 18, infrared eye 18 are converted to the light signal of measuring beam the electric signal formation measuring-signal of corresponding size.Measuring-signal and reference signal are sent into Single Chip Microcomputer (SCM) system 25 Single Chip Microcomputer (SCM) system 25 with after this signal amplification, demodulation, carrying out data processing, demonstrate sulfur dioxide concentration.
Claims (8)
1, a kind of infrared sulfur dioxide gas analyser, it is characterized in that: it includes :-infrared light supply (5), this light source can send infrared pulse under single-chip microcomputer (25) control
Light, it places an end of measuring air chamber (10);-measure air chamber (10), this air chamber is the hollow form right cylinder, be provided with admission piece (23) and
Outlet nozzle (24), aspiration pump (26) links to each other with outlet nozzle, admission piece and gas to be measured
Body links to each other;-optical system is arranged at and measures air chamber (10) two ends and with described infrared pulse
Light becomes the lens combination of parallel beam; Can only transmission 7.3 ± 0.1 mum wavelength infrared lights
Spectroscope (16), this spectroscope places the other end of measuring air chamber (10), only
The optical filter (17) that allows 7.3 ± 0.1 mum wavelength infrared lights to pass through places spectroscope
(16) afterwards, 7.3 ± 0.1 mum wavelength infrared lights that pass through through optical filter (17)
Be transformed into electric signal input single-chip microcomputer through infrared eye (18); Through spectroscope (16)
It is defeated that its commplementary wave length infrared light of reflection is transformed into electric signal through infrared eye (19)
Go into single-chip microcomputer;-single-chip microcomputer, it links to each other with infrared light supply (5), aspiration pump (26), infrared eye.
2, infrared sulfur dioxide gas analyser according to claim 1, it is characterized in that: described lens combination is two groups, place respectively in the optic probe pedestal (1) of measuring air chamber (10) two ends, (21), every group of lens combination is made up of object lens (4), (13) and plano lens (3), (15).
3, infrared sulfur dioxide gas analyser according to claim 1 and 2, it is characterized in that: the below of described spectroscope (16) is provided with a catoptron (20).
4, infrared sulfur dioxide gas analyser according to claim 1 and 2 is characterized in that: described measurement air chamber (10) adopts the ultralumin polishing to make, and its inner-wall spraying black gathers the own ethene of tetrafluoro.
5, infrared sulfur dioxide gas analyser according to claim 1 and 2 is characterized in that: described infrared eye (18) (19) is the high-performance thermopile detector to the uniform response of 1-12 mum wavelength infrared light.
6, infrared sulfur dioxide gas analyser according to claim 1 and 2 is characterized in that: described spectroscope (16) and optical filter (17) only allow 7.3 mum wavelength infrared lights to pass through.
7, infrared sulfur dioxide gas analyser according to claim 3 is characterized in that: described spectroscope (16) and optical filter (17) only allow 7.3 mum wavelength infrared lights to pass through.
8, according to claim 1,2 or 7 described infrared sulfur dioxide gas analysers, it is characterized in that: described optical filter (17) is a narrow band pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00238371 CN2426148Y (en) | 2000-07-04 | 2000-07-04 | Infrared sulfur dioxide analysis instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00238371 CN2426148Y (en) | 2000-07-04 | 2000-07-04 | Infrared sulfur dioxide analysis instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2426148Y true CN2426148Y (en) | 2001-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00238371 Expired - Lifetime CN2426148Y (en) | 2000-07-04 | 2000-07-04 | Infrared sulfur dioxide analysis instrument |
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| CN (1) | CN2426148Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310022C (en) * | 2001-10-26 | 2007-04-11 | 北京航天益来电子科技有限公司 | Gaseous pollutant micro-quantity extraction field analysis method and equipment |
| CN100356162C (en) * | 2004-07-07 | 2007-12-19 | 深圳迈瑞生物医疗电子股份有限公司 | Method and apparatus for measuring gas concentration based on light source modulation |
| CN102175608A (en) * | 2011-01-05 | 2011-09-07 | 上海德凯仪器有限公司 | Light path absorption pool device for infrared gas analysis |
| CN101498665B (en) * | 2009-02-27 | 2011-09-21 | 哈尔滨工业大学 | Sulphur dioxide gas concentration detection apparatus based on associated spectrum technology |
| CN102353633A (en) * | 2011-06-15 | 2012-02-15 | 西安毅达信息系统有限公司 | Flue gas content laser on-line detection method and system |
| CN103528970A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Light path system in portable near-infrared analyzer |
| CN104089884A (en) * | 2013-12-18 | 2014-10-08 | 力合科技（湖南）股份有限公司 | Optical front-end structure of gas analyzer |
| CN104502541A (en) * | 2014-12-30 | 2015-04-08 | 力合科技（湖南）股份有限公司 | Gas chamber device for gas analyzer |
| CN105403530A (en) * | 2015-10-26 | 2016-03-16 | 长沙开元仪器股份有限公司 | Gas concentration detection apparatus and method thereof |
| CN105486653A (en) * | 2015-12-01 | 2016-04-13 | 昆明勤瑞科技有限公司 | Sulfur dioxide infrared detection device and method |
| CN106769955A (en) * | 2015-11-25 | 2017-05-31 | 优胜光分联营公司 | For the air chamber of absorption spectrometry |
| CN107238572A (en) * | 2017-08-01 | 2017-10-10 | 北京怡孚和融科技有限公司 | A kind of integrated air content detection system and circuit arrangement |
| CN107810395A (en) * | 2015-05-22 | 2018-03-16 | 瑞典爱尔诺红外有限公司 | Infrared imaging detector |
| CN109115716A (en) * | 2018-07-12 | 2019-01-01 | 镇江市爱威尔电子有限公司 | A kind of Multifunction infrared gas sensor |
| CN109959625A (en) * | 2019-03-21 | 2019-07-02 | 成都凯天电子股份有限公司 | On-line analysis detects SO2The method of content |
-
2000
- 2000-07-04 CN CN 00238371 patent/CN2426148Y/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1310022C (en) * | 2001-10-26 | 2007-04-11 | 北京航天益来电子科技有限公司 | Gaseous pollutant micro-quantity extraction field analysis method and equipment |
| CN100356162C (en) * | 2004-07-07 | 2007-12-19 | 深圳迈瑞生物医疗电子股份有限公司 | Method and apparatus for measuring gas concentration based on light source modulation |
| CN101498665B (en) * | 2009-02-27 | 2011-09-21 | 哈尔滨工业大学 | Sulphur dioxide gas concentration detection apparatus based on associated spectrum technology |
| CN102175608A (en) * | 2011-01-05 | 2011-09-07 | 上海德凯仪器有限公司 | Light path absorption pool device for infrared gas analysis |
| CN102353633A (en) * | 2011-06-15 | 2012-02-15 | 西安毅达信息系统有限公司 | Flue gas content laser on-line detection method and system |
| CN102353633B (en) * | 2011-06-15 | 2013-09-11 | 西安毅达信息系统有限公司 | Flue gas content laser on-line detection method and system |
| CN103528970A (en) * | 2013-10-22 | 2014-01-22 | 长春长光思博光谱技术有限公司 | Light path system in portable near-infrared analyzer |
| CN104089884A (en) * | 2013-12-18 | 2014-10-08 | 力合科技（湖南）股份有限公司 | Optical front-end structure of gas analyzer |
| CN104502541A (en) * | 2014-12-30 | 2015-04-08 | 力合科技（湖南）股份有限公司 | Gas chamber device for gas analyzer |
| CN107810395A (en) * | 2015-05-22 | 2018-03-16 | 瑞典爱尔诺红外有限公司 | Infrared imaging detector |
| CN107810395B (en) * | 2015-05-22 | 2020-05-05 | 瑞典爱尔诺红外有限公司 | Infrared imaging detector |
| CN105403530A (en) * | 2015-10-26 | 2016-03-16 | 长沙开元仪器股份有限公司 | Gas concentration detection apparatus and method thereof |
| CN106769955A (en) * | 2015-11-25 | 2017-05-31 | 优胜光分联营公司 | For the air chamber of absorption spectrometry |
| CN105486653A (en) * | 2015-12-01 | 2016-04-13 | 昆明勤瑞科技有限公司 | Sulfur dioxide infrared detection device and method |
| CN107238572A (en) * | 2017-08-01 | 2017-10-10 | 北京怡孚和融科技有限公司 | A kind of integrated air content detection system and circuit arrangement |
| CN109115716A (en) * | 2018-07-12 | 2019-01-01 | 镇江市爱威尔电子有限公司 | A kind of Multifunction infrared gas sensor |
| CN109959625A (en) * | 2019-03-21 | 2019-07-02 | 成都凯天电子股份有限公司 | On-line analysis detects SO2The method of content |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20010404 |
|
| DD01 | Delivery of document by public notice |
Addressee: Tianhong Intelligent Instrument and Meter Co., Ltd., Beijing Document name: Notification of Expiration of Patent Right Duration |