CN202583062U - Measurement system provided with optical fibre structure and adopting differential optical absorption spectroscopy for pollution gas - Google Patents
Measurement system provided with optical fibre structure and adopting differential optical absorption spectroscopy for pollution gas Download PDFInfo
- Publication number
- CN202583062U CN202583062U CN201220231268.2U CN201220231268U CN202583062U CN 202583062 U CN202583062 U CN 202583062U CN 201220231268 U CN201220231268 U CN 201220231268U CN 202583062 U CN202583062 U CN 202583062U
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- optical fiber
- light beam
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- photoswitch
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 107
- 238000005259 measurement Methods 0.000 title abstract description 5
- 238000001658 differential optical absorption spectrophotometry Methods 0.000 title abstract 2
- 238000001228 spectrum Methods 0.000 claims abstract description 27
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 17
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims description 24
- 238000000862 absorption spectrum Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 abstract 9
- 239000007789 gas Substances 0.000 description 19
- 230000000694 effects Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 150000003736 xenon Chemical class 0.000 description 1
Classifications
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- 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
-
- 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
- G01N2021/1793—Remote sensing
- G01N2021/1795—Atmospheric mapping of gases
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- 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
The utility model provides a measurement system provided with an optical fibre structure and adopting differential optical absorption spectroscopy for a pollution gas, which is characterized in that an xenon lamp light source is arranged in a lamp holder, the light beams emitted by the xenon lamp light source are coupled to the transmitting optical fibres of the lamp holder, the first optical fibre of the transmitting optical fibres is connected with a first optical switch, and the second optical fibre thereof is connected with a transmitting/receiving telescope; a second light beam penetrates through the optical switch and then is used as a background spectrum and enters in receiving optical fibres, a first light beam is reflected by the plane mirror of the transmitting/receiving telescope and then is transmitted and reflected via a corner reflector and then is received by the transmitting/receiving telescope and coupled to the receiving optical fibres; the receiving optical fibres penetrate through the second optical switch and a sample box and then are connected with a spectrograph, the first light beam and the second light beam are coupled by the receiving optical fibres to form a third light beam, the third light beam is received by the spectrograph, and the spectrum of the third light beam is monitored by the spectrograph; and a data processing system obtains the content information of the pollution gas according to the monitored result. The system is easy to disassemble and assembly, compact in structure, and high in spectrum utilization rate.
Description
Technical field
The utility model relates to a kind of dusty gas monitor, specifically is meant optical fiber structure dusty gas difference absorption spectrum measuring system.
Background technology
Develop rapidly along with socioeconomic, natural process especially a large amount of dusty gass of mankind's activity discharging has got into the air sphere that people depend on for existence, the serious threat ecosystem and human health.The all gases molecule had different character to absorb at different-waveband to light when difference absorption spectrum technology (DOAS) utilized light in atmosphere, to transmit, and realized trace gas in the atmosphere is accurately measured.It is wide, highly sensitive to have measurement range, and the advantage of the continuous on-line monitoring of noncontact is widely used in trace gas monitoring and pollution source on-line monitoring field.
In the prior art, DOAS system architecture commonly used is comparatively complicated, and light is repeatedly turned back, and blocked by minute surface, and the spectrum utilization factor is not high.Need use mechanical shutter during calibration.
The utility model content
The utility model provides a kind of optical fiber structure dusty gas difference absorption spectrum measuring system, is easy to dismounting, compact conformation, and the spectrum utilization factor is high.
To achieve these goals, the utility model provides following technical scheme:
A kind of optical fiber structure dusty gas difference absorption spectrum measuring system, it comprises:
Xenon source, transmitting-receiving telescope, corner reflector, spectrometer, data handling system, launching fiber, reception optical fiber, first photoswitch, second photoswitch and sample box, wherein:
Said xenon source places lamp socket; The launching fiber port is connected to lamp socket light-emitting window place; The light beam that light source sent is coupled to said launching fiber; Said launching fiber is divided at least: the first bundle optical fiber and the second bundle optical fiber, and the said first bundle optical fiber connects said first photoswitch, and the said second bundle optical fiber connects said transmitting-receiving telescope;
The light beam that sends through the said first bundle optical fiber is second light beam, and the light beam that sends of the said second bundle optical fiber of process is first light beam;
Second light beam gets into reception optical fiber as background spectrum after passing photoswitch, and first light beam is through launching after the flat mirror reflects of said transmitting-receiving telescope, after the corner reflector reflection, receiving and be coupled to said reception optical fiber by said transmitting-receiving telescope again;
Said reception optical fiber links to each other with spectrometer after passing second photoswitch and sample box; Said reception optical fiber forms the 3rd light beam with said first light beam and second light beam back that is coupled; Said the 3rd light beam is received by said spectrometer, and said spectrometer is monitored the spectrum of said the 3rd light beam;
Said data handling system obtains dusty gas content information according to the result of said monitoring.
Preferably, said transmitting-receiving telescope comprises level crossing and ellipsoidal mirror, and said level crossing and ellipsoidal mirror are structure as a whole, and is connected with the telescope edge and is fixed in the central shaft position through support.Wherein the central shaft angle of the plane of level crossing and said transmitting-receiving telescope is 45 °, and the central shaft of ellipsoidal mirror and telescopical central shaft angle are 0 °.
Preferably, said launching fiber is divided into the first bundle optical fiber and the second bundle optical fiber, and the splitting ratio of the said first bundle optical fiber and the second bundle optical fiber is 1:9, and the common port of said launching fiber links to each other with xenon source.
Preferably; Said reception optical fiber is divided into: three beams optical fiber and the 4th bundle optical fiber; The splitting ratio of said three beams optical fiber and the 4th bundle optical fiber is 1:1, and the three beams optical fiber of said reception optical fiber passes sample box and is connected said transmitting-receiving telescope with second photoswitch; The 4th bundle optical fiber of said reception optical fiber connects said first photoswitch, and said the 4th bundle optical fiber receives the background spectrum that imports into through said launching fiber, and said reception optical fiber common port links to each other with spectrometer.
Preferably, said sample box injects sample gas when calibration.
Through implementing above technical scheme, have following technique effect: the optical fiber structure dusty gas difference absorption spectrum measuring system that the utility model provides, its optical fiber connection is easy to dismounting, compact conformation.Photoswitch control, calibration need not mechanical shutter, and light beam is directly emission after primary event, has avoided effectively that minute surface blocks the loss that causes in the DOAS of the prior art system beam Propagation process, thereby has improved the spectrum utilization factor.
Description of drawings
The structure principle chart of the optical fiber structure dusty gas difference absorption spectrum measuring system that Fig. 1 provides for the utility model.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment provides a kind of optical fiber structure dusty gas difference absorption spectrum measuring system; As shown in Figure 1; It comprises xenon source 11, transmitting-receiving telescope, corner reflector 24, spectrometer 41, data handling system 51, and this optical fiber structure dusty gas difference absorption spectrum measuring system also comprises launching fiber 31, receive optical fiber 32, first photoswitch 33, second photoswitch 34 and sample box 35.Xenon source 11 in the said spectral measurement system places lamp socket; The port of launching fiber is connected to lamp socket light-emitting window place; The light beam that light source sent is coupled to launching fiber 31; Launching fiber 31 is divided at least: the first bundle optical fiber and the second bundle optical fiber, and the said first bundle optical fiber connects said first photoswitch 33, and the said second bundle optical fiber connects said transmitting-receiving telescope;
The light beam that this xenon source 11 is sent is divided into two parts by this first bundle optical fiber and the second bundle optical fiber; Wherein: the light beam that emits through the second bundle optical fiber is first light beam; This first light beam imports the light inlet 21 that receives transmitter-telescope; The light beam that emits through the first bundle optical fiber is second light beam; This second light beam passes first photoswitch, 33 backs and gets into reception optical fiber 32 as background spectrum; Import in the light inlet 21 of said transmitting-receiving telescope first light beam through launch after telescopical level crossing 22 reflections, again after should telescopical corner reflector 24 reflections, receive optical fiber 32, the said telescope of reception optical fiber 32 connections through receiving and be coupled to by telescopical ellipsoidal mirror 25 again behind the telescopical section catoptron 23 again; Reception optical fiber 32 passes second photoswitch 34 and links to each other with spectrometer 41 with sample box 35 backs; Said reception optical fiber 32 forms the 3rd light beam with said first light beam and second light beam back that is coupled, and said the 3rd light beam is received by said spectrometer 41, and the spectrum of 41 pairs of said the 3rd light beams of said spectrometer is monitored; After spectrometer 41 was accomplished the spectrum monitoring of said the 3rd light beam, said data handling system 51 obtained dusty gas content information according to the result of said monitoring.Said data handling system 51 connects said spectrometer 41.
In the above-described embodiments, more concrete, said telescopical level crossing 22 is structure as a whole with ellipsoidal mirror 25, is connected with the telescope edge and is fixed in the central shaft position through support.Wherein the central shaft angle of the plane of level crossing 22 and telescope 23 is 45 °, and ellipsoidal mirror central shaft and telescope central shaft angle are 0 °.Telescopical level crossing of the prior art is the two parts that separate with ellipsoidal mirror, and level crossing is injected atmosphere after reflecting light to the parabolic minute surface of telescope.And in the embodiment of the utility model, light beam is directly injected atmosphere through this level crossing, makes level crossing and being integrated of ellipsoidal mirror, and simplified structure reduces intensity losses.
In the above-described embodiments, preferably, said launching fiber 31 is divided into the first bundle optical fiber and the second bundle optical fiber, and the splitting ratio of the said first bundle optical fiber and the second bundle optical fiber is 1:9, and the common port of said launching fiber 31 links to each other with xenon source 11.In other embodiments, the said first bundle optical fiber and the second bundle optical fiber also can be other splitting ratio.Two fens optical fiber splitting ratios are that 1:9 does not need very strong light because survey the lamp spectrum in the launching fiber, have certain beam split to get final product, and the segment beam intensity of entering telescope emission should be enough big, to guarantee the validity of measurement result.
In the above-described embodiments, preferably, said reception optical fiber 32 is one-to-two optical fiber; Comprise three light beams and the 4th bundle optical fiber; It is 1:1 that this three light beams and the 4th bundle optical fiber get splitting ratio, and the three beams optical fiber of said reception optical fiber 32 passes sample box 35 and is connected transmitting-receiving telescope with second photoswitch 34, and the 4th bundle optical fiber that receives optical fiber 32 connects first photoswitch 33; Receive the background spectrum that launching fiber 31 imports into, receive optical fiber 32 common ports and link to each other with spectrometer 41.Receive optical fiber 32 and can simplify device architecture for one-to-two optical fiber; Can simply and easily control the switching of background spectrum and measured spectra through photoswitch; And in the DOAS system that prior art provides; Realize the switching of this background spectrum and measured spectra, need to use mechanical shutter, or change device and light channel structure.Two parts of fiber beam splittings can be avoided the light intensity secondary loss than being 1:1 in the reception optical fiber.
In the above-described embodiments, preferably, said sample box 35 only injects sample gas when calibration.
Measure beginning, first photoswitch 33 is opened, and second photoswitch 34 is closed, xenon source 11 outgoing beams 1/10 through launching fiber 31, first photoswitch 33, receive optical fiber 32 and introduce spectrometers 41, obtain xenon lamp background spectrum.Xenon source 11 is closed, and first photoswitch 33 is closed, and second photoswitch 34 is opened, and obtains background spectra by spectrometer 41.Photoswitch 33 is closed; Second photoswitch 34 is opened, xenon source 11 outgoing beams 9/10 after telescope 21,22,23 and corner reflector 14 effects, the light beam that includes dusty gas absorption spectrum information is coupled into and receives optical fiber 32; And then lead-in light spectrometer 41 is accomplished spectral analysis; Combine lamp spectrum, background spectra at last, obtain dusty gas content information through data handling system 51, thereby accomplish whole measuring process.
The optical fiber structure dusty gas difference absorption spectrum measuring system that the foregoing description provides, the optical fiber connection is easy to dismounting, compact conformation.Photoswitch control, calibration need not mechanical shutter, need not to adjust hardware configuration when carrying out background spectra, lamp spectrometry and calibration, can control automatically through photoswitch.Light beam is directly emission after primary event, has avoided effectively that minute surface blocks the loss that causes in the DOAS of the prior art system beam Propagation process, thereby has improved the spectrum utilization factor.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (5)
1. an optical fiber structure dusty gas difference absorption spectrum measuring system is characterized in that, comprising:
Xenon source, transmitting-receiving telescope, corner reflector, spectrometer, data handling system, launching fiber, reception optical fiber, first photoswitch, second photoswitch and sample box, wherein:
Said xenon source places lamp socket; The launching fiber port is connected to lamp socket light-emitting window place; The light beam that xenon source sent is coupled to said launching fiber; Said launching fiber is divided at least: the first bundle optical fiber and the second bundle optical fiber, and the said first bundle optical fiber connects said first photoswitch, and the said second bundle optical fiber connects said transmitting-receiving telescope;
The light beam that sends through the said first bundle optical fiber is second light beam, and the light beam that sends of the said second bundle optical fiber of process is first light beam;
Second light beam gets into reception optical fiber as background spectrum after passing first photoswitch, and first light beam is through launching after the flat mirror reflects of said transmitting-receiving telescope, after the corner reflector reflection, receiving and be coupled to said reception optical fiber by said transmitting-receiving telescope again;
Said reception optical fiber links to each other with spectrometer after passing second photoswitch and sample box; Said reception optical fiber forms the 3rd light beam with said first light beam and second light beam back that is coupled; Said the 3rd light beam is received by said spectrometer, and said spectrometer is monitored the spectrum of said the 3rd light beam;
Said data handling system obtains dusty gas content information according to the result of said monitoring.
2. optical fiber structure dusty gas difference absorption spectrum measuring system according to claim 1; It is characterized in that; Said transmitting-receiving telescope comprises level crossing and ellipsoidal mirror, and said level crossing and ellipsoidal mirror are structure as a whole, and is connected with the telescope edge and is fixed in the central shaft position through support; Wherein the central shaft angle of the plane of level crossing and said transmitting-receiving telescope is 45 °, and the central shaft of ellipsoidal mirror and telescopical central shaft angle are 0 °.
3. optical fiber structure dusty gas difference absorption spectrum measuring system according to claim 1; It is characterized in that; Said launching fiber is divided into the first bundle optical fiber and the second bundle optical fiber; The splitting ratio of the said first bundle optical fiber and the second bundle optical fiber is 1:9, and the common port of said launching fiber links to each other with xenon source.
4. optical fiber structure dusty gas difference absorption spectrum measuring system according to claim 1 or claim 2; It is characterized in that; Said reception optical fiber is divided into: three beams optical fiber and the 4th bundle optical fiber; The splitting ratio of said three beams optical fiber and the 4th bundle optical fiber is 1:1, and the three beams optical fiber of said reception optical fiber passes sample box and is connected said transmitting-receiving telescope with second photoswitch; The 4th bundle optical fiber of said reception optical fiber connects said first photoswitch, and said the 4th bundle optical fiber receives the background spectrum that imports into through said launching fiber, and said reception optical fiber common port links to each other with spectrometer.
5. optical fiber structure dusty gas difference absorption spectrum measuring system according to claim 1 is characterized in that, said sample box injects sample gas when calibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220231268.2U CN202583062U (en) | 2012-05-22 | 2012-05-22 | Measurement system provided with optical fibre structure and adopting differential optical absorption spectroscopy for pollution gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220231268.2U CN202583062U (en) | 2012-05-22 | 2012-05-22 | Measurement system provided with optical fibre structure and adopting differential optical absorption spectroscopy for pollution gas |
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| CN202583062U true CN202583062U (en) | 2012-12-05 |
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| CN201220231268.2U Expired - Lifetime CN202583062U (en) | 2012-05-22 | 2012-05-22 | Measurement system provided with optical fibre structure and adopting differential optical absorption spectroscopy for pollution gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424369A (en) * | 2012-05-22 | 2013-12-04 | 杨少辰 | Pollution-gas differential optical absorption spectroscopy measurement system with optical fiber structure |
| CN103616332A (en) * | 2013-12-10 | 2014-03-05 | 山东大学 | Gas detection system for eliminating influence of residual to-be-detected gas in photoelectric device |
| CN112461783A (en) * | 2019-10-17 | 2021-03-09 | 山东金璋隆祥智能科技有限责任公司 | Light path switching technology of GSA near-infrared spectrometer |
-
2012
- 2012-05-22 CN CN201220231268.2U patent/CN202583062U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424369A (en) * | 2012-05-22 | 2013-12-04 | 杨少辰 | Pollution-gas differential optical absorption spectroscopy measurement system with optical fiber structure |
| CN103424369B (en) * | 2012-05-22 | 2016-08-17 | 深圳大舜激光技术有限公司 | A kind of optical fiber structure dusty gas difference absorption spectrum measures system |
| CN103616332A (en) * | 2013-12-10 | 2014-03-05 | 山东大学 | Gas detection system for eliminating influence of residual to-be-detected gas in photoelectric device |
| CN112461783A (en) * | 2019-10-17 | 2021-03-09 | 山东金璋隆祥智能科技有限责任公司 | Light path switching technology of GSA near-infrared spectrometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN DARSUN LASER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: YANG SHAOCHEN Effective date: 20150331 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20150331 Address after: Beike No. 1077 building, 518000 Guangdong city of Shenzhen province Nanshan District Nanhai Road, Room 308 Patentee after: Shenzhen Darsun Laser Technology Co., Ltd. Address before: Beike No. 1077 building, 518000 Guangdong city of Shenzhen province Nanshan District Nanhai Road, Room 308 Patentee before: Yang Shaochen |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20151013 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20121205 Effective date of abandoning: 20151013 |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |