CN104502278B - A kind of fiber gas sensor air chamber - Google Patents
A kind of fiber gas sensor air chamber Download PDFInfo
- Publication number
- CN104502278B CN104502278B CN201410765324.4A CN201410765324A CN104502278B CN 104502278 B CN104502278 B CN 104502278B CN 201410765324 A CN201410765324 A CN 201410765324A CN 104502278 B CN104502278 B CN 104502278B
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- Prior art keywords
- reflective mirror
- air chamber
- total reflective
- gas sensor
- light path
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- 239000000835 fiber Substances 0.000 title claims abstract description 31
- 239000013307 optical fiber Substances 0.000 claims description 19
- 230000007704 transition Effects 0.000 claims description 12
- 230000011514 reflex Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 11
- 239000007789 gas Substances 0.000 description 36
- 238000001514 detection method Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a kind of fiber gas sensor air chamber, the air chamber includes air chamber shell, total reflective mirror structure in air chamber shell, and the blow vent on air chamber case body, the total reflective mirror structure include input total reflective mirror, output total reflective mirror and at least one light path total reflective mirror；Incident laser is reflexed on the output total reflective mirror first through the input total reflective mirror reflection, then through at least one described light path total reflective mirror, is most exported afterwards through the output total reflective mirror reflection.The present invention makes laser multiple reflections in air chamber by designing total reflective mirror structure, realizes the long light path measurement of smaller size smaller air chamber, reduces chamber volume, saved cost.
Description
Technical field
The invention belongs to fiber gas sensor field, it is related to a kind of fiber gas sensor air chamber.
Background technology
In modern production, life, as the improvement of people's living standards, the mankind also get over to the requirement that ecological environment is purified
Come higher, therefore be particularly important for the real-time detection of the pernicious gas in air.Especially as coal and chemical industry etc. are led
Domain, is urgent problem to be solved to poisonous, pernicious gas monitoring and prediction in air.And fiber gas sensor is in this field
Application and research be vigorously developed.
The monitoring of environmental of fiber gas sensor can be open measurement or pumping detection, air chamber measurement light
The long precision of Cheng Yue is higher, but fiber gas sensor air chamber is based on a pair or several to optical fiber collimator combination in the prior art
Into when air chamber measurement light path is longer, the volume of required air chamber is big, and cost of manufacture is higher, and optical maser wavelength is limited.
The content of the invention
In consideration of it, the invention provides a kind of fiber gas sensor air chamber, it is therefore intended that reduce fiber gas sensor
The volume of air chamber, reduces cost.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of fiber gas sensor air chamber provided in an embodiment of the present invention, including air chamber shell, in air chamber shell
Total reflective mirror structure, and the blow vent on air chamber case body, the total reflective mirror structure includes input total reflective mirror, output
Total reflective mirror and at least one light path total reflective mirror；
Incident laser is first through the input total reflective mirror reflection, then reflexes to through at least one described light path total reflective mirror described defeated
Go out on total reflective mirror, most exported afterwards through the output total reflective mirror reflection.
Further, the total reflective mirror structure is multilayer total reflective mirror structure；Incident laser first inputs total reflective mirror through first layer
Reflection, then through first layer, at least one light path total reflective mirror is reflexed on first layer output total reflective mirror, and total reflective mirror is exported through first layer
Second layer input total reflective mirror is reflected to, is so successively reflected, is finally reflected and exported by the output total reflective mirror of last layer.
Further, the blow vent is located at one end of the air chamber shell, and the blow vent includes air inlet and outlet
Mouthful.
Further, the blow vent is located on air chamber wall.
Further, in addition to the nvironment transition screw socket contacted with environment to be measured positioned at described air chamber shell one end.
Further, in addition to optical fiber collimator and photodiode in air chamber shell.
Further, the main frame transition screw socket of the fixed host computer in addition to positioned at the air chamber shell other end.
Further, in addition to end optical fiber flange plate and SMA interfaces on the main frame transition screw socket；The Fiber Optic Sensor
Blue disk is connected by optical fiber with the optical fiber collimator, and the SMA interfaces are connected by wire with the photodiode.
Further, the end face placement at 45 ° of the input total reflective mirror and output total reflective mirror and the air chamber shell, described
At least one light path total reflective mirror is placed with air chamber axis parallel.
Further, the shape for the light path light path that the total reflective mirror structure is reflected to form includes unclosed polygon or many
Angle star.
Compared with prior art, the advantage of technical solution of the present invention is：
A kind of fiber gas sensor air chamber that the present invention is provided, by gas indoor design total reflective mirror structure, making laser
The multiple reflections in air chamber, realize the long light path measurement of smaller size smaller air chamber, reduce chamber volume, reduce cost.
Brief description of the drawings
The exemplary embodiment of the present invention will be described in detail by referring to accompanying drawing below, makes one of ordinary skill in the art
Become apparent from the above-mentioned and other feature and advantage of the present invention, accompanying drawing：
Fig. 1 is the structural representation for the fiber gas sensor air chamber that the embodiment of the present invention one is provided；
Fig. 2 is the structural representation for the fiber gas sensor air chamber that the embodiment of the present invention two is provided；
Fig. 3 is the structural representation for the fiber gas sensor air chamber that the embodiment of the present invention three is provided.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, hereinafter with reference to attached in the embodiment of the present invention
Figure, technical scheme is clearly and completely described by embodiment, it is clear that described embodiment is the present invention one
Section Example, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under the premise of creative work, belong to the scope of protection of the invention.
Embodiment one
Fig. 1 gives the structural representation of the fiber gas sensor air chamber of the offer of the embodiment of the present invention one, the present embodiment
Pumping detection is carried out available for the gas to subsurface environment, it is adaptable to steam, methane, carbon monoxide, carbon dioxide, vulcanization
The detection of the multiple gases such as hydrogen, ammonia.As shown in figure 1, the air chamber includes air chamber shell 108, it is complete in air chamber shell 108
Anti- mirror structure, and the blow vent on the housing of air chamber shell 108；Wherein, total reflective mirror structure include input total reflective mirror 105,
Export total reflective mirror 106 and at least one light path total reflective mirror 107.
Wherein, the position relationship of input total reflective mirror 105, output total reflective mirror 106 and at least one light path total reflective mirror 107 can be with
Laser optical path is described, specifically, and incident laser first reflects 105 through inputting total reflective mirror, then anti-through at least one light path total reflective mirror 107
It is mapped on output total reflective mirror 106, is most exported afterwards through exporting the reflection of total reflective mirror 106.
In the present embodiment, blow vent is located at one end of air chamber shell, and the blow vent includes air inlet 110 and gas outlet 111.
In addition, the nvironment transition screw socket 112 contacted with environment to be measured is additionally provided with one end of air inlet of air chamber 110 and gas outlet 111, should
Nvironment transition screw socket 112 can connect extraneous pipeline, and poisonous gas leakage can be prevented when detecting gas.
The present embodiment also includes optical fiber collimator 103 and photodiode 104, above-mentioned optical fiber collimator 103 and photoelectricity two
Pole pipe 104 is located in air chamber shell 108；Wherein, optical fiber collimator 103 is used to input light becoming directional light, to reduce light
Loss；Photodiode 104 is used to the optical signal of output being converted into electric signal, so that main frame carries out information gathering and data point
Analysis.
In addition, the laser input of air chamber is additionally provided with main frame transition screw socket 109 in the present embodiment, the main frame transition screw socket
109 can be fixed on main frame on air chamber, convenient use；End optical fiber flange plate 101 is provided with main frame transition screw socket 109 and SMA connects
Mouth 102, wherein, end optical fiber flange plate 101 is connected by optical fiber with optical fiber collimator 103, and SMA interfaces 102 pass through wire and photoelectricity
Diode 104 is connected, the external laser of end optical fiber flange plate 101, the external main frame of SMA interfaces 102.
In the present embodiment, the bar of the laser from the outgoing of optical fiber collimator 103 can be received meeting photodiode 104
Under part, input total reflective mirror 105, output total reflective mirror 106 and at least one light path total reflective mirror 107 can be placed with multiple angles；It is excellent
Selection of land, to make measurement light path longer and manufacture craft is simple, input total reflective mirror 105 and output total reflective mirror 106 and air chamber shell 108
End face it is at 45 ° place, at least one light path total reflective mirror 107 and air chamber axis parallel are placed；At least one light path total reflective mirror
107 equidistantly can be placed on air chamber inwall to increase light path.In addition, input total reflective mirror 105, output total reflective mirror 106 and
The shape for the light path that at least one light path total reflective mirror 107 is reflected to form includes unclosed polygon or multi-corner star-shape, for example, working as
When the number of at least one light path total reflective mirror 107 is two, in the light path reflected to form, it will be reflected into from input total reflective mirror 105
The light extension of the light and arrival output total reflective mirror 106 that come is intersecting, can form a triangle；When at least one light path total reflective mirror
When 107 number is four, in the light path reflected to form, the light come will be reflected into from input total reflective mirror 105 and arrival output is complete
The light extension of anti-mirror 106 is intersecting, can form a pentalpha, as shown in Figure 1.
The fiber gas sensor air chamber that the embodiment of the present invention one is provided, by gas indoor design total reflective mirror structure, making
Laser multiple reflections in air chamber, it is adaptable to pumping detection, realize the long light path measurement of smaller size smaller air chamber, reduce air chamber
Volume, reduces cost.
Embodiment two
Fig. 2 gives the structural representation of the fiber gas sensor air chamber of the offer of the embodiment of the present invention two, the present embodiment
Available for the gas detection under open environment, it is adaptable to steam, methane, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia etc.
The detection of multiple gases.As shown in Fig. 2 with the embodiment of the present invention one it is different be：
Blow vent 201 in the present embodiment is located on air chamber wall, and does not need nvironment transition screw socket 112.
Specifically, substantial amounts of blow vent 201 is provided with air chamber wall, blow vent 201 can be excellent with Arbitrary distribution on air chamber wall
Blow vent 201 is equably provided with selection of land, air chamber wall, so that the gas for entering air inlet chamber is uniformly distributed, and then makes measurement data more
Close to actual value.
The other structures of the present embodiment are identical with the embodiment of the present invention one, and here is omitted.
The fiber gas sensor air chamber that the embodiment of the present invention two is provided, by gas indoor design total reflective mirror structure, making
Laser multiple reflections in air chamber, it is adaptable to which open environment is detected, is realized the long light path measurement of smaller size smaller air chamber, is reduced
Chamber volume, reduces cost.
Embodiment three
Fig. 3 gives the structural representation of the fiber gas sensor air chamber of the offer of the embodiment of the present invention three, the present embodiment
Concentration Testing is carried out available for the gas to low concentration, is equally applicable to steam, methane, carbon monoxide, carbon dioxide, vulcanization
The detection of the multiple gases such as hydrogen, ammonia.As shown in figure 3, with the embodiment of the present invention one it is different be：
Total reflective mirror structure is multilayer total reflective mirror structure.
Specifically light path is：Incident laser first through first layer input total reflective mirror reflection 1051, then through first layer at least one
Light path total reflective mirror 1071 is reflexed on first layer output total reflective mirror, and second layer input is reflected to through first layer output total reflective mirror 1061
Total reflective mirror, so successively reflects, and finally reflects output by the output total reflective mirror 1062 of last layer.
The present embodiment can set the number of plies of total reflective mirror structure according to the length of measurement light path, and then design minimum length i.e.
The air chamber of minimum volume.
The other structures of the present embodiment are identical with the embodiment of the present invention one, and here is omitted.
Equally, the embodiment of the present invention two can also use multilayer total reflective mirror structure, and here is omitted.
The fiber gas sensor air chamber that the embodiment of the present invention three is provided, by gas indoor design multilayer total reflective mirror knot
Structure, makes laser multiple reflections in air chamber, further increases measurement light path, and the long light path for realizing smaller size smaller air chamber is surveyed
Amount, reduces chamber volume, reduces cost.
It is above-mentioned that only the specific embodiment in the present invention is illustrated, but can not be all as protection scope of the present invention
It is to be zoomed in or out according to the equivalent change or modification or equal proportion made by the design spirit in the present invention, is considered as
Enter protection scope of the present invention.
Claims (9)
1. a kind of fiber gas sensor air chamber, it is characterised in that including air chamber shell, the total reflective mirror knot in air chamber shell
Structure, and the blow vent on air chamber case body, the total reflective mirror structure include input total reflective mirror, output total reflective mirror and extremely
A few light path total reflective mirror；
Incident laser first inputs total reflective mirror reflection through described, then reflexes to the output entirely through at least one described light path total reflective mirror
On anti-mirror, most exported afterwards through the output total reflective mirror reflection；
Wherein, the total reflective mirror structure is multilayer total reflective mirror structure；Incident laser is first through first layer input total reflective mirror reflection, then pass through
At least one light path total reflective mirror of first layer is reflexed on first layer output total reflective mirror, and second is reflected to through first layer output total reflective mirror
Layer input total reflective mirror, so successively reflects, and is finally reflected and exported by the output total reflective mirror of last layer.
2. fiber gas sensor air chamber according to claim 1, it is characterised in that the blow vent is located at the air chamber
One end of shell, the blow vent includes air inlet and gas outlet.
3. fiber gas sensor air chamber according to claim 1, it is characterised in that the blow vent is located at air chamber wall
On.
4. fiber gas sensor air chamber according to claim 2, it is characterised in that also including positioned at the air chamber shell
The nvironment transition screw socket contacted with environment to be measured of one end.
5. according to any described fiber gas sensor air chambers of claim 1-4, it is characterised in that also including outside air chamber
Optical fiber collimator and photodiode in shell.
6. fiber gas sensor air chamber according to claim 5, it is characterised in that also including positioned at the air chamber shell
The main frame transition screw socket of the fixed host computer of the other end.
7. fiber gas sensor air chamber according to claim 6, it is characterised in that also including positioned at the main frame transition
End optical fiber flange plate and SMA interfaces on screw socket；The end optical fiber flange plate is connected by optical fiber with the optical fiber collimator, described
SMA interfaces are connected by wire with the photodiode.
8. fiber gas sensor air chamber according to claim 7, it is characterised in that the input total reflective mirror and output are complete
The end face placement at 45 ° of anti-mirror and the air chamber shell, at least one described light path total reflective mirror is placed with air chamber axis parallel.
9. fiber gas sensor air chamber according to claim 8, it is characterised in that the total reflective mirror structure is reflected to form
Light path shape include unclosed polygon or multi-corner star-shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765324.4A CN104502278B (en) | 2014-12-11 | 2014-12-11 | A kind of fiber gas sensor air chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765324.4A CN104502278B (en) | 2014-12-11 | 2014-12-11 | A kind of fiber gas sensor air chamber |
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| Publication Number | Publication Date |
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| CN104502278A CN104502278A (en) | 2015-04-08 |
| CN104502278B true CN104502278B (en) | 2017-11-07 |
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| CN201410765324.4A Active CN104502278B (en) | 2014-12-11 | 2014-12-11 | A kind of fiber gas sensor air chamber |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398402B (en) * | 2018-01-11 | 2019-12-13 | 清华大学 | multi-optical path gas absorption cavity and trace gas measuring system thereof |
| CN108375555B (en) * | 2018-02-28 | 2021-12-17 | 山东微感光电子有限公司 | Optical fiber methane sensing module, optical fiber multi-point photoelectric methane sensor and system |
| CN110361329A (en) * | 2019-07-29 | 2019-10-22 | 云南电网有限责任公司昭通供电局 | A kind of detection system for the SF6 decomposition product that can improve detection accuracy |
| CN114047134A (en) * | 2022-01-13 | 2022-02-15 | 山东省科学院激光研究所 | Long-optical-path gas absorption cell based on multilayer structure |
| CN117825327A (en) * | 2023-12-26 | 2024-04-05 | 深圳市诺安智能股份有限公司 | Multi-gas laser sensor with equal optical path and high resolution and multi-gas detection method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441166B (en) * | 2008-12-31 | 2010-11-10 | 北京市华云分析仪器研究所有限公司 | Multiple reflection air chamber |
| CN101532952B (en) * | 2009-04-03 | 2010-11-10 | 西安交通大学 | Spectral absorption type air-surveying air chamber |
| CN102230882B (en) * | 2011-04-12 | 2013-03-13 | 朱坚磊 | Air testing platform adopting Herroitt multiple-reflection specimen chamber |
| CN103245614B (en) * | 2013-05-14 | 2015-03-25 | 太原理工大学 | Intelligent infrared methane gas detection device |
| CN103471994A (en) * | 2013-09-09 | 2013-12-25 | 中国电子科技集团公司第八研究所 | Detection device for gas multi-reflect pool with single fiber transmission function |
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Denomination of invention: Gas chamber of optic fiber gas sensor Effective date of registration: 20191111 Granted publication date: 20171107 Pledgee: Beijing Yizhuang International Financing Guarantee Co.,Ltd. Pledgor: BEIJING AEROSPACE YILIAN SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2019990000503 |
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Denomination of invention: A Fiber Optic Gas Sensor Gas Chamber Effective date of registration: 20230519 Granted publication date: 20171107 Pledgee: CHINA ACADEMY OF AEROSPACE AERODYNAMICS Pledgor: BEIJING AEROSPACE YILIAN SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. Registration number: Y2023980041196 |
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Address after: Building 24, 18th Courtyard, Kechuang 13th Street, Beijing Economic and Technological Development Zone, Daxing District, Beijing, 100176 Patentee after: Beijing Aerospace Tianhong Intelligent Equipment Technology Co.,Ltd. Address before: 100074, No. 17 Yungang West Road, Beijing, Fengtai District Patentee before: BEIJING AEROSPACE YILIAN SCIENCE AND TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Denomination of invention: A fiber optic gas sensor chamber Granted publication date: 20171107 Pledgee: CHINA ACADEMY OF AEROSPACE AERODYNAMICS Pledgor: Beijing Aerospace Tianhong Intelligent Equipment Technology Co.,Ltd. Registration number: Y2024990000150 |
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