CN104502278A - Gas chamber of optic fiber gas sensor - Google Patents
Gas chamber of optic fiber gas sensor Download PDFInfo
- Publication number
- CN104502278A CN104502278A CN201410765324.4A CN201410765324A CN104502278A CN 104502278 A CN104502278 A CN 104502278A CN 201410765324 A CN201410765324 A CN 201410765324A CN 104502278 A CN104502278 A CN 104502278A
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- Prior art keywords
- reflective mirror
- total reflective
- air chamber
- 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 20
- 230000007704 transition Effects 0.000 claims description 12
- 230000011514 reflex Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 37
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 238000001514 detection method 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
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- 230000000740 bleeding effect 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
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect 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
- 238000009827 uniform distribution Methods 0.000 description 1
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention provides a gas chamber of an optic fiber gas sensor. The gas chamber comprises a gas chamber housing, a totally reflective mirror structure arranged inside the gas chamber housing and a vent formed in a gas chamber housing body, wherein the totally reflective mirror structure comprises an input total reflective mirror, an output total reflective mirror and at least one light path total reflective mirror; incident laser light is reflected by virtue of the input total reflective mirror firstly, then is reflected on the output total reflective mirror by virtue of the at least one light path total reflective mirror, and is outputted from the output total reflective mirror through reflection. By designing the total reflective structure, the gas chamber disclosed by the invention can be used for reflecting the laser light therein for several times so as to achieve long optical-path measurement with relatively small volume; therefore, the volume of the gas chamber is reduced and cost is saved.
Description
Technical field
The invention belongs to fiber gas sensor field, relate to a kind of fiber gas sensor air chamber.
Background technology
In modern production, life, along with the raising of people's living standard, the requirement that the mankind purify ecologic environment is also more and more higher, and the real-time detection therefore for the harmful gas in air seems particularly important.Especially as the field such as coal and chemical industry, be problem demanding prompt solution to monitoring and prediction that is poisonous in air, harmful gas.And the application of fiber gas sensor in this field and research just flourish.
The monitoring of environmental of fiber gas sensor can be open measurement, also can be detection of bleeding, it is higher that the longer precision of light path measured by air chamber, but fiber gas sensor air chamber combines optical fiber collimator based on a pair or several in prior art, when air chamber measurement light path is longer, the volume of required air chamber is large, and cost of manufacture is higher, and optical maser wavelength is limited.
Summary of the invention
Given this, the invention provides a kind of fiber gas sensor air chamber, object is the volume reducing fiber gas sensor air chamber, reduces costs.
For achieving the above object, the present invention adopts following technical scheme:
A kind of fiber gas sensor air chamber that the embodiment of the present invention provides, comprise air chamber shell, be positioned at the total reflective mirror structure of air chamber shell, and be positioned at the blow vent on air chamber case body, described total reflective mirror structure comprises input total reflective mirror, exports total reflective mirror and at least one light path total reflective mirror;
Incident laser first through described input total reflective mirror reflection, then reflexes on described output total reflective mirror through at least one light path total reflective mirror described, exports finally by described output total reflective mirror reflection.
Further, described total reflective mirror structure is multilayer total reflective mirror structure; Incident laser is first through the reflection of ground floor input total reflective mirror, reflexing to ground floor through at least one light path total reflective mirror of ground floor again exports on total reflective mirror, export total reflective mirror through ground floor to reflect to second layer input total reflective mirror, so successively reflect, finally reflected by the output total reflective mirror of last one deck and export.
Further, described blow vent is positioned at one end of described air chamber shell, and described blow vent comprises air intake opening and gas outlet.
Further, described blow vent is positioned on air chamber wall.
Further, also comprise that be positioned at described air chamber shell one end with environment transition screw socket that is environmental exposure to be measured.
Further, the optical fiber collimator being positioned at air chamber shell and photodiode is also comprised.
Further, the main frame transition screw socket of the fixed host computer being positioned at the described air chamber shell other end is also comprised.
Further, also comprise and be positioned at end optical fiber flange plate on described main frame transition screw socket and SMA interface; Described end optical fiber flange plate is connected with described optical fiber collimator by optical fiber, and described SMA interface is connected with described photodiode by wire.
Further, the end face placement at 45 ° of described input total reflective mirror and output total reflective mirror and described air chamber shell, at least one light path total reflective mirror described and air chamber axis parallel are placed.
Further, the shape of the light path light path of described total reflective mirror structure reflects formation comprises untight polygon or multi-corner star-shape.
Compared with prior art, the advantage of technical solution of the present invention is:
A kind of fiber gas sensor air chamber provided by the invention, by gas indoor design total reflective mirror structure, makes laser multiple reflections in air chamber, and the long light path achieving smaller size smaller air chamber is measured, and reduces chamber volume, reduces cost.
Accompanying drawing explanation
Exemplary embodiment of the present invention will be described in detail by referring to accompanying drawing below, the person of ordinary skill in the art is more clear that above-mentioned and other feature and advantage of the present invention, in accompanying drawing:
The structural representation of the fiber gas sensor air chamber that Fig. 1 provides for the embodiment of the present invention one;
The structural representation of the fiber gas sensor air chamber that Fig. 2 provides for the embodiment of the present invention two;
The structural representation of the fiber gas sensor air chamber that Fig. 3 provides for the embodiment of the present invention three.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, hereinafter with reference to the accompanying drawing in the embodiment of the present invention, by embodiment, technical scheme of the present invention is described clearly and completely, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
Fig. 1 gives the structural representation of the fiber gas sensor air chamber that the embodiment of the present invention one provides, the present embodiment can be used for bleeding detection to the gas of subsurface environment, is applicable to the detection to multiple gases such as steam, methane, carbon monoxide, carbon dioxide, sulfuretted hydrogen, ammonias.As shown in Figure 1, this air chamber comprises air chamber shell 108, is positioned at the total reflective mirror structure of air chamber shell 108, and is positioned at the blow vent on air chamber shell 108 housing; Wherein, total reflective mirror structure comprises input total reflective mirror 105, exports 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 describe by laser optical path, particularly, incident laser is first through input total reflective mirror reflection 105, reflexing to through at least one light path total reflective mirror 107 exports on total reflective mirror 106 again, reflects export finally by output total reflective mirror 106.
In the present embodiment, blow vent is positioned at one end of air chamber shell, and this blow vent comprises air intake opening 110 and gas outlet 111.In addition, be also provided with the environment transition screw socket 112 with environmental exposure to be measured in one end of air inlet of air chamber 110 and gas outlet 111, this environment transition screw socket 112 can connect extraneous pipeline, can prevent poisonous gas leakage when detecting gas.
The present embodiment also comprises optical fiber collimator 103 and photodiode 104, and above-mentioned optical fiber collimator 103 and photodiode 104 are positioned at air chamber shell 108; Wherein, optical fiber collimator 103 for input light is become directional light, to reduce the loss of light; Photodiode 104 is for converting the light signal of output to electric signal, so that main frame carries out information acquisition and data analysis.
In addition, in the present embodiment, the laser input of air chamber is also provided with main frame transition screw socket 109, and main frame can be fixed on air chamber by this main frame transition screw socket 109, easy to use; Main frame transition screw socket 109 is provided with end optical fiber flange plate 101 and SMA interface 102, wherein, end optical fiber flange plate 101 is connected with optical fiber collimator 103 by optical fiber, and SMA interface 102 is connected with photodiode 104 by wire, the external laser instrument of end optical fiber flange plate 101, the external main frame of SMA interface 102.
In the present embodiment, can receive from the condition of the laser of optical fiber collimator 103 outgoing meeting photodiode 104, input total reflective mirror 105, export total reflective mirror 106 and at least one light path total reflective mirror 107 can be placed with multiple angles; Preferably, for making measurement light path longer and manufacture craft is simple, input total reflective mirror 105 and export the end face placement at 45 ° of total reflective mirror 106 and air chamber shell 108, at least one light path total reflective mirror 107 is placed with air chamber axis parallel; At least one light path total reflective mirror 107 can be placed on air chamber inwall equidistantly to increase light path.In addition, the shape of the light path that input total reflective mirror 105, output total reflective mirror 106 and at least one light path total reflective mirror 107 reflect to form comprises untight polygon or multi-corner star-shape, such as, when the number of at least one light path total reflective mirror 107 is two, in the light path reflected to form, the light reflecting light and the arrival output total reflective mirror 106 of coming in from input total reflective mirror 105 is extended and intersects, a triangle can be formed; When the number of at least one light path total reflective mirror 107 is four, in the light path reflected to form, the light reflecting light and the arrival output total reflective mirror 106 of coming in is extended and intersects, a pentalpha can be formed, as shown in Figure 1 from input total reflective mirror 105.
The fiber gas sensor air chamber that the embodiment of the present invention one provides, by gas indoor design total reflective mirror structure, makes laser multiple reflections in air chamber, be applicable to detection of bleeding, the long light path achieving smaller size smaller air chamber is measured, and reduces chamber volume, reduces cost.
Embodiment two
Fig. 2 gives the structural representation of the fiber gas sensor air chamber that the embodiment of the present invention two provides, the present embodiment can be used for the gas detect under open environment, is applicable to the detection to multiple gases such as steam, methane, carbon monoxide, carbon dioxide, sulfuretted hydrogen, ammonias.As shown in Figure 2, different with the embodiment of the present invention one:
Blow vent 201 in the present embodiment is positioned on air chamber wall, and does not need environment transition screw socket 112.
Particularly, air chamber wall has a large amount of blow vents 201, blow vent 201 can Arbitrary distribution on air chamber wall, preferably, air chamber wall has blow vent 201 equably, to make to enter the gas uniform distribution of air chamber, and then makes measurement data closer to actual value.
Identical all with the embodiment of the present invention one of other structures of the present embodiment, repeats no more herein.
The fiber gas sensor air chamber that the embodiment of the present invention two provides, by gas indoor design total reflective mirror structure, makes laser multiple reflections in air chamber, be applicable to open environment detect, the long light path achieving smaller size smaller air chamber is measured, and reduces chamber volume, reduces cost.
Embodiment three
Fig. 3 gives the structural representation of the fiber gas sensor air chamber that the embodiment of the present invention three provides, the present embodiment can be used for carrying out Concentration Testing to the gas of low concentration, is equally applicable to the detection to multiple gases such as steam, methane, carbon monoxide, carbon dioxide, sulfuretted hydrogen, ammonias.As shown in Figure 3, different with the embodiment of the present invention one:
Total reflective mirror structure is multilayer total reflective mirror structure.
Concrete light path is: incident laser is first through ground floor input total reflective mirror reflection 1051, reflexing to ground floor through at least one light path total reflective mirror 1071 of ground floor again exports on total reflective mirror, exporting total reflective mirror 1061 through ground floor reflects to second layer input total reflective mirror, so successively reflect, finally reflect output by the output total reflective mirror 1062 of last one deck.
The present embodiment can arrange the number of plies of total reflective mirror structure according to the length measuring light path, and then designs the air chamber of minimum length and minimum volume.
Identical all with the embodiment of the present invention one of other structures of the present embodiment, repeats no more herein.
Equally, the embodiment of the present invention two also can adopt multilayer total reflective mirror structure, repeats no more herein.
The fiber gas sensor air chamber that the embodiment of the present invention three provides, by gas indoor design multilayer total reflective mirror structure, makes laser multiple reflections in air chamber, further increase measurement light path, the long light path achieving smaller size smaller air chamber is measured, and reduces chamber volume, reduces cost.
Above-mentionedly only the specific embodiment in the present invention to be illustrated; but can not as protection scope of the present invention; every according to the change of the equivalence done by design spirit in the present invention or to modify or equal proportion zooms in or out, all should think and fall into protection scope of the present invention.
Claims (10)
1. a fiber gas sensor air chamber, it is characterized in that, comprise air chamber shell, be positioned at the total reflective mirror structure of air chamber shell, and the blow vent be positioned on air chamber case body, described total reflective mirror structure comprises input total reflective mirror, exports total reflective mirror and at least one light path total reflective mirror;
Incident laser first through described input total reflective mirror reflection, then reflexes on described output total reflective mirror through at least one light path total reflective mirror described, exports finally by described output total reflective mirror reflection.
2. fiber gas sensor air chamber according to claim 1, is characterized in that, described total reflective mirror structure is multilayer total reflective mirror structure; Incident laser is first through the reflection of ground floor input total reflective mirror, reflexing to ground floor through at least one light path total reflective mirror of ground floor again exports on total reflective mirror, export total reflective mirror through ground floor to reflect to second layer input total reflective mirror, so successively reflect, finally reflected by the output total reflective mirror of last one deck and export.
3. fiber gas sensor air chamber according to claim 1, is characterized in that, described blow vent is positioned at one end of described air chamber shell, and described blow vent comprises air intake opening and gas outlet.
4. fiber gas sensor air chamber according to claim 1, is characterized in that, described blow vent is positioned on air chamber wall.
5. fiber gas sensor air chamber according to claim 3, is characterized in that, also comprises that be positioned at described air chamber shell one end with environment transition screw socket that is environmental exposure to be measured.
6., according to the arbitrary described fiber gas sensor air chamber of claim 1-5, it is characterized in that, also comprise the optical fiber collimator and photodiode that are positioned at air chamber shell.
7. fiber gas sensor air chamber according to claim 6, is characterized in that, also comprises the main frame transition screw socket of the fixed host computer being positioned at the described air chamber shell other end.
8. fiber gas sensor air chamber according to claim 7, is characterized in that, also comprises and is positioned at end optical fiber flange plate on described main frame transition screw socket and SMA interface; Described end optical fiber flange plate is connected with described optical fiber collimator by optical fiber, and described SMA interface is connected with described photodiode by wire.
9. fiber gas sensor air chamber according to claim 8, is characterized in that, the end face placement at 45 ° of described input total reflective mirror and output total reflective mirror and described air chamber shell, at least one light path total reflective mirror described and air chamber axis parallel are placed.
10. fiber gas sensor air chamber according to claim 9, is characterized in that, the shape of the light path that described total reflective mirror structure reflects is formed comprises untight 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 |
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| 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 true CN104502278A (en) | 2015-04-08 |
| CN104502278B 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108375555A (en) * | 2018-02-28 | 2018-08-07 | 山东微感光电子有限公司 | Optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and system |
| CN108398402A (en) * | 2018-01-11 | 2018-08-14 | 清华大学 | More light path air absorbing cavities and its trace gas measuring 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 |
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| 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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2014
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Patent Citations (5)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108398402A (en) * | 2018-01-11 | 2018-08-14 | 清华大学 | More light path air absorbing cavities and its trace gas measuring system |
| CN108375555A (en) * | 2018-02-28 | 2018-08-07 | 山东微感光电子有限公司 | Optical fiber methane sensing module, optical fiber multiple spot photo-electric methane transducer and system |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN104502278B (en) | 2017-11-07 |
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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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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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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 |