CN110031405A - Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar - Google Patents
Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar Download PDFInfo
- Publication number
- CN110031405A CN110031405A CN201910168232.0A CN201910168232A CN110031405A CN 110031405 A CN110031405 A CN 110031405A CN 201910168232 A CN201910168232 A CN 201910168232A CN 110031405 A CN110031405 A CN 110031405A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- steel tube
- optical window
- connecting cylinder
- seal isolation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- 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
Landscapes
- Physics & Mathematics (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 invention discloses non-fibers in a kind of detection bar, light path adjustable laser pipeline gas sensor, including ring flange, stainless steel tube is arranged in ring flange side, stainless steel tube front end is connected with gas chamber connecting cylinder, gas chamber connecting cylinder and stainless steel tube inner hole penetrate through, gas chamber connecting cylinder front end is provided with diffuse reflector, gas chamber connecting cylinder connect end side with stainless steel tube and is provided with the first seal isolation optical window, the connection end side of stainless steel tube and flange is provided with optical fiber collimator, the ring flange other side and stainless steel tube perforation are provided with reflection light receiving tube, the tail end of reflection light receiving tube is arranged in photodetector, the second seal isolation of setting optical window in the reflection light receiving tube before detector, filled with nitrogen in stainless steel tube and reflection light receiving tube between first seal isolation optical window and the second seal isolation optical window.It is designed in measurement feeler lever using without fibre, is space propagation optical path inside the body of rod, improves the reliability of detection bar, diffusing reflection ensure that the stability of gas concentration measurement.
Description
Technical field
The present invention relates to non-fibers, light path adjustable laser pipeline gas sensor in a kind of detection bar.
Background technique
As country pays more attention to atmosphere pollution, the high-temperature flue gas of the discharges such as each field of electric force, chemical plant is not only tight
Lattice control the discharge amount of toxic and harmful gas, also want the moisture content in strict control flue gas, are endangered with preventing from generating in chimney
The acidic materials of natural environment.Existing laser smoke moisture instrument, optical patchcord pass through detection bar to the gas chamber of front end, and optical fiber is in bar
It is medium-term and long-term uneven by chimney internal and external temperature, light intensity loss is caused, absorption gas chamber of the front end based on mirror-reflection is easily because high temperature occurs
Deformation is corroded, and further results in intensity loss or spectrum deformation, causes the unstable and accuracy decline of measurement.
Summary of the invention
The purpose of the present invention is to propose to non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar, detections
Optical path is used in bar designs without fibre, and the core devices such as collimator and detector are in except hot environment to be measured, are inside the body of rod
For space propagation optical path, the reliability of detection bar is improved, and diffusing reflection is not influenced by mirror angle minor change, is also ensured
The stability of gas concentration measurement.
To achieve the goals above, the technical scheme is that
Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar, including the method being connect with tested flue
Blue disk, ring flange one side are provided with the stainless steel tube as detection bar, in which: the front end of stainless steel tube is connected with gas chamber connection
Cylinder, gas chamber connecting cylinder and the light transmission of stainless steel tube inner hole penetrate through, and the front end of gas chamber connecting cylinder is provided with diffuse reflector, gas chamber connecting cylinder
The connection end side of stainless steel tube is provided with the first seal isolation optical window, is formed between the first seal isolation optical window and diffuse reflector
Gas effectively absorbs light path section, and the connection end side of stainless steel tube and flange is provided with optical fiber collimator, in ring flange another side
Stainless steel tube perforation is provided with reflection light receiving tube, the tail end for reflecting light receiving tube is provided with photodetector, visits in photoelectricity
The collector lens of the second seal isolation optical window is provided as in reflection light receiving tube before surveying device, collector lens will be for that will reflect
Stainless steel tube and reflected light of the light optically focused on photodetector, between the first seal isolation optical window and the second seal isolation optical window
Filled with nitrogen in reception pipe.
Scheme is further: being buckled and is connected with each other by spiral shell between the gas chamber connecting cylinder and stainless steel tube.
Scheme is further: axial order is provided with multiple first seal isolation optical window card slots in gas chamber connecting cylinder,
First seal isolation optical window is inserted into the optical path length that the different adjustable gases of card slot effectively absorb light path.
Scheme is further: on the ring flange, being respectively arranged with nitrogen input access port and nitrogen output access port
Compared with the prior art, the present invention designs in bar using without fibre, is space propagation optical path inside the body of rod, improves spy
The reliability of measuring staff, and diffusing reflection is not influenced by mirror angle minor change, ensure that the stability of gas concentration measurement.
For laser gas sensor-based system when carrying out high-temperature flue gas environmental gas on-line checking, sensing element directly contacts height
Temperature, even has corrosive flue gas at Gao Chen, influences measurement accuracy, while service life is also restrained.It is of the present invention to swash
It is variable, resistance to form light path using optics diffuse reflector and plus lens using contactless design for phosgene body sensor measuring bar
High temperature is designed to the detection bar of unitary module in conjunction with background gas inflation system without fine gas absorption cell.Detection bar tool
There are the multiple advantages such as high temperature resistant, anticorrosive, light path be variable, solves laser gas sensing and asked in the bottleneck that industrial circle is applied
Topic.
Compared with electrochemical transducer[sensor, measurement accuracy of the present invention is high, long service life, strong interference immunity；
Compared with semiconductor-type sensors, non-contact measurement of the present invention, not by electromagnetic interference, high reliablity；
Compared with weightening finish method hygrometric, integrated design of the present invention can on-line measurement.
The present invention is described in detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is inventive structure schematic diagram.
Specific embodiment
Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar are a kind of high reliability without fine, light path
Adjustable laser gas sensing detects bar sensor, as shown in Figure 1, non-fiber, light path adjustable laser pipeline gas in the detection bar
Body sensor includes: the ring flange 1 connecting with tested flue, and the opposite two sides of ring flange one side therein is provided with
As the stainless steel tube 2 of detection bar, the front end of stainless steel tube is connected with gas chamber connecting cylinder 3, in gas chamber connecting cylinder and stainless steel tube
Hole light transmission perforation, is provided with diffuse reflector 301, the connection end side of gas chamber connecting cylinder and stainless steel tube in the front end of gas chamber connecting cylinder
It is provided with the first seal isolation optical window 302, on the gas chamber connecting cylinder side wall between the first seal isolation optical window and diffuse reflector
It is provided with through-hole to be connected to flue, forms gas between such first seal isolation optical window and diffuse reflector and effectively absorb light
The connection end side of journey section, stainless steel tube and flange is provided with optical fiber collimator 4, therein another in the opposite two sides of ring flange
Side and stainless steel tube perforation are provided with reflection light receiving tube 5, and the tail end of reflection light receiving tube is provided with photodetector 6,
The collector lens 7 as the second seal isolation optical window is provided in the reflection light receiving tube before photodetector, optically focused is saturating
Mirror is used for reflected light optically focused in photodetector, and the first seal isolation optical window and second seals off between optical window not
Filled with nitrogen in rust steel pipe and reflection light receiving tube, on the ring flange, it is respectively arranged with nitrogen input access port 8 and nitrogen
Export access port 9.
Wherein: it is buckled and is connected with each other by spiral shell between the gas chamber connecting cylinder and stainless steel tube, diffuse reflector to opto-electronic receiver
It is plenum space optical path between device, forms gas between the only first seal isolation optical window and diffuse reflector and effectively absorb light path
Section, gas absorb light path effectively for the distance between two times of diffuse reflectors to the first isolation window.
In embodiment: axial order being provided with multiple first seal isolation optical window card slots in gas chamber connecting cylinder, first is close
It insulates and is inserted into the optical path length that the different adjustable gases of card slot effectively absorb light path from optical window.
The present embodiment diffuse reflector 301 reflects the laser being emitted by optical fiber collimator, by 2 body of rod of stainless steel tube, by gathering
Optical lens 7 converges on detector 6；Diffuse reflector and the first optical window are for testing environment to be measured, the cores such as collimating mirror and detector
Heart device is placed in except test environment, is not corroded by adverse circumstances, improves device reliability and service life, the first isolation window and
It is filled with nitrogen between second isolation window and forms nitrogen background, to reach protection core element, and under test gas concentration is not interfered to inhale
The purpose of receipts.
Claims (4)
1. non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar, including what is connect with tested flue
Ring flange, ring flange one side are provided with the stainless steel tube as detection bar, which is characterized in that the front end of stainless steel tube is connected with
Gas chamber connecting cylinder, gas chamber connecting cylinder and the light transmission of stainless steel tube inner hole penetrate through, and the front end of gas chamber connecting cylinder is provided with diffuse reflector, gas
The connection end side of room connecting cylinder and stainless steel tube is provided with the first seal isolation optical window, the first seal isolation optical window and diffuse reflector
Between form gas and effectively absorb light path section, the connection end side of stainless steel tube and flange is provided with optical fiber collimator, in ring flange
Another side and stainless steel tube perforation are provided with reflection light receiving tube, and the tail end for reflecting light receiving tube is provided with photodetector,
The collector lens of the second seal isolation optical window is provided as in the reflection light receiving tube before photodetector, collector lens is used
In the stainless steel tube by reflected light optically focused on photodetector, between the first seal isolation optical window and the second seal isolation optical window
With reflection light receiving tube in filled with nitrogen.
2. sensor according to claim 1, which is characterized in that pass through spiral shell between the gas chamber connecting cylinder and stainless steel tube
Button is connected with each other.
3. sensor according to claim 1, which is characterized in that be provided in gas chamber connecting cylinder along axial order multiple
First seal isolation optical window card slot, the first seal isolation optical window are inserted into the light that the different adjustable gases of card slot effectively absorb light path
Journey distance.
4. sensor according to claim 1, which is characterized in that on the ring flange, be respectively arranged with nitrogen input
Access port and nitrogen export access port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168232.0A CN110031405A (en) | 2019-03-06 | 2019-03-06 | Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168232.0A CN110031405A (en) | 2019-03-06 | 2019-03-06 | Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110031405A true CN110031405A (en) | 2019-07-19 |
Family
ID=67235071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910168232.0A Pending CN110031405A (en) | 2019-03-06 | 2019-03-06 | Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110031405A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924399A (en) * | 2019-12-05 | 2021-06-08 | 比亚迪半导体股份有限公司 | Gas concentration detection device and detection method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6603555B1 (en) * | 1999-01-19 | 2003-08-05 | Anritsu Corporation | Gas detecting apparatus using laser absorption spectroscopy |
| CN101042340A (en) * | 2007-04-30 | 2007-09-26 | 西安交通大学 | Detection method for Optical-fiber transmitting infrared absorption type methane gas |
| CN103245614A (en) * | 2013-05-14 | 2013-08-14 | 太原理工大学 | Intelligent infrared methane gas detection device |
| CN105158187A (en) * | 2015-10-26 | 2015-12-16 | 中国人民解放军军事医学科学院卫生装备研究所 | On-line monitoring type gas chamber of absorbent-type optical fiber gas sensor |
| CN206300898U (en) * | 2016-11-30 | 2017-07-04 | 深圳市唯锐科技有限公司 | A kind of compact laser gas sensor |
| CN107561034A (en) * | 2016-06-30 | 2018-01-09 | 株式会社堀场制作所 | Gas concentration measuring apparatus |
| CN208187966U (en) * | 2018-03-20 | 2018-12-04 | 武汉晟诺仪器科技有限公司 | Extraction-type laser gas analysis device in situ |
-
2019
- 2019-03-06 CN CN201910168232.0A patent/CN110031405A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6603555B1 (en) * | 1999-01-19 | 2003-08-05 | Anritsu Corporation | Gas detecting apparatus using laser absorption spectroscopy |
| CN101042340A (en) * | 2007-04-30 | 2007-09-26 | 西安交通大学 | Detection method for Optical-fiber transmitting infrared absorption type methane gas |
| CN103245614A (en) * | 2013-05-14 | 2013-08-14 | 太原理工大学 | Intelligent infrared methane gas detection device |
| CN105158187A (en) * | 2015-10-26 | 2015-12-16 | 中国人民解放军军事医学科学院卫生装备研究所 | On-line monitoring type gas chamber of absorbent-type optical fiber gas sensor |
| CN107561034A (en) * | 2016-06-30 | 2018-01-09 | 株式会社堀场制作所 | Gas concentration measuring apparatus |
| CN206300898U (en) * | 2016-11-30 | 2017-07-04 | 深圳市唯锐科技有限公司 | A kind of compact laser gas sensor |
| CN208187966U (en) * | 2018-03-20 | 2018-12-04 | 武汉晟诺仪器科技有限公司 | Extraction-type laser gas analysis device in situ |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924399A (en) * | 2019-12-05 | 2021-06-08 | 比亚迪半导体股份有限公司 | Gas concentration detection device and detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104122223B (en) | Double-optical-path multi-gas infrared sensor | |
| CN101285769B (en) | Gas measuring method and device thereof | |
| FI95322C (en) | Spectroscopic measuring sensor for analyzing media | |
| CN107167428A (en) | A kind of absorption cell detected for gas | |
| CN104483282B (en) | Self-calibration gas chamber and optical fiber gas sensor detection system | |
| CN106033054A (en) | Laser temperature and humidity measurement apparatus and temperature and humidity measurement method | |
| RU2010139148A (en) | SENSOR HEAD, CALIBRATION SYSTEM AND MEASURING SYSTEM FOR REAGENT IN THE DRY POWDER | |
| CN102103071A (en) | On-site absorption spectrum gas analysis system | |
| CN101354350A (en) | Optical interference type methane detector | |
| CN104483284A (en) | Optical system and detection device for flue gas monitor | |
| CN110031405A (en) | Non-fiber, light path adjustable laser pipeline gas sensor in a kind of detection bar | |
| CN202886272U (en) | Flue gas analyzer based tube-corner prism | |
| CN204439539U (en) | A kind of optical system of flue gas monitoring instrument and pick-up unit | |
| WO2011040588A1 (en) | Temperature sensitive body, optical temperature sensor, temperature measuring device, and heat flux measuring device | |
| CN201917519U (en) | On-site absorption spectrum gas analysis system | |
| CN102445434A (en) | Refractive index tool and method | |
| CN207147951U (en) | A kind of absorption cell for gas detection | |
| CN204346907U (en) | A kind of self calibration air chamber and fiber gas sensor detection system | |
| CN202083633U (en) | Miniature laser gas detection platform with multi-reflection sample chamber | |
| CN115684009A (en) | Small infrared gas sensor and working principle | |
| CN205449796U (en) | Dust sensor | |
| CN201251546Y (en) | Optical interference type methane detector | |
| CN213022850U (en) | Flue gas analyzer | |
| CN209043483U (en) | A kind of superhigh temperature optical sensor based on sapphire pipe and sapphire sheet | |
| CN100595570C (en) | Semiconductor laser transmittance analysis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190719 |
|
| WD01 | Invention patent application deemed withdrawn after publication |