CN105548139A - Laser Raman gas detection system based on crossed closed light paths - Google Patents
Laser Raman gas detection system based on crossed closed light paths Download PDFInfo
- Publication number
- CN105548139A CN105548139A CN201610022876.5A CN201610022876A CN105548139A CN 105548139 A CN105548139 A CN 105548139A CN 201610022876 A CN201610022876 A CN 201610022876A CN 105548139 A CN105548139 A CN 105548139A
- Authority
- CN
- China
- Prior art keywords
- catoptron
- high pressure
- reaction chamber
- helium neon
- neon tube
- 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.)
- Granted
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
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/65—Raman scattering
- G01N21/658—Raman scattering enhancement Raman, e.g. surface plasmons
Abstract
The invention relates to a laser Raman gas detection system based on crossed closed light paths. Two high-voltage helium-neon glass pipes are symmetrically and obliquely inserted in the same side of a reaction chamber. A first reflection mirror, the first high-voltage helium-neon glass pipe, a prism and a second reflection mirror are sequentially placed on the same axis. A fourth reflection mirror, the second high-voltage helium-neon glass pipe and a third reflection mirror are correspondingly symmetrical to the first reflection mirror, the first high-voltage helium-neon glass pipe and the second reflection mirror about the central horizontal line of the reaction chamber. Helium-neon lasers emitted out of the two high-voltage helium-neon glass pipes form the two closed crossed ring type light paths. Multiple paths of gas enter the reaction chamber from a gas inlet in the reaction chamber and react with the lasers to generate Raman signals, and mixed light is collected through a spectrograph module. According to the system, the active cavity enhancement technology and the Raman gas detection technology are combined, an active cavity is adopted, and structure looseness of a passive cavity is avoided; the crossed ring type light paths are adopted, and the influences of a single light path on returned light are reduced. Various types of gas can be measured online at the same time, and real-time online analysis can be conducted.
Description
Technical field
The present invention relates to a kind of gas detection method, particularly a kind of based on intersecting the laser raman gas detection method closing light path.
Background technology
Oil, the exploitation of rock gas equal energy source also exists a large amount of mixed gass, how effectively gas with various in air-fuel mixture gas is detected that to separate be key in oil-gas mining.Traditional detection method, as gas chromatographic technique, also existing can not continuous detecting, and the problem that maintenance cost is large, and infrared spectrum technology, limited sensing range also makes it can only apply with under respective environment.Therefore, seek a kind of effective gas detection method, the method should be able to tell multiple gases to continuous effective, and has higher precision, has great meaning to the development of petrochemical complex.The application of Raman spectroscopy makes it to become possibility.
In previous design, the multichannel Raman gas detecting instrument that such as U.S. AIR company produces, and Chinese utility model patent, patent name: a kind of well logging Raman spectrum detection system, the patent No.: ZL201120284529.2.These designs all propose some good measures to gas detect, but design in adopt be single channel resonator cavity, utilize laser oscillate between the mirror of two sides.Sometimes not only laser intensity is difficult to be protected, and the impact of parasitic light is also difficult to eliminate.
Summary of the invention
The present invention be directed to present Raman gas detecting instrument Problems existing, propose a kind of based on intersecting the laser raman gas detecting system closing light path, adopt brand-new intersection closed vibration light path design, improve the return influence of light that single channel light path is brought, realize the measurement of online multiple gases.
Technical scheme of the present invention is: a kind of based on intersecting the laser raman gas detecting system closing light path, comprise reaction chamber, the turnover tracheae that reaction chamber is upper and lower, for gathering the spectrometer module of reaction indoor signal above reaction chamber, the high pressure He-Ne glass tube of two two end band Brewster windows, prism, 4 catoptrons, two high pressure He-Ne glass tube symmetrical inclined intercalation reaction room homonymies, first catoptron, first high pressure helium neon tube, prism and the second catoptron are placed on the same axis successively, 4th catoptron, second high pressure helium neon tube and the 3rd catoptron are corresponding to the first catoptron, first high pressure helium neon tube and the second catoptron are placed with reaction chamber central horizontal line symmetry,
From the He-Ne Lasers of the first high pressure helium neon tube injection, by the first reflective mirror refraction arrival the 4th catoptron, reflect by the second high pressure helium neon tube again, arrive the 3rd catoptron, reflect arrival second catoptron again, arrive the first catoptron through prism and the first high pressure helium neon tube again, form a closed ring type light path of intersecting; From the He-Ne Lasers of the second high pressure helium neon tube injection, the second catoptron is arrived successively after the 3rd catoptron refraction, again through prism and the first high pressure helium neon tube, arrive the first catoptron, reflect arrival the 4th catoptron again, arrive the 3rd catoptron through the second high pressure helium neon tube after being refracted, form another closed ring type light path of intersecting;
Multipath gas enters reaction chamber by the air intake opening on reaction chamber, and produce Raman signal with laser reactive, mixed light is collected by spectrometer module, and spectrometer module processing signals send Computer Analysis to generate Raman spectrogram.
The Brewster window filtering at described high pressure helium neon tube two ends S polarization, makes light be converted to linearly polarized light.
Described prism is placed on outside reaction chamber, produces dispersion by frequency to light, and separately the oscillation light of each frequency, has modeling effect.
Described spectrometer module comprises optical filter, monochromator and sensor successively, and in the mixed light of reception, Raman signal 99% is by optical filter through rear, and monochromator send sensor after collecting spectral energy.
Beneficial effect of the present invention is: the present invention is based on the laser raman gas detecting system intersecting and close light path, technology and Raman gas detection technique is strengthened in conjunction with active cavity, adopt active cavity, avoid the loosely organized of passive cavity, adopt intersection ring type light path, reduce the return influence of light that single channel light path is brought.System has the feature of Raman spectroscopy and high precision test, energy on-line measurement simultaneously multiple gases, and carries out on-line analysis.Whole system is compact, and reliability is high, and Detection results is excellent, has good operability.
Accompanying drawing explanation
Fig. 1 the present invention is based on the laser raman gas detecting system schematic diagram intersecting and close light path.
Embodiment
As shown in Figure 1 based on intersecting the laser raman gas detecting system schematic diagram closing light path, reaction chamber about 601 has turnover tracheae 101,102; Reaction chamber 601 also has spectrometer module 201 to gather signal in reaction chamber 601 above; 301,302 is the high pressure He-Ne glass tubes of two ends with Brewster window, two high pressure He-Ne glass tube symmetrical inclined intercalation reaction rooms, and is positioned at the same side; 401 is prism; 501,502,503,504 is catoptron.Laser produces by high pressure helium neon tube, catoptron 501, high pressure helium neon tube 301, prism 401 and catoptron 502 are placed on the same axis successively, catoptron 504, high pressure helium neon tube 302 and catoptron 503 are corresponding to catoptron 501, and high pressure helium neon tube 301 and catoptron 502 are placed with reaction chamber 601 central horizontal line symmetry.Catoptron 501 and catoptron 502 are relative to the parallel placement of high pressure helium neon tube 302, and catoptron 503 and catoptron 504 are relative to the parallel placement of high pressure helium neon tube 301.
Specific implementation process:
Wavelength is that the He-Ne Lasers of 632.8nm sends from high pressure helium neon tube, one road is penetrated from high pressure helium neon tube 301, turned back 60 degree by reflective mirror 501 and arrive catoptron 504, turn back 60 degree again through high pressure helium neon tube 302, arrive catoptron 503, turn back 60 degree and arrive catoptron 502, then through prism 401, high pressure helium neon tube 301 arrives catoptron 501, forms closed ring type light path of intersecting.Another road is penetrated from high pressure helium neon tube 302, successively through catoptron 503, catoptron 502 is arrived after turning back, again through prism 401, high pressure helium neon tube 301, arrives catoptron 501, then arrival catoptron 504 of turning back, arrive catoptron 503 through high pressure He-Ne pipe 302 after turning back, form another closed ring type light path of intersecting.Multipath gas enters reaction chamber from air intake opening, carries out reaction produce Raman signal with laser, then by the optical filter in spectrometer module and monochromator, then through avalanche photodide, finally detected by computer system analysis and generate Raman spectrogram.Native system is successfully made the on-line checkingi of the mixed gas comprising oxygen and nitrogen, and native system has compact conformation, intersection ring type light path, good stability, and reliability is excellent, convenient operation; Can measure multiple gases, highly sensitive, strong adaptability, is convenient to the features such as maintenance simultaneously.
Avoid the loosely organized of passive cavity enhancing technology; Avoid the return light interference that single-path architecture brings.There is the feature of Raman spectroscopy and high precision test, can On-line sampling system be realized and multipath gas detects simultaneously.Whole system simple operation, be easy to safeguard, stability is excellent.
Described plane mirror, the reflectivity of this catoptron, up to 95%, becomes 60 degree with light path.
Described spectrometer module is by monochromator, and sensor and optical filter composition, optical filter has the transmitance of 99% for Raman light, and other light only has the transmitance of 5%.Monochromator better collects spectral energy, and sensor and subsequent detection device then carry out analyzing to spectrum and detect.
Described Brewster window filtering S polarization, makes light be converted to linearly polarized light.
Described prism can carry out dispersion by frequency to light, is separated by the oscillation light of each frequency, has modeling effect.
Described two high pressure helium neon tubes, provide stronger initial excitation light intensity.
There is intersection focus point in described intersection ring type light path, improves the excitation intensity of oscillatory excitation light.
Described light is in the vibration of intersection ring type light path Circulated reflection, and the number of oscillation of light significantly increases.
Described light, in the vibration of cross path Circulated reflection, is conducive to parasitic light and overflows through the change of catoptron because of scattering angle, reduce the vibration of non-exciting light.
Described prism is outside reaction chamber, and the scattering being conducive to parasitic light is overflowed, and improves light quality.
Claims (4)
1. the laser raman gas detecting system based on the closed light path of intersection, it is characterized in that, comprise reaction chamber, the turnover tracheae that reaction chamber is upper and lower, for gathering the spectrometer module of reaction indoor signal above reaction chamber, the high pressure He-Ne glass tube of two two end band Brewster windows, prism, 4 catoptrons, two high pressure He-Ne glass tube symmetrical inclined intercalation reaction room homonymies, first catoptron, first high pressure helium neon tube, prism and the second catoptron are placed on the same axis successively, 4th catoptron, second high pressure helium neon tube and the 3rd catoptron are corresponding to the first catoptron, first high pressure helium neon tube and the second catoptron are placed with reaction chamber central horizontal line symmetry,
From the He-Ne Lasers of the first high pressure helium neon tube injection, by the first reflective mirror refraction arrival the 4th catoptron, reflect by the second high pressure helium neon tube again, arrive the 3rd catoptron, reflect arrival second catoptron again, arrive the first catoptron through prism and the first high pressure helium neon tube again, form a closed ring type light path of intersecting; From the He-Ne Lasers of the second high pressure helium neon tube injection, the second catoptron is arrived successively after the 3rd catoptron refraction, again through prism and the first high pressure helium neon tube, arrive the first catoptron, reflect arrival the 4th catoptron again, arrive the 3rd catoptron through the second high pressure helium neon tube after being refracted, form another closed ring type light path of intersecting;
Multipath gas enters reaction chamber by the air intake opening on reaction chamber, and produce Raman signal with laser reactive, mixed light is collected by spectrometer module, and spectrometer module processing signals send Computer Analysis to generate Raman spectrogram.
2. according to claim 1 based on intersecting the laser raman gas detecting system of closed light path, it is characterized in that, the Brewster window filtering at described high pressure helium neon tube two ends S polarization, makes light be converted to linearly polarized light.
3., according to claim 1 based on intersecting the laser raman gas detecting system closing light path, it is characterized in that, described prism is placed on outside reaction chamber, produces dispersion by frequency to light, and separately the oscillation light of each frequency, has modeling effect.
4. according to claim 1 based on intersecting the laser raman gas detecting system closing light path, it is characterized in that, described spectrometer module comprises optical filter, monochromator and sensor successively, in the mixed light received, Raman signal 99% is by optical filter through rear, and monochromator send sensor after collecting spectral energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610022876.5A CN105548139B (en) | 2016-01-14 | 2016-01-14 | A kind of LR laser raman gas detecting system that light path is closed based on intersection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610022876.5A CN105548139B (en) | 2016-01-14 | 2016-01-14 | A kind of LR laser raman gas detecting system that light path is closed based on intersection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105548139A true CN105548139A (en) | 2016-05-04 |
| CN105548139B CN105548139B (en) | 2018-06-29 |
Family
ID=55827478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610022876.5A Active CN105548139B (en) | 2016-01-14 | 2016-01-14 | A kind of LR laser raman gas detecting system that light path is closed based on intersection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105548139B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198490A (en) * | 2016-08-17 | 2016-12-07 | 中国原子能科学研究院 | A kind of spatial deviation Raman spectroscopic detection system |
| CN108535191A (en) * | 2018-06-15 | 2018-09-14 | 上海理工大学 | LR laser raman gas-detecting device based on diamond shape hysteroscope |
| CN112748102A (en) * | 2021-01-04 | 2021-05-04 | 远正(江苏)水务科技有限公司 | Active cavity traveling wave field enhanced gas Raman detection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3704951A (en) * | 1969-06-11 | 1972-12-05 | Cary Instruments | S light cell for increasing the intensity level of raman light emission from a sample |
| US4648714A (en) * | 1985-09-11 | 1987-03-10 | University Of Utah | Molecular gas analysis by Raman scattering in intracavity laser configuration |
| CN102305784A (en) * | 2011-05-13 | 2012-01-04 | 北京师范大学 | Rapid laser Raman spectrum hydrocarbon detection method for drilling fluid |
| CN203606290U (en) * | 2013-12-12 | 2014-05-21 | 无锡萤光海光电科技有限公司 | Raman system |
| CN103837520A (en) * | 2014-03-03 | 2014-06-04 | 上海理工大学 | Optic travelling wave cavity enhanced laser raman gas concentration detection device |
-
2016
- 2016-01-14 CN CN201610022876.5A patent/CN105548139B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3704951A (en) * | 1969-06-11 | 1972-12-05 | Cary Instruments | S light cell for increasing the intensity level of raman light emission from a sample |
| US4648714A (en) * | 1985-09-11 | 1987-03-10 | University Of Utah | Molecular gas analysis by Raman scattering in intracavity laser configuration |
| CN102305784A (en) * | 2011-05-13 | 2012-01-04 | 北京师范大学 | Rapid laser Raman spectrum hydrocarbon detection method for drilling fluid |
| CN203606290U (en) * | 2013-12-12 | 2014-05-21 | 无锡萤光海光电科技有限公司 | Raman system |
| CN103837520A (en) * | 2014-03-03 | 2014-06-04 | 上海理工大学 | Optic travelling wave cavity enhanced laser raman gas concentration detection device |
Non-Patent Citations (1)
| Title |
|---|
| 胡佳惠 等: "布里渊散射的分布式光纤温度传感器的研究进展", 《激光杂志》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106198490A (en) * | 2016-08-17 | 2016-12-07 | 中国原子能科学研究院 | A kind of spatial deviation Raman spectroscopic detection system |
| CN108535191A (en) * | 2018-06-15 | 2018-09-14 | 上海理工大学 | LR laser raman gas-detecting device based on diamond shape hysteroscope |
| CN112748102A (en) * | 2021-01-04 | 2021-05-04 | 远正(江苏)水务科技有限公司 | Active cavity traveling wave field enhanced gas Raman detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105548139B (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104280362B (en) | A kind of superheated vapor laser spectrum on-line detecting system | |
| CN107884382B (en) | Gas detection system based on hollow anti-resonance optical fiber | |
| CN101694460B (en) | Self-adaptive differential absorption spectrum measuring method of concentration of flue gas pollutants and device | |
| CN106802288B (en) | Gas-detecting device and method based on tunable laser and super continuous spectrums laser | |
| CN101819140B (en) | Continuous monitoring device and method of gaseous elemental mercury concentration | |
| CN105424631A (en) | Ultrahigh sensitivity nitrogen oxide measurement system based on ultraviolet-visible waveband absorption spectrum | |
| CN105572099A (en) | Laser Raman gas detection device based on concentric endoscope | |
| CN104364635A (en) | Collisional broadening compensation using real or near-real time validation in spectroscopic analyzers | |
| CN105424635A (en) | Ultraviolet spectrum flue gas analyzer | |
| CN104568910B (en) | Slit applied to well logging scene is divided Raman spectrum gas analysis system | |
| CN103698298A (en) | Device for measuring gas concentration based on short cavity enhanced correlation spectroscopy, and method for measuring gas concentration by adopting device | |
| CN105548139A (en) | Laser Raman gas detection system based on crossed closed light paths | |
| CN108535191B (en) | Laser Raman gas detection device based on rhombus cavity mirror | |
| CN104729996A (en) | Reflective optical path device of online laser gas analyzer | |
| CN102183460B (en) | Light path adjustable spectrophotometer detection head | |
| CN205317662U (en) | UV spectrum flue gas analyzer | |
| CN202177572U (en) | Spectral measuring system for multi-component gas | |
| CN108444972A (en) | A kind of laser gas Raman spectroscopic detection system based on capillary enhancing | |
| CN202330277U (en) | Portable ultraviolet spectrum flue gas analyzer | |
| CN202421062U (en) | Ultraviolet analyzer for measuring sulfur dioxide and nitrogen oxides | |
| CN205786294U (en) | The many gas-detecting devices of multiband | |
| CN204374087U (en) | A kind of Raman spectrum test macro based on liquid core waveguide | |
| CN108535192A (en) | LR laser raman gas-detecting device based on Multi-path proportional detection | |
| CN108459005A (en) | A kind of laser gas Raman spectrum detection system based on forward scattering orientation detection | |
| CN101625306B (en) | Device for measuring gas concentration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191125 Address after: Room 1410-1411, North building, No. 1699, Zuchongzhi South Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kunshan Shangli Optoelectronic Information Application Technology Research Institute Co., Ltd Address before: 200093 Shanghai military road, Yangpu District, No. 516 Patentee before: University of Shanghai for Science and Technology |
|
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Room 1410-1411, North building, No. 1699, Zuchongzhi South Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee after: Kunshan Shangli Optoelectronic Information Application Technology Research Institute Co., Ltd Address before: Room 1410-1411, North building, No. 1699, Zuchongzhi South Road, Yushan Town, Kunming City, Jiangsu Province 215000 Patentee before: Kunshan Shangli Optoelectronic Information Application Technology Research Institute Co., Ltd |