CN104880434A - Detection device and method for weak absorbing gas in complex environment - Google Patents
Detection device and method for weak absorbing gas in complex environment Download PDFInfo
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Abstract
The invention provides a detection device for a weak absorbing gas in a complex environment. The detection device comprises a first light source, a second light source, a first detector, a second detector, and an analysis module, wherein the wave length of first measuring light emitted by the first light source covers the absorption line of the weak absorbing gas; the wave length of second measuring light emitted by the second light source covers the absorption line of a strong interfering gas in the complex environment; in the absorption area of the weak absorbing gas of the first measuring light, the absorption of the strong interfering gas is 10 times larger than that of the weak absorbing gas; the first detector is used for converting the first measuring light penetrating the complex environment into a first electric signal, and sending the first electric signal to the analysis module; the second detector is used for converting the second measuring light penetrating the complex environment into a second electric signal, and sending the second electric signal to the analysis module; the analysis module is used for processing the received second electric signal according to the optical absorption spectrometry, so as to obtain the content of the strong interfering gas, and obtain the type and content of the weak absorbing gas according to the differential optical absorption spectrometry and the content of the strong interfering gas. The detection device has the advantages that the accuracy is high; the structure is simple; the cost is low.
Description
Technical field
The present invention relates to photoelectric analysis, particularly the pick-up unit of weak absorbing gas and method in complex environment.
Background technology
Benzene homologues typically refers to benzene, toluene, ethylbenzene, dimethylbenzene and other substituted benzene compounds, for the colourless liquid with special aromatic odor, it is widely used important solvent in the field such as paint and coating of organic chemical industry, agricultural chemicals, medicine, house decoration, due to its high volatile volatile, these benzene homologues are present in air with the form of steam at normal temperatures; Separately, also can discharge a large amount of benzene homologues gas in motor-vehicle tail-gas, smoking and various combustion process, they are very easily absorbed by the body by respiratory system or skin, harmful to human nervous system, even carcinogenic, teratogenesis, mutagenesis.Therefore receive extensive attention to the detection of the benzene homologues in air and research, the emission standard of corresponding permission has all been formulated in every country and area.At present, in gas, the detection method of benzene homologues mainly contains:
1. vapor-phase chromatography, this detection method is CNS " in the air of residential district benzene, toluene and dimethylbenzene health test method " specified standard method.As described in patent CN104597158A, CN103675134A, the method ultimate principle is: by adsorption and enrichment, desorb, then sends into chromatograph-mas spectrometer analysis.CN101923076A, CN104597182A also disclose the method using gas chromatographic analysis benzene homologues.The method has instrument complexity, high in cost of production is not enough.
2. sensor method, disclosed in patent CN101713763A, using to the ionic liquid of the special sensitivity of the benzene homologues sensitive coating material as sensing sensing element or resonator induction zone, utilize measured matter reversibly attached effect of physical preferences adsorption/desorption on induction region surface, by measure the change of sensor output frequency signal in mechanism realize to determination object continuous, detect in real time.Patent CN203720165U, CN202903774U also disclose similar sensor type benzene homologues detector.The method has difficult processing, high in cost of production is not enough.
3. ionization method, as shown in Figure 1, patent CN2438123Y discloses a kind of benzene homologues fast detector, be made up of sample introduction source, vacuum chamber and the ionized region be placed in vacuum chamber and ion detector, ionized region is arranged in parallel by different distance by three pieces of pole plates, and electrode 1 and electrode 2 are added with high direct voltage respectively, electrode 3 is zero potential, defining between electrode 1 and electrode 2 is ionized region, is accelerating region between electrode 2 and electrode 3, and electrode 3 is field-free region below.When sample gas enters after ionized region ionized by Ultra-Violet Laser, select the benzene homologues ion obtaining identical energy under electric field action, because their quality is different, the time successively arriving ion detector 6 is also different, detects by materials such as the benzene,toluene,xylenes that ionizes simultaneously through instantaneous state recorder 7 points.The method has instrument complexity, high in cost of production is not enough.
The ultimate principle of DOAS technology (differential optical absorption spectroscopy difference absorption spectrum) is: when being propagated in gas by light, various weak absorbing dusty gas composition comes its kind of inverting and concentration in the absorption spectrum feature of Uv and visible light wave band, thus realizes the continuous real time on-line monitoring to multiple dusty gas.Because DOAS technology has the advantages such as multiple gases detects simultaneously, be widely used in flue gas discharge continuous monitoring system.
The composition of air is very complicated, and particularly recent year automobile and industrial circle discharge a large amount of benzene homologues, volatile organic matter VOCs.Example is detected as with weak absorbing benzene homologues in an atmosphere, its characteristic absorption is many within the scope of 250-290nm, but when DOAS technology being used for the measurement of the benzene homologues such as the benzene,toluene,xylene in air, can find that inversion result and actual deviation are very large, and agnogenio.
Summary of the invention
For solving the deficiency in above-mentioned prior art, the invention provides that a kind of precision is high, structure is simple, the pick-up unit of weak absorbing gas in the complex environment of low cost.
The object of the invention is to be achieved through the following technical solutions:
A pick-up unit for weak absorbing gas in complex environment, described pick-up unit comprises:
First light source, the first wavelength measuring light that described first light source sends covers the absorption line of described weak absorbing gas;
Secondary light source, the second wavelength measuring light that described secondary light source sends covers the absorption line being different from the absorption line of described weak absorbing gas of strong jamming gas in described complex environment; Measure in the absorption region of the described weak absorbing gas of light described first, the absorption of strong jamming gas is greater than 10 times (relative and weak absorbing gases, the absorption of interference gas is strong absorption) of the absorption of described weak absorbing gas;
First detector, described first detector is used for being converted to the first electric signal by measuring light through first of described complex environment, and is sent to analysis module;
Second detector, described second detector is used for being converted to the second electric signal by measuring light through second of described complex environment, and is sent to described analysis module;
Analysis module, described second electric signal that described analysis module receives according to absorption spectroscopy techniques process, thus obtain the content of strong jamming gas, and know classification and the content of described weak absorbing gas according to the content of difference absorption spectrum technology, described strong jamming gas.
According to above-mentioned pick-up unit, preferably, described weak absorbing gas is benzene homologues, and described strong jamming gas is oxygen, and the described first wavelength measuring light covers 250-290nm.
According to above-mentioned pick-up unit, alternatively, described first detector comprises further:
Spectral module, described spectral module is used for spatially separating measuring light through first of described complex environment;
Photoelectric commutator array, described photoelectric commutator array is used for the monochromatic light after light splitting to be converted to the first electric signal.
According to above-mentioned pick-up unit, alternatively, described pick-up unit comprises further:
Coupling module, described first coupling module is used for that described first measurement light and second are measured optically-coupled and enters the first optical fiber, and the light exported from described first optical fiber is injected described complex environment;
Beam splitting module, described beam splitting module is used for that the first measurement light and second of the described complex environment of injection is measured light and inputs the second optical fiber, the 3rd optical fiber respectively; The downstream of described second optical fiber, the 3rd optical fiber arranges the first detector, the second detector respectively.
According to above-mentioned pick-up unit, preferably, described secondary light source is tunable laser.
The present invention also aims to the detection method providing weak absorbing gas in the high complex environment of a kind of precision, this goal of the invention is achieved by the following technical programs:
The detection method of weak absorbing gas in complex environment, described detection method comprises the following steps:
(A1) absorption line that weak absorbing gas is corresponding is selected, at the absorption line place that described weak absorbing gas is corresponding, strong jamming gas has absorption, and in the absorption region of described weak absorbing gas, the absorption of strong jamming gas is greater than 10 times of the absorption of described weak absorbing gas;
Select the absorption line being different from the absorption line of described weak absorbing gas of described strong jamming gas;
(A2) the first measurement light that the first light source sends passes described complex environment, by weak absorbing gas and strong jamming gas absorption, is converted to the first electric signal afterwards, and send analysis module by the first detector;
The second measurement light that secondary light source sends, through described complex environment, at the absorption line place of the described strong jamming gas selected by strong jamming gas absorption, is converted to the second electric signal by the second detector afterwards, and send analysis module;
(A3) described second electric signal that receives according to absorption spectroscopy techniques process of analysis module, thus obtain the content of strong jamming gas, and know classification and the content of described weak absorbing gas according to the content of difference absorption spectrum technology, described strong jamming gas.
According to above-mentioned detection method, preferably, described weak absorbing gas is benzene homologues, and described strong jamming gas is oxygen, and the described first wavelength measuring light covers 250-290nm.
According to above-mentioned detection method, preferably, the wavelength of the absorption line that oxygen is corresponding is 760nm.
According to above-mentioned detection method, alternatively, in step (A2), first measures light and second measures light respectively by Optical Fiber Transmission to coupling mechanism, and is coupled into the first optical fiber.
According to above-mentioned detection method, preferably, in step (A2), the second electric signal that described analysis module receives according to tunable diode laser absorption spectrometry technical finesse.
Compared with prior art, the beneficial effect that the present invention has is:
1. accuracy of detection is high
By the absorption line that the kind of gas in the complex environments such as analyse atmos, content and gas are corresponding, in the wave band of absorption line corresponding to weak absorbing gas, there is some strong jamming gases absorbed by force (relative and weak absorbing gas, the absorption of strong jamming gas is strong absorption), seriously disturb the application of DOAS technology; Utilize high precision, fast laser absorption spectroscopy to detect the content of strong jamming gas, recycling DOAS technology deducts the interference of strong jamming gas, thus records classification and the content of the gases such as weak absorbing benzene homologues in the complex environments such as air exactly;
2. simple, the low cost of structure
Utilize the light path of original DOAS technology, only need to add the LASER Light Source of technology maturation, detector and analysis module, without the need to changing original light path, the real-time continuous not affecting DOAS system is measured.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present invention will be easier to understand.Those skilled in the art it is easily understood that: these accompanying drawings only for illustrating technical scheme of the present invention, and and are not intended to be construed as limiting protection scope of the present invention.In figure:
Fig. 1 is the structure diagram of the benzene homologues fast detector according to prior art;
Fig. 2 is the process flow diagram of the detection method according to the embodiment of the present invention 1.
Embodiment
Fig. 2 and following description describe Alternate embodiments of the present invention and how to implement to instruct those skilled in the art and to reproduce the present invention.In order to instruct technical solution of the present invention, simplifying or having eliminated some conventional aspects.Those skilled in the art should understand that the modification that is derived from these embodiments or replace will within the scope of the invention.Those skilled in the art should understand that following characteristics can combine to form multiple modification of the present invention in every way.Thus, the present invention is not limited to following Alternate embodiments, and only by claim and their equivalents.
Embodiment 1:
The pick-up unit of Determination of Trace Benzene in the room air of the embodiment of the present invention, described pick-up unit comprises:
Xenon lamp, the wavelength of the ultraviolet light that described xenon lamp sends comprises 250-290nm, contains benzene homologues characteristic of correspondence absorption line;
Semiconductor laser with tunable and driving thereof, the characteristic absorpting spectruming line 760nm of the corresponding oxygen of the light that described laser instrument sends; In the absorption bands 250-290nm of benzene homologues, in room air, the absorption of oxygen is greater than 10 times of the absorption of benzene homologues;
Coupling mechanism, the measurement light that described xenon lamp and laser instrument send respectively by optical fiber input coupler, and is coupled into the first optical fiber;
White pond, the emergent light of the first optical fiber after overconvergence in White pond multiple reflections, be passed into weak absorbing benzene homologues, the oxygen absorption in the room air in White pond, after assembling, beam splitter is entered from the light of White pond outgoing, separate two-beam, respectively by the second optical fiber, the 3rd Optical Fiber Transmission;
First detector, described first detector is arranged on the end of the second optical fiber, comprises spectral module (as grating), photoelectric commutator array (as line array CCD, CMOS), and the first electric signal that described array exports send analysis module;
Second detector, described second detector is arranged on the end of the 3rd optical fiber, and the second electric signal of output send analysis module;
Analysis module, described second electric signal that described analysis module receives according to laser absorption spectroscopy process, thus the content of oxygen in acquisition room air, and know classification and the content of described benzene homologues according to the content of difference absorption spectrum technology, described oxygen.
Fig. 2 schematically illustrates the process flow diagram of the detection method of weak absorbing benzene homologues in the room air of the present embodiment, and be also the application of above-mentioned detection device, as shown in Figure 2, described detection method comprises the following steps:
(A1) absorption line that in room air, weak absorbing (trace) benzene homologues is corresponding is selected, at the absorption line place of described benzene homologues, the oxygen of room air middle and high concentration has strong absorption, in the absorption region of described benzene homologues, the absorption of oxygen is greater than 10 times of the absorption of described weak absorbing benzene homologues;
Select the absorption line as the oxygen of strong jamming gas, as 760nm;
(A2) xenon lamp send first measure light by optical fiber input coupler, the light that laser instrument sends inputs described coupling mechanism by optical fiber, the first optical fiber is coupled into through coupling mechanism, the emergent light of the first optical fiber through overconvergence laggard enter in White pond and multiple reflections, be passed into weak absorbing benzene homologues, the oxygen absorption in the room air in White pond, after assembling, enter beam splitter from the light of White pond outgoing, separate two-beam, respectively by the second optical fiber, the 3rd Optical Fiber Transmission;
First detector is arranged on the end of the second optical fiber, comprises spectral module (as grating), photoelectric commutator array (as line array CCD, CMOS), and the first electric signal that described array exports send analysis module;
Second detector is arranged on the end of the 3rd optical fiber, and the second electric signal of output send analysis module;
(A3) described second electric signal that receives according to laser absorption spectroscopy process of analysis module, thus the content of oxygen in acquisition room air, and according to difference absorption spectrum technology, the content of described oxygen knows classification and the content of described benzene homologues, be specially: utilize TDLAS technical finesse second electric signal, know and detect oxygen molecule quantity on path, and then obtain the absorption spectrum of oxygen within the scope of 250-290nm, again with the optical transfer function convolution of the first detector, obtain deduction spectrum, classification and the content of described benzene homologues finally can be known according to the spectrum after DOAS technical finesse (the first detector obtains) DOAS spectrum deduct spectrum.
Embodiment 2:
The pick-up unit of Determination of Trace Benzene in the air of the embodiment of the present invention, described pick-up unit comprises:
Deuterium lamp, the wavelength of the ultraviolet light that described deuterium lamp sends comprises 250-290nm, contains benzene homologues characteristic of correspondence absorption line;
Semiconductor laser with tunable and driving thereof, the characteristic absorpting spectruming line 760nm of the corresponding oxygen of the light that described laser instrument sends; In 250-290nm, the absorption of oxygen is greater than 10 times of the absorption of benzene homologues;
Coupling mechanism, the measurement light that described xenon lamp and laser instrument send respectively by optical fiber input coupler, and is coupled into the first optical fiber;
The return structure of light, described structure comprises concave mirror, be in concave mirror side successively and the first catoptron of being oppositely arranged of reflecting surface, second catoptron, corner reflector, described concave mirror has exit window, first catoptron is vertically arranged, second mirror tilt is arranged, make the light of output first optical fiber after the second catoptron reflection, roundtrip between above-mentioned catoptron in open type structure, last from described exit window outgoing, by Optical Fiber Transmission to fiber optic splitter, separate two-beam, respectively by the second optical fiber, 3rd Optical Fiber Transmission,
First detector, described first detector is arranged on the end of the second optical fiber, comprises spectral module (as grating), photoelectric commutator array (as line array CCD, CMOS), and the first electric signal that described array exports send analysis module;
Second detector, described second detector is arranged on the end of the 3rd optical fiber, and the second electric signal of output send analysis module;
Analysis module, described second electric signal that described analysis module receives according to laser absorption spectroscopy process, thus the content obtaining atmospheric oxygen, and classification and the content of described benzene homologues is known according to the content of difference absorption spectrum technology, described oxygen.
The detection method of weak absorbing benzene homologues in the air of the present embodiment, be also the application of above-mentioned detection device, described detection method comprises the following steps:
(A1) absorption line that in air, weak absorbing benzene homologues is corresponding is selected, at the absorption line place of described benzene homologues, the oxygen of air middle and high concentration has strong absorption, in the absorption region of described weak absorbing benzene homologues, the absorption of wherein oxygen be greater than 10 times of the absorption of described weak absorbing benzene homologues;
Select the absorption line as the oxygen of strong jamming gas, as 760nm;
(A2) deuterium lamp send first measure light by optical fiber input coupler, the light that laser instrument sends inputs described coupling mechanism by optical fiber, the first optical fiber is coupled into through coupling mechanism, the emergent light of the first optical fiber enters the return structure of light after overconvergence, roundtrip in the return structure of light, finally from the exit window outgoing of concave mirror, by Optical Fiber Transmission to beam splitter, separate two-beam, respectively by the second optical fiber, the 3rd Optical Fiber Transmission;
First detector is arranged on the end of the second optical fiber, comprises spectral module (as grating), photoelectric commutator array (as line array CCD, CMOS), and the first electric signal that described array exports send analysis module;
Second detector is arranged on the end of the 3rd optical fiber, and the second electric signal of output send analysis module;
(A3) described second electric signal that receives according to laser absorption spectroscopy process of analysis module, thus obtain the content of atmospheric oxygen, and according to difference absorption spectrum technology, the content of described oxygen knows classification and the content of described benzene homologues, be specially: utilize TDLAS technical finesse second electric signal, know and detect oxygen molecule quantity on path, and then obtain the absorption spectrum of oxygen within the scope of 250-290nm, again with the optical transfer function convolution of the first detector, obtain deduction spectrum, classification and the content of benzene homologues finally can be known according to the spectrum after DOAS technical finesse (the first detector obtains) DOAS spectrum deduct spectrum.
Embodiment 3:
The structure diagram of the pick-up unit of the benzene homologues of the embodiment of the present invention, as different from Example 1:
1, do not re-use optical fiber, coupling mechanism and fiber optic splitter, but use the slide be obliquely installed, the ultraviolet light that xenon lamp sends is injected in White pond through after slide, and the light that laser instrument sends is injected in described White pond after the reflection of slide; In like manner, also adopt when measuring light injection White pond the slide be obliquely installed, ultraviolet light is received by the first detector through this slide, and laser is received by the second detector by after the reflection of this slide.In order to the reflection of the transmission and laser that strengthen ultraviolet light, above-mentioned slide plates ultraviolet light anti-reflection film and laser increases anti-film.
2, in the absorption region of benzene homologues, the nitrogen dioxide had in complex environment has strong absorption, exceedes more than 10 times of benzene homologues, therefore need get rid of the interference of nitrogen dioxide.Semiconductor laser sends the laser of 680nm, corresponding to the absorption line of nitrogen dioxide.
Above-described embodiment is only exemplarily give the situation detecting air, Indoor Air Benzene system thing, certainly can also apply in other cases.Essence of the present invention is: in complex environment, if there is strong absorption (compared with weak absorbing gas in the wave band of the absorption line that weak absorbing gas is corresponding, as being not less than 10 times) the absorption of strong jamming gas time, all can use technical scheme of the present invention, high-precision laser absorption spectroscopy is utilized to know the content of strong jamming gas, the absorption of recycling difference absorption spectrum technology deduction strong jamming gas, thus obtain classification and the content of weak absorbing gas.
Claims (10)
1. the pick-up unit of weak absorbing gas in complex environment, is characterized in that: described pick-up unit comprises:
First light source, the first wavelength measuring light that described first light source sends covers the absorption line of described weak absorbing gas;
Secondary light source, the second wavelength measuring light that described secondary light source sends covers the absorption line being different from the absorption line of described weak absorbing gas of strong jamming gas in described complex environment; Measure in the absorption region of the described weak absorbing gas of light described first, the absorption of strong jamming gas is greater than 10 times of the absorption of described weak absorbing gas;
First detector, described first detector is used for being converted to the first electric signal by measuring light through first of described complex environment, and is sent to analysis module;
Second detector, described second detector is used for being converted to the second electric signal by measuring light through second of described complex environment, and is sent to described analysis module;
Analysis module, described second electric signal that described analysis module receives according to absorption spectroscopy techniques process, thus obtain the content of strong jamming gas, and know classification and the content of described weak absorbing gas according to the content of difference absorption spectrum technology, described strong jamming gas.
2. pick-up unit according to claim 1, is characterized in that: described weak absorbing gas is benzene homologues, and described strong jamming gas is oxygen, and the described first wavelength measuring light covers 250-290nm.
3. pick-up unit according to claim 1, is characterized in that: described first detector comprises further:
Spectral module, described spectral module is used for spatially separating measuring light through first of described complex environment;
Photoelectric commutator array, described photoelectric commutator array is used for the monochromatic light after light splitting to be converted to the first electric signal.
4. pick-up unit according to claim 1, is characterized in that: described pick-up unit comprises further:
Coupling module, described coupling module is used for that described first measurement light and second are measured optically-coupled and enters the first optical fiber, and the light exported from described first optical fiber is injected described complex environment;
Beam splitting module, described beam splitting module is used for that the first measurement light and second of the described complex environment of injection is measured light and inputs the second optical fiber, the 3rd optical fiber respectively; The downstream of described second optical fiber, the 3rd optical fiber arranges the first detector, the second detector respectively.
5. pick-up unit according to claim 1, is characterized in that: described secondary light source is tunable laser.
6. the detection method of weak absorbing gas in complex environment, described detection method comprises the following steps:
(A1) absorption line that weak absorbing gas is corresponding is selected, at the absorption line place that described weak absorbing gas is corresponding, strong jamming gas has absorption, and in the absorption region of described weak absorbing gas, the absorption of strong jamming gas is greater than 10 times of the absorption of described weak absorbing gas;
Select the absorption line being different from the absorption line of described weak absorbing gas of described strong jamming gas;
(A2) the first measurement light that the first light source sends passes described complex environment, by weak absorbing gas and strong jamming gas absorption, is converted to the first electric signal afterwards, and send analysis module by the first detector;
The second measurement light that secondary light source sends, through described complex environment, at the absorption line place of the described strong jamming gas selected by strong jamming gas absorption, is converted to the second electric signal by the second detector afterwards, and send analysis module;
(A3) described second electric signal that receives according to absorption spectroscopy techniques process of analysis module, thus obtain the content of strong jamming gas, and know classification and the content of described weak absorbing gas according to the content of difference absorption spectrum technology, described strong jamming gas.
7. detection method according to claim 6, is characterized in that: described weak absorbing gas is benzene homologues, and described strong jamming gas is oxygen, and the described first wavelength measuring light covers 250-290nm.
8. detection method according to claim 7, is characterized in that: the wavelength of the absorption line that oxygen is corresponding is 760nm.
9. detection method according to claim 6, is characterized in that: in step (A2), and first measures light and second measures light respectively by Optical Fiber Transmission to coupling mechanism, and is coupled into the first optical fiber.
10. detection method according to claim 6, is characterized in that: in step (A2), the second electric signal that described analysis module receives according to tunable diode laser absorption spectrometry technical finesse.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018314A (en) * | 2016-06-30 | 2016-10-12 | 杭州泽天科技有限公司 | Multi-band multi-gas detection device and method |
| CN108918439A (en) * | 2015-11-10 | 2018-11-30 | 上海禾赛光电科技有限公司 | Machine-carried type indoor gas telemetry system and method |
| CN108918441A (en) * | 2015-11-25 | 2018-11-30 | 上海禾赛光电科技有限公司 | A kind of gas remote measurement method and device |
| CN109100317A (en) * | 2018-09-11 | 2018-12-28 | 杭州因诺维新科技有限公司 | Photo-electric gas monitoring system and method |
| CN114324209A (en) * | 2021-12-29 | 2022-04-12 | 杭州谱育科技发展有限公司 | Fluid detection device and method based on absorption spectrum technology |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002082016A (en) * | 2000-09-06 | 2002-03-22 | Ando Electric Co Ltd | Tunable light source device |
| WO2002061402A1 (en) * | 2001-01-30 | 2002-08-08 | Anritsu Corporation | Laser absorption spectral diffraction type gas detector and method for gas detection using laser absorption spectral diffraction |
| CN1439880A (en) * | 2003-01-21 | 2003-09-03 | 中国科学院安徽光学精密机械研究所 | Method and apparatus for real time remote determining multiple pollutants in vehicle exhaust |
| CN2695957Y (en) * | 2003-11-14 | 2005-04-27 | 上海波汇通信科技有限公司 | Differential absorption fibre-optical methane gas sensor |
| CN101460829A (en) * | 2006-04-19 | 2009-06-17 | 光学传感公司 | Measuring water vapor in hydrocarbons |
| CN102495021A (en) * | 2011-12-12 | 2012-06-13 | 山东大学 | System and method for detecting trace amount of steam based on two absorption peaks |
| JP2014119323A (en) * | 2012-12-14 | 2014-06-30 | Mitsubishi Heavy Ind Ltd | Gas leakage detection system |
| CN104007069A (en) * | 2014-05-20 | 2014-08-27 | 中国科学院合肥物质科学研究院 | Differential optical absorption spectroscopy measurement system based on off-axis paraboloid mirror |
-
2015
- 2015-05-26 CN CN201510275612.6A patent/CN104880434B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002082016A (en) * | 2000-09-06 | 2002-03-22 | Ando Electric Co Ltd | Tunable light source device |
| WO2002061402A1 (en) * | 2001-01-30 | 2002-08-08 | Anritsu Corporation | Laser absorption spectral diffraction type gas detector and method for gas detection using laser absorption spectral diffraction |
| CN1439880A (en) * | 2003-01-21 | 2003-09-03 | 中国科学院安徽光学精密机械研究所 | Method and apparatus for real time remote determining multiple pollutants in vehicle exhaust |
| CN2695957Y (en) * | 2003-11-14 | 2005-04-27 | 上海波汇通信科技有限公司 | Differential absorption fibre-optical methane gas sensor |
| CN101460829A (en) * | 2006-04-19 | 2009-06-17 | 光学传感公司 | Measuring water vapor in hydrocarbons |
| CN102495021A (en) * | 2011-12-12 | 2012-06-13 | 山东大学 | System and method for detecting trace amount of steam based on two absorption peaks |
| JP2014119323A (en) * | 2012-12-14 | 2014-06-30 | Mitsubishi Heavy Ind Ltd | Gas leakage detection system |
| CN104007069A (en) * | 2014-05-20 | 2014-08-27 | 中国科学院合肥物质科学研究院 | Differential optical absorption spectroscopy measurement system based on off-axis paraboloid mirror |
Non-Patent Citations (2)
| Title |
|---|
| 叶丛雷等: "广州市交通主干道空气中苯系物的测量", 《环境科学》 * |
| 陈晓虎: "燃烧排放烟气监测的差分吸收光谱技术理论分析与实验研究", 《中国优秀博硕士学位论文全文数据库（硕士）工程科技Ⅰ辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918439A (en) * | 2015-11-10 | 2018-11-30 | 上海禾赛光电科技有限公司 | Machine-carried type indoor gas telemetry system and method |
| CN108918439B (en) * | 2015-11-10 | 2020-11-03 | 上海禾赛科技股份有限公司 | Airborne indoor gas remote measuring system and method |
| CN108918441A (en) * | 2015-11-25 | 2018-11-30 | 上海禾赛光电科技有限公司 | A kind of gas remote measurement method and device |
| CN108918441B (en) * | 2015-11-25 | 2020-11-03 | 上海禾赛科技股份有限公司 | Gas remote measuring method and device |
| CN106018314A (en) * | 2016-06-30 | 2016-10-12 | 杭州泽天科技有限公司 | Multi-band multi-gas detection device and method |
| CN109100317A (en) * | 2018-09-11 | 2018-12-28 | 杭州因诺维新科技有限公司 | Photo-electric gas monitoring system and method |
| CN114324209A (en) * | 2021-12-29 | 2022-04-12 | 杭州谱育科技发展有限公司 | Fluid detection device and method based on absorption spectrum technology |
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