CN111157470A - Method for simultaneously measuring contents of multi-component gases on line by multiple lasers - Google Patents
Method for simultaneously measuring contents of multi-component gases on line by multiple lasers Download PDFInfo
- Publication number
- CN111157470A CN111157470A CN202010010245.8A CN202010010245A CN111157470A CN 111157470 A CN111157470 A CN 111157470A CN 202010010245 A CN202010010245 A CN 202010010245A CN 111157470 A CN111157470 A CN 111157470A
- Authority
- CN
- China
- Prior art keywords
- gas
- laser
- chamber
- concave reflector
- air chamber
- 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
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000007789 gas Substances 0.000 title claims description 236
- 239000004065 semiconductor Substances 0.000 claims abstract description 33
- 238000005259 measurement Methods 0.000 claims abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 16
- 239000003345 natural gas Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 5
- 230000003287 optical effect Effects 0.000 description 5
- 238000000862 absorption spectrum Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- 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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N2021/3129—Determining multicomponents by multiwavelength light
Abstract
The invention discloses a method for simultaneously measuring the content of multi-component gas on line by multiple lasers, wherein a measuring structure of the method comprises a gas A laser collimating lens, a gas A semiconductor laser, a gas A laser detector, a gas B laser collimating lens, a gas B semiconductor laser, a gas B laser detector, a gas chamber upper end concave reflector, a gas chamber bottom concave reflector, a gas chamber gas outlet, a gas chamber gas inlet interface and a window. The method for simultaneously measuring the content of the multi-component gas on line by the multi-laser improves the traditional structure that one gas chamber is matched with one laser, can form multiple groups of independent light beams in one cavity, realizes the on-line simultaneous measurement of the multi-component gas, greatly saves the manufacturing cost compared with the traditional structure that a plurality of gas chambers are connected in series and in parallel, and has shorter response time compared with the structure that a plurality of gas chambers are connected in series and in parallel under the condition that the flow rate of the measured gas is certain.
Description
Technical Field
The invention relates to the technical field of petrochemical and natural gas, in particular to a structural method for simultaneously measuring multi-component gas in natural gas by a single-gas-chamber multi-laser based on an adjustable semiconductor laser absorption spectrum technology.
Background
The gas chromatography uses the different distribution coefficients of each component in the sample between gas phase and fixed liquid phase, when the vaporized sample is carried into the chromatographic column by carrier gas to run, the components are repeatedly distributed between two phases, because the adsorption or dissolution capacities of the fixed relative components are different, the running speeds of the components in the chromatographic column are different, after a certain column length, the components are separated from each other and leave the chromatographic column in sequence to enter a detector, the generated ion current signals are amplified and then the chromatographic peaks of the components are described on a recorder, the gas chromatography needs carrier gas, and the defects of incapability of realizing real-time online measurement, slow corresponding time and the like exist.
The absorption spectrum technology of the TDLAS adjustable semiconductor laser device is characterized in that the output wavelength of the semiconductor laser device is tuned through current and temperature, a certain absorption spectrum line of a measured substance is scanned, the concentration of the measured substance is obtained through detecting the absorption intensity of the absorption spectrum, TDLAS detects the number of molecules of laser passing through a gas channel to be measured, and the obtained gas concentration is the average concentration of the whole channel. However, in general, a laser with a specific wavelength can only measure one gas component, so that when two or more gas components are measured, a plurality of measuring gas chambers are required to form a series or parallel structure, and the manufacturing cost and the measuring response time are increased indirectly.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for simultaneously measuring the content of multi-component gas on line by multiple lasers, which solves the problems that the prior method needs a plurality of measuring gas chambers to form a series or parallel structure when measuring two or more gas components, and the manufacturing cost and the measuring response time are indirectly increased.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the measuring structure of the method comprises a gas A laser collimating lens, a gas A semiconductor laser, a gas A laser detector, a gas B laser collimating lens, a gas B semiconductor laser, a gas B laser detector, a gas chamber upper end concave reflector, a gas chamber bottom concave reflector, a gas chamber gas outlet, a gas chamber gas inlet interface and a window, wherein the gas chamber upper end concave reflector is fixedly arranged at the top of the inner wall of the gas chamber, the gas chamber bottom concave reflector is fixedly arranged at the bottom of the inner wall of the gas chamber, and the gas chamber gas outlet and the gas chamber gas inlet interface are both arranged at one side of the gas chamber.
The measuring method specifically comprises the following steps:
s1, firstly, allowing natural gas to be detected to enter from the gas inlet interface of the gas chamber through laser, and allowing the natural gas to flow out from the gas outlet of the gas chamber to fill the gas to be detected in the gas chamber;
s2, after the gas A semiconductor laser emits light with the speed a, the light is collimated by the collimating lens of the gas A laser and then enters the gas chamber through the window;
s3, reflecting the laser back and forth between the concave reflector at the upper end of the air chamber and the concave reflector at the bottom of the air chamber for a plurality of times, then sending the laser signal out of the window to the laser detector of the gas A, processing the laser signal by a processing circuit, and calculating the content of the gas A in the gas to be measured;
s4, after the gas B semiconductor laser emits light speed B, the light speed B is collimated by the collimating lens of the gas B laser and enters the gas chamber through the window;
and S5, reflecting the laser back and forth between the concave reflector at the upper end of the air chamber and the concave reflector at the bottom of the air chamber for a plurality of times, then sending the laser signal out of the window to the laser detector of the gas A, and processing the laser signal by the processing circuit to calculate the content of the gas A in the gas to be detected.
Preferably, the gas a laser collimating lens is configured to collimate laser light with a large divergence angle emitted by the laser, and the gas B laser collimating lens is configured to collimate laser light with a large divergence angle emitted by the laser.
Preferably, the gas a semiconductor laser and the gas B semiconductor laser are both for providing semiconductor laser signals.
Preferably, the gas a laser detector and the gas B laser detector are both used for receiving semiconductor laser signals.
Preferably, the concave reflector at the upper end of the air chamber is used for the light beam a to enter the air chamber cavity and reflect the light beam, and the concave reflector at the bottom of the air chamber is used for the light beam b to enter the air chamber cavity and reflect the light beam.
Preferably, the gas chamber is used for storing flowing gas to be detected, and the gas chamber is a herroitt long-optical-path gas chamber.
Preferably, the air outlet of the air chamber is used for the gas to be detected to flow out of the air chamber, and the air inlet interface of the air chamber is used for the gas to be detected to flow into the air chamber.
Preferably, the number of the windows is two, the two windows are respectively positioned at the top and the bottom of the air chamber, and the windows are used for sealing the air chamber and enabling the light path to enter the air chamber.
(III) advantageous effects
The invention provides a method for simultaneously measuring the content of multi-component gas on line by multiple lasers. Compared with the prior art, the method has the following beneficial effects: the method for simultaneously measuring the content of the multi-component gas on line by the multi-laser comprises a gas A laser collimating lens, a gas A semiconductor laser, a gas A laser detector, a gas B laser collimating lens, a gas B semiconductor laser, a gas B laser detector, a gas chamber upper end concave reflector, a gas chamber bottom concave reflector, a gas chamber gas outlet, a gas chamber gas inlet interface and a window, wherein the gas chamber upper end concave reflector is fixedly arranged at the top of the inner wall of the gas chamber, the gas chamber bottom concave reflector is fixedly arranged at the bottom of the inner wall of the gas chamber, and the gas chamber gas outlet and the gas chamber gas inlet interface are both arranged at one side of the gas chamber, so that the traditional structural method of matching one gas chamber with one laser by a plurality of lasers is improved, a plurality of groups of independent light beams can be formed in one cavity, and the on-line simultaneous, compared with the traditional structure with a plurality of gas chambers connected in series and in parallel, the gas flow velocity measuring device greatly saves the manufacturing cost, and under the condition that the measured gas flow velocity is certain, the response time of the gas flow velocity measuring device is shorter than that of the structure with a plurality of gas chambers connected in series and in parallel.
Drawings
FIG. 1 is a schematic view of a measurement configuration of the present invention;
FIG. 2 is a diagram of a structural solution simulation of the present invention;
FIG. 3 is a diagram of the spots on the lower concave mirror of the present invention.
In the figure, a 1 gas A laser collimating lens, a 2 gas A semiconductor laser, a 3 gas A laser detector, a 4 gas B laser collimating lens, a 5 gas B semiconductor laser, a 6 gas B laser detector, a 7 gas chamber upper end concave reflector, an 8 gas chamber bottom concave reflector, a 9 gas chamber, a 10 gas chamber gas outlet, a 11 gas chamber gas inlet interface and a 12 window.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, an embodiment of the present invention provides a technical solution: a method for simultaneously measuring the content of multi-component gas on line by multiple lasers comprises a gas A laser collimating lens 1, a gas A semiconductor laser 2, a gas A laser detector 3, a gas B laser collimating lens 4, a gas B semiconductor laser 5, a gas B laser detector 6, a gas chamber upper end concave reflector 7, a gas chamber bottom concave reflector 8, a gas chamber 9, a gas chamber gas outlet 10, a gas chamber gas inlet interface 11 and a window 12, wherein the gas chamber upper end concave reflector 7 is fixedly arranged at the top of the inner wall of the gas chamber 9, the gas chamber bottom concave reflector 8 is fixedly arranged at the bottom of the inner wall of the gas chamber 9, the gas chamber gas outlet 10 and the gas chamber gas inlet interface 11 are both arranged at one side of the gas chamber 9, the gas A laser collimating lens 1 is used for collimating laser emitted by the lasers with large divergence angles, and the gas B laser collimating lens 4 is used for collimating laser emitted by the lasers with large divergence angles, the gas A semiconductor laser 2 and the gas B semiconductor laser 5 are used for providing semiconductor laser signals, the gas A laser detector 3 and the gas B laser detector 6 are used for receiving the semiconductor laser signals, the concave reflector 7 at the upper end of the gas chamber is used for enabling a light beam a to enter a cavity of the gas chamber 9 and enabling the light beam to be reflected, the concave reflector 8 at the bottom of the gas chamber is used for enabling a light beam B to enter the cavity of the gas chamber 9 and enabling the light beam to be reflected, the gas chamber 9 is used for storing flowing gas to be detected, the gas chamber 9 is a herroitt long-optical-path gas chamber, the gas chamber gas outlet 10 is used for enabling the gas to flow out of the gas chamber 9 to be detected, the gas chamber air inlet interface 11 is used for enabling the gas to be detected to flow into the gas chamber 9, the number of the windows 12.
The measuring method specifically comprises the following steps:
s1, firstly, allowing natural gas to be detected to enter from the gas inlet interface 11 of the gas chamber through laser, and then allowing the natural gas to flow out from the gas outlet 10 of the gas chamber to fill the gas to be detected in the gas chamber 9;
s2, after the gas A semiconductor laser 2 emits light with the speed a, the light is collimated by the gas A laser collimating lens 1 and then enters the gas chamber 9 through the window 12;
s3, reflecting the laser back and forth between the concave reflector 7 at the upper end of the air chamber and the concave reflector 8 at the bottom of the air chamber for a plurality of times, then sending the laser out of the window 12 to the laser detector 3 of the gas A, processing the laser signal by a processing circuit, and calculating the content of the gas A in the gas to be measured;
s4, after the gas B semiconductor laser 5 emits light with the speed B, the light is collimated by the gas B laser collimating lens 4 and enters the gas chamber 9 through the window 12;
and S5, reflecting the laser back and forth between the concave reflector 7 at the upper end of the air chamber and the concave reflector 8 at the bottom of the air chamber for a plurality of times, then emitting the laser out of the window 12 to the laser detector 3 for the gas A, and processing the laser signal by the processing circuit to calculate the content of the gas A in the gas to be measured.
The invention is based on Herriott type multiple optical path pool, its core part is Herriott type portable multiple optical path pool, Herriott type portable multiple optical path structure of pool, wherein the concave reflector 7 of upper end of air chamber and concave reflector 8 of bottom of air chamber coincide each other and its focus is on a straight line, the focal length of both mirrors is f, the mirror interval is d, incident beam a is from the small round hole of concave reflector 7 of upper end of air chamber and incident, reflect and emerge from the round hole again after many times of cycle, form a stability chamber of cycle reflection, incident beam b is incident from the small round hole of concave reflector 8 of bottom of air chamber, reflect and emerge from the round hole again after many times of cycle, form another stability chamber of cycle reflection.
The laser stabilization cavity conditions are as follows: COS theta 1-d/2f
θ: is the angle between two successive reflections;
d: the distance between two concave mirrors;
f: the focal length of the concave mirror.
The conditions for the laser energy to exit from the entrance hole are: n theta 2M pi
N: is the total number of passes of the beam in the cell, which is even;
m: an integer number.
The condition that the two light paths do not interfere is as follows:
the distance L1 from the light path incident hole of the concave reflector 7 at the upper end of the air chamber 9 to the circular shape of the mirror surface, the distance L2 from the light path incident hole of the concave reflector 8 at the bottom of the air chamber to the circular shape of the mirror surface, L1 is not equal to L2.
For the concave reflector with fixed focal length, the inner and outer layer long optical path gas chamber 9 structure can be realized by calculating and adjusting the distance d between the two reflectors, and the simulation structure is shown in fig. 2.
The light spot on the concave reflector 8 at the bottom of the air chamber is shown in figure 3: beam a is reflected 66 times, beam b is reflected 66 times at path 20.6m, and path 20.1 m.
Note that:
1. the lasers at the two ends of the gas chamber 9 can be changed according to different measuring gases;
2. the distance L1 from the light path incident hole of the concave reflector 7 at the upper end of the air chamber to the circular shape of the mirror surface and the distance L2 from the light path incident hole of the concave reflector 8 at the bottom of the air chamber to the circular shape of the mirror surface can be changed;
3. concave mirrors of different focal lengths may be used;
4. different reflection times and different optical paths can be realized;
5. even more simultaneous measurements of three lasers can be achieved if the installation space allows.
To sum up the above
The invention can realize the structural method of matching a plurality of lasers with one gas chamber 9, improves the traditional structure of matching one gas chamber 9 with one laser, can form a plurality of groups of independent light beams in one cavity, realizes the on-line simultaneous measurement of a plurality of gas components, greatly saves the manufacturing cost compared with the traditional structure of connecting a plurality of gas chambers 9 in series and parallel, and has shorter response time compared with the structure of connecting a plurality of gas chambers 9 in series and parallel under the condition of certain flow rate of the measured gas.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A method for simultaneously measuring the content of multi-component gas on line by multiple lasers is characterized in that: the measuring structure comprises a gas A laser collimating lens (1), a gas A semiconductor laser (2), a gas A laser detector (3), a gas B laser collimating lens (4), a gas B semiconductor laser (5), a gas B laser detector (6), a gas chamber upper end concave reflector (7), a gas chamber bottom concave reflector (8), a gas chamber (9), a gas chamber gas outlet (10), a gas chamber gas inlet interface (11) and a window (12), wherein the gas chamber upper end concave reflector (7) is fixedly arranged at the top of the inner wall of the gas chamber (9), the gas chamber bottom concave reflector (8) is fixedly arranged at the bottom of the inner wall of the gas chamber (9), and the gas chamber gas outlet (10) and the gas chamber gas inlet interface (11) are both arranged at one side of the gas chamber (9);
the measuring method specifically comprises the following steps:
s1, firstly, allowing natural gas to be detected to enter from the gas inlet interface (11) of the gas chamber through laser, and allowing the natural gas to flow out from the gas outlet (10) of the gas chamber to fill the gas to be detected in the gas chamber (9);
s2, after the gas A semiconductor laser (2) emits light speed a, the light speed a is collimated by the gas A laser collimating lens (1), and then enters the gas chamber (9) through the window (12);
s3, reflecting the laser back and forth between the concave reflector (7) at the upper end of the air chamber and the concave reflector (8) at the bottom of the air chamber for a plurality of times, then sending the laser signal out of the window (12) to the laser detector (3) of the gas A, processing the laser signal by a processing circuit, and calculating the content of the gas A in the gas to be detected;
s4, after the gas B semiconductor laser (5) emits light speed B, the light speed B is collimated by the gas B laser collimating lens (4) and enters the gas chamber (9) through the window (12);
s5, reflecting the laser back and forth between the concave reflector (7) at the upper end of the air chamber and the concave reflector (8) at the bottom of the air chamber for a plurality of times, then sending the laser out of the window (12) to the laser detector (3) of the gas A, processing the laser signal by the processing circuit, and calculating the content of the gas A in the gas to be measured.
2. The method for the simultaneous on-line measurement of the contents of the multi-component gases by the multiple lasers according to claim 1, wherein the method comprises the following steps: the gas A laser collimating lens (1) is used for collimating laser with a large divergence angle emitted by a laser, and the gas B laser collimating lens (4) is used for collimating laser with a large divergence angle emitted by a laser.
3. The method for the simultaneous on-line measurement of the contents of the multi-component gases by the multiple lasers according to claim 1, wherein the method comprises the following steps: the gas A semiconductor laser (2) and the gas B semiconductor laser (5) are used for providing semiconductor laser signals.
4. The method for the simultaneous on-line measurement of the contents of the multi-component gases by the multiple lasers according to claim 1, wherein the method comprises the following steps: and the gas A laser detector (3) and the gas B laser detector (6) are used for receiving semiconductor laser signals.
5. The method for the simultaneous on-line measurement of the contents of the multi-component gases by the multiple lasers according to claim 1, wherein the method comprises the following steps: the concave reflector (7) at the upper end of the air chamber is used for enabling the light beam a to enter the cavity of the air chamber (9) and reflecting the light beam, and the concave reflector (8) at the bottom of the air chamber is used for enabling the light beam b to enter the cavity of the air chamber (9) and reflecting the light beam.
6. The method for the simultaneous on-line measurement of the contents of the multi-component gases by the multiple lasers according to claim 1, wherein the method comprises the following steps: the gas chamber (9) is used for storing flowing gas to be detected, and the gas chamber (9) is a herroitt long-optical-path gas chamber.
7. The method for the simultaneous on-line measurement of the contents of the multi-component gases by the multiple lasers according to claim 1, wherein the method comprises the following steps: the air chamber air outlet (10) is used for allowing the gas to be detected to flow out of the air chamber (9), and the air chamber air inlet interface (11) is used for allowing the gas to be detected to flow into the air chamber (9).
8. The method for the simultaneous on-line measurement of the contents of the multi-component gases by the multiple lasers according to claim 1, wherein the method comprises the following steps: the number of the windows (12) is two, the two windows (12) are respectively positioned at the top and the bottom of the air chamber (9), and the windows (12) are used for sealing the air chamber (9) and enabling the light path to enter the air chamber (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010010245.8A CN111157470A (en) | 2020-01-06 | 2020-01-06 | Method for simultaneously measuring contents of multi-component gases on line by multiple lasers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010010245.8A CN111157470A (en) | 2020-01-06 | 2020-01-06 | Method for simultaneously measuring contents of multi-component gases on line by multiple lasers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111157470A true CN111157470A (en) | 2020-05-15 |
Family
ID=70561581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010010245.8A Pending CN111157470A (en) | 2020-01-06 | 2020-01-06 | Method for simultaneously measuring contents of multi-component gases on line by multiple lasers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111157470A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735784A (en) * | 2020-06-30 | 2020-10-02 | 北京师范大学 | Method for determining formation of linear light spots in multi-gas-reaction chamber, method for determining testing of multiple gases in multi-gas-reaction chamber and multi-gas-reaction chamber |
| CN114166795A (en) * | 2021-11-16 | 2022-03-11 | 山西祎恒光电科技有限公司 | Multi-channel pool construction method shared by multi-wavelength lasers |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1659428A (en) * | 2002-09-06 | 2005-08-24 | Tdw特拉华有限公司 | Device and method for detecting gases by absorption spectroscopy |
| CN104914058A (en) * | 2015-05-26 | 2015-09-16 | 中国科学院长春光学精密机械与物理研究所 | Multi-component trace gas concentration measuring apparatus |
| US20180202926A1 (en) * | 2017-01-19 | 2018-07-19 | Cascade Technologies Holdings Limited | Close-coupled analyser |
| CN109765184A (en) * | 2019-01-16 | 2019-05-17 | 深圳供电局有限公司 | Optical gas absorbance pond and optical gas detection system |
-
2020
- 2020-01-06 CN CN202010010245.8A patent/CN111157470A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1659428A (en) * | 2002-09-06 | 2005-08-24 | Tdw特拉华有限公司 | Device and method for detecting gases by absorption spectroscopy |
| CN104914058A (en) * | 2015-05-26 | 2015-09-16 | 中国科学院长春光学精密机械与物理研究所 | Multi-component trace gas concentration measuring apparatus |
| US20180202926A1 (en) * | 2017-01-19 | 2018-07-19 | Cascade Technologies Holdings Limited | Close-coupled analyser |
| CN109765184A (en) * | 2019-01-16 | 2019-05-17 | 深圳供电局有限公司 | Optical gas absorbance pond and optical gas detection system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735784A (en) * | 2020-06-30 | 2020-10-02 | 北京师范大学 | Method for determining formation of linear light spots in multi-gas-reaction chamber, method for determining testing of multiple gases in multi-gas-reaction chamber and multi-gas-reaction chamber |
| CN114166795A (en) * | 2021-11-16 | 2022-03-11 | 山西祎恒光电科技有限公司 | Multi-channel pool construction method shared by multi-wavelength lasers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7064836B2 (en) | Brewster's angle flow cell for cavity ring-down spectroscopy | |
| US7777887B2 (en) | Absorption spectroscopy apparatus and method | |
| US7259374B2 (en) | Method for detecting a gas species using a super tube waveguide | |
| US11828682B2 (en) | Integrated illumination-detection flow cell for liquid chromatography | |
| US20080035848A1 (en) | Ultra-high sensitivity NDIR gas sensors | |
| US7215428B2 (en) | Absorption spectroscopy apparatus and method | |
| JPH09222392A (en) | Polygonal plane plural passage cell and system, device having them, and usage with them | |
| CN107345904B (en) | Method and device for detecting gas concentration based on optical absorption and interferometry | |
| US20130188170A1 (en) | Optical absorption spectroscopy | |
| JPH05503352A (en) | Gas detector using infrared rays | |
| RU2018139645A (en) | MULTI-WAY CUVET FOR SAMPLE | |
| EP0670486B1 (en) | Spectroscopic measuring sensor for the analysis of mediums | |
| CN111157470A (en) | Method for simultaneously measuring contents of multi-component gases on line by multiple lasers | |
| CN110632013A (en) | Gas spectrum analyzer | |
| US20020185603A1 (en) | Absorption spectroscopy apparatus and method | |
| CN111948157B (en) | Long-optical-path tunable absorption cell and emergent light beam acquisition method thereof | |
| CN108132229B (en) | TDLAS transformer oil dissolved gas composition measurement system based on time division multiplexing | |
| CN211697465U (en) | Optical absorption cell and photoelectric gas analyzer | |
| US7755767B2 (en) | Resonator-amplified absorption spectrometer | |
| KR101108497B1 (en) | NDIR Gas Sensor | |
| JP6769454B2 (en) | Gas analyzer | |
| CN110736713B (en) | Gas analyzer and gas analyzing method | |
| US10884225B2 (en) | Highly-folding pendular optical cavity | |
| WO2012142549A1 (en) | Laser multi-pass system with cell inside for spectroscopic measurements | |
| CN211478058U (en) | Gas spectrum analyzer |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200515 |
|
| RJ01 | Rejection of invention patent application after publication |