CN109164054A - Carbon dioxide concentration measurement scaling system device - Google Patents
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- CN109164054A CN109164054A CN201811190915.8A CN201811190915A CN109164054A CN 109164054 A CN109164054 A CN 109164054A CN 201811190915 A CN201811190915 A CN 201811190915A CN 109164054 A CN109164054 A CN 109164054A
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- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 165
- 238000005259 measurement Methods 0.000 title claims abstract description 58
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 21
- 238000010521 absorption reaction Methods 0.000 claims abstract description 118
- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000000862 absorption spectrum Methods 0.000 claims description 33
- 230000003362 replicative effect Effects 0.000 claims description 22
- 239000000523 sample Substances 0.000 claims description 15
- 238000002474 experimental method Methods 0.000 claims description 14
- 230000010287 polarization Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 230000009897 systematic effect Effects 0.000 claims 1
- 230000010354 integration Effects 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract description 3
- 230000006012 detection of carbon dioxide Effects 0.000 abstract 1
- 238000011056 performance test Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 88
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- RNLHGQLZWXBQNY-UHFFFAOYSA-N 3-(aminomethyl)-3,5,5-trimethylcyclohexan-1-amine Chemical compound CC1(C)CC(N)CC(C)(CN)C1 RNLHGQLZWXBQNY-UHFFFAOYSA-N 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008685 targeting Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- 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
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Abstract
本发明公开了一种二氧化碳浓度测量定标系统装置，包括分光及能量检测单元，CO2气体吸收池，光路折转结构、气体池池温控制系统及气体池气压检测系统、抽真空系统和CO2充气系统，根据激光雷达高精度探测二氧化碳浓度的需求，可对吸收池内CO2浓度和压力进行精密控制和测量，在地面实现星载CO2浓度测量积分路径的模拟，从而完成星载激光雷达系统在实验室环境下CO2浓度测量精度的定标工作。在实验室环境下检测星载激光雷达CO2浓度探测灵敏度。通过吸收池中的各种参数调整和测量，更加有效地在实验室完成激光雷达系统的性能测试和定标工作。
The invention discloses a carbon dioxide concentration measurement and calibration system device, comprising a spectroscopic and energy detection unit, a CO2 gas absorption cell, an optical path turning structure, a gas pool temperature control system, a gas pool pressure detection system, a vacuum pumping system and a CO 2 Inflatable system, according to the requirements of high-precision detection of carbon dioxide concentration by lidar, it can precisely control and measure the concentration and pressure of CO2 in the absorption tank, and realize the simulation of the integration path of spaceborne CO2 concentration measurement on the ground, thus completing the spaceborne lidar The calibration work of the system in the measurement accuracy of CO 2 concentration in the laboratory environment. Detecting the CO 2 concentration detection sensitivity of spaceborne lidar in laboratory environment. Through the adjustment and measurement of various parameters in the absorption cell, the performance test and calibration of the lidar system can be more effectively completed in the laboratory.
Description
Technical field
Wish to reach high-acruracy survey CO the invention belongs to atmospheric laser radar field, especially satellite-bone laser radar2It is dense
In the case where degree, need in laboratory environments to satellite-bone laser radar CO2Column measurement of concetration accuracy and sensitivity is calibrated.
Background technique
As the harm of global warming is increasingly significant, the research of greenhouse gases is become more and more important.CO2As main
Greenhouse gases, to Atmospheric CO2The monitoring of concentration has received widespread attention.Path of integration Difference Absorption (IPDA) laser radar
It is realized from space using the reflection or scattering of hard goal to Atmospheric CO2The detected with high accuracy of column concentration.Path of integration Difference Absorption
The measuring principle of radar is the absorption difference by gas in path of integration to different wavelengths of light, obtains gas using differential signal
Concentration information.Before laser radar carries out spaceborne operation, need under ground experiment room environmental to its CO2Column measurement of concetration essence
Degree and sensitivity are calibrated.When carrying out field testing, gas concentration lwevel is easy the interference by mankind's activity and air-flow,
Cause gas concentration lwevel to be unevenly distributed, lidar measurement precision can not accurately be verified, while satellite borne laser thunder
It is high for working environment purity requirements up to system, it cannot be exposed to the atmosphere.It is dedicated it is therefore desirable to be used in laboratory
Targeting device verifies lidar measurement CO2Concentration accuracy and sensitivity.
Summary of the invention
It is an object of the present invention to provide a kind of carbon dioxide concentration measurement scaling system device, which can be in laboratory item
Under part, the differential optical thickness of satellite borne laser path of integration is simulated, to lidar measurement CO2The precision of concentration is calibrated,
Unified Laboratory Calibration measurement standard can be provided by providing convenient and experimental result for scaling experiment.
Basic principle of the invention is to calculate corresponding satellite-bone laser radar CO based on IPDA technology2Differential optical thickness feelings
Pure CO needed under condition2Concentration and required integration path lengths.Utilize CO2Fill exhaust equipment and temperature control system high-precision
Control CO in absorption cell2Air pressure and temperature obtain CO identical with Space-borne situation2Differential optical thickness is absorbed, to simulate
Spaceborne CO2Column concentration.Laser issue light obtained after this system echo-signal identical with spaceborne situation and simulation
Spaceborne CO2Therefore column concentration is it is known that quantitatively change CO in pond2Gas concentration can calibrate the detection accuracy of laser radar and sensitive
Degree.
The technology of the present invention solution is as follows:
A kind of carbon dioxide concentration measurement scaling system device, it is characterized in that, including light splitting and energy detection unit, the
One CO2Gas absorption cell, optical path replicating structure and the 2nd CO2Gas absorption cell；
First CO2Gas absorption cell passes through optical path replicating structure and the 2nd CO2Gas absorption cell is connected, and is formed close
The absorption cell of envelope is whole；
The light splitting and energy detection unit is located at the first CO2In front of gas absorption cell optical window, by laser radar
Transmitting light point takes part energy to be detected and decayed, and remainder energy enters the first CO2Gas absorption cell；
The optical path replicating structure is for adjusting optical path length, and the first CO of adjustment2Gas absorption cell (2) and second
CO2The distance between gas absorption cell, to guarantee that the emergent light of light splitting and energy detection unit can enter the first CO2Gas absorbs
Pond, and the 2nd CO2The outgoing luminous energy of gas absorption cell receives system by laser radar and receives；
In the first CO2Gas absorption cell or the 2nd CO2Gas cell pond temperature control system is installed on the outer wall of gas absorption cell
System, gas cell Measurement System of Air Pressure, pumped vacuum systems and CO2Inflation system, the gas cell pond temperature control system is to suction
Gas temperature is controlled in receives pond entirety, gas cell Measurement System of Air Pressure, pumped vacuum systems and the CO2Inflation system group
At CO2Exhaust total system is filled, is vacuumized for absorption cell whole interior and CO2Pressure control.
It further include CO2Absorption spectrum measuring system and reflector are used for CO2CO in pond before measurement of concetration scaling experiment2
Absorption spectrum measurement；
CO2When absorption spectrum measurement experiment, CO2Absorption spectrum measuring system emits adjustable frequency light, by the 2nd CO2Gas
Body absorption cell, optical path replicating structure and the first CO2After gas absorption cell, after being reflected by reflector, successively through described first
CO2Gas absorption cell, optical path replicating structure and the 2nd CO2Backtracking is to CO after gas absorption cell2Absorption spectrum measuring system.
The light splitting and energy detection unit include the first reflecting mirror, the second reflecting mirror, spectroscope, the first attenuator,
First energy-probe, the second attenuator；
First reflecting mirror and the second reflecting mirror, for reflecting and translating laser radar transmitting light；Second reflecting mirror
Emit light level position for adjusting, allows to enter the first CO2Gas absorption cell optical window；
Incident light is incident on the second reflecting mirror after the reflection of the first reflecting mirror, after the reflection of the second reflecting mirror, is incident on point
Light microscopic is divided into reflected light and transmitted light through the spectroscope, and the reflected light enters the first energy after the first attenuator and visits
Device is surveyed, the transmitted light enters the first CO after the second attenuator2Gas absorption cell.
The optical path replicating structure includes reflecting mirror I and reflecting mirror II, including reflecting mirror I and reflecting mirror II, reflecting mirror I
With reflecting mirror II for optical path of turning back.
The CO2Absorption spectrum measuring system includes Frequency Adjustable light source, light source frequency scanning controller, collimating mirror, polarization point
Light prism, quarter-wave plate, the second energy-probe；
The Frequency Adjustable light source is located at collimating mirror focal point, the light source frequency scanning controller and Frequency Adjustable light source phase
Even, for adjusting Frequency Adjustable source emissioning light frequency, the light of transmitting is expanded by collimating mirror as directional light, through polarization splitting prism
Transmitted light after quarter-wave plate enter the 2nd CO2Gas absorption cell；
First CO2After the emergent light of gas absorption cell is reflected by reflector, successively through the first CO2Gas absorption cell and
Optical path replicating structure is incident on the 2nd CO2Gas absorption cell, through the 2nd CO2The emergent light of gas absorption cell is through quarter-wave
It is reflected after piece transmission by polarization splitting prism, into the second energy-probe.
Carry out CO2When measurement of concetration scaling experiment, CO2Absorption spectrum measuring system reflector does not work.Carry out CO2It absorbs
When spectral measurement, laser radar does not work.
Laser radar transmitting light is split using light splitting and energy detection unit, carries out energy using a portion light
Amount detection, and at the same time adjustable emergent light horizontal position, makes laser radar emit light into the first CO2Gas absorption cell.
First CO2Gas absorption cell, optical path replicating structure and the 2nd CO2Gas absorption cell forms biabsorption pool structure, can be with
The light for emitting laser radar laser is received system reception after absorption cell.Light unidirectionally passes in biabsorption pool structure
It broadcasts, avoids the error that light roundtrip in absorption cell interferes with each other generation.
Gas cell pond temperature control system, gas cell Measurement System of Air Pressure, pumped vacuum systems and CO2Inflation system can be accurate
The first CO of control and measurement2Gas absorption cell, optical path replicating structure and the 2nd CO2In the absorption cell entirety of gas absorption cell composition
Temperature and the CO that is filled with2Air pressure, to accurately simulate the titanium dioxide of entire atmosphere height layer under Space-borne equivalent condition
Carbon absorption optical thickness.By changing air pressure and temperature parameter in absorption cell, reach the spaceborne CO of equivalent simulation2Optical thickness changes
The requirement of change measures CO to laser radar system2Concentration precision is calibrated.
CO is measured in calibration laser radar system2Before concentration precision, CO is utilized2Absorption spectrum measuring system and reflector
To the CO in pond2Absorption spectrum measures, and calculates relevant Absorption Line parameter to optical thickness for the later period and is corrected.
Laser radar carries out CO using 1572nm light2When concentration is calibrated, the first CO2Gas absorption cell and the 2nd CO2
Gas absorption cell is 7.5m, and bore is greater than 250mm.First CO2Gas absorption cell, optical path replicating structure and the 2nd CO2Gas is inhaled
The absorption cell entirety vacuum-pumping of receives pond composition, vacuum degree are better than 1x10-3Pa。
The gas cell Measurement System of Air Pressure pressure measurement accuracy is better than 1mbar, CO2Inflation system pressure controling precision
Higher than 2mbar.
The gas cell pond temperature control system temperature controlling range is 20-40 DEG C, and accuracy of temperature control is better than 1 DEG C.With it is existing
Technology is compared, the present invention has the advantages that
1 can complete the scaling experiment of laser radar system measurement accuracy in laboratory, ungentle by mankind's activity
The interference of stream avoids the various uncertain factors and environmental pollution of field testing.Not by the constraint in experiment place, can save
Because of time spent by the demand of these experimental sites and environment, goods and materials.
2 can in laboratory temperature and gas concentration lwevel and pressure in autonomous high-precision control absorption cell according to demand
Power, step simple operations are convenient, and controllability is strong.
The parameter of each component of 3 present apparatus can set up a unified CO2Concentration Testing standard has repeatability, is
The detection of laser radar and Performance Evaluation provide a better application environment.
Detailed description of the invention
Fig. 1 is carbon dioxide concentration measurement scaling system apparatus structure block diagram of the present invention.
In figure: 1-light splitting and energy detection unit, the 2-the one CO2Gas absorption cell, 3-optical paths turnover adjustment mechanism,
4-the two CO2 gas absorption cell, 5-gas cell pond temperature control systems, 6-gas cell Measurement System of Air Pressure, 7-, which vacuumize, is
System, 8-CO2Inflation system, 9-CO2Absorption spectrum measuring system, 10-reflectors.
Fig. 2 is the internal structure block diagram of light splitting and energy detection unit.
In figure: the first reflecting mirror of 1-1-, the second reflecting mirror of 1-2-, 1-3-spectroscope, the first attenuator of 1-4-, 1-
5-the first energy-probe, the second attenuator of 1-6-.
Fig. 3 is CO2The internal structure block diagram of absorption spectrum measuring system.
In figure: 9-1-Frequency Adjustable light source, 9-2-light source frequency scanning controller, 9-3-collimating mirror, 9-4-polarization spectro rib
Mirror, 9-5-quarter-wave plate, the second energy-probe of 9-6-.
Specific embodiment
Below with reference to embodiment and attached drawing, the invention will be further described, but protection model of the invention should not be limited with this
It encloses.Schematic diagram 1 is please referred to, Fig. 1 is that the present invention is based on the schematic diagram of carbon dioxide concentration measurement robot scaling equipment, a kind of carbon dioxide
Measurement of concetration scaling system device, including light splitting and energy detection unit, the first CO2Gas absorption cell, optical path replicating structure, the
Two CO2Gas absorption cell, gas cell pond temperature control system, gas cell Measurement System of Air Pressure, pumped vacuum systems, CO2Inflation system,
CO2Absorption spectrum measuring system, reflector.The positional relationship of above-mentioned component is as follows:
The light splitting and energy detection unit is located at the first CO2In front of gas absorption cell optical window, by laser radar
Transmitting light point takes part energy to be detected and decayed, and remainder energy enters the first CO2Gas absorption cell.Described
One CO2Gas absorption cell passes through optical path replicating structure and the 2nd CO2Gas absorption cell is connected, and the absorption cell for forming sealing is whole.Light
Road replicating structure is for adjusting optical path length, and the first CO of adjustment2Gas absorption cell and the 2nd CO2Between gas absorption cell away from
From to guarantee that the emergent light of light splitting and energy detection unit can enter the first CO2Gas absorption cell, and the 2nd CO2Gas absorbs
The outgoing luminous energy in pond receives system by laser radar and receives.The gas cell pond temperature control system, gas cell air pressure detection system
System, pumped vacuum systems and CO2Inflation system is mounted on the 2nd CO2Gas absorption cell outer wall.Gas cell pond temperature control system is to suction
Gas temperature is controlled in receives pond entirety.Gas cell Measurement System of Air Pressure, pumped vacuum systems and CO2Inflation system forms CO2
Exhaust total system is filled, is vacuumized for absorption cell whole interior and CO2Pressure control.Carry out CO2When measurement of concetration scaling experiment,
CO2Absorption spectrum measuring system reflector does not work.The CO2Absorption spectrum measuring system and reflector are used for CO2Concentration is surveyed
CO in pond before amount scaling experiment2Absorption spectrum measurement.CO2When absorption spectrum measurement experiment, CO2Absorption spectrum measuring system
Emit adjustable frequency light, by the 2nd CO2Gas absorption cell, optical path replicating structure and the first CO2It is anti-after gas absorption cell
Emitter reflection, light backtracking to CO2Absorption spectrum measuring system.Carry out CO2When absorption spectrum measures, laser radar does not work.
Fig. 2 is the internal structure block diagram of light splitting and energy detection unit, and light splitting and energy detection unit include the first reflection
Mirror, the second reflecting mirror, spectroscope, the first attenuator, the first energy-probe, the second attenuator.It closes the position of above-mentioned component
It is as follows: the first reflecting mirror and the second reflecting mirror, for reflecting and translating laser radar transmitting light.Second reflecting mirror is for adjusting
Emit light level position, allows to enter the first CO2Gas absorption cell optical window.By the position of the second reflector alignment
Afterwards, transmitting light is divided into two-way by spectroscope, and wherein reflected light enters the first energy-probe, transmission after the first attenuator
Light enters the first CO after the second attenuator2Gas absorption cell.
Fig. 3 is CO2The internal structure block diagram of absorption spectrum measuring system, CO2Absorption spectrum measuring system includes Frequency Adjustable light
Source, light source frequency scanning controller, collimating mirror, polarization splitting prism, quarter-wave plate, the second energy-probe.Above-mentioned component
Positional relationship it is as follows: Frequency Adjustable light source is located at collimating mirror focal point, and the light of transmitting is expanded by collimating mirror as directional light.Light source
Frequency scanning controller is connected with Frequency Adjustable light source, for adjusting Frequency Adjustable source emissioning light frequency.Collimating mirror expand after directional light,
By polarization splitting prism, enter the 2nd CO after quarter-wave plate2Gas absorption cell.First CO2The emergent light of gas absorption cell
It is reflected by reflector, reenters absorption cell.2nd CO2The emergent light of gas absorption cell again passes by quilt after quarter-wave plate
Polarization splitting prism reflection, into the second energy-probe.
Laser radar carries out CO using 1572nm light2When concentration is calibrated, the first CO2Gas absorption cell and the first CO2
Gas absorption cell is 7.5m, and bore is greater than 250mm.First CO2Gas absorption cell, optical path replicating structure and the 2nd CO2Gas is inhaled
The absorption cell entirety vacuum-pumping of receives pond composition, vacuum degree are better than 1x10-3Pa。
The gas cell Measurement System of Air Pressure pressure measurement accuracy is better than 1mbar, CO2Inflation system pressure controling precision
Higher than 2mbar.
The gas cell pond temperature control system temperature controlling range is 20-40 DEG C, and accuracy of temperature control is better than 1 DEG C.
Carbon dioxide concentration measurement robot scaling equipment of the present invention completes path of integration differential absorption lidar scaling experiment, tool
Steps are as follows for gymnastics work:
1. combining the definition of the measuring principle and differential optical thickness of IPDA technology can obtain:
Wherein DAOD is carbon dioxide differential optical thickness, Nco2(r) dense for the carbon dioxide gas molecular number at distance r
Degree, Δ σ are carbon dioxide gas differential absorption cross-section at distance r.Therefore measurement optical wavelength can be required and corresponded to according to calibration,
It calculates and absorbs pond length and temperature and the CO being filled with needed for absorption cell2Concentration (CO2Air pressure) come simulate satellite-bone laser radar measurement
Optical thickness.
2. gas cell Measurement System of Air Pressure, pumped vacuum systems and CO2Inflation system makes the first CO2Absorption cell and the 2nd CO2
It is first vacuumized in absorption cell, then the CO poured2Gas, so that CO in absorption cell entirety2Concentration (pressure) reaches predetermined value.
3. reaching predetermined value using gas cell temperature control system control absorption cell temperature.
4. using CO2Absorption spectrum measuring system emits Frequency Adjustable light, returns to CO after absorption cell entirety and reflector2
Absorption spectrum measuring system.Utilize CO2The second energy-probe in absorption spectrum measuring system receives the inverting of echo power energy
CO in absorption cell entirety2Absorption spectrum.
5. formally carry out carbon dioxide concentration measurement scaling experiment, laser radar system laser emits laser, passes through
Transmitting light beam is divided into two beams by light splitting and energy detection unit, and light beam injects the first energy-probe and carries out energy monitoring, prison
It measures power and is denoted as PonmAnd Poffm, another beam light emission enters the first CO2Absorption cell.
6. entering the first CO2The light of absorption cell injects the second heavy caliber CO by light turnover adjustment mechanism2Absorption cell, outgoing
Light is integrated path differential absorption lidar and receives system reception, receives echo power and is denoted as PonAnd Poff.It is transferred and is adjusted by light
Complete machine structure connects the first CO2Absorption cell and the 2nd CO2Absorption cell, the luminous energy for emitting laser radar laser are received system and connect
It receives, and the path that light back and forth is passed by is different, will not interfere with each other influence.
7. laser radar system has measured a CO2After the result of concentration, by gas cell Measurement System of Air Pressure, vacuumize
System and CO2Inflation system changes CO in carbon dioxide concentration measurement robot scaling equipment2Concentration, the precision for calibrating its knots modification
It is required that.
8. using CO2CO in absorption spectrum measuring system measuring cell2Absorption spectrum.
9. laser radar system laser emits laser again, CO in absorption cell is measured2Energy monitoring after concentration change
Signal and reception system echoes signal.
10. comparing that laser radar system measures twice as a result, judging whether laser radar system reaches the calibration precision.
Claims (7)
1. a kind of carbon dioxide concentration measurement scaling system device, which is characterized in that including light splitting and energy detection unit (1),
First CO2Gas absorption cell (2), optical path replicating structure (3) and the 2nd CO2Gas absorption cell (4)；
First CO2Gas absorption cell (2) passes through optical path replicating structure (3) and the 2nd CO2Gas absorption cell (4) is connected, shape
It is whole at the absorption cell of sealing；
The light splitting and energy detection unit (1) are located at the first CO2In front of gas absorption cell (2) optical window, by laser radar
Transmitting light point takes part energy to be detected and decayed, and remainder energy enters the first CO2Gas absorption cell (2)；
The optical path replicating structure (3) is for adjusting optical path length, and the first CO of adjustment2Gas absorption cell (2) and second
CO2The distance between gas absorption cell (4), to guarantee that the emergent light of light splitting and energy detection unit (1) can enter the first CO2Gas
Body absorption cell (2), and the 2nd CO2The outgoing luminous energy of gas absorption cell (4) receives system by laser radar and receives；
In the first CO2Gas absorption cell (2) or the 2nd CO2The temperature control of gas cell pond is installed on the outer wall of gas absorption cell (4)
System (5), gas cell Measurement System of Air Pressure (6), pumped vacuum systems (7) and CO processed2Inflation system (8), the gas cell pond
Temperature control system (5) controls gas temperature in absorption cell entirety, and the gas cell Measurement System of Air Pressure (6) is taken out very
Empty set system (7) and CO2Inflation system (8) forms CO2Exhaust total system is filled, is vacuumized for absorption cell whole interior and CO2Air pressure
Control.
2. carbon dioxide concentration measurement scaling system device according to claim 1, which is characterized in that further include CO2It absorbs
Spectral measurement system (9) and reflector (10) are used for CO2CO in pond before measurement of concetration scaling experiment2Absorption spectrum measurement；
CO2When absorption spectrum measurement experiment, CO2Absorption spectrum measuring system (9) emits adjustable frequency light, by the 2nd CO2Gas
Absorption cell (4), optical path replicating structure (3) and the first CO2After gas absorption cell (2), after reflector (10) reflection, successively pass through
First CO2Gas absorption cell (2), optical path replicating structure (3) and the 2nd CO2Backtracking arrives gas absorption cell (4) afterwards
CO2Absorption spectrum measuring system (9).
3. carbon dioxide concentration measurement scaling system device according to claim 1 or 2, which is characterized in that point
Light and energy detection unit (1) include the first reflecting mirror (1-1), the second reflecting mirror (1-2), spectroscope (1-3), the first attenuator
(1-4), the first energy-probe (1-5), the second attenuator (1-6)；
First reflecting mirror (1-1) and the second reflecting mirror (1-2), for reflecting and translating laser radar transmitting light；Second
Reflecting mirror (1-2) allows to enter the first CO for adjusting transmitting light level position2Gas absorption cell (2) optical window；
Incident light is incident on the second reflecting mirror (1-2) after the first reflecting mirror (1-1) reflection, reflects through the second reflecting mirror (1-2)
Afterwards, it is incident on spectroscope (1-3), is divided into reflected light and transmitted light through the spectroscope (1-3), the reflected light declines by first
Subtract piece (1-4) and enter the first energy-probe (1-5) afterwards, the transmitted light enters first after the second attenuator (1-6)
CO2Gas absorption cell (2).
4. carbon dioxide concentration measurement scaling system device according to claim 1 or 2, which is characterized in that the light
Road replicating structure (3) includes reflecting mirror I and reflecting mirror II, and reflecting mirror I and reflecting mirror II are for optical path of turning back.
5. carbon dioxide concentration measurement scaling system device according to claim 2, which is characterized in that the CO2It absorbs
Spectral measurement system (9) includes Frequency Adjustable light source (9-1), light source frequency scanning controller (9-2), collimating mirror (9-3), polarization spectro rib
Mirror (9-4), quarter-wave plate (9-5), the second energy-probe (9-6)；
The Frequency Adjustable light source (9-1) is located at collimating mirror (9-3) focal point, the light source frequency scanning controller (9-2) with can
Frequency modulation light source (9-1) is connected, and for adjusting Frequency Adjustable light source (9-1) transmitting light frequency, the light of transmitting expands by collimating mirror (9-3)
Beam is directional light, enters the 2nd CO after quarter-wave plate (9-5) through the transmitted light of polarization splitting prism (9-4)2Gas is inhaled
Receives pond (4)；
First CO2After the emergent light of gas absorption cell (2) is reflected by reflector (10), successively through the first CO2Gas absorption cell
(2) and optical path replicating structure (3), it is incident on the 2nd CO2Gas absorption cell (4), through the 2nd CO2The outgoing of gas absorption cell (4)
Light is reflected after quarter-wave plate (9-5) transmission by polarization splitting prism (9-4), into the second energy-probe (9-6).
6. carbon dioxide concentration measurement scaling system device according to claim 1 or 2, which is characterized in that the gas
Body pond pond temperature control system (5), gas cell Measurement System of Air Pressure (6), pumped vacuum systems (7) and CO2Inflation system (8) control and
CO absorption cell whole intracorporal gas temperature described in measurement and be filled with2Air pressure, to simulate whole under Space-borne equivalent condition
The CO of a atmosphere height layer2Optical thickness is absorbed, by changing the whole intracorporal air pressure of absorption cell and temperature parameter, reaches equivalent mould
Intend spaceborne CO2The requirement that optical thickness changes measures CO to laser radar system2Concentration precision is calibrated.
7. carbon dioxide concentration measurement scaling system device according to claim 2, which is characterized in that in calibration laser thunder
Up to systematic survey CO2Before concentration precision, the CO is utilized2Absorption spectrum measuring system (9) and reflector (10) are to absorption cell
Whole intracorporal CO2Absorption spectrum measures, and calculates relevant Absorption Line parameter to optical thickness for the later period and is corrected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190915.8A CN109164054B (en) | 2018-10-12 | 2018-10-12 | Carbon dioxide concentration measurement and calibration system device |
Applications Claiming Priority (1)
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| CN116008487A (en) * | 2023-03-27 | 2023-04-25 | 珩辉光电测量技术(吉林)有限公司 | Multi-concentration greenhouse gas calibration device with vacuum purging function |
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| CN116008487A (en) * | 2023-03-27 | 2023-04-25 | 珩辉光电测量技术(吉林)有限公司 | Multi-concentration greenhouse gas calibration device with vacuum purging function |
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