CN108195777A - The multiaxis passive differential absorption spectrum measuring system of state of the sky can be recorded simultaneously - Google Patents
The multiaxis passive differential absorption spectrum measuring system of state of the sky can be recorded simultaneously Download PDFInfo
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- CN108195777A CN108195777A CN201711286641.8A CN201711286641A CN108195777A CN 108195777 A CN108195777 A CN 108195777A CN 201711286641 A CN201711286641 A CN 201711286641A CN 108195777 A CN108195777 A CN 108195777A
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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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- 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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
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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
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N2021/4704—Angular selective
- G01N2021/4711—Multiangle measurement
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention belongs to field of optical measuring technologies, specially a kind of multiaxis passive differential absorption spectrum measuring system that can record state of the sky simultaneously, including：Rotating platform, telescope, camera, axis, spectrometer, computer；Wherein, telescope and camera respectively with axis vertical connection, and the centerline parallel of both telescope and camera；Telescope obtains corresponding spectrogram, spectrogram input computer for converging diffusion light of the sun signal, and signal is sent into spectrometer after spectrometer is divided；Camera is used to shoot sky cloud layer picture, and picture is inputted computer；Computer is by controlling rotating platform to control the rotation angle of axis, so as to which telescope and camera be controlled to obtain the spectral signal under any angle and sky cloud layer situation simultaneously；Computer obtains the column concentration of contaminant trace species in troposphere after spectral information is parsed, with reference to captured sky cloud layer picture, obtain the pollutant vertical distribution information in the case where cloud noise is small.
Description
Technical field
The invention belongs to field of optical measuring technologies, and in particular to a kind of multiaxis of state of the sky that can record simultaneously is by moment
Divide absorption spectrum measuring system.
Background technology
Atmospheric environment problem attracts attention always in recent decades, and people are increasingly paid close attention to atmospheric trace gas space-time
The research of distribution, these trace gas are to health（Such as NO2、SO2、HCHO）, atmospheric oxidn ability（Such as O3、OH、HONO）With
The formation of secondary organic aerosol（Such as CHOCHO）There is significant impact, concentration in an atmosphere becomes many scientific research institutions
There is an urgent need to data.Present measuring technique is both rear mainly based on traditional chemical point measurement, mass spectrum and spectroscopic methodology
Compared with chemical point measurement, there is real-time online, quick and measurement of multi-components；And the vacuum environment of mass spectrography
It is higher to mechanical design requirements, therefore spectroscopic methodology is become with advantages such as its simple mechanical structure and quick real-time online measurings
One of current popular aeromerric moasurenont method.
The trace gas to earth's surface under a certain segment distance is only capable of using the active difference absorption spectrum system of artificial light source
Concentration of component measures, and the passive differential absorption spectrum using sunlight as light source can be dissipated by receiving after air
The sunlight penetrated obtains the average column concentration of trace gas in entire atmosphere.Passive differential absorption spectroscopy system does not need to be artificial
Light source and corner reflector, structure are more simple.It, can be to the trace gas in troposphere by the observation of multiple low angle pitch angles
Body carries out more accurate measure.
Since passive differential absorption spectroscopy system to receive diffusion light of the sun obtains the absorption spectrum signal of trace gas,
Therefore when telescope is towards the sky for having cloud layer, measurement result will generate very big error, tradition it is conventional by moment
Point absorption spectroscopy system cannot record this case in real time, lack foundation for the screening of follow-up observed result.The present invention adds
Add one group of camera with receiving telescope with visual field, and with the pitch angle synchronous rotary of telescope, record sky in real time
Middle cloud layer situation, effective foundation as the screening of follow-up observed result.
Invention content
The defects of it is an object of the invention to make up the prior art, provides a kind of multiaxis that can record state of the sky simultaneously
Passive differential absorption spectrum measuring system, the synchronous state of the sky preserved under telescope difference observation angle, after final analysis
Result accurately screened.
The multiaxis passive differential absorption spectrum measuring system provided by the invention that state of the sky can be recorded simultaneously, it is main to wrap
It includes：Rotating platform, telescope, camera, axis, spectrometer, computer；Wherein, telescope and camera hang down respectively with axis
It is direct-connected to connect, and both telescope and camera keeping parallelism；Telescope is used to converge diffusion light of the sun signal, and for signal to be sent into
Spectrometer obtains corresponding spectrogram after spectrometer is divided, and inputs computer；Camera is used to shoot sky cloud layer figure
Piece, and picture is inputted computer；Computer connect with rotating platform and controls rotating platform rotation angle；Rotating platform is in
Axis connection, for controlling the rotation angle of axis, so as to which telescope and camera be controlled to obtain the spectrum under any angle simultaneously
Signal and sky cloud layer situation；Computer obtains the column concentration of contaminant trace species in troposphere after spectral information is parsed, with reference to
Captured sky cloud layer picture, screens analysis result, obtains the pollutant in the case where cloud noise is small and vertically divides
Cloth information.
In the present invention, the rotating platform rotates to any angle by computer control, and slewing area is 0 to 360 degree, most
Small rotation angle is 0.005 degree, can precisely and rapidly rotate to preset angle.
In the present invention, the telescope is made of quartzy convex lens sheet, lens cone for telescope, sealing flange and optical fiber, wherein,
Optical tube length should be equal with quartzy convex lens sheet focal length；Diffusion light of the sun is converged to by quartzy convex lens at fiber entrance, is made
Light intensity into spectrometer is sufficiently large, improves signal-to-noise ratio；Quartzy convex lens is carried out close with lens barrel upper end using weather seal silica gel
Envelope, keeps the fastness of convex lens, and can prevent rainwater from penetrating into；Lens barrel lower end is connected using O circles with sealing flange, is filled on flange
There is optical fiber mounting base, be connected and sealed using weather seal silica gel.
In the present invention, the camera is made of quartz glass plate, camera shooting head lens barrel, electron camera and sealing flange；
Quartz glass plate is connect with camera shooting head lens barrel upper end, is sealed using weather seal silica gel, as the window of camera, prevented
The infiltration of rainwater；Electron camera is placed in parallel with quartz glass plate and consolidates installation, ensures captured picture and camera
Visual field is consistent；Camera shooting head lens barrel lower end is also to be connected using O circles with sealing flange, flange periphery stay there are one aperture, be used for
Electron camera data line is placed, it can be achieved that the transmission of the control and picture to electron camera.
In the present invention, the axis with telescope and camera vertical connection, and ensures telescope and camera two respectively
The centerline parallel of person makes camera consistent with the visual field of telescope.
In the present invention, cooling device is come with inside the spectrometer, to reduce the thermal noise of ccd detector, this is by pole
Its interference to diffusion light of the sun signal is reduced greatly, improves the signal-to-noise ratio of whole system；Spectrometer is put in interior, ensures it
Operating temperature is stablized relatively, obtains stable spectral information, ensures measurement accuracy.
In the present invention, the rotating platform control software that is carried in the computer can accurately control telescope and camera shooting
The pitch angle of head, and the diffusion light of the sun absorption spectrum preservation synchronous with state of the sky picture that the two is transmitted.
The advantages of the present invention over the prior art are that：In telescope the same of diffusion light of the sun is received with different pitch angles
When, the state of sky under current field is had recorded, the presence of cloud layer causes the observation knot of multiaxis passive differential absorption spectroscopy system
Fruit deviation is larger, and conventional system only records the state of the sky of a certain fixed angle, can not really and accurately reflect
Sky condition under current absorption spectrum, it is impossible to as the foundation for subsequently screening invalid observation.
Description of the drawings
Fig. 1 is the system structure diagram of apparatus of the present invention.
Fig. 2 is the outer machine structure diagram of apparatus of the present invention.
Figure label：1 is Water-proof aluminium box, and 2 be platform, and 3 be rotating platform, and 4 be fixed seat, and 5 be limiting strut, and 6 is hope
Remote mirror, 7 be convex lens, and 8 be sealing flange, and 9 be axis, and 10 be connecting flange, and 11 be sealing flange, and 12 be optical fiber, and 13 are limited
Bit switch pedestal, 14 be support shaft, and 15 be quartz glass, and 16 be camera, and 17 be sealing flange, and 18 be sealing flange, and 19 are
Connecting flange, 20 be rotating platform waterproof cover, and 21 be spectrometer, and 22 be computer, 23 lines in order to control, and 24 lines in order to control, 25 are
Spectral signal transmission line.
Specific embodiment
Such as Fig. 1, shown in 2, rotating platform 3 is fixed in fixed seat 4 in the embodiment of the present invention, and is connect with axis 9；Axis
9 pass on left connecting flange 19 is connected with camera system 16, and camera is carried out using quartz glass 15 and sealing flange 17
Sealing；It is connected on the right side of axis by connecting flange 10 with telescopic system 6, telescope uses quartzy convex lens 7 and Sealing Method
Orchid 11 seals；Adjust the centerline parallel of camera system 16 and telescopic system 6；Computer 22 is by control line 23 to rotation
3 rotation angle of platform is controlled；Rotating platform 3 is placed in Water-proof aluminium box 1, flange is used in its junction with axis 9
8th, it 18 is sealed；Entire rotary system is placed on platform 2, and pass through support shaft 14 and fix；
Computer 22 controls the rotation of rotating platform 3 to limiting by control line 23, that is, limits strut 5 and touch limit switch pedestal
13；Rotating platform 3 is reversely adjusted, makes telescope 6（Or camera 16）Center line is horizontal, and the rotation angle is recorded in software
In setting, in this, as 0 degree of pitch angle of the set system；Presetting pitching rotation angle is filled in software setting, you can
Realize the multiaxis observation of the set system.
Telescope 6（Or camera 16）After reaching specified angle according to the rotation angle that computer 22 is set, telescope 6 is logical
It crosses quartzy convex lens 7 to converge to diffusion light of the sun in optical fiber 12, and is divided by spectrometer 21 and opto-electronic conversion, obtained too
Positive scattering spectrum, and pass through transmission line 25 and be sent into computer 22；At the same time, computer 22 controls camera by control line 24
Shoot the state of the sky under current angular；Diffusion light of the sun, which is composed, to be stored in state of the sky figure in computer 22, by by moment
Point absorption spectroanalysis method obtains observation, will wherein have apparent cloud noise screen with reference to state of the sky figure.
Claims (5)
1. a kind of multiaxis passive differential absorption spectrum measuring system that can record state of the sky simultaneously, which is characterized in that including：Rotation
Turn platform, telescope, camera, axis, spectrometer, computer；Wherein, telescope and camera is vertical with axis respectively connects
It connects, and the center line keeping parallelism of both telescope and camera；Telescope is for converging diffusion light of the sun signal, and by signal
Spectrometer is sent into, corresponding spectrogram, spectrogram input computer are obtained after spectrometer is divided；Camera is used to shoot sky
Cloud layer picture, and picture is inputted computer；Computer connect with rotating platform and controls rotating platform rotation angle；Rotary flat
Platform and middle axis connection, for controlling the rotation angle of axis, so as to which telescope and camera be controlled to obtain under any angle simultaneously
Spectral signal and sky cloud layer situation；Computer obtains contaminant trace species in troposphere column after spectral information is parsed is dense
Degree, with reference to captured sky cloud layer picture, screens analysis result, obtains the pollutant in the case where cloud noise is small
Vertical distribution information.
2. the multiaxis passive differential absorption spectroscopy system according to claim 1 that state of the sky can be recorded simultaneously, feature
It is, the rotating platform rotates to any angle by computer control, and slewing area is 0 to 360 degree, and minimum rotation angle is
0.005 degree, it can precisely and rapidly rotate to preset angle.
3. the multiaxis passive differential absorption spectroscopy system according to claim 1 that state of the sky can be recorded simultaneously, feature
It is, the telescope is made of quartzy convex lens sheet, lens cone for telescope, sealing flange and optical fiber；Wherein, optical tube length and stone
English convex lens sheet focal length is equal；Diffusion light of the sun is converged to by quartzy convex lens at fiber entrance, makes the light into spectrometer
It is strong sufficiently large；Quartzy convex lens is sealed with lens barrel upper end using weather seal silica gel, keeps the fastness of convex lens, and energy
Prevent rainwater from penetrating into；Lens barrel lower end is connected using O circles with sealing flange, equipped with optical fiber mounting base on flange, uses weather seal
Silica gel is connected and sealed.
4. the multiaxis passive differential absorption spectroscopy system according to claim 1 that state of the sky can be recorded simultaneously, feature
It is, the camera is made of quartz glass plate, camera shooting head lens barrel, electron camera and sealing flange；Quartz glass plate with
The connection of head lens barrel upper end is imaged, is sealed using weather seal silica gel, as the window of camera, prevents the infiltration of rainwater；
Electron camera is placed in parallel with quartz glass plate and consolidates installation, ensures that captured picture is consistent with camera visual field；
Camera shooting head lens barrel lower end is connected using O circles with sealing flange, and flange periphery is stayed there are one aperture, for placing electron camera number
According to line, the control to electron camera and the transmission of picture are realized.
5. the multiaxis passive differential absorption spectroscopy system according to claim 1 that state of the sky can be recorded simultaneously, feature
It is, cooling device is come with inside the spectrometer, reduces the thermal noise of ccd detector；Spectrometer is put in interior, ensures
Its operating temperature is stablized relatively, obtains stable spectral information, ensures measurement accuracy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711286641.8A CN108195777B (en) | 2017-12-07 | 2017-12-07 | Multi-axis passive differential absorption spectrum measuring system capable of simultaneously recording sky condition |
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| CN201711286641.8A CN108195777B (en) | 2017-12-07 | 2017-12-07 | Multi-axis passive differential absorption spectrum measuring system capable of simultaneously recording sky condition |
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| CN108195777A true CN108195777A (en) | 2018-06-22 |
| CN108195777B CN108195777B (en) | 2020-05-26 |
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Cited By (3)
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| CN108872111A (en) * | 2018-07-05 | 2018-11-23 | 中国科学院合肥物质科学研究院 | A kind of scattering light passive differential absorption spectrum multiaxis scanning means |
| CN111089548A (en) * | 2019-12-16 | 2020-05-01 | 天津大学 | Medium-and-long-distance three-dimensional imaging system with high-resolution texture |
| CN112540047A (en) * | 2020-12-22 | 2021-03-23 | 安徽蓝盾光电子股份有限公司 | Atmospheric environment three-dimensional detection differential absorption spectrometer |
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