CN205229045U - Machine carries perpendicular post concentration laser of troposphere CO2 initiative remote supervising system - Google Patents
Machine carries perpendicular post concentration laser of troposphere CO2 initiative remote supervising system Download PDFInfo
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- CN205229045U CN205229045U CN201520971588.5U CN201520971588U CN205229045U CN 205229045 U CN205229045 U CN 205229045U CN 201520971588 U CN201520971588 U CN 201520971588U CN 205229045 U CN205229045 U CN 205229045U
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Abstract
The utility model provides a machine carries perpendicular post concentration laser of troposphere CO2 initiative remote supervising system. This machine carries perpendicular post concentration laser of troposphere CO2 initiative remote supervising system adopts airborne system, test range is wide, and what adopt is the active detection method, do not receive the influence of sunlight, survey in the time of can realizing the whole day, the application scope of system has been promoted greatly, furthermore, it adopts tunable semiconductor laser absorption spectrum (TDLAS) technique, utilize narrow linewidth and the wavelength of distribution reaction type (DFB) laser instrument characteristic such as tunable, realize the single absorption lines's " fingerprint region " of CO2 gas molecule scanning and measurement, and has the advantages of high sensitivity, the selectivity is good, advantages such as anti other gaseous interference ability reinforces, can be in real time online quick telemetering measurement CO2 post concentration, has good popularization and application value.
Description
Technical field
The utility model relates to atmospheric optics remote sensing monitoring technical field, particularly relates to a kind of for Atmospheric CO
2the airborne troposphere CO of post concentration remote measurement
2vertical column concentration laser is telemetry system initiatively.
Background technology
Greenhouse gas concentration sustainable growth causes a series of whole world and the matters of regional significance such as climate warming, and carbon dioxide, methane, nitrous oxide, sulfur hexafluoride, hydrofluorocarbons, perfluorinated hydrocarbon etc. are all put into Kyoto Protocol and reduce discharging inventory, and CO
2maximum to the contribution rate strengthening greenhouse effect, account for 50 ~ 60%.CO
2as a kind of important greenhouse gases, its source and remittance and their spatial and temporal distributions are to the following Atmospheric CO of prediction
2level and corresponding Global climate change significant.Atmospheric CO
2concentration high resolving power vertical distribution data and variation characteristic thereof, have very important value to National Security Strategy high technology development researchs such as Pollutant Dispersion Law and transport path, satellite remote sensing of the earth and space technologies.At present to Atmospheric CO
2source converge distribution and the understanding of change in time and space thereof and also there is great uncertainty, research CO
2sources and sinks and the variation tendency of concentration of carbon require high detection accuracy, also there is very large gap at this type of detection instrument with in core technology (comprising observation procedure and the algorithm) research of equipment compared with World Developed Countries in China.
Can be used for CO at present
2the method of gas remote measurement mainly contains: laser radar (LIDAR), Fourier spectrometer (FTS), based on the infrared detective instrument of satellite platform, infrared SEQUENCING VERTICAL detection interferometer and scanning imagery absorption spectrometer etc.Laser radar belongs to active probe method, and based on molecular scattering principle, detection range is limited, and detection accuracy is lower.Fourier spectrometer, infrared detective instrument, infrared SEQUENCING VERTICAL detection interferometer etc. belongs to passive detection method, relies on sunshine, can not round-the-clock observation.Therefore, a kind of simple, light, advantage of lower cost is needed in the industry badly and the high telemetry equipment of measuring accuracy, to CO
2areal distribution is carried out onboard flight and is measured.
Utility model content
(1) technical matters that will solve
In view of above-mentioned technical matters, the utility model provide a kind of practical, contactless, can round-the-clock observation for Atmospheric CO
2the airborne troposphere CO of post concentration remote measurement
2vertical column concentration laser is telemetry system initiatively.
(2) technical scheme
According to an aspect of the present utility model, provide a kind of airborne troposphere CO
2vertical column concentration laser is telemetry system initiatively, this airborne troposphere CO
2vertical column concentration laser initiatively telemetry system adopts aircraft carrying and carries out troposphere Atmospheric CO
2the initiatively remote measurement of post concentration laser, comprising: signal generator, and it exports sawtooth signal and synchronous triggering signal; Laser light source module, its rear end is connected to signal generator, and it provides beam of laser, and this laser is undertaken tuning by sawtooth signal, and its wavelength can scan CO
2gas absorption transition spectral line; Fiber optic splitter, is positioned at the light path rear end of laser light source module, and the laser beam splitter provided by laser light source module is four tunnels by it, and the first via is wherein back to laser light source module to regulate the centre wavelength of laser; Laser transmitting-receiving unit, be positioned at the light path rear end of fiber optic splitter in second direction, it is by the second road laser of being obtained by fiber optic splitter beam splitting to ground launch, and it obtains echoed signal that is corresponding and this second road laser, and this echoed signal to comprise between laser transmitting-receiving unit and ground CO in air
2gas is to the absorption spectrum information of laser; Time-frequency convert module, is positioned at the light path rear end of fiber optic splitter at third direction, and the 3rd road laser obtained by fiber optic splitter beam splitting is carried out time-frequency convert by it, obtains interference signal; Power monitoring module, is positioned at the light path rear end of fiber optic splitter at four direction, and it monitors the Strength Changes of the 4th road laser obtained by fiber optic splitter beam splitting, obtains light intensity reference signal, and this light intensity reference signal is as without CO
2the reference signal absorbed; Data acquisition module, is connected to signal generator, laser transmitting-receiving unit, time-frequency convert module and power monitoring module, collects: the echoed signal obtained by laser transmitting-receiving unit under the triggering of its synchronous triggering signal sent at signal generator; The interference signal obtained by time-frequency convert module; The light intensity reference signal obtained by power monitoring module; GPS locating module, is connected to signal generator, obtains the real-time position information of aircraft under the triggering of its synchronous triggering signal sent at signal generator; And host computer, be connected to data acquisition module and GPS locating module, it carries out Inversion Calculation in conjunction with echoed signal, interference signal, light intensity reference signal, obtains troposphere Atmospheric CO
2post concentration information, in conjunction with real-time position information, obtains troposphere Atmospheric CO
2the areal distribution of post concentration.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, signal generator, laser light source module, fiber optic splitter, time-frequency convert module, power monitoring module, data acquisition module and GPS locating module are integrated in system host, the shockproof cabinet of arranged outside; Laser transmitting-receiving unit is arranged independent of system host and host computer, and is communicated with system host light path by optical fiber interface, is communicated with system host by bnc interface; Host computer communicates with GPS locating module with the data acquisition module in system host respectively.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, laser light source module comprises: current controller, Distributed Feedback Laser and fiber amplifier, wherein: current controller, its rear end is connected to signal generator, its front end is connected to Distributed Feedback Laser, wherein, the sawtooth signal that this current controller utilizes signal generator to export as its modulation signal, by the wavelength tuning of Distributed Feedback Laser to scanning CO
2the position of gas absorption transition spectral line; Distributed Feedback Laser, the electric current that it utilizes this current controller to export produces seed laser; Fiber amplifier, its rear end is by Fiber connection to Distributed Feedback Laser, and its front end is by Fiber connection to fiber optic splitter, and the seed laser that Distributed Feedback Laser produces is amplified to predetermined power by this fiber amplifier, and by this Laser output to fiber optic splitter.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, laser light source module also comprises: frequency locking module, temperature controller, wherein: frequency locking module, be positioned at the light path rear end of fiber optic splitter at first direction, it detects the centre wavelength of the first via laser obtained by fiber optic splitter beam splitting; Temperature controller, its rear end is connected to frequency locking module, and its front end is connected to Distributed Feedback Laser, and this temperature controller makes the sufficient center wavelength accuracy of its Output of laser at CO by regulating the temperature of Distributed Feedback Laser
2the center of the absorption line of gas.
Preferably, the airborne troposphere CO of the utility model
2vertical column concentration laser is initiatively in telemetry system, in laser light source module, and temperature controller and the discrete setting of current controller or integrated setting.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, the wavelength of laser light source module Output of laser is between 1572nm ~ 1573nm; Its power is greater than 5W.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, laser transmitting-receiving unit comprises: lens barrel 35 optical fiber interface 34, condenser lens 24, optical fiber collimator 25, photodetector 28, bnc interface 33; Wherein, optical fiber collimator 25 is by launching over the ground after the laser alignment of optical fiber interface 34 self-excitation light source module in future; Condenser lens 24 receives laser that ground diffuse reflection returns and focuses on photodetector 28; The laser echo signal detected is changed into electric signal by photodetector 28, is uploaded to data acquisition module 10 by bnc interface 33; Condenser lens 24, optical fiber collimator 25, photodetector 28 are all arranged in lens barrel 35, and optical fiber interface 34 and bnc interface 33 are arranged on the shell wall of lens barrel 35.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, laser transmitting-receiving unit also comprises: cover plate 23, narrow band pass filter 27, temperature sensor 30, humidity sensor 31, wherein: lens barrel 35 inwall does blackening process, to reduce light disturbance; Condenser lens 24 protected by cover plate 23; Narrow band pass filter 27 is close to photodetector 28 and is installed, the interference of its filtering solar reflection optical; Temperature sensor 30 and humidity sensor 31 are arranged in lens barrel, and the temperature and humidity signal detected is uploaded to data acquisition module by bnc interface 33 by both.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, time-frequency convert module comprises: interferometer and detector; In this time-frequency convert module, interferometric rear end is by Fiber connection to fiber optic splitter, and detector is by Fiber connection extremely interferometric front end; Wherein, by interferometer, the sawtooth wave light signal of the 3rd road laser is converted to the interference light signal of strength distribution, by detector, this interference light signal is converted to electric signal, i.e. interference signal.
Preferably, the airborne troposphere CO of the utility model
2in vertical column concentration laser active telemetry system, aircraft is aircraft, dirigible or unmanned plane.
(3) beneficial effect
As can be seen from technique scheme, the airborne troposphere CO of the utility model
2vertical column concentration laser initiatively telemetry system has following beneficial effect:
(1) adopt mobile system, investigative range is wide, and employing is active probe method, not by the impact of sunshine, can realize round-the-clock observation, greatly improve the scope of application of system;
(2) adopt tunable diode laser absorption spectroscopy (TDLAS) technology, utilize the characteristics such as the narrow linewidth of distributed feedback (DFB) laser instrument and tunable wave length, realize CO
2the scanning of the single absorption line " fingerprint region " of gas molecule and measurement, have the advantages such as highly sensitive, selectivity good, other gas interference performances anti-are strong, can the quick remote measurement CO of real-time online
2post concentration;
(3) adopt TDLAS technology, do not need the high precision such as monochromator, spectrometer spectroscopic instruments, the volume of whole system is little, and robustness is good, strong to adaptive capacity to environment; Break away from the dependence to high precision instrument, greatly reduce cost.
Accompanying drawing explanation
Fig. 1 is according to the airborne troposphere CO of the utility model embodiment
2the structural representation of vertical column concentration laser active telemetry system;
Fig. 2 is troposphere CO airborne shown in Fig. 1
2laser transmitting-receiving cellular construction schematic diagram in vertical column concentration laser active telemetry system.
[main element]
1-signal generator; 2-current controller; 3-temperature controller;
4-DFB laser instrument; 5-frequency locking module; 6-fiber amplifier;
7-fiber optic splitter; 8-time-frequency convert module; 9-power monitoring module;
10-data acquisition module; 11-GPS locating module; 12-direct supply;
13-optical fiber interface; 14-BNC interface; 15-direct supply interface;
16-AC power interface; 17-power switch; 18,19-USB interface;
The shockproof cabinet of 20-; 21-host computer; 22-laser transmitting-receiving unit;
23-cover plate; 24-condenser lens 25-optical fiber collimator;
26-supports fixed bar; 27-narrow band pass filter; 28-photodetector;
29-supports fixed bar; 30-temperature sensor; 31-humidity sensor;
32-direct supply interface; 33-BNC interface; 34-optical fiber interface;
35-lens barrel.
Embodiment
The utility model provides a kind of for Atmospheric CO
2the airborne troposphere CO of post concentration remote measurement
2vertical column concentration laser is telemetry system initiatively, and it can realize Atmospheric CO
2the round-the-clock observation of post concentration.
In an exemplary embodiment of the present utility model, provide a kind of airborne troposphere CO
2vertical column concentration laser is telemetry system initiatively, and it adopts aircraft to carry.Please refer to Fig. 1, the airborne troposphere CO of the present embodiment
2vertical column concentration laser initiatively telemetry system is loaded on aircraft, dirigible or unmanned plane, comprising: signal generator 1, laser light source module, fiber optic splitter 7, laser transmitting-receiving unit, time-frequency convert module 8, power monitoring module 9, GPS locating module 11, data acquisition module 10, host computer 21 and direct supply 12 etc.Wherein, signal generator 1, laser light source module, fiber optic splitter 7, time-frequency convert module 8, power monitoring module 9, GPS locating module 11, data acquisition module 10 and direct supply be integrated in system host, the shockproof cabinet 20 of arranged outside.Laser transmitting-receiving unit 22 is arranged independent of system host and host computer, and is communicated with system host light path by optical fiber interface 13, is communicated with system host by bnc interface 14.Host computer is communicated with GPS locating module with the data acquisition module in system host respectively by USB interface-18,19.
Below to the airborne troposphere CO of the present embodiment
2each ingredient of vertical column concentration laser active telemetry system is described in detail.
Please refer to Fig. 1, signal generator 1 exports sawtooth signal and synchronous triggering signal.Wherein, sawtooth signal is provided to laser light source module and carries out tuning to optical maser wavelength.Synchronous triggering signal is supplied to data acquisition module and GPS locating module.
Laser light source module provides beam of laser, and the wavelength of this laser can scan CO
2gas absorption transition spectral line.Please refer to Fig. 1, this laser light source module comprises: current controller 2, temperature controller 3, Distributed Feedback Laser 4, frequency locking module 5 and fiber amplifier 6.
In laser light source module, continue referring to Fig. 1, the rear end of current controller 2 is connected to signal generator 1, front end is connected to Distributed Feedback Laser 4, it drives Distributed Feedback Laser 4 to work, the sawtooth signal utilizing signal generator 1 to export is carried out tuning to the optical maser wavelength that laser instrument exports, and makes laser output wavelength between 1572nm to 1573nm, thus can scan CO
2gas is positioned at an absorption jump spectral line near 1572nm.The present embodiment adopts the absorption jump spectral line being positioned at 1572.3nm.In addition, difference and other direction of scanning in prior art, the power of laser light source module Output of laser is sufficiently high, to guarantee that laser echo signal can be detected.Generally, need to be greater than 5W.
The front end of Distributed Feedback Laser 4 is connected to fiber optic splitter 7 by fiber amplifier 6, and the seed laser that Distributed Feedback Laser exports is amplified to predetermined power through fiber amplifier 6, is output to fiber optic splitter 7.Laser is divided into four tunnels by fiber optic splitter 7.
Fiber optic splitter 7 is positioned at the light path rear end of fiber amplifier 6, and the laser beam splitter exported by fiber amplifier 6 is four tunnels by it.
In the four road laser separated by fiber optic splitter 7, the first via enters frequency locking module 5.This frequency locking module 5 is positioned at the light path rear end of described fiber optic splitter at first direction, and it utilizes the centre wavelength of this road laser detection laser instrument Output of laser.The rear end of temperature controller 3 is connected with frequency locking module 5, and front end is connected with Distributed Feedback Laser, and it makes the sufficient center wavelength accuracy of its Output of laser at CO by regulating the temperature of Distributed Feedback Laser
2the center of the absorption line of gas.
In the four road laser separated by fiber optic splitter 7, the second tunnel enters laser transmitting-receiving unit 22.Laser transmitting-receiving unit 22 is positioned at the light path rear end of described fiber optic splitter 7 in second direction, its by the second road laser of being obtained by fiber optic splitter beam splitting to ground launch, it obtains the echoed signal of corresponding and this second road laser, and this echoed signal to comprise between laser transmitting-receiving unit and ground CO in air
2gas is to the absorption spectrum information of laser;
Please refer to Fig. 2, this laser transmitting-receiving unit 22 comprises: cover plate 23, condenser lens 24, optical fiber collimator 25, support fixed bar 26, narrow band pass filter 27, photodetector 28, support fixed bar 29, temperature sensor 30, humidity sensor 31, direct supply interface 32, bnc interface 33, optical fiber interface 34, lens barrel 35.
Continue referring to Fig. 2, in laser transmitting-receiving unit, wherein, cover plate 23 plays a part to protect condenser lens 24.Optical fiber collimator 25, is launched the laser from system host after collimation over the ground by optical fiber interface 34; Condenser lens 24 receives Laser Focusing that ground diffuse reflection returns on photodetector 28; Narrow band pass filter 27 is close to photodetector and is installed, the interference of filtering solar reflection optical; The laser echo signal detected is changed into electric signal by photodetector 28, is uploaded to the data acquisition module 10 in system host by bnc interface 33, to comprise between laser transmitting-receiving unit 22 and ground CO in air in this echoed signal
2gas is to the absorption spectrum information of laser.The temperature and humidity signal detected is uploaded to the data acquisition module 10 in system host by temperature sensor 30 and humidity sensor 31 by bnc interface 33.Direct supply interface 32 connects the direct supply 12 in shockproof cabinet 20 and temperature sensor, humidity sensor, the photodetector in laser transmitting-receiving unit 22.Lens barrel 35 inwall does blackening process, to reduce light disturbance.
In the four road laser separated by fiber optic splitter 7, the 3rd tunnel enters time-frequency convert module 8.This time-frequency convert module 8 is positioned at the light path rear end of described fiber optic splitter at third direction, comprising: interferometer and detector.Wherein, interferometer is used for interference light signal sawtooth wave light signal being converted to strength distribution.Detector is connected with interferometer, and interference light signal is converted to electric signal by it, i.e. interference signal, then sends into data acquisition module 10 and gather.
In the four road laser separated by fiber optic splitter 7, the 4th road ingoing power monitoring modular 9.This power monitoring module 9 is positioned at the light path rear end of described fiber optic splitter in fourth direction, for obtaining the intensity of the 4th road laser, as the light intensity reference signal of system, can monitor the duty of laser instrument simultaneously.This light intensity reference signal is gathered by data acquisition module 10, as without CO
2the reference signal absorbed.
Gather under the triggering of the trigger pip that data acquisition module 10 sends at signal generator 1,3 passages of data acquisition module connect time-frequency convert module 8, power monitoring module 9 and laser transmitting-receiving unit 22 respectively, 5 Channel Synchronous samplings under the triggering of trigger pip, this data acquisition module 10 gathers: the interference signal that (a) is sent into by time-frequency convert module 8; B light intensity reference signal that () is sent into by power monitoring module; (c) by laser transmitting-receiving unit send into CO
2temperature signal in the echoed signal of gas absorption information, lens barrel and moisture signal; And these signals are uploaded to host computer 21 by usb 18.
Work under the triggering of the synchronous triggering signal that GPS locating module 11 sends at signal generator 1, obtain the current position of system, and the real-time position information of acquisition is uploaded to host computer 21 by usb 19.
Be connected to described data acquisition module 10 in host computer 21, it carries out Inversion Calculation in conjunction with described echoed signal, interference signal, light intensity reference signal, obtains troposphere Atmospheric CO
2post concentration information, in conjunction with real-time position information, obtains troposphere Atmospheric CO
2the areal distribution of post concentration.
Specifically, host computer 21: first peak-seeking computing is carried out to interference signal, then carry out time-frequency convert, will with CO
2echoed signal and the light intensity reference signal of gas absorption information are transformed into frequency domain from time domain, the echoed signal of frequency domain and light intensity reference signal are carried out to the process such as background deduction, ratio computing, integral operation and obtain CO on path
2the absorbance curve of gas, the temperature sent into according to temperature and moisture sensors, humidity data is to CO
2the line style of gaseous absorption line is revised, and then obtains accurate CO
2post concentration, simultaneously in conjunction with the real-time position information that GPS locating module is sent into, obtains room atmosphere CO
2the areal distribution of post concentration.
The alternating current inputted by AC power interface is converted to direct current by direct supply 12, and for each active parts in system host is powered, be that laser transmitting-receiving unit is powered by direct supply interface, its opening and closing is controlled by power switch 17 simultaneously.
So far, by reference to the accompanying drawings the utility model embodiment has been described in detail.Describe according to above, those skilled in the art should to the airborne troposphere CO of the utility model
2vertical column concentration laser active telemetry system has had clearly to be familiar with.
It should be noted that, in accompanying drawing or instructions text, the implementation not illustrating or describe, is form known to a person of ordinary skill in the art in art, is not described in detail.In addition, the above-mentioned definition to each element and method is not limited in various concrete structures, shape or the mode mentioned in embodiment, and those of ordinary skill in the art can change simply it or replace, such as:
(1) current controller in figure and temperature controller can also adopt the form united two into one;
(2) along with the development of laser technology, the mode that Distributed Feedback Laser and fiber amplifier combine also can replace with high-power narrow line width regulatable laser future;
(3) condenser lens in figure can adopt the various ways such as simple lens, cemented doublet, Fresnel Lenses.
In sum, the utility model does not need the precision measurement equipments such as spectrometer, again can quick obtaining CO while reducing system bulk and cost compared with other optical meanss
2the areal distribution information of post concentration, can be applicable to Atmospheric CO
2concentration range distribution detection and the research of discharge of pollutant sources supervisory monitoring, have stronger practicality or good popularizing application prospect.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. an airborne troposphere CO
2vertical column concentration laser is telemetry system initiatively, it is characterized in that, adopts aircraft carrying and carries out troposphere Atmospheric CO
2the initiatively remote measurement of post concentration laser, comprising:
Signal generator, it exports sawtooth signal and synchronous triggering signal;
Laser light source module, its rear end is connected to described signal generator, and it provides beam of laser, and this laser is undertaken tuning by described sawtooth signal, and its wavelength can scan CO
2gas absorption transition spectral line;
Fiber optic splitter, is positioned at the light path rear end of described laser light source module, and the laser beam splitter provided by described laser light source module is four tunnels by it, and the first via is wherein back to laser light source module to regulate the centre wavelength of laser;
Laser transmitting-receiving unit, be positioned at the light path rear end of described fiber optic splitter in second direction, it is by the second road laser of being obtained by fiber optic splitter beam splitting to ground launch, and it obtains echoed signal that is corresponding and this second road laser, and this echoed signal to comprise between laser transmitting-receiving unit and ground CO in air
2gas is to the absorption spectrum information of laser;
Time-frequency convert module, is positioned at the light path rear end of described fiber optic splitter at third direction, and the 3rd road laser obtained by fiber optic splitter beam splitting is carried out time-frequency convert by it, obtains interference signal;
Power monitoring module, is positioned at the light path rear end of described fiber optic splitter at four direction, and it monitors the Strength Changes of the 4th road laser obtained by fiber optic splitter beam splitting, obtains light intensity reference signal, and this light intensity reference signal is as without CO
2the reference signal absorbed;
Data acquisition module, is connected to described signal generator, laser transmitting-receiving unit, time-frequency convert module and power monitoring module, collects: the echoed signal obtained by laser transmitting-receiving unit under the triggering of its synchronous triggering signal sent at described signal generator; The interference signal obtained by time-frequency convert module; The light intensity reference signal obtained by power monitoring module;
GPS locating module, is connected to described signal generator, obtains the real-time position information of aircraft under the triggering of its synchronous triggering signal sent at described signal generator; And
Host computer, is connected to described data acquisition module and GPS locating module, and it carries out Inversion Calculation in conjunction with described echoed signal, interference signal, light intensity reference signal, obtains troposphere Atmospheric CO
2post concentration information, in conjunction with real-time position information, obtains troposphere Atmospheric CO
2the areal distribution of post concentration.
2. airborne troposphere CO according to claim 1
2vertical column concentration laser is telemetry system initiatively, it is characterized in that, described signal generator, laser light source module, fiber optic splitter, time-frequency convert module, power monitoring module, data acquisition module and GPS locating module are integrated in system host, the shockproof cabinet of arranged outside;
Described laser transmitting-receiving unit is arranged independent of system host and host computer, and is communicated with system host light path by optical fiber interface, is communicated with system host by bnc interface; Host computer communicates with GPS locating module with the data acquisition module in system host respectively.
3. airborne troposphere CO according to claim 1
2vertical column concentration laser is telemetry system initiatively, and it is characterized in that, described laser light source module comprises: current controller, Distributed Feedback Laser and fiber amplifier, wherein:
Described current controller, its rear end is connected to described signal generator, and its front end is connected to described Distributed Feedback Laser, wherein, the sawtooth signal that this current controller utilizes described signal generator to export as its modulation signal, by the wavelength tuning of Distributed Feedback Laser to scanning CO
2the position of gas absorption transition spectral line;
Described Distributed Feedback Laser, the electric current that it utilizes this current controller to export produces seed laser;
Described fiber amplifier, its rear end is by Fiber connection extremely described Distributed Feedback Laser, its front end is by Fiber connection to described fiber optic splitter, and the described seed laser that described Distributed Feedback Laser produces by this fiber amplifier is amplified to predetermined power, and by this Laser output to described fiber optic splitter.
4. airborne troposphere CO according to claim 3
2vertical column concentration laser is telemetry system initiatively, and it is characterized in that, described laser light source module also comprises: frequency locking module, temperature controller, wherein:
Described frequency locking module, is positioned at the light path rear end of described fiber optic splitter at first direction, and it detects the centre wavelength of the first via laser obtained by fiber optic splitter beam splitting;
Described temperature controller, its rear end is connected to described frequency locking module, and its front end is connected to described Distributed Feedback Laser, and this temperature controller makes the sufficient center wavelength accuracy of its Output of laser at CO by regulating the temperature of described Distributed Feedback Laser
2the center of the absorption line of gas.
5. airborne troposphere CO according to claim 4
2vertical column concentration laser initiatively telemetry system, is characterized in that, in described laser light source module, and described temperature controller and the discrete setting of current controller or integrated setting.
6. airborne troposphere CO according to claim 1
2vertical column concentration laser is telemetry system initiatively, and it is characterized in that, the wavelength of described laser light source module Output of laser is between 1572nm ~ 1573nm; Its power is greater than 5W.
7. airborne troposphere CO according to claim 1
2vertical column concentration laser is telemetry system initiatively, it is characterized in that, described laser transmitting-receiving unit comprises: lens barrel (35) optical fiber interface (34), condenser lens (24), optical fiber collimator (25), photodetector (28), bnc interface (33);
Wherein, optical fiber collimator (25) is by launching over the ground after the laser alignment of optical fiber interface (34) self-excitation light source module in future; The laser that condenser lens (24) reception ground diffuse reflection is returned also focuses on photodetector (28); The laser echo signal detected is changed into electric signal by photodetector (28), is uploaded to data acquisition module (10) by bnc interface (33);
Described condenser lens (24), optical fiber collimator (25), photodetector (28) are all arranged in lens barrel (35), and described optical fiber interface (34) and bnc interface (33) are arranged on the shell wall of described lens barrel (35).
8. airborne troposphere CO according to claim 7
2vertical column concentration laser is telemetry system initiatively, and it is characterized in that, described laser transmitting-receiving unit also comprises: temperature sensor (30), humidity sensor (31), wherein:
Temperature sensor (30) and humidity sensor (31) are arranged in lens barrel, and the temperature and humidity signal detected is uploaded to data acquisition module by bnc interface (33) by both.
9. airborne troposphere CO according to claim 8
2vertical column concentration laser is telemetry system initiatively, and it is characterized in that, described laser transmitting-receiving unit also comprises: cover plate (23) and narrow band pass filter (27), wherein:
Lens barrel (35) inwall does blackening process, to reduce light disturbance;
Cover plate (23) protection condenser lens (24);
Narrow band pass filter (27) is close to described photodetector (28) and is installed, the interference of its filtering solar reflection optical.
10. airborne troposphere CO according to any one of claim 1 to 9
2vertical column concentration laser is telemetry system initiatively, and it is characterized in that, described time-frequency convert module comprises: interferometer and detector;
In this time-frequency convert module, described interferometric rear end is by Fiber connection to described fiber optic splitter, and described detector is by Fiber connection extremely described interferometric front end;
Wherein, by interferometer, the sawtooth wave light signal of described 3rd road laser is converted to the interference light signal of strength distribution, by detector, this interference light signal is converted to electric signal, i.e. described interference signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520971588.5U CN205229045U (en) | 2015-11-30 | 2015-11-30 | Machine carries perpendicular post concentration laser of troposphere CO2 initiative remote supervising system |
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| CN201520971588.5U CN205229045U (en) | 2015-11-30 | 2015-11-30 | Machine carries perpendicular post concentration laser of troposphere CO2 initiative remote supervising system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510274A (en) * | 2015-11-30 | 2016-04-20 | 中国科学院光电研究院 | Airborne laser active remote measurement system for concentration of atmospheric CO2 column |
| CN106053021A (en) * | 2016-05-18 | 2016-10-26 | 东南大学 | Method for determining distributed feedback laser time frequency response curve |
-
2015
- 2015-11-30 CN CN201520971588.5U patent/CN205229045U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510274A (en) * | 2015-11-30 | 2016-04-20 | 中国科学院光电研究院 | Airborne laser active remote measurement system for concentration of atmospheric CO2 column |
| CN105510274B (en) * | 2015-11-30 | 2018-01-23 | 中国科学院光电研究院 | Airborne laser Atmospheric CO2Post concentration active telemetry system |
| CN106053021A (en) * | 2016-05-18 | 2016-10-26 | 东南大学 | Method for determining distributed feedback laser time frequency response curve |
| CN106053021B (en) * | 2016-05-18 | 2018-07-20 | 东南大学 | A kind of determination method of distributed feedback laser time-frequency response curve |
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