CN201051075Y - Passive differential optical absorption spectrum analyzer - Google Patents
Passive differential optical absorption spectrum analyzer Download PDFInfo
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- CN201051075Y CN201051075Y CNU2007200707287U CN200720070728U CN201051075Y CN 201051075 Y CN201051075 Y CN 201051075Y CN U2007200707287 U CNU2007200707287 U CN U2007200707287U CN 200720070728 U CN200720070728 U CN 200720070728U CN 201051075 Y CN201051075 Y CN 201051075Y
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Abstract
The utility model belongs to the optical measurement technique field, in particular to a passive differential optical absorbing spectrum device based on zenith infraction, which comprises a light path receive device, a spectrum device, a connection fiber, a computer and a GPS system, wherein the spectrum is composed of a calibration lens, grating and a detector, the spectrum and a computer are connected via electrical cables, the computer finally processes the measurement spectrum, displays and stores measurement results, and the GPS system is connected to the computer to provide the coordinate position of a computer instrument for two-dimensional plane display. The device is simple in structure, easy to move and large in monitor range, and can be widely applied in continuous measurement on high, middle and low or whole layers of air components, and the device can be also used in movable working conditions to study the bivariate distribution of pollutants in municipal and regional atmospheric environment.
Description
Technical field
The utility model belongs to field of optical measuring technologies, is specifically related to a kind of passive differential optical absorption spectra instrument that utilizes natural light for light source.
Background technology
Dusty gas in the atmosphere, influence is very tangible to health of people as nitrogen dioxide, sulphuric dioxide, ozone, formaldehyde etc.At present, for they are measured, often use air nitrogen dioxide, sulphuric dioxide, ozone automonitor and long-range difference absorption spectrum gaseous contamination monitoring device.For automonitor, when monitoring, instrument carries out chemical reaction with gas to be measured and some material earlier, makes it be in excited state, utilize its emitted luminescence intensity and proportional relation of concentration when ground state transition again, come the concentration of inverting gas to be measured by measuring its luminous intensity.When working as the nitrogen dioxide monitor, earlier nitrogen dioxide is changed into nitrogen monoxide, allow nitrogen monoxide and excessive ozone reaction again, produce the nitrogen dioxide of excited state, the nitrogen dioxide of this excited state is very unstable, and ground state is returned in very fast transition, and emission wavelength ranges is the light of 600～3000nm, determine nitric oxide production concentration according to the emission light intensity that records, extrapolate content of nitrogen dioxide by nitric oxide concentration at last; The measuring principle of ozone and top also very similar, only ozone is based on formaldehyde or the ethylene glycol that itself and ethylene reaction produce excited state; Sulphuric dioxide is the sampling ultraviolet fluorescence method, instrument is generally by sample cell, ultraviolet source, detector constitutes, during monitoring, sulphuric dioxide is fed sample cell, use the UV-irradiation of wavelength 190～300nm then, sulfur dioxide molecule transits to excited state after absorbing ultraviolet light, when the sulfur dioxide molecule that is in excited state is got back to ground state, launch near the Ultraluminescence of peak wavelength 330nm, this fluorescence intensity and sulfur dioxide concentration are linear, and then extrapolate sulfur dioxide concentration again, and but being every kind of instrument, the weak point of this quasi-instrument can only measure a kind of pollutant, the instrument maintenance workload is big.For long-range difference absorption spectrum gaseous contamination monitoring device, it is to utilize gas molecule to the specific absorption principle work of some wavelength light, its course of work is that emission connects/receives telescope and fixes at one end, a corner reflector is placed in place about distance 500m, the light that telescope is launched is received by telescope after reflecting through corner reflector again, transport light to spectrometer by optical fiber then and carry out beam split, the optical signals detector detects, and send into computing machine and carry out spectral analysis, be finally inversed by the concentration of light path through pollutant in the zone, the advantage of this technology is to measure multiple pollutant simultaneously, measured zone is bigger, but because equipment is huger, have no idea to carry out traverse measurement, and because the position limit of corner reflector can only be carried out the measurement of fixed area, and measurement range is limited in cannot carrying out aerological measurement near tens meters on the ground.
At present the method that upper atmosphere is measured mainly is by discharging the means of sounding balloon, and sounding balloon carries several surveying instruments at every turn, slowly is raised to the high-altitude by ground, and it surveys route mainly by at that time meteorological condition decision.This method cost height, investigative range is subjected to meteorological factor influence bigger, and temporal resolution is low, and efficient is not done.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of passive differential optical absorption spectra instrument based on sunshine for overcoming weak point of the prior art.
The technical scheme that is adopted comprises a light path receiving trap, and this light path receiving trap is made of convex lens and optical filter, aims at the sky direction during work all the time, receives the sunshine that gets off from the scattering of sky direction, does not need to follow the sun and moves; A spectrometer, this spectrometer is formed by grating, collimating mirror and detector are integrated; One connects optical fiber, and this optical fiber is the ultraviolet silica fibre, is used to connect light path receiving trap and spectrometer; Said spectrometer links to each other with control computer by cable, and said computing machine is connected with gps system.
Further improvement as technical scheme, described light path receiving trap is made of convex lens and optical filter, the incident end of silica fibre is at the focus place of convex lens, it above convex lens optical filter, be used for the unwanted part of elimination diffusion light of the sun, prevent that rainwater, dust from falling on the convex lens; Gps system links to each other with computing machine, and the coordinate position of computer apparatus is provided, and is used for the two dimension of measurement result is shown in real time.
With respect to prior art, this device is to utilize to gather sun zenith scattered light, analyze sunshine when getting through the earth's atmosphere by atmospheric molecule absorbing state, come a kind of spectral analysis technique of inverting atmospheric molecule composition and concentration, because the measure spectrum scope is wide, therefore can measure multiple Atmospheric components simultaneously, overcome the shortcoming of above-mentioned pollutant automonitor; Because sunshine passes through whole atmosphere, so this technology can measure upper atmosphere, overcome the weak point that above-mentioned long-range difference absorption spectrum gaseous contamination monitoring device can only be measured near the pollutant ground; Because the acquisition time of measure spectrum is about 5 minutes, has higher Measuring Time resolution, Measurement Resolution low (measure once general every day) when having overcome above-mentioned sounding balloon and measuring, device be complicated, measure the high shortcoming of cost.
Being linked to each other with computing machine by GPS in the utility model, in real time the instrument position coordinates is transferred to computing machine, therefore can carry out the two dimensional surface distribution to measurement result in real time and show, is that above-mentioned several measuring technique is unexistent.
This technical equipment is simple in structure, is convenient to vehicle-mounted, boat-carrying and moves, and is suitable for the atmospheric environment in is in a big way measured, and can obtain the planar distribution plan of pollutant distribution.Because in the course of the work without any need for consumptive material, operating cost is extremely low, is suitable for promoting the use of.
Description of drawings
Fig. 1 is a kind of basic structure synoptic diagram of the present utility model.
Number in the figure: 1 is the light path receiving trap, and 2 is optical fiber, and 3 is spectrometer, and 4 is cable, and 5 is computing machine, and 6 is gps system, and 11 is optical filter, and 12 is convex lens.
Embodiment
Further describe below in conjunction with 1 pair of optimal way of the present utility model of accompanying drawing.
Referring to Fig. 1, light path receiving trap 1 is made of shell, convex lens 12 and the optical filter 11 of inwall blacking, the incident end that optical fiber 2 is arranged at the focus place of convex lens, optical fiber 2 links to each other the light path receiving trap with spectrometer 3, the exit end of optical fiber 2 is connected with the entrance slit of spectrometer 3, spectrometer 3 is made of grating, collimating mirror and detector, links to each other with control computer 5 through cable 4, and GPS6 links to each other with computing machine.
During work, light path receiving trap 1 is aimed at zenith direction, the diffusion light of the sun that collection is got off from the zenith direction scattering, through the unwanted composition of optical filter 11 filterings, be focused at the incident end of optical fiber 2 by convex lens 12, through after the transmission of optical fiber 2, inject the entrance slit of spectrometer 3, in spectrometer, detect by detector after process collimation, the beam split, spectral signal is transferred to computing machine 5 by cable 4 and carries out spectral manipulation, the inverting pollutant levels, the instrument coordinates position in conjunction with GPS6 provides shows measurement result in real time.
Claims (1)
1. a passive differential optical absorption spectra instrument is characterized in that comprising a light path receiving trap, and this light path receiving trap is made of convex lens and optical filter; A spectrometer, this spectrometer is formed by grating, collimating mirror and detector are integrated; One connects optical fiber, and this optical fiber is the ultraviolet silica fibre, is used to connect light path receiving trap and spectrometer; Said spectrometer links to each other with control computer by cable, and said computing machine is connected with gps system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200707287U CN201051075Y (en) | 2007-06-07 | 2007-06-07 | Passive differential optical absorption spectrum analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200707287U CN201051075Y (en) | 2007-06-07 | 2007-06-07 | Passive differential optical absorption spectrum analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051075Y true CN201051075Y (en) | 2008-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200707287U Expired - Lifetime CN201051075Y (en) | 2007-06-07 | 2007-06-07 | Passive differential optical absorption spectrum analyzer |
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| CN (1) | CN201051075Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871878A (en) * | 2010-06-11 | 2010-10-27 | 江西科技师范学院 | Optical system of spectrophotometer for biochemical analyzer |
| CN102323219A (en) * | 2011-05-30 | 2012-01-18 | 中国科学院合肥物质科学研究院 | Portable device for remotely measuring atmospheric pollution components day and night on basis of natural celestial body light source |
| CN101634626B (en) * | 2009-09-02 | 2012-05-30 | 复旦大学 | Active-passive integrated atmospheric pollution measuring system and measuring method thereof |
| CN108195777A (en) * | 2017-12-07 | 2018-06-22 | 复旦大学 | The multiaxis passive differential absorption spectrum measuring system of state of the sky can be recorded simultaneously |
-
2007
- 2007-06-07 CN CNU2007200707287U patent/CN201051075Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634626B (en) * | 2009-09-02 | 2012-05-30 | 复旦大学 | Active-passive integrated atmospheric pollution measuring system and measuring method thereof |
| CN101871878A (en) * | 2010-06-11 | 2010-10-27 | 江西科技师范学院 | Optical system of spectrophotometer for biochemical analyzer |
| CN101871878B (en) * | 2010-06-11 | 2012-06-20 | 江西科技师范学院 | Optical system of spectrophotometer for biochemical analyzer |
| CN102323219A (en) * | 2011-05-30 | 2012-01-18 | 中国科学院合肥物质科学研究院 | Portable device for remotely measuring atmospheric pollution components day and night on basis of natural celestial body light source |
| CN108195777A (en) * | 2017-12-07 | 2018-06-22 | 复旦大学 | The multiaxis passive differential absorption spectrum measuring system of state of the sky can be recorded simultaneously |
| CN108195777B (en) * | 2017-12-07 | 2020-05-26 | 复旦大学 | Multi-axis passive differential absorption spectrum measuring system capable of simultaneously recording sky condition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI WATERWORKS INVESTMENT + CONSTRUCTION CORP Free format text: FORMER OWNER: FUDAN UNIVERSITY Effective date: 20110629 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200433 NO. 220, HANDAN ROAD, SHANGHAI TO: 200122 ROOM G, 13/F, NO. 985, DONGFANG ROAD, PUDONG NEW DISTRICT, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110629 Address after: 200122, room 13, building 985, Dongfang Road, Shanghai, Pudong New Area. G Patentee after: Shanghai Waterworks Investment & Construction Co., Ltd. Address before: 220 Handan Road, Shanghai, No. 200433 Patentee before: Fudan University |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080423 |
|
| CX01 | Expiry of patent term |