CN105044113B - A kind of sulfur dioxide gas imager - Google Patents
A kind of sulfur dioxide gas imager Download PDFInfo
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- CN105044113B CN105044113B CN201510432326.6A CN201510432326A CN105044113B CN 105044113 B CN105044113 B CN 105044113B CN 201510432326 A CN201510432326 A CN 201510432326A CN 105044113 B CN105044113 B CN 105044113B
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Abstract
A kind of sulfur dioxide imaging telemetering equipment, including ultraviolet preposition telescope, ultraviolet collimating mirror, spike filter, Amici prism, the first ultra-narrow band pass filter, the first imaging lens, the first detector, the second ultra-narrow band pass filter, the second imaging lens, the second detector, computer provided by the invention etc..Ultraviolet difference imaging technique is combined by the device with ultra-narrow band Difference Imaging technology, forms a kind of two dimensional visible sulfur dioxide gas imaging technique means of ultraviolet difference imaging.Compared with prior art, the beneficial effects of the invention are as follows using ultra-narrow band ultraviolet difference imaging technique, it need not scan, the real time imagery of sulfur dioxide gas can be achieved, it is more accurate that difference method measures concentration information, strong antijamming capability solves the problems, such as that prior art real time imagery and accurate measurement can not get both.
Description
Technical field
The present invention relates to optical image technology fields, more particularly to a kind of sulfur dioxide gas imager.
Background technology
Sulfur dioxide is a kind of main atmosphere pollution, is monitored always in recent years to discharge of pollutant sources sulfur dioxide
Carry out the emphasis of environmental monitoring concern.Sulfur dioxide detection for sulfur dioxide (SO2) emissions pollution sources, such as chimney plume, often
With the method for optical telemetry, such as Differential Optical Absorption Spectroscopy, differential absorption lidar method and ultraviolet image method.Wherein difference
Optical absorption spectrometry and differential absorption lidar method all have preferable measurement accuracy, but due to being spot measurement, it is difficult
To be accurately positioned, if to obtain entire plume image, needs to carry out prolonged spot scan and accumulate sulfur dioxide concentration point
Cloth image, can have some difficulties in actual use, and equipment itself is on the one hand needed to have complicated alignment and precision sweep mechanism,
On the other hand for dynamic plume, it cannot achieve real time imagery.Existing ultraviolet image method, using two spectrum channel difference at
Picture, a channel is in the sulfur dioxide characteristic absorption spectrum band range of 280nm~320nm, and a channel is 320nm's or more
Within the scope of non-absorbing band, although two dimensional image can be obtained in real time, since spectral bandwidth is too wide, it is easy by other gases
Or the interference of particulate matter, precision are difficult to improve.Taking into account the accuracy of sulfur dioxide imaging and real-time is one and is badly in need of solving
Problem.
Invention content
The purpose of the present invention is be directed to existing for existing sulfur dioxide detection device detect when be vulnerable to other gases or
The interference of particulate matter cannot achieve real time imagery, the problems such as measurement error is larger, provide a kind of sulfur dioxide gas imaging
Instrument.The device effectively combines ultraviolet difference imaging technique and ultra-narrow band Difference Imaging technology, forms a kind of ultraviolet difference imaging
Two dimensional visible sulfur dioxide gas imaging technique means, effectively solve the standard when prior art is difficult to take into account sulfur dioxide imaging
The problem of true property and real-time, have many advantages, such as device structure simply, imaging precision higher, anti-interference ability is stronger.
The technical solution adopted by the present invention is as follows：
For the purpose for realizing above-mentioned, a kind of sulfur dioxide imaging telemetering equipment provided by the invention, including ultraviolet preposition prestige
Remote mirror, ultraviolet collimating mirror, spike filter, Amici prism, the first ultra-narrow band pass filter, the first imaging lens, the first detector, the
Two ultra-narrow band pass filters, the second imaging lens, the second detector, computer etc., the device is by ultraviolet difference imaging technique and ultra-narrow
Band Difference Imaging technology is combined, and realizes the real time imagery of sulfur dioxide gas, and it is dense so that difference method is measured sulfur dioxide
It is more accurate to spend information, strong antijamming capability.
Test method of the present invention is：Target sulfur dioxide plume is imaged in primary picture by ultraviolet preposition telescope
Face, ultraviolet collimating mirror collimate imaging beam, and spike filter is put into collimated light path, make spectral coverage spectral transmission interested,
Thereafter an Amici prism is placed in light path, collimated light beam is divided into the two-way of identical energy, and a curb original optical path exports, all the way partially
Turn 90 degree of direction outputs.Be sequentially placed into along the light path that original optical path exports the first ultra-narrow band pass filter, the first imaging lens and
The photosurface of first face battle array photodetector, the first face battle array photodetector is overlapped with the image planes of the first imaging lens.At 90 degree
It deflects and is sequentially placed into the second ultra-narrow band pass filter, the second imaging lens and the second face battle array photodetector in the light path of output, second
The photosurface of face battle array photodetector is overlapped with the image planes of the second imaging lens.By the battle array photodetection of the first face of computer synchronous control
Device and the second face battle array photodetector, obtain two width difference ultra-narrow band images, handle two width figures, obtain in a computer
It takes the two dimensional image comprising sulfur dioxide concentration distributed intelligence and shows.
It is the ultraviolet preposition telescope, ultraviolet collimating mirror, Amici prism, beam splitting coating, the first ultraviolet imagery mirror, second purple
The spectral transmittance of outer imaging lens includes at least 280nm~320nm spectral regions；
The centre wavelength of the spike filter is between 280nm~320nm, and full width at half maximum is within the scope of 5~10nm.
The centre wavelength of first ultra-narrow band pass filter is with sulfur dioxide in 280nm~320nm spectral regions
One absorption peak overlaps, and full width at half maximum is less than 0.5nm, the centre wavelength of the second ultra-narrow band pass filter and the first ultra-narrow band pass filter
Corresponding first neighbouring absorption paddy of absorption peak long wave direction overlaps, and full width at half maximum is less than 0.5nm.
First ultra-narrow band pass filter and the second ultra-narrow band pass filter penetrates wavelength in above-mentioned spike filter
Transmission spectral region in.
The first ultraviolet imagery mirror and the second ultraviolet imagery mirror parameter is identical.
The first face battle array photodetector and the second face battle array photodetector has within the scope of 280nm~320nm
Photoelectric respone.
The computer includes to the processing of two images：(1) original image is corrected, including geometric correction,
Flat field correction and radiancy correction；(2) the second spy face battle array photoelectric measuring device acquisition image the first face battle array photodetector is subtracted to adopt
Collect image, and result is taken absolute value, obtains difference image；(3) physical model in computer is combined, it will be in difference image
Pixel value corresponds to specific gas concentration value, and assigns different colors, and obtaining can show that the puppet of Gas concentration distribution is color
Chromatic graph；(4) face battle array photoelectric measuring device acquisition image or the second face battle array photodetector acquisition image are visited by first or the first face battle array is visited
The image for surveying device acquisition adds the image addition of the second planar array detector acquisition, converts the image into gray level image, and with upper one
Pseudo color image in step carries out image co-registration, and the image obtained at this time had both included surrounding scene or included the titanium dioxide of pseudo-colours
Sulphur plume is distributed.
Compared with prior art, the beneficial effects of the invention are as follows realize sulfur dioxide gas using ultra-narrow band Difference Imaging technology
Body is imaged, and differential technique measurement concentration information is more accurate, strong antijamming capability.Need not scan, can real time imagery, solve
The problem of existing method real time imagery and accurate measurement can not get both.
Description of the drawings
Fig. 1 is a kind of sulfur dioxide gas imager schematic diagram；
In figure 1 be come from the light beam of target, 2 be ultraviolet preposition telescope, 3 be an image planes, 4 be ultraviolet collimating mirror, 5
It is Amici prism for spike filter, 6,7 be beam splitting coating, 8 be the first ultra-narrow band pass filter, 9 be the first ultraviolet imagery mirror, 10 is
First face battle array photodetector, 11 are the second ultra-narrow band pass filter, and 12 be the second ultraviolet imagery mirror, and 13 visit for the second face battle array photoelectricity
Survey device, 14 are computer.
Fig. 2 is ultra-narrow band pass filter schematic diagram.
Specific implementation mode
Technical scheme in the embodiment of the invention is clearly and completely described below in conjunction with the accompanying drawings, it is clear that described
Embodiment be only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained without making creative work, belongs to guarantor of the present invention
The range of shield.
A kind of sulfur dioxide gas imager, including ultraviolet preposition telescope 2, ultraviolet collimating mirror 4, spike filter 5, point
Light prism 6, the first ultra-narrow band pass filter 8, the first imaging lens 9, the first face battle array photodetector 10, the second ultra-narrow band pass filter
11, the second imaging lens 12, the second face 13 detector of battle array photoelectricity, computer 14.
In the present embodiment, ultraviolet preposition telescope 2, ultraviolet collimating mirror 4, Amici prism 6, beam splitting coating 7, first it is ultraviolet at
As the spectral transmittance of mirror 9, the second ultraviolet imagery mirror 12 includes at least 280nm~320nm spectral regions；In spike filter
Cardiac wave is grown between 280nm~320nm, and full width at half maximum is within the scope of 5~10nm.Preferably, it is selected in one in the present embodiment
The a length of 303nm of cardiac wave, full width at half maximum are the spike filter of 5nm.
In the present embodiment, the centre wavelength and sulfur dioxide of the first ultra-narrow band pass filter 8 are in 280nm~320nm spectrum models
An absorption peak in enclosing overlaps, and full width at half maximum is less than 0.5nm, centre wavelength and the first ultra-narrow of the second ultra-narrow band pass filter 11
The neighbouring absorption paddy of absorption peak long wave direction first is corresponded to optical filter 8 to overlap, full width at half maximum is less than 0.5nm.Preferably,
One ultra-narrow band pass filter, 8 optional centre wavelength is 302nm, and full width at half maximum 0.5nm, the second ultra-narrow band pass filter 11 is optionally
Centre wavelength is 303.5nm, halfwidth 0.5nm.As shown in Figure 2.
In the present embodiment, the first ultraviolet imagery mirror 9 is identical with 12 parameter of the second ultraviolet imagery mirror, wherein ultraviolet lens
Focal length is 50mm, there is good transmitance within the scope of 280nm~320nm.
In the present embodiment, the first face battle array photodetector 10 and the second face battle array photodetector 13 are in 280nm~320nm models
There is photoelectric respone in enclosing, ultraviolet enhancement CCD area array cameras can be selected.
In the present embodiment, computer 14 can use common bench or portable computer.
The testing procedure of the present embodiment is:
1) target sulfur dioxide plume is imaged in an image planes by ultraviolet preposition telescope 2；
2) by ultraviolet collimating mirror 4, spike filter 5 and Amici prism 6, collimated light beam is divided into the two of identical energy
Road, curb original optical path output deflect 90 degree of direction outputs all the way；
3) by 14 the first face of synchronous control of computer battle array photodetector 10 and the second face battle array photodetector 13, two are obtained
Width difference ultra-narrow band image, and two width figures are handled by computer 14, it includes sulfur dioxide concentration distributed intelligence to obtain
Two dimensional image.
Example the above is only the implementation of the present invention is not intended to restrict the invention, every technique according to the invention examination
Any trickle amendment, equivalent replacement or improvement of the paper to made by above example, should be included in technical solution of the present invention
Within protection domain.
Claims (3)
1. a kind of sulfur dioxide gas imager, which is characterized in that the device includes ultraviolet preposition telescope (2), ultraviolet collimation
Mirror (4), spike filter (5), Amici prism (6), the first ultra-narrow band pass filter (8), the first imaging lens (9), the first face battle array light
Electric explorer (10), the second imaging lens (12), the second face battle array photodetector (13), calculates the second ultra-narrow band pass filter (11)
Machine (14)；Wherein the first ultra-narrow band pass filter (8), the first imaging lens (9) and the first face battle array photodetector (10) are along original optical path
It is sequentially placed, the second ultra-narrow band pass filter (11), the second imaging lens (12) and the second face battle array photodetector (13) are at 90 degree
It deflects and is sequentially placed in the light path of output, and by computer (14) first face of synchronous control battle array photodetector (10) and the second face
Battle array photodetector (13)；
The ultraviolet preposition telescope (2), ultraviolet collimating mirror (4), Amici prism (6), the first imaging lens (9), the second imaging lens
(12) spectral transmittance spectral region includes at least 280nm~320nm；
The centre wavelength of first ultra-narrow band pass filter (8) and the second ultra-narrow band pass filter (11) 280nm~320nm it
Between, full width at half maximum is within the scope of 5~10nm；
One with sulfur dioxide in 280nm~320nm spectral regions of the centre wavelength of first ultra-narrow band pass filter (8)
Absorption peak overlaps, and full width at half maximum is less than 0.5nm, centre wavelength and the first ultra-narrow band pass filter of the second ultra-narrow band pass filter (11)
(8) corresponding first neighbouring absorption paddy of absorption peak long wave direction overlaps, and full width at half maximum is less than 0.5nm.
2. a kind of sulfur dioxide gas imager according to claim 1, which is characterized in that the first face battle array photodetector
(10) and the operating spectral range of the second face battle array photodetector (13) includes at least 280nm~320nm.
3. a kind of testing procedure of sulfur dioxide gas imager according to claim 1, it is characterised in that:
1) target sulfur dioxide plume is imaged in by an image planes by ultraviolet preposition telescope (2)；
2) by ultraviolet collimating mirror (4), spike filter (5) and Amici prism (6), collimated light beam is divided into the two of identical energy
Road, curb original optical path output deflect 90 degree of direction outputs all the way；
3) it by computer (14) first face of synchronous control battle array photodetector (10) and the second face battle array photodetector (13), obtains
Two width difference ultra-narrow band images, and two width figures are handled in a computer, it obtains comprising sulfur dioxide concentration distribution letter
The two dimensional image of breath.
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| CN201510432326.6A CN105044113B (en) | 2015-07-21 | 2015-07-21 | A kind of sulfur dioxide gas imager |
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| CN201510432326.6A CN105044113B (en) | 2015-07-21 | 2015-07-21 | A kind of sulfur dioxide gas imager |
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| CN105044113B true CN105044113B (en) | 2018-10-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106404700A (en) * | 2016-08-25 | 2017-02-15 | 青岛海纳光电环保有限公司 | Gas telemetering device |
| US11202062B2 (en) * | 2017-11-21 | 2021-12-14 | University Of New Hampshire | Methods and systems of determining quantum efficiency of a camera |
| CN109239001B (en) * | 2018-09-17 | 2020-11-03 | 中国科学院武汉物理与数学研究所 | Remote sensing monitoring device and method for absorption, filtering and imaging of tail gas difference of motor vehicle |
| CN110542663A (en) * | 2019-09-03 | 2019-12-06 | 中国科学院合肥物质科学研究院 | Portable sulfur dioxide two-dimensional distribution rapid detection device |
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Effective date of registration: 20221020 Address after: 266000 room 205, building 1, 61 Guangsheng Road, high tech Zone, Qingdao, Shandong Province Patentee after: Qingdao Zhongke Zhifu Photoelectric Technology Co.,Ltd. Address before: 266109 No. 61, Guangsheng Road, national high tech Industrial Development Zone, Qingdao, Shandong Patentee before: QINGDAO ACADEMY FOR OPTO-ELECTRONICS ENGINEERING |