CN109187359A - Ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring device and method - Google Patents
Ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring device and method Download PDFInfo
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- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses ship exhaust emission gas residual quantity to absorb optical filtering Imaging remote sensing monitoring device, including theodolite, the Imaging remote sensing monitoring unit, signal processing unit, laser range finder and the camera that are mounted on theodolite；Imaging remote sensing monitoring unit includes imaging lens, is divided into reflected light and transmitted light through spectroscope through the light of imaging lens, reflected light is successively imaged after the first molecule bubble, the first optical filter by the first imaging detector；Transmitted light is successively imaged after the second molecule bubble, the second optical filter by the second imaging detector.It also discloses ship exhaust emission gas residual quantity and absorbs optical filtering Imaging remote sensing monitoring method, the present invention has many advantages, such as that monitoring precision is high, data discrete degree is small, anti-interference rejection ability is strong, strong environmental adaptability, monitoring sensitivity are high and result is visual good.
Description
Technical field
The present invention relates to Pollution From Ships gas emission monitoring fields, and in particular to ship exhaust emission gas residual quantity absorbs filter
Light Imaging remote sensing monitoring device further relates to ship exhaust emission gas residual quantity and absorbs optical filtering Imaging remote sensing monitoring method.
Background technique
With the development of traffic transporting technology and demand, the discharge of Pollution From Ships gas increasingly increases the specific gravity of atmosphere pollution
Add, but ship distribution is wide, mobility is strong, and the invisible shadow of polluted gas that is discharged, variation are fast, are the reality of ship flue gas emission
When, operating condition detection bring very big difficulty, be supervisory system construction technical bottleneck.
Since the detection difficulty discharged to Pollution From Ships gas is larger, MARPOL pact just requires the side using oil product detection
Formula, i.e., by pollutant load in detection fuel oil, such as: regulation fuel oil sulfur content must not exceed 4.5%m/m.Such regulation is real
Category is haveed no alternative but, and there is also irrationalities, because marine fuel oil even sulfur content is higher, if ship takes desulfurization, technology is arranged
It applies, as long as having accomplished that low-sulfur polluted gas discharges, reduces the pollution to atmosphere, the ability that should also be permission is right.Take this
Regulation can not control the discharge of nitrogen oxides, because the nitrogen of nitrogen oxides generated on the one hand in fuel oil contains
It measures, 78% nitrogen enters combustion chamber in another aspect air, under high-temperature and high-pressure conditions, also produces nitrogen oxides, it is desired nonetheless to
The discharge of nitrogen oxides could be more reasonably controlled by the nitrogen oxides in detection Pollution From Ships gas discharge, then MARPOL
Pact is it further provides that such as: when rated engine speed n < 130rpm, the Ith grade requires 17.0 < g/kwh of emission limits of nitrogen oxides, etc.
Deng.The detection of the methods of chemistry, spectrum or amount is carried out by stack sampling, although precision is high, exceeded identification is accurate, ship
Very big from stack sampling detection difficulty, testing staff is difficult to detection of going ashore under driving cycle, also than relatively time-consuming, laborious, efficiency
Lowly, and most not guilty non-exceeded ships are also forced detection, consume a large amount of meaningless manpower and material resources.
(the Plume Segmentation from UV Camera Images for SO of document 12Emission Rate
Quantification on Cloud Days, remote sensing, 2017,9,517) use a kind of chimney SO2Discharge is purple
The method of external spectrum Imaging remote sensing detection, this method are harsher to the requirement of sky background condition, need to have on high
Used under even cloud distribution occasion, if sky background light unevenly if be difficult to accurately measure.
Document 2 (vehicle-mounted sulfur dioxide Differential Absorption Laser Radar System, photonics journal, the 7th phase of volume 2017,46) uses
A kind of SO in laser differential absorption techniques atmospheric sounding2.But since ship discharge plume spatial distribution has uncertainty, and
And plume shape is also changeful, extremely uneven, laser beam passes through the plume of ship discharge sometimes, sometimes laser beam even without
Plume is accurately passed through, the result monitored in this way is: if laser beam passes through the denseer position of plume, monitoring that tail gas is arranged
It is high-volume very big；If laser beam passes through the leaner position of plume, exhaust emissions amount very little is monitored；If laser beam does not have
Plume is accurately passed through, then monitoring is less than exhaust emissions.In this way, even to same ship, identical driving conditions and ring
Under the conditions of border, monitoring result also has very big difference, causes the dispersion of monitoring data very big, it is difficult to the ship root in traveling
Accurate tail gas pollution discharge magnitude is obtained according to disposable monitoring result.
(the An Infrared Hyperspectral Sensor for Remote Sensing of Gases in of document 3
The Atmosphere, Proc.of SPIE Vol.7827 78270J, 2010) Fourier Transform Spectroscopy is used, it realizes
To the SO of ship discharge2Imaging detection, detection result are intuitive as it can be seen that but core component Fourier transform spectrometer, machining accuracy
It is required that it is high, involve great expense, and extremely sensitive to variation of ambient temperature and vibration, when work, also needs deep refrigerating, application
It is difficult.
The nineties in last century, a kind of method for developing characterization of molecules spectral difference amount absorption monitoring gas, this method are answered
For spaceborne earth atmosphere pollution monitoring (bibliography 4:A review of 9-year performance and
Operation of the MOPITT instrument, Advances in Space Research 45 (2010) 760-
774), natural gas leakage monitoring (bibliography 5:Results of field trials of realsens, an airborne
Natural gas leak detection technology, International Gas Union Research
Conference, 2008), toxic and harmful gas monitors (bibliography 6:Performance of the FIRST, a
Longwave Infrared Hyperspectral Imaging Sensor, SPIE 6398-28,2006).But without one kind
It can be directly suitable for the emission monitoring for the Pollution From Ships gas being applied under actual conditions.
Summary of the invention
It is an object of the invention to overcome drawbacks described above of the existing technology, the suction of ship exhaust emission gas residual quantity is provided
Optical filtering Imaging remote sensing monitoring device is received, also offer ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring method, this
Invention uses two optical channels, and one of optical channel uses characterization of molecules spectral absorption and bandpass filter, another light
Channel is learned only with bandpass filter, two optics carry out remotely sensed image to the pollutant component of Pollution From Ships gas discharge respectively, then
To two images carry out difference, obtain only have polluted gas ingredient spatial distribution image, according to image information, atmospheric transmittance and
The parameters such as distance calculate the discharge amount of polluted gas.With accuracy is high, data discrete degree is small, anti-interference rejection ability is strong,
The advantages that strong environmental adaptability, monitoring sensitivity are high and result is visual good.
To achieve the goals above, the present invention adopts the following technical scheme:
Ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring device, including theodolite, further includes being mounted on
Imaging remote sensing monitoring unit, signal processing unit, laser range finder and camera on theodolite；
Imaging remote sensing monitoring unit includes imaging lens, is divided into reflected light and transmission through spectroscope through the light of imaging lens
Light, reflected light are successively imaged after the first molecule bubble, the first optical filter by the first imaging detector；Transmitted light successively passes through
It is imaged after two molecules bubble, the second optical filter by the second imaging detector；First imaging detector, the second imaging detector, laser
Rangefinder, camera, theodolite are electrically connected with signal processing unit respectively.
The field of view of receiver of imaging lens as described above is 8~20 degree；Spectroscopical splitting ratio is 1:1.
First molecule bubble and the second molecule bubble as described above include in hollow cylinder and sealed cylinder both ends
Infrared glass window.
The length of the inner space of first molecule bubble and the second molecule bubble as described above is 20~50mm.
Filling gas is filled in second molecule bubble as described above.
Filling gas as described above is SO2Gas, the air pressure of filling gas are 30000~60000pa；First optical filter
Central wavelength with the second optical filter is 7.3 μm, and transmission bandwidth is 400nm；
Alternatively, filling gas is CO gas, the air pressure of filling gas is 15000~30000pa；First optical filter and second
The central wavelength of optical filter is 4.65 μm, and transmission bandwidth is 700nm；
Alternatively, filling gas is CO2Gas, the air pressure of filling gas are 15000~30000pa；First optical filter and
The central wavelength of two optical filters is 4.2 μm, and transmission bandwidth is 200nm；
Alternatively, filling gas is NO gas, the air pressure of filling gas is 45000~90000pa, the first optical filter and second
The central wavelength of optical filter is 5.33 μm, and transmission bandwidth is 400nm；
Alternatively, filling gas is NO2Gas, the air pressure of filling gas are 15000~30000pa, the first optical filter and the
The central wavelength of two optical filters is 6.25 μm, and transmission bandwidth is 500nm.
Ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring method, comprising the following steps:
Step 1, signal processing unit control theodolite horizontally rotate and pitch rotation, video camera is to passing ship on the water surface
Oceangoing ship carries out imaging and obtains ship image,
Step 2, signal processing unit identify that signal processing unit is recorded to the designation of ship according to ship image
The designation of ship；
Step 3, signal processing unit control theodolite horizontally rotate and pitch rotation, the chimney of ship is searched for, when searching
Rope to search ship chimney when, laser range finder measurement obtain the distance between Imaging remote sensing monitoring unit and chimney R, and general
Distance R value sends signal processing unit to；
Step 4, signal processing unit control theodolite horizontally rotate and pitch rotation, by ship discharge flue gas plume
It is adjusted to the visual field center of imaging lens, flue gas plume is imaged by the first imaging detector and the second imaging detector, respectively
Image X and image Y is obtained, and sends image X and image Y to signal processing unit；
Step 5, signal processing unit generate image Z, and the signal value of each pixel of image Z is the corresponding pixel of image X
The corresponding pixel of signal value subtracted image Y signal value；
Step 6 obtains pollution identical with filling gas ingredient in ship chimney exhaust emission gas by following formula
The quality m of gas:
Wherein, IxyThe signal value of y row pixel is arranged for xth on image Z；
N is total columns of image Z；
M is total line number of image Z；
α be the pixel of image Z signal value in ship chimney exhaust emission gas and the identical gas of filling gas ingredient
Conversion coefficient between the quality of body；
β is transmitance of the atmosphere to filling gas radiation spectrum；
R is the distance between Imaging remote sensing monitoring unit and chimney.
The present invention compared with the existing technology, has the advantages that
1) monitoring data dispersion is small, effectively improves monitoring precision: polluted gas component space distribution map obtained
Picture covers one section of biggish spatial volume of ship plume, no matter plume concentration is spatially distributed how uneven, equal quilt
Imaging: Monitoring obtains, and the instantaneous total emission volumn of ship can integrate to obtain total amount according to image data.Avoiding problems because of monitoring
The difference of spatial position and bring data discrete problem, are greatly reduced the dispersion of monitoring data, it is accurate to improve monitoring
Degree.
2) background interference rejection ability is strong, environmental disturbances influence is effectively reduced: using two discrepant characterization of molecules light
Spectrum monitoring optical channel imaging, difference is only the difference to monitored gas componant, and to other all ambient light interferences
Caused common-mode signal, on two kinds of images be it is identical, after common-mode differential, ambient light interference signal is removed,
The image that difference obtains only has difference mode signal, i.e. the only gas componant image of characterization of molecules Spectrum Formation, effectively reduces ring
The influence of border interference.
3) strong environmental adaptability, the service life is long, low in energy consumption: the present invention uses imaging and passive imaging remote sensing monitoring, core monitoring portion
Part is insensitive to variation of ambient temperature, small on monitoring accuracy and accuracy influence, and passive reception monitoring emits without active, power consumption
Low, the service life is long.
4) monitoring sensitivity is high: infrared characterization of molecules spectrum in selection is the fundamental radiation light of polluted gas molecular spectrum
Spectrum, fundamental radiation improve the 3-6 order of magnitude compared with the general radio-frequency radiation signal of near-infrared, can greatly improve the monitoring sensitivity of signal.
5) visuality of monitoring result is good: although people can be by examining some shapes it can be seen that ship flue gas
State, but pollutant component content therein can not be observed by the naked eye, the present invention is in addition to providing component content in flue gas
Numerical value, the spatial concentration distribution image of ingredient in tail gas can also be provided, make the shipowner of monitored ship to monitoring result more
It is acceptant.
Detailed description of the invention
Fig. 1 is the mounting arrangement schematic diagram that ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring device.
Fig. 2 is that ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring device composed structure schematic diagram.
Fig. 3 is characterization of molecules spectrum, background interference light spectrum and optical filtering transmitted spectrum schematic diagram.
Fig. 4 is distribution schematic diagram of the ship plume in monitoring image.
Wherein, 1- Imaging remote sensing monitoring unit, 2- signal processing unit, 3- laser range finder, 4- video camera, 5- longitude and latitude
Instrument, 101- imaging lens, 102- spectroscope, the first molecule of 103- bubble, the first optical filter of 104-, the first imaging detector of 105-,
The second molecule of 106- bubble, the second optical filter of 107-, the second imaging detector of 108-, 201-SO2Characterization of molecules spectrum, 202- background
Interfere light spectrum, 203- optical filtering transmitted spectrum.
Specific embodiment
For the ease of those of ordinary skill in the art understand and implement the present invention, below with reference to embodiment to the present invention make into
The detailed description of one step, it should be understood that implementation example described herein is merely to illustrate and explain the present invention, and is not used to limit
The fixed present invention.
As depicted in figs. 1 and 2, ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring device, including longitude and latitude
Instrument 5 further includes the Imaging remote sensing monitoring unit 1 being mounted on theodolite 5, signal processing unit 2, laser range finder 3 and camera shooting
First 4.
Imaging remote sensing monitoring unit 1 includes imaging lens 101, and through the light of imaging lens 101, to divide through spectroscope 102 be anti-
Penetrate light and transmitted light, reflected light successively after the first molecule steeps the 103, first optical filter 104 by the first imaging detector 105 at
Picture；Transmitted light is successively imaged after the second molecule steeps the 106, second optical filter 107 by the second imaging detector 108；First at
As detector 105, the second imaging detector 108, laser range finder 3, camera 4, theodolite 5 respectively with signal processing unit 2
It is electrically connected.
The field of view of receiver of imaging lens 101 is 8~20 degree；The splitting ratio of spectroscope 102 is 1:1；First molecule steeps 103 Hes
Second molecule bubble 106 includes the middle infrared glass window at hollow cylinder and sealed cylinder both ends, and the first molecule steeps 103 Hes
The inner space length of second molecule bubble 106 is 20~50mm,
Filling gas is filled in second molecule bubble 106.Filling gas can be dirty with the discharge of ship chimney to be detected
The polluted gas ingredient for contaminating a certain type in gas is identical.
Filling gas is SO2Gas, the air pressure of filling gas are 30000~60000pa；First optical filter 104 and second
The central wavelength of optical filter 107 is 7.3 μm, and transmission bandwidth is 400nm,
Alternatively, filling gas is CO gas, the air pressure of filling gas is 15000~30000pa；First optical filter, 104 He
The central wavelength of second optical filter 107 is 4.65 μm, and transmission bandwidth is 700nm,
Alternatively, filling gas is CO2Gas, the air pressure of filling gas are 15000~30000pa；First optical filter, 104 He
The central wavelength of second optical filter 107 is 4.2 μm, and transmission bandwidth is 200nm,
Alternatively, filling gas is NO gas, the air pressure of filling gas is 45000~90000pa, 104 He of the first optical filter
The central wavelength of second optical filter 107 is 5.33 μm, and transmission bandwidth is 400nm,
Alternatively, filling gas is NO2Gas, the air pressure of filling gas are 15000~30000pa, 104 He of the first optical filter
The central wavelength of second optical filter 107 is 6.25 μm, and transmission bandwidth is 500nm.
Imaging remote sensing monitoring unit 1, laser range finder 3 are parallel with the reception optical axis of video camera 4, and output signal is all connected to
Signal processing unit 2, the control that signal processing unit 2 exports are signally attached to theodolite 5；Imaging remote sensing monitoring unit 1, signal
Processing unit 2, laser range finder 3 and video camera 4 are rigidly mounted together on theodolite 5.
The field of view of receiver of video camera 4 is 1.5~3 times of 101 field of view of receiver of imaging lens.
Ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring method, comprising the following steps:
Step 1, apparatus of the present invention are installed on harbour or law enforcement monitoring ship, and signal processing unit 2 controls theodolite 5
Horizontally rotate and pitch rotation, video camera 4 carry out imaging to shippping traffic on the water surface and obtain ship image；
Step 2, signal processing unit 2 identify that signal processing unit 2 is recorded according to ship image to the designation of ship
The designation (i.e. the identity information of ship) of lower ship；
Step 3, signal processing unit 2 control theodolite 5 horizontally rotate and pitch rotation, search for the chimney of ship, when
When searching the chimney of search ship, the measurement of laser range finder 3 obtains the distance between Imaging remote sensing monitoring unit 1 and chimney R,
And send distance R value to signal processing unit 2；
Step 4, signal processing unit 2 control theodolite 5 horizontally rotate and pitch rotation, by ship discharge flue gas cigarette
Plumage is adjusted to the visual field center of imaging lens 101, by the first imaging detector 105 and the second imaging detector 108 to flue gas cigarette
Plumage imaging, obtains image X and image Y, and send image X and image Y to signal processing unit 2, wherein image X and figure respectively
As Y is gray level image.
The polluted gas SO discharged below with ship2For, to illustrate the information and SO in image X and image Y2Discharge
The calculating method of amount:
As shown in figure 3, the SO in ship discharge plume2Characterization of molecules spectrum 201 be in pectination discrete feature, sky, cloud,
Mist, hull, each ingredient in atmosphere remove SO in ship plume2With all background interference light spectrum 202 of external radiation with environment difference
And change, wherein the B section spectrum and SO of background interference light spectrum 2022Characterization of molecules spectrum 201 overlaps on spectrum position
Together, as with interior interference；A sections of spectrum, C sections of spectrum are in SO2Other than characterization of molecules spectrum 201, as out-of-band interference；First
203 transmission bands of optical filtering transmitted spectrum of optical filter 104 and the second optical filter 107 just cover SO2Characterization of molecules spectrum 201.
Ship discharges polluted gas molecule SO in plume2It is connect with the infrared light of other ingredients radiation by imaging lens 101
It receives, while received also by the institute of imaging lens 101: the infrared light of each ingredient radiation in sky, cloud, mist, hull and atmosphere,
All these light into imaging lens 101 are divided into two parts through spectroscope 102: where the reflected light of spectroscope 102
Through the first molecule bubble 103, then through 104 bandpass filter of the first optical filter, by the first optical filter 104 by background interference light spectrum
202 curb with outer A sections of spectrum, C sections of spectrum, is made of through the optical signal of the first optical filter 104 two parts: SO2Molecule
Characteristic spectrum 201 and background interference light spectrum 202 with interior B sections of spectral signal；Through the first optical filter 104 optical signal through
One imaging detector 105 carries out photoelectric conversion, obtains image X, is SO on image X2Characterization of molecules spectrum 201 and background interference light
Image formed by the B section spectral signal of spectrum 202；
When the transmitted light of spectroscope 102 is by the second molecule bubble 106, by the internal SO filled2Gas molecules sorb, by vapour
SO in tail gas plume2201 signal of characterization of molecules spectrum fully absorbs, remaining spectral signal enters the second optical filter 107
Bandpass filter, by the second optical filter 107 curbing with outer A sections of spectrum, C sections of spectrum by background interference light spectrum 202, through
The optical signal of two optical filters 107 only has the B section spectral signal of background interference light spectrum 202；Through the light letter of the second optical filter 107
Number through the second imaging detector 108 carry out photoelectric conversion, obtain image Y, image Y be background interference light spectrum 202 B section spectrum
Image formed by signal.
Step 5, signal processing unit 2 carry out each picture that calculation processing generates image Z: image Z to image X and image Y
The signal value of member is the signal value of the corresponding pixel of signal value subtracted image Y of the corresponding pixel of image X,
In the present embodiment, just there was only SO on image Z2Characterization of molecules spectrum 201 at image.Image Z is ship tail
SO in gas plume2Spatial distribution image, as shown in Figure 4.
Step 6 obtains pollution identical with filling gas ingredient in ship chimney exhaust emission gas by following formula
The quality m of gas.
Wherein, IxyThe signal value of y row pixel is arranged for xth on image Z；
N is total columns of image Z；
M is total line number of image Z；
α be the pixel of image Z signal value in ship chimney exhaust emission gas and the identical gas of filling gas ingredient
Conversion coefficient between the quality of body；
β is transmitance of the atmosphere to filling gas radiation spectrum；
R is the distance between Imaging remote sensing monitoring unit 1 and chimney.
In the present embodiment, filling gas SO2Gas, what is obtained in step 6 is in ship chimney exhaust emission gas
SO2The quality of gas.
Replacing the filling gas in the second molecule bubble 106 is CO or CO2Or NO or NO2, can be discharged in the hope of ship chimney dirty
Contaminate the CO or CO in gas2Or NO or NO2Quality.
Step 7, signal processing unit 2 export the quality of the designation of ship, image Z and ship chimney polluted gas.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications, supplement to described specific embodiment or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (7)
1. ship exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring device, including theodolite (5), which is characterized in that
Further include the Imaging remote sensing monitoring unit (1) being mounted on theodolite (5), signal processing unit (2), laser range finder (3) and
Camera (4)；
Imaging remote sensing monitoring unit (1) includes imaging lens (101), is divided through the light of imaging lens (101) through spectroscope (102)
For reflected light and transmitted light, reflected light is successively visited after the first molecule steeps (103), the first optical filter (104) by the first imaging
Survey device (105) imaging；Transmitted light is successively by the second imaging detector after the second molecule steeps (106), the second optical filter (107)
(108) it is imaged；First imaging detector (105), the second imaging detector (108), laser range finder (3), camera (4), warp
Latitude instrument (5) is electrically connected with signal processing unit (2) respectively.
2. ship exhaust emission gas residual quantity according to claim 1 absorbs optical filtering Imaging remote sensing monitoring device, feature
It is, the field of view of receiver of the imaging lens (101) is 8~20 degree；The splitting ratio of spectroscope (102) is 1:1.
3. ship exhaust emission gas residual quantity according to claim 1 absorbs optical filtering Imaging remote sensing monitoring device, feature
It is, the first molecule bubble (103) and the second molecule bubble (106) include hollow cylinder and sealed cylinder both ends
Middle infrared glass window.
4. ship exhaust emission gas residual quantity according to claim 3 absorbs optical filtering Imaging remote sensing monitoring device, feature
It is, the length of the inner space of the first molecule bubble (103) and the second molecule bubble (106) is 20~50mm.
5. ship exhaust emission gas residual quantity according to claim 1 absorbs optical filtering Imaging remote sensing monitoring device, feature
It is, is filled with filling gas in the second molecule bubble (106).
6. ship exhaust emission gas residual quantity according to claim 3 absorbs optical filtering Imaging remote sensing monitoring device, feature
It is, the filling gas is SO2Gas, the air pressure of filling gas are 30000~60000pa；First optical filter (104) and
The central wavelength of second optical filter (107) is 7.3 μm, and transmission bandwidth is 400nm；
Alternatively, filling gas is CO gas, the air pressure of filling gas is 15000~30000pa；First optical filter (104) and
The central wavelength of two optical filters (107) is 4.65 μm, and transmission bandwidth is 700nm；
Alternatively, filling gas is CO2Gas, the air pressure of filling gas are 15000~30000pa；First optical filter (104) and
The central wavelength of two optical filters (107) is 4.2 μm, and transmission bandwidth is 200nm；
Alternatively, filling gas is NO gas, the air pressure of filling gas is 45000~90000pa, the first optical filter (104) and the
The central wavelength of two optical filters (107) is 5.33 μm, and transmission bandwidth is 400nm；
Alternatively, filling gas is NO2Gas, the air pressure of filling gas are 15000~30000pa, the first optical filter (104) and the
The central wavelength of two optical filters (107) is 6.25 μm, and transmission bandwidth is 500nm.
7. absorbing optical filtering Imaging remote sensing monitoring device using the ship exhaust emission gas residual quantity described in claim 5 carries out ship
Exhaust emission gas residual quantity absorbs optical filtering Imaging remote sensing monitoring method, which comprises the following steps:
Step 1, signal processing unit (2) control theodolite (5) horizontally rotate and pitch rotation, video camera (4) is on the water surface
Shippping traffic carries out imaging and obtains ship image,
Step 2, signal processing unit (2) identify that signal processing unit (2) is recorded according to ship image to the designation of ship
The designation of lower ship；
Step 3, signal processing unit (2) control theodolite (5) horizontally rotate and pitch rotation, search for the chimney of ship, when
When searching the chimney of search ship, laser range finder (3) measurement obtain between Imaging remote sensing monitoring unit (1) and chimney away from
Signal processing unit (2) are sent to from R, and by distance R value；
Step 4, signal processing unit (2) control theodolite (5) horizontally rotate and pitch rotation, by ship discharge flue gas cigarette
Plumage is adjusted to the visual field center of imaging lens (101), right by the first imaging detector (105) and the second imaging detector (108)
The imaging of flue gas plume, obtains image X and image Y, and send image X and image Y to signal processing unit (2) respectively；
Step 5, signal processing unit (2) generate image Z, and the signal value of each pixel of image Z is the corresponding pixel of image X
The signal value of the corresponding pixel of signal value subtracted image Y；
Step 6 obtains polluted gas identical with filling gas ingredient in ship chimney exhaust emission gas by following formula
Quality m:
Wherein, IxyThe signal value of y row pixel is arranged for xth on image Z；
N is total columns of image Z；
M is total line number of image Z；
α be the pixel of image Z signal value in ship chimney exhaust emission gas and the identical gas of filling gas ingredient
Conversion coefficient between quality；
β is transmitance of the atmosphere to filling gas radiation spectrum；
R is the distance between Imaging remote sensing monitoring unit (1) and chimney.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031420A (en) * | 2019-04-18 | 2019-07-19 | 广州嘉航通信科技有限公司 | A kind of ship discharge telemetry system |
| CN110658150A (en) * | 2019-10-14 | 2020-01-07 | 武汉敢为科技有限公司 | Low-concentration CO mechanical modulation gas sensor |
| CN113008831A (en) * | 2021-02-26 | 2021-06-22 | 交通运输部天津水运工程科学研究所 | Ship tail gas laser remote measuring system and method for high and low water levels of inland river ship lock |
| CN113176228A (en) * | 2021-03-25 | 2021-07-27 | 西安理工大学 | SO based on Internet of things2Concentration passive remote sensing monitor and monitoring method |
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