CN106600056A - Vehicle exhaust diffusion prediction method and system based on city scale - Google Patents
Vehicle exhaust diffusion prediction method and system based on city scale Download PDFInfo
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Abstract
The invention discloses a vehicle exhaust diffusion prediction method and system based on city scale. The method comprises: a) creating a city scale map; based on a multi-line source Gaussian diffusion model and the city scale map, obtaining the city scale vehicle exhaust diffusion simulation value; based on the pneumatic roughness coefficient, creating a pneumatic roughness coefficient database; based on the pneumatic roughness coefficient database, adjusting the city scale vehicle exhaust diffusion simulation value; obtaining the city scale vehicle exhaust diffusion prediction data; and based on the city scale vehicle exhaust diffusion prediction data, drawing a city scale vehicle exhaust diffusion distribution map.
Description
Technical field
The present invention relates to environmental area, in particular it relates to a kind of vehicle exhaust City-scale DIFFUSION PREDICTION method and system.
Background technology
The waste gas of motor vehicle emission is mainly by groups such as carbon monoxide (CO), hydrocarbon (HC) and oxynitrides (NOX)
Into, they accumulate to a certain extent in atmosphere after in the presence of sunray, nitrogen compound and hydrocarbon can rise
Reaction, generates and contains nitrogen dioxide (NO2) and ozone (O3) photochemical fog, both materials are insoluble in water, are inhaled into people
Cognition is driven straight in lung, and toxic edema can be caused when concentration is big, and into blood denatured hemoglobin can be formed, and makes tissue
Anoxic, it is very harmful to health of people.In addition, oxyhydroxide can form acid rain into after air, ecological environment is endangered.With
Automobile quantity is continuously increased, countries in the world pay attention to day by day discharge of automobile exhaust fumes problem.
Currently, transportation emission is the primary source of domestic and international many urban atmospheric pollutions, and its contribution proportion will also be with clear
The popularization of the clean energy and improving constantly in place for environmental law enforcement.The development trend of countries in the world pollution administration is to all kinds of pollutions
By means such as simulation, monitorings, categorizedly furtherd investigate, the management and control measures of being proposed for property, be finally reached effectively
The purpose of improvement.People there is no method that the ratio shared by tail gas discharging pollutant is distinguished from field measurement data, only by quantity
Limited monitoring station, can not provide the enough information of urban area tail gas pollution.
Inventor has found that vehicle exhaust diffusion phenomena model can divide four classes：Gauss diffusion model, numerical model, statistics or
Empirical model and physical model, using finite line source concept and solve Gaussian non trivial solution and determine scheme, remain calculating, mould
Intend the main stream approach of the contamination that exhaust emissions is caused.Compare with face source emission with point source is solved, existing moving source pollution is expanded
Scattered Mathematical Modeling and instrument all have the restriction of use condition and the scope of application.The scope of application is little, is only applicable to both sides of the road
So-called ' minute yardstick region ' (the micro-scale region) of each 150 meters of long and narrow banded zones.Vehicle exhaust City-scale expands
Dissipate prediction and be graphically a still unsolved difficult problem, therefore, it is necessary to research and develop one kind being capable of wider prediction car tail
Gas City-scale method of diffusion and system.
The content of the invention
The present invention proposes vehicle exhaust City-scale DIFFUSION PREDICTION method and system, and methods described can be based on many line sources
Gauss diffusion model and the City-scale map, obtain City-scale vehicle exhaust diffusion simulations value, based on pneumatic coarse system
Number database adjustment City-scale vehicle exhaust diffusion simulations value, obtains City-scale vehicle exhaust DIFFUSION PREDICTION data, and then
Vehicle exhaust City-scale DIFFUSION PREDICTION is accurately realized, it is more straight by drawing City-scale vehicle exhaust diffusion profile
What the embodiment vehicle exhaust City-scale of sight spread predicts the outcome.
According to an aspect of the invention, it is proposed that a kind of vehicle exhaust City-scale DIFFUSION PREDICTION method, methods described bag
Include：A) City-scale map, is set up；B), based on many line source Gauss diffusion models and the City-scale map, city chi is obtained
Degree vehicle exhaust diffusion simulations value；C), pneumatic coefficient of roughness database is set up based on the pneumatic coefficient of roughness；D), based on pneumatic thick
Rough coefficient data storehouse adjusts the City-scale vehicle exhaust diffusion simulations value, obtains City-scale vehicle exhaust DIFFUSION PREDICTION number
According to；E), based on City-scale vehicle exhaust DIFFUSION PREDICTION data, City-scale vehicle exhaust diffusion profile is drawn.
According to another aspect of the invention, it is proposed that a kind of vehicle exhaust City-scale DIFFUSION PREDICTION system, the system
Including：Set up the unit of City-scale map；Based on many line source Gauss diffusion models and the City-scale map, city is obtained
The unit of yardstick vehicle exhaust diffusion simulations value；The unit of pneumatic coefficient of roughness database is set up based on the pneumatic coefficient of roughness；Base
The City-scale vehicle exhaust diffusion simulations value is adjusted in pneumatic coefficient of roughness database, City-scale vehicle exhaust is obtained and is expanded
The unit of scattered prediction data；Based on City-scale vehicle exhaust DIFFUSION PREDICTION data, City-scale vehicle exhaust city chi is drawn
The unit of degree diffusion profile.
It is an advantage of the current invention that：
(1) present invention can obtain City-scale vapour based on many line source Gauss diffusion models and the City-scale map
Tail gas diffusion simulations value.
(2) present invention is obtained by adjusting City-scale vehicle exhaust diffusion simulations value based on pneumatic coefficient of roughness database
City-scale vehicle exhaust DIFFUSION PREDICTION data are taken, and then accurately realizes vehicle exhaust City-scale DIFFUSION PREDICTION.
(3) present invention more intuitively embodies vehicle exhaust city by drawing City-scale vehicle exhaust diffusion profile
What yardstick spread predicts the outcome.
The device of the present invention has other characteristics and advantage, these characteristics and advantage from the accompanying drawing being incorporated herein and with
Will be apparent in specific embodiment afterwards, or by the accompanying drawing being incorporated herein and subsequent specific embodiment
In stated in detail, these the drawings and specific embodiments be provided commonly for explain the present invention certain principles.
Description of the drawings
Exemplary embodiment of the invention is described in more detail by combining accompanying drawing, the present invention it is above-mentioned and its
Its purpose, feature and advantage will be apparent from, wherein, in exemplary embodiment of the invention, identical reference number
Typically represent same parts.
The flow chart of the step of Fig. 1 shows vehicle exhaust City-scale DIFFUSION PREDICTION method of the invention.
Fig. 2 a-b show the schematic diagram of City-scale map of the invention.
Fig. 3 a-b show the schematic diagram of City-scale grating map of the invention.
Fig. 4 a-d show City-scale two dimension vehicle exhaust distribution of concentration figure of the invention.
Fig. 5 a-c show City-scale three-dimensional vehicle exhaust distribution of concentration figure of the invention.
Specific embodiment
The present invention is more fully described below with reference to accompanying drawings.Although showing the side of being preferable to carry out of the present invention in accompanying drawing
Formula, however, it is to be appreciated that may be realized in various forms the present invention and should not be limited by embodiments set forth herein.Phase
Instead, there is provided these embodiments be in order that the present invention is more thorough and complete, and can be by the scope of the present invention intactly
Convey to those skilled in the art.
Embodiment 1
The flow chart of the step of Fig. 1 shows vehicle exhaust City-scale DIFFUSION PREDICTION method of the invention.Fig. 2 a-
B shows the schematic diagram of City-scale map of the invention.Fig. 3 a-b show City-scale grid of the invention
The schematic diagram of map.Fig. 4 a-d show City-scale two dimension vehicle exhaust distribution of concentration figure of the invention.Fig. 5 a-c
Show City-scale three-dimensional vehicle exhaust distribution of concentration figure of the invention.In this embodiment, according to the present invention
Vehicle exhaust City-scale DIFFUSION PREDICTION method can include：A) City-scale map, is set up；B), based on many line source Gausses
Diffusion model and the City-scale map, obtain City-scale vehicle exhaust diffusion simulations value；C), based on the pneumatic coefficient of roughness
Set up pneumatic coefficient of roughness database；D), the City-scale vehicle exhaust diffusion is adjusted based on pneumatic coefficient of roughness database
The analogue value, obtains City-scale vehicle exhaust DIFFUSION PREDICTION data；E), based on City-scale vehicle exhaust DIFFUSION PREDICTION data,
Draw City-scale vehicle exhaust diffusion profile.
The embodiment obtains City-scale car tail based on many line source Gauss diffusion models and the City-scale map
Gas diffusion simulations value, based on the pneumatic coefficient of roughness database City-scale vehicle exhaust diffusion simulations value is adjusted, and obtains city chi
Degree vehicle exhaust DIFFUSION PREDICTION data, and then vehicle exhaust City-scale DIFFUSION PREDICTION is accurately realized, by drawing city
Yardstick vehicle exhaust diffusion profile more intuitively embodies predicting the outcome for vehicle exhaust City-scale diffusion.
The following detailed description of the concrete steps of vehicle exhaust City-scale DIFFUSION PREDICTION method of the invention.
In one example, setting up City-scale map includes：Set up City-scale map.
In one example, all standing present situation land used vector graphics in city is obtained according to actual mapping and satellite remote sensing map
And related geography spatial data；The related geographical spatial data is carried out screening and obtains the arrow simplified with after process
Amount data file, according to the city all standing present situation land used vector image, by vector data multi-section-line form is switched to；According to institute
State the data of multi-section-line form, with vector data extract road network, water system, building profile, building storey, land used profile,
Land used attribute these basic datas, and set up new figure layer；Stored simplifying with the vector data file after process, constituted number
The map data information of word map, sets up City-scale map.
In one example, based on many line source Gauss diffusion models and the City-scale map, City-scale vapour is obtained
Tail gas diffusion simulations value.
In one example, obtaining City-scale vehicle exhaust diffusion simulations value includes：Automobile is obtained based on field data
The continuous line source that emission is formed during traveling, dredges secret degree and the continuous line source obtains continuous-stable concentration field based on automobile
Line source, City-scale vehicle exhaust diffusion simulations value is obtained based on line source and many line source Gauss diffusion models.
In one example, pneumatic coefficient of roughness database is set up based on the pneumatic coefficient of roughness.
Specifically, pneumatic coefficient of roughness database is set up, is with data according to the pneumatic coefficient of roughness of a large amount of urban areas
Form Excel forms are stored, and are stored according to data relationship and are managed, the number that multiple users can be to store in shared data bank
According to, different user can also according to different demands to access database in data, pneumatic coefficient of roughness database is one
Individual or multiple files, what is stored in file is the data Jing after computer process.Including system and personnel, user, database, meter
Calculation machine software and hardware, database application system and data base management system.
In one example, the City-scale vehicle exhaust diffusion simulations are adjusted based on pneumatic coefficient of roughness database
Value, obtains City-scale vehicle exhaust DIFFUSION PREDICTION data.
Specifically, many line source Gaussian methods are turbulent fluctuation frequencies that is real fluid is complicated and changeable and being difficult to quantitatively determine
Spectrum, is reduced to be easy to the normal distribution of Mathematical treatment, it is to avoid simultaneous solution second order partial differential is controlled substantially in complicated calculations domain
The non-linear difficulty of equation group, the greatly simplified Gaussian equation (algebraic equation) of a demand solution is simple and practical.Its master
Want defect be still can not consider urban area earth's surface particularity (i.e. the polytropy of city complicated earth surface, including greenery patches, the woods,
The characteristic that square, apartment, community, high-lager building etc. are interspersed) to tail gas diffusion and the impact for transporting, i.e., can only use one
The Z0 (the pneumatic coefficient of roughness) of individual constant value, it is impossible to consider the impact that city complex landform is transported to contamination.It is pneumatic coarse
Coefficient data storehouse can give many line source gause's rules offer pneumatic coefficient of roughness in all directions as parameters of formula, be more defined
True vehicle exhaust diffusion data.
In one example, calculate the pneumatic coefficient of roughness based on the pneumatic coefficient of roughness database to spread tail gas
Affecting parameters, adjust the City-scale vehicle exhaust diffusion simulations value based on the affecting parameters, obtain City-scale vapour
Tail gas DIFFUSION PREDICTION data.
In one example, based on City-scale vehicle exhaust DIFFUSION PREDICTION data, draw City-scale vehicle exhaust and expand
Scattered distribution map.
Specifically, many line source Gaussian rules of pneumatic coefficient of roughness database combination set up according to the pneumatic coefficient of roughness
Vehicle exhaust DIFFUSION PREDICTION data can be obtained, City-scale tail is drawn with reference to City-scale map and graph visualization technology
Gas diffusion profile.
The core for drawing City-scale vehicle exhaust diffusion profile is graph visualization technology, by using modeling and wash with watercolours
The method of dye, data the geometric graphic element of object is mapped to, and ultimately generates realistic figure, and visualization hardware is mainly
Graphics workstation and super Visual calculation machine, wherein graphics workstation have abundant graphics processing function and flexible window
Management function, can configure jumbo internal memory and hard disk, with good human-computer interaction interface, input/output and perfect in shape and function,
Visual software is generally divided into three levels, respectively operating system, visual software instrument and visualizing application software.Utilize
Graph visualization technology, can pass through the advanced Visual calculation resource of network access, realize the quick-searching to resource, utilize
These information can realize video tour, video recording, storage, backup and other management application functions that universe is networked.
In one example, the drafting vehicle exhaust City-scale diffusion profile includes：Based on the City-scale
Vehicle exhaust DIFFUSION PREDICTION data and graph visualization technology, draw City-scale two, three-dimensional vehicle exhaust distribution of concentration figure,
The City-scale two, three-dimensional vehicle exhaust distribution of concentration figure are City-scale vehicle exhaust diffusion profile.
Embodiment 2
According to the embodiment of the present invention, there is provided a kind of vehicle exhaust City-scale DIFFUSION PREDICTION system, the system
Including：Set up the unit of City-scale map；Based on many line source Gauss diffusion models and the City-scale map, city is obtained
The unit of yardstick vehicle exhaust diffusion simulations value；The unit of pneumatic coefficient of roughness database is set up based on the pneumatic coefficient of roughness；Base
The City-scale vehicle exhaust diffusion simulations value is adjusted in pneumatic coefficient of roughness database, City-scale vehicle exhaust is obtained and is expanded
The unit of scattered prediction data；Based on City-scale vehicle exhaust DIFFUSION PREDICTION data, City-scale vehicle exhaust city chi is drawn
The unit of degree diffusion profile.
The embodiment adjusts the City-scale vehicle exhaust diffusion simulations value based on pneumatic coefficient of roughness database, from
And the information that vehicle exhaust City-scale spreads more accurately is predicted, spread based on City-scale vehicle exhaust City-scale is drawn
Distribution map more intuitively embodies vehicle exhaust City-scale DIFFUSION PREDICTION result.
In one example, the City-scale map of setting up includes：City-scale grating map is obtained by database
And the coordinate at control point, Geometry rectification and numeral are carried out by the coordinate to the City-scale grating map and the control point
Change to process and obtain City-scale map.
In one example, the acquisition City-scale vehicle exhaust diffusion simulations value includes：Obtained based on field data
The continuous line source that emission is formed during running car, dredges secret degree and the continuous line source acquisition continuous-stable is dense based on automobile
The line source of degree field, based on line source and many line source Gauss diffusion models City-scale vehicle exhaust diffusion simulations value is obtained.
In one example, the acquisition City-scale vehicle exhaust DIFFUSION PREDICTION data include：Based on described pneumatic thick
Rough coefficient data storehouse calculates the affecting parameters that the pneumatic coefficient of roughness spreads to tail gas, adjusts described based on the affecting parameters
City-scale vehicle exhaust diffusion simulations value, obtains City-scale vehicle exhaust DIFFUSION PREDICTION data.
In one example, the drafting vehicle exhaust City-scale diffusion profile includes：Based on the City-scale
Vehicle exhaust DIFFUSION PREDICTION data and graph visualization technology, draw City-scale two, three-dimensional vehicle exhaust distribution of concentration figure,
The City-scale two, three-dimensional vehicle exhaust distribution of concentration figure are City-scale vehicle exhaust City-scale diffusion profile.
It will be understood by those skilled in the art that the purpose of the description to embodiments of the present invention above is only for exemplarily
The beneficial effect of embodiments of the present invention is illustrated, is not intended to for embodiments of the present invention to be limited to given any show
Example.
It is described above the embodiments of the present invention, described above is exemplary, and non-exclusive, and
It is also not necessarily limited to disclosed each embodiment.It is right in the case of the scope and spirit without departing from illustrated each embodiment
Many modifications and changes will be apparent from for those skilled in the art.The choosing of term used herein
Select, it is intended to best explain principle, practical application or the improvement to the technology in market of each embodiment, or make this technology
Other those of ordinary skill in field are understood that each embodiment disclosed herein.
Claims (10)
1. a kind of vehicle exhaust City-scale DIFFUSION PREDICTION method, methods described includes：
A) City-scale map, is set up；
B), based on many line source Gauss diffusion models and the City-scale map, City-scale vehicle exhaust diffusion simulations are obtained
Value；
C), pneumatic coefficient of roughness database is set up based on the pneumatic coefficient of roughness；
D), the City-scale vehicle exhaust diffusion simulations value is adjusted based on pneumatic coefficient of roughness database, obtains City-scale
Vehicle exhaust DIFFUSION PREDICTION data；
E), based on City-scale vehicle exhaust DIFFUSION PREDICTION data, City-scale vehicle exhaust diffusion profile is drawn.
2. vehicle exhaust City-scale DIFFUSION PREDICTION method according to claim 1, wherein, it is described to set up City-scale ground
Figure includes：City all standing present situation land used vector graphics and related geographical space are obtained according to actual mapping and satellite remote sensing map
Coordinate data；The related geographical spatial data is carried out screening and obtains the vector data file simplified with after process, root
According to the city all standing present situation land used vector image, vector data is switched to into multi-section-line form；According to the multi-section-line form
Data, with vector data extract road network, water system, building profile, building storey, land used profile, land used attribute these
Basic data, and set up new figure layer；Stored simplifying with the vector data file after process, constituted the map of numerical map
Data message, sets up City-scale map.
3. vehicle exhaust City-scale DIFFUSION PREDICTION method according to claim 2, wherein, the acquisition City-scale vapour
Tail gas diffusion simulations value includes：The continuous line source that emission is formed when obtaining running car based on field data, based on vapour
Car dredges secret degree and the continuous line source obtains the line source of continuous-stable concentration field, based on line source and many line source Gauss diffusion models
Obtain City-scale vehicle exhaust diffusion simulations value.
4. vehicle exhaust City-scale DIFFUSION PREDICTION method according to claim 1, wherein, the acquisition City-scale vapour
Tail gas DIFFUSION PREDICTION data include：The pneumatic coefficient of roughness is calculated based on the pneumatic coefficient of roughness database to expand tail gas
Scattered affecting parameters, based on the affecting parameters City-scale vehicle exhaust diffusion simulations value is adjusted, and obtains City-scale
Vehicle exhaust DIFFUSION PREDICTION data.
5. vehicle exhaust City-scale DIFFUSION PREDICTION method according to claim 1, wherein, the drafting vehicle exhaust city
City's yardstick diffusion profile includes：Based on the City-scale vehicle exhaust DIFFUSION PREDICTION data and graph visualization technology, paint
City-scale processed two, three-dimensional vehicle exhaust distribution of concentration figure, the City-scale two, three-dimensional vehicle exhaust distribution of concentration figure
For City-scale vehicle exhaust diffusion profile.
6. a kind of vehicle exhaust City-scale DIFFUSION PREDICTION system, the system includes：
Set up the unit of City-scale map；
Based on many line source Gauss diffusion models and the City-scale map, City-scale vehicle exhaust diffusion simulations value is obtained
Unit；
The unit of pneumatic coefficient of roughness database is set up based on the pneumatic coefficient of roughness；
The City-scale vehicle exhaust diffusion simulations value is adjusted based on pneumatic coefficient of roughness database, City-scale automobile is obtained
The unit of tail gas DIFFUSION PREDICTION data；
Based on City-scale vehicle exhaust DIFFUSION PREDICTION data, City-scale vehicle exhaust City-scale diffusion profile is drawn
Unit.
7. vehicle exhaust City-scale DIFFUSION PREDICTION system according to claim 1, wherein, it is described to set up City-scale ground
Figure includes：The coordinate at City-scale grating map and control point is obtained by database, by City-scale grid ground
The coordinate at figure and the control point carries out Geometry rectification and digitized processing obtains City-scale map.
8. vehicle exhaust City-scale DIFFUSION PREDICTION system according to claim 2, wherein, the acquisition City-scale vapour
Tail gas diffusion simulations value includes：The continuous line source that emission is formed when obtaining running car based on field data, based on vapour
Car dredges secret degree and the continuous line source obtains the line source of continuous-stable concentration field, based on line source and many line source Gauss diffusion models
Obtain City-scale vehicle exhaust diffusion simulations value.
9. vehicle exhaust City-scale DIFFUSION PREDICTION system according to claim 1, wherein, the acquisition City-scale vapour
Tail gas DIFFUSION PREDICTION data include：The pneumatic coefficient of roughness is calculated based on the pneumatic coefficient of roughness database to expand tail gas
Scattered affecting parameters, based on the affecting parameters City-scale vehicle exhaust diffusion simulations value is adjusted, and obtains City-scale
Vehicle exhaust DIFFUSION PREDICTION data.
10. vehicle exhaust City-scale DIFFUSION PREDICTION system according to claim 1, wherein, the drafting vehicle exhaust
City-scale diffusion profile includes：Based on the City-scale vehicle exhaust DIFFUSION PREDICTION data and graph visualization technology,
Draw City-scale two, three-dimensional vehicle exhaust distribution of concentration figure, the City-scale two, three-dimensional vehicle exhaust distribution of concentration
Figure is City-scale vehicle exhaust City-scale diffusion profile.
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