CN102426399A - Highway crosswind warning method - Google Patents
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Abstract
The invention provides a highway crosswind warning method. There is a highway installed with weather monitoring equipment with a maximum density, a largest quantity and complete functions. A monitoring station can collect meteorological elements, such as visibility, a road-surface temperature, an air temperature, a humidity, an air pressure, a wind direction, a wind speed, rainfall and the like. In the invention, observation data of Shanghai-Nanjing expressway AWM is used and according to service necessities, an average wind speed, the largest wind speed, a wind direction frequency and a frequency rose diagram of the 26 weather stations in a specified period. And according to the direction of the highway where an observation station is located, a site crosswind range is calculated and a crosswind warning diagram is generated. In the 26 stations, single station display can be performed or multiple station display can be performed. An average wind state in the specified period can be displayed and wind change can be dynamically displayed in the period (a system flow is showed in graph 9). The method can be used to provide a reference index for a meteorological decision-making service, such as strong wind forecast warning and the like.
Description
Technical field
The present invention relates to a kind of highway beam wind method for early warning, belong to meteorological field.
Background technology
The transportation of current China is in the high speed development stage, along with the surge of volume of transport and the lifting of Vehicle Speed, safety guarantee in the communications and transportation is had higher requirement.Communications and transportation belongs to the extremely sensitive industry of weather environment.Thick fog, strong wind etc. are the major weather disaster that influences China Transportation Industry.The Shanghai and Nanjing highway is from the east of Shanghai, and to Nanjing, system-wide is in the southern area of Jiangsu Province of economic height development, belongs to monsoon humid region, subtropics.The middle eastern section landform of highway is the Plain, and many networks of waterways, west section are the hills, and underlying surface and low layer water in air vapour are abundant, and is annual from thick fog pilosity in the Beginning of summer Autumnal Equinox to next year, has a strong impact on the smooth and easy and traffic safety of road.The wind data processing system can show the wind direction situation of timing statistics and the development and change of beam wind, as the reference of highway beam wind, dense fog early-warning and predicting.
Shanghai and Nanjing high speed AWMS weather monitoring system wind rose is introduced
Wind rose is according to a certain area each wind direction of average statistics and the percent value of wind speed for many years, and draws by a certain percentage.Much more general represent with eight or 16 compass azimuths.360 ° of orientation on the compass are divided into 16 lattice according to per 22.5 ° of one lattice, each wind direction of gathering is in real time counted on these 16 directions.Represented wind direction on the rose diagram, be meant wind come to, promptly blow to the wind direction of measuring point from the outside.Wind rose is divided into four kinds: wind direction frequency rose diagram, wind direction frequency rose diagram, maximum wind velocity rose diagram, mean wind speed rose diagram.Wind direction frequency rose diagram is the number of times that various within a certain period of time wind directions (having counted on 16 wind directions) occur.The number of times that occurs with each wind direction is the polar coordinates radius, corresponding wind direction be polar angle at the polar coordinates described point, the point with each adjacent direction couples together with straight line then, plots a form just like the closure fold line of rose.It is exactly wind direction frequency rose diagram.Same method is the polar coordinates radius with frequency, maximum wind velocity, mean wind speed respectively, and wind direction is a polar angle, is exactly frequency, maximum wind velocity, mean wind speed rose diagram.
Wind rose is the favorable method that the long-time section of research wind speed and direction distributes.It predicts the distribution trend of following wind direction and wind velocity through the rule of a regional wind direction and wind velocity of statistics, plays a significant role in all social production departments that need consider that wind-resources distributes.Such as: important effect can both be brought into play in a lot of fields such as the building plans in the commercial production, environmental protection, wind-power electricity generation.
Find that according to current research Shanghai and Nanjing high speed dense fog incidence and development and special period wind direction, wind speed are in close relations, and have certain rules property.For dissimilar mists, wind action is also different.For radiation fog, preferably under the situation, suitable wind speed is the factor that radiation fog generates at the ground layer damp condition.Wind speed is excessive to make the sinuous flow in the atmosphere strengthen, and sinuous flow mixings bed thickness causes the surface layer cooling slow, and steam is uploaded in a large number, makes the low layer inversion break-up or away from ground.Form on a certain height, be unfavorable for the production of mist; Wind speed is too small then can not to form certain thickness mist the vapor transfer of surface air to aerial; Suitable wind speed had then both helped steam to aerial conveying, was unlikely to again to make vertical exchange strong, thereby was beneficial to the generation of mist.(2006-2009 Shanghai and Nanjing highway Dou Zhuan station data) according to statistics; The distribution that preceding 2 hours wind directions take place radiation fog is mainly the wind in the east by north; Also there is part to be west wind; Along with approaching of dense fog, the increased frequency that wind to the west occurs, wind to the west and jet of east wind occurrence number were approaching when radiation fog took place.Radiation fog take place preceding 2 hours when dense fog takes place wind speed be 0-3m/s, wind speed generally strengthens during end, ST rising air turbulence strengthened relevant when this dissipated with radiation fog.Preceding 2 hours wind directions take place advection fog mainly is east wind and west wind, and preceding 1 hour wind direction occurring is main with jet of east wind, and the west wind number of times reduces, and wind direction is just opposite when taking place, and is main with west wind, and preceding 2 hours of wind direction and generation are similar during dissipation.The generation that advection fog needs needs certain wind-force, and wind-force is too small then can't to cause advection, the excessive mist source that then dispels of wind-force.Add up 2006-2009 years 27 times advection fog processes and find, preceding 2 hours wind speed occur at advection fog and be 1-3m/s, occur having 19 mists time wind speed to reduce in preceding 1 hour, 8 times wind speed increases, and advection fog changes not quite before wind speed and the 1h when occurring.This explanation, under suitable circumfluence background and mist source condition, dense fog possibly form behind the wind speed marked change 1h, and wind-force significantly strengthened when advection fog finished.Analyze and find that it is main with jet of east wind, wind to the west that preceding 2 hours wind directions appear in frontal fog; Wind direction changes greatly when occurring taking place with mist in preceding 1 hour, and it is main occurring becoming west wind, east by north and south by east in preceding 1 hour; There is 50% frontal fog wind direction to become southwester during generation; Wind direction is main with by east and west wind again during end.The wind speed that front and back take place from frontal fog is seen; The wind speed that preceding 2 hours frontal fogs when taking place take place is all little than advection fog and radiation fog; Maintain 0-2m/s; And 12 frontal fogs are arranged from taking place preceding 1 hour when taking place, wind speed is near zero, this also be the therefore former of prefrontal air contamination build-up and when finishing wind speed increase rapidly.
The highway dense fog takes place with the wind direction variation relation is arranged, and adopts wind rose monitoring wind condition to change the reference that can be used as the dense fog forecast.
Summary of the invention
The purpose of this invention is to provide a kind of highway beam wind method for early warning, this method is the basis with expressway weather wind data, provide accurately, reliably, wind direction monitoring timely and beam wind early warning information, for expressway weather department provides early warning information accurately.
The objective of the invention is to realize through following measure:
A kind of highway beam wind method for early warning, this method may further comprise the steps:
1) reads the meteorological measuring of appointment, be saved to array X array and Y array; The X array keeps numerical information, and the Y array keeps text message;
2) judges data designated kind is promptly judged wind speed type (judgement is 2 minutes mean wind speeds, 10 minutes mean wind speeds, still instantaneous wind direction and wind velocity);
3) in X and Y array, extract corresponding data, judge the wind direction of numerical value representative; The air speed data of sorting out thereafter arrives the corresponding wind direction array of these data, obtains 16 one dimension wind speed arrays;
4) add up each wind speed array length, obtain the wind direction frequency, 16 wind direction frequencies are saved as one-dimension array;
5) according to formula: certain wind direction frequency=certain wind wind direction frequency/all wind direction frequencies accumulative total with, draw wind direction frequency, 16 wind direction frequencies save as one-dimension array;
6) travel through the wind speed array of each wind direction, use the max function to seek maximum wind velocity wherein, 16 maximum wind velocities save as one-dimension array;
7) add up the mean wind speed of each wind direction, that is: mean wind speed=wind speed accumulative total and/wind direction frequency, 16 mean wind speeds save as one-dimension array;
8) number of times that occurs with each wind direction is the polar coordinates radius, corresponding wind direction be polar angle at the polar coordinates described point, the point with each adjacent direction couples together with straight line then, plots a form just like the closure fold line of rose, wind direction frequency rose diagram; Same method is the polar coordinates radius with frequency, maximum wind velocity, mean wind speed respectively, and wind direction is a polar angle, obtains frequency, maximum wind velocity, mean wind speed rose diagram;
9) with the early warning of early warning figure mode, prewarning area identifies with designated color; Set beam wind early warning air speed value V, actual wind speed is represented with v, if v>V, greater than part be loaded in the beam wind early warning range of wind rose, represent with the early warning color c that sets.
Wherein, the beam wind scope definition is: move towards perpendicular line with highway and be axle, about each 45 °, promptly move towards 90 ° of vertical scopes with highway, the highway left and right sides is identical, adds up to totally 180 °; The beam wind scope is promptly represented with the polar angle scope on wind rose; The radius value of beam wind scope is the early warning air speed value.Zone that angular range and radius were surrounded and the stack of wind speed rose diagram confirmed with the beam wind early warning show, are beam wind early warning figure.
Wherein, said beam wind early warning air speed value defines a plurality of ranks.
Wherein, 5 ranks of said beam wind early warning air speed value definition are respectively V
1V
2V
3V
4V
5.And V
1<v
2<v
3<v
4<v
5, the early warning color of setting is c1, c2, c3, c4, c5; Be specially: wind speed is at V
1And V
2Between part, be shown as the c1 color, wind speed is at V
2And V
3Between part, be shown as the c2 color, by that analogy, greater than V
5And, be shown as the c5 color less than the part of maximum wind velocity in the wind rose.
Wherein, the angle of 16 wind directions in the said wind rose is 0 °～360 °, whenever at a distance from wind direction of 22.5 ° of marks.
The present invention has following advantage:
Highway beam wind method for early warning of the present invention, this method utilize the meteorological wind data of high-speed transit, to the strong wind early-warning and predicting, provide accurately, reliably, information such as wind direction monitoring timely, beam wind early warning, forecast, department provides reference frame for point duty.
Because object has unique stability with respect to process, make the portability of system improve.The native system specific aim is handled AWM wind direction and wind velocity observational data.System can generate interior 26 the weather station mean wind speeds of set period, maximum wind velocity, wind direction frequency, frequency rose diagram according to service needed.According to place, research station highway trend, calculate the beam wind scope again, draw beam wind early warning figure.Because the generation of highway dense fog is in close relations with meteorological elements such as wind speed, relative humidity.The weather scientist can in conjunction with the real-time monitored data of relative humidity, draw certain highway dense fog forecast conclusion with reference to wind rose.Simultaneously, system dynamically display time interval wind direction and wind velocity changes.
Help in time finding to have the meteorological synoptic process information of some key character; For strong wind early-warning and predicting, strick precaution decision-making provide evidence; As supplementary; Native system through provide accurately, reliably, wind direction monitoring timely, beam wind early warning, forecast information, department provides decision-making foundation for point duty, for society provides the traffic meteorological service information.To reducing traffic hazard, reducing economic benefit and the certain effect of comprehensive social benefit performance that traffic is protected expense, the rational deployment main line of communication, reduced the burst fire-disaster influence, improves traffic quality, operation enterprise.For prediction data basis is established in expressway weather guarantee and decision-making management.
The present invention can handle the per minute observation data that Shanghai and Nanjing high speed AWMS system obtains, and draws wind rose.This figure has wind frequency, the wind speed information in the selected period, shows the beam wind early warning information simultaneously.The monitoring of highway wind condition is replenished and improved to these information, intuitively embodies wind direction and wind velocity and change, and is beneficial to and makes strong wind, beam wind forecasting and warning.Strong wind mainly shows as the influence of driving vehicle on the high-grade highway to be increased car resistance, dust storm or blowing snow visibility variation, side direction wind is overturned etc.The vehicular sideview of for example running at high speed receives the beam wind effect, if when wind-force is strong, especially in " air port " highway section, can makes vehicle depart from traffic route and brings out traffic hazard, to the harm of high case, two case automobiles more so.The windy rocky of husky district also is the factor that influence traffic safety, is mainly reflected in that the roadbed of eroding, sand bury, quicksand is piled up, migrating dune is set out on a journey, sand and dust fill the air (sandstorm) etc.The high wind bad road side facility that blows down is fallen on the road, also can cause traffic hazard.Wind is to the influence of means of transportation, and is especially more remarkable to flexible structure such as high, big, thin, long.Highway high wind, beam wind monitoring, forecast, early warning are at the support vehicles driving safety, and protection highway facilities aspect plays an important role.
Description of drawings
Fig. 1 is the raw data sectional drawing.
Fig. 2 is an X array partial data sectional drawing.
Fig. 3 is a Y array partial data sectional drawing.
Fig. 4 is a beam wind early warning range synoptic diagram.
Fig. 5 is a highway inclination angle synoptic diagram one.
Fig. 6 is a highway inclination angle synoptic diagram two.
Fig. 7 confirms synoptic diagram for early warning range.
Fig. 8 is an early warning figure display effect.
Fig. 9 system framework figure.
Figure 10 mean wind speed rose diagram, early warning figure.
Figure 11 maximum wind velocity rose diagram, early warning figure.
Figure 12 wind direction frequency rose diagram.
Figure 13 wind direction frequency rose diagram.
Embodiment
Below in conjunction with accompanying drawing process of the present invention is done further to describe:
1. data are obtained
What below use is the observational data of Shanghai and Nanjing high speed AWM.This meteorological measuring is the Excel form, and filename adopts the form of " station number+time ".Here, read in certain website, or the data file of reading in 26 stations simultaneously and reading in which year, specify by the user.Website is selected, and system provides with drop-down tabular form, and the user selects some websites, triggers and preserves module; Time has dual mode to confirm: 1. push away before the current system time comprise 10 minutes, 30 minutes, 1 hour, 1.5 hours, 2 hours, 3 hours or 6 hours.2. confirm the statistics beginning and ending time successively from drop-down list.Time interval is accurate to " branch ".For example: zero-time " 0:00:00 on January 1st, 2009 ", termination time " 0:30:00 on January 1st, 2009 ".More than operation, system preserves the user and chooses array variable.For example: station number is 01, and the time is 2009, and file is by name: " 101-2009.xls ", the raw data sectional drawing is as shown in Figure 1.System I/O calls the xlsread function, reads in observation data, is kept at the appointment array.Specify X and Y array, the X array keeps numerical information (as shown in Figure 2), and the Y data keep text message (as shown in Figure 3).
2. data statistics:
2.1 confirm the statistics type
Reading of data time interval and type are selected by the user.Data type is divided into: 2 minutes mean wind direction wind speed, 10 minutes mean wind direction wind speed, instantaneous wind direction and wind velocity.Confirm wherein a kind of for reading in data.The specified data operation adopts the radio button user control to accomplish, and the radio button that the user clicks certain wind direction data type gets final product.
The system stores initial sum termination time is a character string, in two character strings of Y array coupling.Coupling finishes, and obtains the line number of initial sum termination time in the Y array, is mapped to the X array again, can confirm the time interval of statistics.System obtains data type, promptly obtains X array column vector position.Thus, confirm the ranks coordinate of statistics fully.
2.2 processing wind direction
System carries out statistics program: the wind speed of sorting out each wind direction is to the corresponding one-dimension array of this wind direction.Here wind direction is observed convention by the world: with north wind is 0 °, and east wind is 90 °, turns clockwise.16 corresponding 16 angles of wind direction.The wind direction of data file is accurate to 1 °, just needs to handle the record wind direction here to the statistics wind direction.For example: N=0 °, NNE=22.5 °, the record wind direction is 11 °.Be partial to 0 °, be treated to north wind here for 11 °.Other situation by that analogy.
2.3 classification wind speed
According to top method, systemic circulation traversal 16 times is discerned a wind direction at every turn.After finding the wind direction of coupling, extract the air speed data on right side, be saved in corresponding wind direction array.
2.4 statistics wind speed
Add up each wind speed array length, can obtain the wind direction frequency.16 wind direction frequencies save as one-dimension array.According to formula: certain wind direction frequency=certain wind wind direction frequency/all wind direction frequencies accumulative totals with, draw wind direction frequency.16 wind direction frequencies save as one-dimension array.Travel through the wind speed array of each wind direction, use the max function to seek maximum wind velocity wherein.16 maximum wind velocities save as one-dimension array.Add up the mean wind speed of each wind direction, that is: mean wind speed=wind speed accumulative total and/wind direction frequency.16 mean wind speeds save as one-dimension array.
3. draw and be provided with
3.1 the drawing kind is selected
The drawing kind comprises 4 kinds, wind direction frequency rose diagram, wind direction frequency rose diagram, maximum wind velocity rose diagram, mean wind speed rose diagram.Wind direction frequency rose diagram is the number of times that various within a certain period of time wind directions (having counted on 16 wind directions) occur.The number of times that occurs with each wind direction is the polar coordinates radius, corresponding wind direction be polar angle at the polar coordinates described point, lead the point of direction to couple together mutually each then with straight line, plot a form just like the closure fold line of rose.It is exactly wind direction frequency rose diagram.Same method is the polar coordinates radius with frequency, maximum wind velocity, mean wind speed respectively, and wind direction is a polar angle, is exactly frequency, maximum wind velocity, mean wind speed rose diagram.The user selects wherein a kind of drawing kind, adopts radio button user control mode to select.
3.2 the drawing pattern is selected
Comprise that wind rose is linear, line color, data point identifier, rose diagram Fill Color.Can in system scope, set as required.The user selects to adopt the drop-down list form to select the drawing pattern.On the control right side display window is arranged, can see and look into display effect, the adjustment user is provided with.Rose diagram the fill style is set to 20% transparency and shows, convenient reference coordinate numerical value with image master compares, and also convenient and beam wind early warning figure shows simultaneously, is beneficial to staff's visual and clear ground and declares figure and reference.
3.3 draw
The drawing trigger mechanism is that left button is clicked drawing area, and user so operation begins to call drawing function.System passes to drawing function with drawing kind, the drawing pattern of last preservation as parameter.The user selects different drawing kinds, and program circuit just turns to different rose diagram drafting modules.At different wind rose diagram drafting module, the polar coordinates polar angle is a fixed value, i.e. the angle of 16 wind directions.The angle of 16 wind directions is 0 °～360 °, whenever at a distance from wind direction of 22.5 ° of marks.Polar coordinates radius selected value and drawing kind are consistent.Draw wind direction frequency rose diagram, radius is a frequency; Draw the wind direction frequency rose diagram, radius is a frequency; Draw the maximum wind velocity rose diagram, radius is a maximum wind velocity; Draw the mean wind speed rose diagram, radius is a mean wind speed.
Beam wind early warning figure generates:
The beam wind scope here is defined as: move towards perpendicular line with highway and be axle, about each 45 °, promptly vertical highway trend
90°。As shown in Figure 4, the shadow region is depicted as the beam wind scope.
1. define early warning air speed value and color
If current rose diagram is wind speed rose diagram (mean wind speed rose diagram, a maximum wind velocity rose diagram), user's definable early warning air speed value can define 5 at most simultaneously.Here be made as V
1V
2V
3V
4V
5.And V
1<v
2<v
3<v
4<v
5., the early warning color of setting is c1, c2, and c3, c4, if c5 is here V>V
1, greater than part beam wind scope represent with the early warning color c1 that sets.If V>V
2, greater than part beam wind scope represent with the early warning color c2 that sets.Other situation by that analogy.User's definition is saved in setting with variable.Make things convenient for down-stream to call.
2. get and decide the highway trend
The highway trend is generally fixed value, and the trend here is meant the direction of the local highway section tangent line at place, environment weather monitoring station.If website has change, can reset trend in system.The angle of trend is no more than with highway and X axle
180 ° the angle of cut representes, i.e. the pitch angle.Default value is represented with radian, and for example: 90 ° is pi/2=1.57.
Fig. 5, Fig. 6 are two kinds of highway inclination angle synoptic diagram.
3. calculating draw data
Confirm the maximum frequency of the maximum wind velocity and the frequency rose diagram of wind speed rose diagram.With all polar coordinates radiuses of max function traversal, confirm the radius maximal value.Radius is the wind speed or the frequency of 16 wind directions.If maximum wind velocity is less than V
1, then do not show prewarning area.If maximum wind velocity or frequency are greater than V
1, less than V
2, then the one-level prewarning area is greater than V
11Zone less than V.Other situation by that analogy.
According to the highway inclination angle, system-computed highway beam wind angular range.The radius place circumference intersection point of the boundary line of angular range and beam wind early warning wind speed or frequency is as four frontier points of prewarning area.
4. draw
According to four frontier points and early warning boundary value, confirm the early warning fill area.Draw to fill and adopt 60% transparency, it can be superimposed upon on the wind rose, be convenient to distinguish and show.Fig. 7 is superimposed upon needed four edges boundary line and frontier point on the wind rose for prewarning area, and other beam wind early warning range is similar in this, and just frontier point is different with the boundary line.Figure can save as multiple form, comprises ai, bmp, eps, emf, jpg, pcx, pbm, pdf, pgm, png, ppm, pkm etc.Early warning effect after the final stack is as shown in Figure 8.
Show that setting comprises: period average wind situation, dynamically wind variation of selected period of demonstration are selected in single demonstration of standing, 26 station demonstrations, static demonstrations.26 station demonstrations are meant that single key element multi-site shows simultaneously, because screen size is limited, divide windows display.The static demonstration is meant selected period average wind situation, i.e. a data mean chart.Dynamically show, be meant to show wind direction dynamic change in time.Show that key element comprises mean wind speed rose diagram (shown in figure 10), maximum wind velocity rose diagram (shown in figure 11), wind direction frequency rose diagram (shown in figure 12), wind direction frequency rose diagram (shown in figure 13).
If select 26 stations to show, can only staticly show average wind situation in the statistical time range.If select single station to show, can select static state to show selected period average wind situation, dynamically show that selecting period wind changes dual mode.If selection dynamical fashion, picture will be set adjacent two moving time outs.Also need set animation quantity in the set period.For example, timing statistics is 2 hours, publishes picture if set 2, and then first figure shows the preceding 1 hour average wind situation of statistical time range, and second figure shows back 1 hourly average wind regime.Publish picture if set 4, then first figure shows halfhour average wind situation before the statistical time range, shows the average wind situation of statistical time range half an hour to 1 hour, is provided with by that analogy At All Other Times.
Thus, the static beam wind early warning figure of generation, or dynamic change figure can provide wind direction monitoring accurately and reliably and beam wind early-warning and predicting information, when the weather forecast business personnel makes highway dense fog, beam wind forecast, and can be with reference to these information.
Claims (5)
1. highway beam wind method for early warning, this method may further comprise the steps:
1) reads the meteorological measuring of appointment, be saved to array X array and Y array; The X array keeps numerical information, and the Y array keeps text message;
2) judges data designated kind is promptly judged the wind speed type;
3) in X and Y array, extract corresponding data, judge the wind direction of numerical value representative; The air speed data of sorting out thereafter arrives the corresponding wind direction array of these data, obtains 16 one dimension wind speed arrays;
4) add up each wind speed array length, obtain the wind direction frequency, 16 wind direction frequencies are saved as one-dimension array;
5) according to formula: certain wind direction frequency=certain wind wind direction frequency/all wind direction frequencies accumulative total with, draw wind direction frequency, 16 wind direction frequencies save as one-dimension array;
6) travel through the wind speed array of each wind direction, use the max function to seek maximum wind velocity wherein, 16 maximum wind velocities save as one-dimension array;
7) add up the mean wind speed of each wind direction, that is: mean wind speed=wind speed accumulative total and/wind direction frequency, 16 mean wind speeds save as one-dimension array;
8) number of times that occurs with each wind direction is the polar coordinates radius, corresponding wind direction be polar angle at the polar coordinates described point, the point with each adjacent direction couples together with straight line then, plots a form just like the closure fold line of rose, wind direction frequency rose diagram; Same method is the polar coordinates radius with frequency, maximum wind velocity, mean wind speed respectively, and wind direction is a polar angle, obtains frequency, maximum wind velocity, mean wind speed rose diagram;
9) with the early warning of early warning figure mode, prewarning area identifies with designated color; Set beam wind early warning air speed value V, actual wind speed is represented with v, if v>V, greater than part be loaded in the beam wind early warning range of wind rose, represent with the early warning color c that sets.
2. highway beam wind method for early warning according to claim 1, wherein, the beam wind scope definition is: move towards perpendicular line with highway and be axle, about each 45 °, promptly move towards 90 ° of vertical scopes with highway, the highway left and right sides is identical, adds up to totally 180 °; The beam wind scope is promptly represented with the polar angle scope on wind rose; The radius value of beam wind scope is the early warning air speed value; Zone that angular range and radius were surrounded and the stack of wind speed rose diagram confirmed with the beam wind early warning show, are beam wind early warning figure.
3. highway beam wind method for early warning according to claim 1, wherein, said beam wind early warning air speed value defines a plurality of ranks.
4. highway beam wind method for early warning according to claim 3, wherein, 5 ranks of said beam wind early warning air speed value definition are respectively V
1V
2V
3V
4V
5.And V
1<v
2<v
3<v
4<v
5, the early warning color of setting is c1, c2, c3, c4, c5; Be specially: wind speed is at V
1And V
2Between part, be shown as the c1 color, wind speed is at V
2And V
3Between part, be shown as the c2 color, by that analogy, greater than V
5And, be shown as the c5 color less than the part of maximum wind velocity in the wind rose.
5. highway beam wind method for early warning according to claim 1, wherein, the angle of 16 wind directions in the said wind rose is 0 °～360 °, whenever at a distance from wind direction of 22.5 ° of marks.
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| CN109584585A (en) * | 2018-12-10 | 2019-04-05 | 中南大学 | Highway based on cloud storage big wind pre-warning method in real time |
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| CN111800582A (en) * | 2020-07-31 | 2020-10-20 | 上海眼控科技股份有限公司 | Frontal surface fog detection method and device, computer equipment and readable storage medium |
| CN112051362A (en) * | 2020-09-01 | 2020-12-08 | 杭州壹丈科技有限公司 | Wind rose pre-judgment pollutant change model |
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| CN112051362A (en) * | 2020-09-01 | 2020-12-08 | 杭州壹丈科技有限公司 | Wind rose pre-judgment pollutant change model |
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| CN112305641A (en) * | 2020-10-15 | 2021-02-02 | 广州翰南工程技术有限公司 | Expressway traffic safety meteorological internet of things monitoring and early warning system |
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