CN106202506A - Three-dimensional traffic Noise map update method in conjunction with offline storage Yu instant computing - Google Patents
Three-dimensional traffic Noise map update method in conjunction with offline storage Yu instant computing Download PDFInfo
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Abstract
The present invention proposes the three-dimensional traffic Noise map update method of a kind of combination offline storage and instant computing, and the calculating of noise is divided into the noise emission item relevant to traffic flow and noise attentuation item two parts unrelated with traffic flow；Only relevant to geographic element noise attentuation item is calculated and by its offline storage in advance in data base, when three-dimensional traffic Noise map needs to be updated, change according to urban road traffic flow modes, only calculate the noise emission item of change, noise attentuation item in conjunction with offline storage is calculated final noise figure, reduces amount of calculation.For accelerating the renewal speed of three-dimensional traffic Noise map, this method uses the mode of computer cluster parallel computation to be accelerated noise calculation and the renewal of Noise map.The features such as it is good that the distributed computing system that this method is used in combination has load equilibrium, and motility is high and autgmentability is strong, coordinate the Noise map update algorithm after optimizing can greatly reduce the calculating time, are obviously improved renewal efficiency.
Description
Technical field
The present invention relates to road traffic three-dimensional noise and calculate renewal and computer cluster distributed computing technology field, more
In particular it relates to a kind of combination offline storage and the three-dimensional traffic Noise map Rapid Updating of instant computing.
Technical background
Three-dimensional traffic Noise map is possible not only to show the distribution situation of traffic noise on ground, simultaneously can also be to towering
The noise profile situation of numerous building surfaces on the ground is shown.In view of the noise source affecting people's daily life
Mainly road traffic noise, and the state of road traffic is to have regular hour characteristic.Therefore, according to road traffic shape
Noise map is quickly updated by state, and applies three-dimensional traffic Noise map to open up the noise profile situation of survey region
Show, analyze and assess, the spatial and temporal distributions of the road traffic noise of research specific region is had important effect.
Research and application that current three-dimensional traffic Noise map quickly updates are substantially by using supercomputer parallel
Calculate or Distributed Calculation is to reduce the time that big noise region calculates.Such as Noise map business software SoundPlan, Cadna/
A, Lima etc. provide the function of Distributed Calculation: multinode disposes software for calculation, subtask distribution, each node subtask meter
Calculate, subtask result collects and shows.But these business softwares also exist, and deployment is complicated, system flexibility is poor, calculate task management
The shortcoming such as dumb, cannot play the computing capability of each computer node during Distributed Calculation completely.
As can be seen here, the renewal of the three-dimensional traffic Noise map in the biggest region still suffers from updating computationally intensive, consumption
Take the problems such as calculating resource is many.
Summary of the invention
It is an object of the invention to the existing issue overcoming the three-dimensional traffic Noise map in big region quickly to update, it is provided that one
Planting and have ease-to-operate, the combination offline storage of the extensibility of load equilibrium and height is handed over the three-dimensional of instant computing
Logical Noise map Rapid Updating.
In order to realize above-mentioned goal of the invention, the technical solution used in the present invention is as follows:
A kind of combination offline storage and the three-dimensional traffic Noise map Rapid Updating of instant computing, including following step
Rapid:
A. the calculating of noise is divided into calculating noise emission item and two parts of noise attentuation item.The calculating of noise emission item
Only relevant to the traffic flow modes of urban road, noise attentuation item geography only and between traffic noise sound source and noise Rx point
Factor is correlated with；
Further, the bicycle noise emission of large, medium and small three kinds of different automobile types is considered among noise emission item；Noise declines
Deduction item includes under the noise range attenuation under three dimensions, the buildings noise attentuation under three dimensions and three dimensions
Sound barrier noise attentuation；
B. computer cluster Distributed Calculation noise is utilized to decline item.The distributed computing system that method uses is based on tile ground
Noise calculation region is cut into tiling area, using tiling area as computing unit, and distributed by figure service (TMS) thought
Use the method calculating node active request task to replace traditional method passively received an assignment during calculating, make task divide
Join and there is harmony, and by noise attentuation item offline storage to data base.
Further, method uses region segmentation mechanism to split basic data with tiling area for unit, and point
Do not store.18th level of the size correspondence tile map service standard of every map tile, and by each noise Rx point
Noise Rx radius is set to 500m.
Further, during Distributed Calculation, each calculating node uses Data cache technology, reduce redundancy
Data transmission in a network.
C. calculate noise emission item, and combine noise attentuation item and be calculated the noise figure of noise Rx point.Because of traffic
The change of stream and when carrying out the renewal of Noise map, noise emission item the most again, and combine offline storage by energy supposition method
Noise attentuation item be calculated new noise profile result, update three-dimensional traffic Noise map with this.
Compared with prior art, the invention have the advantages that
The present invention proposes the three-dimensional traffic Noise map Rapid Updating of a kind of combination offline storage and instant computing.
The method is by combining instant computing with offline storage noise attentuation item, it is possible to be used in combination distributed computing system etc.
The three-dimensional traffic Noise map in big region is quickly updated by means.The Noise map update algorithm that method is used is counted in advance
Calculate each noise attentuation item received between point and noise source, and by its offline storage in data base.Additionally, the method is also
The calculating speed of noise can be further speeded up in conjunction with distributed computing system.This distributed computing system uses tile map clothes
Noise calculation region is cut into tiling area, using tiling area as computing unit, and in Distributed Calculation by business (TMS) thought
During use the method calculating node active request task to replace the traditional method passively received an assignment, have easy and simple to handle
Property, load equilibrium and the extensibility of height.This Rapid Updating can be applied not only to have mainframe computer collection
In the middle of the laboratory of group or supercomputer, it is also possible to be applied to common individual's electricity of the most several phase the Internets
On brain, by the method using instant computing and offline storage to combine, while significantly speeding up noise renewal, have very
Strong adaptability and autgmentability.
The present invention is the three-dimensional traffic Noise map Rapid Updating of a kind of combination offline storage and instant computing, solves
The renewal that the urban road three-dimensional traffic Noise map in big region faces when updating is computationally intensive, expends that to calculate resource many etc.
Problem.
Accompanying drawing explanation
Fig. 1 is method overall structure schematic diagram in the present invention.
Fig. 2 is world map map tile numbering result schematic diagram when level is 2 in the present invention.
Fig. 3 is that in the present invention, regional road traffic noise profile formula calculates design flow diagram.
Detailed description of the invention
Accompanying drawing being merely cited for property explanation, it is impossible to be interpreted as the restriction to this patent；In order to the present embodiment is more preferably described, attached
Scheme some parts to have omission, zoom in or out, do not represent the size of actual product；
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is to be appreciated that
's.
As it is shown in figure 1, the three-dimensional traffic Noise map of the combination offline storage of present invention proposition and instant computing is the most more
New method, mainly contains 3 modules: data acquisition process module, noise profile formula computing module and Noise map update
Module.Whole Noise map calculates and more new technological process is as follows:
Step 1: data acquisition process module, by GIS platform, uses Arcgis Engine API coding, from GIS
Data base reads urban geography element information.
Step 2: utilize the gps data of Floating Car in city, in conjunction with by Green's primary speed-density logarithmic relationship model
The Speed-flow Relationship model derived is to obtain the vehicle flowrate data of each road section in city.
Step 3: use region segmentation mechanism for unit, basic data to be split with tiling area, tile is compiled
Number, and set up latitude and longitude coordinates to the corresponding relation between tile number.Such as, tile number coordinate origin is scheduled on the world
The upper left corner of map, numbering X-axis overlap with north latitude 85.05 ° and direction to the left, Y-axis and east longitude 180 ° (also be 180 ° of west longitude) are heavily
Close and direction is downward.In conjunction with Mercator projection formula, the latitude and longitude coordinates of its correspondenceTo tile number (Xtile,
Ytile) conversion formula is as follows:
Wherein, n=2level, level is tile level；λ andIt is respectively longitude and latitude (unit radian).Work as level
When=2, numbering X-direction and Y-direction are respectively arranged with tile quantity n=4, and total tile data is 16, and its numbering result is as shown in Figure 2.Will
Various geographic elements store in corresponding tile, and are stored in data storage server by all of tile data.
Step 4: use Distributed Computing Platform to carry out the attenuation term of noise calculating and offline storage: to use multiple calculating
Node, and on each calculating node, run distributed-computation program client so that it is participate in the middle of Distributed Calculation, such as figure
Shown in 3.Wherein, the process of the participation Distributed Calculation of each calculating node is as follows:
(1) before calculating starts, calculate and control server according to zoning scope and level formation zone, tiling area
The tile number set inside comprised, is formed and calculates task list, the corresponding tile number of each task；
(2) when calculating node A participation and entering calculating, its active calculates task from calculating control server request；
(3) calculate control server from be not fully complete task list choose a tile number T and distribute to calculate node
A；
(4) calculate the tile number T that node A arrives according to request, from data server requests, the noise in this tile is connect
All tile datas (including this tile itself) in the influential regional extent of sink；
(5) after receiving all relevant basic datas, the node A setting according to reception point generating mode is calculated, raw
Become the noise Rx point in region corresponding to tile number T, and calculate each noise figure receiving point；
(6) after completing to calculate, noise calculation result being returned to data server, data server is equally with tiling area
The noise result of this tile is stored for unit；
(7) after confirming that result of calculation returns successfully, send message informing and calculate control server by tile number T never
Complete task list is rejected；
Now, calculate node A be in can duty, jump to second step, control the new tile of server request from calculating
Number and circulate said process, until calculating the task of controlling not to be not fully complete in server.
Step 5: calculate noise emission item, and combine noise attentuation item and be calculated the noise figure of noise Rx point.Below
The flow process quickly updated for Noise map:
(1) when regional road traffic stream changes and needs to update noise result, every road section is calculated it and hands over
Through-flow item；
(2) for a certain noise Rx point, its section tag set stored is utilized to index road influential on it
Final noise figure, to obtain corresponding traffic flow item, in conjunction with the fixterm of offline storage, is tried to achieve in section, updates three-dimensional friendship with this
Logical Noise map.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right
The restriction of embodiments of the present invention.For those of ordinary skill in the field, the most also may be used
To make other changes in different forms.Here without also cannot all of embodiment be given exhaustive.All at this
Any amendment, equivalent and the improvement etc. made within the spirit of invention and principle, should be included in the claims in the present invention
Protection domain within.
Claims (8)
1. the three-dimensional traffic Noise map update method combining offline storage and instant computing, it is characterised in that described side
Method comprises the following steps:
A, the calculating of noise is divided into calculating noise emission item and two parts of noise attentuation item；
B, computer cluster distributed speed-up computation noise is utilized to decline item, and by noise attentuation item offline storage to data base；
C, calculate noise emission item, and the noise attentuation item combining offline storage is calculated the noise figure of noise Rx point, with
This updates three-dimensional traffic Noise map.
Three-dimensional traffic Noise map update method the most according to claim 1, it is characterised in that: in described step a, noise
Discharge item calculating only relevant to the traffic flow modes of urban road, noise attentuation item only with traffic noise sound source and noise Rx
Geographic factor between point is correlated with, and the calculating of noise emission item and noise attentuation item is non-interference.
Three-dimensional traffic Noise map update method the most according to claim 2, it is characterised in that: examine among noise emission item
Consider the bicycle noise emission of large, medium and small three kinds of different automobile types.
Three-dimensional traffic Noise map update method the most according to claim 2, it is characterised in that: noise attentuation item includes three
Sound barrier noise under noise range attenuation under dimension space, the buildings noise attentuation under three dimensions and three dimensions
Decay.
Three-dimensional traffic Noise map update method the most according to claim 1, it is characterised in that: in described step b, utilize
Computer cluster distributed speed-up computation noise declines item, is that the distributed computing system used is based on tile map service (TMS)
Noise calculation region is cut into tiling area by thought, using tiling area as computing unit, and during Distributed Calculation
Use the method calculating node active request task, make task distribution have harmony.
Three-dimensional traffic Noise map update method the most according to claim 5, it is characterised in that: use region segmentation mechanism
For unit, basic data is split with tiling area, and store respectively, the size correspondence tile map of every map tile
18th level of service standard, and the noise Rx radius of each noise Rx point is set to 500m.
Three-dimensional traffic Noise map update method the most according to claim 5, it is characterised in that: in Distributed Calculation process
In, each calculating node uses Data cache technology, reduces redundant data transmission in a network.
Three-dimensional traffic Noise map update method the most according to claim 1, it is characterised in that: in described step c, because of
The change of traffic flow and when carrying out the renewal of Noise map, noise emission item the most again, and combine off-line by energy supposition method
The noise attentuation item of storage is calculated new noise profile result, updates three-dimensional traffic Noise map with this.
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| CN106611438B (en) * | 2016-12-27 | 2019-12-24 | 广州都市圈网络科技有限公司 | Local area updating and map cutting method and device of three-dimensional simulation map |
| CN106611438A (en) * | 2016-12-27 | 2017-05-03 | 广州都市圈网络科技有限公司 | Method and device for updating and slicing local area of three-dimensional simulation map |
| CN106960097A (en) * | 2017-03-27 | 2017-07-18 | 北京图安世纪科技股份有限公司 | One kind builds three-dimensional city level road network and microscopic traffic flow simulation method and system |
| CN106960097B (en) * | 2017-03-27 | 2020-06-16 | 北京图安世纪科技股份有限公司 | Simulation method and system for constructing three-dimensional urban road network and microcosmic traffic flow |
| CN108334726A (en) * | 2017-08-17 | 2018-07-27 | 中山大学 | A kind of urban area road noise distribution forecasting method |
| CN107564098A (en) * | 2017-08-17 | 2018-01-09 | 中山大学 | A kind of Fast rendering method of big Local Area Network three-dimensional noise map |
| CN111492323A (en) * | 2017-12-20 | 2020-08-04 | Wing航空有限责任公司 | Mitigating noise exposure of unmanned aerial vehicles |
| CN111492323B (en) * | 2017-12-20 | 2023-08-01 | Wing航空有限责任公司 | Mitigating noise exposure of unmanned aerial vehicles |
| CN108801449A (en) * | 2018-07-09 | 2018-11-13 | 滨州职业学院 | A kind of urban traffic noise inquiry system of wireless monitor |
| CN109063288A (en) * | 2018-07-19 | 2018-12-21 | 中山大学 | A kind of city area-traffic noise profile parallel calculating method |
| CN112463898A (en) * | 2020-10-21 | 2021-03-09 | 中山大学 | Noise map updating method combining speed and noise monitoring data |
| CN112287062A (en) * | 2020-12-23 | 2021-01-29 | 智道网联科技(北京)有限公司 | Real-time traffic information synchronization method and device and electronic equipment |
| CN112287062B (en) * | 2020-12-23 | 2021-04-02 | 智道网联科技(北京)有限公司 | Real-time traffic information synchronization method and device and electronic equipment |
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