An optimization method applied to large area traffic noise calculation
A traffic noise and optimization method technology, applied in computing, computer parts, instruments, etc., can solve the problems of inability to perform noise map calculation, program suspended animation, slow calculation speed, etc., to reduce program running time, improve search efficiency, time Efficiency-enhancing effect
Active Publication Date: 2019-09-20
SUN YAT SEN UNIV
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[0002] When calculating road traffic noise in a large urban area, due to the high density of urban roads, complex distribution of buildings, and more attribute information of traffic sources and buildings, the number of program calculation grids will increase greatly, and the calculation of noise attenuation becomes It is very complicated, which makes the calculation speed very slow, and the program freezes or even throws an exception and automatically jumps out of the calculation program. Especially for megacities with a total area of more than several thousand square kilometers, the calculation of the noise map cannot even be carried out. Therefore, It is necessary to optimize the algorithm for regional road traffic noise calculation
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[0024] The present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0025] like figure 1 As shown, the present invention provides an optimization method applied to the calculation of traffic noise in large areas, including three parts: automatic screening of traffic sources, intelligent grid division and fast index of calculation targets; the specific implementation process is as follows:
[0026] Step 1: As attached figure 2 As shown, for a road segment, it is judged whether the distance between the traffic source and the receiving point is greater than 500m. If the distance is greater than 500m, the acoustic energy impact of the traffic source on the receiving point will not be superimposed.
[0027] Step 2: As attached figure 2 As shown in , for the distance between the traffic source and the receiving point is less than 500m, the noise contribution of the tr...
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The invention discloses an optimization method applied to the calculation of traffic noise in large areas, which can greatly improve the efficiency of the calculation algorithm of traffic noise in large urban areas. The specific process is as follows: firstly, according to the distance between the receiving point and the sound source point, the traffic source to be calculated is automatically selected, and the traffic source far away from the receiving point is ignored; Dense computing grids are divided in places far away from traffic sources, and sparse computing grids are divided in places far away from traffic sources; finally, through the calculation target fast index method, the calculation area is automatically identified and intelligently partitioned according to road nodes and building corners, and the A total of 9 squares in and around the calculation target (traffic source and building) are used as a new calculation area, and traffic noise calculation is performed in the new area. The present invention is applied to the propagation attenuation calculation of traffic noise in a large area, and can effectively solve the problem of low time efficiency of traffic noise calculation in a large area.
Description
technical field [0001] The invention relates to the field of traffic noise calculation, and more specifically, to an optimization method applied to the calculation of traffic noise in a large area. Background technique [0002] When calculating road traffic noise in a large urban area, due to the high density of urban roads, complex distribution of buildings, and more attribute information of traffic sources and buildings, the number of program calculation grids will increase greatly, and the calculation of noise attenuation becomes It is very complicated, which makes the calculation speed very slow, and the program freezes or even throws an exception and automatically jumps out of the calculation program. Especially for megacities with a total area of more than several thousand square kilometers, the calculation of the noise map cannot even be carried out. Therefore, The calculation algorithm of regional road traffic noise needs to be optimized. Contents of the inventio...
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IPC IPC(8): G06K9/00
CPCG06F2218/02G06F2218/22
Inventor 蔡铭王海波杨炜俊
Owner SUN YAT SEN UNIV