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Road noise automatic correction method of noise map system

A noise map and road technology, applied in traffic control system, traffic control system of road vehicles, measuring ultrasonic/sonic/infrasonic, etc., can solve the problem of establishing sound level correction model and difficult to estimate the equivalent sound level prediction model experience of traditional traffic flow Coefficients and other issues to achieve the effects of correcting calculation errors, strengthening data, and improving the accuracy of sound level calculations

Active Publication Date: 2020-12-11
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, based on the existing monitoring point verification method, it is difficult to directly establish a sound level correction model from the perspective of the traditional mechanism; Experience coefficient

Method used

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  • Road noise automatic correction method of noise map system
  • Road noise automatic correction method of noise map system
  • Road noise automatic correction method of noise map system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] A monitoring point on a road in the noise map system was selected as a reference point for the test. This road was recorded as Road 1. Using the road noise correction method proposed by the present invention, the sound level and vehicle speed were corrected for the main road sound source at this point. The calculated value of the sound level at this point at a certain moment and the contribution of all road sound sources are collected from the database (as shown in Table 1). Obviously, the difference between the noise contribution of road 1 (R) and road 2 (R') is greater than 10dB. The monitoring point calibration type belongs to single monitoring point P calibration-single road sound source R. The vehicle speed correction model constructed by the present invention is introduced into the background of the noise map system, and the model is set to check the updated sound level calculation value and monitoring value of the point every hour. When the difference between the ...

Embodiment 2

[0151] Embodiment 2: choose a monitoring point on a certain road of the noise map system to test as a reference point, this road is recorded as road 3, utilize the road noise correction method that the present invention proposes, carry out sound level and vehicle speed to the main road sound source of this point fix. The calculated sound level of the monitoring point at a certain moment and the sound level contribution of all road sound sources are collected from the database (as shown in Table 2). Road 3 (R 1 ) and Road 4 (R 2 ) noise contribution is less than 10dB, it is judged that the calibration type of the monitoring point belongs to the double monitoring point P1, P2 calibration - cross road sound source R 1 , R 2 . Therefore, another main road sound source, that is, road 4, is selected as the second reference point to deploy another monitoring point, and the calculated sound level of this point at the same time and the sound level of the two road sound sources are c...

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Abstract

The invention relates to a road noise automatic correction method of a noise map system, which comprises the following steps of: S1, selecting a monitoring point, and judging a main road sound sourceand a verification type of the monitoring point by using a system database; S2, according to the verification type of the monitoring point, adopting a hybrid modeling method to construct a vehicle speed correction model of the main road sound source; and S3, realizing vehicle speed correction and sound level correction of the main road sound source through the vehicle speed correction model and asystem core calculation model. Compared with the prior art, the method has the advantages of improving the sound level calculation precision of the noise map system and the like.

Description

technical field [0001] The invention relates to the technical field of urban environmental noise control and management, in particular to a road noise automatic correction method of a noise map system. Background technique [0002] With the rapid development of urbanization, the problem of environmental noise pollution has attracted more and more public attention. Noise maps show numerically and graphically the distribution of noise pollution across urban areas. In recent years, the scale of my country's urban areas has continued to expand and the population density has continued to rise. Traditional static noise maps have been unable to meet the real-time monitoring needs of urban environmental noise. Therefore, the Shanghai Academy of Environmental Sciences has realized the real-time dynamic update of the noise map management system and the real-time monitoring of noise at monitoring points, creating the first dynamic noise map system. [0003] The road noise of the curr...

Claims

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Application Information

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IPC IPC(8): G08G1/015G08G1/065G01H17/00
CPCG01H17/00G08G1/015G08G1/065
Inventor 洪晓丹夏丹祝文英张玮晨储益萍应乐惇孙晓明王晓楠刘长卿
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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