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A road noise automatic correction method for noise map system

A noise map and road technology, applied in traffic control systems, traffic control systems of road vehicles, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problem of difficulty in estimating the empirical coefficients of traditional equivalent sound level prediction models for traffic flow, and establish sound level corrections. Model and other issues to achieve the effect of strengthening data and improving the accuracy of sound level calculation

Active Publication Date: 2021-08-17
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A road noise automatic correction method for noise map system
  • A road noise automatic correction method for noise map system
  • A road noise automatic correction method for noise map system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] A monitoring point on a road in the noise map system is selected as a reference point for testing, and the road is marked as road 1. The road noise correction method proposed by the present invention is used to correct the sound level and vehicle speed of the main road sound source at this point. Collect the calculated value of sound level at a certain moment and the contribution of all road sound sources 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 verification type belongs to the single monitoring point P verification - a 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 this point every hour. When the difference between the two is greater than...

Embodiment 2

[0151] Example 2: Select a monitoring point on a road of the noise map system as a reference point for testing, and this road is marked as road 3. Using the road noise correction method proposed by the present invention, the sound level and vehicle speed of the main road sound source at this point are calculated. Correction. Collect the calculated sound level value of the monitoring point at a certain moment from the database and the sound level contribution of all road sound sources (as shown in Table 2), road 3 (R 1 ) and road 4 (R 2 ), the noise contribution difference is less than 10dB, and the verification type of the monitoring point is judged to belong to the double monitoring point P1, P2 verification - cross road sound source R 1 , R 2 . Therefore, a second reference point is selected in another main road sound source, namely road 4, to deploy another monitoring point, and collect the sound level calculation value of this point at the same time and the sound level ...

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Abstract

The invention relates to a road noise automatic correction method for a noise map system, comprising the following steps: S1: select a monitoring point, and use the system database to judge the main road sound source and verification type of the monitoring point; S2: according to the calibration of the monitoring point According to the experimental type, the vehicle speed correction model of the main road sound source is constructed by using a hybrid modeling method; S3: Combining the vehicle speed correction model and the system core calculation model, the vehicle speed correction and sound level correction of the main road sound source are realized. Compared with the existing technology , the invention has the advantages of improving the calculation accuracy of the sound level 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. The Noise Map displays numerically and graphically the distribution of noise pollution within an urban area. In recent years, the scale of urban areas in my country has continued to expand and the population density has continued to rise. Traditional static noise maps have been unable to meet the needs of real-time monitoring of urban environmental noise. Therefore, the Shanghai Institute 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, and created the first dynamic noise map system. [0003] The road...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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