Real-time estimation method for city canyon street motor vehicle pollutant emission and dispersion

A pollutant discharge and urban canyon technology, which is applied in the traffic control system of road vehicles, computing, special data processing applications, etc., can solve the problem that it is difficult to accurately and real-time determine the concentration of environmental pollutants in urban canyon streets, and achieve real-time improvement. efficiency and accuracy, accuracy of emission factor data, effects of improved accuracy and reliability

Inactive Publication Date: 2016-03-23
BEIJING UNIV OF TECH
View PDF4 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the differences in time and space conditions and the dependence on meteorological conditions, it is difficult to determin

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Real-time estimation method for city canyon street motor vehicle pollutant emission and dispersion
  • Real-time estimation method for city canyon street motor vehicle pollutant emission and dispersion
  • Real-time estimation method for city canyon street motor vehicle pollutant emission and dispersion

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0045] The present invention will be further described below in conjunction with the drawings.

[0046] The first part is traffic modeling and simulation. The invention firstly models and simulates the urban road network based on the CTM model.

[0047] Discretize space and time according to the CTM model. Spatial discretization is the cell division method. The street section is divided into multiple cells with the same length, and the time is divided into equal time intervals as the time step, and it is satisfied that within a time step, the vehicle is at the maximum speed The distance traveled is less than the cell length. The cell division method of the present invention is as follows: the cell length is selected as 1 meter, the time interval is t seconds, l generally takes 20, and t generally takes 1. The specific division steps are as follows:

[0048] (1) The target area is divided into n links with intersections and area boundaries as nodes. Each link is divided into two p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a city canyon street pollutant real-time estimation method to estimate concentration values of different pollutants mainly generated by motor vehicle tail gas emission in a city canyon street in real time. According to the method, a model is used for simulating the road traffic state, and traffic parameters are estimated in real time; in combination with emission factors of a motor vehicle, road pollutant emission is estimated; a dispersion model is used for estimating pollutant dispersion concentration in street air in real time; finally, the calculated pollutant concentration values are displayed on a map in real time. According to the method, a GPS module of a smartphone is utilized for being combined with a VSP module to calculate the motor vehicle emission factors, the real-time property and accuracy of the model are improved in a convenient and low-overhead mode, and by means of a map interface, the calculation result is converted into intuitive and visual pollutant concentration data for users to refer to.

Description

technical field [0001] The invention belongs to the field of intelligent transportation systems, and relates to road traffic simulation, motor vehicle exhaust emission and the diffusion of pollutants in urban canyon roads. Due to differences in time and space conditions and dependence on meteorological conditions, it is currently difficult to accurately and real-time understand the concentration of pollutants in the road environment . The invention combines a traffic model, a pollutant discharge model and a diffusion model to estimate the concentration of air pollutants in urban canyon streets in real time. Background technique [0002] With the sustained and rapid economic development, the number of motor vehicles in my country's cities has shown a substantial increase. Subsequently, urban traffic congestion is increasing day by day, and motor vehicle exhaust pollution is serious. Motor vehicle exhaust emissions are closely related to the quality of the urban air environm...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/50G08G1/01
CPCG06F30/367G08G1/0104
Inventor 张利国许超刘慧超
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap