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Crowd evacuation bottleneck congestion condition analysis method and system

An analysis method and congestion state technology, applied in the field of data processing, can solve problems such as accidents and achieve a reasonable internal layout of the building

Pending Publication Date: 2021-01-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, it is agreed that the crowd density during the evacuation process should not exceed 3.8 people / m 2 , reaching this density means that the walking speed of the crowd is close to "0". If it is affected by a certain factor, the crowd density will rise to 4.2 people / m 2 , there is a high probability of an accident

Method used

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  • Crowd evacuation bottleneck congestion condition analysis method and system
  • Crowd evacuation bottleneck congestion condition analysis method and system
  • Crowd evacuation bottleneck congestion condition analysis method and system

Examples

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Embodiment 1

[0076]First of all, building networking is a function included in many commercial crowd evacuation simulation software. It is used to determine the direction of crowd flow. When the start and end points are determined, different evacuation routes can be calculated according to the specific conditions of the distance. ", the default "Occupant (Occupant)" will choose the least costly distance. Perform A* algorithm calculation on each node with crowd load, and get the evacuation route of each node with crowd load. In this algorithm, the exit is defined as a level 1 node, the node directly connected to the exit is defined as a level 2 node, and so on. The farther away the node is from the exit, the higher the level. When a node can be regarded as a node of multiple levels at the same time, take the minimum value. Mark the different node numbers as Oij (O is Occupant, evacuated personnel, i=floor to which this room belongs, j=number of this room on this floor), Oij The value of is the cr...

Embodiment 2

[0129]image 3 This is a networked evacuation network diagram provided by an embodiment of the present invention, taking a staircase safety passage of a teaching building and its connected classrooms as an example to illustrate the implementation of the present invention. Select the 1st to 3rd floor, each floor has a classroom. Based on the above calculation process, the entire evacuation process lasts for 149s, which is not convenient to display all. Therefore, some key time nodes are selected, and Tables 1 to 5 are obtained:

[0130]Table 1

[0131] Time(s) event 0Start to evacuate 16Nodes 21 and 11 start to enter the transportation state 33Channel 1121 ends the transportation state and enters the supply state 5421 nodes enter a congested state 7812, 13, 1112, 1113 enter the empty state 8321 nodes end congestion state 149All nodes and channels are empty and the evacuation ends

[0132]According to the calculation results, the congestion condition of the 21 nodes is acceptable, the...

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Abstract

The invention provides a crowd evacuation bottleneck congestion condition analysis method and system, and the method comprises the steps: constructing an evacuation network according to the layout condition of a building, and enabling the evacuation network to comprise nodes and edges for connecting the nodes; determining the shortest path from each node in the evacuation network to an exit; and in the crowd evacuation process, determining people flow data corresponding to the bottleneck position on the shortest path. According to the method, people flow data of different bottleneck positionsof any building can be obtained, so that guidance is provided for safe evacuation; a user can understand the topological structure of the building from the perspective of the graph theory, so that thearchitecture suggestion of the evacuation network is given in the early stage of building design, and the internal design of the building is more reasonable.

Description

Technical field[0001]The invention relates to the technical field of data processing, in particular to a method and system for analyzing the bottleneck and congestion conditions of crowd evacuation.Background technique[0002]With the increase in the rate of urbanization in my country, there are more and more large-scale crowd gathering activities, which also brings greater safety challenges to relevant managers. In the process of emergency evacuation, the danger at the bottleneck is obviously higher than the danger at other locations in the building. Therefore, it is necessary to focus on the safety issues at the bottleneck in a medium-to-high crowd density building.[0003]At present, it is agreed that the crowd density during the evacuation process should not be greater than 3.8 people / m2, Reaching this density means that the walking speed of the crowd is close to "0". If it is affected by a certain factor, the crowd density will rise to 4.2 people / m2, There is a great probability of...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06Q10/04
CPCG06F30/13G06Q10/047
Inventor 麻庭光王佐付殷驰龚云涛
Owner SHANGHAI INST OF TECH
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