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Multi-exit evacuation method based on prediction time

A technology for predicting time and multiple exits, applied in the field of traffic simulation, can solve problems such as poor evacuation effect of crowds, long evacuation time, etc., achieve remarkable effect, strong predictive universality, and ensure the effect of evacuation

Active Publication Date: 2018-09-28
BEIHANG UNIV
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Problems solved by technology

[0006] In order to solve the shortcomings of long evacuation time and poor evacuation effect (neglecting the individual differences of the crowd and the expected speed of the evacuation crowd) existing in the traditional evacuation strategy planning model, the present invention provides a comprehensive definition by the predicted evacuation speed and the corresponding exit width. Calculation method of evacuation time

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  • Multi-exit evacuation method based on prediction time

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Embodiment Construction

[0036] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0037] The present invention is a multi-exit evacuation method based on predicted time, which specifically includes the following steps:

[0038] The first step is to design the calculation method of evacuation time prediction:

[0039] The optimization and proposal of the evacuation strategy is verified through the simulation scene. The typical scene used in the present invention is a room with a door in each of the four directions of up, down, left, and right, such as figure 1 shown. The shape of the room is a standard square, and the positions of each of the four exits are randomly distributed on the corresponding walls and their widths are different. There are two circular obstacles near the middle of the room to make the simulation more general. Before an emergency occurs, the crowd is evenly and randomly distributed throughout the room, and d...

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Abstract

The invention discloses a multi-exit evacuation method based on prediction time. The multi-exit evacuation method comprises the following steps: 1, proposing prediction evacuation time to acquire a formula; 2, carrying out optimal planning based on a global path of A* algorithm; and 3, calculating a formula of exit evacuation capability. According to the multi-exit evacuation method based on the prediction time disclosed by the invention, by fully taking consideration of key points including a distance of every pedestrian to the exits, pedestrian expected speed, the total number of the pedestrians corresponding to each exit and different evacuation capability of different width exits, of crowd evacuation from multiple exits, a calculation method of evacuation time required by selection ofdifferent exits by the pedestrian is given, and the evacuation is simulated according to actual scenes. An experimental result proves that compared with a conventional mode, the time prediction modeldisclosed by the invention has the advantages that the evacuation to the pedestrian is simulated and predicted preferably, and effective help is provided for drawing an emergent evacuation plan.

Description

technical field [0001] The invention relates to traffic simulation technology, in particular to a crowd evacuation method based on predicted evacuation time, which is used to improve crowd evacuation efficiency in emergency situations. Background technique [0002] Crowd evacuation is an important issue in the safety of urban buildings, because crowds often block the exits or passages. In order to prevent stampede accidents from endangering people's lives, establishing a reasonable crowd evacuation model can assist researchers to more accurately analyze the dynamic relationship between exits and evacuated crowds. By establishing models and simulating, it is possible to effectively analyze the crowd activity status and exit blockage in emergency situations. [0003] Evacuation strategy (when a crisis occurs, use a certain algorithm to calculate the optimal evacuation method for each person, and use the display screen information prompts to achieve the purpose of quickly evac...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/26
CPCG06Q10/047G06Q50/265
Inventor 宋晓陈凯袁春雄韩道麟孙镜涵张增辉
Owner BEIHANG UNIV
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