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A personnel evacuation model method for improving a cellular automaton

A cellular automata and personnel evacuation technology, applied in special data processing applications, instruments, electrical and digital data processing, etc. Effect

Inactive Publication Date: 2019-06-28
杨川
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Problems solved by technology

The continuous model mainly considers the microscopic characteristics of pedestrians, pays attention to the virtual with autonomous behavior, emphasizes the influence of psychological factors and the external environment on the operation behavior, and then simulates the individual behavior of the evacuated personnel, but the continuous model is usually more complicated and has a large amount of calculation. Computational efficiency is low in complex environments
The discrete model simulates the evacuation of people through certain rules. It is simple to calculate and runs fast, but it is difficult to capture individual behavior.

Method used

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  • A personnel evacuation model method for improving a cellular automaton
  • A personnel evacuation model method for improving a cellular automaton

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Embodiment Construction

[0022] Refer to attached figure 1 and figure 2 , Step 1: Divide the public area into smaller grids, that is, each grid point is smaller than the actual space occupied by pedestrians. It is stipulated that each pedestrian occupies 2╳2 grid points, the side length of the grid point is equal to the radius of the pedestrian, and the center of the pedestrian is the center of 4 grid points. The specific method is as follows: from the beginning to the end of the evacuation, pedestrians a in unit time t From m ( m >1) Select Export in Export i The probability p i for:

[0023] (1)

[0024] (2)

[0025] In the formula, f p is the coefficient of inertia, d i means pedestrian a arrive i the distance to the exit; N i Indicates the number of pedestrians in the 8╳8 grid point directly in front of the exit i.

[0026] Step 2: Calculate the degree of integration according to the social force model and select the appropriate exit, and determine the target position in ...

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Abstract

The invention relates to a personnel evacuation model method for improving a cellular automaton. The method comprises the following steps: step 1, randomly generating an initial speed at a t moment; Step 2, selecting an exit, and calculating pedestrian social force resultant force; Step 3, calculating pedestrian speed, and determining a pedestrian moving target position according to a moving rule;Step 4, performing one time step by the pedestrian; And step 5, determining whether the target position reaches an exit, and calculating evacuation time. Typical phenomena in behavior personnel evacuation, such as friction and collision between pedestrians, dynamic behavior selection exits, structures formed by gathering pedestrians near the exits, different moving modes of the pedestrians and the like, can be better described. The model method is high in operation speed and is closer to a real evacuation scene.

Description

technical field [0001] The invention relates to a personnel evacuation model method of an improved cellular automaton. Background technique [0002] In recent years, emergencies in public areas have continued to occur, such as the "Shanghai Bund Stampede" and "Paris Explosions", etc. The issue of evacuation of people in public areas has aroused widespread concern in the society. The personnel evacuation model is an important means for researchers to evacuate, how to simulate the evacuation process more accurately is the key to current research. [0003] The commonly used models are continuous model and discrete model. The continuous model mainly considers the microscopic characteristics of pedestrians, pays attention to the virtual with autonomous behavior, emphasizes the influence of psychological factors and the external environment on the operation behavior, and then simulates the individual behavior of the evacuated personnel, but the continuous model is usually more co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/26
Inventor 杨川
Owner 杨川
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