Crowd evacuation simulation method and system based on evacuation path set

A technology of path collection and simulation method, applied in the direction of design optimization/simulation, prediction, instrument, etc., can solve the problems of inability to simulate individual behaviors and actions, lack of individual cognition and analysis of the environment, etc., to optimize the actual evacuation process, The effect of improving evacuation efficiency

Active Publication Date: 2017-09-29
SHANDONG NORMAL UNIV
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Problems solved by technology

Helbing and Molnar proposed that the social force model only simulates crowd behavior based on the formula of Newtonian mechanics. Although it can well reproduce some evacuation phenomena, such as "fast is slow", "arch effect", etc., the model oversimplifies the individual lack of individual cognition and analysis of the environment, so it cannot truly simulate the behavior of individuals during emergency evacuation

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  • Crowd evacuation simulation method and system based on evacuation path set
  • Crowd evacuation simulation method and system based on evacuation path set
  • Crowd evacuation simulation method and system based on evacuation path set

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Embodiment 2

[0088] Another embodiment of the present invention is a crowd evacuation simulation system under emergencies, including: an evacuation scene analysis unit (exit position, obstacle position, wall position, etc.), and an available evacuation path acquisition unit (using a modified social force Model calculation), used to obtain real-time evaluation information of the path in the evacuation scene; the path selection unit based on the pseudo-random strategy and stability factor of the roulette strategy; realize the simulation of crowd evacuation behavior under emergency. The above functions are realized by means of computer programming.

Embodiment 3

[0090] Such as figure 2 As shown, there are 600 people in the actual scene of 25m×20m plane area ascending individual group evacuation simulation, such as Figure 3 to Figure 7 Shown. The scene contains 2 exits, each with a width of 2m and an obstacle, forming a relatively loose evacuation area and a relatively narrow evacuation area. image 3 It is the initial position distribution of individuals, and individuals are relatively evenly distributed in the scene. Figure 4 It is the distribution of the crowd at the beginning of the evacuation. Figure 5 For the distribution of the crowd in the middle of the evacuation, it can be seen that although the left area is relatively empty, there are still pedestrians choosing to output from the right. The main reason is that the left exit is too blocked and pedestrians abandon the left exit; For pedestrians on the left, the path length of choosing the right exit is too costly, so instead of choosing the right exit, they still choose the ...

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Abstract

The invention discloses a crowd evacuation simulation method and system based on an evacuation path set. The method includes the steps: extracting characteristics of an evacuation scene to obtain a two-dimensional model of the evacuation scene; acquiring all available evacuation paths based on the two-dimensional model of the evacuation scene and a social force model fusing obstacle avoiding strategies to obtain the evacuation path set; performing discretization operation on all paths in the evacuation path set, and calculating crowd distribution degree and block degree information in real time to obtain evaluation values of each individual in crown for the all paths in the evacuation path set; building a roulette according to the evaluation values of each individual in the crown for the all paths in the evacuation path set, and selecting an optimum evacuation path by the aid of pseudo random selection strategies based on the roulette and stable factors to achieve simulation of crowd evacuation processes. According to the method, evacuation strategies are changed in real time by a simulation individual according to current evacuation environments, and safety evacuation plans of sudden events can be scientifically guided.

Description

Technical field [0001] The invention relates to the field of crowd evacuation computer simulation, in particular to a crowd evacuation simulation method and system based on an evacuation path set. Background technique [0002] Due to the gradual increase in various large-scale gatherings, safety accidents such as crowding and trampling that may occur in this case bring huge losses to the country and people in life and property. The main reason is that when the crowd density is high, the individual flow There are mutual squeezing and interweaving, making the crowd in a highly unstable state, and the necessary means to reduce the occurrence of such safety accidents is early warning and effective control. [0003] However, the actual exercise process for safety hazards has great limitations, such as: complex individual movement causes no reproducibility of the test process, and the safety of exercise personnel cannot be effectively guaranteed. Therefore, it has the advantages of safet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q10/04G06Q50/26
CPCG06F30/20G06Q10/047G06Q50/265
Inventor 刘弘韩延彬
Owner SHANDONG NORMAL UNIV
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