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 lack of individual's cognition and analysis of the environment, unable to simulate individual behaviors and actions realistically, so as to optimize the actual evacuation process, The effect of improving evacuation efficiency

Active Publication Date: 2018-07-10
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

Method used

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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]Embodiment 2: Another embodiment of the present invention is a crowd evacuation simulation system under a sudden event, including: an evacuation scene analysis unit (exit position, obstacle position, wall position, etc.), an acquisition unit ( Calculated by using a modified social force model), it is used to obtain the evaluation information of the path in the evacuation scene in real time; the path selection unit based on the pseudo-random strategy of the roulette strategy and the stability factor; realizes the evacuation behavior simulation of the crowd in an emergency. The above functions are realized by means of computer programming.

Embodiment 3

[0090] like figure 2 As shown, there are 600 people in the actual scene 25m×20m plane area to carry out individual group evacuation simulation, such as Figure 3 to Figure 7 shown. The scene contains 2 exits, both of which have a width of 2m and an obstacle, forming a relatively loose evacuation area and a relatively narrow evacuation area. image 3 is the initial position distribution of individuals, and the individuals are relatively evenly distributed in the scene. Figure 4 is the distribution of the crowd at the initial stage of evacuation. Figure 5 In order to evacuate the distribution of the crowd in the mid-term, it can be seen that although the left area is relatively empty, there are still pedestrians who choose to exit from the right. Pedestrians on the left, because the path length cost of choosing the right exit is too high, so they do not choose the right exit, but still choose the left exit to wait for evacuation. This shows that the working hours are in li...

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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 of various large-scale gatherings, safety accidents such as crowding and stampede that may occur under such circumstances have brought huge losses of life and property to the country and the people. The main reason is that when the crowd density is high, individual flow The crowds are squeezed and intertwined with each other, making the crowd in a highly unstable state, and the necessary means to reduce the occurrence of such safety accidents are early warning and effective control. [0003] However, there are great limitations in the actual drill process of safety hazards, such as: complex individual movements lead to no reproducibility of the test process, the safety of the drillers cannot be effectively guaranteed, etc., ...

Claims

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Application Information

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Patent Type & Authority Patents(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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