Escape path planning method based on BIM technology

Abstract

The invention discloses an escape path planning method based on a BIM technology, and the method comprises the steps: building fire simulation through fire-fighting dynamic simulation software, setting an infrared camera and a smoke alarm in a building as nodes, carrying out parameter initialization, then, calculating the probability of a trapped person k from the node i to the node j according to a state transition probability formula and selecting the next node for thetrapped person, wherein tauij (t) represents pheromones on a path from the node i to the node j at the moment t, alpha is an information heuristic factor and reflects the importance of a track, beta is an expected heuristic factor and reflects the importance of visibility, and eta ij (t) is a heuristic function; and guiding the trapped person to move to the node where the pass time and smoke amout are comprehensive smaller. The escape safety route is dynamically planned for the trapped person in real time by combining the dynamic fire behavior model of the building model BIM, so that the escape probability of the trapped person in a fire disaster is improved, and safe escape in a fire scene is realized.

Description

technical field [0001] The invention relates to the technical field of construction software BIM, in particular to a method for planning an escape route based on BIM technology. Background technique [0002] With the development of society and economy, the floor area of ​​modern buildings is getting bigger and bigger, the floor design is also getting higher and higher, and the structure is also more and more complex. Due to the many routes in interior design, people are easy to get lost in the building, especially when an emergency occurs, it is not easy to find a better escape route at the first time. [0003] The fire is a process of continuous spread. Only planning the escape route based on the current fire situation cannot ensure the safety of the escape route at the next moment. Moreover, the escape personnel are constantly moving, and the position cannot be sensed at each moment, so the current escape route cannot be guaranteed. The escape route is the safest escape r...

AI Technical Summary

Problems solved by technology

Due to the many routes in interior design, people are easy to get lost in the building, especially when an emergency occurs, it is not easy to find a better escape route at the first time

[0003] The fire is a process of continuous spread. Only planning the escape route based on the current fire situation cannot ensure the safety of the escape route at the next moment. Moreover, the escape personnel are constantly moving, and the position cannot be sensed at each moment, so the current escape route cannot be guaranteed. The escape route is the safest escape route

[0004] In the existing escape path planning methods, generally only the shortest path from the fire point to the building exit is obtained, but such a shortest path is not necessarily the optimal path during the escape process. There are three main reasons: 1. When a fire breaks out , if the crowd is guided to evacuate to the nearest exit, it is easy to cause congestion at the exit and even lead to a stampede

2. The shortest path is not necessarily the fastest path. For example, when passing through narrow areas such as stairs, the passing time will be slower

3. There may already be a large amount of smoke on the shortest path, and evacuating according to the shortest path may inhale too much smoke and cause danger

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