基于IFC的室内地图模型构建研究

Research on the Construction of Indoor Map Model Based on IFC

室内地图构建属于一项基础性研究,可为导航、疏散等建筑室内智能化应用提供数据与技术支持。室内环境的复杂性,存在信息提取耗时且成本高,提取的室内信息不完整等问题,而已有的室内地图模型通常体量庞大,数据复杂且冗余严重,实用性较低。为此,将BIM技术与室内地图研究相结合,以BIM通用交互格式工业基础类(IFC)文件为数据源,提取几何与语义信息,提出一种室内地图模型的构建方法。内分类定义地图节点,完成对建筑室内信息的抽象表达;通过设置阈值来简化地图中节点数量以达到模型的优化。该模型中可导入经典寻路算法生成最短路径,并且设计路径优化方法。

Indoor map model construction is a basic research,which can provide data and technical support for indoor intelligent applications such as indoor navigation,emergency evacuation,and robot services.Traditional indoor information extraction methods are time-consuming and costly,and the extracted indoor information is usually incomplete.In the existing indoor map research,the model usually has a large volume,the data is complex and the redundancy is serious,and the application rate is low.With the development of BIM technology and the advancement of national policies,this study provides new ideas for indoor map model research.The paper combines BIM technology with indoor map model research,using BIM universal interactive format(industry foundation classes)IFC file as data source to extract geometric and semantic information and puts forward a new construction method of indoor map model.By defining three types of nodes in the model,the abstract expression of the internal information of the building monolayer is completed.Using the idea of node normalization,set the threshold to simplify the number of nodes in the indoor topology network and achieve the purpose of optimizing the indoor map model.In the indoor map model,the shortest path can be generated by the classic path finding algorithm,and the design algorithm will realize the path optimization.