BIM-based automated determination of exit sign direction for intelligent building sign systems: Fid-Bau Portal

BIM-based automated determination of exit sign direction for intelligent building sign systems

Fu, Meiqing / Liu, Rui

Abstract This study proposes an approach named automated determination of exit sign direction (ADESD) to automatically determine the directions of building exit signs. ADESD generates sign directions for a building by four steps: generate an indoor navigation graph network of the building; integrate exit signs into the navigation network; calculate recommended directions of exit signs based on their shortest accessible evacuation routes, and calculate negated directions of exit signs corresponding to hazardous areas. Novel algorithms are proposed in ADESD to generate spatial relationship between exit signs and exits automatically and determine exit sign directions accurately. A case study is used to validate the feasibility of ADESD. The results demonstrate that ADESD can efficiently calculate both the recommended and negated directions of an intelligent dynamic exit sign system to respond to a fire emergency with real-time information.

Highlights • A novel approach is developed to automatically set exit sign directions. • Indoor navigation network is adopted to build exit sign network. • Novel algorithms for determining recommended and negated directions are developed.