Abstract:

The research on the early warning means of collapseof building structure in fire accidents is an urgent need for currentbuilding fire extinguishing and rescue.The author combedand analyzed the characteristics of the proposed collapse warning means, pointed out their advantages and disadvantages,emphaticallyaddressed the application of Interferometric Radar,and tested the performance of radar waves penetrating localizedfire plumes in large space.The results indicate that: the currentearly warning means are mainly focused on "single point detection",and the application in some typical building fires is limited;the interference radar wave is basically not influenced by theflame of oil pan, and the total error of device is in the submillimeterlevel, but attention should be paid to distinguish the deformationcaused by some non- structural elements.It is suggestedthat the method of obtaining the spatial coordinates of key memberthrough the combined use of multiple radars should be improved,and the early warning device and algorithm based on regionaldetection should be built, and the deformation monitoringmeans for the whole life cycle of important buildings should be developed.

Key words:  fire protection, building fire, collapse warning, radarsystem, deformation monitoring