Personnel positioning system and method in complex and unknown indoor environment

Abstract

The invention discloses a method and system for locating personnel in complex and unknown indoor environments. The method includes: in advance, according to the estimated information of the building, the position information of the three base stations set near the building and the position information between the base stations, modeling and generating the indoor structure diagram of the building and the location of the base stations in the building Schematic diagram of nearby locations; calculate the movement path of the person according to the person’s walking course, walking displacement, and walking time during the movement; extract the characteristic value of the collected data change, perform cluster analysis on the data change feature, and judge the current movement of the person Whether the state satisfies the geographic tag attribute, if it is satisfied, and there is a known geographic tag matching it, the current personnel position is matched to the corresponding geographic tag of the indoor structure diagram. The embodiments of the present invention have the advantages of complex application environment, high positioning accuracy, and good system stability, and are applicable to fire fighting, special police tasks or anti-terrorism exercises.

Description

technical field [0001] The invention relates to the technical field of navigation and positioning, in particular to a system and method for locating personnel in complex and unknown indoor environments. Background technique [0002] At present, my country is in a period of economic transition and social transformation, the pace of urbanization is accelerating, and various disaster-causing factors have increased significantly. Major fires and other disasters and accidents have occurred from time to time, and the scale of disasters has continued to expand. Facing the complicated situation of fire fighting and rescue, a problem that cannot be ignored is that the proportion of casualties among firefighters in our country is gradually increasing. According to statistics, in the 10 years from 1997 to 2006, 131 firefighters across the country died and 1,610 were disabled; and in just three years from 2007 to 2009, 153 firefighters died nationwide, and more than 500 people were disa...

AI Technical Summary

Problems solved by technology

However, these three positioning technologies all need to arrange nodes at known positions in the building in advance, the system is complicated and the cost is high

UWB positioning accuracy is higher, but the positioning distance is shorter; RFID system positioning accuracy is determined by the position of the reference tag, which will affect the positioning

In order to improve the positioning accuracy, the system needs to increase the density of reference tags. However, a higher density will cause greater interference and affect the signal strength.

Because the distance between the reference tag and the pending tag needs to be calculated by the Euclidean formula, the amount of calculation is large; the workload of WIFI positioning and data collection is heavy, and in order to achieve higher accuracy, the location measurement and calculation settings of fixed point APs are relatively cumbersome.

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