Wireless sensor network (WSN)-technology-based indoor three-dimensional accurate positioning method
Three-dimensional positioning results are continuously corrected on the three-dimensional route map by continuous circular testing to obtain accurate location coordinates.
Abstract
The invention discloses a wireless sensor network (WSN)-technology-based indoor three-dimensional accurate positioning method. WSN indoor three-dimensional accurate positioning is realized by the following steps of: 1) deploying sensor network nodes with known locations in a given area; 2) planning the sensor network nodes with the known locations in a three-dimensional relative coordinate system; 3) establishing a three-dimensional Hash table indicating correspondence between signal intensity and coordinate values in advance, and generating a table lookup KEY value; 4) generating a simple three-dimensional route map for the map of a given area according to possible routes; 5) synchronizing the time of each node by using a wireless sensor network time synchronization algorithm; 6) determining the three-dimensional locations of mobile nodes by continuously exchanging information between the continuously mobile sensor nodes and deployed fixed sensor network anchor nodes; and 7) receiving anchor node signals for many times, and looking up the three-dimensional Hash table to obtain the coordinate values for data fusion. Three-dimensional positioning results are continuously corrected on the three-dimensional route map by continuous circular testing to obtain accurate location coordinates.