High-precision positioning method for ultra-wideband non-line-of-sight transmission in complex environment

Abstract

The invention discloses a high-precision positioning method for ultra-wideband non-line-of-sight transmission in a complex environment. The method comprises the steps of: calculating the speed and direction of a target by utilizing a high-precision positioning result of an ultra-wideband algorithm under a line-of-sight transmission condition and employing an ultra-wideband-based indoor positioningsystem using a signal flight time algorithm for distance measurement; when the target enters an area which cannot be positioned by the ultra-wideband for the first time, calculating an entering coordinate, a walking-out coordinate and a path of the target in the area; when the target enters the same area which cannot be positioned by ultra-wideband for the second time and later, calculating an entering coordinate, a walking-out coordinate and a path in the area, and calculating an mean value so as to improve the accuracy; and completing the positioning of the target according to the obtainedspeed and direction of the target and the walking path in the area that cannot be positioned by ultra-wideband. By applying the method provided by the invention, the number of the beacon nodes capableof communicating with a label can be possibly less than 3 under the condition of non-line-of-sight transmission, and the positioning can still be completed by applying the method provided by the invention, so that the positioning robustness is improved.

Description

technical field [0001] The invention relates to a positioning technology, in particular to a high-precision positioning method for ultra-wideband non-line-of-sight transmission in complex environments. Background technique [0002] In an environment where satellite-based positioning cannot be applied, the positioning technology based on ultra-wideband communication is currently the most accurate positioning solution, and is often used in mines, warehouses, factories, prisons and other places for high-precision positioning. For example, early warning of workers entering dangerous areas, positioning of workers when disasters occur, tracking of key equipment, etc. Indoor positioning technology based on UWB communication can provide high positioning accuracy, but UWB signals are easily interfered by obstacles. In the field of indoor positioning, complex environments refer to non-line-of-sight communication, multi-path refraction, and electromagnetic interference caused by obsta...

AI Technical Summary

Problems solved by technology

[0003] In view of the shortcomings of the indoor positioning technology in the prior art that UWB signals cannot penetrate obstacles at all and cause positioning in extreme environments such as mines, the problem to be solved by the present invention is to provide high-precision UWB non-line-of-sight transmission in complex environments. positioning method

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