UWB multi-antenna positioning method

Abstract

The invention provides a UWB multi-antenna positioning method, which belongs to the technical field of positioning. The method specifically comprises the steps that a UWB base station is fixedly arranged indoors and is provided with a plurality of antennas; timestamps of data packet sending and data packet receiving between a to-be-tested identification card and the UWB base station are respectively obtained, and the relative distance between the to-be-tested identification card and the base station is respectively calculated according to the timestamps; and phases are acquired when different antennas receive UWB signals, and an orientation value of the identification card to be tested is acquired according to the phase difference and the relative distance. Through the processing scheme provided by the invention, a rapid and efficient positioning mode is realized, and the calculation amount is reduced.

Description

technical field [0001] The invention relates to the field of positioning, in particular to a UWB multi-antenna positioning method. Background technique [0002] Traditional GPS has low accuracy and cannot be used indoors or in environments with large building blocks. The target tracking technology based on monocular vision has a large amount of calculation, cannot be tracked by blocks, and is difficult to recover the relative position information of the target. Problem Although Bluetooth and RFID positioning technologies are less disturbed by the environment, they have a short working distance and weak communication capabilities, making it difficult to integrate into other systems; infrared technology consumes a lot of power and is often blocked by indoor walls or objects. The accuracy of ultrasonic positioning is poor; the accuracy of ultrasonic positioning can reach centimeter level, and the accuracy is relatively high, but the ultrasonic attenuation is obvious during the ...

AI Technical Summary

Problems solved by technology

[0002] Traditional GPS has low accuracy and cannot be used indoors or in environments with large building blocks. The target tracking technology based on monocular vision has a large amount of calculation, cannot be tracked by blocks, and is difficult to recover the relative position information of the target. Problem Although Bluetooth and RFID positioning technologies are less disturbed by the environment, they have a short working distance and weak communication capabilities, making it difficult to integrate into other systems; infrared technology consumes a lot of power and is often blocked by indoor walls or objects. Poor performance; ultrasonic positioning accuracy can reach centimeter level, the accuracy is relatively high, but the ultrasonic attenuation is obvious during transmission, which affects the effective range of its positioning, and the cost is high

Most of the traditional UWB (Ultra Wideband) positioning technology installs multiple fixed micro base stations indoors to perform accurate indoor positioning on the same identification card in the same environment in real time, and displays the position of the identification card to the control center with zero delay. Real-time monitoring of the location of the identification card is realized, but once the identification card moves, the identification card cannot be accurately positioned

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