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A uwb-based indoor positioning method and system

A technology for indoor positioning and positioning nodes, which is applied in the field of UWB-based indoor positioning methods and systems, can solve the problems of positioning result deviation and positioning system influence, and achieve the effect of improving accuracy and improving fitting effect

Active Publication Date: 2021-11-12
武汉丰隆康盛信息技术有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the radiation pattern and reception pattern of the ultra-wideband radio antenna will affect the positioning system based on the ultra-wideband signal, resulting in deviation of the positioning results

Method used

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  • A uwb-based indoor positioning method and system

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Embodiment 1

[0023] This embodiment provides a UWB-based indoor positioning method, the implementation process of the method is as follows figure 1 As shown, specifically, the method includes:

[0024] Step S1, deploying several UWB anchor points, arranging multiple UWB anchor points at the corners of the indoor environment, it should be ensured that the coverage of the anchor points can cover the entire indoor area. The deployed UWB anchor point should be kept parallel to the indoor ground surface to reduce errors, and measure its indoor 3D coordinates, that is, the coordinates of the UWB anchor point deployment point, and then store them in the node to be positioned; in addition, each UWB anchor point All correspond to establish a three-dimensional Cartesian coordinate system for the calculation of subsequent relative poses.

[0025] Step S2, after obtaining the arrival time difference between the information of any two UWB anchor points and the node to be positioned based on the TDOA a...

Embodiment 2

[0050] Based on the same inventive concept as the method embodiment above, this embodiment provides a UWB-based indoor positioning system, specifically, the system includes: a memory, a processor, and a computer stored in the memory and operable on the processor Program, when the computer program is executed by the processor, the steps of the UWB-based indoor positioning method are realized.

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Abstract

The present invention provides a UWB-based indoor positioning method and system. The method includes: deploying several UWB anchor points, obtaining the time difference of arrival of information of any two UWB anchor points based on the TDOA algorithm to the node to be positioned, and obtaining the arbitrary The arrival distance difference between two UWB anchor points and the node to be positioned; the inertial measurement unit is deployed on the node to be positioned; the arrival distance difference is predicted based on the relative pose relationship between any two UWB anchor points and the node to be positioned Deviation value; use the arrival distance difference deviation value to correct the arrival distance difference, and obtain the coordinates of the node to be positioned based on the corrected result. When the present invention obtains the deviation value of the distance difference, the historical pose relationship sequence and the residual sequence can be used to allow the network to better learn the change characteristics of the pose, thereby improving the fitting effect; at the same time, two reflections are added to the network The consistency coefficient of the sequence change consistency of the anchor point's historical pose relationship improves the accuracy of the network output results.

Description

technical field [0001] The invention relates to the field of wireless positioning, in particular to a UWB-based indoor positioning method and system. Background technique [0002] Indoor positioning systems face many difficulties in practical applications. Optical systems may not be available in emergency situations due to fire and smoke; signal strength-based systems are sensitive to fading effects; fingerprint recognition systems require a dedicated training phase; There are advantages such as capabilities in radio devices (such as smartphones), potential for low-power implementation, and modest infrastructure requirements, however, they face challenging performance impairments caused by propagation effects such as strong reflections or diffuse scattering. [0003] Positioning based on a large signal bandwidth has two main advantages over the above positioning methods: first, the achievable accuracy is increased due to low latency; second, the line-of-sight (LOS) path can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W4/33G06N3/04G01S5/02G01C21/16
CPCH04W64/00H04W64/006H04W4/33G01S5/02G01C21/16G06N3/045
Inventor 贺震
Owner 武汉丰隆康盛信息技术有限公司
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