Semi-Analytical Orientation Method Based on Geomagnetism and Spatial Context Information

LIU Gong-xu; GAO Xin-bo; HE Li-huo; XIE yu; LU Jian-min

doi:10.12263/DZXB.20200797

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Semi-Analytical Orientation Method Based on Geomagnetism and Spatial Context Information

PAPERS | 更新时间：2025-12-08

- Semi-Analytical Orientation Method Based on Geomagnetism and Spatial Context Information
- ACTA ELECTRONICA SINICA Vol. 50, Issue 1, Pages: 116-123(2022)
- 作者机构：
  
  1.西安电子科技大学电子工程学院超高速电路设计与电磁兼容教育部重点实验室，陕西西安 710071
  2.重庆邮电大学图像认知重庆市重点实验室，中国重庆 400065
  3.山西大学计算智能与中文信息处理教育部重点实验室，山西太原 030006
- 作者简介：
- 基金信息：
- DOI：10.12263/DZXB.20200797
  CLC： V241.61;P318.6
- Received：28 July 2020，
  
  Revised：2021-06-15，
  
  Published：25 January 2022
- 稿件说明：
移动端阅览
刘公绪,高新波,何立火等.基于地磁与空间上下文信息的半解析定向方法[J].电子学报,2022,50(01):116-123.

LIU Gong-xu,GAO Xin-bo,HE Li-huo,et al.Semi-Analytical Orientation Method Based on Geomagnetism and Spatial Context Information[J].ACTA ELECTRONICA SINICA,2022,50(01):116-123.
刘公绪,高新波,何立火等.基于地磁与空间上下文信息的半解析定向方法[J].电子学报,2022,50(01):116-123. DOI： 10.12263/DZXB.20200797.

LIU Gong-xu,GAO Xin-bo,HE Li-huo,et al.Semi-Analytical Orientation Method Based on Geomagnetism and Spatial Context Information[J].ACTA ELECTRONICA SINICA,2022,50(01):116-123. DOI： 10.12263/DZXB.20200797.

摘要

在物联网时代，人们对高精度的、普适的室内定位需求日益迫切.然而鲁棒的技术方案仍没有出现，其中一个难点是用好地磁解决室内人员的定向问题.众所周知，在空旷的室外环境可以基于地磁解析定向的方法实现定向，然而室内地磁往往存在严重的磁失真，使得该方法不再适用.为解决上述问题，本文提出一种半解析定向方法.该方法首先将解析定向结果与基于空间上下文信息提取的走廊结构的几何关系进行融合，得到修正的定向结果，并通过磁失真度量和判断确定融合系数；进而深入分析了不同融合系数对定向结果的影响.测试结果表明，与现有方法相比，所提出的方法具有较好的鲁棒性，可以有效改善定向精度，广泛用于基于路径的或基于走廊的定位定向场合.

Abstract

In the era of the Internet of Things(IoT)

the demand is increasingly urgent in terms of high-precision and ubiquitous indoor positioning. However

it lacks robust technical solutions

and one of the challenges is to solve the orientation problem for indoor pedestrians by making good use of geomagnetic field. As we all know

the orientation can be acquired through analytical method based on geomagnetic field in the open outdoor environment

while it is difficult to apply the analytical method in indoor environments when taking the serious magnetic distortion into consideration. In order to solve the above issues

this paper proposes a semi-analytical orientation method. Firstly

the proposed method can get the corrected results by the fusion of the result from analytic orientation with that from the geometric relationship of the corridor structure extracted based on the spatial context information

and the fusion coefficient is determined through the magnetic distortion measurement and judgment. Then we deeply analyzed the influence of different coefficients on the results. Finally

the test results show that the proposed method has good robustness and can effectively improve the orientation accuracy compared with the existing methods

and can be widely used in path-based or corridor-based positioning and orientation scenarios.

关键词

Keywords

references

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