基于建筑材料改良的室内定位地磁指纹库构建方法

An Improved Database Construction Method of Indoor Geomagnetic Fingerprint Location Based on Building Material

利用室内环境下地磁磁通量受到建筑材料影响而拉伸的特性,提出一种改良的室内定位地磁指纹库构建方法,减少前期构建数据库的时间和人力消耗。通常的建筑材料包含有钢筋混凝土或者H型钢,这些材料会影响室内地磁值的分布,不同位置的磁通量不相同且整体的磁场拉伸呈现一定的规律性。进而在现有的地磁指纹室内定位方案中利用这种位置特性,在构建数据库的时候考虑加入采样点间距,利用样条插值的方式构建数学模型,构建出有效的指纹数据库。实验证明提出的方法不仅减少构建数据库的消耗,还加快构建数据库的时间。

Proposes an improved method of building indoor geomagnetic fingerprint database,which reduces the time and manpower consumption of building the database.Usually the building materials include reinforced concrete or H-shaped steel,these materials will affect the distribution of indoor magnetic field.The magnetic flux at different locations is different and the overall magnetic field tension shows a certain regularity.Then in the existing geomagnetic fingerprint indoor positioning scheme,this position characteristic is used to construct the database, considering the addition of sampling points spacing,using the spline interpolation method to build a mathematical model,to build an effective fingerprint database.Experiments show that the proposed method not only reduces the consumption of building the database,but also speeds up the time of building the database.