Indoor positioning approaches are often based on electromagnetic wave signals with high frequency. However, signal reflections and the corresponding signal superpositions are challenging. As a result, there is still no indoor positioning technology established in commercial products, such as smartphones or smartwatches. Recent publications have shown that this indoor positioning problem can be addressed by using artificial magnetic fields. However, the cubic attenuation of the magnetic field challenges technical implementations and limits the ranges. In this work, we propose an approach striving to address these issues of magnetic indoor positioning via a simple electromechanical single-anchor concept in combination with a small wearable sensor circuitry. The terrestrial magnetic field together with amplitude and phase measurements resolves the position and the orientation of the tag. The proposed indoor positioning approach via artificial magnetic fields is tested in a corridor for a spatial region of approximately 100 m 2 . The mean positioning error in this experiment was calculated to be μ = 1.0±0.81 m. The proposed indoor positioning approach via artificial magnetic fields and the corresponding measurement system can, therefore, be useful alternatives when considering applications in which simple implementation is more important than positioning precision.

中文翻译：

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通过人工磁场进行室内定位


室内定位方法通常基于高频电磁波信号。然而，信号反射和相应的信号叠加具有挑战性。因此，室内定位技术仍然没有在智能手机或智能手表等商业产品中建立。最近的出版物表明，可以通过使用人工磁场来解决室内定位问题。然而，磁场的立方衰减对技术实现提出了挑战并限制了范围。在这项工作中，我们提出了一种方法，通过简单的机电单锚概念与小型可穿戴传感器电路相结合，努力解决磁性室内定位的这些问题。地磁场与幅度和相位测量一起确定标签的位置和方向。所提出的通过人工磁场的室内定位方法在大约100 m 2 的空间区域的走廊中进行了测试。本实验中的平均定位误差经计算为μ = 1.0±0.81 m。因此，在考虑简单实现比定位精度更重要的应用时，所提出的通过人工磁场的室内定位方法和相应的测量系统可以成为有用的替代方案。