Xia Hao, Wang Xiaogang, Qiao Yanyou, Jian Jun, Chang Yuanfei
The Institute of Remote Sensing and Digital Earth, No.20 Datun Road, Chaoyang District, Beijing 100101, China.
Sichuan Geological Survey, No.25 Renmin Road, Chengdu 610081, China.
Sensors (Basel). 2015 Mar 31;15(4):7857-77. doi: 10.3390/s150407857.
Following the popularity of smart phones and the development of mobile Internet, the demands for accurate indoor positioning have grown rapidly in recent years. Previous indoor positioning methods focused on plane locations on a floor and did not provide accurate floor positioning. In this paper, we propose a method that uses multiple barometers as references for the floor positioning of smart phones with built-in barometric sensors. Some related studies used barometric formula to investigate the altitude of mobile devices and compared the altitude with the height of the floors in a building to obtain the floor number. These studies assume that the accurate height of each floor is known, which is not always the case. They also did not consider the difference in the barometric-pressure pattern at different floors, which may lead to errors in the altitude computation. Our method does not require knowledge of the accurate heights of buildings and stories. It is robust and less sensitive to factors such as temperature and humidity and considers the difference in the barometric-pressure change trends at different floors. We performed a series of experiments to validate the effectiveness of this method. The results are encouraging.
随着智能手机的普及和移动互联网的发展,近年来对精确室内定位的需求迅速增长。以往的室内定位方法侧重于楼层平面位置,并未提供精确的楼层定位。在本文中,我们提出一种方法,该方法使用多个气压计作为参考,用于对内置气压传感器的智能手机进行楼层定位。一些相关研究使用气压公式来研究移动设备的海拔高度,并将海拔高度与建筑物中各楼层的高度进行比较以获取楼层数。这些研究假定各楼层的精确高度是已知的,但实际情况并非总是如此。它们也没有考虑不同楼层气压模式的差异,这可能导致海拔计算出现误差。我们的方法不需要了解建筑物和楼层的精确高度。它具有鲁棒性,对温度和湿度等因素不太敏感,并考虑了不同楼层气压变化趋势的差异。我们进行了一系列实验来验证该方法的有效性。结果令人鼓舞。