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Sensors 2015, 15(4), 7857-7877;

Using Multiple Barometers to Detect the Floor Location of Smart Phones with Built-in Barometric Sensors for Indoor Positioning

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
Author to whom correspondence should be addressed.
Academic Editors: Sisi Zlatanova and Kourosh Khoshelham
Received: 10 September 2014 / Revised: 13 March 2015 / Accepted: 24 March 2015 / Published: 31 March 2015
(This article belongs to the Special Issue Sensors for Indoor Mapping and Navigation)
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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. View Full-Text
Keywords: floor positioning; barometer; smart phones floor positioning; barometer; smart phones

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Xia, H.; Wang, X.; Qiao, Y.; Jian, J.; Chang, Y. Using Multiple Barometers to Detect the Floor Location of Smart Phones with Built-in Barometric Sensors for Indoor Positioning. Sensors 2015, 15, 7857-7877.

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