A Study for Integrated Robots and Sensor Devices to Develop Indoor Positioning Techniques by using smartphones

• Main Authors: Wei-Jen Chien, 錢為任
• Other Authors: Sheng-Cheng Yeh
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/00977063970593524706

碩士 === 銘傳大學 === 資訊傳播工程學系碩士班 === 100 === Nowadays most of the smart phones have built-in GPS and lots of sensor modules, such as accelerometers, orientation sensors and camera devices. As time goes on, the wireless communication network develops quickly and therefore the Location-Based Service (LBS) becomes popular issue gradually. Outdoor position systems are used to apply the GPS for the navigation of vehicle and scheming routes. The main way of these is with receiving signals from three or more satellites to obtain user''s location through triangulation principle. Nevertheless it’s necessary to keep the satellite in Line Of Sight (LOS) to perform effectively and accurate localization. The Microsoft Laboratory proposed the RADAR (Radio Detection and Ranging) system in 2000 which is outstanding technique in the region of indoor position and this research can be applied to Wireless LAN (Wi-Fi) for following the trail of user and the location service. According to receive the strength of Wi-Fi signal in an indoor environment, one can execute pattern matching and then calculate the user’s position. In this paper, we present the phone''s acceleration and the magnetic field sensors convert into the direction in the Wi-Fi environment. Through this direction information as the basis for comparison in on-line phase, and combine with the LEGO robots in the indoor off-line phase then build the automatic site survey system, thereby to reduce the time and human cost. Eventually, this thesis will focus on the shadowing effect of human body, the compensation of signal attenuation, and using the fuzzy logic clustering to improve localization accuracy.