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http://dx.doi.org/10.5302/J.ICROS.2006.12.9.876

A Study on the Application of U-SAT System for the Indoor Positioning Technology of Ubiquitous Computing  

Lee, Dong-Hwal (부산대학교 기계공학과)
Park, Jong-Jin (숭실대학교 컴퓨터학과)
Kim, Su-Yong (부산대학교 기계공학과)
Mun, Young-Song (숭실대학교 컴퓨터학부)
Lee, Man-Hyung (부산대학교 기계공학과)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.12, no.9, 2006 , pp. 876-882 More about this Journal
Abstract
This study presents an ultrasonic location awareness system for the ubiquitous computing with absolute position. The flight time of ultrasonic waves is determined by a period detecting technique which is able to extend the sensing range compared with traditional methods. For location awareness, ultrasonic waves are sent successively from each ultrasonic transmitter and synchronized by radio frequency (RF) signal, where the transmitting part is fixed and the receiving part is movable. To expand the recognizing range, cell matching technique and coded ultrasonic technique are introduced. The experimentation for various distances is accomplished to verify the used period detecting technique of U-SAT system. The positioning accuracy by using cell matching is also verified by finding the locations of settled points and the usability of coded ultrasonic technique is verified. As a result, the possibility of ultrasonic location awareness system for the ubiquitous computing can be discussed as a pseudo-satellite system with low cost, a high update rate, and relatively high precision, in the places where CPS is not available.
Keywords
ubiquitous computing; indoor positioning; location awareness; ultrasonic; LBS;
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Times Cited By KSCI : 1  (Citation Analysis)
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