유비쿼터스 컴퓨팅의 실내 측위 기술을 위한U-SAT 시스템의 적용에 관한 연구A Study on the Application of U-SAT System for the IndoorPositioning Technology of Ubiquitous Computing
- Other Titles
- A Study on the Application of U-SAT System for the IndoorPositioning Technology of Ubiquitous Computing
- Authors
- 이동활; 박종진; 김수용; 문영성; 이만형
- Issue Date
- Sep-2006
- Publisher
- 제어·로봇·시스템학회
- Keywords
- ubiquitous computing; indoor positioning; location awareness; ultrasonic; LBS; ubiquitous computing; indoor positioning; location awareness; ultrasonic; LBS
- Citation
- 제어.로봇.시스템학회 논문지, v.12, no.9, pp.876 - 882
- Journal Title
- 제어.로봇.시스템학회 논문지
- Volume
- 12
- Number
- 9
- Start Page
- 876
- End Page
- 882
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/19077
- ISSN
- 1976-5622
- 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 GPS is not available.
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