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A study of ubiquitous-RTLS system for worker safety
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 Title & Authors
A study of ubiquitous-RTLS system for worker safety
Kim, Young-Baig;
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 Abstract
At the industrial work site, the manufacturing process is being automated to improve work efficiency. However, it is often difficult to automate the entire manufacturing process, and there are spaces in which workers there are constantly exposed to danger. To protect such workers from the danger, this paper studied a worker safety management system for the industrial work site which uses a location recognition system and which is based on the Ubiquitous-Wireless Sensor Network (U-WSN). Using wireless signals, the distance between two devices can be measured and the location of a worker can be calculated using triangularization in 3-D. But at the industrial work sites where there are a lot of steel and structures, errors occur due to signal reflection and multi-path, etc., which makes it difficult to get the accurate location. To address this problem the following was done: first, a circular polarization patch antenna appropriate to the work site was used to reduce the degree of error that may occur from the antenna emission pattern and the particular Line of Sight (LOS); second, a 3-D localization technique and a filtering algorithm were used to improve the accuracy of location determination. The developed system was tested by using it on a wharf crane to validate its accuracy and effectiveness. The proposed location recognition system is expected to contribute greatly in ensuring the safety of workers at industrial work sites.
 Keywords
RTLS(Real Time Location System);CSS(Chirp Spread Spectrum);Circular Polarization Antenna;3-Dimensional;Filtering Algorism;Safety Management;
 Language
Korean
 Cited by
 References
1.
김학용, 김성덕, 서동길, 지정강, 장현태"근거리 위치 추적 동향", IITA 주간 기술동향 , 2007.11.14, pp.1-12

2.
이성호, 민경욱, 김재철, 김주완, 박종현"위치기반 서비스 기술 동향,"ETRI 정보통신 동향분석, 2005. 6, pp. 33-42

3.
명승일, 모상현, 이형섭, 박형래, 서동선, "다중 경로 환경에서 실시간 위추적 시스템의 위치 오차 분석", 전기전자학회 논문지, Vol. 14. NO.1

4.
이광표, 이현수, 박문서, 김현수, 백윤주,"건설 안전관리를 위한 실시간 위치추적(RTLS) 기술 개발", 한국건설관리학회 논문집 제11권 제2호, 2010

5.
TimeDomain, http://www.timedomain.com

6.
Nanotron Technology, http://www.nanotron.com

7.
Joseph L. Awange, Erik W. Grafarend, Yoichi Fukuda, and Shuzo Takemoto,"Direct polynomial approach to nonlinear distance (ranging) problems,"Earth Planets Space, 55, 231-41, 2003 crossref(new window)

8.
이사원, 송우영,"UHF RFID 시스템을 위한 Polarization selective 안테나 연구," 한국컴퓨터정보학회 논문지, 제15권 제7호, pp.67-74, 2010

9.
김성필, MATLAB 활용 칼만필터의 이해, 아진, 2010