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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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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.
RTLS(Real Time Location System);CSS(Chirp Spread Spectrum);Circular Polarization Antenna;3-Dimensional;Filtering Algorism;Safety Management;
 Cited by
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명승일, 모상현, 이형섭, 박형래, 서동선, "다중 경로 환경에서 실시간 위추적 시스템의 위치 오차 분석", 전기전자학회 논문지, Vol. 14. NO.1

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


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