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WLAN 기반 실내 위치 측위에서 측위 정확도 향상을 위한 데이터 구축 방법
송진우,허수정,박용완,유국열,Song, Jin-Woo,Hur, Soo-Jung,Park, Yong-Wan,Yoo, Kook-Yeol 대한임베디드공학회 2012 대한임베디드공학회논문지 Vol.7 No.2
In this paper, we proposed Wireless LAN (WLAN) localization method that enhances database construction based on weighting factor and analyse the characteristic of the WLAN received signals. The weighting factor plays a key role as it determines the importance of Received Signal Strength Indication (RSSI) value from number of received signals (frequency). The fingerprint method is the most widely used method in WLAN-based positioning methods because it has high location accuracy compare to other indoor positioning methods. The fingerprint method has different location accuracies which depend on training phase and positioning phase. In training phase, intensity of RSSI is measured under the various. Conventional systems adapt average of RSSI samples in a database construction, which is not quite accurate due to variety of RSSI samples. In this paper, we analyse WLAN RSSI characteristic from anechoic chamber test, and analyze the causes of various distributions of RSSI and its influence on location accuracy in indoor environments. In addition, we proposed enhanced weighting factor algorithm for accurate database construction and compare location accuracy of proposed algorithm with conventional algorithm by computer simulations and tests.
건설 프로젝트에서 D-virus가 안전에 미치는 영향에 관한 기초적 연구
송진우,표영민,진유나,이상범,김정길 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2
Construction site has contributed to construction productivity improvement by utilizing information, simplification, and standardization concept. Also it has contributed to quality and productivity improvement by standardizing design and construction process, using them to a fair decision-making process by organizing diverse data in construction process. However, construction process has diverse variables and uncertain case due to particularity in construction. These parts have an effect on construction process. To use unorganic construction information and knowledge properly has become the factor to project success. Therefore, this study analyzes that D-virus of the uneasy factors has an effect on safety control of construction industry. That is to say, aim of the study is to suggest the solution to remove those after confirming for these factors to have certain effect in construction process through fact finding survey and retesting the factors of D-virus to refer in business management in a constructive position.