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- 저자 : Gong Bo Moon (검색결과 7 건)
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An Indoor Positioning System for a First Responder in an Emergency Environment
Gong Bo Moon,Moon Beom Hur,Gyu-In Jee 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
An indoor positioning system for a first responder in an emergency environment is focused as one of the national agenda in Korea. In this area, many researches are carried out, still there left limitations of a system installation and an inconsistent positioning accuracy in the arbitrary emergency environment. This paper presents a new indoor positioning system for the first responder, especially firemen in the scene of a fire. The portability and adaptability for the emergency environment are mainly considered for a feasibility of the proposed system. With portable access points (APs), which can measure ranges to the other AP and the firemen based on IEEE 820.15.4a, in an indoor environment and a monitoring station in an outdoor environment, a control unit outside a building in fire can determine the position of the firemen and deployed APs using the Extended Kalman Filter (EKF) and the simultaneous localization and mapping (SLAM) methods. In this paper, the concept and positioning procedure of the proposed system are introduced. An experiment on ranging is done to analyze an error characteristic of measurements, then the result is applied to a simulation for the positioning system to certify the possibility of the system operation in the emergency environment. The simulation result shows that the proposed indoor positioning system can be applied to help the firemen escape from the emergency environment safely.
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Gong Bo Moon,Sebum Chun,Moon-Beom Hur,Gyu-In Jee 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
A positioning method for a first responder in an indoor emergency environment is needed to strengthen a safety for rescue operation. In Korea, it is focused as one of the national agenda. Though many researches are done in this field, but they still have limitations of system preloading and a poor positioning accuracy depending on an arbitrary situation. This paper presents a robust indoor positioning system for the first responder in the scene of fire. The proposed positioning system consists of a monitoring station outside a building, portable access points (APs), and first responders. In the first place, the first responder measure distances to other first responders and portable APs in the hearable range, and calculates its relative position utilizing the simultaneous localization and mapping (SLAM) method implemented with the Extended Kalman Filter (EKF). In this process, the position information stored in the APs and first responders can serve as a map for the others. Then the initial position guess and distance measurements are delivered to the monitoring station via ad-hoc network by portable APs and first responders to correct position estimates of those in the whole system. The monitoring station also uses EKF SLAM method with all available position estimates and distance measurements. In this paper, the system configuration and positioning method are presented, and the simulation on the positioning of the portable APs and the first responders with respect to the monitoring station is carried out to certify the feasibility of the proposed system.
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Optical Communication Method using CCR
Gong Bo Moon,Chan Gook Park,Jang Gyu Lee 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
These days, wireless sensor network, which has a base station and sensor nodes, is widely used. Sensor nodes are located at certain positions to gather the environmental information around them. Then they need to transmit measured data to base station or other sensor nodes. Currently, most of them are using RF (radio frequency) method for communication. This method has a security problem and needs extra modulator and demodulator to handle RF signals In this paper, to avoid these problems, communication method via optical channel is proposed. This method only needs light source and CCR (corner cube retro-reflector). First, it is checked whether proposed method can be implemented or not. Next, applicable procedure, which includes error detection, for optical communication is developed. Finally, experimental result is shown to verify that the proposed method works with real system.
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Position Determination Using the DTV Segment Sync Signal
Moon, Gong-Bo,Jee, Gyu-In,Lee, Jang-Gyu 제어로봇시스템학회 2011 Transaction on control, automation and systems eng Vol. No.
As a supplement to the Global Positioning System (GPS) in an urban center and indoor environment, the digital television (DTV) segment sync signal can be employed to obtain a mobile user's position. Two DTV receivers and a counter are integrated to measure the time difference of arrival (TDOA) for a pair of received signals from a transmitter and its corresponding repeater (DTVR). Using the measurements from a transmitter and its multiple corresponding DTVR pairs, the mobile user position can be estimated using the recursive least square method. An experiment done in Seoul using two low-grade high resolution digital television (HDTV) receivers and a two-channel universal counter demonstrates that the mean value of the mobile user position measurement is accurate to 42.58 meters circular error probability (CEP).
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CCR 반사경과 Manchester Coding을 이용한 광(光)통신 기법
문공보(Gong-Bo Moon),박찬국(Chan-Gook Park),이장규(Jang-Gyu Lee) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
최근 활발한 연구가 진행되고 있는 센서 네트워크 시스템은 센서 노드 주변에서 수집된 환경 정보를 베이스로 전달하여 정보를 통합하는 시스템이다. 다양한 환경에 적용하기 위하여 정보 전달에 주로 무선 채널을 활용하는데 기존과 같이 라디오 주파수 채널을 이용하는 경우 센서 노드가 복잡해지고, 도청의 위험성이 존재한다. 본 논문에서는 이러한 단점을 피하기 위해 광(光)채널을 형성하고, 이를 이용하여 데이터를 전송하는 기법을 제안한다.
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Kim, Jong-Moon,Park, Bo-Ra-Mi,Kim, Young-Rhan,Gong, Lindan,Jang, Myung-Duk,Kim, Seog-K. Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.4
The fluorescence intensity of DNA-intercalated ethidium with [ethidium]/[DNA base] being 0.005 was quenched upon the binding of another intercalating ligand, meso-tetrakis(N-methylpyridinium-4-yl)porphyrin (TMPyP). Addition of $Ca^{2+}$ enhanced the quenching efficiency. The range of separations between donor and acceptor molecules, within which total quenching occurs, was calculated using a one-dimensional resonance energy transfer mechanism to be 9.5 base-pairs or $32.3{\AA}$ in the absence of $Ca^{2+}$ ions. The distance increased to 18.7 base-pairs or about $63.6{\AA}$ in the presence $100{\mu}M$ $Ca^{2+}$. Considering that (1) $Ca^{2+}$ had little effect on the binding modes of ethidium and TMPyP, which was investigated by reduced linear dichroism and (2) spectral overlap between the emission spectrum of ethidium and the absorption spectrum of TMPyP was maintained in the presence of $Ca^{2+}$, contributions from orientation factor and spectral overlap to $Ca^{2+}$-induced enhancement in DNA mediated energy transfer was limited. Although there is no direct evidence, electron transfer along the DNA stem may accompany the observed fluorescence quenching. In this respect, DNA bound $Ca^{2+}$ act as a partially conducting medium.
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