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원거리 전기 자동차의 다중 충전을 위한 레이저 파워 빔 기반의 무선 전력 전송 시스템
엄정숙,김건정,최정희,박용완,Eom, Jeongsook,Kim, Gunzung,Choi, Jeonghee,Park, Yongwan 대한임베디드공학회 2016 대한임베디드공학회논문지 Vol.11 No.6
This paper presents the design and simulation of a laser power beaming (LPB) system for an electric vehicle that establishes an optimal power transmission path based on the received signal strength. The LPB system is possible to transfer power from multiple transmitters to a single receiver according to the characteristics of the laser and the solar panel. When the laser beams of multiple transmitters aim at a solar panel at the same time, the received power is the sum of all energy at a solar panel. Our proposed LPB system consists of multiple transmitters and multiple receivers. The transmitter sends its power characteristics as optically coded pulses with a class 1 laser beam and powers as a high-intensity laser beam. By using the attenuated power level, the receiver can estimate the maximum receivable powers from the transmitters and select optimal transmitters. Throughout the simulation, we verified the possibility that different LPB receivers were achieved their required power by the optimal allocation of the transmitter among the various transmitters.
Establishing Best Power Transmission Path using Receiver Based on the Received Signal Strength
엄정숙,손희동,박용완 한국인터넷정보학회 2017 인터넷정보학회논문지 Vol.18 No.6
Wireless power transmission (WPT) for wireless charging is currently attracting much attention as a promising approach to miniaturize batteries and increase the maximum total range of an electric vehicle. The main advantage of the laser power beam (LPB) approach is its high power transmission efficiency (PTE) over long distance. In this paper, we present the design of a laser power beam based WPT system, which has a best WPT channel selection technique at the receiver end when multiple power transmitters and single power receiver are operated simultaneously. The transmitters send their transmission channel information via optically modulated laser pulses. The receiver uses the received signal strength indicator and digitized data to choose an optimum power transmission path. We modeled a vertical multi-junction photovoltaic cell array, and conducted an experiment and simulation to test the feasibility of this system. From the experimental result, the standard deviation between the mathematical model and the measured values of normalized energy distribution is 0.0052. The error between the mathematical model and measured values are acceptable, thus the validity of the model is verified.
동시송출라이다에서 상호 간섭을 제거 방법과 그 효과에 관한 연구
엄정숙(Jeongsook Eom),김건정(Gunzung Kim),박용완(Yongwan Park) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
본 논문은 동시 송출 라이다에서 상호 간섭의 원인인 외부 신호 유입을 제거하는 방법과 그 효과에 관한 것이다. 자동차에 장착한 라이다가 실제 도로 환경에서 다른 라이다로 인하여 발생하는 상호 간섭 발생을 시뮬레이션을 통하여 재연하고 분석하였다. 동일한 실제 도로 환경에서 동시 송출 라이다의 외부 신호 유입 제거 기능이 상호 간섭을 효과적으로 제거함을 시뮬레이션을 통하여 재연하였다.