• KIEAE Journal
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• 제14권4호
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• pp.27-33
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• 2014

This study analyzed the electric vehicle recharging station status with recharging time limitation due to long waiting time, and figured out the user status by user interviews. And then this study verified the validity of hypothesis in terms of environmental design perspective and suggested layout of recharging station model. 21 recharging stations in Korea and station operation cases of 7 countries were examined. Except for the USA, the reality of electric vehicle recharging station today is the 1st proving stage focusing on the infrastructure construction of electric vehicle recharging station. It focuses on performance of recharging facility, use efficiency and operation environment of electric vehicle. About the effective waiting time of the user to use it should be studied. The current conditions of recharging station are as follows: Lack of independent recharging space, lack of facility that reduces external effect of recharging space, and lack of lounge for users during the waiting time. These three are essential factors constructing a suggesting model after basic layout, which needs proper measurement on the long recharging time and long waiting time. The essential factors are applied to electric vehicle recharging station layout so that users might use 'digital refresh" i.e. lounge and information contents service during the waiting time which provides convenience of recharging and emotional space with users. Such upgrade recharging station environmental model might resolve the burden of long recharging time which may contribute to the popularization of electric vehicles.

• 로봇학회논문지
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• 제2권4호
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• pp.289-296
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• 2007

The docking and recharging system for a mobile robot must guarantee the ability of the mobile robot to perform its tasks continuously without human intervention. In this paper, two docking mechanisms are proposed with localization error-compensation capability for the auto recharging system. Friction forces or magnetic forces are used between the docking parts of the docking module and those of the docking station. In addition, an auto recharging system is developed to control the power. Since the system is modularized, it can easily be adapted to other robots.

• 전기학회논문지
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• 제63권9호
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• pp.1306-1311
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• 2014

In this paper, effect of recharging power by using ESS(Energy Storage System) was investigated when ESS was applied to the train. The recharging power was analyzed and measured. Also, by applying ALVT algorithm, effective recharging and discharging were studied. By using this process, recharging and discharging of the super capacitor were improved which led to enhancing the use of recharging power from the urban Railway vehicles.

• International Journal of Control, Automation, and Systems
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• 제6권5호
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• pp.731-739
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• 2008

The docking and recharging system for a mobile robot must guarantee the ability to perform its tasks continuously without human intervention. This paper proposes two docking mechanisms with localization error-compensation capability for an auto recharging system. The mechanisms use friction forces or magnetic forces between the docking parts of the robot and those of the docking station. It is a structure to improve the allowance ranges of lateral and directional docking offsets, in which the robot is able to dock into the docking station. In this paper, auto-recharging system and the features of the proposed mechanisms are verified with experimental results using simple homing method.

• 구강회복응용과학지
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• 제21권1호
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• pp.25-32
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• 2005

The purpose of this study was to examine an effect of fluoride recharging on fluoride release and surface change of fluoride-releasing restorative materials. Six commercially available fluoride releasing restorative materials (Fuji II LC Improved: FL, Compoglass F: CF, Dyract AP: DA, F2000: FT, Gradia Direct: GD, and Tetric Ceram: TC) were selected as experimental materials. Disk specimens were fabricated with split teflon mold to the final dimensions of 15 mm in diameter and 1 mm in thickness. Ten samples of each material were fabricated and stored in deionized water at $37^{\circ}C{\pm}1^{\circ}C$ for 3 months. Before fluoride recharging, all specimens were polished sequentially from #800 to #2000 emery papers. Fluoride recharging was done at 5-day interval using 2.0% NaF gel. The release of fluoride into the storage water was monitored using a fluoride ion electrode. Data were analyzed by one-way ANOVA and Tukey's multiple range test. The results obtained were summarized as follows; 1. Fluoride recharge capability were FL > CF > DA and TC group after 12 times exposure to 2.0% NaF gel (P<0.05). 2. All the experimental materials, except for FT group, showed the increase of fluoride release and surface roughness. 3. Fluoride-releasing rates returned to base line within 3 days.

• 한국수자원학회논문집
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• 제37권2호
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• pp.97-108
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• 2004

최근 들어 도서지역이나 해안지역의 제한된 수자원을 보다 효과적으로 사용하기 위하여 지하댐을 이용한 지하수자원 개발 방안이 제시되고 있다. 그러나 해안선에 인접한 지하댐의 경우 과도한 지하수 양수는 대수층의 지하수위를 저하시켜 결국 염수침입이라는 심각한 문제를 발생시키게 된다. 염수침입은 대수층의 지하수위 하강에 기인하므로 본 연구에서는 지하댐 하류에 함양정(Recharging well)을 설치하여 대수층의 지하수위를 상승시킴에 따른 염수침입 저감효과를 분석하였다. 이 방안을 쌍천유역에 적용하였으며, 이를 위해 염분의 이송ㆍ확산을 분석할 수 있는 SUTRA(Saturated-Unsaturated Transport) 수치모형을 적용하였다. 그 결과 지하댐 하류지역에 대한 함양기법이 양수정 염분 저하에 매우 효율적인 방법임이 증명되었고, 염해저감을 위한 함양정 운영시 차수벽으로부터 40∼60m거리에 함양정을 설치하고 함양률을 총 양수량의 6∼7％정도로 하여 운영을 할 때 가장 효율적으로 염해를 저감시킬 수 있다는 결론을 얻을 수 있었다.

• International Journal of Aeronautical and Space Sciences
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• 제18권3호
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• pp.588-600
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• 2017

We develop a wireless, contact free power transfer mechanism that is safer than the direct metallic contact and robust to imperfect alignment on landing at the base station. A magnetic field is created using inductors on both the transmitting and receiving sides. We use the inductive wireless recharging to increase autonomy and decrease the sensor interference by reducing the inductor loop size. By locating four independent small receiver loops and corresponding four circuits around the quadrotor UAV, we can increase safety from circuit malfunctions in comparison to the use of just one loop. On the base station, four folding robotic bars are used to realign the receiver loops over the transmitter loops. After adequate recharging as measured by battery voltages or power consumption at the bae station, the UAV sends a signal to the base station to open the robotic bars and takes off once freed from the robotic bars.

• 지질공학
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• 제14권4호
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• pp.391-400
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• 2004

강변여과수의 과도한 취수는 제내지 지하수위 하강을 발생하게 하며 이로 인해서 제내지 농경지의 토양 건조도가 증가되어 과도한 관계용수의 보충이 필요할 뿐만 아니라 지하수위 하강으로 인한 기존 관정사용이 어려워져 더 깊은 새로운 관정을 개발해야만 한다. 본 연구에서는 지하수위 하강을 저감시키기 위한 방안으로 제내지 측에 인공함양우물을 설치하는 방법을 제안하였다. 창원시 강변여과 시설에 적용한 결과 인공함양우물의 최적 위치는 취수정으로부터 제내지 측으로 200m 지점에 위치하며, 함양량을 취수량의 $5\%$를 유지하는 것이 지하수위하강을 저감하기위한 효과적인 조건으로 판단되었다.

• 센서학회지
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• 제14권2호
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• pp.78-84
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• 2005

A contactless recharging device for totally implantable middle ear systems has been designed as a pillow type that the user can recharge the implanted battery with taking a rest. The proposed device uses the electromagnetic coupling between the transmitting coil and the receiving coil. To supply sufficient power for the implanted circuits, each coil uses LC resonance and the implanted device uses voltage doubler. A power MOSFET is used for switching the DC voltage of LC parallel circuit and the switching frequency demands on a programmable frequency generator which is controlled by microcontroller. In order to improve the electromagnetic coupling efficiency at specific positions of coil which may vary with the displacement of head, the optimal location of receiving coil was studied, and the 5 transmitting coils in a pillow for recharging the implant module was designed. From such a recharging experiment, it was found that the proposed device could provide the sufficient operating voltage within the distance of 4 cm between pillow and the implanted device.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.855-858
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• 2003

The trends of recent developed a pet robot which interacts with people are increased gradually. There are a few pet robots that are a robot dog, robot cat, and robot fish. The pet robot is featured that it is possible to sympathize and give pleasure to human. The pet robots express delight, sorrow, surprise, and hunger through the artificial intelligence. Previously, the pet robot has to exchange the battery when it is exhausted. Commercialized robots have a self-recharging function, which express hunger. Robot dog AIBO, SONY in Japan, checks the battery for expressing hunger. They find an energy station for recharge. While operation time of AIBO is 1 hour 30 minutes, recharging time is 2 hours. Recharging time is longer than operation time. During the recharge, they don't operate. We obtain a motivation for eating the battery when find the problem. In this paper, introduce an Autonomous Eating Pet Robot and propose a design for realization. The Autonomous Eating Pet Robot has a function that is the most basic instinct that is finding a food and evacuating.