• Title/Summary/Keyword: Lanterns

Search Result 25, Processing Time 0.035 seconds

A Optical System Design of LED Marine Lanterns Based on a TIR Collimator Lens (전반사 렌즈를 이용한 LED 등명기 광학계 설계)

  • Go, Dong Hyun;Lee, Yoon Chul
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
    • /
    • v.29 no.11
    • /
    • pp.1-5
    • /
    • 2015
  • In this paper, we propose the optical system design for a medium sized LED marine lanterns which simplifies the multi-layer structure into a single structure. In order to satisfy the target fixed intensity(35,000cd) and vertical divergence($-2.5^{\circ}{\sim}-4.0^{\circ}$, $+2.5^{\circ}{\sim}+4.0^{\circ}$), we use the total internal reflection collimator lens. And a Monte Carlo simulation has been utilized to optimize a condition of a LED package, TIR lens and outside lens. The computer simulation results indicated that this LED marine lanterns can produce of a fixed intensity(35,382cd) and vertical divergence($-3.1^{\circ}{\sim}+2.5^{\circ}$). Using the this optical system, we achieve the target value of LED lanterns.

A study on characteristic variation of solar cells for lanterns as a temperature change (정원등(lanterns)용 태양전지셀의 온도특성 변화연구)

  • Lee, Se-Hyun;Cho, Mee-Ryoung;Shin, Sang-Wuk;Hwang, Myung-Keun;Yang, Seong-Yong
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 2006.06a
    • /
    • pp.206-209
    • /
    • 2006
  • In this paper, I try to measure the electrical characteristics of PV cell for lanterns with solar simulator and simulated with PC1D software. I keep my eye on the characteristics variation of PV cell as a temperature change. Therefore, I try to increase a temperature of controlled block from $10^{\circ}C$ to $50^[\circ}C$ while measuring the FV cell. As a result, A variation caused by voltage have an effect on the efficacy of PV cell. Hence it is an important variable when a designer plan to make a solar cell for lanterns.

  • PDF

A study on characteristic variation of solar cells for lanterns as a temperature change (정원등(lanterns)용 태양전지셀의 온도특성 변화연구)

  • Lee, Se-Hyun;Park, Chang-Yong;Cho, Mee-Ryoung;Shin, Sang-Wuk;Hwang, Myung-Keun;Yang, Seong-Yong
    • Proceedings of the KIEE Conference
    • /
    • 2006.07b
    • /
    • pp.1199-1200
    • /
    • 2006
  • In this paper, I try to measure the electrical characteristics of PV cell for lanterns with solar simulator and simulated with PC1D software. I keep my eye on the characteristics variation of PV cell as a temperature change. Therefore, I try to increase a temperature of controlled block from $10^{\circ}C$ to $50^{\circ}C$ while measuring the PV cell. As a result, A variation caused by voltage have an effect on the efficacy of PV cell. Hence, it is an important variable when a designer plan to make a solar cell for lanterns.

  • PDF

A study on characteristic variation of solar cells for lanterns as a temperature change (정원등(lanterns)용 태양전지셀의 온도특성 변화연구)

  • Lee, Se-Hyun;Park, Chang-Yong;Cho, Mee-Ryoung;Shin, Sang-Wuk;Hwang, Myung-Keun;Yang, Seong-Yong
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
    • /
    • 2006.05a
    • /
    • pp.233-236
    • /
    • 2006
  • In this paper, I try to measure the electrical characteristics of PV cell for lanterns with solar simulator and simulated with PC1D software. 1 keep my eye on the characteristics variation of PV cell as a temperature change. Therefore, I try to increase a temperature of controlled block from $10^{\circ}C\;to\;50^{\circ}C$ while measuring the PV cell. As a result A variation caused by voltage have an effect on the efficacy of PV cell. Hence, it is an important variable when a designer plan to make a solar cell for lanterns.

  • PDF

Performance evaluation by simulation for the angular luminous intensity distributions of marine lanterns using a tilting aspherical Fresnel lens and a C-8 type light bulb (기울어진 비구면 프레넬 렌즈와 C-8 type 전구를 이용한 해상용 랜턴의 배광곡선 시뮬레이션을 통한 성능평가)

  • Cho Hyun Seok;Jo Jae Heung;Park Seungl Nam;Park Chul Woung;Kim Yong Wan;Kim Jong Tae
    • Korean Journal of Optics and Photonics
    • /
    • v.15 no.6
    • /
    • pp.511-518
    • /
    • 2004
  • Providing marine signal lanterns with advantages of little weight as well as large aperture, a Fresnel lens has been adopted to transfer the beam from the lanterns up to 10 nautical miles (18.53 km). A Fresnel lens with the diameter of 250 mm and 300 mm was designed by a lens design program and optimized by adjusting the groove parameters of the lens. The angular luminous intensity distribution (ALID) of this lens was calculated by using an illumination analysis program considering the ALID of a light bulb. At the best alignment of the bulb, the maximum luminous intensities (MLI) of the lantern were 1000 cd (in the case of 250 mm diameter) and 1300 cd (in the case of 300 mm diameter). These are more than the critical value of 720 cd that is the Korean Standard of MLI for the marine lantern. The ALID was investigated as a function of misalignment from the lens focus to determine the tolerance of the alignment ranges.

The Analysis of Optical Characteristics of Lanterns for Bridges in Korea (국내 교량등용 등명기 광학특성 분석)

  • Jae-Hoon Jeong;Jae-Young Ko;Ji-Min Yeo
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
    • /
    • 2021.11a
    • /
    • pp.83-84
    • /
    • 2021
  • 국내 교량등용 등명기의 최근 5년간 정기검사 현황을 통계화하였으며, 제조사별 색상별 광학특성을 조사·분석하여, 향후 교량등명기 성능 개선을 위한 기초자료로 활용하고자 한다.

  • PDF

Design and Manufacturing a Synchronous Fash of LED Marine Lantern based on GPS-based (GPS기반 동기점멸방식의 해상용 LED등명기의 설계 및 제작)

  • Byun, Gi-Sig;Kim, Gwan-Hyung;Kim, Min;Kim, Chun-Ho
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.16 no.5
    • /
    • pp.885-891
    • /
    • 2012
  • The synchronous flash of a marine lantern, differentiated from the flash pattern of other risk indicators, supports the safe sailing of vessels. General marine lanterns flash according to the flash protocol through sensing the day and the night. Thus, there can be time error over time and the marine lantern does not synchronously flash as a whole. To resolve this problem, this study designed LED marine lantern based on constant-current system using synchronous flash technique enabling all marine lanterns to keep its time based on GPS satellite time. Also we suggested a radiation method with an effective heat emission performance in the restricted and closed space of a marine lantern.

The Origin of the Square-Shaped Jangmyeongdeung of Jeongneung Royal Tomb and Its Stylistic Development -In Comparison with the Buddhist Temple Stone Lanterns- (조선 정릉(貞陵) 사각 장명등(四角長明燈) 양식의 원류와 전개 -사찰 석등과의 비교를 통해 -)

  • Kim, Ji Yeon
    • Korean Journal of Heritage: History & Science
    • /
    • v.43 no.4
    • /
    • pp.24-55
    • /
    • 2010
  • Jangmyeongdeung Lantern (貞陵長明燈) refers to the stone lantern placed in front of the royal tomb. It serves both symbolic and decorative purposes; symbolic because it is supposed to guard and illuminate the buried, and decorative because it is a work of sculpture that adorns the entire graveyard. The Jangmyeongdeung of Jeongneung was the earliest stone lantern to be produced during the Joseon period. Its square shape is unique among those from the early to mid-Joseon period. The three major parts of Jangmyeongdeung - the stand, the lantern, and the roof-shaped cover parts - are square in shape, differing from the octagonal shaped Jangmyeongdeung. The stand consists of three single stone blocks, the Hadaeseok(下臺石), Ganjuseok(竿柱石), and Sangdaeseok(上臺石). The Hwasaseok(火舍石), or the lantern part, is also a single stone block. Jangmyeongdeung of Jeongneung succeeds the style of those of Hyeon-neung and Jeongneung(玄正陵) of the Goryeo period and is of a better artistic quality. As the first Jangmyeongdeung lantern, it is a refined work of art that marks the foundation of the Joseon Kingdom. This paper tries to ascertain the stylistic origin of the square-shaped Jangmyeongdeung of Jeongneung and compare it with those of Buddhist temples. Consequently, similarities were found among the stone lanterns of Zen priests 'Jigong'(指空) and 'Nawong'(懶翁) in the Hweamsa Temple(檜巖寺) site from the late Goryeo period, those of Zen priest 'Muhak'(無學) of the Hweamsa Temple site, and those of national priest 'Bogak'(普覺) of Cheongnyongsa Temple(靑龍寺) from the early Joseon period. Primarily, this is because the three components(the stand, the lantern part, and the roof-shaped cover) are essentially square-shaped. Second, as the Ganjuseok(one of the components of the stand) became shorter, the stand took a more stable form. Third, the Hwasaseok(the lantern part) consists of two stone blocks joined together. Fourth, the roof-shaped cover is also in square in shape. Similarly, the Jangmyeongdeung of Jeongneung contains Buddhist elements as well. The three-bead pattern that decorates the Ganjuseok stand is an example. The three-bead pattern is one of the symbolic elements related to Tantric Buddhism. It is found on the diadems worn by Bodhisattvas from the Goryeo and early Joseon periods. The Jangmyeongdeung of Jeongneung in early Joseon directly influenced the production of the square-shaped stone lanterns used to decorate the tombs during the Joseon period. After the latter half of the 15th century, however, the octagonal-shaped Jangmyeongdeung style began to prevail. The Jangmyeongdeung of Jeongneung reflects the succession of the tradition of royal tombs from Goryeo to Joseon, the introduction of square-shaped stone lanterns to Buddhist temples, and the influence of the Buddhist philosophy of the time. It is a living testimony to various elements of each time and corresponding cultural trends.

The LED lamp synchronous light control and charge/discharge system by using GPS (GPS를 이용한 LED 동기점멸등 제어 및 충방전 시스템)

  • Jang, Hye-Young;Son, Young-Dae;Kim, Cherl-Jin
    • Proceedings of the KIEE Conference
    • /
    • 2007.10c
    • /
    • pp.157-159
    • /
    • 2007
  • For a vessel to safely navigate on the ocean, it is required to check the vessel position as frequently as possible. When a vessel navigates oil the ocean or entering/leaving a port, the target area such as islands, points and mountain peak, etc. are used. However, when such target are not available or when vessel navigates in night time, installed artificial navigation aid facilities help successful vessel navigation. Light Wave Aid helps to confirm a position to the navigator directly and quickly. So, the synchronous light to display the accurate signal has wide applications. However, lantern domestic industry is small, and most of the products show non-compatibility. Consequently, this paper presents the synchronous lighting using UTC of GPS, which maintains compatibility with different lanterns. Also, by replacing conventional electric bulb with LED lamp, simple and efficient lighting system is obtained.

  • PDF