• Journal of Navigation and Port Research
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• v.28 no.8
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• pp.667-671
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• 2004

This paper describes an development of digital power supply for ship's emergency lighting system(SELS). Proposed system is composed of emergency power supply system(EPSS), half bridge(HB) inverter, fluorescent lamp(FL) starting circuit and microprocessor control system. Experimental works using proposed system confirm that speedy and stable power to be supplied when main power source cut-off, compared with conventional analog type, and control input power up to 35.0［%］ by adjusting pulse frequency of the HB inverter.

• Journal of The Korean Society For Urban Railway
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• v.6 no.4
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• pp.299-307
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• 2018

Automatic announcement systems and emergency lights are necessary to prevent urban railway vehicles from accident, according to the emergency response guideline of domestic railroad. When emergency situation occurs, safety regulations and standards for urban railway vehicles specify that the emergency lights must be turn-on over 30 minutes as well as that the announcement should be provided by an attendant. However, as the current emergency systems use different units without a standard and system maintenance and management is not well performed, it is difficult to know the operation status. In this paper, modularized structures are given to standardize the emergency systems. The modularized structures analyzed from emergency scenarios of railway can substitute the existing broadcasting and lighting system. As a result, the optimized modular system considering cost and maintenance can be proposed by comparing all modularizations.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.3
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• pp.495-502
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• 2020

In this paper, a power management circuit was designed to drive the emergency lighting LED in the underground facility for public utilities using magnetic energy harvest. The magnetic energy harvest consists of a harvest elements and power management circuits. The proposed circuit was made of a rectifier, a battery charging circuit, and an LED driving circuit. In normal times, the battery is charged with the harvested power, and in the event of an emergency, the energy stored in the battery is used to drive the LED. As a result of the measurement, it took two minutes to charge the 47 mF capacitor. This is the amount of power that can drive an LED for emergency lighting for about three and a half minutes. Through this, it was confirmed that the power management circuit for magnetic energy harvest proposed in this paper can be used as an emergency lighting LED-driven power device in an underground facility for public utilities where it is difficult to draw separate power.

• 방재와보험
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• s.107
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• pp.45-51
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• 2005

초고층 또는 대형.다중이용 건축물에서 화재 등 재해발생시 대형참사를 예방하기 위하여 대규모 관람장, 지하철역사 등의 바닥면에 설치하는 피난유도표시 설치가 주목 받고 있다. 화염으로 인해 조명과 피난표지의 식별이 곤란하게 되는 경우 피난유도표지는 피난경로를 지속적으로 확인할 수 있는 수단이기 때문이다. 특히 지난 9.11 세계무역센터 테러 당시 , 공포와 암흑 천지의 상황에서 빌딩 내에 설치되어 있던 피난유도표지는 많은 인명을 구하는데 크게 기여하기도 하였다. 축광 피난구 표지는 빛을 축적해 배터리 등의 전기적인 요소로 작동하는 비상조명과 달리 주위환경에 상관없이 작동할 수 있어 유지관리 측면에서 비상조명의 문제점을 보완할 수 있다. 더욱이 피난경로를 따라 이동할 수 있어 피난자가 얻는 심리적 이익도 함께 얻을 수 있는 잇점으로 전망 또한 매우 밝다.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.5
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• pp.10-13
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• 1997

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.11 no.5
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• pp.17-27
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• 1997

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.2 no.1
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• pp.53-55
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• 1988

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.1
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• pp.43-49
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• 2014

• Journal of Navigation and Port Research
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• v.29 no.10 s.106
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• pp.859-863
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• 2005

This paper describes the improvement of power control characteristics of ship's emergency lighting power supply(SELPS), by which electric power is controlled extensively, and power ON-OFF is controlled and system parameter monitored in remote distance by PC serial communication. Proposed system is composed of step-down converter(SDC), emergency power supply circuit(EPSC), half bridge(HB) inverter, fluorescent lamp(FL) starting circuit, microprocessor control and multi communication circuit. Experimental works confirm that relative system stops when over current is detected and speedy and stable emergency power is supplied when main power source cut-off, and controls input power up to 35[$\%$] by adjusting pulse frequency of the HB inverter, and ON-OFF control of multiple SELS, real time transmission and monitor of parameters as to voltage, current, and power values are performed appropriately by PC communication.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.28 no.2
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• pp.16-23
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• 2014