• 한국해안해양공학회지
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• 제3권4호
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• pp.255-260
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• 1991

차동증폭과 A/D(analog-to-digital) 변환 회로를 마이크로프로세서(microprocessor)로 작동되는 데이타로거(data logger)에 연결하여 부산-하마다간의 해저케이블 전압변동을 기록하는 장치를 개발하였다. 이 장치는 저가격, 소형, 저전력소모가 특징이며 계기의 전압드리프트(drift)가 정밀수정되고, 무인자동으로 다량의 자료저장과 모뎀(modem)에 의한 자료전달이 가능하다. 케이블 전압 및 전류 이외에 실내온도와 수은전지 전압을 측정하는데, 이는 온도영향에 따른 오차보정과 장기관 계기안정도를 확인하기 위한 것이다. 이 계기에 의한 관측자료에 의하면 부산해저중계국에서의 전압신호는, 약 0.2 볼트의 일정한 폭의 높은 주파수의 잡음대로 이루어져 있는데, 조석과 비슷한 느린 주기로 약 1볼트 범위내에서 변동한다. 또한, 케이블 전원공급장치는 실내온도가 빠르게 변할 때 많은 영향을 받는 것으로 나타났다.

• 한국수소및신에너지학회논문집
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• 제26권3호
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• pp.241-246
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• 2015

The interest of New Renewable Energy is increasing globally because of the increment of the uncertainty for the energy's supply and demand, and the increment of the frequency in weather anomaly and its damages. One of the New Renewable Energies, Hydrogen receives attention as the future energy that can deal with global environment regulation. Fuel Cell Electric Vehicle (FCEV) is an environment-friendly vehicle that uses Hydrogen as fuel. The electric power for FCEV is generated by chemical reaction with Oxygen from the air and Hydrogen. Hyundai Motor Company (HMC) has developed a proprietary fuel cell system since 2005. In 2012, HMC is the first car maker that mass-produces the ix35 FCEV to the worldwide such as North America, Europe, etc. In order to develop and improve the FCEV technology, data acquisition and analysis of the driving vehicle information is essential. Therefore, the monitoring system is developed, which is consist of datalogger, Automatic Vehicle Location (AVL) server and main server. Especially, WCDMA technology is integrated into the system which enables the data analysis without any restriction of time and region. The main function of the system is the analysis of the driving pattern and the component durability, and the safety monitoring. As a result, ix35 FCEV has successfully developed by using the developed monitoring system. The system is going to take an advantage of development in the future FCEV technology.