Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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Development of an AVR MCU-based Solar Tracker

AVR 마이크로 컨트롤러 기반의 태양추적 장치 개발

  • Oh, Seung-Jin (Department of Nuclear and Energy Engineering, Jeju National University) ;
  • Lee, Yoon-Joon (Department of Nuclear and Energy Engineering, Jeju National University) ;
  • Kim, Nam-Jin (Department of Nuclear and Energy Engineering, Jeju National University) ;
  • Hyun, Joon-Ho (Department of Nuclear and Energy Engineering, Jeju National University) ;
  • Lim, Sang-Hoon (Korea Institute of Energy Research) ;
  • Chun, Won-Gee (Department of Nuclear and Energy Engineering, Jeju National University)
  • Received : 2011.07.25
  • Accepted : 2011.12.16
  • Published : 2011.12.31
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Abstract

An embedded two-axis solar tracking system was developed by using AVR micro controller for enhancing solar energy utilization. The system consists of an Atmega128 micro controller, two step motors, two step drive modules, CdS sensors, GPS module and other accessories needed for functional stability. This system is controlled by both an astronomical method and an optical method. Initial operation is performed by the result from the astronomical method, which is followed by the fine controlled operation using the signals from Cds sensors. The GPS sensor generates UTC, longitude and latitude data where the solar tracker is installed. A database of solar altitude, azimuth, and sunrise and sunset times is provided by UART (Universal Asynchronous Receiver/Transmitter).

본 연구에서는 AVR 마이크로 컨트롤러를 사용하여 임베디드 태양추적장치를 개발하였다. 본 시스템은 Atmega128 마이크로 컨트롤러, 스텝 모터, 스텝 드라이브 모듈, CdS 센서 그리고 GPS 모듈 및 기타 부품들로 구성되어 있다. 태양추적장치는 광학적 방법과 천문학적인 방법에 의해 작동된다. 최초 태양추적은 천문학적인 계산방법에 의해 얻어진 결과에 따라 이루어지고 CdS에 의해 미세 조정이 이루어진다. 태양추적장치가 설치된 지점에서 GPS는 UTC(Universal Time Coordinated)와 위도 및 경도 데이터를 마이크로 컨트롤러에 전송한다. 전송되어진 데이터에 의해 실시간으로 태양위치, 일출 및 일몰시간이 계산되어 진다. 태양 추적에 필요한 데이터들은 범용 비동기화 송수신기(UART)를 통하여 컴퓨터로 전송 받을 수 있다.

Keywords

References

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