Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Development of lidar detection system for improvement of measurement range (Combined photon counting detection and analog-to-digital signal)

라이다 측정 거리 향상을 위한 통합 수신 시스템 개발 (아날로그방식과 광자계수방식 신호 접합)

  • Shin, Dong Ho (School of Environmental Science & Engineering, Gwangju Institute of Science and Technology (GIST)) ;
  • Noh, Young Min (School of Environmental Science & Engineering, Gwangju Institute of Science and Technology (GIST)) ;
  • Shin, Sung Kyun (School of Environmental Science & Engineering, Gwangju Institute of Science and Technology (GIST)) ;
  • Kim, Young J. (School of Environmental Science & Engineering, Gwangju Institute of Science and Technology (GIST))
  • 신동호 (광주과학기술원 환경공학부) ;
  • 노영민 (광주과학기술원 환경공학부) ;
  • 신성균 (광주과학기술원 환경공학부) ;
  • 김영준 (광주과학기술원 환경공학부)
  • Received : 2014.02.27
  • Accepted : 2014.03.13
  • Published : 2014.04.30
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Abstract

We upgraded to utilize a novel method for combining the analog to digital converter and photon-counting measurements for backscatter photon signal of lidar. We have and improve the standard combining method for determination of those conversion factors between analog to digital converter data and photon-counting data measurement which is conducted dead time correction. The combining method and dead time correction method presented here has been successfully applied to experimental data obtained in Gwangju, Korea.

본 연구는 에어로졸의 광학적 특성 분석을 위한 라이다 시스템의 정확성 향상을 위해 새롭게 개발한 신호 수신 시스템을 설명하고자 한다. 광주과학기술원의 라이다에 아날로그 방식과 광자계수 방식을 통합한 시스템을 활용하여 에어로졸 후방산란 신호를 동시에 관측 가능한 수신단을 개발하였다. 관측된 두 신호 결합을 위해 접합 알고리즘을 고안하였고, 신호 결합에 앞서 광자계수 방식 신호의 Pile up효과를 보정하기 위해 부동시간(Dead time)을 계산하여 보정하였다. 관측 신호 분석을 통해 아날로그 방식 신호, 광자계수 방식 신호, 접합신호 그리고 부동시간 보정에 따른 차이점을 설명하고, 최종적으로 에어로졸 후방산란계수를 산출하여 상호 비교 및 정확성 향상을 확인하였다.

Keywords

References

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