UAV flight and landing guidance system for emergency situations

Joon Yeop Lee, Albert Y. Chung, Hooyeop Shim, Changhwan Joe, Seongjoon Park, Hwangnam Kim

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Unmanned aerial vehicles (UAVs) with high mobility can perform various roles such as delivering goods, collecting information, recording videos and more. However, there are many elements in the city that disturb the flight of the UAVs, such as various obstacles and urban canyons which can cause a multi-path effect of GPS signals, which degrades the accuracy of GPS-based localization. In order to empower the safety of the UAVs flying in urban areas, UAVs should be guided to a safe area even in a GPS-denied or network-disconnected environment. Also, UAVs must be able to avoid obstacles while landing in an urban area. For this purpose, we present the UAV detour system for operating UAV in an urban area. The UAV detour system includes a highly reliable laser guidance system to guide the UAVs to a point where they can land, and optical flow magnitude map to avoid obstacles for a safe landing.

Original languageEnglish
Article number4468
JournalSensors (Switzerland)
Issue number20
Publication statusPublished - 2019 Oct 2


  • Emergency landing
  • Laser guidance
  • Optical flow
  • Particle filter
  • UAV

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Electrical and Electronic Engineering


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