TY  - JOUR
T1  - Efficient Distance Measurement Using QR Code for Precise Positioning of VTOL UAVs
AU  - Kim, Byoung-Kug 
AU  - Kang, Jiheon 
JO  - The Journal of Korean Institute of Communications and Information Sciences
PY  - 2024
DA  - 2024/1/1
DO  - 10.7840/kics.2024.49.5.782
KW  - Distance Determination
KW  - Drone
KW  - Positioning
KW  - QR Code Recognition
KW  - VTOL
AB  - Depending on the utilization of VTOL UAVs; there are applications that require highly sophisticated positionings. For example, precise landing at the destination is very important for automated payload (un-)loading, docking, or wired/wireless charging. Although many UAVs are equipped with GPS, a gyroscope and altitude (atmospheric and/or ultrasonic based) sensors for their location determinations, there is still an error of several meters to tens of centimetres. In case of a UAVs that applies with a magnetic induction for wireless charging system, only a few centimetres of error are allowed. In this study, we use QR code image analysis to get distance so that UAV's position could be more precisely estimated.