Efficiency Improvement of Outer Wall Inspection by Noncontact Acoustic Inspection Method using Sound Source Mounted Type UAV

We are verifying the applicability to the inspection of tile outer walls using sound source mounted type UAV (Unmanned Aerial Vehicle). In the previous study, it was clarified that defects can be detected even with a small planar sound source that can be mounted on a UAV. However, at a flight altitude of around 2m, the aircraft was found to be slightly unstable due to the wind generated by the large UAV itself. Therefore, this time, the flight altitude was set to about 4m by arranging the outer wall tile specimen itself on another concrete specimen. It was examined whether or not the defect could be detected by acoustic irradiation from UAV in flight. The effectiveness of the proposed method was confirmed from the verification experiment results.