Outer Wall Inspection by Noncontact Acoustic Inspection Method using Sound Source Mounted Type UAV
* Presenting author
By using the noncontact acoustic inspection method that utilizes flexural resonance generated by acoustic irradiation induced vibration, crack defect existing near the surface of the measurement target can be non-destructively inspected from a long distance. It has been proved that the same test as the hammering test can be done with tunnels and bridges with a height of over 30 m and shotcrete with a rough surface.This method has problems such as environmental noise and angle dependency. However, when a sound source itself is mounted on an unmanned aerial vehicle (UAV) which is becoming popular in recent years, it becomes possible to make the sound source position directly face the measurement target surface, and these problems are expected to be resolved.Therefore, we investigated outer wall inspection by noncontact acoustic inspection method using sound source mounted type UAV. The inspection results using the outer wall specimen were good, and it became clear that peel defects of the tile can be detected even with a small sound source that can be mounted on UAV.