非破壊試験法(4)／評価試験方法(1)

[V-396] Fundamental study for shallow underground exploration technology by acoustic irradiation induced vibration from UAV

〇Tsuneyoshi Sugimoto¹, Yutaka Nakagawa¹, Isuki Uechi¹, Kazuko Sugimoto¹, Noriyuki Utagawa², Chitose Kuroda² (1.Toin Univ. of Yokohama, 2.SatoKogyo Co., Ltd.)

Keywords:Shallow underground exploration, Noncontact acoustic inspection, Unmanned aerial vehicle, Acoustic irradiation induced vibration, Scanning laser Doppler vibrometer

In the noncontact acoustic inspection method using acoustic irradiation induced vibration and LDV, there is a possibility that remote shallow underground exploration can be performed by using acoustic irradiation induced vibration from UAV. In this study, we conducted a basic study for this technology by acoustic irradiation from UAV. In the experiment, a flat speaker was placed on a fixed base, and the vibration velocity distribution was measured using LDV. Experimental results show that the detection frequency is inversely proportional to the size of the buried object, and that the detection frequency does not change at a depth of 10 mm or more.