A Study on Feasibility of Method Using High-Intensity Aerial Ultrasonic Waves for Detection of Foreign Substance Inside Soft Material

In this research, we have studied about the noncontact measurement method for detecting foreign substance inside soft material by using high-intensity aerial ultrasonic waves (frequency: 28 kHz). For practical application of the method, it is necessary to clarify the effect on measurement results which are caused by ultrasonic intensity, an angle of ultrasonic irradiation and surface properties of soft material. In this paper, we investigated imaging precision of foreign substance inside soft material by the proposed method when irradiation angle was changed.