トウ　リヨウ   Ryo TOH   陶　良    所属   千葉工業大学  工学部 電気電子工学科    千葉工業大学  工学研究科 工学専攻    千葉工業大学  工学研究科 電気電子工学専攻    職種   教授
言語種別	英語
発行・発表の年月	2013/06
形態種別	学術雑誌
査読	査読あり
標題	A study on the effect of sound velocity estimation for underground imaging
執筆形態	共著
掲載誌名	POMA (Proceedings of Meetings on Acoustics)
出版社・発行元	Acoustical Society of America
巻・号・頁	19
著者・共著者	Ryo Toh, Takuya Sakuma, Seiichi Motooka
概要	An efficient technique for detecting objects buried underground is expected. A three dimensional underground imaging method by using an amplitude correlation synthesis processing and an electromagnetic induction type sound source has been proposed. Because the sound velocity of sand and soil depends on a lot of physical parameters that varies with the area, it is needed to be measured before imaging processing. In order to improve the efficiency of field detection, a method of estimating the underground sound velocity by the sound velocity measured from the ground surface is studied. In this paper, the comparison experimental results of the velocity of underground transverse wave, the velocity of underground longitudinal wave, and the sound velocity measured from the ground surface are introduced. Furthermore, the effect on the image of underground objects brought forth by the sound velocity estimation is discussed.