Model Experiments on Underground Imaging from a Bored Hole by Ultrasound
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概要
- 論文の詳細を見る
The experimental results for seting up of a system to visualize stones in sand saturated with underground water, using the ultrasonic pulse echo technique, are described. 1) The speed of sound, 2) transmission efficiency, 3) directivity and 4) sound attenuation, are measured. It is shown that the profile of the surface of a small stone, about 30 mm in size placed in the sand several centimeters away from the wall of a bored hole can be detected by a 1 MHz ultrasound.
- INSTITUTE OF PURE AND APPLIED PHYSICSの論文
- 2000-05-30
著者
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HAYASHI Katsuhiko
Department of Animal Production, Ikuta Campus, Meiji University
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Yoshida Yasuo
Department Of Applied Quantum Physics Faculty Of Engineering Kyushu University
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Inoue Hiroshi
Deparment of Neurosurgery, Gunma University School of Medicine and Gamma Unit Center, Hidaka Hospital
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Hayashi Katsuhiko
Department of Electrical and Electronic Engineering, Faculty of Engineering and Resource Science, Akita University, 1-1 Tegatagakuencho, Akita 010-8502, Japan
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Yoshida Yasuo
Department of Electrical and Electronic Engineering, Faculty of Engineering and Resource Science, Akita University, 1-1 Tegatagakuencho, Akita 010-8502, Japan
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