Method for Measuring Rate of Movement of Sand Using Laser Beam

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概要

• 論文の詳細を見る

• A new method for measuring the rate of movement of sand using an He-Ne laser beam has been developed. This method enables us to measure the velocity of blown sand in the field. The apparatus is composed of an He-Ne laser, a photo-detection system (slit width; 0.3-3.0 mm), a 5-channel pulse width analyzer and a multi-purpose counter. When a sand grain passes across the laser beam, a shadow is thrown upon the light-sensitive surface of the photodetector. The change in photocurrent, after amplification and pulse shaping, is fed to the pulse width analyzer. The pulse width includes information on both the velocity and size of the blown sand grains. Using a nearly uniform size of sand grains, the velocity distribution of blown sand can be measured.

• 社団法人応用物理学会の論文
• 1982-06-20

著者

• YOSHIDA Mizuki

  Department of Otorhinolaryngology, Sapporo Medical University

• Yoshida Mizuki

  Department Of Forestry Faculty Of Agriculture Kyushu University

• Tomita Giiti

  Department Of Forestry Faculty Of Agriculture Kyushu University

• NAKASHIMA Yuhki

  Department of Forestry, Faculty of Agriculture, Kyushu University

• SUE Katsumi

  Department of Forestry, Faculty of Agriculture, Kyushu University

• Sue Katsumi

  Department Of Forestry Faculty Of Agriculture Kyushu University:(present Address) Faculty Of Agricul

• Nakashima Yuhki

  Department Of Forestry Faculty Of Agriculture Kyushu University

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• Method for Measuring Rate of Movement of Sand Using Laser Beam
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