| 粮食吸声谱特性的实验研究 |
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| 引用本文： | 郭敏,尚志远,石焕文. 粮食吸声谱特性的实验研究[J]. 应用科学学报, 2003, 21(2): 111-116 |
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| 作者姓名： | 郭敏 尚志远 石焕文 |
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| 作者单位： | 1.陕西师范大学物理与信息技术学院 陕西 西安 710062;2.西师范大学物理与信息技术学院 陕西 西安 710062 |
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| 基金项目： | 国家自然科学基金(39870467);国家自然科学基金(10274047);陕西师范大学青年基金(200215)资助项目 |
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| 摘 要： | 首次采用驻波管法对不同种类、不同堆积厚度(以下简称厚度)粮食的吸声性能进行了研究,在频率100~5000Hz范围内,粮食吸声性能与其种类及厚度的关系明显存在一定规律。粮食颗粒形状、大小的不同,使其吸声性能各异;粮食厚度增加,其吸声性能亦增加。该研究为储粮害虫声检测工作提供了理论依据及资料积累。
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| 关 键 词： | 储粮害虫 吸声机理 吸声系数 粮食 |
| 文章编号： | 0255-8297(2003)02-0111-06 |
| 收稿时间： | 2002-04-21 |
| 修稿时间： | 2002-07-30 |
A Study of the Sound Absorption Property of Grain |
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| GUO Min,SHANG Zhi-yuan,SHI Huan-wen. A Study of the Sound Absorption Property of Grain[J]. Journal of Applied Sciences, 2003, 21(2): 111-116 |
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| Authors: | GUO Min SHANG Zhi-yuan SHI Huan-wen |
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| Affiliation: | 1.College of Physics and Information Technology, Shanxi Normal University, Xi'an 710062, China;2.Computer College, Shanxi Normal University, Xi'an 710062, China |
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| Abstract: | By using the method of standing wave tube, we studied the sound absorption coefficient of grain for the first time. The sound absorption property of the grain piled in different thickness was researched. We found the relationship between the sound absorption property of a pile of grain and its shape, size and thickness within the frequency range of 100~5000Hz. It was shown that grain is a highly sound-absorbing medium. The sound absorption property of a pile of grain has something to do with its shape, size and thickness. This study provides a theoretical base and helps to accumulate data for detecting sound signals of the pests in grain. |
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| Keywords: | pest in stored grain: grain sound absorption coefficient sound absorption mechanism |
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