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应用科学学报 ›› 2003, Vol. 21 ›› Issue (2): 111-116.

• 论文 •    下一篇

粮食吸声谱特性的实验研究

郭敏1,2, 尚志远1, 石焕文1   

  1. 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
  • 收稿日期:2002-04-21 修回日期:2002-07-30 出版日期:2003-06-10 发布日期:2003-06-10
  • 作者简介:郭敏(1964-),女,江苏镇江人,副教授,博士;尚志远(1940-),男,陕西西安人,教授,博导.
  • 基金资助:
    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)

A Study of the Sound Absorption Property of Grain

GUO Min1,2, SHANG Zhi-yuan1, SHI Huan-wen1   

  1. 1 College of Physics and Information Technology, Shanxi Normal University, Xi'an 710062, China;
    2 Computer College, Shanxi Normal University, Xi'an 710062, China
  • Received:2002-04-21 Revised:2002-07-30 Online:2003-06-10 Published:2003-06-10

PDF

108

被引次数

10

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。

关键词: 储粮害虫, 吸声机理, 吸声系数, 粮食

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.

Key words: grain, sound absorption coefficient, sound absorption mechanism, pest in stored grain

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