不同含水率稻谷电学物理量变化规律  

The Change Law of Electrical Physical Quantity of Rice with Different Moisture

作　　者：徐永阳 邓安 邱伟强[1] 李立[1,2] 金银哲 XU Yongyang;DENG An;QIU Weiqiang;LI Li;JIN Yinzhe(College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306;Engineering Research Center of Food Thermal-Processing Technology,Shanghai 201306)

机构地区：[1]上海海洋大学食品学院,上海201306 [2]食品热加工工程中心,上海201306

出　　处：《食品工业》2024年第2期114-120,共7页The Food Industry

摘　　要：为探究高水分稻谷含水率与其电学物理量之间的关系,探索电学物理量在高水分稻谷含水率快速检测方面的可行性,以高水分稻谷(含水率23.14%)为研究对象,利用LCR阻抗测试仪测定信号频率1~8 MHz下不同含水率稻谷的13个电学物理量。结果表明,阻抗的相位角、损耗系数、介电常数和等效并联电容与稻谷含水率具有良好相关性。在1~8 MHz频率范围内,稻谷的阻抗的相位角和损耗系数均随着频率的增加呈先增大后减小趋势,介电常数和等效并联电容均随着频率的增加而增大。1 MHz频率下稻谷的等效并联电容与其含水率具有更好的相关性(R2=0.998)。通过对不同含水率稻谷的电学物理量进行研究,为开发一种利用电学物理量预测稻谷含水率的快速检测技术提供理论基础。In order to explore the relationship between moisture of high moisture rice and electrical physical quantity,the feasibility of electrical physical quantity in rapid detection of moisture content of high moisture rice was explored.The high moisture rice(23.14%moisture)was taken as the research object.The LCR impedance tester was used to measure 13 electrical physical quantities of rice with different moisture content at signal frequency 1-8 MHz.The results showed that the phase Angle,loss coefficient,dielectric constant and equivalent parallel capacitance of impedance had good correlation with the water content of rice.In the frequency range of 1-8 MHz,the phase Angle and loss coefficient of the impedance of rice increased first and then decreased with the increase of frequency,and the dielectric constant and equivalent parallel capacitance increased with the increase of frequency.At the frequency of 1 MHz,the equivalent parallel capacitance of rice had a better correlation with its water content(R^(2)=0.998).By studying the electrical physical quantity of rice with different moisture,it provides a theoretical basis for developing a rapid detection technology using electrical physical quantity to predict the moisture content of rice.

关 键 词：高水分稻谷 含水率 频率 电学物理量 回归模型分析 

分 类 号：TS210.1[轻工技术与工程—粮食、油脂及植物蛋白工程]