基于电特性的大豆含水率测量研究  

A Study on Measurement of Soybeans Moisture Content Based on Dielectric Properties

作　　者：鲍一丹[1] 朱哲燕[1] 

机构地区：[1]浙江大学生物系统工程与食品科学学院,杭州310029

出　　处：《中国食品学报》2006年第2期94-98,共5页Journal of Chinese Institute Of Food Science and Technology

基　　金：浙江省自然科学基金资助项目(M303466)

摘　　要：为了对大豆含水率进行快速无损测量,提出了利用大豆电特性进行含水率测量的原理及装置。由大豆介质套筒式电容器、信号发生器、信号测量仪组成了检测装置,研究不同测试频率时大豆的介电特性(等效电容、损耗角正切、等效电阻)与含水率的关系。研究表明:合适的测试频率为1kHz;经单纯形法拟合,等效电容与含水率呈幂函数关系。为大豆含水率的快速测试提供了一种新方法。In order to measure soybeans moisture content fast and undamaged, the measurement principle and device using soybeans dielectric properties was put forward. Test device was made by sleeve capacitor full of soybean medium, signal generator and signal measuring instruments. The relationship between dielectric parameters （equivalent capacitance, loss tangent, resistance） and moisture content in different frequency were investigated. It indicated that the best testing frequency was about 1 kHz, the capacitance was related to moisture content by power-law, deviation analysis was also made. A new method was provided for the fast measurement of soybean moisture content.

关 键 词：大豆 含水率 介电特性 测量 

分 类 号：TS214.2[轻工技术与工程—粮食、油脂及植物蛋白工程]