文档介绍：※基础研究食品科学 2012, Vol. 33, No. 03 1
基于介电特性的猕猴桃和桃果实品种识别研究
唐燕,张继澍*
(西北农林科技大学生命科学学院,陕西杨凌 712100)
摘要:以秦美猕猴桃、海沃德猕猴桃、秦光 2 号油桃和秦王桃为研究对象,探讨利用果实电学特性进行种类品
种识别实验的可行性,测定果实采收当日在电激频率 ~5MHz 范围内 24 个频率下的 7 个电参数(复阻抗 Z、并
联等效电感 L p 、损耗系数 D 、阻抗相角θ、串联等效电阻 R s 、电导 G 、并联等效电容 C p ) 变化。结果表明:
猕猴桃和桃果实的 lgZ 和 lgLp 与 lgf 均有很好的线性关系,R2 大于。在 100Hz~ 的电激励频率范围内,
可用 D 值来区分猕猴桃和桃果实。在 100Hz~ 的频率范围内,可用θ值和 Rs 值区分猕猴桃和桃果实。在
100Hz~100kHz 的频率范围内,可用 G 值来区分猕猴桃和桃果实。在 ~100kHz 频率范围内,可用 Z 来区分海
沃德猕猴桃、秦美猕猴桃、秦王桃、秦光 2 号油桃果实。在 100Hz~158kHz 频率范围内,可用 Cp 来区分猕猴
桃和桃两个种类及不同品种果实。
关键词:猕猴桃;桃;电特性;敏感电参数
Identification of Kiwifruit and Peach Varieties Based on Dielectric Properties
TANG Yan,ZHANG Ji-shu*
(College of Life Science, Northwest A&F University, Yangling 712100, China)
Abstract:In this study, two kiwifruit cultivars, Qinmei and Hayward, and two peach cultivars, Qinguang No. 2 and Qinwang
were used to explore the feasibility of distinguishing different fruit varieties based on electrical properties (complex impedance
Z, parallel equivalent inductance Lp, loss coefficient D, impedance phase angle θ, equivalent series resistance Rs, conductivity
G and parallel equivalent capacitance Cp). The results showed that a good linearity was found for the lgZ-lgf and lgLp-lgf
relationships of kiwifruit and peach with R2 > . Kiwifruit and peach could be distinguished by D value