食品科学 ›› 2012, Vol. 33 ›› Issue (3): 1-4.doi: 10.7506/spkx1002-6630-201203001

• 基础研究 •    下一篇

基于介电特性的猕猴桃和桃果实种类品种识别研究

唐 燕,张继澍   

  1. 西北农林科技大学生命科学学院
  • 出版日期:2012-02-15 发布日期:2012-02-14
  • 基金资助:
    农业部公益性行业(农业)科研专项(200903013)

Identification of Kiwifruit and Peach Varieties Based on Dielectric Properties

TANG Yan,ZHANG Ji-shu   

  1. College of Life Science, Northwest A&F University, Yangling 712100, China
  • Online:2012-02-15 Published:2012-02-14

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0.1kHz~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Lp、损耗系数D、阻抗相角θ、串联等效电阻Rs、电导G、并联等效电容Cp)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0.95。在100Hz~1.58kHz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~6.31kHz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15.8~100kHz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

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 > 0.95. Kiwifruit and peach could be distinguished by D value in the exciting frequency range of 100 Hz-1.58 kHz, by θ and Rs values in the range of 100 Hz-6.31 kHz, and by G value in the range of 100 Hz-100 kHz. Hayward, Qinmei, Qinwang and Qinguang No. 2 were distinguished by Z value in the range of 15.8-100 kHz and by Cp in the range of 100 Hz-158 kHz.

Key words: kiwifruit, peach, electric property, sensitive electrical parameters

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