樱桃番茄采后品质变化的介电特性研究

Cherry Tomatoes Postharvest Quality Change Dielectric Properties Research

农产品的介电特性与其内部品质密切相关。为了探索樱桃番茄内在品质及贮藏特性介电参数之间的相关性,依据介电特性检测原理,构建了无损检测系统,对电学检测的频率特性和电压特性进行初步研究,测量了番茄糖酸度及贮藏过程中品质变化相关的介电参数,包括等效阻抗Z、串联等效电阻Rs、损耗系数D、串联等效静电容量Cs、导纳Y等,并对测量数据用Excel进行分析和曲线拟合。结果表明:糖、酸度的与介电参数没有明显的相关性;随着番茄贮藏新鲜度的降低,D和Y均呈下降趋势,并具有显著地相关性,可为番茄贮藏过程中品质变化分析提供参考。

The dielectric properties of agricultural products and its internal quality closely related. In order to explore the cherry tomatoes inner quality and storage characteristic of the relationship between the dielectric parameters, Based on the detection principle of dielectric properties, Constructing the nondestructive testing system, Electrical testing of the frequency characteristics and voltage characteristic for preliminary research, Measuring the tomato sugar acidity and store process quality changes related dielectric parameters, Including equivalent impedance Z, serial equivalent resistance Rs, loss coefficient D, serial equivalent electrostatic capacity Cs, admittance Y, etc, And the measurement data with Excel analysis and curve fitting. The results show that ： Sugar, acidity and dielectric parameters have no obvious correlation; As for the determination of the freshness of tomato storage reduced, D and Y are tending to decline, and have significantly correlation, For tomatoes can store process quality change analysis to provide the reference.