以红地球葡萄为研究对象,利用平行极板法,在50 Hz～1 MHz频率内研究了常温贮藏时间对其电特性参数的影响。结果表明:在50 Hz～1 MHz的频率内,随加载频率的增加其复阻抗、并联等效电容值呈减小趋势,电导值呈增大趋势,而损耗因子和品质因数在加载频率为25 KHz时分别达到极小值和极大值。在同一加载频率下,随贮藏时间的延长,红地球葡萄的复阻抗值和品质因数减小,并联等效电容、损耗因子和电导值增大。综合分析可知,常温下贮藏时间对红地球葡萄的电特性参数影响较大,且其电特性参数与电场频率有显著相关性。

The room temperature storage time on the influence of dielectric parameters of red globe grape were studied with parallel-plate electrode system in the rang of 50 Hz-1 MHz.The results show that with the increase of frequency the electric conductance and equivalent parallel capacitance increase and the equivalent impedance decrease and the loss coefficient and quality factor in 25 kHZ reached Minimum and maximum respectively.In the same frequency,the equivalent impedance and quality factor decrease and equivalent parallel capacitance,loss coefficient and the electric conductance increase with storage time increasing.Analysis the above result shows that the room temperature storage time on the electrical characteristics of red globe grape is bigger,and there is a strong correlation between the electrical characteristics parameters and electric field frequency.