农业工程学报2012，Vol.28Issue(4)：269-274,6.DOI:10.3969/j.issn.1002-6819.2012.04.045
温度对火柿电学特性的影响
Effects of temperature on electrical parameters for ‘Huoshi' persimmon fruit
摘要
Abstract
In order to investigate the effects of temperature on electrical parameters for 'Huoshi' persimmon fruit, variation of electrical parameters with temperature of intact 'Huoshi' persimmon fruit was studied over a frequency range from 100 Hz to 3.98 MHz with LCR meter and parallel plate electrode. Frequency and temperature characteristics of electrical properties were also illuminated by biology and electromagnetism theories. The results showed that fruit impedance, inductance and low frequency (f≤15.8 kHz) conductance varied in exponential form with the increase of frequency. As the fruit temperature rised from 10°C to 40°C, fruit impedance decreased from 28% at 3.98 MHz to 38% at 1 kHz, the inductance 30% at 3.98 MHz to 38% at 1 kHz, while the capacitance increased from 43% at 3.98 MHz to 56% at 1 kHz, and the conductance had an increasing trend. Linearly correlation equations were built between fruit temperature and electrical parameters for the prediction of electrical parameter values at different temperatures. Frequency properties of fruit electrical parameters were attributed to the in-homogeneity of fruit structure, penetrating capacity variance of the electric field to the flesh and the variation of dominant dielectric loss factors at different frequency ranges, while the ionic conduction accounted for the temperature behavior of the electrical parameters.关键词
温度/电学特性/介电损耗/频率特性/柿/电参数Key words
temperature/ electric properties/ dielectric losses/ frequency response/ persimmon/ electrical parameters分类
农业科技引用本文复制引用
王瑞庆,周永洪,张继澍..温度对火柿电学特性的影响[J].农业工程学报,2012,28(4):269-274,6.基金项目
国家自然科学基金资助项目(30471001) （30471001）
