为了探索以电特性区分微观损伤荔枝的可能性,设计了荔枝电学参数测试系统,测试了经挤压微观损伤处理荔枝和对照荔枝在10个测试频率下的复阻抗Z、并联等效电感Lp、并联等效电容Cp、并联等效电阻Rp、品质因子Q等5个电参数。结果表明:除品质因子外,其余电参数均随频率的增大而减小;在一定测试频率下,损伤荔枝与对照荔枝的电参数均差异显著;损伤荔枝与对照荔枝最佳区分的电参数频率是0.8 kHz。

The litchi electrical parameters testing system was designed to test litchi microstructure damage. Five electrical parameters such as complex impedance( Z),parallel equivalent inductance( Lp),parallel equivalent capacitance( Cp),parallel equivalent resistance( Rp) and quality factor( Q) were measured at ten frequencies to explore the possibility of determining micro-damage of litchi. The results indicated that all electrical parameters decreased with increasing frequency except quality factor. In addition,electrical parameters of litchi between the damage and the control were significantly different at certain frequencies. The best electrical parameters frequency to distinguish the damage was 0. 8 kHz.