微波测量纤维含水率的方法

选择棉花、羊毛、腈纶纤维为试验材料,通过不断给纤维加湿以获得不同含水率的样品.利用自制的波导网络分析仪,研究不同纤维材料的含水率与电磁波的屏蔽效能和功率吸收率之间的关系.结果表明,纤维材料本身对电磁波的影响可以忽略不计.不同含水率的纺织材料对电磁波屏蔽效能的变化趋势符合指数规律;不同含水率的纺织材料对电磁波的功率吸收率与其含水率的变化符合线性规律.因此,在纤维贸易、加工等过程中,可通过使用微波仪器快速测量其屏蔽效能值来反映它们的含水率.

Method of measuring moisture content of fiber by microwave

In this paper,cotton,wool and acrylic fibers were chosen as experimental materials and different moisture contents were obtained by continuous wetting.The relationship between the moisture content in different textile materials and the shielding efficiency and power absorption of microwave was studied with self-made waveguide-network analyzer.The results indicated that the effect of fiber material on microwave can be ignored and the moisture content of different fiber had an approximate exponential relation...