空气负离子浓度的实验研究

测试了周围生活环境中的空气负离子浓度，并通过实验测试了衰减距离、摩擦、风速、温度、湿度等影响因素对材料产生负离子的影响．实验结果表明，周围生活环境中空气负离子浓度小于500个／cm^2，外界空气负离子浓度大于1500个／cm^2，空气负离子在环境中的衰减距离为20cm左右．当临界风速处于3m／s-10m／s之间，风速的摩擦可以产生负离子；相对于摩擦，温度、湿度的变化对材料产生负离子的影响较小．

Experimental research on the concentration of negative air ions

The concentration of negative air ions in the surrounding environment is tested. A series of experiment on influence to the anion emission measure of material by the decay distance, friction, wind velocity, temperature and relative humidity are carried on. The result indicates that the negative air ions amount in the surrounding environment is less than 500/cm3and the external environment is more than 1 500/cm^3. The decay distance of anion in the air is about 20 cm. When the critical wind velocity is between 3m/s and 10m/s, the friction of wind can produce anion. The effects on the anion emission measure by temperature and relative humidity are smaller than that by friction.