摘要
我们研制了一种新型的耐水性高分子薄膜湿度传感器,其湿敏材料是由一种基质聚合物和碱金属盐形成的配合物. 测定了这种传感器在不同湿度下的复数阻抗,为测量线路设计中的参数选择提供了必要的依据.用一个RC振荡电路测量了传感器的振荡频率与相对湿度的关系.结果表明,传感器除了具有响应快、滞后小、灵敏度高等优点外,在它遇水汽结露后,返回各相对湿度时其电参量仍几乎不变,即具有极好的耐水性;在20％—90％RH范围内,传感器的振荡频率与相对湿度的关系几乎是线性的.
We have developed a new type of water-resistive polymeric humidity sensor. The humidity-sensitive material of the sensor was made of complex formed between a host polymer and an alkali salt.The complex impedance of the sensor was determined under various humidities to provide one requirement for selecting of parameters in the design of measuring circuit. The relationship between oscillation frequencies and relative humidities was measured with a RC oscillatory circuit for the polymeric humidity sensor. The results show that the sensor has another merit, its electric parameters are nearly unchanged even after condensation of water vapor on it and evaporated again besides fast response, less hysteresis, high sensitivity and so forth. In other words, the sensor has excellent water resistivity. The relationship between oscillation frequencies and relative humidities (%RH) of the sensor is nearly linear over the range of 20%-90%RH.
出处
《大气科学》
CSCD
北大核心
1993年第3期369-373,共5页
Chinese Journal of Atmospheric Sciences
基金
国家自然科学基金
关键词
湿度传感器
振荡电路
传感器
耐水
Polymer-alkali salt complex
Humidity sensor
RC oscillatory circuit.
