成套开关设备防凝露用湿度传感器的设计  

Design of Humidity Sensor for Anti-condensing in Switchgear

作　　者：刘曙光[1] 孙兴丽[2] 

机构地区：[1]西安工程大学电信学院,陕西西安710048 [2]北京航空航天大学电信学院,北京100191

出　　处：《控制工程》2009年第S2期176-177,187,共3页Control Engineering of China

摘　　要：防止成套开关设备凝露的主要手段是加装温湿度控制器,以破坏凝露产生的条件,从而避免电器绝缘事故的发生。而湿度传感器又是此类控制器的关键检测元件,应具有抗干扰、防静电、防污秽、可在宽湿度范围内测量的特点。设计一种湿度传感器,利用HS1101高分子湿敏电容为基本感湿元件,通过振荡电路将反映湿度变化的电容值转换为脉冲量,再经过整流电路、积分电路和放大电路将脉冲量转换为0~3 V直流信号。所设计的传感器不仅满足了上述这些特殊要求,而且可靠性高,线性度好,成本低廉,特别适合于开关设备的湿度检测。The main method of anti-condensing in switchgear is fixing the temperature and humidity controllers in order to wreck the formation of condensation conditions to avoid the electrical equipment insulating fault,while humidity sensor is key detection component for those,which must has features of anti-jamming,anti-electrostatic,anti-pollution,wide humidity range.As basic humidity component,the macromolecule humidity sensitive capacitor is adopted in design of humidity sensor,in which capacitive value corresponding to humidity is converted into impulse variable by vibrating circuit,and then into 0～3 V direct current signal by rectifying circuit,integral circuit and amplifying circuit.The proposed humidity sensor has not only satisfied special needs above,but also is provided with reliability,linearity,cheapness,so it is especially fit for switchgear's humidity detection.

关 键 词：开关设备 电容式湿敏元件 传感器 相对湿度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]