本文探讨了陶瓷湿敏元件的导电机理;介绍了用无稳态多谐振荡器的R-f转换,使该元件的非线性特性转换成线性化频率输出的一种新技术.通过理论推导给出了线性输出的解析表达式.还作了实验验证.采用这种新技术可以使湿敏元件的线性化问题简化.湿度-频率转换器的线性范围为20～80％RH,灵敏度可达30Hz/%RH.此种转换技术对解决其它非线性敏感元件线性化问题也有一定的指导意义. In this paper, the conductive mechanism of ceramic humidity sensor is discussed, and a new technique of converting the nonlinear characteristic of the element into linearized frequency output by Rf conversion of the astable multivibrator is introduced.The theoretical derivation is given An analytical expression for the linear output is also validated experimentally with this new technique to simplify the linearization of the humidity sensor with a linearity of 20-80% RH and a sensitivity of up to 30 Hz / RH. This conversion technology is also of some guiding significance for solving the problem of linearization of other non-linear sensitive components.