在一定条件下,多晶陶瓷湿敏薄膜元件的等效电路可简化为一个电阻和一个电容的并联体.本文提出了一种实用测试方法,可在某一测试信号频率下同时测出湿敏元件简化等效电路中的电阻分量Rp和电容分量Cp,复阻抗模|Zp|可由计算得到.本文结合实例详细阐述了该方法的基本原理和操作步骤,并在误差分析的基础上讨论了影响测试结果的主要因素.结果表明,该方法具有满意的精度,可控制在2%以下. Under certain conditions, the equivalent circuit of the polycrystalline ceramic humidity-sensitive thin film element can be simplified as a parallel body of a resistor and a capacitor.This paper presents a practical test method that can simultaneously detect the humidity at a certain test signal frequency Components of the simplified equivalent circuit resistance component Rp and capacitance component Cp, complex impedance model | Zp | can be calculated.This paper describes the basic principles and operation steps of the method in detail with examples, and discusses the impact on the basis of error analysis The main factors of the test results show that the method has satisfactory accuracy and can be controlled below 2%.