Method for measuring concentration of PAM solution based on perturbation resonant frequency

The invention relates to a PAM solution concentration measuring method based on perturbation resonant frequency. Based on a cylindrical microwave resonant cavity structure with a working mode and a resonance perturbation principle, the invention proposes that the concentration of the measured PAM solution is represented through the resonant frequency of a perturbation cavity. The method comprises the following steps: firstly, measuring the change conditions of relative dielectric constants and conductivity of PAM solutions with different concentrations under related frequency bands by using a microwave coaxial probe, and then measuring an S11 parameter curve of a perturbation cavity under the disturbance of the solutions with different concentrations by using a vector network analyzer to obtain a corresponding resonant frequency value; and substituting into a corresponding mathematical model to obtain the concentration of the measured PAM solution. 本发明涉及一种基于微扰谐振频率的PAM溶液浓度测量方法。本发明基于工作模式为的圆柱形微波谐振腔结构以及谐振微扰原理提出，通