High-frequency conductivity measuring system and method for solving polarization problem of sensor

The invention discloses a high-frequency conductivity measurement system and method for solving the polarization problem of a sensor, and the system comprises a microcontroller, a signal driving and detection circuit, and a channel selection and signal sampling circuit. The signal driving and detecting circuit comprises a positive and negative driving signal change-over switch, a signal conditioning circuit, a divider resistor and a conductivity sensor which are connected in sequence; a sensor pole plate short-circuit switch is connected between a positive pole plate and a negative pole plate of the conductivity sensor; the channel selection and signal sampling circuit comprises a multiplexer switch, a first voltage following circuit, a sampling holding control switch, a second voltage following circuit, a sampling holding circuit and a filter circuit which are connected in sequence. The polarization problem of the conductivity sensor is improved, the blank in the direction is filled, the production process i