Device and method for automatically detecting and controlling charge quantity of powder particles

The invention provides a powder particle charge capacity automatic detection and control device and method, a feeder throws powder particles into a feeding pipe, the feeding pipe is connected with a fan and a friction charge barrel, and airflow provided by the fan conveys the powder particles to the friction charge barrel; the friction charge cylinder is used for performing friction collision charge on powder particles entering the friction charge cylinder, the detection tube is used for conveying the charged powder particles to the Faraday cup, and the charge recorder is used for measuring the charge quantity of the powder particles in the Faraday cup; the cyclone A is connected with the Faraday cup and is used for cleaning powder particles in the Faraday cup; the cyclone B is respectively connected with the Faraday cup and the feeding pipe and is used for conveying the powder particles in the Faraday cup to the feeding pipe; and opening and closing of the cyclone A and the cyclone B are automatically contro