Automatic proportioning system for indium electrolyte based on single neuron PID.

To address the problem that indium electrolyte needs to be manually proportioned and diluted several times during indium ion concentration measurement, this paper uses a single-neuron adaptive PID control algorithm, with STM32 as the core controller to study and design an automatic proportioning system for indium metal electrolyte. The control result of single-neuron PID is quantified by using pulse width modulation technique, and the PWM control signal is generated by the output of STM32. This signal is amplified by the speed regulation circuit and used to control the gear pump for pumping and proportioning. Experimental results show that the average error of the proportioning is only 0.35 ml, and the accuracy can reach 99.96%, which realizes the high-precision automatic proportioning and improves the efficiency of indium ion concentration measurement.