Humidity detecting system design for new measurement system of electrostatic discharge

Based on requirement of new invented ESD measurement system, detection design of humidity-controlled was proposed. Small gap electrostatic discharge (ESD) is greatly affected by factors of electrode moving speed and humidity and results in discrete characteristic of discharge parameters. Humidity test system design was given based on the STM32 in a sealed box with smart control PID algorithm. The design may promote investigation on the measurement system of multiple factor effect on discharge parameters, obtained a more convenience humidity control system.