Ruan Fangming

Control design and application of a new ESD measurement system for influence analysis of different factors on parameters

A new measurement system has been created for investigation of non-contact electrostatic discharge(ESD). An automotive control section of gas pressure was designed to meet the requirement of the new invented ESD measurement system. Experiment result with the new ESD measurement system shown that gas pressure and relative humidity have distinctive effect on peak value, rise/fall time of discharge current. Some possible mechanism was discussed for the influence of gas pressure and relative humidity. On-off state of solenoid valve was decided once received feedback signal from sensor through applying PID algorithm to output PWM impulse. Desired stable value can be obtained and improved performance of the new ESD measurement system.

Effect analysis of relative humidity on non-contacted Electrostatic Discharge

Electrostatic Discharge (ESD) parameters of breakdown voltage, current, electric field, magnetic field, arc length, rise slope, shown distinctive variation because of effect from environment multiple factors of gas pressure, electrode speed to the target, temperature, humidity, type of gas. Measurement results have obviously low repeatability in non-contacted electrostatic discharge due to effect of surrounding multiple factors. Investigation of ESD parameter low repeatability were performed with methods of theory and experiment because of its much important theory and practice significance to understand ESD properties and to protect electronic systems from ESD harm. Discharge peak values variation caused by relative humidity were described and discussed. Analysis was given on possible mechanism of low repeatability of ESD parameters.

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.