Electrostatically Induced Voltage Generated in Different Box Types of Electronic Equipment Due to Moving Charged Objects

Although static electricity is commonly utilized in devices such as photocopiers, it often results in malfunction or failure in electronic equipment. When a conductive object housed in a partially opened box is positioned near a charged object, electrostatic induction causes the conductive object to become electrified. For instance, the human body becomes electrified when a person stands up and moves away from a chair. In this experiment, induced voltages generated in different types of boxes were measured using an induction electrode, paired with a spark gap and an electromagnetic wave sensor, as a charged body moved away from the box. The findings indicate that an electrostatically induced voltage ranging from −0.27 to −0.44 times against the voltage of the charged body is generated in the box when the distance between the charged body and the box is 0.02 m. These results are valuable for mitigating the risk of malfunction or failure in electronic equipment.