Novel Detection Technique for Triboelectricity under Perfect Noncontact Condition

Abstract

In this study, we propose a new concept for triboelectricity measurement technique based on the measurement of current generated by electrostatic induction. The proposed technique can detect the occurrence of triboelectricity from the contact between two objects under perfect noncontact and in situ conditions. An instantaneous change, which is generated on the object as a result of friction between the objects, is observed in the electric potential of the object. Therefore, we can detect the electrostatic induction current of the order of a few picoamperes flowing through an electrode that is placed at a distance of 50 cm from the object. In order to confirm the effectiveness of this technique, the electrostatic induction currents generated from prototype rotating equipment were measured. An occurrence model is proposed for the electrostatic induction current generated as a result of a change in the electric potential of the object.