title: Triboelectricity in capacitive biopotential measurements.
abstract: Capacitive biopotential measurements suffer from strong motion artifacts, which may result in long time periods during which a reliable measurement is not possible. This study examines contact electrification and triboelectricity as possible reasons for these artifacts and discusses local triboelectric effects on the electrode-body interface as well as global electrostatic effects as common-mode interferences. It will be shown that most probably the triboelectric effects on the electrode-body interface are the main reason for artifacts, and a reduction of artifacts can only be achieved with a proper design of the electrode-body interface. For a deeper understanding of the observed effects, a mathematical model for triboelectric effects in highly isolated capacitive biopotential measurements is presented and verified with experiments. Based on these analyses of the triboelectric effects on the electrode-body interface, different electrode designs are developed and analyzed in order to minimize artifacts due to triboelectricity on the electrode-body interface.
authors.affiliation: RWTH Aachen University, Aachen 52074, Germany. wartzek@hia.rwthaachen.de
authors.forename: Tobias
authors.initials: T
authors.lastname: Wartzek
authors.forename: Thomas
authors.initials: T
authors.lastname: Lammersen
authors.forename: Benjamin
authors.initials: B
authors.lastname: Eilebrecht
authors.forename: Marian
authors.initials: M
authors.lastname: Walter
authors.forename: Steffen
authors.initials: S
authors.lastname: Leonhardt
mesh_terms: D000465:Algorithms; D016477:Artifacts; D003198:Computer Simulation; D025802:Electric Capacitance; D004562:Electrocardiography / Q000295:instrumentation*; D004566:Electrodes; D017276:Friction; D006801:Humans; D006813:Humidity; D008670:Metals; D013499:Surface Properties; D013784:Textiles; D014934:Wood
chemical_list: D008670:Metals