A Survey on the Technology of Dry Electrodes for EEG Recording

The technology of dry electrodes for EEG recording is one of the most popular research topics in the field of EEG signal processing.This technology has broad application prospects with the merits of simple use and few environmental constraints.After introducing the motivation for developing such technology,we describe the basic components of the dry electrode EEG recoding system and their functions.Then,we discusse three typical existing dry electrode EEG recording systems and introduce a simple performance analysis method.Finally,we presente the state-of-the-art dry electrode EEG recording systems,their main application fields and several problems that need to be solved.