Elastic electroencephalography dry electrode, electroencephalography device and application system

An elastic electroencephalographic dry electrode, comprising an electrode base and a plurality of dry electrode units fixedly arranged at the electrode base,

• wherein each dry electrode unit comprises an elastic support component and a plurality of electrode probe components, with one end of the elastic support component fixed to the electrode base and the other end of the elastic support component connected to the electrode probe components;
• the electrode probe components collect an electroencephalographic signal by contacting with a scalp;
• the electrode probe components are of a curved surface fitting to contact with the scalp;
• the electrode probe components are of a cross-section in a circular or oval shape;
• the electrode probe components are coated with a biocompatible material layer on its surface;
• outside the biocompatible material layer, the electrode probe components are further coated with a hydrogel layer;
• the elastic support component transmits the electroencephalographic signal;
• the electrode base comprises an electrode substrate component, an electrode unit fixation component and a plurality of electrode unit shift limitation components,
• wherein the electrode unit fixation component itself has an inclining angle and is fixedly arranged at the electrode substrate component, for fixing the dry electrode units to incline and spread outward;
• the plurality of electrode unit shift limitation components, are fixed uniformly and symmetrically at an upper end of the electrode unit fixation component, for limiting a maximum shift of the dry electrode unit on the scalp,
• wherein the electrode unit shift limitation component is of a height less than or equal to that of the shortest dry electrode unit;
• and
• the electrode substrate component fixes and connects the dry electrode unit and transmits the electroencephalographic signal collected to a data processing module,
• wherein the plurality of dry electrode units are arranged at the electrode substrate component in a layout of unipolar arrangement, bipolar arrangement, or multipolar arrangement,
• wherein based on the layout of the unipolar arrangement, the plurality of dry electrode units are arranged at the electrode substrate component in an array occupying a trapezoid, square or triangle area;
• and
• based on the layout of the bipolar arrangement or the multipolar arrangement, the plurality of dry electrode units are arranged at the electrode substrate component in an array of a circular ring or a triangular ring, forming a Laplacian electrode.