CONTACTLESS SENSOR AND DEVICE FOR RECORDING BIOELECTRIC ACTIVITY OF BRAIN Russian patent published in 2020 - IPC A61B5/478 

FIELD: medicine.

SUBSTANCE: group of inventions relates to medical equipment. Proximity sensor for recording electroencephalographic (EEG) signals includes holder (1), as well as flexible measuring (3) and neutralizing (4) electrodes connected to input of preamplifier (2). Holder is made from an elastic plate-like plate with two transverse ledges forming a recess in the middle part of the strip. Neutralizing electrode is located between measuring electrode and preliminary amplifier, is flexible and envelopes edges of measuring electrode. Preliminary amplifier is located in recess of resilient plate of holder. Electrodes with layers of insulating material (6) between them, as well as on the inner side of the measuring electrode and on the outer side of the neutralizing electrode form a single elastic element with a concave contact surface elongated along the holder and connected by a part of the outer surface to the preamplifier. Resilient plate of the holder presses from the outer side the resilient element with a concave contact surface. Edges (8, 9) of elastic plate of holder are used to fix position of resilient element with concave contact surface on head of user (7). EEG signal recording device comprises an EEG signal recorder fixed on a female head elastic material (10), and a contactless sensor connected to the recorder by a cable.

EFFECT: high noise immunity from external electromagnetic interference when measuring a useful signal owing to minimizing gaps and reducing the electric field penetrating to the measuring electrode in the gap between the edges of the electrode enveloping the measuring electrode and the head surface.

10 cl, 3 dwg