Sleep tracking and waking optimization system and method therefor

摘要

Analog electrical and pressure data obtained by an EEG/pressure sensor matrix from the subject are sent to a signal processing module that derives digital EEG data from the electrical signal and pressure data without using sensors attached to a subject's head. The pressure data are used as a secondary signal to measure the physical orientation of the subject's head. The physical orientation is used to transform the derived EEG signal to a known coordinate axis (the orientation of the subject's head) to obtain useful, consistent, and accurate EEG data. The EEG may be used to determine a sleep state of a subject and to awaken the subject while in a particular state.

主权项

1. A system for acquiring an EEG signal suitable for use in electroencephalography from a subject, the system comprising:
a sensor matrix comprising a plurality of EEG electrodes configured to receive electrical signals from the brain of the subject and a plurality of pressure sensors configured to receive pressure signals indicative of the placement of the head of the subject on the sensor matrix; a processing control unit configured to perform operations comprising:
obtaining EEG electrode data from the electrical signals received by the sensor matrix;determining a scalar EEG voltage for each EEG electrode;obtaining pressure data from the pressure signals received by the sensor matrix;determining a pressure normal unit vector for each EEG electrode from the pressure data;summing the product of the pressure normal unit vector and the scalar EEG voltage for each EEG electrode to obtain a relative mean EEG vector; andobtaining an absolute scalar EEG vector from a dot product of a unit orientation vector and the relative mean EEG vector.