Brain-machine interface method based on logic thinking and imaginal thinking

The invention discloses a brain-computer interface method and device based on logic thinking and imaginal thinking and relates to the field of novel pattern of brain-computer interface technology and feature extraction and classification. An experiment requires a testee for mental calculation and a three-dimensional object to rotate, signals of six electrodes are collected, and a common spatial pattern is adopted to extract feature values. Aiming at the problem that the common spatial pattern is suitable for multiple electrodes and the feature values, a common spatial filter algorithm is improved, electroencephalogram signals of one electrode are subjected to separation of different frequency bands and time periods, and the electroencephalogram signals are subjected to feature extraction calculation. The feature values are subjected to classification of a support vector machine, and excellent classification effect can be realized by the data processing mode through offline data analysis. A brain-computer interface based on logic thinking and imaginal thinking is constructed, reliability of a system is improved, experiment imaging difficulty and visual fatigue caused by long-term experiments are reduced, comfortability of the brain-computer interface system is improved, and application population range is expanded.