Steady-state visual evoked potential brain-computer interface system based on mobile terminal

Abstract

The invention belongs to the technical field of biological crossover, and in particular relates to a mobile terminal-based steady-state visual evoked potential brain-computer interface system, which aims to solve the problem of using SSVEP on the mobile terminal. It is characterized in that: it includes three modules: stimulator, EEG acquisition and preprocessing, and target recognition; wherein, the stimulator module is used to generate brain electrical stimulation signals through vision, and the EEG acquisition and preprocessing module is used to collect brain waves and Noise reduction processing is performed, and the target recognition module is used to identify the processed brainwave signals. The mobile terminal-based steady-state visual evoked potential system of the present invention has accurate flicker frequency, is convenient to carry, and can achieve better results without training. It is suitable for occasions where the number of targets is small and the place of use changes frequently, such as wheelchair control, mouse control, commercial entertainment development, etc. The system further expands the application scope of the brain-computer interface and has certain practical value.

Description

technical field [0001] The invention belongs to the field of biological interdisciplinary technology, and in particular relates to a mobile terminal-based steady-state visual evoked potential brain-computer interface system. Background technique [0002] Electroencephalogram (EEG) is usually obtained by non-invasive scalp EEG recording, which contains a lot of useful information that people apply to brain-computer interface. Studies have shown that when receiving a visual stimulus of a fixed frequency, the visual cortex of the human brain will produce a continuous response related to the stimulus frequency (the fundamental frequency or double frequency of the stimulus frequency). This response is called the Steady-State Visual Evoked Potentials (SSVEP), which can be reliably applied to the Brain-Computer Interface (BCI). [0003] Many SSVEP brain-computer interface systems use light-emitting diodes or light-emitting sheets as stimulators. The use of luminescent film as a s...

AI Technical Summary

Problems solved by technology

However, on a mobile terminal with low processing power, it is very likely that the presentation time of the stimulus block will be wrong when the task is complex, resulting in the inability to accurately obtain the SSVEP response

The high requirements for the CPU make most SSVEP systems run on desktop platforms, so the volume is relatively large, which is not conducive to portability and limits the scope of use of SSVEP

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