Mobile terminal based steady-state visual evoked potential brain computer interface system

Abstract

The present invention belongs to the technical field of bio-crossing, particularly relates to a mobile terminal based steady-state visual evoked potential (SSVEP) brain computer interface system, and aims to solve the problem in use of SSVEP on a mobile terminal. The system is characterized by comprising three modules: a stimulator module, an electroencephalogram collection module and a target identification module, wherein the stimulator module is used to generate electroencephalogram stimulation signals visually; the electroencephalogram collection and pre-processing module is used to collect brain waves and perform noise reduction; and the target identification module is used to identify processed brain wave signals. According to the mobile terminal based SSVEP brain computer interface system provided by the present invention, the flicker frequency is accurate, the carrying is convenient, and relatively good results can be achieved without the need for training. The system is suitable for occasions with relatively small target number and frequently changing application places, such as wheelchair controlling, mouse controlling, commercial entertainment development and the like. The system further expands the application range of brain computer interfaces and has a 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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