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An asynchronous hybrid brain-computer interface method

A brain-computer interface, asynchronous technology, applied in the direction of mechanical mode conversion, computer components, user/computer interaction input/output, etc., can solve problems such as reducing mental load, reduce mental load, reduce eye fatigue, and avoid heights effect of concentration

Active Publication Date: 2021-09-07
SCI RES TRAINING CENT FOR CHINESE ASTRONAUTS
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AI Technical Summary

Problems solved by technology

Although gaze tracking and SSVEP systems both use the visual pathway, the former can achieve non-contact acquisition and does not need to be synchronized with the EEG signal acquisition. It is independent, will not affect the SSVEP system, and does not occupy other pathways and will reduce human brainpower load

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  • An asynchronous hybrid brain-computer interface method
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  • An asynchronous hybrid brain-computer interface method

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Embodiment Construction

[0047] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0048] In the present invention, the main function of the gaze tracking module is to collect the gaze signal of the human eye in real time, which includes the two-dimensional X-Y coordinates and gaze duration of the gaze point on the plane where the control interface is located; the main function of the EEG signal acquisition instrument It is: (a) collecting electroencephalogram (EEG) signals, (b) amplifying the collected EEG signal...

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Abstract

The invention discloses an asynchronous hybrid brain-computer interface method, which is based on gaze signals and steady-state visual evoked potentials. The steps are: (1) presenting a control interface, which includes valid areas and invalid areas; The module obtains the gaze signal, and judges whether the gaze duration exceeds the preset threshold according to the gaze signal, and whether the current gaze point is located in the effective area of ​​the control interface; (3) all target control keys in the effective area of ​​the control interface are imposed (4) While the step (3) is being implemented, continue to obtain the gaze signal from the gaze tracking module in the background, and judge in real time whether the current gaze point changes, and if the judgment result is yes, stop the step immediately Visual stimulation in (3) and return to step (2); (5) target recognition process, and output control commands according to the results. The invention has the advantages of simple principle, easy realization, high control precision, high information transmission rate, real-time asynchronous autonomous control, midway error correction and the like.

Description

technical field [0001] The present invention mainly relates to the technical field of brain-computer interface, in particular to an asynchronous hybrid brain-computer interface method based on fixation signals and steady-state visual evoked potentials. Background technique [0002] Brain-Computer Interface (BCI) is a new human-computer communication system that does not depend on the participation of peripheral nerves and muscles. It recognizes people's intentions by detecting and distinguishing the spatiotemporal patterns corresponding to different brain activities in EEG signals, and converts them into digital signals that can be recognized and executed by computers, and establishes direct communication between the human brain and peripheral devices . At present, BCI has broad application prospects in the fields of disability assistance, rehabilitation engineering, weapon equipment research and development, entertainment, etc., and has attracted extensive attention from d...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/01
CPCG06F3/015
Inventor 张绍尧田雨赵岩王春慧
Owner SCI RES TRAINING CENT FOR CHINESE ASTRONAUTS
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