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Method of asynchronous brain switch based on steady state visual evoked potentials

A steady-state visual induction and brain switch technology, applied in the field of human-computer interaction, can solve problems such as difficult to meet the online control system, large training time, etc., to increase fun and practicality, improve quality of life, and reduce misjudgment rate Effect

Active Publication Date: 2012-11-28
华南脑控(广东)智能科技有限公司
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Problems solved by technology

The present invention comprehensively utilizes the neurophysiological phenomenon of the steady-state visual evoked potential, proposes a pseudo-key mechanism, improves the idle state detection ability of the asynchronous brain-computer interface system, and applies this method to the control of the brain switch, solving the existing problems The asynchronous brain switch technical solution requires a lot of training time, which is difficult to meet the technical problems of the actual online control system

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  • Method of asynchronous brain switch based on steady state visual evoked potentials
  • Method of asynchronous brain switch based on steady state visual evoked potentials
  • Method of asynchronous brain switch based on steady state visual evoked potentials

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0034] Such as figure 1 Shown, be the working interface diagram of the present invention, contain 4 buttons around it, namely 4 SSVEP flashing keys, 4 buttons flash with different frequencies respectively; Wherein upper key " on / off " is switch key, indicates Switching of the switch state of the system; the other three keys are pseudo keys, without any operation. The present invention only cares whether the switch key on the upper side contains SSVEP potential, and does not care whether the pseudo key contains SSVEP potential. The advantage of this is to increase the SSVEP detection condition of the switch key and reduce the false detection rate in idle state.

[0035]We define the human brain as two states, control state and idle state. The user puts on the electrode ...

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Abstract

The invention discloses a method of an asynchronous brain switch based on steady state visual evoked potentials. A twinkling on-off key and three twinkling pseudo-keys are arranged on the brain switch; and the states of a user comprise a control state and a leisure state. When the user wants to enter the control state, the user watches the on-off key; and when the user wants to enter the leisure state, the user neglects the on-off switch. The scalp brain electrical signals of the user are collected through an electrode cap; after filtering, SSVEP (Steady State Visual Evoked Potential) detection is performed to classify the two states of the user. If the SSVEP energy of the on-off switch is greater than that of other pseudo-keys and the ratio of the narrowband energy to the broadband energy of the on-off switch exceeds a predetermined threshold, the control state is determined; otherwise, the leisure state is determined. The method of the asynchronous brain switch improves the accuracy of leisure state monitoring and meets the performance requirements of the user through the arrangement of combining the on-off key with the pseudo-keys based on the steady state visual evoked potentials.

Description

technical field [0001] The invention belongs to the technical field of human-computer interaction, and in particular relates to an asynchronous brain switch method based on steady-state visual evoked potential, which can be used to help disabled people operate external devices such as computers, and can also be used for new electronic entertainment equipment for brain-computer interaction. Background technique [0002] In modern society, some diseases (such as stroke, epilepsy, etc.) or car accidents may cause patients to suffer from quadriplegia and loss of muscle movement ability, which seriously affects the quality of life of such patients, but such patients still have consciousness, brain You can still think. Therefore, it is very important not only for individuals, but also for their families and society to study how to decode patients' intentions, and then realize the control of home appliances, wheelchairs and other equipment, so as to improve the self-care ability of...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01
Inventor 李远清潘家辉
Owner 华南脑控(广东)智能科技有限公司
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