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Wireless BCI (Brain Computer Interface) input system based on SSVEP (Steady-State Visual Evoked Potentials) brain electric potential

An input system and EEG technology, applied in the field of human-computer interaction, can solve the problems of cumbersome wearing of electrode caps, high cost, and inconvenience for daily application.

Inactive Publication Date: 2015-11-04
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the design of BCI system is mostly based on multi-lead EEG acquisition equipment and host computer for analyzing EEG signals, which are expensive, difficult to carry, cumbersome to wear electrode caps, and inconvenient for daily use.

Method used

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  • Wireless BCI (Brain Computer Interface) input system based on SSVEP (Steady-State Visual Evoked Potentials) brain electric potential
  • Wireless BCI (Brain Computer Interface) input system based on SSVEP (Steady-State Visual Evoked Potentials) brain electric potential
  • Wireless BCI (Brain Computer Interface) input system based on SSVEP (Steady-State Visual Evoked Potentials) brain electric potential

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] see figure 1 When in use, the EEG headband 2 needs to be worn on the head of the user 3, the SSVEP keyboard 1 is placed in front of the user 3, and the EEG headband 2 is connected to the mobile smart device 4 through Bluetooth. The user 3 watches the keys on the SSVEP keyboard 1 to input the corresponding key values ​​to the mobile smart device 4 .

[0024] see figure 2 , the LED light source 13 at the bottom of the SSVEP keyboard 1 flickers according to a preset frequency. The mask 12 is made of a translucent material to filter a part of the light to avoid eye fatigue caused by strong light. The button window on the top of the shell 11 is made of a transparent material, and the rest are opaque. material.

[0025] see image 3 , the frontal lobe electrode 21 and the occipital lobe electrode 22 are fixed on the inner side of the EEG headband 2 , an...

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Abstract

A wireless BCI (Brain Computer Interface) input system based on SSVEP (Steady-State Visual Evoked Potentials) brain electric potential comprises a SSVEP keyboard and a brain electric headband. The SSVEP keyboard is used for inducing the SSVEP brain electric potential of a user and comprises buttons flashing according to a specific frequency, wherein a mask for marking a key value can be replaced; the brain electric headband comprises a brain electric acquisition module, a brain electric signal analysis module and a Bluetooth communication module which are respectively used for acquiring a brain electric signal of the user, identifying the SSVEP electric potential to determine an input intention of the user, and sending the key value to a matched mobile intelligent device through Bluetooth; and the brain electric headband is a portable wearable device and, and by combination with the SSVEP keyboard, can implement wireless control on the mobile intelligent device. According to the wireless BCI input system based on the SSVEP brain electric potential, a way of direct interaction between a human brain and the mobile intelligent device is provided, the action of a patient who loses action ability but has healthy thought can be assisted, and a convenient control tool for freeing the hands of healthy people is provided.

Description

technical field [0001] The invention relates to a BCI (Brain Computer Interface, brain-computer interface) system for controlling a mobile smart device by using human scalp brain electricity, which belongs to the technical field of human-computer interaction. Background technique [0002] BCI is an information transmission channel between the human brain and computers or other electronic devices. The technology does not rely on the conventional spinal cord peripheral neuromuscular system, providing a way for the human brain to directly exchange information with the external environment. BCI technology is a multidisciplinary and comprehensive research direction, involving biology, information, life science, computer, medicine and other disciplines, and is one of the current international research hotspots. [0003] Currently commonly used BCI systems can be divided into two categories: implantable acquisition (invasive) and non-implantable acquisition (noninvasive). Non-imp...

Claims

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Application Information

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IPC IPC(8): G06F3/01H04W4/80
CPCG06F3/0487G06F3/0236G06F3/04842H04W4/80G06F3/013G06F3/015G06F3/04886
Inventor 杨春兰聂英男李琬吴水才
Owner BEIJING UNIV OF TECH
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