Shuangpin Chinese input system based on steady-state visual evoked potentials

Abstract

The invention discloses a Shuangpin Chinese input system based on steady-state visual evoked potentials. The Shuangpin Chinese input system comprises a Shuangpin input keyboard, an electroencephalogram acquisition headband, a wireless transmission module and an upper computer. According to the system, flash stimulation is performed for a user by the aid of the Shuangpin input keyboard, the user gazes a key position wanting to select, a corresponding steady-state visual evoked potential can be generated, electroencephalogram signals are acquired by the electroencephalogram acquisition headband, transmitted to the Shuangpin input keyboard by the wireless transmission module, processed and encoded, and the processed and encoded signals are transmitted to the upper computer through a USB (universal serial bus), so that Chinese is inputted. The Shuangpin Chinese input system has the advantages of high integration level, easy to operate and convenient to use and can serve as auxiliary means for the disabled using computers.

Description

technical field [0001] The invention relates to a Shuangpin Chinese input system based on steady-state visual evoked potential, which is used for assisting disabled people to input Chinese in a computer, and belongs to the field of human-computer interaction. Background technique [0002] According to the latest statistics from the China Disabled Persons' Federation, the total number of people with disabilities in China has reached 85 million, accounting for about 6.21% of China's total population. In addition, as the population ages, some elderly people are also suffering from paralysis. A considerable number of elderly and disabled people have sound brain functions, but cannot use their body and voice for computer text input. In the Internet age, the difficulty of using computers has a great impact on their quality of life. [0003] Brain-computer interface technology is an emerging technology in the 21st century. This technology directly interacts with external devices t...

AI Technical Summary

Problems solved by technology

[0004] 1) Using computer software for visual stimulation requires self-developed host computer software to assist, which cannot be well connected with existing software input methods (such as Sogou input method);

[0005] 2) EEG acquisition requires a large number of electrodes;

[0006] 3) The wired connection is inconvenient to wear;

[0007] 4) Stroke input is more complicated

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