CN102339127A - Design scheme of virtual Chinese and English universal keyboard controlled by brain waves - Google Patents
Design scheme of virtual Chinese and English universal keyboard controlled by brain waves Download PDFInfo
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- CN102339127A CN102339127A CN2011102695957A CN201110269595A CN102339127A CN 102339127 A CN102339127 A CN 102339127A CN 2011102695957 A CN2011102695957 A CN 2011102695957A CN 201110269595 A CN201110269595 A CN 201110269595A CN 102339127 A CN102339127 A CN 102339127A
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Abstract
A design scheme of a virtual Chinese and English universal keyboard controlled by brain waves is a novel human-computer interaction technology in which a brain-computer interface is adopted, and directly inputting English and Chinese information to a computer by using the brain waves can be realized through the design scheme. A realization method is as follows: a virtual keyboard composed of seven buttons is constructed in a computer screen, wherein every button of the keyboard comprises a button name and a small window, a character representing the button name is marked on the upper half part of every button, and the small window for inducing the brain waves is arranged at the lower half part of the button. The virtual keyboard comprises a homepage and six subpages, and a two-phase input method comprising the steps of selecting an area where a character to be input is arranged firstly and then selecting a target character in the selected area is adopted. The functions of 26 English characters, 10 numeric characters and 7 functional buttons of the keyboard are realized. Chinese and English switching is realized by a Chinese/English button of the forth subpages. The design scheme of the virtual Chinese and English universal keyboard controlled by brain waves can be used for information communication between the disabled and the outside and can also be applied to fields such as military, games and on the like.
Description
Technical field
This programme relates to a kind of brand-new man-machine interaction mode; Adopt the brain-computer interface technology to realize carrying out the typing (need not hand kbhit or speech recognition) of Chinese/English, a kind of and extraneous method that exchanges can be provided for the personage of the serious motion function forfeiture of paralysed patient and other with brain wave.
Background technology
What realize that the character input adopted with the brain wave control computer is a kind of human-computer interaction technology that is called brain-computer interface; This technology is through gathering the electric signal that produces in the human thinking activity; Then these signals are analyzed; Determine people's intention, and be converted into order and come smart machines such as control computer.Brain-computer interface can be divided into by the producing method of signal and bringing out and two types of spontaneous brain electricities.The mode of bringing out of evoked brain potential BCI has multiple modes such as vision, the sense of hearing, body sense.Wherein vision induced pattern has the branch of mode of operations such as stable state, transient state and event related potential again, is particularly suitable for the constructing virtual keyboard as information typing interface.
At present, existing multiple application system is come out, and mainly be divided into two big types and use: the first is directly controlled smart machines such as wheelchair, household electrical appliance with brain wave, and it two is the control that realizes computer cursor and keyboard.The invention belongs to second kind of application, be based on the brain-computer interface of vision induced event related potential (ERP), be used for realizing only just carrying out the input of computing machine Chinese and English without keyboard and mouse with brain wave.
In character typing field; The most representative is people such as U.S. Farwell and Donchin proposed, utilize one 36 key of P300 composition structure in the brain wave in 1988 dummy keyboard; Realized the typing [Electroencephalogr.Clin.Neurophysiol. of 26 English alphabets and 10 function keys; 70:510-523,1988].In addition, also have some to adopt the character transcription system of stable state vision inducting current potential brain-computer interface.
Mostly current brain-computer interface with character input function is the improvement of people's schemes such as U.S. Farwell and Donchin mostly to the English alphabet design.Aspect the typing of Chinese, Zhejiang University has reported a brain-computer interface system [electronic letters, vol, 37 (8): 1733-1738,2009] based on the stroke input, and other Chinese character input system or Chinese and English mix input system and do not appear in the newspapers.
Summary of the invention
The present invention is a kind of brand-new general Chinese and English input method; Through on computer screen, making up a Chinese and English input keyboard (visual stimulator) virtual, that can realize the Chinese and English switching; Certain button on the visual on-screen virtual keyboard of user just can stimulate human brain to produce specific EEG signals, and corresponding EEG signal is differentiated; Just can know its selected button, thereby reach the purpose of Chinese and English input.It is a kind of brain-computer interface technology of bringing out pattern based on " event related potential is read in simulation ".
The technical scheme that the present invention adopted is: dummy keyboard of being made up of the individual button of 7 (1 row * 7 row) of structure on computer screen; Each key grain of this keyboard is neglected window by key name and one and is formed; It is the little form of one 30 * 30 pixel that the first half mark of each key grain has the character of representing this key name to claim, Lower Half.This dummy keyboard adopts two methods of input mutually, district's (page or leaf) at the character place that promptly first selection will be imported, and select target character in the district that chooses (page or leaf) again is so the dummy keyboard of the present invention's structure is made up of a homepage and 6 sub-pages.The major function of homepage is the selection that realizes the 1st～6 subpage, and key name " a-g ", " h-n ", " o-t ", " u-z ", " 0-6 ", " 7-9 " represent the 1st subpage to the 6 subpages of dummy keyboard respectively, and key name " deletion " is represented deletion action.The key name of the 1st subpage " a ", " b ", " c ", " d ", " e ", " f ", " g "; The key name of the 2nd subpage " h ", " i ", " j ", " k ", " l ", " m ", " n "; The key name of the 3rd subpage " o ", " p ", " q ", " r ", " s ", " t ", " closing "; The key name of the 4th subpage " u ", " v ", " w ", " x ", " y ", " z ", " in/English ", the key name " 0 " of the 5th subpage, " 1 ", " 2 ", " 3 ", " 4 ", " 5 ", " 6 ", the key name of the 6th subpage " 7 ", " 8 ", " 9 ", " ← ", " → ", " space ", " carriage return ".This dummy keyboard has been realized 26 English characters, the typing of 10 numerical characters and 7 function keys.The switching of Chinese and English by the 4th subpage " in/English " button realize (this dummy keyboard in use, supporting use " search dog/QQ spelling input method ", certainly, other any input method all can).In the process that the user uses, the selection of each character needed for two steps can accomplish, and the first step is that certain button of homepage is selected, and chooses the subpage at this character place, and second step so went round and began again to choosing the target character in the subpage to select.Based on such principle; Though have only 7 constraint terms on the interface of our structure, after each the selection, the key name of these 7 constraint terms all can be made corresponding variation according to the selection in a last step; Like this, 7 constraint terms just not only can only be imported 7 different characters.
The beneficial effect of this programme is; This two phases (Two Phase) input method that adopts has realized 26 English characters, the typing of 10 numerical characters and 7 function keys; And each moment of the dummy keyboard that makes up all has only 7 constraint terms to be presented on the screen; So not only improved the accuracy rate of brain power mode identification, and had only 7 buttons on the display at any time, minimum has been reduced in the interference that other application programs are used because of the constraint term number that has reduced each selection.Have in the dummy keyboard in one/English switching push button, realized the flexible switching of phonetic transcriptions of Chinese characters input, like this, can not only import English character, can also import Chinese character with English input.
Description of drawings
Fig. 1 is the structure flow chart of this programme.
Fig. 2 is the homepage of the dummy keyboard of this programme structure.
Fig. 3 is the 1st subpage of the dummy keyboard of this programme structure.
Fig. 4 is the 2nd subpage of the dummy keyboard of this programme structure.
Fig. 5 is the 3rd subpage of the dummy keyboard of this programme structure.
Fig. 6 is the 4th subpage of the dummy keyboard of this programme structure.
Fig. 7 is the 5th subpage of the dummy keyboard of this programme structure.
Fig. 8 is the 6th subpage of the dummy keyboard of this programme structure.
Fig. 9 is the word state to be selected of input Pinyin " ni " back input method behind employing this programme.
Embodiment
The structure flow chart of this programme is as shown in Figure 1.In the process that the user uses, the selection of each character needed for two steps can accomplish, and the first step is that certain button of homepage is selected, and chooses the subpage at this character place, and second step so went round and began again to choosing the target character in the subpage to select.
The homepage of the dummy keyboard that this programme constructs and subpage such as Fig. 2 are to shown in Figure 8.
Embodiment:
The user hopes on computer screen, to import an English word " a " and a Chinese character " you " through this interface.And English character " a " is on the 1st key grain of the 1st subpage; What then hope input is a Chinese character, then need carry out Chinese and English input conversion, and switching button is on the 7th key grain of the 4th subpage; The phonetic of Chinese character " you " is " ni ", and " n " and " i " is respectively on the 7th of the 2nd subpage and the 2nd key grain.For the input of English character " a ", needed for two steps selected and can accomplish, this selects the first step to homepage " a-g ", and is as shown in Figure 2, and after the selection, dummy keyboard is with as shown in Figure 3.Second step was selected " a " button in the subpage of choosing, and had so just accomplished the input to English character " a ".Next will carry out Chinese and English input blocked operation, the completion of this operation needed for two steps selected equally, and the first step is selected homepage " u-z " button, and is as shown in Figure 2, and after the selection, dummy keyboard is with as shown in Figure 6.Second step was selected " in/English " button in the subpage of choosing, and had so just accomplished blocked operation.After Chinese and English switches, be and the same step of English character " a " input that after " n " and " i " all imported, input method was with as shown in Figure 9 to what the input of phonetic " ni " was taked.Chinese character " you " is positioned at first position of candidate; This position choice can be through accomplishing the selection of numerical character " 1 "; Numerical character " 1 " is on the 2nd key grain of the 5th subpage; Its typing is same identical with the typing step of English character " a ", after " 1 " selection finishes, will show on the computer screen " a you ".
Claims (5)
1. the virtual Chinese and English universal keyboard design proposal with brain wave control is characterized in that: on computer screen, make up a dummy keyboard of only being made up of 7 buttons, be aided with the brain wave acquisition treating apparatus; Can realize the main function of conventional keyboard; Carry out Chinese and English mixing input, the input mode of two phases is adopted in the input of each character, district's (page or leaf) at the character place that promptly first selection will be imported; Again in the district that chooses (page or leaf), the select target character.
2. according to the scheme in the claim 1, it is characterized in that dummy keyboard is made up of a homepage and 6 sub-pages, each page or leaf all is made up of 7 buttons; The major function of homepage is the selection that realizes the 1st～6 subpage, and key name " a-g ", " h-n ", " o-t ", " u-z ", " 0-6 ", " 7-9 " represent the 1st subpage to the 6 subpages of dummy keyboard respectively, and key name " deletion " is represented deletion action; The key name of the 1st subpage " a ", " b ", " c ", " d ", " e ", " f ", " g "; The key name of the 2nd subpage " h ", " i ", " j ", " k ", " l ", " m ", " n "; The key name of the 3rd subpage " o ", " p ", " q ", " r ", " s ", " t ", " closing "; The key name of the 4th subpage " u ", " v ", " w ", " x ", " y ", " z ", " in/English ", the key name " 0 " of the 5th subpage, " 1 ", " 2 ", " 3 ", " 4 ", " 5 ", " 6 "; The key name of the 6th subpage " 7 ", " 8 ", " 9 ", " ← ", " → ", " space ", " carriage return "; Putting in order of these symbols is unimportant, and function key also can be provided with flexibly; This dummy keyboard can be realized 26 English characters, the typing of 10 numerical characters and 7 function keys.
3. according to the scheme in the claim 1, it is characterized in that whenever all having only 7 buttons on the display; The selection of each character was divided into for two steps; The first step person of being to use watches the stimulation window under certain button in the homepage attentively, thereby realizes the selection to target character location (subpage), at this moment; This subpage covers homepage fully, still has only 7 buttons on the display; Second step was to watch the select target button of wanting in this subpage attentively, thereby realized the selection to a character; The page reverts to the homepage interface automatically immediately, waits for selection next time.
4. according to the scheme in the claim 1, it is characterized in that, designed a function key that the Chinese and English input is switched in the dummy keyboard,, realize the conversion of Chinese and English input through operation to this function key.
5. according to the scheme in the claim 1; It is characterized in that the user whenever makees a button and selects, and will from brain wave, analyze the command conversion that obtains and become keypad code to send into the keyboard buffer of computing machine; Simulated the process of hand kbhit, therefore had the versatility the same with common keyboard.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107239137A (en) * | 2017-04-25 | 2017-10-10 | 中国农业大学 | A kind of character input method and device based on dummy keyboard |
| CN113568503A (en) * | 2021-07-21 | 2021-10-29 | 复旦大学 | Communication system based on steady-state visual evoked potential |
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| CN101201696A (en) * | 2007-11-29 | 2008-06-18 | 浙江大学 | Chinese input BCI system based on P300 brain electric potential |
| CN101515199A (en) * | 2009-03-24 | 2009-08-26 | 北京理工大学 | Character input device based on eye tracking and P300 electrical potential of the brain electricity |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101201696A (en) * | 2007-11-29 | 2008-06-18 | 浙江大学 | Chinese input BCI system based on P300 brain electric potential |
| CN101515199A (en) * | 2009-03-24 | 2009-08-26 | 北京理工大学 | Character input device based on eye tracking and P300 electrical potential of the brain electricity |
Non-Patent Citations (1)
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| 马忠伟，高上凯: "基于P300电位的脑机接口系统中参数优化问题的研究", 《中国生物医学工程学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107239137A (en) * | 2017-04-25 | 2017-10-10 | 中国农业大学 | A kind of character input method and device based on dummy keyboard |
| CN107239137B (en) * | 2017-04-25 | 2019-11-15 | 中国农业大学 | A kind of character input method and device based on dummy keyboard |
| CN113568503A (en) * | 2021-07-21 | 2021-10-29 | 复旦大学 | Communication system based on steady-state visual evoked potential |
| CN113568503B (en) * | 2021-07-21 | 2024-02-13 | 复旦大学 | Communication system based on steady-state visual evoked potential |
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Application publication date: 20120201 |