CN100573622C - Multimedia brainwave feedback children learning and training method and instrument for training - Google Patents
Multimedia brainwave feedback children learning and training method and instrument for training Download PDFInfo
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Abstract
A kind of multimedia technology of utilizing is applied to learning training method and instrument for training in the children study, coaching method step with the biofeedback principle: 1, the multimedia children learn game training and begin; 2, gather children's brain wave, the 10 milliseconds of beta band power spectral density value of calculating brain wave 13-30Hz in every interval; 3, when the difference of back one result and last result's beta band power spectral density value during greater than threshold value 5, recreation will be toward carrying out triumphantly, otherwise then carry out to negative sense.This law is utilized the multimedia technology learning games of making more, the biofeedback principle is applied in children's the study to influence the change of cognitive activities, training process by this brainwave feedback, give full play to children's internal potential, training improves children and focuses one's attention on, the knowledge of animated content and pupil's textbook interrelates, and study, amusement and training are combined together.Instrument for training is simple to operate, easy to use with low cost.
Description
Technical field
The present invention relates to a kind of multimedia technology of utilizing the biofeedback principle is applied to learning training method in the children study.The invention still further relates to using the instrument for training that this learning training method is researched and developed.
Background technology
Modern science finds that human brain can send brain wave, traditionally it is divided into 4 frequency ranges according to the frequency difference of brain wave from application point of view: be called the δ ripple between the 0.5-3Hz, be " sound sleep ripple " again; Be called the θ ripple between the 4-7Hz, be " the shallow ripple of sleeping " again; Be called the α ripple between the 8-13Hz, be " lax ripple " again; Between the 14-30Hz or the higher β ripple that is called, be " excitation wave " again; Various ripples can exist simultaneously.Brain wave during the clear-headed duty of normal person even can reach 30Hz or higher more than 14Hz.Experiment shows, that sensorimotor rhythm (SMR) (E.E.G in the SMR ripple, β ripple scope) by strengthening 13-16Hz and the slow wave that suppresses 4-7Hz can improve is absent minded, impulsion property, the slight situations of moving more; Improve finishing skill and organizing skill of operation; Make behavior and school work improvement, achievement raising, sense of self-respect enhancing, ability to work improve, recognize more the potentiality of oneself.Therefore, can utilize this method of brain electricity biofeedback, approach to improve learning efficiency.It is the principle of application operating conditioned reflex, with the neural feedback is means, by the training optionally strengthen a certain frequency range brain wave, give full play to user's internal potential, old power rule formula is broken, form new, useful power rule formula, make the scholar play an active part in study to accomplish the end in view.Especially the age uses the efficient of this method study better the children more than 7 years old, compares with traditional medicinal treatment, and EEGBFT more can be given full play to user's internal potential, and the user is played an active part in.
Existing children learning machine mainly is that folk prescription encourages children to learn to stimulating by audiovisual, and up to the present, domestic to yet there are no any product be that the biofeedback principle is applied in children's the study.
Summary of the invention
First technical matters to be solved by this invention, just provide a kind of variation of the power spectral density value according to brain wave β ripple, control multimedia children learn game movie content change trend, optionally the brain wave of a certain frequency range is strengthened in training, to influence the change of children cognition activity, give full play to children's internal potential, study, amusement and training are combined together, thus the multimedia brainwave feedback children learning and training method of raising children learning interest.
The step of multimedia brainwave feedback children learning and training method is:
1, multimedia children learning training recreation beginning;
2, gather children's brain wave, every interval 1-10 millisecond calculates the beta band power spectral density value of brain wave 13-30Hz;
3, when the difference of back one result and last result's beta band power spectral density value during more than or equal to certain preset threshold, the multimedia learning amusement game will carry out toward the direction of triumph or advantage, otherwise then past reverse direction carries out.
Described multimedia learning recreation provides audiovisual to stimulate for the learning game animation that utilizes the special establishment of multimedia technology to children, and the content and the knowledge of textbook of animation interrelate, and study, amusement and training are combined together.
Described collection children brain wave is: the central area collection point, ear-lobe reference point and the place between the eyebrows earth point that 3 brain wave acquisition electrodes are attached to center, the children crown are respectively gathered brain wave, and get the power spectral density value that potential difference (PD) between central area collection point and the ear-lobe reference point is calculated the brain wave beta band.
Described calculating beta band power spectral density value is: the brain wave potential difference (PD) that collects is become digital signal through computing amplification, A/D analog to digital conversion, after isolating, photoelectricity carries out filtering again by the FFT computing, carry out the extraction computing of DTMF afterwards, the real-time wave amplitude and the frequency values of each wave band of extract real-time, isolate the analog value of beta band, calculate the beta band power spectrum density, per 10 milliseconds are calculated a power spectral density value.
Described threshold value is 5 (can regulate according to s own situation).
This training study method is applied to the biofeedback principle in children's the study to influence the change of cognitive activities, utilize the special learning game animation of multimedia technology establishment to provide audiovisual to stimulate to children, constantly the animated content that changes imports the continuous oblatio of children's brain into, and the continuous variation of corresponding E.E.G is arranged then; Numerical value situation according to the power spectral density value of E.E.G, drive the continuous variation of animated content again, new stimulation constantly is provided, the feedback E.E.G also correspondingly constantly changes thereupon, variation tendency by the control animated content, optionally the brain wave of a certain frequency range is strengthened in training, can influence the change of children cognition activity.Also can constantly show the variation of E.E.G and degree and operation integration that experimenter's notice is concentrated in the training process.By the training process of this brainwave feedback, reach the training child attention and concentrate and the destination of study.This learning training method is attached to pupil's knowledge of textbook content the feedback content of learning game, the knowledge of learning game animated content and pupil's textbook interrelates, can allow children in the process of training, improve scatterbrained situation, the interest of feedback content also can allow children more can be dissolved into training, actively cooperate training process, make training effect better, and more can allow children in the process of training, learn or the review knowledge of textbook, make its interest denseer to study.
Second technical matters to be solved by this invention just provides a kind of for using the instrument for training that above-mentioned learning training method is researched and developed.
Multimedia brainwave feedback children learning instrument for training of the present invention is provided with:
Brain wave acquisition processing module: form by the brain wave acquisition electrode, collection of simulant signal circuit, amplifying circuit of analog signal, analog to digital conversion circuit and the photoelectric isolating circuit that are electrically connected successively, acquisition electrode has 3, the central area collection point and ear-lobe reference point, the forehead that are attached to center, the crown respectively hit exactly earth point, forehead center earth point has tap collection point and reference point behind resistance along separate routes, gets the potential difference (PD) input collection of simulant signal circuit between central area collection point and the ear-lobe reference point;
Central control system: be implanted with the embedded system that the control application software that comprises recreation has been installed, recreation exports audio frequency to and the video output module arrives audio frequency and video-unit at last; Operation by system software, the eeg signal data that collect are carried out filtering by fft algorithm get the 1-34HZ wave band, adopt Goertzel algorithm and multiwindow method to calculate the power spectral value of brain wave frequency at the β of 13-30Hz ripple, and the difference that calculates current power spectrum value and last temporal power spectrum value be used as the playing driving of feedback, set a threshold value during recreation beginning, when this power spectrum difference meets or exceeds preset threshold, recreation is just carried out toward the aspect of triumph or advantage, otherwise then carry out in the opposite direction, will in external connection display equipment, show by the Display part;
The video output module carries out analog-converted with video signal;
The audio frequency output module, the output of control audio signal;
Video-unit is connected with the video output module by video interface;
Audio devices is connected with the audio frequency output module by audio interface;
Storage unit plays the information stores effect;
The work that switch element, the power supply supply by control entire circuit plate come control circuit board whether;
Each module and port, interface, storage unit, switch element respectively with central control system by bus transfer with accept instruction;
Circuit board is powered by a power module.
Described power supply carries out that the amplifier section for the brain wave acquisition processing module provides independent power supply after the electrical isolation.
Described central control system is circumscribed with the data input/output port, and it provides usb interface and rs232 serial ports, is used for communicating by letter with external USB flash disk or PC.
Described central control system is circumscribed with network interface, is connected with external PC by this interface, can debug and comes related transmitting information the software program on the central control system.
Described video-unit is computer monitor and televisor, is connected with central control system with the TV interface by the VGA interface respectively.
Described audio devices is bluetooth earphone or loudspeaker.
The software systems of device are by constituting with lower module:
---brain electric treatment module, accept the signal behind ADC conversion and digital filtering, and carry out power spectrum density and convert, extract the real-time wave amplitude and the frequency values of beta band at last, thereby calculate power spectral density value;
---the recreation driver module, the power spectrum density changing value of the real-time beta band that obtains with brain electric treatment module is as the controlled variable of game process, the learning game animation that utilizes the special establishment of multimedia technology is changed according to the power spectral density value of beta band, and the animation of variation is by video and audio frequency output.
This instrument for training utilizes the multimedia technology learning game animations of making more, the biofeedback principle is applied in children's the study to influence the change of cognitive activities, training process by this brainwave feedback, give full play to children's internal potential, training improves children and focuses one's attention on, the knowledge of learning game animated content and pupil's textbook interrelates, study, amusement and training combined together, and suitable compatriots use, simple to operate, easy to use with low cost.
Instrument for training is the domestic portable instrument, use singlechip technology, all program functions all are integrated on the single-chip microcomputer, E.E.G gather, all software functions such as filtering are integrated in a fritter circuit board chip, the extraction computing of employing DTMF obtains the real-time wave amplitude and the frequency values of β ripple, and, improve arithmetic speed greatly, thereby better guarantee the real-time of feedback training by hardware filtering; Instrument for training directly takes beta band as drive signal, directly influences in brain.The software of product is at circuit board chip stand-alone development, animation as stimulus can upgrade at any time by USB interface, the graphical interfaces of full explanation in Chinese, computor-keyboard is reduced to several buttons commonly used, simple to operate, understandable, the application habit that meets domestic patient is particularly useful for family and uses.
Description of drawings
Below in conjunction with drawings and the specific embodiments instrument for training of the present invention is described in further detail.
Fig. 1 is the total circuit side connector block diagram of the embodiment of the invention;
Fig. 2 is the brain wave acquisition processing module circuit diagram of embodiment;
Fig. 3 is the audio frequency output module circuit diagram of embodiment;
Fig. 4 is the storage unit circuit figure of embodiment;
Fig. 5 is the central control system of embodiment and the connector circuit figure on floor;
Fig. 6 is the Network Interface Module circuit diagram of embodiment;
Fig. 7 is the power unit circuit diagram of the circuit board of embodiment;
Fig. 8 is USB, the RSR232 interface data transmission module circuit diagram of embodiment;
Fig. 9 is the on-off circuit figure of embodiment;
Figure 10 is an embodiment video output module circuit diagram;
What the part among Figure 11 played is the effect of fixing circuit board;
Figure 12 is the electrode position vertical view of embodiment;
Figure 13 is the electrode position side view of embodiment.
Specific implementation method:
As shown in Figure 1, the structure principle chart of multimedia brainwave feedback children learning instrument for training embodiment of the present invention, its hardware comprises: brain wave acquisition processing module 1 and central control system 2, audio frequency output module 3, video output module 4, video-unit 5, audio devices 6, data transmission port unit 7, network interface unit 8, storage unit 9 and switch element 10, each module and port, interface, storage unit, switch element respectively with central control system by bus transfer and accept instruction, have a power module 11 (Fig. 7) to provide 5V direct supply in the whole instrument for training for the monoblock circuit board; Wherein:
Brain wave acquisition processing module (referring to Fig. 2) is made up of the brain wave acquisition electrode, collection of simulant signal circuit, chip amplifying circuit, analog to digital conversion circuit and the photoelectric isolating circuit that are electrically connected successively; Acquisition electrode has 3, because three electrodes and earphone all concentrate on user's head, therefore the present invention is fixed in the central area collection point that a helmet inboard corresponds respectively to center, the people crown, ear-lobe reference point and forehead center earth point, be convenient to electrode fixing like this at children head, make electrode be difficult for coming off because of the active of children, acquisition electrode is by (seeing Figure 12 with scalp, 13) brain wave is gathered in contact, the potential difference (PD) of getting between central area collection point and the ear-lobe reference point is carried out the signal amplification by the AD620 chip, be transferred to the Ads8320 chip and carry out analog to digital conversion, the analog signal conversion of amplifying is become digital signal, the AD SCLK of chip Ads8320, AD SDO and AD NCS port are connected with corresponding port in the ADuM2400 chip, digital signal after the conversion is carried out photoelectricity isolate in ADuM2400, the MCU that is transferred to central control system by bus EGPIO3 carries out computing then; The amplifier section of brain wave acquisition processing module is undertaken providing separately after the electrical isolation by power supply;
Central control system: its ARM9 platform transplantation has eCos operating system and driver and biofeedback software of the present invention, be implanted with the embedded system that the control application software that comprises recreation has been installed, recreation exports audio frequency to and the video output module arrives audio frequency and video-unit at last; Operation by system software, the eeg signal data that collect are carried out filtering by fft algorithm get the 1-34HZ wave band, adopt Goertzel algorithm and multiwindow method to calculate the power spectral value of brain wave frequency at the β of 13-30Hz ripple, and the difference that calculates current power spectrum value and last temporal power spectrum value be used as the playing driving of feedback, (this threshold value is just predefined before the recreation beginning to set a threshold value during recreation beginning, its value is stored among the Memory), when this power spectrum difference meets or exceeds pre-set threshold, recreation is just carried out toward the aspect of triumph or advantage, otherwise then carry out to negative sense, Display will show in external connection display equipment by the video output module;
The output of audio frequency output module Audio part (see figure 3) control audio signal, the UDA1341TS chip is an audio control chip, among the MCU music instruction is arrived this control chip by bus transfer, this control chip is by external audio frequency device bluetooth earphone or loudspeaker playing back music.After game training began, central control system will issue instructions to this module, played out the background music of game training then by external audio frequency apparatus;
Video output module Display part (Figure 10) is carried out analog-converted with video signal, because TV or VGA are used for exporting simulating signal, so this part is carried out analog-converted by the 74hc04 chip with digital signal, by VGA, TV control chip U15 VGA7005CTV, video information is shown by external video-unit computer monitor or TV then;
Data transmission port USB﹠amp; RS232 part (Fig. 8), this part provides USB and RS232 interface, the connection of MAX3232 chip controls RS232 serial ports, the information transmission of USB HOST control USB interface is used for communicating by letter with external USB flash disk or PC;
Network interface Ethernet part (Fig. 6), come related transmitting information by grid line, this part is to work by the RTL8201 chip, in the debug circuit plate, be connected with external PC by this interface during software, come related transmitting information by grid line, can debug and related transmitting information the software program on the central control system;
Storage unit (Fig. 4) K912808U0C chip plays the information stores effect, and the interim preservation as data buffering and instant operation result is connected with MCU by bus;
The work that switch element (Fig. 9), the power supply supply by control entire circuit plate come control circuit board whether.
The software systems of this instrument for training are by constituting with lower module:
---brain electric treatment module, accept the signal behind ADC conversion and digital filtering, and carry out power spectrum density and convert, extract the real-time wave amplitude and the frequency values of beta band at last, thereby calculate power spectral density value.
---the recreation driver module, the power spectrum density changing value of the real-time beta band that obtains with brain electric treatment module is as the controlled variable of game process, and the learning game animation that utilizes the special establishment of multimedia technology is changed according to the power spectral density value of beta band.The animation that changes is by video and audio frequency output.
The software function and the implementation method of system are as follows:
Development platform and developing instrument
Power spectrum density calculating of the present invention, beta band extraction procedure and animation playing program all are to compile with the C++ compiler under the eCos operating system.
The specific implementation of system software
The software section of instrument for training realizes that mainly the digital filtering of EEG signals, power spectrum density are calculated, β wave power spectral density value is extracted and animation is play.
Digital filter program:
Utilize fast fourier transformation algorithm that the buffer zone Wave data is transformed into frequency domain in real time, with the external interference signal of decay factor worry except that frequency band 1-34Hz.Carry out invert fast fourier transformation after filtering finishes again, make waveform be converted to time-domain signal again and output to the power spectrum density calculation procedure.
Power spectrum density is calculated and the beta band extraction procedure:
Extract the real-time wave amplitude and the frequency values of θ, α, each wave band of β by the extraction computing of the EEG signals of carrying out Filtering Processing being carried out DTMF, thereby calculate power spectrum density.Select the power spectral density value of beta band then.
The computing of described power spectral density value is spaced apart 10 milliseconds.
The animation playing program:
In system of the present invention, a power spectrum density reference value (threshold value) is arranged, be the recreation difficulty that user before the recreation beginning sets, default value is 5.The recreation starting image is a certain width of cloth picture in centre of game sequence.Carry out in the process in recreation, the β wave power spectral density value mean value that β wave power spectral density value that obtain a back second and last second obtain is made comparisons, the difference that draws is made comparisons with reference value again, greater than reference value, then sequence of pictures is read in internal memory successively with positive order, and be shown on the peripheral hardware by the VGA/TV interface, feed back to the user; If difference is less than reference value, then sequence of pictures is read in internal memory successively with reverse order, and is shown on the peripheral hardware.If difference continues greater than reference value, then program is extracted music output more easily; If difference continues less than reference value, then program changes into and extracts nervous music output.The connected mode that fades over is adopted in the switching of two kinds of music, makes the multimedia feedback of whole training process keep coherent and smooth and easy.
All recreation all store with certain tactic sequence of pictures.Carry out in the process in recreation, compare,, the user is fed back in real time with the order that comparative result decision motion picture and music read with the β wave power spectral density value and the pre-set threshold that calculate in real time.
The embodiment of multimedia brainwave feedback children learning and training method:
At first, wear electrode for the children of training, central area collection point, ear-lobe reference point and place between the eyebrows earth point that the helmet of this instrument for training just, 3 brain wave acquisition electrodes are attached to center, the children crown are respectively gathered brain wave, and instrument for training is connected display or televisor;
Start instrument for training, selecting recreation and difficulty is 5 (threshold values), begins to play learning game, and the content and the knowledge of textbook of recreation interrelate, and study, amusement and training are combined together;
At this moment, children's EEG signals is through the acquisition electrode input, and the potential difference (PD) of getting between central area collection point and the ear-lobe reference point is amplified through computing, the A/D analog to digital conversion becomes digital signal, after isolating, photoelectricity carries out filtering again by the FFT computing, carry out the extraction computing of DTMF afterwards, each second extracted the once real-time wave amplitude and the frequency values of each wave band, calculate power spectrum density with this, extract the beta band power spectral density value of calculating brain wave 13-30Hz and (give ADC after the filtering of process power frequency again, ADC isolates the filtering of laggard line number word through photoelectricity after it is converted to digital signal in real time, deliver to MCU then, MCU carries out frequency inverted by calling system software to Wave data, becoming β wave power spectral density changes) drive animation and play, through the VGA/TV interface with audio interface outputs to display/TV and earphone feeds back to children.After children receive the feedback information of video and audio frequency, the brain self-control, the E.E.G of variation is converted to power spectral density value in real time through instrument, and drives the animation real-time change, and feedback outputs to the last demonstration of display/TV in real time in real time.
When the difference with last second power spectral density value was more than or equal to threshold value 5 in one second behind children's the β ripple, recreation is to the trend development of triumph, when children's β wave power spectral density changing value continues to maintain on the threshold value, then play to reach and win, and demonstrate the award of certain mark; If β wave power spectral density changing value is lower than threshold value, recreation is then carried out to the aspect of failure, and deducts certain mark as punishment.In time rating, the content of utilizing recreation constantly to change provides audiovisual to stimulate, import user's brain into,, cause the change of its cognitive activities to the continuous oblatio of user, the continuous variation of corresponding brain wave is arranged then, numerical value situation according to the power spectral density value of E.E.G causes the continuous variation of animated content again, and new stimulation constantly is provided, brain wave also correspondingly constantly changes, and influences the change of cognitive activities.By the training process of this brainwave feedback, make the habitual gradually β of the generation ripple of children, promptly notice is concentrated, thereby reaches the purpose of feedback training.
The multimedia learning recreation provides audiovisual to stimulate for the animation that utilizes the special establishment of multimedia technology to children, the content and the knowledge of textbook of animation interrelate, for example: with regard to a subtraction mathematical problem, 5 birds that stop have in the tree been described in stimulating animation, notice is concentrated in training process, when the power spectral density value difference exceeds preset threshold, the sword that sends just can be hit a bird wherein, (having reached the purpose of E.E.G training), at this moment one application topic correspondingly can appear: 5 birds are arranged on the tree, penetrated one by the hunter, also surplus how many birds on the tree? if want to carry out the training of next content, just must answer questions this exercise question (purpose that combines with textbook that reaches) earlier.So just, study, amusement and training are combined together.
As multimedia feedback sources, the feedback animation has selected to meet the game mode of Chinese education background and compatriots' custom, (threshold value varies with each individual when the power spectrum difference of children β ripple reaches a certain threshold value, processing module can converse by gathering behind the band top electrode, also can carry out the setting of threshold value) by trainer oneself, recreation just can be open to the custom and be walked toward the direction of triumph in other words, otherwise then not.
Claims (5)
1, a kind of multimedia brainwave feedback children learning instrument for training is characterized in that being provided with:
Brain wave acquisition processing module: form by the brain wave acquisition electrode, collection of simulant signal circuit, amplifying circuit of analog signal, analog to digital conversion circuit and the photoelectric isolating circuit that are electrically connected successively, acquisition electrode has 3, the central area collection point and ear-lobe reference point, the forehead that are attached to center, the crown respectively hit exactly earth point, forehead center earth point has tap collection point and reference point behind resistance along separate routes, gets the potential difference (PD) input collection of simulant signal circuit between central area collection point and the ear-lobe reference point;
Central control system: be implanted with the embedded system that the control application software that comprises recreation has been installed, recreation exports audio frequency to and the video output module arrives audio frequency and video-unit at last; Operation by system software, the eeg signal data that collect are carried out filtering by fft algorithm get the 1-34HZ wave band, adopt Goertzel algorithm and multiwindow method to calculate the power spectral value of brain wave frequency at the β of 13-30Hz ripple, and the difference that calculates current power spectrum value and last temporal power spectrum value be used as the playing driving of feedback, set a threshold value during recreation beginning, when this power spectrum difference meets or exceeds preset threshold, recreation is just carried out toward the aspect of triumph or advantage, otherwise then carry out in the opposite direction, will in external connection display equipment, show by the Display part;
The video output module carries out analog-converted with video signal;
The audio frequency output module, the output of control audio signal;
Video-unit is connected with the video output module by video interface;
Audio devices is connected with the audio frequency output module by audio interface;
Storage unit plays the information stores effect;
The work that switch element, the power supply supply by control entire circuit plate come control circuit board whether;
Each module and port, interface, storage unit, switch element respectively with central control system by bus transfer with accept instruction;
Circuit board is powered by a power module.
2, multimedia brainwave feedback children learning instrument for training according to claim 1 is characterized in that: described power supply carries out that the amplifier section for the brain wave acquisition processing module provides independent power supply after the electrical isolation.
3, multimedia brainwave feedback children learning instrument for training according to claim 2, it is characterized in that: described central control system is circumscribed with the data input/output port, and it provides usb interface and rs232 serial ports, is used for communicating by letter with external USB flash disk or PC.
4, multimedia brainwave feedback children learning instrument for training according to claim 3, it is characterized in that: described central control system is circumscribed with network interface, be connected with external PC by this interface, can debug and come related transmitting information the software program on the central control system; Described video-unit is computer monitor and televisor, is connected with central control system with the TV interface by the VGA interface respectively.
5, multimedia brainwave feedback children learning instrument for training according to claim 4, it is characterized in that: described brain wave acquisition processing module acquisition electrode is fixed on the central area collection point of center, the inboard corresponding Ziren crown respectively of a helmet, ear-lobe reference point and forehead center earth point, the potential difference (PD) of getting between central area collection point and the ear-lobe reference point is carried out the signal amplification by the AD620 chip, be transferred to the Ads8320 chip and carry out analog to digital conversion, the analog signal conversion of amplifying is become digital signal, the AD SCLK of chip Ads8320, AD SDO and AD NCS port are connected with corresponding port in the ADuM2400 chip, digital signal after the conversion is carried out photoelectricity isolate in ADuM2400, the MCU that is transferred to central control system by bus EGPIO3 carries out computing then;
Central control system: its ARM9 platform transplantation has eCos operating system and driver and biofeedback software;
The audio frequency output module is the UDA1341TS chip, among the MCU music instruction is arrived this control chip by bus transfer, and this control chip is by external audio frequency device bluetooth earphone or loudspeaker playing back music;
The video output module carries out analog-converted by the 74hc04 chip with digital signal, by VGA, TV control chip U15 VGA7005CTV, video information is shown by external video-unit computer monitor or TV then;
Data transmission port USB﹠amp; RS232 part, this part provide USB and RS232 interface, the connection of MAX3232 chip controls RS232 serial ports, and the information transmission of USB HOST control USB interface is used for communicating by letter with external USB flash disk or PC;
Network interface Ethernet part works by the RTL8201 chip, in the debug circuit plate, be connected with external PC by this interface during software, come related transmitting information by grid line, can debug and related transmitting information the software program on the central control system;
Storage unit is that the K912808U0C chip is connected with MCU by bus;
The software systems of this instrument for training are by constituting with lower module:
---brain electric treatment module, accept the signal behind ADC conversion and digital filtering, and carry out power spectrum density and convert, extract the real-time wave amplitude and the frequency values of beta band at last, thereby calculate power spectral value;
---the recreation driver module, the power spectrum density changing value of the real-time beta band that obtains with brain electric treatment module is as the controlled variable of game process, the animation that utilizes the special establishment of multimedia technology is changed according to the power spectral value of beta band, and the animation of variation is by video and audio frequency output.
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2008
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