CN105962934B - Brain wave radio transmitting method - Google Patents
Brain wave radio transmitting method Download PDFInfo
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- CN105962934B CN105962934B CN201610565246.2A CN201610565246A CN105962934B CN 105962934 B CN105962934 B CN 105962934B CN 201610565246 A CN201610565246 A CN 201610565246A CN 105962934 B CN105962934 B CN 105962934B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
- A61B5/0006—ECG or EEG signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/291—Bioelectric electrodes therefor specially adapted for particular uses for electroencephalography [EEG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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Abstract
In order to improve the wireless reliability of brain wave wireless collection scheme, solid foundation and reliable guarantee are provided for the accurate processing of eeg signal, the present invention provides a kind of brain wave radio transmitting methods, including initial eeg signal sensor array and auxiliary eeg signal sensor array is arranged, and by multiple duty cycles since zero moment T0, determine the working condition of each eeg signal sensor, and the amplification factor of each programmable amplifier is set in the second moment T2 in turn and etc..The auxiliary eeg signal sensor created according to the present invention, the eeg signal that combining wireless transmission unit is sent, can high speed, efficiently handle the eeg signal that must handle, so that the signal-to-noise ratio of eeg signal to be analyzed is improved 30%-40%, eeg signal acquisition reliability is made averagely to improve about 40%-55%.
Description
Technical field
The present invention relates to eeg signal acquisition techniques, more particularly, to a kind of brain wave radio transmitting method.
Background technique
Eeg signal (EEG) is a kind of typical bioelectrical signals, is the total of cerebral cortex cranial nerve cell electrical activity
Body reflection, is one of important physiological parameter of clinical detection and cognition section wherein containing a large amount of physiology and pathological information
The important means of the area researches such as, brain-computer interface and alertness.Since traditional eeg signal acquisition equipment is all huger,
It is not easy to the in due course acquisition of eeg signal, therefore the research and development of wireless remote eeg signal acquisition equipment are of great significance.
Existing data acquisition scheme is familiar with the position that acquiring brain waves electrode is arranged although not needing user,
There are the factors of some obstruction eeg signal acquisition reliabilities for wireless signal transmission therein itself.For example,
CN201410166176.4 discloses a kind of acquiring brain waves transfer approach, comprising: acquisition leads eeg signal；It will be described more
It leads eeg signal and is converted into optical signal；It receives the optical signal and converts the first telecommunications for the optical signal received
Number；First electric signal is subjected to digitized processing to obtain the second electric signal；By second electric signal transmission to acquisition
Host.Although it can solve the problems, such as that a certain extent wireless data link is unstable, due to photoelectricity/electric light letter
Number conversion cause the distortion of original signal.On the other hand, since the signal-to-noise ratio of eeg signal is very low, jam-to-signal
The amplitude of valid data is bigger, so that signal is fallen into oblivion by noise substantially, separating difficulty is very big, and the noise being related to does not comprise only
It is interfered caused by head movement, facial muscle movements, further includes the interference etc. that power-supply fluctuation causes.
Therefore, it in the environment of brain wave sensor is wirelessly connect with data processing end, mentions as wide as possible
The acquisition reliability of high eeg signal and the signal-to-noise ratio of eeg signal are that the project solved is endeavoured always in this field.
Summary of the invention
In order to improve the wireless reliability of brain wave wireless collection scheme, for eeg signal it is accurate processing provide it is solid
Basis and it is reliable guarantee, the present invention provides a kind of brain wave radio transmitting methods, comprising:
(1) eeg signal is acquired using multiple eeg signal sensors；
(2) the first enhanced processing is carried out to collected signal using programmable amplifier, and passes through wireless transmission unit
It is transmitted wirelessly to eeg signal controller；
(3) signal that the eeg signal controller is received according to different moments, passes through the wireless transmission unit
To the eeg signal sensor feedback amplification factor, collected signal is carried out at the second amplification for programmable amplifier
Reason, and prompt information is provided when the amplification factor fed back meets preset condition.
Further, the step (2) includes:
(21) multiple programmable amplifiers are set, and each programmable amplifier and each eeg signal sense
Device connects correspondingly, is exported with amplifying each eeg signal sensor according to the amplification factor of each programmable amplifier
Signal；
(22) multiple counters are set, and the individual count device and the programmable amplifier correspond, individual count
The count value of device is the serial number of fixed value and the corresponding programmable amplifier of the fixed value；
(23) wireless transmission unit is set, the output end of the wireless transmission unit and each programmable amplifier with
And the output end of individual count device is connected；
(24) wireless transmission unit exports the programmable amplifier signal and with the programmable amplifier
The count value of corresponding counter is wirelessly transmitted to eeg signal controller in the form of the first array.
Further, the step (3) includes:
(31) by multiple duty cycles since zero moment T0, the work shape of each eeg signal sensor is determined
State, and the amplification factor of each programmable amplifier is set in the second moment T2 in turn, wherein 1 duty cycle includes
The operation of step (24)；
(32) when the amplification factor for each programmable amplifier being arranged in the second moment T2 meets preset condition
When, issuing indicates that user should improve the prompt information of current detection brain wave detection environment, such as user should stablize
Mood, the more quiet place of selection carry out brain wave detection etc..
The step (31) further comprises:
(311) in zero moment T0, it is assumed that the amplification factor of each programmable amplifier is the set of the first amplification factor；
(312) after the zero moment T0, by multiple duty cycles, wherein 1 duty cycle includes step
(24) operation, when reaching the first moment T1, eeg signal controller is stored in zero moment T0 and subsequent described more
Each brain wave in initial eeg signal sensor array and auxiliary eeg signal sensor array in a duty cycle
The amplified output valve of programmable amplifier corresponding thereto is passed through in the output of signal transducer, and according to these output valves
Determine the working condition of each eeg signal sensor, then according to the eeg signal working sensor state, setting with
The amplification factor of the corresponding programmable amplifier of each eeg signal sensor is the set of the second amplification factor；
(313) the second moment T2 reached after undergoing multiple duty cycles again after the first moment T1, the brain wave
The times magnification of each programmable amplifier is arranged according to the work state information of eeg signal sensor in signal controller
Number, is allowed to constant within next period equal with T0 to T2, then repeatedly step (311)-(313), until receiving
Until eeg signal acquires termination signal, wherein T2 > T1.
Further, the eeg signal sensor uses dry electrode sensor.
Further, the dry electrode sensor uses the ThinkGear AM chip of U.S. Neurosky company.
Further, the amplification factor of the programmable amplifier is 0-64.
Further, it is communicated between the wireless transmission unit and eeg signal controller by Bluetooth chip.
Further, the step (24) further comprises: the wireless transmission unit described is compiled in t moment by each
The count value of the signal of journey amplifier output and counter corresponding with each programmable amplifier is with N number of first number
The form of group, and the first array of the signal exported including the programmable amplifier of non-zero is wirelessly transmitted to brain
Electric wave signal controller.
Further, 2-5 duty cycle is spaced between first moment T1 and the zero moment T0.
Further, the preset condition is the amplification factor for the programmable amplifier being arranged in the second moment T2
In, it is more than 30% for 0 ratio.
Further, the eeg signal working sensor state includes working properly and operation irregularity two states.
Further, when the eeg signal working sensor state is state working properly, setting and each brain
The amplification factor of the corresponding programmable amplifier of electric wave signal sensor is an amplification in the set of the first amplification factor
Multiple；Otherwise it is set to 0.
The beneficial effect comprise that
(1) the auxiliary eeg signal sensor created according to the present invention, the brain wave that combining wireless transmission unit is sent
Signal, can high speed, efficiently handle the eeg signal that must handle, wherein the eeg signal according to independent research can
It can make to be analyzed by property Processing Algorithm compared to the various algorithms of the directly prior art of the processing including noise signal
The signal-to-noise ratio of eeg signal improves 30%-40%；
(2) which brain electricity can be periodically identified based on user's information and real-time collected eeg signal
The collected eeg signal of wave signal transducer is useful signal；
(3) it can be fed back according to the processing result of eeg signal, so as to adjust the brain electricity for sending eeg signal
The working condition of wave signal transducer, so that eeg signal treatment effeciency is able to significantly increase；
(4) sensor of acquisition eeg signal according to the real-time status of eeg signal, can adaptively be changed
Working condition changes so that dynamic occurs for the power consumption of the Bluetooth communication chip of transmission eeg signal, is conducive to reduce brain
Power consumption needed for electric wave signal acquires, thus the work longevity of wireless transmission unit when improving eeg signal acquisition at user
Life.
Detailed description of the invention
Fig. 1 shows the flow diagram of brain wave radio transmitting method according to the present invention.
Specific embodiment
As shown in Figure 1, a kind of brain wave radio transmitting method of the invention, comprising:
(1) eeg signal is acquired using multiple eeg signal sensors；Specifically, the step includes:
Firstly, initial eeg signal sensor array is arranged: the i × j eeg signal sensors are arranged to i
Row × j arranges (for example, as sensor array usually used, for covering user head in the prior art), wherein i
With the natural number that j is greater than 1, wherein j column eeg signal sensor indicate eeg signal sensor be arranged on along
The eeg signal sensor on the front of user's contouring head to the direction at rear, multiple being electrically connected to each other, i row indicate
Along the eeg signal sensing on the left to the direction of right of user's contouring head, multiple not being electrically connected each other
Device, each column eeg signal sensor passes through signal bus each other and electrical bus links together；Art technology
Personnel should know: on above-mentioned each " column ", the distance between adjacent eeg signal sensor is not identical, removes non-user
Contouring head close to hemispherical.In the present invention, user indicates the object of eeg signal to be collected, and user head refers to
It is the region that user generally wore or dressed dry electrode sensor, such as the region of head hair line.
Secondly, setting auxiliary eeg signal sensor array: the side at front to the rear of measurement user's contouring head
Longest distance L upward, along user headmaxWith shortest distance Lmin；I-th of brain wave letter on jth column
On number sensor, to be towards the direction at user crown center, distancePosition, setting auxiliary
Eeg signal sensor, wherein the auxiliary corresponding with i-th of eeg signal sensor on jth column
Eeg signal sensor is also coupled on the signal bus, LjThe front along user's contouring head is listed in for jth
Length to the direction at rear, " | | " indicate the operation that takes absolute value,Expression takes integer value；
Each brain wave in the initial eeg signal sensor array and auxiliary eeg signal sensor array
Signal transducer is worn over the structure on head by shaping silica gel at suitable user.
If the eeg signal sensor that being located in the initial eeg signal sensor array, the i-th row jth arranged
Output voltage is Vi,j(t), t indicates the temporal information that acquisition is related to.
If the eeg signal sensor pair for being located at the i-th row jth column in the initial eeg signal sensor array
The output voltage for the auxiliary eeg signal sensor answered is V'i,j(t)。
(2) multiple programmable amplifiers are set, and each programmable amplifier and each eeg signal sense
Device connects correspondingly, is exported with amplifying each eeg signal sensor according to the amplification factor of each programmable amplifier
Signal；In this step, in the initial eeg signal sensor array and auxiliary eeg signal sensor array
Each eeg signal sensor be arranged programmable amplifier.
(3) multiple counters are set, and the individual count device and the programmable amplifier correspond, individual count device
Count value be fixed value and the corresponding programmable amplifier of the fixed value serial number；It in this step, is described initial
The eeg signal sensor setting of each of eeg signal sensor array and auxiliary eeg signal sensor array
Counter, to identify the eeg signal sensor in entire initial eeg signal sensor array and auxiliary eeg signal
The serial number in all eeg signal sensors in sensor array, the serial number is in entire initial eeg signal sensor array
It is unique value in all eeg signal sensors in column and auxiliary eeg signal sensor array.For ease of description, will
The total number of eeg signal sensor is denoted as i × j, the auxiliary eeg signal in initial eeg signal sensor array
The total number of eeg signal sensor is denoted as i × j in sensor array, then the initial eeg signal sensor array and
The total number for assisting eeg signal sensor in eeg signal sensor array is 2 × i × j；
(4) wireless transmission unit is set, the output end of the wireless transmission unit and each programmable amplifier with
And the output end of individual count device is connected；
(5) wireless transmission unit exports the programmable amplifier signal and with the programmable amplifier phase
The count value of corresponding counter is wirelessly transmitted to eeg signal controller in the form of the first array；It is according to the present invention
Preferred embodiment, the programmable amplifier may include the programmable resistor of resistance value and instrumentation amplifier, wherein resistance value
Programmable resistor according to the signal that the wireless transmission unit receives for being opened or closed, thus correspondingly generation pair
The signal for inputting the programmable amplifier generates 0 times of amplification (i.e. the programmable amplifier output end non-output signal) or generates root
The amplification of specified multiple is carried out according to the signal that the wireless transmission unit receives.Preferred embodiment in accordance with the present invention, it is described
Then the programmable resistor of resistance value reconnects instrumentation amplifier by D/A converting circuit by digital circuit.
(6) by multiple duty cycles since zero moment T0, the work shape of each eeg signal sensor is determined
State, and the amplification factor of each programmable amplifier is set in the second moment T2 in turn.
The step (6) preferably includes:
(61) in zero moment T0, it is assumed that the amplification factor of each programmable amplifier is the set of the first amplification factor, if
K-th of eeg signal sensor of serial number corresponds to first amplification factor of the connected programmable amplifier in the set
Ak；
(62) after the zero moment T0, by multiple duty cycles, wherein 1 duty cycle includes step (5)
Operation, when reaching the first moment T1, eeg signal controller is stored in zero moment T0 and subsequent the multiple work
Make each eeg signal in the initial eeg signal sensor array and auxiliary eeg signal sensor array in the period
The amplified output valve of programmable amplifier corresponding thereto is passed through in the output of sensor, and is determined according to these output valves
The working condition of each eeg signal sensor, then according to the eeg signal working sensor state, setting with it is each
The amplification factor of the corresponding programmable amplifier of eeg signal sensor is the set of the second amplification factor, if serial number the
Second amplification factor of the corresponding connected programmable amplifier of k eeg signal sensor in the set is A'k；The step
It specifically includes:
Firstly, M duty cycle (for example, M=3) is undergone altogether before to the first moment T1 after being located at zero moment T0,
For the T duty cycle after zero moment T0, wherein T is greater than 1 and T < M, the initial eeg signal sensor array
The output voltage of eeg signal sensor for being located at the i-th row jth column in column isThe initial eeg signal passes
The output of the corresponding auxiliary eeg signal sensor of eeg signal sensor for being located at the i-th row jth column in sensor array
Voltage is
Then, rule of thumb formulaWith
Between relationship, determine the i-th row jth column eeg signal sensor working condition；IfThen think the i-th row jth column
The working condition of eeg signal sensor is state working properly；It otherwise is operation irregularity state, the brain that the i-th row jth is arranged
The amplification factor of the corresponding programmable amplifier of electric wave signal sensor is set as A'k, the hereafter eeg signal sensor
Working condition method of determination are as follows: judgement
(63) the second moment T2 (for example, P=6) reached after undergoing P duty cycle again after the first moment T1, institute
Eeg signal controller is stated according to the work state information of eeg signal sensor, each programmable amplifier is set
Amplification factor, be allowed to constant within next period equal with T0 to T2, then repeatedly step (61)-(63), until
Until receiving eeg signal acquisition termination signal, wherein T2 > T1, and P is the positive integer times of M.Specifically, the step packet
It includes:
If calculating the work of above-mentioned i-th row jth column eeg signal sensor every M duty cycle before reaching T2
State, if reach the second moment T2, the working condition of the i-th row jth column eeg signal sensor is state working properly
Number withBetween size relation, if the former be equal to the latter, by the i-th row jth arrange eeg signal sensor
The amplification factor of corresponding programmable amplifier reverts to the amplification factor stored at the T0 moment；Otherwise, this eeg signal is passed
The amplification factor of the corresponding programmable amplifier of sensor is set as 0；
During the amplification factor of above-mentioned setting programmable amplifier, eeg signal controller is single to the wireless transmission
Member sends such second array, which includes multipair data, and each pair of data include following two parts data:
(1) first part's data: eeg signal sensor number；
(2) second part data: the corresponding programmable amplifier of corresponding eeg signal sensor is numbered with this
Amplification factor.
After the wireless transmission unit receives above-mentioned second array, each of these pair of data are carried out respectively as follows
Processing: according to wherein first part's data, it is corresponding that eeg signal sensor corresponding with first part's data is set
The amplification factor of programmable amplifier is the second part data in a pair of of data.
When the amplification factor for each programmable amplifier being arranged in the second moment T2 meets preset condition, hair
Indicate that user should improve the prompt information of current detection brain wave detection environment out.It is described pre- according to preferred embodiment
It is more than 30% for 0 ratio if condition is in the amplification factor for the programmable amplifier being arranged in the second moment T2.
Preferably, the eeg signal sensor uses dry electrode sensor.
Preferably, the dry electrode sensor uses the ThinkGear AM chip of U.S. Neurosky company.
Preferably, the amplification factor of the programmable amplifier is 0-64.
Preferably, it is communicated between the wireless transmission unit and eeg signal controller by Bluetooth chip.
Preferably, the step (5) further comprises: the wireless transmission unit will be each described programmable in t moment
The count value of the signal of amplifier output and counter corresponding with each programmable amplifier is with N number of first array
Form, and by the first array of the signal exported including the programmable amplifier of non-zero be wirelessly transmitted to brain electricity
Wave signal controller.
Preferably, 1 duty cycle includes the operation of a step (5).
2-5 duty cycle is spaced between first moment T1 and the zero moment T0.
Preferably, the Bluetooth chip uses the BLUENRG-MS chip of TI company.
Preferably, the eeg signal working sensor state includes working properly and operation irregularity two states.
Preferably, when the eeg signal working sensor state is state working properly, setting and each brain electricity
The amplification factor of the corresponding programmable amplifier of wave signal transducer is a times magnification in the set of the first amplification factor
Number；Otherwise it is set to 0.
Above for the purpose that narration made by presently preferred embodiments of the present invention is to illustrate, and it is not intended to limit essence of the invention
Really it is disclosed form, learns and make an amendment or change to be possible based on above introduction or from the embodiment of the present invention
, embodiment is to explain the principle of the present invention and those skilled in the art being allowed to exist with various embodiments using the present invention
It is selected in practical application and narration, technical idea attempt of the invention is determined by claim and its equalization.
Claims (7)
1. a kind of brain wave radio transmitting method, comprising:
(1) eeg signal is acquired using multiple eeg signal sensors；It is provided with initial eeg signal sensor array
Column: being arranged to i row × j for the i × j initial eeg signal sensors and arrange, and wherein i and j is the natural number greater than 1,
Wherein j, which arranges initial eeg signal sensor, indicates that eeg signal sensor is arranged on along before user's contouring head
Just to the eeg signal sensor on the direction at rear, multiple being electrically connected to each other, the initial eeg signal sensor sheet of i row
Show on the left to the direction of right along user's contouring head, the multiple eeg signal sensing not being electrically connected each other
Device；Be arranged auxiliary eeg signal sensor array: measurement user's contouring head front to the direction at rear on, along
The longest distance L on user headmaxWith shortest distance Lmin；I-th of initial eeg signal sensor on jth column
On, to be towards the direction at user crown center, distancePosition, setting auxiliary brain wave letter
Number sensor, wherein the auxiliary brain corresponding with the initial eeg signal sensor of i-th on jth column is electric
Wave signal transducer is also coupled on the signal bus, LjThe front along user's contouring head is listed in rear for jth
Length on the direction of side, " | | " indicate the operation that takes absolute value,Expression takes integer value；
(2) the first enhanced processing is carried out to collected signal using programmable amplifier, and wireless by wireless transmission unit
Ground is sent to eeg signal controller；
(3) signal that the eeg signal controller is received according to different moments, by the wireless transmission unit to brain
Electric wave signal sensor feedback amplification factor carries out the second enhanced processing to collected signal for programmable amplifier, and works as
The amplification factor fed back provides prompt information when meeting preset condition；
The step (2) includes:
(21) multiple programmable amplifiers are set, and each programmable amplifier and each eeg signal sensor one are a pair of
It connects with answering, to amplify the signal of each eeg signal sensor output according to the amplification factor of each programmable amplifier；
(22) multiple counters are set, and each counter and the programmable amplifier correspond, individual count device
Count value is the serial number of fixed value and the corresponding programmable amplifier of the fixed value；
(23) be arranged wireless transmission unit, make the wireless transmission unit and each programmable amplifier output end and
The output end of individual count device is connected；
(24) wireless transmission unit exports the programmable amplifier signal and opposite with the programmable amplifier
The count value for the counter answered is wirelessly transmitted to eeg signal controller in the form of the first array；Step (3) packet
It includes:
(31) by multiple duty cycles since zero moment T0, the working condition of each eeg signal sensor is determined,
And the amplification factor of each programmable amplifier is set in the second moment T2 in turn, wherein 1 duty cycle includes step
Suddenly the operation of (24)；
(32) when the amplification factor for each programmable amplifier being arranged in the second moment T2 meets preset condition, hair
Indicate that user should improve the prompt information of current detection brain wave detection environment out；
It is characterized in that, the step (31) further comprises:
(311) in zero moment T0, it is assumed that the amplification factor of each programmable amplifier is the set of the first amplification factor, if serial number
It is A for first amplification factor of the corresponding connected programmable amplifier of k-th of eeg signal sensor in the setk；
(312) after the zero moment T0, by M duty cycle, wherein 1 duty cycle includes the behaviour of step (24)
Make, when reaching the first moment T1, eeg signal controller is stored in zero moment T0 and subsequent the M duty cycle
Each eeg signal sensor in interior initial eeg signal sensor array and auxiliary eeg signal sensor array
Output by the amplified output valve of programmable amplifier corresponding thereto, and determine each brain electricity according to these output valves
The working condition of wave signal transducer, then according to eeg signal working sensor state, setting and each eeg signal
The amplification factor of the corresponding programmable amplifier of sensor is the set of the second amplification factor；If k-th of brain wave of serial number
Second amplification factor of the corresponding connected programmable amplifier of signal transducer in the set is A'k；The step (312) is specific
Include:
Firstly, M duty cycle is undergone altogether before to the first moment T1 after being located at zero moment T0, M=3, when for the 0th
The T duty cycle after T0 is carved, wherein T is greater than 1 and T < M, being located in the initial eeg signal sensor array
The output voltage of initial eeg signal sensor of i-th row jth column isThe initial eeg signal sensor array
The output electricity of the corresponding auxiliary eeg signal sensor of initial eeg signal sensor for being located at the i-th row jth column in column
Pressure is
Then, rule of thumb formulaWithIt
Between relationship, determine the i-th row jth column initial eeg signal sensor working condition；IfThen think the i-th row jth column
The working condition of initial eeg signal sensor is state working properly；Otherwise it is operation irregularity state, the i-th row jth is arranged
The amplification factor of the initial corresponding programmable amplifier of eeg signal sensor be set as A'k, the hereafter initial brain wave
The working condition method of determination of signal transducer are as follows: judgementIt is whether true；
(313) the second moment T2 reached after undergoing P duty cycle again after the first moment T1, the eeg signal control
Device processed is according to the work state information of eeg signal sensor, and P is the positive integer times of M, wherein T2 > T1, and each compile is arranged
The amplification factor of journey amplifier as next and T0 to T2 when moment zero moment the first of each programmable amplifier to put
Big multiple；
(314) step (311)-(313) are repeated, until receiving eeg signal acquisition termination signal.
2. brain wave radio transmitting method according to claim 1, which is characterized in that eeg signal sensor is using dry
Electrode sensor.
3. brain wave radio transmitting method according to claim 2, which is characterized in that the dry electrode sensor is using beauty
The ThinkGear AM chip of Neurosky company, state.
4. brain wave radio transmitting method according to claim 1, which is characterized in that the amplification of the programmable amplifier
Multiple is 0-64.
5. brain wave radio transmitting method according to claim 1, which is characterized in that the wireless transmission unit and brain electricity
It is communicated between wave signal controller by Bluetooth chip.
6. brain wave radio transmitting method according to claim 1, which is characterized in that the step (24) is further wrapped
Include: signal that the wireless transmission unit exports each programmable amplifier and with each programmable amplifier
The count value of corresponding counter is wirelessly transmitted to eeg signal controller in the form of N number of first array, including non-
First array of the signal of zero programmable amplifier output.
7. brain wave radio transmitting method according to claim 1, which is characterized in that the preset condition is at second
It is more than 30% for 0 ratio in the amplification factor for the programmable amplifier being arranged when carving T2.
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