CN2229793Y - Portable and digital electroencephalograph instrument - Google Patents

Portable and digital electroencephalograph instrument Download PDF

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CN2229793Y
CN2229793Y CN 95221127 CN95221127U CN2229793Y CN 2229793 Y CN2229793 Y CN 2229793Y CN 95221127 CN95221127 CN 95221127 CN 95221127 U CN95221127 U CN 95221127U CN 2229793 Y CN2229793 Y CN 2229793Y
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陈轶
陈晔
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Abstract

The utility model relates to a portable type digital electroencephalograph instrument. One to eight driving circuits are composed of 16 common-reference driving preamplifiers (1), a multi-channel switching controller (2), a main amplifier (3), a photoelectric isolation and data acquisition device (4) and a notebook computer (5), and the driving circuits are A3 amplifiers. 9-16 driving circuits are A4 amplifiers. The multi-channel switching controller is composed of two to eight simulation selectors IC1 and IC2 and an electronic switch. The main amplifier is composed of a triple-pole amplifier. The utility model can be arranged bedsides and operating rooms, and can be used in house call situations. The utility model uses a battery power supply which can be stored, and thus the utility model is convenient to carry.

Description

The portable digital electroencephalograph
This utility model relates to a kind of portable digital electroencephalograph, also is a kind of neuroelectricity physiology instrument that brain function is checked that is used for, and belongs to technical field of medical.
Traditional electroencephalograph (EBG) be a kind of in the special electromagnetic screened room record cerebral cortex difference equipment that spontaneous potential changes that leads, more this potential change is traced on paper, its major defect is: 1. bulky, move very inconvenience; 2. must manipulate in that specific electromagnetic shielding is indoor; 3. the curve of electroencephalogram potential change can only be described and be recorded on the paper, can not store, and protocol paper deposit that to occupy the space bigger.
In recent years, development along with the computer numeral system, adopt disk or CD can write down the electroencephalogram curve, and preserved for a long time, for example: the PL of Denmark-EFG type does not have the paper electroencephalograph, and it shows that volume is about 42 * 40 * 40cm, and the Voyaeur of U.S. N.colef company does not have the paper electroencephalograph and solved the 3rd above-mentioned shortcoming, but do not solve bulky shortcoming, and still must be in the indoor use of electromagnetic shielding.
The purpose of this utility model is that a kind of portable digital electroencephalograph will be provided, it can overcome above-mentioned shortcoming, this electroencephalograph is total to referenced drive preamplifier, multiple switch controller, main amplifier by 16 roads, photoelectricity buffer data acquisition device and notebook computer are formed, this instrument volume is little, is easy to carry, and can write down the variation of cerebral cortex spontaneous potential, and analyze, practical and reliable.
The purpose of this utility model is achieved in that
Electroencephalograph mainly is total to the referenced drive preamplifier by 16 roads, multiple switch controller, and main amplifier, photoelectricity buffer data acquisition device and notebook computer are formed;
16 roads altogether referenced drive preamplifier (1) are divided into each totally one reference driver circuit of 28 roads, and wherein the drive circuit in 1-8 roads is A 3Amplify suitablely, the drive circuit in 9-16 roads is A 4Amplifier, resistance R 4One termination amplifier A 414 ends, another termination 13 ends, resistance R 3One end and R 4Be parallel to 13 ends, the other end is connected to drive circuit A 3/ A 41 end of amplifier.Resistance R 11Be connected to A 31 end of amplifier and 2 ends, resistance R 10One end and resistance R 11Be connected to 2 ends, other end ground connection, amplifier A 33 terminating resistor R 9, another termination capacitor C 5An end, parallel resistance R simultaneously 8, resistance R 8Other end connecting resistance R 12, simultaneously again and be attached to resistance R 1, R 12Other end ground connection, resistance R 5With resistance R 4Be connected in A 114 ends of amplifier, and the other end and resistance R 6Join, be parallel to capacitor C again 2One end, C 2Another termination amplifier A 29 ends and 8 ends, resistance R 6The other end be connected to A again 210 ends be parallel to capacitor C again 3Back ground connection, capacitor C 4Other end connecting resistance R 7Back ground connection.
Multiple switch controller is by 28 road analogue selector IC 1And IC 2Electronic switch control circuit is formed, analogue selector IC 111 ends, 10 ends, 9 ends and IC 211,10,9 ends join, ch1, ch2, ch3, ch4, ch5, ch6, ch7, ch8 successively with IC 113,14,15,12,1,5,2,4 ends join, and ch9, ch10, ch6, ch12, ch13, ch19, ch15, ch16 also successively with IC 213,14,15,12,1,5,2,4 each the end join IC 1And IC 216 ends respectively connect+9V 8 ends, 7 terminations-9V, and 3 ends mutual 2 are connected to A after connecing 512 ends, IC 1And IC 26 be terminated at IC 410 ends, IC 16 ends and IC 29 ends, 8 ends join, be connected to chip IC again 314 ends, and IC 211 ends, 10 ends, 9 be terminated at IC 311,12,13 ends, IC 38 terminations-9V, 10 ends and 16 ends are parallel to+9V, 15 are terminated at IC 54 ends, IC 56 ends, 5 end parallel connections after again with capacitor C 6, resistance R 12Parallel connection is connected to-9V again, again with diode D 1Negative pole joins, D 1Positive pole and resistance R 37Be connected to IC after joining 611 ends, be connected in simultaneously IC again 39 ends.
In the main amplifier circuit, resistance R 14One termination reversed feedback amplifier A 514 ends, another termination 13 ends, resistance R 14An one end resistance R in parallel 13Back ground connection, A 512 termination IC of amplifier 13 ends, 14 be terminated at IC 85 ends; IC 84,5,6,10,11 terminations-9V, 4 termination amplifier A 610 ends, A 69 termination IC 415 ends, IC 89 terminating resistor R 18After connect-9V, connect simultaneously K switch again 1-2, be connected to+be connected to IC again behind the 9V 416 ends, simultaneously again through K switch 1-2Be connected to IC 410 ends, be parallel to resistance R 19After meet-9V IC again 91 end parallel resistance R 21, R 22Back ground connection, 2 ends again with resistance R 20, R 21Parallel connection, resistance R 20The other end is connected to operational amplifier A 68 ends, be parallel to operational amplifier A simultaneously 75 ends, A 76 termination IC 1014 ends, 16 ends and K switch 1-1Join, be parallel to resistance R with 11 ends again 13After meet-9V IC 1012 terminating resistor R 14An end be parallel to operational amplifier A again 83 ends, A 81 end and 2 ends join parallel resistance R simultaneously 26Be connected to photoelectricity again and isolate the digital collection device.
Photoelectricity is isolated the photoisolator J of harvester 2, its diode D 4Anodal connecting resistance R 28, resistance R 27With R 28Parallel connection is again with R 26Join resistance R 27Another termination+9V, audion BG 2Colelctor electrode and photoelectricity isolated tube J 3Transistor emitter join, and be parallel to operational amplifier A 92 ends, amplifier A 92 ends connect capacitor C again 7, 1 end also connects capacitor C 7Other end adjustable resistance R in parallel again 14, be connected to resistance R more jointly 29, resistance R 29And R 31Be connected in diode D 5Positive pole, audion BG 3Colelctor electrode again with resistance R 31Parallel connection is again with resistance R 32Be connected to+9V resistance R after the parallel connection 32The other end and rheostat W 2Join, be connected to resistance R again 23, again with resistance R 30With audion BG 2The emitter stage parallel connection after be connected to-9V A 93 ends also connect and become resistance along W 2, A 91 be terminated at A 1, 5 ends, 7 ends again negative feedback be connected to 6 ends, 7 ends meet IC simultaneously again 1113 ends, IC 1110 termination variable resistance W 2, 12 termination variable resistance W 4, together in parallel with 8 ends again, 1 end is+5V that 7 ends+15V, 11 ends are-12V that 19 and 20 ends join, and join with 16 ends again.
Fig. 1 is a digitized electroencephalograph theory diagram.
Fig. 2 is 16 roads referenced drive preamplifier layouts altogether.
Fig. 3 is the multiple switch controller layout.
Fig. 4 is the circuit diagram of main amplifier.
Fig. 5 is a photoelectricity buffer data acquisition device layout.
Now in conjunction with the accompanying drawings the structure of digitized electroencephalograph is described in detail:
By Fig. 2, there are 7 operational amplifiers (model is TL064) in 16 roads referenced drive preamplifier (1) altogether, are example with the 1st road now, are illustrated.
16 roads referenced drive preamplifier (1) altogether are divided into 28 roads, and each is totally one reference driver circuit, and per pass is by 2 operational amplifier A 1And A 2The drive circuit of forming 1-8 roads is A 3Amplifier, the drive circuit A in 9-16 roads 4Amplifier, wherein A 1, A 2-A 3, A 4All be integrated circuit 1/4TL064;
Reversed feedback amplifier A 1, model is TL064, resistance R 4One termination, 14 ends, another termination 13 ends, resistance R 3One end and R 4Be connected to 13 ends, the other end is connected to drive circuit A 3/ A 41 end of amplifier.
Resistance R 11Be connected to A 31 end and 2 ends, resistance R 10One end and resistance R 11Be connected to 2 ends, the other end is connected to ground, A 33 terminating resistor R 9, resistance R 9Another termination capacitor C 5An end, parallel resistance R again simultaneously 8, resistance R 8Other end connecting resistance R 12, simultaneously again and be attached to resistance R 1R 12Other end ground connection.
Resistance R 5With resistance R 4Be connected in A 114 ends of amplifier, resistance R 5The other end again with resistance R 6Join, be connected in capacitor C simultaneously again 2An end, C 2The other end be connected to A again 29 ends of amplifier and 8 ends, resistance R 6The other end be connected to A 210 ends, be parallel to simultaneously capacitor C again 3, back ground connection, capacitor C 4Other end connecting resistance R 7Back ground connection.
By Fig. 3, multiple switch controller (2) is by 28 road analogue selector IC 1And IC 2(model is HC4051), electronic switch control circuit is formed, and control circuit comprises operational amplifier IC 3(model is (HC4520), IC 4～IC 6(model is HC4093), diode D 1(model is 1N4148) and operational amplifier A 4(model is 1/4TL064), photoisolator (model is 4N25).
Analogue selector IC 111 ends, 10 ends and 9 ends respectively with IC 211,10,9 ends join, ch1, ch2, ch3, ch4, ch5, ch6, ch7, ch8 successively with IC 113,14,15,12,1,5,2,4 each end join, same ch9, ch10, ch11, ch12, ch13, ch14, ch15, ch16 respectively successively with IC 213,14,15,12,1,5,2,4 each the end join IC 1And IC 216 ends respectively connect+9V, 8 ends and 7 terminations-9V is connected to A after its 3 end joins mutually 512 ends (Fig. 4), IC 1And IC 26 be terminated at IC 410 ends, IC 16 ends and IC 29 ends, 8 ends join, be connected to the running chip IC again 311,12,13 ends, IC 38 terminations-9V, 10 ends and 16 ends are connected to+9V, and 15 are terminated at IC 54 ends, IC 56 ends, 5 end parallel connections after again with capacitor C 6, resistance R 12, parallel connection is connected to-9V again, simultaneously again with diode D 1Negative pole join D 1Positive pole and resistance R 37Be connected to IC after joining 611 ends, be connected in simultaneously IC again 39 ends, IC 612,13 ends and be attached to A 41 end, A 42 terminating resistor R 35After meet-9V its 3 end ground connection, IC 613 ends, 12 an ends resistance R in parallel again simultaneously 34After be connected to audion (BG in the photoisolator (4N25) 1) emitter stage, its colelctor electrode connects+9V, audion D 2Minus earth, anodal connecting resistance R 36After be connected to the C end of notebook computer, IC again 1And IC 2Be connected to 16 circuit that select 1 road.
By Fig. 4, the generator that main amplifier (3) is sold by three utmost point amplifiers and a standard is formed, wherein A 5Be reversed feedback amplifier, resistance R 14One termination A 514 ends, another termination 13 ends, R 13One end and resistance R 14Be connected in 13 ends, resistance R 13Other end ground connection, A 512 termination IC of amplifier 13 ends, 14 termination IC 85 ends, IC 8, IC 9, IC 10Be electrical switch (model is HC4053), be mainly used in gain-adjusted and selection, IC 83 be terminated at variable resistance W 16End, 10 ends together are connected to-9V 4 termination A again with 1 end, 2 ends after the 11 end parallel connections 610 ends, A 69 be terminated at IC 415 ends, IC 89 terminating resistor R 18Another termination-9V of back, IC simultaneously 89 ends be connected to K switch again 1-2, this K switch 1-22 positions are arranged, and one of them position is connected behind+9V and is connected to IC again 416 ends, simultaneously again through K switch 1-2Connect and IC 410 ends be parallel to resistance R 19After meet-9V IC again 91 end and resistance R 21And R 22Parallel connection, resistance R 22Other end ground connection, IC 92 ends also with resistance R 20And R 21Parallel connection, resistance R 20The other end be connected to A 68 ends, simultaneously again and be attached to A 75 ends, A 76 be terminated at IC 1014 ends, and 16 be terminated at+9V, connects K switch again 1-2X 2The position is again with resistance R 11Parallel connection is connected to IC 1011 ends, resistance R 11Another termination-9V, IC 1012 terminating resistor R 14An end be parallel to simultaneously A again 83 ends, 13 ends and resistance R 14And R 15Parallel connection, resistance R 15Other end ground connection, A 81 end and 2 ends join parallel resistance R again 26Be connected to photoelectricity buffer data acquisition device (4) again.
Diode D 2And D 3Parallel connection, its plus earth, negative pole again with resistance R 15With rheostat W 1Parallel connection, rheostat W 1An end ground connection, resistance R 15The other end again with IC 73 ends join resistance R 16Connect 3 ends, with 1 end, be parallel to capacitor C again 37, IC 72 ends and resistance R 17Join, be connected to capacitor C again 37The other end connect again-9V.IC 72 ends be parallel to simultaneously K switch again 1-1+ 9V, K switch 1-1Have 2 positions.
By Fig. 5, photoelectricity buffer data acquisition device (4) is made up of photoelectricity isolating amplifier circuit and analog-to-digital conversion circuit.
The photoelectricity isolating amplifier circuit is by 2 photoisolators, and model is 4N23,2 operational amplifier A 9, A 10(model is TL064), resistance R 27-R 33Constitute with electric capacity;
Photoisolator J 2Diode D 4Its positive pole and resistance R 28Join resistance R 27With resistance R 28Parallel connection and resistance R 26Join resistance R 27Another termination+9V, J 2Audion BG 2Colelctor electrode and J 3The D of photoisolator 3Transistor emitter joins, and is parallel to operational amplifier A 92 ends, A 92 ends connect a capacitor C again 7, A 91 end also be connected to this capacitor C 7The other end, an adjustable resistance R in parallel again 34, be connected to a resistance R jointly again 29, resistance R 29And R 31Be connected in diode D 5Positive pole, audion BG 3Colelctor electrode again with resistance R 31Parallel connection is again with resistance R 32Be connected to+9V resistance R after the parallel connection 32The other end and rheostat W 2Join, again connecting resistance R 33, again with resistance R 30And audion BG 2The emitter stage parallel connection after be connected to-9V.A 93 ends also be connected to rheostat W 2, A 91 end be connected in A again 105 ends, 7 ends negative feedback again are connected to 6 ends, 7 ends are connected to simultaneously IC again 1113 ends, IC 11With 10 termination variable resistance W 2, 12 termination variable resistance W 4Together in parallel with 8 ends again, 1 end is+5V that 7 ends+15V, 11 ends are-12V that 19 and 20 ends join, and join with 16 ends again.
The operation principle of electroencephalograph is as follows:
1. record
Head those who are investigated connects 16 electrodes, and each is connected each electrode with 1-16 inputs of the common referenced drive preamplifier (1) in 16 roads, and this electrode is a known technology, is therefore no longer set forth the reference edge R of two ear-lobes and preamplifier (1) 1R 2Connect, the spontaneous brain electricity position signal of 16 specific paries of head is total to referenced drive preamplifier (1) from electrode under the control of notebook computer through 16 roads, convert 1 tunnel with the order in 1-16 roads by 16 the tunnel by multiple switch controller, amplify through main amplifier (3) respectively, again through the photoelectricity isolating amplifier circuit, convert analog quantity to digital quantity through analog conversion circuit again, be recorded on notebook computer internal memory or the disk by data/address bus, except depositing in the internal memory, also on the notebook computer display screen, show 16 road EEG signals, the per pass sample rate is 128/s, can gather 3 fens to 130 minute datas, can select as required, at this moment realize the major function of electroencephalograph.
Brain electricity (EEG) electrode is connected and installed (prior art) by international 10/20 system, and the left cerebral hemisphere cortical electrode links to each other with 1-8 road input ch1～ch8 among Fig. 2 respectively, R among left reference electrode (left ear-lobe electrode) and Fig. 2 1Link to each other; The right cerebral hemisphere cortical electrode links to each other with 9～16 road input ch9～ch16 among Fig. 2 respectively, R among right reference electrode (auris dextra hang down electrode) and Fig. 2 2Link to each other.First EEG signals A in Fig. 2 1After amplifying 400 times, through A 2Filtering, under the control of notebook computer in Fig. 3 the multiple tracks analog switch, make 1-16 road signals select one to pass through by ascending order 16, after main amplifier in Fig. 4 (amplification is adjustable) amplifies, through photoelectricity isolating amplifier circuit among Fig. 5, remove the interference of civil power and notebook computer digital circuit to the simulation EEG signals, after 12 analog-to-digital conversion circuits convert analog quantity to digital quantity, deposit notebook computer internal memory (or disk) in, and on the monitor of notebook computer, show 16 brain electricity curves.The per pass signal sampling rate was 128 sampling point/seconds; The per 4 seconds sections of being, every section per pass 512 points, 512 * 16 sampling points, maximum sampling length are 400K.Form 16 frequency spectrums through the EET conversion, calculate power spectrum.Frequency range is 0.5-30Hz; Resolution is 0.5Hz.According to prior art,, be divided into 6 standard frequency bands: (0.5-3.5Hz) with 0.5-30Hz; Q (4-7.5Hz), α 1 (8-10Hz); α 2 (10.5-13Hz), β 1 (13.5-17.5Hz); β 2 (18-30Hz); Calculate each frequency band absolute power.
According to the absolute power level of calculating the cortex known point, press following algorithm computation:
Vx=[∑ Pi/Di]/[∑ 1/Di] wherein Vx be certain x place absolute power interested, Pi be i electrode place (i=1,2 ... 16) calculated absolute power, Di are the distance of i electrode to the x place.
Compared with prior art, the portable digital electroencephalograph has following advantages:
1. volume is little, is easy to carry.
2. strong anti-interference performance, this electroencephalograph can make in non-electromagnetic shielding chamber With, can adopt the power supply of computer, so not be subjected to the interference effect of AC power electrical network.

Claims (4)

1. a portable digital electroencephalograph is characterized in that electroencephalograph mainly is total to referenced drive preamplifier (1) by 16 roads, multiple switch controller (2), and main amplifier (3), photoelectricity buffer data acquisition device (4) and notebook computer (5) are formed;
16 roads altogether referenced drive preamplifier (1) are divided into each totally one reference driver circuit of 28 roads, and wherein the drive circuit in 1-8 roads is A 3Amplifier, the drive circuit in 9-16 roads are A 4Amplifier, resistance R 4One termination amplifier A 414 ends, another termination 13 ends, resistance R 3One end and R 4Be parallel to 13 ends, the other end is connected to drive circuit A 3/ A 41 end of amplifier.Resistance R 11Be connected to A 31 end of amplifier and 2 ends, resistance R 10One end and resistance R 11Be connected to 2 ends, other end ground connection, amplifier A 33 terminating resistor R 9, another termination capacitor C 5An end, parallel resistance R simultaneously 8, resistance R 8Other end connecting resistance R 12, simultaneously again and be attached to resistance R 1, R 12Other end ground connection, resistance R 5With resistance R 4Be connected in A 114 ends of amplifier, and the other end and resistance R 6Join, be parallel to capacitor C again 2One end, C 2Another termination amplifier A 29 ends and 8 ends, resistance R 6The other end be connected to A again 210 ends be parallel to capacitor C again 3Back ground connection, capacitor C 4Other end connecting resistance R 7Back ground connection.
2. electroencephalograph according to claim 1 is characterized in that: multiple switch controller (2) is by 28 road analogue selector IC 1And IC 2Electronic switch control circuit is formed, analogue selector IC 111 ends, 10 ends, 9 ends and IC 211,10,9 ends join, ch1, ch2, ch3, ch4, ch5, ch6, ch7, ch8 successively with IC 113,14,15,12,1,5,2,4 ends join, and ch9, ch10, ch6, ch12, ch13, ch19, ch15, ch16 also successively with IC 213,14,15,12,1,5,2,4 each the end join IC 1And IC 216 ends respectively connect+9V 8 ends, 7 terminations-9V, and 3 ends mutual 2 are connected to A after connecing 512 ends, IC 1And IC 26 be terminated at IC 410 ends, IC 16 ends and IC 29 ends, 8 ends join, be connected to chip IC again 314 ends, and IC 211 ends, 10 ends, 9 be terminated at IC 311,12,13 ends, IC 38 terminations-9V, 10 ends and 16 ends are parallel to+9V, 15 are terminated at IC 54 ends, IC 56 ends, 5 end parallel connections after again with capacitor C 6, resistance R 12Parallel connection is connected to-9V again, again with diode D 1Negative pole joins, D 1Positive pole and resistance R 37Be connected to IC after joining 611 ends, be connected in simultaneously IC again 39 ends.
3. electroencephalograph according to claim 1 is characterized in that: in main amplifier (3) circuit, and resistance R 14One termination reversed feedback amplifier A 514 ends, another termination 13 ends, resistance R 14An one end resistance R in parallel 13Back ground connection, A 512 termination IC of amplifier 13 ends, 14 be terminated at IC 85 ends; IC 84,5,6,10,11 terminations-9V, 4 termination amplifier A 610 ends, A 69 termination IC 415 ends, IC 89 terminating resistor R 18After connect-9V, connect simultaneously K switch again 1-2, be connected to+be connected to IC again behind the 9V 416 ends, simultaneously again through K switch 1-2Be connected to IC 410 ends, be parallel to resistance R 19After meet-9V IC again 91 end parallel resistance R 21, R 22Back ground connection, 2 ends again with resistance R 20, R 21Parallel connection, resistance R 20The other end is connected to operational amplifier A 68 ends, be parallel to operational amplifier A simultaneously 75 ends, A 76 termination IC 1014 ends, 16 ends and K switch 1-1Join, be parallel to resistance R with 11 ends again 13After meet-9V IC 1012 terminating resistor R 14An end be parallel to operational amplifier A again 83 ends, A 81 end and 2 ends join parallel resistance R simultaneously 26Be connected to photoelectricity again and isolate digital collection device (4).
4. electroencephalograph according to claim 1 is characterized in that: photoelectricity is isolated the photoisolator J of harvester (4) 2, its diode D 4Anodal connecting resistance R 28, resistance R 27With R 28Parallel connection is again with R 26Join resistance R 27Another termination+9V, audion BG 2Colelctor electrode and photoelectricity isolated tube J 3Transistor emitter join, and be parallel to operational amplifier A 92 ends, amplifier A 92 ends connect capacitor C again 7, 1 end also connects capacitor C 7Other end adjustable resistance R in parallel again 14, be connected to resistance R more jointly 29, resistance R 29And R 31Be connected in diode D 5Positive pole, audion BG 3Colelctor electrode again with resistance R 31Parallel connection is again with resistance R 32Be connected to+9V resistance R after the parallel connection 32The other end and rheostat W 2Join, be connected to resistance R again 23, again with resistance R 30With audion BG 2The emitter stage parallel connection after be connected to-9V A 93 ends also connect and become resistance along W 2, A 91 be terminated at A 1, 5 ends, 7 ends again negative feedback be connected to 6 ends, 7 ends meet IC simultaneously again 1113 ends, IC 1110 termination variable resistance W 2, 12 termination variable resistance W 4, together in parallel with 8 ends again, 1 end is+5V that 7 ends+15V, 11 ends are-12V that 19 and 20 ends join, and join with 16 ends again.
CN 95221127 1995-09-05 1995-09-05 Portable and digital electroencephalograph instrument Expired - Fee Related CN2229793Y (en)

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CN 95221127 CN2229793Y (en) 1995-09-05 1995-09-05 Portable and digital electroencephalograph instrument

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CN 95221127 CN2229793Y (en) 1995-09-05 1995-09-05 Portable and digital electroencephalograph instrument

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100348151C (en) * 2004-11-22 2007-11-14 中国科学院心理研究所 Electroencephalogram signal amplifier for portable event related brain potentiometer
CN103932702A (en) * 2014-04-24 2014-07-23 上海谱康电子科技有限公司 Electroencephalogram collecting and transmitting system and method
CN117481667A (en) * 2023-10-24 2024-02-02 沈阳工业大学 Electroencephalogram signal acquisition system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100348151C (en) * 2004-11-22 2007-11-14 中国科学院心理研究所 Electroencephalogram signal amplifier for portable event related brain potentiometer
CN103932702A (en) * 2014-04-24 2014-07-23 上海谱康电子科技有限公司 Electroencephalogram collecting and transmitting system and method
CN117481667A (en) * 2023-10-24 2024-02-02 沈阳工业大学 Electroencephalogram signal acquisition system

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