CN103142224B - Electroencephalogramsignal signal detector and the method for detecting EEG signals - Google Patents
Electroencephalogramsignal signal detector and the method for detecting EEG signals Download PDFInfo
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- CN103142224B CN103142224B CN201310033923.2A CN201310033923A CN103142224B CN 103142224 B CN103142224 B CN 103142224B CN 201310033923 A CN201310033923 A CN 201310033923A CN 103142224 B CN103142224 B CN 103142224B
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Abstract
Embodiments of the invention disclose a kind of electroencephalogramsignal signal detector and the method for detecting EEG signals, and this electroencephalogramsignal signal detector comprises the first EEG signals checkout gear, for detecting the EEG signals of the EEG signals path of the first quantity; And EEG signals gathering-device, for collecting the EEG signals of the EEG signals path of this first quantity to obtain EEG signals testing result.If this electroencephalogramsignal signal detector also comprises the second EEG signals checkout gear of the EEG signals of the EEG signals path for detecting the second quantity, then this EEG signals gathering-device is also for collecting the EEG signals of the EEG signals path of this first quantity and this second quantity to obtain above-mentioned EEG signals testing result.Embodiments of the invention can realize carrying out Modularly according to different purposes to the EEG signals path that electroencephalogramsignal signal detector has and freely increase and decrease.
Description
Technical field
Embodiments of the invention relate to brain electro-technical field, are specifically related to a kind of electroencephalogramsignal signal detector and the method for detecting EEG signals.
Background technology
Human tissue cell always constantly produces very faint bioelectric spontaneous.EEG signals is the population effect of the electrical activity of a large amount of cranial nerve cell under height coherency states on cerebral cortex.If utilize the electrode laid on scalp to gather EEG signals, amplify through brain electro-detection equipment and be recorded on dedicated paper, then can obtain figure, the curve with certain waveform, wave amplitude, frequency and phase place, i.e. electroencephalogram.When cerebral tissue generation pathology or changing function, also there is corresponding change in EEG signals, thus provide foundation for brain research, the research of physiology nerve, clinical diagnosis and rehabilitation.
For the different purposes such as the research of above-mentioned brain, the research of physiology nerve, clinical diagnosis and rehabilitation, required accuracy of detection is different often.Such as, for brain research needs 64 tunnel EEG signals to realize high measurement accuracy, and only need 16 tunnel EEG signals with the accuracy of detection of satisfied necessity for rehabilitation.
But the quantity of the EEG signals path that the electroencephalogramsignal signal detector in correlation technique has is all fixing, the quantity of corresponding EEG signals path namely cannot be selected according to above-mentioned different purposes.
Summary of the invention
One object of the present invention is to provide a kind of electroencephalogramsignal signal detector and the method for detecting EEG signals, cannot select the problem of the quantity of corresponding EEG signals path with the electroencephalogramsignal signal detector solved in correlation technique according to different purposes.
According to an aspect of the present invention, provide a kind of electroencephalogramsignal signal detector, comprise: the first EEG signals checkout gear, for detecting EEG signals and the second EEG signals checkout gear of the EEG signals path of the first quantity, for detecting the EEG signals of the EEG signals path of the second quantity.Described electroencephalogramsignal signal detector also comprises EEG signals gathering-device, for the EEG signals of the EEG signals path of the EEG signals and described second quantity of collecting the EEG signals path of described first quantity, to obtain EEG signals testing result.
According to one embodiment of present invention, described first quantity equals described second quantity.
According to still another embodiment of the invention, described first quantity and described second quantity equal 16.
According to still a further embodiment, described first EEG signals checkout gear is all connected with described EEG signals gathering-device by serial fiber optic data communication interface with described second EEG signals checkout gear.
According to still a further embodiment, described first EEG signals checkout gear and described second EEG signals checkout gear include: brain electrode, contacts with scalp, for gathering the signal of telecommunication of brain; Filter unit, for filtering the interfering signal in the described signal of telecommunication, to obtain EEG signals; Amplifying unit, for amplifying described EEG signals; Detecting unit, for detecting the EEG signals after amplifying unit amplification.
According to still a further embodiment, described first EEG signals checkout gear and described second EEG signals checkout gear all also comprise: controller, for controlling the time constant filter of described filter unit.
According to still a further embodiment, described controller is also for controlling the amplification of described amplifying unit.
According to still a further embodiment, described first EEG signals checkout gear and described second EEG signals checkout gear all also comprise: brain electrical contact impedance detection unit, for detecting the brain electrical contact impedance between described brain electrode and described scalp; Described controller is also for controlling described brain electrical contact impedance detector.
According to still a further embodiment, described brain electrical contact impedance detection unit comprises: lead selector, for selecting described brain electrode in multiple brain electrode; Described controller is also for controlling the selection operation of described lead selector.
According to another aspect of the present invention, providing a kind of method for detecting EEG signals, comprising: the EEG signals of the EEG signals detecting the EEG signals path of the first quantity and the EEG signals path detecting the second quantity.The method also comprises the EEG signals of the EEG signals of the EEG signals path collecting described first quantity and the EEG signals path of described second quantity, to obtain described EEG signals testing result.
According to one embodiment of present invention, wherein said first quantity equals described second quantity.
According to still another embodiment of the invention, wherein said first quantity and described second quantity equal 16.
According to still a further embodiment, the EEG signals wherein detecting the EEG signals path of the first and second quantity includes: the signal of telecommunication gathering brain; Filter the interfering signal in the described signal of telecommunication, to obtain EEG signals; Amplify described EEG signals; Detect the EEG signals after amplifying.
According to still a further embodiment, the EEG signals wherein detecting the EEG signals path of the first and second quantity also comprises: the time constant filter controlling the filter unit for filtering the interfering signal in the described signal of telecommunication.
According to still a further embodiment, said method also comprises: the amplification controlling the amplifying unit for amplifying described EEG signals.
According to still a further embodiment, said method also comprises: control the brain electrode of ac current signal by the signal of telecommunication for gathering brain; And the brain electrical contact impedance detected between described brain electrode and scalp.
According to still a further embodiment, the brain electrical contact impedance wherein detected between described brain electrode and scalp comprises: in multiple brain electrode, select one of them brain electrode by lead selector; And the selection operation of described lead selector is controlled by controller.
The EEG signals that embodiments of the invention detect by collecting the first EEG signals checkout gear when electroencephalogramsignal signal detector only comprises the first EEG signals checkout gear, collect the EEG signals that the first EEG signals checkout gear and the second EEG signals checkout gear detect when electroencephalogramsignal signal detector also comprises the second EEG signals checkout gear, thus realize electroencephalogramsignal signal detector and can carry out Modularly according to different purposes to the EEG signals path that it has and freely increase and decrease.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structured flowchart of the electroencephalogramsignal signal detector according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the electroencephalogramsignal signal detector according to the embodiment of the present invention;
Fig. 3 is the schematic diagram of the EEG signals Simulation scale-up device according to the embodiment of the present invention;
Fig. 4 is the schematic diagram of the brain electrical contact impedance detection according to the embodiment of the present invention;
Fig. 5 is the schematic diagram of the EEG signals data acquisition processing device according to the embodiment of the present invention;
Fig. 6 is the schematic diagram of the multichannel easily extensible transacter according to the embodiment of the present invention; And
Fig. 7 is the flow chart of the method for detecting EEG signals according to the embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Fig. 1 is the structured flowchart of the electroencephalogramsignal signal detector according to the embodiment of the present invention, as shown in Figure 1, comprises the first EEG signals checkout gear 11, second EEG signals checkout gear 13 and EEG signals gathering-device 15.Wherein, the first EEG signals checkout gear 11 is for detecting the EEG signals of the EEG signals path of the first quantity; Second EEG signals checkout gear 13 is for detecting the EEG signals of the EEG signals path of the second quantity; EEG signals gathering-device 15, be connected to the first EEG signals checkout gear 11 and the second EEG signals checkout gear 13, the EEG signals of the EEG signals path of the second quantity detected for the EEG signals of EEG signals path and this second EEG signals checkout gear of collecting the first quantity that this first EEG signals checkout gear detects, to obtain above-mentioned EEG signals testing result.
In correlation technique, the quantity of the EEG signals path that electroencephalogramsignal signal detector has is all fixing, cannot select the quantity of corresponding EEG signals path according to different purposes.In the embodiment of the present invention, the EEG signals that the first EEG signals checkout gear detects is collected when electroencephalogramsignal signal detector only comprises the first EEG signals checkout gear, when electroencephalogramsignal signal detector also comprises the second EEG signals checkout gear, collect the EEG signals that the first EEG signals checkout gear and the second EEG signals checkout gear detect, thus realize electroencephalogramsignal signal detector and can carry out Modularly according to different purposes to the EEG signals path that it has and freely increase and decrease.
According to one embodiment of present invention, in order to realize the first EEG signals checkout gear and the second EEG signals checkout gear can be replaced arbitrarily according to different purposes and/or expand, the first quantity of the embodiment of the present invention can equal the second quantity.And then it all can equal 16, thus realize electroencephalogramsignal signal detector and in units of 16 EEG signals paths, carry out Modularly according to different purposes and freely increase and decrease, thus fully meet the needs of electroencephalogramsignal signal detector for different purposes.It should be noted that; this 16 EEG signals path is only a kind of citing, and in practical application, the first quantity also may equal 32,64,128,256 or 512 according to different purposes; even may equal 100,300, it all should include the protection domain of the embodiment of the present invention in.
In addition, this first EEG signals checkout gear all can be connected with this EEG signals gathering-device, so that EEG signals sends quickly and accurately by serial fiber optic data communication interface with this second EEG signals checkout gear.
The electroencephalogramsignal signal detector according to the embodiment of the present invention is further illustrated below in conjunction with Fig. 1.
Fig. 2 is the schematic diagram of the electroencephalogramsignal signal detector according to the embodiment of the present invention, as shown in Figure 2, EEG signals Simulation scale-up device 21 and EEG signals data acquisition processing device 23 link together and form the eeg signal acquisition system (corresponding to above-mentioned first EEG signals checkout gear 11 or the second EEG signals checkout gear 13) of 16 independent passages, connect in a modular manner be connected day with multichannel easily extensible transacter 25 (corresponding to above-mentioned EEG signals gathering-device 15) by serial optical fiber communication.Like this, required acquisition channel can be expanded as required in units of 16 passages.
Hereafter also be described in detail for the concrete structure of EEG signals Simulation scale-up device 21, EEG signals data acquisition processing device 23 and multichannel easily extensible transacter 25.
One, EEG signals Simulation scale-up device 21
Fig. 3 is the schematic diagram of the EEG signals Simulation scale-up device according to the embodiment of the present invention.EEG signals Simulation scale-up device 21 carries out pretreatment for the small-signal exported brain electrode.
As shown in Figure 3, EEG signals Simulation scale-up device 21 mainly comprises the unit such as combination Conduction choice 211, brain electrode input impedance matching 212, common mode shield guard 213, common mode driving 214, the constant amplification of two-stage 215, program control high-pass filtering 216,50Hz power frequency notch 217, low-pass filtering 218, programming amplifying 219 and brain electrical contact impedance detection 220.Be described in detail respectively below.
(1) Conduction choice 211 is made up of the program control analog switch array of two 16*8.
(2) brain electrode input impedance matching 212 is made up of emitter follower.
(3) common mode shield guard 213 is connected with its screen layer by emitter follower by the common mode input signal of all electrode lead wires.
(4) common mode drives 214 to be connected with human body brain with current-limiting resistance by emitter follower successively by negative feedback by the common mode input signal of all conducting wires.
(5) the constant amplification of two-stage 215 successively by the preposition instrument of high output impedance, low noise amplify 251 and the in-phase proportion amplification 252 that be made up of the operational amplifier of high input impedance, low noise form.In amplification design process, the amplification of preposition instrument should be improved as far as possible.
(6) program control high-pass filtering 216 selects an analog switch to connect different resistance selections four kinds of differences by frequency by control four.
(7) 50Hz power frequency notch 217 is double-T shaped frequency notches.
(8) low-pass filtering 218 is quadravalence Butterworth filters.
(9) programmable amplifier 219 is made up of the special programming amplifying chip by controlling amplification.
(10) brain electrical contact impedance detection 220, for monitoring the size of each electrode and scalp contact impedance.
Fig. 4 is the schematic diagram of the brain electrical contact impedance detection according to the embodiment of the present invention, as shown in Figure 4, its working method is, signal source 2201 produces the sine wave of 50Hz, by resistance R1 current limliting dividing potential drop, through Conduction choice 2202 by electrode stream to be measured to reference electrode, reference electrode ground connection by the differential voltage sent out device 2203 large and detect between this two electrode, then DC voltage is changed into by low pass filter 2204, compare with canonical reference voltage Vref finally by comparator 2205, the low and high level that comparator 2205 exports controls the light on and off of display unit 2206.Wherein, signal source 2201 is made up of programmable signal generator; Conduction choice 2202 selects an analog switch to control by 16, detects the contact resistance of each electrode for gating one by one; Differential amplifier 2203 is made up of the instrument amplifier of high input impedance; Low pass filter 2204 is RC wave filter; Comparator 2205 is made up of dedicated comparator integrated chip.
Two, EEG signals data acquisition processing device 23
Fig. 5 is the schematic diagram of the EEG signals data acquisition processing device according to the embodiment of the present invention, as shown in Figure 5, mainly comprise multichannel A/D synchronous converter 231, CPLD controller 232, data storage 233, DSP data processor 234, serial fiber optic data communication interface 235 form.The A/D synchronous acquisition channel number of each independent EEG signals data acquisition processing device 23 is 16.Be described in detail respectively below.
(1) multichannel A/D synchronous converter 231 is made up of two eight passage A/D synchronous converters.
(2) CPLD controller 232 is mainly used in controlling programmable amplifier 219 in EEG signals Simulation scale-up device, program control high-pass filtering 216 and brain electrical contact impedance detection 220, and for controlling multichannel A/D synchronous converter 231, data storage 233 and the serial fiber optic data communication interface 235 in EEG signals data acquisition processing device 23.Its working method is, CPLD controller 232 obtains data from multichannel A/D synchronous converter 231 and exists data storage 233, following DSP data processor 234 processes collecting data, then the data processed is transferred out by serial fiber optic data communication interface by CPLD controller 232.
(3) DSP data processor 234 mainly completes the pretreatment such as digital filtering, classification, ERP detection of EEG signals in real time.
Three, multichannel easily extensible transacter 25
Fig. 6 is the schematic diagram of the multichannel easily extensible transacter according to the embodiment of the present invention, as shown in Figure 6, mainly comprises multiple serial fiber optic data communication interface 251, FPGA controller 252 and kilomega network interface 253.Its working method is, is controlled the eeg data of all EEG signals data acquisition processing device 23 output of multiple serial optical fiber communication synchronous collection, and export to host computer by kilomega network interface 253 by FPGA controller 252.
Fig. 7 is the flow chart of the method for detecting EEG signals according to the embodiment of the present invention, as shown in Figure 7, comprises following step S702 to step S706.
Step S702, detects the EEG signals of the EEG signals path of the first quantity.
Step S704, detects the EEG signals of the EEG signals path of the second quantity.
Step S706, collects the EEG signals of the EEG signals of the EEG signals path of described first quantity and the EEG signals path of described second quantity, to obtain described EEG signals testing result.
In correlation technique, the quantity of the EEG signals path that electroencephalogramsignal signal detector has is all fixing, cannot select the quantity of corresponding EEG signals path according to different purposes.In the embodiment of the present invention, the EEG signals of the EEG signals path of described first quantity is collected when only detecting the EEG signals of EEG signals path of the first quantity, when also detecting the EEG signals of EEG signals path of the second quantity, collect the EEG signals of the EEG signals of the EEG signals path of described first quantity and the EEG signals path of described second quantity, thus realize electroencephalogramsignal signal detector and can carry out Modularly according to different purposes to the EEG signals path that it has and freely increase and decrease.
In sum, according to the abovementioned embodiments of the present invention, a kind of electroencephalogramsignal signal detector and the method for detecting EEG signals is provided.The embodiment of the present invention can realize carrying out Modularly according to different purposes to the EEG signals path that electroencephalogramsignal signal detector has and freely increase and decrease.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each device or each step can realize with general accountant, they can concentrate on single accountant, or be distributed on network that multiple accountant forms, alternatively, they can realize with the executable program code of accountant, thus they storages can be performed by accountant in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. an electroencephalogramsignal signal detector, comprising:
First EEG signals checkout gear, for detecting the EEG signals of the EEG signals path of the first quantity;
Second EEG signals checkout gear, for detecting the EEG signals of the EEG signals path of the second quantity; And
EEG signals gathering-device, for when the EEG signals of described first quantity only being detected, collect the EEG signals of the EEG signals path of described first quantity, to obtain EEG signals testing result, when the EEG signals of EEG signals path of described second quantity also being detected, collect the EEG signals of the EEG signals of the EEG signals path of described first quantity and the EEG signals path of described second quantity, to obtain EEG signals testing result.
2. electroencephalogramsignal signal detector according to claim 1, wherein said first quantity equals described second quantity.
3. electroencephalogramsignal signal detector according to claim 2, wherein said first quantity and described second quantity equal 16.
4. electroencephalogramsignal signal detector according to any one of claim 1 to 3, wherein said first EEG signals checkout gear is all connected with described EEG signals gathering-device by serial fiber optic data communication interface with described second EEG signals checkout gear.
5. electroencephalogramsignal signal detector according to any one of claim 1 to 3, wherein said first EEG signals checkout gear and described second EEG signals checkout gear include:
Brain electrode, for gathering the signal of telecommunication of brain;
Filter unit, for filtering the interfering signal in the described signal of telecommunication, to obtain EEG signals;
Amplifying unit, for amplifying described EEG signals;
Detecting unit, for detecting the EEG signals after amplifying unit amplification.
6. electroencephalogramsignal signal detector according to claim 5, wherein said first EEG signals checkout gear and described second EEG signals checkout gear all also comprise:
Controller, for controlling the time constant filter of described filter unit.
7. electroencephalogramsignal signal detector according to claim 6, wherein said controller is also for controlling the amplification of described amplifying unit.
8. electroencephalogramsignal signal detector according to claim 6, wherein said first EEG signals checkout gear and described second EEG signals checkout gear all also comprise:
Brain electrical contact impedance detection unit, for detecting the brain electrical contact impedance between described brain electrode and scalp;
Described controller is also for controlling ac current signal by described brain electrode.
9. electroencephalogramsignal signal detector according to claim 8, wherein said brain electrical contact impedance detection unit comprises:
Lead selector, for selecting one of them brain electrode in multiple brain electrode;
Described controller is also for controlling the selection operation of described lead selector.
10., for detecting a method for EEG signals, comprising:
The first EEG signals checkout gear in electroencephalogramsignal signal detector detects the EEG signals of the EEG signals path of the first quantity;
The second EEG signals checkout gear in described electroencephalogramsignal signal detector detects the EEG signals of the EEG signals path of the second quantity; And
When the EEG signals of described first quantity only being detected, the EEG signals of the EEG signals path of described first quantity collected by EEG signals gathering-device in described electroencephalogramsignal signal detector, to obtain EEG signals testing result, when the EEG signals of EEG signals path of described second quantity also being detected, described EEG signals gathering-device in described electroencephalogramsignal signal detector collects the EEG signals of EEG signals path of described first quantity and the EEG signals of the EEG signals path of described second quantity, to obtain EEG signals testing result.
11. methods according to claim 10, wherein said first quantity equals described second quantity.
12. methods according to claim 11, wherein said first quantity and described second quantity equal 16.
13. according to claim 10 to the method according to any one of 12, and the EEG signals wherein detecting the EEG signals path of the first and second quantity includes:
Gather the signal of telecommunication of brain;
Filter the interfering signal in the described signal of telecommunication, to obtain EEG signals;
Amplify described EEG signals;
Detect the EEG signals after amplifying.
14. methods according to claim 13, the EEG signals wherein detecting the EEG signals path of the first and second quantity all also comprises:
Control the time constant filter of the filter unit for filtering the interfering signal in the described signal of telecommunication.
15. methods according to claim 14, also comprise:
Control the amplification of the amplifying unit for amplifying described EEG signals.
16. methods according to claim 14, also comprise:
Control the brain electrode of ac current signal by the signal of telecommunication for gathering brain; And
Detect the brain electrical contact impedance between described brain electrode and scalp.
17. methods according to claim 16, the brain electrical contact impedance wherein detected between described brain electrode and scalp comprises:
In multiple brain electrode, one of them brain electrode is selected by lead selector; And
The selection operation of described lead selector is controlled by controller.
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| 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 |
| CN104068851B (en) * | 2014-06-13 | 2016-08-24 | 广州中国科学院先进技术研究所 | Eeg signal acquisition system and method based on FPGA |
| CN112401898B (en) * | 2020-11-11 | 2024-03-12 | 西安臻泰智能科技有限公司 | High-precision electroencephalogram signal acquisition method and device |
| CN113057655A (en) * | 2020-12-29 | 2021-07-02 | 深圳迈瑞生物医疗电子股份有限公司 | Recognition method, recognition system and detection system for electroencephalogram signal interference |
| CN114403900B (en) * | 2022-02-08 | 2024-04-05 | 周口市中心医院 | Electroencephalogram data automatic recording and analyzing system and method in electroencephalogram machine |
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