CN105212923A - A kind of Wearable brain electricity harvester - Google Patents

A kind of Wearable brain electricity harvester Download PDF

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Publication number
CN105212923A
CN105212923A CN201510563249.8A CN201510563249A CN105212923A CN 105212923 A CN105212923 A CN 105212923A CN 201510563249 A CN201510563249 A CN 201510563249A CN 105212923 A CN105212923 A CN 105212923A
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China
Prior art keywords
electrode
module
processing module
eeg
acquisition
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CN201510563249.8A
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Chinese (zh)
Inventor
孔凡德
张树威
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Beijing Jinlin Technology Co Ltd
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Beijing Jinlin Technology Co Ltd
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Priority to CN201510563249.8A priority Critical patent/CN105212923A/en
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Abstract

The invention discloses a kind of Wearable brain electricity harvester, it is made up of electrode for encephalograms, EEG Processing module, signal transmission module and power module; EEG Processing modular device is in the front end of annular body; Electrode for encephalograms is divided into acquisition electrode, active electrode and ground electrode, and acquisition electrode is multiple; Acquisition electrode, active electrode and ground electrode are arranged on the inner side of annular body; EEG Processing module comprises signal amplification module, Filtering Processing module and D/A switch module; Acquisition electrode, active electrode and ground electrode are all connected on the signal amplification module in EEG Processing module; Signal amplification module, Filtering Processing module, D/A switch sequence of modules are connected successively; D/A switch module is connected with Bluetooth communication modules, and Bluetooth communication modules is connected on data reception module.The present invention adopts three electrode design, solves the use problem to silver-silver chloride wet electrode in traditional brain wave acquisition device, can be different fields and provide data, thus expanded the use of brain power technology in each field greatly.

Description

A kind of Wearable brain electricity harvester
Technical field
The present invention relates to a kind of brain wave acquisition device, particularly relate to a kind of Wearable brain electricity harvester.
Background technology
In recent years, in Aeronautics and Astronautics field, brain wave acquisition technology serves good effect for the fatigue monitoring of aircrew.In addition, in archery field, muscle and strength the primary factor of non-winning, can ensure good to determine power and attention is the key of getting the upper hand of.In some countries in the U.S., Korea S and Europe, professional bow uses brain wave acquisition technology to train the concentration degree of brain, and this technology can help athlete to improve training achievement.In addition, brain wave acquisition technology has vast potential for future development in fields such as amusement, education, health.Therefore this technology becomes current study hotspot both domestic and external.
Brain wave acquisition is a kind of system can setting up information interaction between human brain and external equipment.The information that brain sends by it, controlled external equipment afterwards through a series of process.The eeg recording electrode adopted clinically is at present silver-silver chloride wet electrode, and the gel in this wet electrode has certain injury to skin, especially the crowd of allergic skin.For this reason, we have developed Wearable brain electricity harvester utilize dry electrode brain wave acquisition technology to carry out E.E.G collection.
Brain wave acquisition know-why:
Have the neuron counted in 10,000,000,000 in brain, brain neural signal is the bio signal be associated with brain, and each neuron can produce small electric field, and E.E.G is the set of many tiny signals.E.E.G describes from frequency domain aspect usually, and by the impact of outside stimulus and Inherent spirit state, frequency domain, the amplitude of variation of E.E.G are very large.Wherein Delta, Theta, Alpha, Beta and Gamma ripple is the title of different frequency E.E.G, which describes the state of many brains.Based on above-mentioned mechanism, dry electrode brain electric transducer is utilized to collect original EEG signals, by signal processing technology, signal is transformed into frequency domain from time domain, then Delta, Theta, Alpha, Beta and Gamma5 kind E.E.G is gone out according to frequency separation, so just can observe the distribution of frequency of brain wave, the mental status of these E.E.G discriminating test person can be utilized thus.
The shortcoming of prior art is:
(1), need in existing brain wave acquisition equipment to use silver-silver chloride wet electrode, this wet electrode uses very inconvenient, and gel has certain injury to skin, the especially crowd of allergic skin;
(2), existing wet electrode brain wave acquisition equipment use is complicated, and is subject to environmental constraints;
(3), the data of existing wet electrode brain wave acquisition are mainly medical services, and the data other industry of collection cannot use, thus limits the use of its brain power technology at other field, and usage range limits to.
Summary of the invention
In order to solve the weak point existing for above-mentioned technology, the invention provides a kind of Wearable brain electricity harvester.
In order to solve above technical problem, the technical solution used in the present invention is: a kind of Wearable brain electricity harvester, and it is made up of electrode for encephalograms, EEG Processing module, signal transmission module and power module; EEG Processing modular device is in the front end of annular body; Electrode for encephalograms is divided into acquisition electrode, active electrode and ground electrode, and acquisition electrode is multiple; Acquisition electrode, active electrode and ground electrode are arranged on the inner side of annular body;
EEG Processing module comprises signal amplification module, Filtering Processing module and D/A switch module; Acquisition electrode, active electrode and ground electrode are all connected on the signal amplification module in EEG Processing module; Signal amplification module, Filtering Processing module, D/A switch sequence of modules are connected successively; D/A switch module is connected with Bluetooth communication modules, and Bluetooth communication modules is connected on data reception module; Electrode screening is provided with between ground electrode and active electrode; Parts in EEG Processing device are all integrated on processor circuit board;
Electrode for encephalograms is attached to forehead position with acquired signal, EEG signals is passed to EEG Processing module, signal amplification module in EEG Processing module amplifies, then after Filtering Processing module, D/A switch module, is continued to send signal transmission module to by signal; Signal transmission module is responsible for the signal received from EEG Processing module to carry out data compression process, then by signal transmission module Bluetooth communication modules, sends EEG signals to data reception module, to carry out storing and subsequent treatment.
The upper left side of processor circuit board is disposed with 3.3V power supply, the first data-interface, the 3rd data-interface 8 and the first interface of the ground wire from left to right; The below of processor circuit board and 3.3V power supply corresponding section are provided with buzzer and drive audion.
Buzzer drives audion to be connected with the second interface of the ground wire, and the second ground wire connection jaws is connected with data buffer; Processor circuit board above second ground wire connection jaws is provided with antenna match inductance.
Antenna match inductance is connected with Bluetooth transmission antenna.The right-hand member of processor circuit board is provided with a pair R4-earth resistance, and R4-earth resistance is connected with BT battery; The side of annular body is provided with wears connecting interface.
The present invention has the following advantages:
(1), present invention employs dry type three electrode design, solve the use problem to silver-colored monochlor(in)ate silver wet electrode in traditional brain wave acquisition device.Can gather eeg data fast and effectively, and to skin fanout free region.
(2), the present invention only needs user to wear in forehead position, just conveniently can carry out the collecting work of eeg data.Amplifier module and bluetooth transmission are combined togather by Wearable brain electricity harvester, can reach better high anti-jamming capacity and low error rate and shorten the effects such as transmission time.
(3), numerous eeg datas can carry out gathering by the present invention, Filtering Processing, obtains Delta, Theta, Alpha, Beta and Gamma ripple, then these waveforms carried out point other record.Data can be provided by it to the requirement of data for different fields.Thus expanded the use of brain power technology in each field greatly.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 inner theory structure schematic diagram of the present invention.
Fig. 3 is the circuit diagram of signal transmission module of the present invention.
Fig. 4 is the circuit theory diagrams of power module of the present invention.
Fig. 5 is workflow diagram of the present invention.
In figure: 1, acquisition electrode; 2, EEG Processing device; 3, ground electrode; 4, electrode screening; 5, active electrode; 6,3.3V power supply; 7, the first data-interface; 8, the second data-interface; 9, the first interface of the ground wire; 10, buzzer drives audion; 11, data buffer; 12, eeg data interface; 13, the second interface of the ground wire; 14, power filter inductance; 15, resettable fuse; 16, R4-earth resistance; 17, BT-anode; 18, BT-Electrode Negative; 19, Bluetooth transmission antenna; 20, antenna match inductance; 21, connecting interface is worn.
Detailed description of the invention
As shown in Fig. 1 ~ Fig. 5, the present invention is made up of electrode for encephalograms, EEG Processing module (amplifier) 2, signal transmission module and power module; EEG Processing module 2 device is in the front end of annular body; Electrode for encephalograms is divided into acquisition electrode 1, active electrode 5 and ground electrode 3, and acquisition electrode 1 is multiple (being at least two); Acquisition electrode 1, active electrode 5 and ground electrode 3 are arranged on the inner side of annular body.Annular body is for being worn on head, and the side of annular body is provided with wears connecting interface 21.
EEG Processing module comprises signal amplification module, Filtering Processing module and D/A switch module; Acquisition electrode 1, active electrode 5 and ground electrode 3 are all connected on the signal amplification module in EEG Processing module; Signal amplification module, Filtering Processing module, D/A switch module, Bluetooth communication modules, data reception module order is connected successively.Electrode screening 4 is provided with between ground electrode 3 and active electrode 5.
Parts in EEG Processing device 2 are all integrated on processor circuit board, the upper left side of processor circuit board is disposed with 3.3V power supply 6, first data-interface 7, the 3rd data-interface 8 and the first interface of the ground wire 9 from left to right, the below of processor circuit board and 3.3V power supply 6 corresponding section are provided with buzzer and drive audion 10, buzzer drives audion 10 to be connected with the second interface of the ground wire 13, and the second ground wire connection jaws 13 is connected with data buffer.Processor circuit board above second ground wire connection jaws 13 is provided with antenna match inductance 20, and antenna match inductance 20 is connected with Bluetooth transmission antenna 19.The right-hand member of processor circuit board is provided with a pair R4-earth resistance 16, R4-earth resistance 16 and is connected with BT battery.
Workflow of the present invention is: electrode for encephalograms is attached to forehead position with acquired signal, EEG signals is passed to EEG Processing module, signal amplification module in EEG Processing module amplifies, again after Filtering Processing module, D/A switch module, signal is continued to send signal transmission module to; Signal transmission module is responsible for the signal received from EEG Processing module to carry out data compression process, then by signal transmission module Bluetooth communication modules, sends EEG signals to data reception module, to carry out storing and subsequent treatment; Power-supply system is responsible for the power supply of whole eeg collection system.The workflow diagram of eeg collection system as shown in Figure 5.
The specific works principle of each ingredient:
1, electrode for encephalograms:
Electrode for encephalograms is the interface that the present invention contacts with brain, and its function is perception brain electricity, and converts thereof into the signal of telecommunication being easy to measure and process, and for obtaining an electric potential signal, at least needs two acquisition electrodes 1.Potential difference between two acquisition electrodes is exactly brain electricity, i.e. EEG signals.This signal is when fine and close skull is delivered to skin of head surface, and through overdamping, signal is very faint.And the frequency of EEG signals is at below 100HZ, this frequency range is vulnerable to the impact of the public audio-frequency noise of 50HZ.In order to solve such problem, when hardware designs, present invention employs three electrode structure, when namely gathering EEG signals, using acquisition electrode 1, active electrode 5 and ground electrode 3 simultaneously.Such internal circuit of the present invention measures the voltage between active electrode and ground electrode, and the voltage of two acquisition electrodes, then two values are subtracted each other, obtain active electrode and voltage between gathering, electrostatic charge that user assembles and the interference from public affairs (50HZ) frequently can be got rid of with it.
2, EEG Processing module (amplifier):
The brain wave frequency that electrode for encephalograms collects is lower and very faint, in order to carry out various process to brain electricity, brain electricity must be amplified to required intensity.Carry out signals collecting because electrode for encephalograms needs to be placed on forehead portion, therefore require that EEG Processing module has following characteristics: less size (being convenient to wear), lower supply voltage (being convenient to power), lower power consumption (being convenient to work long hours).According to the feature of brain electricity, require that EEG Processing module also needs to have the characteristics such as high input impedance, high cmrr, low noise, the form at present mainly through multistage amplification realizes.Because the amplification of preamplifier usually can not be too high, so only rely on enlarge leadingly, the amplitude of brain electricity is still inadequate, also needs the rear class processing and amplifying of brain electricity being carried out to adjustable gain.In addition, in eeg signal acquisition process, there is the interference of some noise signals, as: human body myoelectricity, contact noise, environment noise and baseline drift etc.Usual at the corresponding wave filter of the middle increase of multistage amplifier at present, to complete the function reducing noise jamming.The last task of EEG Processing module section carries out mould/number (A/D) conversion, so that the Signal transmissions in later stage and eeg data analysis to EEG signals.
3, signal transmission module:
The function of Signal transmissions part is the data reception module EEG signals of signal transmission module process being sent to rear end.Traditional brain wave acquisition technology adopts USB to communicate with backend computer or other brain electric treatment equipment, but this mode easily makes the application of brain electricity be subject to the restriction in environment and place.Wearable brain electricity harvester adopts present most popular Bluetooth technology to carry out data communication.Can reach the requirement of long-time application and portability like this, and Bluetooth communication modules has the advantages that micropower is launched and volume is little.
Amplifier module and bluetooth transmission are combined togather by the present invention, can reach better high anti-jamming capacity and low error rate and shorten the effects such as transmission time.
4, power module:
Power module is used for for the invention provides power supply, and in order to gather EEG signals for a long time, Wearable brain electricity harvester have employed lithium battery and powers.The feature of lithium battery be capacity high, to have extended cycle life and without memory, compare the electric power system that dc-battery is applicable to this high precision instrument of brain wave acquisition device more.
Above-mentioned embodiment is not limitation of the present invention; the present invention is also not limited in above-mentioned citing; the change that those skilled in the art make within the scope of technical scheme of the present invention, remodeling, interpolation or replacement, also all belong to protection scope of the present invention.

Claims (5)

1. a Wearable brain electricity harvester, is characterized in that: it is made up of electrode for encephalograms, EEG Processing module 2, signal transmission module and power module; Described EEG Processing module (2) device is in the front end of annular body; Electrode for encephalograms is divided into acquisition electrode (1), active electrode (5) and ground electrode (3), and acquisition electrode (1) is for multiple; Acquisition electrode (1), active electrode (5) and ground electrode (3) are arranged on the inner side of annular body;
Described EEG Processing module comprises signal amplification module, Filtering Processing module and D/A switch module; Acquisition electrode (1), active electrode (5) and ground electrode (3) are all connected on the signal amplification module in EEG Processing module; Described signal amplification module, Filtering Processing module, D/A switch sequence of modules are connected successively; Described D/A switch module is connected with Bluetooth communication modules, and Bluetooth communication modules is connected on data reception module; Electrode screening (4) is provided with between described ground electrode (3) and active electrode (5); Parts in described EEG Processing device (2) are all integrated on processor circuit board;
Described electrode for encephalograms is attached to forehead position with acquired signal, EEG signals is passed to EEG Processing module, signal amplification module in EEG Processing module amplifies, then after Filtering Processing module, D/A switch module, is continued to send signal transmission module to by signal; Signal transmission module is responsible for the signal received from EEG Processing module to carry out data compression process, then by signal transmission module Bluetooth communication modules, sends EEG signals to data reception module, to carry out storing and subsequent treatment.
2. Wearable brain electricity harvester according to claim 1, is characterized in that: the upper left side of described processor circuit board is disposed with 3.3V power supply (6), the first data-interface (7), the 3rd data-interface (8) and the first interface of the ground wire (9) from left to right; The below of described processor circuit board and 3.3V power supply (6) corresponding section are provided with buzzer and drive audion (10).
3. Wearable brain electricity harvester according to claim 1, it is characterized in that: described buzzer drives audion (10) to be connected with the second interface of the ground wire (13), and the second ground wire connection jaws (13) is connected with data buffer; The processor circuit board of described second ground wire connection jaws (13) top is provided with antenna match inductance (20).
4. Wearable brain electricity harvester according to claim 3, is characterized in that: described antenna match inductance (20) is connected with Bluetooth transmission antenna (19).
5. Wearable brain electricity harvester according to claim 1, is characterized in that: the right-hand member of described processor circuit board is provided with a pair R4-earth resistance (16), and R4-earth resistance (16) is connected with BT battery; The side of described annular body is provided with wears connecting interface (21).
CN201510563249.8A 2015-09-08 2015-09-08 A kind of Wearable brain electricity harvester Pending CN105212923A (en)

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Cited By (11)

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CN106725464A (en) * 2017-01-05 2017-05-31 中国科学院电子学研究所 Detect the dry electrode system of EEG signals
CN107029384A (en) * 2017-05-08 2017-08-11 江苏理工学院 A kind of safe auxiliary equipment of treadmill
CN107080536A (en) * 2017-05-25 2017-08-22 江苏师范大学 A kind of portable wireless multichannel brain electric signal acquiring system
CN107669266A (en) * 2017-10-12 2018-02-09 公安部南昌警犬基地 A kind of animal brain electricity analytical system
CN107890349A (en) * 2017-12-14 2018-04-10 上海惠诚科教器械股份有限公司 It is a kind of that training system is concentrated the mind on breathing based on brain wave Real-time Feedback
CN108543217A (en) * 2018-03-16 2018-09-18 广东工业大学 A kind of apparatus for curing insomnia and Insomnia therapy method
CN108784690A (en) * 2018-06-19 2018-11-13 苏州修普诺斯医疗器械有限公司 Mobile EEG signals Transmission system and method for transmitting signals
CN109602398A (en) * 2019-01-28 2019-04-12 深兰科技(上海)有限公司 A kind of physical signs monitoring device
WO2019178946A1 (en) * 2018-03-21 2019-09-26 深圳创达云睿智能科技有限公司 Electrode patch
CN111110229A (en) * 2019-12-25 2020-05-08 上海理工大学 Portable wireless electroencephalogram detection cap
CN112754482A (en) * 2021-02-10 2021-05-07 上海念通智能科技有限公司 Wearable device for detecting attention of autism children based on electroencephalogram

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106725464A (en) * 2017-01-05 2017-05-31 中国科学院电子学研究所 Detect the dry electrode system of EEG signals
CN107029384A (en) * 2017-05-08 2017-08-11 江苏理工学院 A kind of safe auxiliary equipment of treadmill
CN107080536A (en) * 2017-05-25 2017-08-22 江苏师范大学 A kind of portable wireless multichannel brain electric signal acquiring system
CN107669266A (en) * 2017-10-12 2018-02-09 公安部南昌警犬基地 A kind of animal brain electricity analytical system
CN107890349A (en) * 2017-12-14 2018-04-10 上海惠诚科教器械股份有限公司 It is a kind of that training system is concentrated the mind on breathing based on brain wave Real-time Feedback
CN108543217A (en) * 2018-03-16 2018-09-18 广东工业大学 A kind of apparatus for curing insomnia and Insomnia therapy method
WO2019178946A1 (en) * 2018-03-21 2019-09-26 深圳创达云睿智能科技有限公司 Electrode patch
CN108784690A (en) * 2018-06-19 2018-11-13 苏州修普诺斯医疗器械有限公司 Mobile EEG signals Transmission system and method for transmitting signals
CN109602398A (en) * 2019-01-28 2019-04-12 深兰科技(上海)有限公司 A kind of physical signs monitoring device
CN111110229A (en) * 2019-12-25 2020-05-08 上海理工大学 Portable wireless electroencephalogram detection cap
CN112754482A (en) * 2021-02-10 2021-05-07 上海念通智能科技有限公司 Wearable device for detecting attention of autism children based on electroencephalogram

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Application publication date: 20160106