CN101766485B - Wireless mobile real-time acquisition device for electroencephalograph of small animals - Google Patents

Wireless mobile real-time acquisition device for electroencephalograph of small animals Download PDF

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CN101766485B
CN101766485B CN201010124352XA CN201010124352A CN101766485B CN 101766485 B CN101766485 B CN 101766485B CN 201010124352X A CN201010124352X A CN 201010124352XA CN 201010124352 A CN201010124352 A CN 201010124352A CN 101766485 B CN101766485 B CN 101766485B
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CN101766485A (en
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牛金海
崔萌
邢江娃
童善保
聂冬
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SJTU ZHONGYUAN RESEARCH INSTITUTE
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Shanghai Jiaotong University
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract

The invention relates to a wireless mobile real-time acquisition device for electroencephalograph of small animals, and belongs to the technical field of wireless transmission. The device comprises an electrode, an electroencephalograph acquisition module, an RF wireless transmission module, a power supply module and a PC receiving module, wherein the electrode comprises two dual-lead channels and a reference electrode; and the RF wireless transmission module comprises a second synchronous serial interface and a wireless radio frequency transmitter. The wireless mobile real-time acquisition device has the advantages of small volume, light weight, low power consumption, convenient and accurate actual acquisition of electroencephalograph signals of the small animals, capability of performing real-time electroencephalograph acquisition on the small animals in the active state, suitability for long-term and uninterrupted electroencephalograph monitoring, low cost and high applicability.

Description

Wireless mobile real-time acquisition device for electroencephalograpof of small animals
Technical field
What the present invention relates to is a kind of device of radio transmission technical field, specifically is a kind of wireless mobile real-time acquisition device for electroencephalograpof of small animals.
Background technology
In the toy experimentation of life science, the collection of electroencephalograpof of small animals signal and monitoring are crucial technology as the element of toy neuroelectricity physiological Study always.Present electroencephalograpof of small animals signals collecting, because the restriction of equipment and technology itself, the experimenter often can only collect more stable eeg data under the toy narcotism.But anesthesia itself suppresses the cerebral cortex function simultaneously owing to blocked toy peripheral nervous conduction function, makes cranial nerve cell be subjected to the degree of depth and suppresses, and will inevitably impact experimental result even experiment itself.Be known that at present that under narcotism the specific function of nervous system of some of toy can't study, and the electroencephalograpof of small animals under the narcotism and the brain electricity under the active situation have than big-difference also.For example for some specific outside stimuluss, the neuroscientist is difficult in the situation of change of directly also observing electroencephalograpof of small animals under the anesthesia situation exactly.
Through existing literature search is found, (the Triangle Biosystems of TBSI company of the U.S., Inc) Kai Fa a two-channel wireless brain wave acquisition device at toy, its system architecture and traditional brain wave acquisition framework are similar, only are reduced to a bandpass filtering modules block on filter circuit.This system meets the requirements on function substantially, and portability is also very high, but power consumption is very big, only can use continuously 6 hours under the situation of using internal electric source, remains not enough for the long-time monitoring that some zooperies require; And the receiving system of this system is more complicated also.
Find by retrieval that again (Cleveland Medical Devices Inc.) also has a product RatPaak in U.S. Clevemed company, this product is the multiple physiological signal acquisition system of a dual pathways at toy, can gather EEG, ECG, EMG, multiple physiological signal such as EOG.The receiving terminal of this system is also complicated, and its volume, weight, power consumption are all very big, are inconvenient to test use.
In addition, some external team have also proposed the special IC (ASIC at mobile eeg collection system application, Application Specific Integrated Circuit) chip design scheme, these designs have good performance on portable and power consumption, (wherein reason is that it has a lot of non-repeatability engineering costs greatly but the cost of manufacture of ASIC is high, wherein again with the mask blank cost for the highest), also be not suitable for being applied to laboratory and use.
Summary of the invention
The present invention is exactly at the prior art above shortcomings, a kind of wireless mobile real-time acquisition device for electroencephalograpof of small animals that provides, can under the toy active state, gather brain, and be wirelessly transmitted to and further analyze on the PC and handle, this device is by two two passages input EEG signals of leading, through amplifying, filtering and A/D conversion back output, and be provided with wave point, and utilize the Zigbee agreement that EEG signals is wirelessly transmitted to PC, EEG signals is analyzed and handled.
The present invention is achieved by the following technical solutions, the present invention includes: electrode, brain wave acquisition module, RF wireless transport module, power module and PC receiver module, wherein: electrode is arranged on the head of tested toy, electrode links to each other with the brain wave acquisition module and transmits original EEG signals, the brain wave acquisition module digital brain electrical signal after the transmission modulation that links to each other with the RF wireless transport module, the RF wireless transport module transmission of digital EEG signals that links to each other with the PC receiver module, power module respectively with the brain wave acquisition module transmission power information that links to each other with the RF wireless transport module.
Described electrode comprises: two two lead passage and reference electrodes, wherein: two two passages that lead are separately positioned on the head of tested toy and the original EEG signals of transmission that links to each other with the brain wave acquisition module respectively, and reference electrode is arranged on the tested toy and links to each other with the brain wave acquisition module and transmits reference electrode information.
Described power module is some button cells.
Described brain wave acquisition module comprises: two preposition differential amplification submodules, two main amplification filtering submodules, level is adjusted submodule, the analog digital conversion submodule, the central processing unit and first synchronous serial interface, wherein: the input of two preposition differential amplification submodules all links to each other with electrode and transmits original EEG signals, the outfan of the first preposition differential amplification submodule EEG signals of transmission after amplifying that link to each other with the input of the first main amplification filtering submodule, the outfan of the second preposition differential amplification submodule EEG signals of transmission after amplifying that link to each other with the input of the second main amplification filtering submodule, the outfan of two main amplification filtering submodules all links to each other with the analog digital conversion submodule and transmits filtered EEG signals, level adjustment submodule links to each other with main amplification filtering submodule with preposition differential amplification submodule respectively and transmits bias voltage, the analog digital conversion submodule digital brain electrical signal that links to each other with central processing unit, the central processing unit transmission of digital EEG signals that links to each other with first synchronous serial interface, first synchronous serial interface digital brain electrical signal after the transmission modulation that links to each other with the RF wireless transport module.
Described RF wireless transport module comprises: second synchronous serial interface and less radio-frequency transmitter, wherein: second synchronous serial interface digital brain electrical signal after the transmission modulation that links to each other with the brain wave acquisition module, the less radio-frequency transmitter transmission of digital EEG signals that links to each other with second synchronous serial interface, the PC receiver module transmission of digital EEG signals that links to each other with the less radio-frequency transmitter.
Described less radio-frequency transmitter is meant the radio frequency duplexer based on the Zigbee agreement.
Described PC receiver module comprises: less radio-frequency receptor, USB interface and brain electricity read the analysis submodule, wherein: the less radio-frequency receptor transmission of digital EEG signals that links to each other with the RF wireless transport module, the less radio-frequency receptor transmission of digital EEG signals that links to each other with USB interface, USB interface and brain electricity read analyzes the submodule transmission of digital EEG signals that links to each other.
Described less radio-frequency receptor is meant the radio frequency duplexer based on the Zigbee agreement.
Compared with prior art, beneficial effect of the present invention is: can carry out real-time brain wave acquisition to it under the toy active state, and very be fit to long-term continual eeg monitoring, can provide more accurate and comprehensive experimental data for correlational study; The package unit cost is lower simultaneously, is very suitable for laboratory and uses, and very strong application is arranged.The present invention selects for use two two passages collection EEG signals of leading greatly to simplify hardware circuit design; Utilize the Zigbee agreement to carry out wireless transmission and solved existing design receiving circuit complicated problems; The various piece design of device all can select for use the chip of low-power consumption to finish function corresponding.Whole device volume is little, and is in light weight, and power consumption is little, very convenient, accurate in the electroencephalograpof of small animals signals collecting experiment of reality.
Description of drawings
Fig. 1 is that embodiment device is formed sketch map;
Wherein: the 1-electrode; 2-brain wave acquisition module; The 3-RF wireless transport module; The 4-PC receiver module; The 5-first preposition differential amplification submodule; The 6-second preposition differential amplification submodule; The 7-first main amplification filtering submodule; The 8-second main amplification filtering submodule; The 9-level is adjusted submodule; 10-analog digital conversion submodule; The 11-central processing unit; 12-first synchronous serial interface; 13-second synchronous serial interface; 14-less radio-frequency transmitter; 15-less radio-frequency receptor; The 16-USB interface; 17-brain electricity reads the analysis submodule; The 18-power module.
The specific embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
Present embodiment is used to gather the EEG signals of rat, as shown in Figure 1, present embodiment comprises: electrode 1, brain wave acquisition module 2, RF wireless transport module 3, power module 18 and PC receiver module 4, wherein: electrode 1 is arranged on the head of tested rat by cingulum, brain wave acquisition module 2 and RF wireless transport module 3 are arranged on the back of tested rat by cingulum, electrode 1 links to each other with brain wave acquisition module 2 and transmits original EEG signals, the brain wave acquisition module 2 digital brain electrical signal after the transmission modulation that links to each other with RF wireless transport module 3, the RF wireless transport module 3 transmission of digital EEG signals that links to each other with PC receiver module 4, the digital brain electrical signal that is obtained by 4 pairs of PC receiver modules carries out subsequent treatment, and power module 18 links to each other with RF wireless transport module 3 with brain wave acquisition module 2 respectively and transmits power information.
Described electrode 1 comprises: two two lead passage (CH1+, CH1-, CH2+ and CH2-) and reference electrodes, wherein: two two passages that lead are separately positioned on the head of tested rat and link to each other with brain wave acquisition module 2 respectively and transmit original EEG signals, and reference electrode is arranged on the head of rat and links to each other with earth terminal in the brain wave acquisition module 2.
Described power module 18 is button cells.
Described brain wave acquisition module 2 comprises: two preposition differential amplification submodules, two main amplification filtering submodules, level is adjusted submodule 9, analog digital conversion submodule 10, the central processing unit 11 and first synchronous serial interface 12, wherein: the input of the first preposition differential amplification submodule 5 and first couple of passage (CH1+ that leads, CH1-) the original EEG signals of continuous transmission, the input of the second preposition differential amplification submodule 6 links to each other with second pair of passage that leads (CH2+ and CH2-) and transmits original EEG signals, reference electrode links to each other with the earth terminal of central processing unit 11 and transmits reference electrode information, the outfan of the first preposition differential amplification submodule 5 EEG signals of transmission after amplifying that link to each other with the input of the first main amplification filtering submodule 7, the outfan of the second preposition differential amplification submodule 6 EEG signals of transmission after amplifying that link to each other with the input of the second main amplification filtering submodule 8, the outfan of two main amplification filtering submodules all links to each other with analog digital conversion submodule 10 and transmits filtered EEG signals, level adjustment submodule 9 links to each other with main amplification filtering submodule with preposition differential amplification submodule respectively and transmits bias voltage, the analog digital conversion submodule 10 digital brain electrical signal that links to each other with central processing unit 11, the central processing unit 11 transmission of digital EEG signals that links to each other with first synchronous serial interface 12, the first synchronous serial interface 12 digital brain electrical signal after the transmission modulation that links to each other with RF wireless transport module 3, power module 18 links to each other with central processing unit 11 and transmits power information.
Described preposition differential amplification submodule adopts the differential amplification of INA2321 instrument amplifier realization to EEG signals.
Described main amplification filtering submodule adopts integrated operational amplifier 0PA2336 and the inner integrated operational amplifier of microcontroller MSP430.
Described level adjusts submodule 9 and analog-to-digital conversion module 10 adopts microcontroller MSP430 to realize providing bias voltage and analog-to-digital function.
Described central processing unit 11 adopts modulation and the output of the interior central processing unit realization of microcontroller MSP430 to the EEG signals after the analog digital conversion.
Described RF wireless transport module 3 comprises: second synchronous serial interface 13 and less radio-frequency transmitter 14, wherein: the second synchronous serial interface 13 digital brain electrical signal after the transmission modulation that links to each other with first synchronous serial interface 12, the less radio-frequency transmitter 14 transmission of digital EEG signals that links to each other with second synchronous serial interface 13, the PC receiver module 4 transmission of digital EEG signals that links to each other with less radio-frequency transmitter 14, the power module 18 transmission power information that links to each other with less radio-frequency transmitter 14.
Described less radio-frequency transmitter 14 is meant the radio frequency duplexer based on the Zigbee agreement, and present embodiment adopts the CC2500 chip to realize the wireless transmission of eeg data.
Described PC receiver module 4 comprises: less radio-frequency receptor 15, usb 16 and brain electricity read analyzes submodule 17, wherein: the less radio-frequency receptor 15 transmission of digital EEG signals that links to each other with less radio-frequency transmitter 14, the less radio-frequency receptor 15 transmission of digital EEG signals that links to each other with usb 16, usb 16 and brain electricity read analyzes the submodule 17 transmission of digital EEG signals that links to each other.
Described less radio-frequency receptor 15 is meant the radio frequency duplexer based on the Zigbee agreement, and present embodiment adopts the CC2500 chip to realize the wireless receiving of eeg data.
The work process of present embodiment: the head that electrode 1 is fixed on tested rat, brain wave acquisition module 2 is gathered the rat brain signal of telecommunication, after amplification, filtering and analog-to-digital conversion, the digital brain electrical signal that obtains is passed to PC receiver module 4 on the PC through RF wireless transport module 3, and the brain electricity of experimenter by PC receiver module 4 reads to be analyzed 17 pairs of EEG signals of submodule and observes, stores and further analyzing and processing.
The advantage of present embodiment: at the rat brain wave acquisition, do not adopt the 12 lead technology but select for use two leading, further reduced the volume of device; The mode that the signal transmission adopts modularity to insert, volume has obtained better controlled, and the volume of the whole device of present embodiment can be controlled in the 24.5mm*14.2mm*8.0mm, and very convenient rat is carried collection; Secondly, selected chip is the low-power consumption chip in the present embodiment circuit: the used INA2321 instrument amplifier of preposition differential amplification submodule has the control low-power consumption mode able to programme that is lower than 1uA; Electric current was 160uA when microcontroller MSP430 normally moved, and only was 0.1uA when standby; CC2500 is equally based on low power dissipation design, and it is the 3V button cell power supply of 560mAh that the present embodiment device is selected capacity for use, at least can uninterrupted recording rat brain electricity 37 hours.

Claims (3)

1. wireless mobile real-time acquisition device for electroencephalograpof of small animals, comprise: electrode, the brain wave acquisition module, the RF wireless transport module, power module and PC receiver module, wherein: electrode is arranged on the head of tested toy, electrode links to each other with the brain wave acquisition module and transmits original EEG signals, the brain wave acquisition module digital brain electrical signal after the transmission modulation that links to each other with the RF wireless transport module, the RF wireless transport module transmission of digital EEG signals that links to each other with the PC receiver module, power module links to each other with the RF wireless transport module with the brain wave acquisition module respectively and transmits power information, it is characterized in that
Described electrode comprises: two two lead passage and reference electrodes, wherein: two two passages that lead are separately positioned on the head of tested toy and the original EEG signals of transmission that links to each other with the brain wave acquisition module respectively, and reference electrode is arranged on the tested toy and links to each other with the brain wave acquisition module and transmits reference electrode information;
Described RF wireless transport module comprises: second synchronous serial interface and less radio-frequency transmitter, wherein: second synchronous serial interface digital brain electrical signal after the transmission modulation that links to each other with the brain wave acquisition module, the less radio-frequency transmitter transmission of digital EEG signals that links to each other with second synchronous serial interface, the PC receiver module transmission of digital EEG signals that links to each other with the less radio-frequency transmitter;
Described brain wave acquisition module comprises: two preposition differential amplification submodules, two main amplification filtering submodules, level is adjusted submodule, the analog digital conversion submodule, the central processing unit and first synchronous serial interface, wherein: the input of two preposition differential amplification submodules all links to each other with electrode and transmits original EEG signals, the outfan of the first preposition differential amplification submodule EEG signals of transmission after amplifying that link to each other with the input of the first main amplification filtering submodule, the outfan of the second preposition differential amplification submodule EEG signals of transmission after amplifying that link to each other with the input of the second main amplification filtering submodule, the outfan of two main amplification filtering submodules all links to each other with the analog digital conversion submodule and transmits filtered EEG signals, level adjustment submodule links to each other with main amplification filtering submodule with preposition differential amplification submodule respectively and transmits bias voltage, the analog digital conversion submodule digital brain electrical signal that links to each other with central processing unit, the central processing unit transmission of digital EEG signals that links to each other with first synchronous serial interface, first synchronous serial interface digital brain electrical signal after the transmission modulation that links to each other with the RF wireless transport module.
2. wireless mobile real-time acquisition device for electroencephalograpof of small animals according to claim 1, it is characterized in that, described PC receiver module comprises: less radio-frequency receptor, USB interface and brain electricity read the analysis submodule, wherein: the less radio-frequency receptor transmission of digital EEG signals that links to each other with the RF wireless transport module, the less radio-frequency receptor transmission of digital EEG signals that links to each other with USB interface, USB interface and brain electricity read analyzes the submodule transmission of digital EEG signals that links to each other.
3. wireless mobile real-time acquisition device for electroencephalograpof of small animals according to claim 2 is characterized in that, described less radio-frequency receptor is meant the radio frequency duplexer based on the Zigbee agreement.
CN201010124352XA 2010-03-16 2010-03-16 Wireless mobile real-time acquisition device for electroencephalograph of small animals Expired - Fee Related CN101766485B (en)

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CN105943032A (en) * 2016-05-26 2016-09-21 复旦大学附属金山医院 A wearable multi-channel wireless cortical electroencephalogram detection device
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