CN202044265U - Electroencephalogram signal acquisition and analysis module - Google Patents
Electroencephalogram signal acquisition and analysis module Download PDFInfo
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- CN202044265U CN202044265U CN2011200912269U CN201120091226U CN202044265U CN 202044265 U CN202044265 U CN 202044265U CN 2011200912269 U CN2011200912269 U CN 2011200912269U CN 201120091226 U CN201120091226 U CN 201120091226U CN 202044265 U CN202044265 U CN 202044265U
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Abstract
The utility model relates to an electroencephalogram signal acquisition and analysis module, which comprises an electroencephalogram signal amplifying circuit and a digital signal processor, wherein the electroencephalogram signal amplifying circuit is provided with an electroencephalogram signal input end and an electroencephalogram signal output end; the digital signal processor is provided with a signal input end and a signal output end; and the electroencephalogram signal output end of the electroencephalogram signal amplifying circuit is connected with the signal input end of the digital signal processor. The module has a small and exquisite structure and high integratability; a digitalized original electroencephalogram signal and a result of advanced analysis processing can be accurately and directly output; and the module is convenient for analysis, comparison and reading and has broad application prospects.
Description
Technical field
This utility model relates to a kind of eeg signal acquisition analysis module, is specifically related to a kind of eeg signal acquisition analysis module that is used for the microminiaturization of human body or the detection of animal electricity physiology tiny signal, belongs to field of medical technology.
Background technology
Because the spontaneous EEG signals of the mankind or animal is extremely faint, it is generally acknowledged in the 5uV-100uV scope, so will accurately gather, analyze EEG signals certain difficulty is arranged; Though the electroencephalograph and the relevant device of EEG signals have occurred being used to gather at present, the existing equipment General System is huge, complex structure, cost height, but has the defective that does not have integration simultaneously; And be merely able to show original electroencephalogram curve or simple analysis result, for the abundant inadequately personnel of most of experiences, the interpretation electroencephalogram also is a relatively thing of difficulty.
The utility model content
In order to overcome the above-mentioned defective of prior art, this utility model provides a kind of eeg signal acquisition analysis module, this modular structure is small and exquisite, but integration height, economical and practical, and can accurately the result after original EEG signals behind the digitized and the depth analysis processing directly be exported, be convenient to contrast, analyze and read.
To achieve these goals, the technical solution adopted in the utility model is: a kind of eeg signal acquisition analysis module, comprise EEG signals amplifying circuit and digital signal processor, described EEG signals amplifying circuit is provided with EEG signals input and EEG signals outfan, described digital signal processor is provided with signal input part and signal output part, and the EEG signals outfan of described EEG signals amplifying circuit connects the signal input part of described digital signal processor.
This eeg signal acquisition analysis module can also comprise the EEG signals input interface that is used to connect the EEG signals electrode wires, described EEG signals amplifying circuit preferably includes the impedance transformer that connects successively, difference amplifier, high pass filter, low pass filter, frequency overlapped-resistable filter and analog-digital converter, the signal input part of described impedance transformer constitutes the EEG signals input of described EEG signals amplifying circuit, and be connected with described EEG signals input interface, the digital signal output end of described analog-digital converter constitutes the EEG signals outfan of described EEG signals amplifying circuit.
Also preferably be provided with wave trap between described high pass filter and the low pass filter, described wave trap is preferably the wave trap that can suppress the 50Hz/60Hz industrial frequency noise, described wave trap be provided be used to switch suppress the software switch or the hardware switch of work frequency.
Described eeg signal acquisition analysis module can also comprise the EEG signals output interface, and the signal output part of described digital signal processor connects described EEG signals output interface, and described EEG signals output interface is preferably UART interface or Ethernet interface.
Can also be provided with the calibration commutation circuit between the signal input part of described impedance transformer and the described EEG signals input interface.
Preferably be provided with digital filter and brain function analysis module in the described digital signal processor, described digital filter can be provided with digital signal input end and first, the two digital signal outfan, the digital signal input end of described digital filter connects the digital signal output end of described analog-digital converter, first digital signal output end of described digital filter connects the processing signals input of described brain function analysis module, second digital signal output end of described digital filter and the processing signals outfan of described brain function analysis module constitute the signal output part of described digital signal processor, and are connected to described EEG signals output interface.
Described eeg signal acquisition analysis module can also comprise the control signal input interface, can also be provided with command decoder in the described digital signal processor, the signal input part of described command decoder connects described control signal input interface, the control signal of described command decoder output is delivered to described wave trap and calibration commutation circuit through control bus, and described EEG signals output interface and control signal input interface are preferably same input/output interface.
Be connected with signal isolator between the signal output part of described digital signal processor and the signal input part of described command decoder and the described input/output interface.
Described eeg signal acquisition analysis module can be provided with a plurality of I/O passages.
Described eeg signal acquisition analysis module can also comprise the power input interface that has power isolation module.
The beneficial effects of the utility model are:
(1) proprietary EEG signals amplifying circuit and digital signal processor are combined into microminiaturized modular structure, can finish all functions such as amplification, filtering, digitized, calibration, digital filtering and analyzing and processing to original EEG signals, small and exquisite, integrated level is high, it is low to compare the digitized electroencephalogram acquisition system cost of realizing said function;
(2) directly export by the original EEG signals and the depth analysis result of proprietary analytical method after, be convenient to staff's contrast, analyze and read, reduce technical ability requirement staff's the original electroencephalogram of interpretation digitized;
(3) by optimizing circuit design, improved, be particularly suitable for the collection and the detection of small-signal the filtering efficient of each noise like and the signal to noise ratio before the analog digital conversion;
(4), conveniently be used to be integrated into other system and use because this module is provided with each class interface of signal input and output.
Description of drawings
Fig. 1 is the structural representation of signal amplification circuit part of the present utility model;
Fig. 2 is the structural representation of digital signal processor part of the present utility model.
The specific embodiment
Referring to Fig. 1 and Fig. 2, this utility model provides a kind of eeg signal acquisition analysis module, this module can be integrated into all kinds of electric physiological detection, in the custodial care facility, to finish detection to human body or animal body electricity physiology tiny signal, it comprises EEG signals amplifying circuit and digital signal processor (DSP), described EEG signals amplifying circuit is provided with EEG signals input and EEG signals outfan, described digital signal processor is provided with signal input part and signal output part, and the EEG signals outfan of described EEG signals amplifying circuit connects the signal input part of described digital signal processor.This modular structure is small and exquisite, self can finish to original EEG signals amplify, all functions such as filtering, digitized and analyzing and processing, the integration height; Cooperate described digital signal processor simultaneously, use proprietary analytical method to finish real-time analysis and processing to EEG signals, display analysis result in real time not only, but also can carry out trend analysis, it is high-visible that brain function is changed, and helps clinical instant diagnosis and treatment and monitoring; And its analytical method (comprising analysis of spectrum, compressed spectrum array, peripheral spectrum and amplitude-frequency integration trend etc.) advanced person, utilize the amplitude-frequency integration analysis technology of original creation that the EEG signals of gathering is carried out analyzing and processing, and with three-dimensional spectrum display analysis result, the result is clear, contain much information, especially be convenient to the abundant inadequately staff of experience and discern and read, reduce technical ability requirement staff's the original electroencephalogram of interpretation.
This eeg signal acquisition analysis module can also comprise the EEG signals input interface that is used to connect the EEG signals electrode wires, the signals collecting end of described EEG signals electrode wires adopts suitable mode to connect tested human or animal's scalp, be used to gather human or animal's EEG signals, and import EEG signals by described EEG signals input interface and arrive described eeg signal acquisition analysis module, to carry out a series of analyses and processing, described EEG signals amplifying circuit generally includes the impedance transformer that connects successively, difference amplifier, high pass filter, wave trap, low pass filter, frequency overlapped-resistable filter and analog-digital converter (ADC), described difference amplifier be preferably and have high input impedance (＞=1G1-30Hz), (＞=110dB1-30Hz) zero shift difference amplifier is to improve its interference free performance of signal to external world for high cmrr; The signal input part of described impedance transformer constitutes the EEG signals input of described EEG signals amplifying circuit, and be connected with described EEG signals input interface, can also be provided with the calibration commutation circuit between the signal input part of described impedance transformer and the described EEG signals input interface.The digital signal output end of described analog-digital converter constitutes the EEG signals outfan of described EEG signals amplifying circuit.Described EEG signals amplifying circuit has characteristics such as filtering efficient height to each noise like, the signal to noise ratio before the analog digital conversion (signal to noise ratio is high more to show that the noise of generation is few more) height, to be fit to the collection and the detection of small-signal.
Because systems exist worldwide is at the work frequency (50HZ and 60HZ) of two kinds of specifications, country for the ease of different power frequencies uses, described wave trap is preferably the wave trap that can suppress the 50Hz/60Hz industrial frequency noise, described wave trap be provided be used to switch suppress the software switch of work frequency or hardware switch and carry out frequency and switch.
This eeg signal acquisition analysis module can also comprise the EEG signals output interface, the signal output part of described digital signal processor is connected with described EEG signals output interface, described signal output interface is preferably UART interface or Ethernet interface, facilitates the use UART serial bus or Ethernet netting twine described eeg signal acquisition analysis module is connected with equipment such as other electrophysiologic monitorings or monitoring.
Preferably be provided with digital filter and brain function analysis module in the described digital signal processor, described digital filter is provided with digital signal input end and first, the two digital signal outfan, the digital signal input end of described digital filter connects the digital signal output end of described analog-digital converter, first digital signal output end of described digital filter connects the processing signals input of described brain function analysis module, to finish the real-time analysis of EEG signals is handled, the processing signals outfan of described brain function analysis module is connected to described EEG signals output interface, with the EEG signals after the output analyzing and processing, direct and the described EEG signals output interface of second digital signal output end of described digital filter is connected, so that export original EEG signals; Thus can be by two kinds of EEG signals output results' contrast, analysis, more clear, find out the signal after handling through proprietary analytical method of the present utility model and the difference of primary signal intuitively; For the abundant inadequately personnel of most of experiences, also easily interpretation.Can revise the parameter of described digital filter simultaneously by software command flexibly, to satisfy the needs of different purposes.
Also be provided with relief area and command decoder in the described digital signal processor, described command decoder is an important front-end control facilities, the control signal of described command decoder output is delivered to described wave trap and described calibration commutation circuit through control bus, so that switch the work frequency of described wave trap and the input parameter of the described calibration commutation circuit of adjustment according to control signal; In order to improve integration, described EEG signals output interface and control signal input interface are preferably same input/output interface.
Preferably be connected with signal isolator between the signal output part of described digital signal processor and the signal input part of described command decoder and the described input/output interface.The Capacitance Coupled device that it is 4000VDC that described signal is isolated preferred employing isolation is finished.
Described eeg signal acquisition analysis module preferably is provided with a plurality of I/O passages, makes things convenient for multi pass acquisition and output.
Described eeg signal acquisition analysis module also comprises the power input interface that has power isolation module usually.Described power isolation module is preferably used the DC/DC power module with UL authentication of isolation as 3000VDC (1 minute).
This utility model structure is small and exquisite, but the integration height is economical and practical, can accurately original EEG signals behind the digitized and depth analysis result be exported simultaneously, is convenient to analyze, contrast and read, and has broad application prospects.
Claims (10)
1. eeg signal acquisition analysis module, it is characterized in that comprising EEG signals amplifying circuit and digital signal processor, described EEG signals amplifying circuit is provided with EEG signals input and EEG signals outfan, described digital signal processor is provided with signal input part and signal output part, and the EEG signals outfan of described EEG signals amplifying circuit connects the signal input part of described digital signal processor.
2. eeg signal acquisition analysis module as claimed in claim 1, it is characterized in that also comprising the EEG signals input interface that is used to connect the EEG signals electrode wires, described EEG signals amplifying circuit comprises the impedance transformer that connects successively, difference amplifier, high pass filter, low pass filter, frequency overlapped-resistable filter and analog-digital converter, the signal input part of described impedance transformer constitutes the EEG signals input of described EEG signals amplifying circuit, and be connected with described EEG signals input interface, the digital signal output end of described analog-digital converter constitutes the EEG signals outfan of described EEG signals amplifying circuit.
3. eeg signal acquisition analysis module as claimed in claim 2, it is characterized in that also being provided with between described high pass filter and the low pass filter wave trap, described wave trap be for can suppressing the wave trap of 50Hz/60Hz industrial frequency noise, described wave trap be provided be used to switch suppress the software switch or the hardware switch of work frequency.
4. eeg signal acquisition analysis module as claimed in claim 3, it is characterized in that also comprising the EEG signals output interface, the signal output part of described digital signal processor connects described EEG signals output interface, and described EEG signals output interface is UART interface or Ethernet interface.
5. eeg signal acquisition analysis module as claimed in claim 4 is characterized in that also being provided with the calibration commutation circuit between the signal input part of described impedance transformer and the described EEG signals input interface.
6. as claim 1,2,3,4 or 5 described eeg signal acquisition analysis modules, it is characterized in that being provided with in the described digital signal processor digital filter and brain function analysis module, described digital filter is provided with digital signal input end and first, the two digital signal outfan, the digital signal input end of described digital filter connects the digital signal output end of described analog-digital converter, first digital signal output end of described digital filter connects the processing signals input of described brain function analysis module, second digital signal output end of described digital filter and the processing signals outfan of described brain function analysis module constitute the signal output part of described digital signal processor, and are connected to described EEG signals output interface.
7. eeg signal acquisition analysis module as claimed in claim 6, it is characterized in that also comprising the control signal input interface, also be provided with command decoder in the described digital signal processor, the signal input part of described command decoder connects described control signal input interface, the control signal of described command decoder output is delivered to described wave trap and calibration commutation circuit through control bus, and described EEG signals output interface and control signal input interface are same input/output interface.
8. eeg signal acquisition analysis module as claimed in claim 7 is characterized in that being connected with signal isolator between the signal input part of the signal output part of described digital signal processor and described command decoder and the described input/output interface.
9. eeg signal acquisition analysis module as claimed in claim 8 is characterized in that being provided with a plurality of I/O passages.
10. eeg signal acquisition analysis module as claimed in claim 9 is characterized in that also comprising the power input interface that has power isolation module.
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| CN2011200912269U CN202044265U (en) | 2011-03-31 | 2011-03-31 | Electroencephalogram signal acquisition and analysis module |
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| CN2011200912269U CN202044265U (en) | 2011-03-31 | 2011-03-31 | Electroencephalogram signal acquisition and analysis module |
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| CN202044265U true CN202044265U (en) | 2011-11-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102894973A (en) * | 2012-09-25 | 2013-01-30 | 浙江大学 | ECoG (electrocorticogram) signal amplifier |
| CN103479352A (en) * | 2013-09-30 | 2014-01-01 | 无锡赛思汇智科技有限公司 | Electroencephalogram signal monitoring device and electroencephalogram signal collection method |
| CN110930973A (en) * | 2019-12-19 | 2020-03-27 | 上海宏桐实业有限公司 | Electrophysiological signal noise control method |
-
2011
- 2011-03-31 CN CN2011200912269U patent/CN202044265U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102894973A (en) * | 2012-09-25 | 2013-01-30 | 浙江大学 | ECoG (electrocorticogram) signal amplifier |
| CN102894973B (en) * | 2012-09-25 | 2014-05-21 | 浙江大学 | ECoG (electrocorticogram) signal amplifier |
| CN103479352A (en) * | 2013-09-30 | 2014-01-01 | 无锡赛思汇智科技有限公司 | Electroencephalogram signal monitoring device and electroencephalogram signal collection method |
| CN110930973A (en) * | 2019-12-19 | 2020-03-27 | 上海宏桐实业有限公司 | Electrophysiological signal noise control method |
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Granted publication date: 20111123 Termination date: 20140331 |