CN107080545A - A kind of lie detection system based on brain electricity - Google Patents
A kind of lie detection system based on brain electricity Download PDFInfo
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- CN107080545A CN107080545A CN201710178669.3A CN201710178669A CN107080545A CN 107080545 A CN107080545 A CN 107080545A CN 201710178669 A CN201710178669 A CN 201710178669A CN 107080545 A CN107080545 A CN 107080545A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
- A61B5/164—Lie detection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
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Abstract
A kind of lie detection system based on brain electricity of disclosure of the invention, belongs to lie detection system field.A kind of lie detection system based on brain electricity, including acquiring brain waves sensing system, eeg signal pretreatment system, eeg signal Feature Extraction System, eeg signal classification model construction system, database support system, Computerized analysis system and calculator display organization.It, which can be realized, utilizes AR model treatment interference signals, and using AR models and the adaptive predictor based on arma modeling effectively evades the error that interference signal is caused, eliminate disturbing factor, gather the data-signal of the strong subject that lies of subject and psychological quality by force that do not lie of multiple psychological qualities respectively using the system simultaneously, substantial amounts of characteristic information will be gathered to be stored in data storage system, the data-signal of suspect will be gathered by Computerized analysis system and the data-signal of subject carries out com-parison and analysis, so as to provide the result of detecting a lie of rationalization.
Description
Technical field
Invention is related to lie detection system field, more specifically to a kind of lie detection system based on brain electricity.
Background technology
A lie detector is a kind of instrument for recording multinomial physiological reaction, can be used for assisting investigation in crime survey, so that
Judge whether it is related to punishment case, analysing whether to lie using brain wave collector collection brain wave is also applied, but for
The degree of accuracy is not high when the strong trained suspect of psychological quality detects a lie, on the one hand because brain wave is easily by environmental factor
Interference causes degree of accuracy decline of detecting a lie, on the other hand for the strong suspect of psychological quality because the information content that can be referred to compares
Few, not very clearly, the fluctuation only according to brain wave is difficult to accurate judgement to feature.
The content of the invention
1. the technical problem to be solved
The not high problem of the degree of accuracy, invention during for being detected a lie present in prior art to the strong trained suspect of psychological quality
Purpose be to provide a kind of lie detection system based on brain electricity, it can realize that trained suspect strong to psychological quality surveys
The degree of accuracy is high during lie.
2. technical scheme
To solve the above problems, invention is adopted the following technical scheme that.
It is a kind of based on brain electricity lie detection system, including acquiring brain waves sensing system, eeg signal pretreatment system,
Eeg signal Feature Extraction System, eeg signal classification model construction system, database support system, Computerized analysis system and
Calculator display organization, the acquiring brain waves sensing system, eeg signal pretreatment system, eeg signal feature are carried
System, eeg signal classification model construction system is taken to be sequentially connected, the eeg signal classification model construction system and database are supported
System is connected with Computerized analysis system, and the Computerized analysis system is connected with calculator display organization, the brain wave
Signal pre-processing system includes removing interference Wavelet Transformation Algorithm, AR models and the adaptive predictor based on AR models, the number
According to storehouse support that system includes data storage system, it is strong that the acquiring brain waves sensing system gathers a large amount of psychological qualities respectively
Do not lie the eeg signal of the subject that lies of subject and psychological quality by force, the data storage system stores psychology respectively
The strong treated eeg signal of the subject that lies of subject and psychological quality by force of not lying of quality, the computer point
Analysis system includes data extractor, data sink and data comparator, and acquiring brain waves sensing system gathers EEG signals,
Interference signal disturbs Wavelet Transformation Algorithm preliminary treatment interference signal by going, and using AR model treatment interference signals, and utilizes
AR models and adaptive predictor based on AR models effectively evade the error that interference signal is caused, and eliminate disturbing factor, simultaneously
Gather the data of the strong subject that lies of subject and psychological quality by force that do not lie of multiple psychological qualities respectively using the system
Signal, will gather substantial amounts of characteristic information and is stored in data storage system, suspect will be gathered by Computerized analysis system
Data-signal and subject data-signal carry out com-parison and analysis, so as to provide the result of detecting a lie of rationalization.
Preferably, the acquiring brain waves sensing system uses 3 conductive electrode sensors, pre-amplification circuit, filtered electrical
Road and AD converter, 3 are led after brain electrode sensor collection signal, and faint EEG signals are put by pre-amplification circuit
Greatly, processing is filtered to original EEG signals by filter circuit, signal is converted into data signal by 16 bit A/D converters.
Preferably, the filter circuit is made up of low pass circuit and trap circuit, and trap circuit effectively tackles brain telecommunications
Number collection when Hz noise.
Preferably, the eeg signal classification model construction system uses the number of newest " 973 " project analysis of experimental data
According to index parameter based on model, the data model of the huge experimental data system of " 973 " project has precision height, data mould
The low feature of disequilibrium of type, user is understandable easy-to-use, can carry out cross validation with data with existing, further increase and detect a lie
The degree of accuracy.
Preferably, the acquiring brain waves sensing system is counted using bluetooth 2.0 EEG signals collected sending into brain
EEG signals are sent into computer, efficiency of transmission is high by electric wave signal pretreatment system by bluetooth 2.0.
Preferably, calculator display organization is histogrammic dynamic using the index such as EEG power spectrum array of figure or brain electricity θ, α, β
State is shown, realizes that the electric index of brain is real-time by the histogrammic Dynamic Announce of index such as EEG power spectrum array of figure or brain electricity θ, α, β
Monitoring, intuitively, grasps suspect's cerebral functional lateralitv exactly.
3. beneficial effect
Compared to prior art, the advantage of invention is：
（1）The acquiring brain waves sensing system collection EEG signals of this programme, interference signal is by going interference wavelet transformation to calculate
Method preliminary treatment interference signal, using AR model treatment interference signals, and using AR models and based on the adaptive pre- of AR models
Survey device and effectively evade the error that interference signal is caused, eliminate disturbing factor, while gathering multiple psychology elements respectively using the system
The strong subject that lies of subject and psychological quality by force that do not lie of matter, will gather substantial amounts of characteristic information and is stored in data storage
In system, the data-signal of suspect will be gathered by Computerized analysis system and the data-signal of subject carries out analysis ratio
Compared with so as to provide the result of detecting a lie of rationalization.
（2）3 are led after brain electrode sensor collection signal, and faint EEG signals are put by pre-amplification circuit
Greatly, processing is filtered to original EEG signals by filter circuit, signal is converted into data signal by 16 bit A/D converters.
（3）Trap circuit effectively tackles Hz noise during eeg signal acquisition.
（4）The data model of the huge experimental data system of " 973 " project has precision height, the disequilibrium of data model
Low feature, user is understandable easy-to-use, can carry out cross validation with data with existing, further increase the degree of accuracy of detecting a lie.
（5）EEG signals are sent into by computer by bluetooth 2.0, efficiency of transmission is high.
（6）The electric index of brain is realized by the histogrammic Dynamic Announce of index such as EEG power spectrum array of figure or brain electricity θ, α, β
Monitoring in real time, intuitively, grasps suspect's cerebral functional lateralitv exactly.
Brief description of the drawings
Fig. 1 is systematic schematic diagram of the invention；
Fig. 2 is acquiring brain waves sensing system block diagram of the invention；
Fig. 3 is eeg signal pretreatment system schematic diagram of the invention；
Fig. 4 supports system block diagram for the database of the present invention；
Fig. 5 is Computerized analysis system block diagram of the invention.
Embodiment
Below in conjunction with the accompanying drawing in inventive embodiments；Technical scheme in inventive embodiments is carried out clearly and completely
Description；Obviously；Described embodiment is only a part of embodiment of invention；Rather than whole embodiments.Based in invention
Embodiment；The every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made；
Belong to the scope of invention protection.
Embodiment 1：
Fig. 1-5 are referred to, a kind of lie detection system based on brain electricity, including acquiring brain waves sensing system, eeg signal are pre-
Processing system, eeg signal Feature Extraction System, eeg signal classification model construction system, database support system, computer
Analysis system and calculator display organization, acquiring brain waves sensing system, eeg signal pretreatment system, eeg signal
Feature Extraction System, eeg signal classification model construction system are sequentially connected, eeg signal classification model construction system and database branch
Hold system with Computerized analysis system to be connected, Computerized analysis system is connected with calculator display organization, and eeg signal is pre-
Processing system includes removing interference Wavelet Transformation Algorithm, AR models and the adaptive predictor based on AR models, and database supports system
System includes data storage system, acquiring brain waves sensing system gather respectively a large amount of psychological qualities it is strong do not lie subject with
The eeg signal of the subject that lies of psychological quality by force, data storage system store respectively psychological quality it is strong do not lie tested
The treated eeg signal of the subject that lies of person and psychological quality by force, Computerized analysis system include data extractor,
Data sink and data comparator, acquiring brain waves sensing system collection EEG signals, interference signal is by going interference small
Wave conversion algorithmic preliminaries handle interference signal, using AR model treatment interference signals, and using AR models and based on AR models
Adaptive predictor effectively evades the error that interference signal is caused, and disturbing factor is eliminated, while gathering many respectively using the system
The data-signal of the strong subject that lies of subject and psychological quality by force that do not lie of individual psychological quality, will gather substantial amounts of feature
Information is stored in data storage system, by Computerized analysis system by gather suspect data-signal and subject number
It is believed that number progress com-parison and analysis, so as to provide the result of detecting a lie of rationalization.
Acquiring brain waves sensing system uses 3 conductive electrode sensors, pre-amplification circuit, filter circuit and AD conversion
Device, 3 are led after brain electrode sensor collection signal, and faint EEG signals are amplified by pre-amplification circuit, pass through filter
Wave circuit is filtered processing to original EEG signals, and signal is converted into data signal, filter circuit by 16 bit A/D converters
It is made up of low pass circuit and trap circuit, trap circuit effectively tackles Hz noise during eeg signal acquisition, brain wave letter
Number classification model construction system is using index parameter, " 973 " based on the data model of newest " 973 " project analysis of experimental data
The data model of the huge experimental data system of project has precision height, the low feature of disequilibrium of data model, Yong Huyi
Understand easy-to-use, cross validation can be carried out with data with existing, the degree of accuracy of detecting a lie, acquiring brain waves sensing system is further increased
Counted using bluetooth 2.0 and the EEG signals collected are sent into eeg signal pretreatment system, by bluetooth 2.0 by EEG signals
Computer is sent into, efficiency of transmission is high, and calculator display organization uses the index Nogata such as EEG power spectrum array of figure or brain electricity θ, α, β
The Dynamic Announce of figure, realizes that brain electricity refers to by the histogrammic Dynamic Announce of index such as EEG power spectrum array of figure or brain electricity θ, α, β
Mark monitoring in real time, intuitively, grasps suspect's cerebral functional lateralitv exactly.
Operation principle：Strong do not lie subject and the psychological quality of multiple psychological qualities is gathered by the system respectively first
Strong subject data signal of lying, will gather substantial amounts of characteristic information and is stored in data storage system, so as to be configured to one
Individual rational database supports system, when the suspect strong to psychological quality detects a lie, passes through acquiring brain waves sensing system
Eeg signal is gathered, and the signal of collection is sent to eeg signal pretreatment system by bluetooth 2.0, by disturbing small echo
Convert algorithmic preliminaries processing interference signal, using AR model treatment interference signals, and using AR models and based on AR models from
Adaptive prediction device effectively evades the error that interference signal is caused, and eliminates disturbing factor, the eeg signal of pretreatment is passed through into brain
Signal characteristics extraction system extracts substantial amounts of characteristic information, using the data mould of newest " 973 " project analysis of experimental data
The data sink that index parameter is carried out in classification model construction, Computerized analysis system based on type receives modeling information, and leads to
The mass data information crossed in data extractor extraction database support system, utilizes data analysis comparator com-parison and analysis suspicion
The brain electric information of people and the brain electric information of subject, and shown by calculator display organization, so as to provide detecting a lie for rationalization
As a result.
It is described above, only invention preferably embodiment；But the protection domain of invention is not limited thereto；It is any
Those familiar with the art is in the technical scope that invention is disclosed；According to the technical scheme of invention and its improvement design
It is subject to equivalent substitution or change；It should all cover in the protection domain of invention.
Claims (6)
1. a kind of lie detection system based on brain electricity, it is characterised in that：It is pre- including acquiring brain waves sensing system, eeg signal
Processing system, eeg signal Feature Extraction System, eeg signal classification model construction system, database support system, computer
Analysis system and calculator display organization, the acquiring brain waves sensing system, eeg signal pretreatment system, brain wave
Signal characteristic abstraction system, eeg signal classification model construction system are sequentially connected, the eeg signal classification model construction system and
Database supports system to be connected with Computerized analysis system, and the Computerized analysis system is connected with calculator display organization,
The eeg signal pretreatment system includes removing interference Wavelet Transformation Algorithm, AR models and the adaptive prediction based on AR models
Device, the database supports system to include data storage system, and the acquiring brain waves sensing system gathers a large amount of hearts respectively
Manage the eeg signal of the strong subject that lies of subject and psychological quality by force that do not lie of quality, the data storage system point
Cun Chu not psychological quality strong the do not lie treated eeg signal of the subject that lies of subject and psychological quality by force, institute
Stating Computerized analysis system includes data extractor, data sink and data comparator.
2. a kind of lie detection system based on brain electricity according to claim 1, it is characterised in that：The acquiring brain waves sensing
Device system uses 3 conductive electrode sensors, pre-amplification circuit, filter circuit and AD converter.
3. a kind of lie detection system based on brain electricity according to claim 2, it is characterised in that：The filter circuit is by low pass
Circuit and trap circuit composition.
4. a kind of lie detection system based on brain electricity according to claim 1, it is characterised in that：The eeg signal classification
Modeling is using index parameter based on the data model of newest " 973 " project analysis of experimental data.
5. a kind of lie detection system based on brain electricity according to claim 1 or 2, it is characterised in that：The acquiring brain waves
Sensing system is counted using bluetooth 2.0 EEG signals collected sending into eeg signal pretreatment system.
6. a kind of lie detection system based on brain electricity according to claim 1, it is characterised in that：Calculator display organization is used
The histogrammic Dynamic Announce of index such as EEG power spectrum array of figure or brain electricity θ, α, β.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107510888A (en) * | 2017-08-17 | 2017-12-26 | 天津大学 | The local field potentials for removing DBS artefacts based on DSP+FPGA test and analyze platform in real time |
| CN108403112A (en) * | 2018-04-02 | 2018-08-17 | 东北电力大学 | The method for carrying out organoleptic substances classification based on smell brain wave and GS-SVM |
| CN108836325A (en) * | 2018-04-02 | 2018-11-20 | 东北电力大学 | A method of organoleptic substances classification is carried out based on smell brain wave and random forest |
| CN110192877A (en) * | 2019-05-24 | 2019-09-03 | 中南民族大学 | Based on the lie detecting method for more leading the EEG signals degree of bias |
| CN110192880A (en) * | 2019-05-24 | 2019-09-03 | 中南民族大学 | Based on the lie detecting method for more leading EEG signals Granger Causality |
| CN113317802A (en) * | 2021-05-21 | 2021-08-31 | 上海六河创意设计有限公司 | Information early warning system and method based on brain waves |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107510888A (en) * | 2017-08-17 | 2017-12-26 | 天津大学 | The local field potentials for removing DBS artefacts based on DSP+FPGA test and analyze platform in real time |
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| CN113317802A (en) * | 2021-05-21 | 2021-08-31 | 上海六河创意设计有限公司 | Information early warning system and method based on brain waves |
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