CN107080545B - 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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- CN107080545B CN107080545B CN201710178669.3A CN201710178669A CN107080545B CN 107080545 B CN107080545 B CN 107080545B CN 201710178669 A CN201710178669 A CN 201710178669A CN 107080545 B CN107080545 B CN 107080545B
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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 error caused by interference signal, 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 to investigate in crime survey, so as to
Judge whether it is related to punishment case, analysing whether to lie using brain wave collector collection brain wave is also applied, but for
Psychological quality when trained suspect detects a lie by force the degree of accuracy it is not high, 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. technical problems to be solved
For the not high problem of degree of accuracy when trained suspect detects a lie by force to psychological quality present in prior art,
The purpose of invention is to provide a kind of lie detection system based on brain electricity, and it can be realized to psychological quality trained suspicion by force
The degree of accuracy is high when people detects a lie.
2. technical scheme
To solve the above problems, invention adopts 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 carry
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 going to disturb Wavelet Transformation Algorithm, AR models and the adaptive predictor based on AR models, the number
According to storehouse system is supported to include data storage system, the acquiring brain waves sensing system gathers a large amount of psychological qualities by force respectively
The eeg signal of the strong subject that lies of subject and the psychological quality of not lying, the data storage system store 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 error caused by interference signal, 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, and 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 is using 3 conductive electrode sensors, pre-amplification circuit, filtered electrical
Road and a/d converter, after 3 lead brain electrode sensor collection signal, 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 features such as disequilibrium of type is low, 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 being sent into brain
Electric wave signal pretreatment system, EEG signals are sent into by computer by bluetooth 2.0, efficiency of transmission is high.
Preferably, calculator display organization is using the dynamic of the index histogram such as EEG power spectrum array of figure or brain electricity θ, α, β
State is shown, realizes that brain electricity index is real-time by the Dynamic Announce of the index histogram such as EEG power spectrum array of figure or brain electricity θ, α, β
Monitoring, intuitively, suspect's cerebral functional lateralitv is grasped exactly.
3. beneficial effect
It is compared to prior art, the advantages of invention：
（1）The acquiring brain waves sensing system collection EEG signals of this programme, interference signal disturb small echo to become by going
Scaling method preliminary treatment interference signal, using AR model treatment interference signals, and using AR models and based on the adaptive of AR models
Answer fallout predictor effectively to evade error caused by interference signal, eliminate disturbing factor, while multiple hearts are gathered respectively using the system
The strong subject that lies of subject and psychological quality by force that do not lie of reason quality, will gather substantial amounts of characteristic information and is stored in data
In stocking system, the data-signal of suspect will be gathered by Computerized analysis system and the data-signal of subject is analyzed
Compare, so as to provide the result of detecting a lie of rationalization.
（2）After 3 lead brain electrode sensor collection signal, 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
The features such as low, 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）Brain electricity index is realized by the Dynamic Announce of the index histogram such as EEG power spectrum array of figure or brain electricity θ, α, β
Monitoring in real time, intuitively, suspect's cerebral functional lateralitv is grasped exactly.
Brief description of the drawings
Fig. 1 is the systematic schematic diagram of the present invention；
Fig. 2 is the acquiring brain waves sensing system block diagram of the present invention；
Fig. 3 is the eeg signal pretreatment system schematic diagram of the present invention；
The database that Fig. 4 is the present invention supports system block diagram；
Fig. 5 is the Computerized analysis system block diagram of the present 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 invention part of the embodiment；Rather than whole embodiment.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：
Refer to Fig. 1-5, a kind of lie detection system based on brain electricity, including acquiring brain waves sensing system, brain wave letter
Number pretreatment system, eeg signal Feature Extraction System, eeg signal classification model construction system, database support system, meter
Calculation machine analysis system and calculator display organization, acquiring brain waves sensing system, eeg signal pretreatment system, brain wave
Signal characteristic abstraction system, eeg signal classification model construction system are sequentially connected, eeg signal classification model construction system and data
Storehouse supports system to be connected with Computerized analysis system, and Computerized analysis system is connected with calculator display organization, brain wave letter
Number pretreatment system includes going to disturb Wavelet Transformation Algorithm, AR models and the adaptive predictor based on AR models, database branch
Holding system includes data storage system, acquiring brain waves sensing system gather respectively a large amount of psychological qualities it is strong do not lie it is tested
The eeg signal of the strong subject that lies of person and psychological quality, data storage system store that psychological quality is strong not to lie respectively
The treated eeg signal of the subject that lies of subject and psychological quality by force, Computerized analysis system include data and extracted
Device, data sink and data comparator, acquiring brain waves sensing system collection EEG signals, interference signal are disturbed by going
Wavelet Transformation Algorithm preliminary treatment interference signal, using AR model treatment interference signals, and using AR models and based on AR models
Adaptive predictor effectively evade error caused by interference signal, eliminate disturbing factor, while gather 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 multiple psychological qualities, will the substantial amounts of spy of collection
Reference breath is stored in data storage system, and data-signal and the subject of suspect will be gathered by Computerized analysis system
Data-signal carries out 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, after 3 lead brain electrode sensor collection signal, 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 based on the data model of newest " 973 " project analysis of experimental data, " 973 "
The data model of the huge experimental data system of project has the characteristics that precision is high, the disequilibrium of data model is low, Yong Huyi
Understand it is easy-to-use, can with data with existing carry out cross validation, further increase the degree of accuracy of detecting a lie, acquiring brain waves sensing system
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, realize that brain electricity refers to by the Dynamic Announce of the index histogram 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 error caused by interference signal, 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
Index parameter carries out classification model construction based on type, and the data sink in Computerized analysis system 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 invent preferable 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 discloses；According to the technical scheme of invention and its improve design
It is subject to equivalent substitution or change；It should all cover in the protection domain of invention.
Claims (5)
- A kind of 1. 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 going to disturb Wavelet Transformation Algorithm, AR models and the adaptive prediction based on AR models Device, the database support system to include data storage system, and the acquiring brain waves sensing system gathers a large amount of hearts respectively The eeg signal of the strong subject that lies of subject and psychological quality by force that do not lie of reason quality, the data storage system point Not Cun Chu psychological quality strong do not lie subject and the strong treated eeg signal of the subject that lies of psychological quality, institute Stating Computerized analysis system includes data extractor, data sink and data comparator.
- A kind of 2. 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 a/d converter.
- A kind of 3. 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.
- A kind of 4. lie detection system based on brain electricity according to claim 1 or 2, it is characterised in that：The acquiring brain waves The EEG signals collected are sent into eeg signal pretreatment system by sensing system using Bluetooth technology.
- A kind of 5. lie detection system based on brain electricity according to claim 1, it is characterised in that：Calculator display organization uses The Dynamic Announce of the index histogram such as EEG power spectrum array of figure or brain electricity θ, α, β.
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| 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 |
| 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 |
| 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 |
| 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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| US5564433A (en) * | 1994-12-19 | 1996-10-15 | Thornton; Kirtley E. | Method for the display, analysis, classification, and correlation of electrical brain function potentials |
| US5957859A (en) * | 1997-07-28 | 1999-09-28 | J. Peter Rosenfeld Ph.D. | Method and system for detection of deception using scaled P300 scalp amplitude distribution |
| EP1518187A1 (en) * | 2002-07-01 | 2005-03-30 | Ognjen Amidzic | Method for drawing up data which can be used to assess cognitive or sensomotor capabilities or capacities of people subjected to a test |
| WO2009052833A1 (en) * | 2007-10-23 | 2009-04-30 | Mindmetic Ltd. | Method, system and computer program for automated interpretation of measurements in response to stimuli |
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