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Electroencephalogram-based polygraph system

A technology of EEG and EEG, applied in diagnostic recording/measurement, medical science, psychological devices, etc., can solve the problems of low accuracy, achieve low imbalance, high precision, and improve the accuracy of lie detection

Active Publication Date: 2017-08-22
LANZHOU UNIVERSITY
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem in the prior art that the accuracy of polygraph detection for the trained suspects with strong psychological quality is not high, the purpose of the invention is to provide a polygraph system based on EEG, which can realize the detection of the suspects with strong psychological quality. Accuracy in lie detection of suspects

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  • Electroencephalogram-based polygraph system
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  • Electroencephalogram-based polygraph system

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Embodiment 1

[0028] see Figure 1-5 , an EEG-based lie detection system, including an EEG acquisition sensor system, an EEG signal preprocessing system, an EEG signal feature extraction system, an EEG signal classification modeling system, a database support system, a computer analysis system and a computer display System, brain wave acquisition sensor system, brain wave signal preprocessing system, brain wave signal feature extraction system, brain wave signal classification modeling system are connected in sequence, brain wave signal classification modeling system and database support system are connected with computer analysis system, The computer analysis system is connected with the computer display system. The brain wave signal preprocessing system includes the interference-removing wavelet transform algorithm, the AR model and the adaptive predictor based on the AR model. The database support system includes the data storage system, and the brain wave acquisition sensor system collec...

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Abstract

The invention discloses an electroencephalogram-based polygraph system, and belongs to the field of polygraph systems. The electroencephalogram-based polygraph system comprises an electroencephalogram collection sensor system, an electroencephalogram signal preprocessing system, an electroencephalogram signal feature extraction system, an electroencephalogram signal classification modeling system, a database supporting system, a computer analysis system, and a computer display system. The electroencephalogram-based polygraph system can realize the utilization of an AR model for processing interference signals, and the AR model and an adaptive predictor based on an ARMA model are used for effectively avoiding errors caused by the interference signals so as to eliminate interference factors, at the same time, the system collects data signals from a plurality of not-lying subjects with high psychological quality and a plurality of lying subjects with high psychological quality respectively, the collected data are stored in a data storage system, and the data signals from the suspects and the subjects are analyzed and compared by a computer analysis system so as to obtain a rationalized polygraph result.

Description

technical field [0001] The invention relates to the field of lie detection systems, and more specifically, relates to a lie detection system based on brain electricity. Background technique [0002] A lie detector is an instrument that records multiple physiological reactions, and can be used in criminal investigations to assist in interrogation, so as to determine whether it is involved in a criminal case. Using brain wave acquisition devices to collect brain waves and analyze whether they are lying is also used, but for The accuracy of polygraph detection is not high for well-trained suspects with strong psychological quality. On the one hand, the accuracy of polygraph detection decreases because brain waves are easily disturbed by environmental factors. Relatively few, the characteristics are not very clear, and it is difficult to accurately judge only based on the fluctuation of brain waves. Contents of the invention [0003] 1. Technical problems to be solved [000...

Claims

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Application Information

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IPC IPC(8): A61B5/16A61B5/0476
CPCA61B5/164A61B5/316A61B5/369
Inventor 胡斌蔡涵书
Owner LANZHOU UNIVERSITY
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