Multichannel concealment lie-detection method based on ballistocardiogram signals

Abstract

The invention provides a multichannel concealment lie-detection method based on ballistocardiogram signals. The multichannel hidden lie-detection method based on the ballistocardiogram signals comprises the following steps that S100, BCG signals and GSR signals are amplified, and the BCG signals and the GSR signals and other signals are extracted; a BCG signal and a GSR signal of a subject are synchronously obtained in real time through a polyvinylidene fluoride piezoelectric film sensor and a GSR signal sensor produced by the Seed studio company, synchronous amplification processing is carried out through an amplification circuit, and meanwhile a voice signal and a video signal of the subject are further collected. The multichannel hidden lie-detection system based on the ballistocardiogram signals is reasonable in design, simple in structure of used equipment, mature in technology, convenient to carry and low in development cost; the physiological and behavioral difference of the subject can be greatly included, the anti-interference capability of multiple signals is enhanced, and even if one signal is interfered, other signals can accurately acquire related information.

Description

technical field [0001] The invention relates to the technical field of non-inductive lie detection, in particular to a multi-channel covert lie detection method based on cardiac shock signals. Background technique [0002] To lie is to try to mislead others by using words that are not true. The rapid development of science and technology in today's era, the intelligence of criminal tools and the concealment of criminal methods make it increasingly difficult to obtain evidence in cases. Therefore, the verification and identification of confessions has become the key to breakthroughs in cases. Therefore, a practical and scientific polygraph method is particularly important, which can not only speed up the efficiency of case handling, but also save manpower and material resources. [0003] Traditional polygraph technology mainly uses skin electrical activity level indicators, heart rate mean and heart rate variability indicators as physiological measures. If it is greater tha...

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Problems solved by technology

[0010] In order to overcome the defects in the above-mentioned prior art, the object of the present invention is to provide a multi-channel covert polygraph method based on cardiac shock signals, which can make up for the single signal, intrusive acquisition signal and inability to conceal in the existing polygraph technology. Insufficient, while retaining the common signal characteristics of polygraph technology, such as cardiac shock signal and skin resistance signal and other physiological characteristics, aiming to obtain the different states of the subject truly and reliably without affecting the normal physiological and psychological reactions of the subject information under

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