一种智能测谎系统的算法实现

The Realization of an Intelligent Polygraph System

基于测谎技术的广泛应用以及测谎精度的要求,在既定的下位机及硬件系统的基础上,提出了该测谎系统的算法设计原则。系统选取呼吸波、脉搏信号和皮肤电阻三组参量为测量数据,建立基于MATLAB数据处理软件的算法。算法可以实现对三组参量特征值的滤波和提取;并将数学建模常用的判别分析法应用于算法设计中,实现对说谎情况的分类并计算说谎的概率,保证在较高精度下判断被测者的说谎情况。最后设置模拟实验进行验证,实验结果表明此算法可以较准确地判定说谎的概率。

Based on the widespread application of polygraph and the accuracy requirement of the lie detector,this paper puts forward the algorithm design principles of the polygraph system on the basis of the established components and processing chip. The system selects respiratory wave,pulse signal and the skin resistance for measurement,to establish an algorithm based on MATLAB data processing software. Algorithm can be implemented on three sets of parameters filtering and extracting characteristic value. To ensure the accuracy of the test to determine the lying,discriminant analysis method for mathematical modeling algorithms is applied to the design to achieve the classification of lying and calculate the probability of lying. Finally,the paper will verify the feasibility of the algorithm through the simulation.