本文選題：心電信號(hào) + MSP430��； 參考：《燕山大學(xué)》2014年碩士論文

【摘要】：慢性心理壓力對(duì)人體的健康產(chǎn)生威脅，構(gòu)建有效的心理壓力評(píng)估系統(tǒng)可以幫助識(shí)別心理壓力狀態(tài)，進(jìn)而實(shí)現(xiàn)適當(dāng)干預(yù)。心電信號(hào)蘊(yùn)含豐富的情感信息，本文設(shè)計(jì)了一個(gè)以心電信號(hào)為核心的心理壓力評(píng)估系統(tǒng)，實(shí)現(xiàn)了心電信號(hào)采集的12導(dǎo)聯(lián)硬件電路和基于多生理參數(shù)決策層融合實(shí)現(xiàn)心理壓力識(shí)別的軟件分析系統(tǒng)。 首先，，本文基于心電信號(hào)特點(diǎn)設(shè)計(jì)了一種以采集處理為主要功能的12導(dǎo)聯(lián)心電信號(hào)采集電路，包括信號(hào)放大、信號(hào)濾波、模/數(shù)轉(zhuǎn)換、串口通信等功能模塊。該電路可以采集人體胸部表面和四肢的心電信號(hào)，然后對(duì)心電信號(hào)進(jìn)行兩級(jí)放大、濾波以及基于MSP430芯片的模/數(shù)轉(zhuǎn)換，最后轉(zhuǎn)變?yōu)榇袛?shù)據(jù)經(jīng)過串口傳送給計(jì)算機(jī)供后續(xù)算法處理。 然后，根據(jù)心理壓力誘發(fā)原理設(shè)計(jì)壓力誘發(fā)程序?qū)κ茉囌哌M(jìn)行刺激，利用本文設(shè)計(jì)的心電信號(hào)采集電路采集心電信號(hào)，通過美國的多導(dǎo)生理記錄儀MP150采集表面肌電信號(hào)和手指脈搏波信號(hào)。采集了9名受試者共36組心電信號(hào)，18組表面肌電信號(hào)，18組手指脈搏波信號(hào)作為心理壓力狀態(tài)評(píng)估的數(shù)據(jù)源，其中的18組心電信號(hào)9組表面肌電信號(hào)，9組手指脈搏波信號(hào)為靜息狀態(tài)下的生理信號(hào)，作為識(shí)別心理壓力的對(duì)照組。 最后，基于D-S證據(jù)理論構(gòu)建多生理參數(shù)決策層融合方法識(shí)別心理壓力。首先對(duì)采集到的數(shù)據(jù)進(jìn)行初步處理，提取特征以及初級(jí)壓力識(shí)別，然后基于D-S證據(jù)理論對(duì)心電信號(hào)、表面肌電信號(hào)和手指脈搏波信號(hào)做決策層融合評(píng)估心理壓力狀態(tài)。三種生理參數(shù)的數(shù)據(jù)經(jīng)過融合后的心理壓力最高信任度達(dá)0.9987，比融合前單一參數(shù)識(shí)別心理壓力的最高信任度0.8667高出了0.1320。經(jīng)過多生理參數(shù)融合以后的實(shí)驗(yàn)結(jié)果表明，融合后的評(píng)估結(jié)果比單一信號(hào)的評(píng)估結(jié)果提高了，既驗(yàn)證了心電信號(hào)采集和分析系統(tǒng)的有效性也證明了基于多生理參數(shù)的心理壓力狀態(tài)評(píng)估融合模型的優(yōu)越性。
[Abstract]:The health threat of chronic psychological stress on the human body, the construction of psychological pressure of effective evaluation system can help identify the psychological pressure, so as to realize the proper intervention. Rich emotional information contained in the ECG signal, this paper designs a ECG signal as the core of the psychological stress evaluation system, realized the hardware circuit of 12 lead ECG signal acquisition and based on multi parameter decision fusion recognition software to realize the psychological pressure analysis system.
First of all, the ECG signal based on the characteristics of a design of a data acquisition and processing is the main function of the 12 lead ECG signal acquisition circuit, including signal amplification, signal filtering, analog / digital conversion, serial communication function module. The circuit can ECG signal acquisition of human chest surface and limbs, and then the ECG signal was two amplification, filtering and MSP430 chip analog to digital conversion based on the last into serial data transmitted by serial port to computer for further processing algorithm.
Then, according to the design principle of pressure induced by psychological stress induced by the program of subjects were stimulated by ECG signal acquisition circuit of ECG signal acquisition is designed in this paper, polygraph MP150 acquisition of surface EMG signal and finger pulse wave signal acquisition by the American. 9 subjects were divided into 36 groups of 18 groups of surface ECG signal the EMG signal, 18 groups of finger pulse wave signal as a psychological pressure to evaluate the state of the data source, 9 groups of surface EMG signal of ECG signals in 18 groups, 9 groups of finger pulse wave signal for physiological signal in resting state, as the control group to identify psychological pressure.
Finally, the construction of multiple physiological parameters decision fusion method to identify the psychological pressure based on D-S evidence theory. Firstly, the data was collected and preliminary processing, feature extraction and recognition based on the primary pressure, then D-S evidence theory for ECG signal, surface EMG signal and finger pulse wave signal for decision fusion to assess the psychological pressure. Three the physiological parameters data after fusion of psychological pressure the highest trust degree reached 0.9987, more than the highest trust before fusion single parameter identification of psychological pressure of 0.8667 higher than 0.1320. after fusion of multiple physiological parameters. The experimental results show that the evaluation of fusion results than the single assessment results to improve the signal, which verifies the validity of the signal acquisition and analysis system of ECG also proved the superiority evaluation fusion model of psychological stress state of multiple physiological parameters based on.

【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN911.7

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