目 录
摘 要 ...................................................................................................................................................I
ABSTRACT ...........................................................................................................................................II
第一章 绪论 .......................................................................................................................................... 1
§1.1 疲劳的概念 ......................................................................................................................... 1
§1.2 研究背景 ............................................................................................................................. 1
§1.3 疲劳检测方法概述 .............................................................................................................2
§1.4 本文所完成的工作 .............................................................................................................3
第二章 脉搏波机理和研究方法 ..........................................................................................................5
§2.1 脉搏波概述 ......................................................................................................................... 5
§2.1.1 脉搏波的定义 ..........................................................................................................5
§2.1.2 脉搏波信息 ..............................................................................................................5
§2.1.3 脉搏测量的意义 ......................................................................................................5
§2.2 脉搏波信号的形成机理及脉搏波形图特征 .................................................................... 6
§2.2.1 脉搏波形成机理 ......................................................................................................6
§2.2.2 脉搏波形图特征 ......................................................................................................6
§2.3 脉搏波信号分析方法概述 .................................................................................................7
§2.3.1 相关噪声检测在脉搏信号提取中的应用 ............................................................. 8
§2.3.2 小波变换在脉搏提取中的应用 ..............................................................................9
§2.3.3 基于 Hilbert-Huang 变换的脉搏信号分析 ............................................................ 9
§2.3.4 高斯函数叠加法的算法流程 ................................................................................10
§2.3.5 脉图 K值在脉搏波分析中的应用 .......................................................................11
第三章 采集系统硬件设计 ................................................................................................................13
§3.1 采集系统的分析 ...............................................................................................................13
§3.2 传感器的选取 ...................................................................................................................14
§3.2.1 压电式传感器的工作原理 ....................................................................................14
§3.2.2 压电传感器的等效电路 ........................................................................................16
§3.2.3 压电传感器的测量电路 ........................................................................................17
§3.3 电荷放大器电路的设计与实现 .......................................................................................20
§3.3.1 芯片介绍 ................................................................................................................20
§3.3.2 基本电路原理图 ....................................................................................................22
§3.4 信号调理电路 ...................................................................................................................24
§3.4.1 高通滤波 ................................................................................................................25
§3.4.2 低通滤波 ................................................................................................................25
§3.4.3 二阶 Butterworth 低通滤波 .................................................................................. 26
§3.4.4 带阻滤波器 ............................................................................................................27
第四章 MSP430 单片机及外围模块介绍 .........................................................................................29
§4.1 MSP430 系列单片机简介 ...................................................................................................29
§4.2 基本外围电路 .....................................................................................................................31
§4.2.1 电源电路 ................................................................................................................31