【正文】 y posture and send alarm messages. Telemunication module will alarm information. So this device may be widely applied to the elderly and children protection.Key words: fall detectors；acceleration sensor；signal transmission；signal feedback目 錄I目 錄第一章 緒 論 ............................................................................................................1 跌倒探測(cè)儀的意義 ............................................................................................1 本課題的研究理論方法 ....................................................................................2 本文的內(nèi)容 ........................................................................................................2第二章　 人體建模 ........................................................................................................4 人體跌倒檢測(cè)的基本特征 ................................................................................4 人體運(yùn)動(dòng)模型的建立 ........................................................................................4第三章　 三軸加速度傳感器 ........................................................................................6 熱對(duì)流式加速度傳感器 ....................................................................................6 引言 .............................................................................................................6 工作原理 .....................................................................................................6 優(yōu)點(diǎn) .............................................................................................................7 消費(fèi)電子產(chǎn)品的特點(diǎn) .................................................................................8 靜電懸浮式三軸加速度傳感器 ........................................................................9 引言 .............................................................................................................9 結(jié)構(gòu)設(shè)計(jì) .....................................................................................................9　 靜電懸浮原理 ...........................................................................................10 電容位移檢測(cè)原理 ...................................................................................10 加速度測(cè)量原理 .......................................................................................10 參數(shù)設(shè)計(jì) ...................................................................................................11 設(shè)計(jì)結(jié)果與討論 .......................................................................................11 誤差來(lái)源及改進(jìn)措施 ...............................................................................12 壓電式加速度傳感器 ......................................................................................13 壓電式加速度計(jì)的結(jié)構(gòu) ...........................................................................13 壓電式加速度計(jì)的靈敏度 .......................................................................14江 蘇 大 學(xué) 本 科 學(xué) 位 論 文II 壓電加速度計(jì)的前置放大器 .....................................................................14 壓電式速度傳感器 ...................................................................................15 壓阻式三軸加速度傳感器 ..............................................................................15 工作原理 ...................................................................................................15 MMA7260Q 三軸向高靈敏度加速度傳感器 ................................................16 引言 ...........................................................................................................16 典型應(yīng)用 ...................................................................................................17 實(shí)現(xiàn)最佳效果的開發(fā)工具 .......................................................................17 MMA7260Q 的特性 .................................................................................17 MMA7260Q 的優(yōu)點(diǎn) .................................................................................18第四章 信號(hào)傳輸 ......................................................................................................19 引言 ..................................................................................................................19 系統(tǒng)方案設(shè)計(jì) ..................................................................................................19 系統(tǒng)結(jié)構(gòu)設(shè)計(jì) ..................................................................................................19 硬件設(shè)計(jì) ..........................................................................................................20 加速度采集電路 .......................................................................................20 MCU 外圍電路 .........................................................................................20 液晶顯示 ...................................................................................................22 通信模塊 ...................................................................................................22 端口分配 ...................................................................................................23 事務(wù)處理及狀態(tài)機(jī) ...................................................................................24 系統(tǒng)設(shè)置 ...................................................................................................25 按鍵功能 ...................................................................................................25 計(jì)步器 .......................................................................................................26 跌倒檢測(cè) .................................................................................................27 報(bào)警處理 .................................................................................................27 通信控制 .................................................................................................28第五章 加速度傳感器的電子筆數(shù)據(jù)采集系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn) ...................................30 引言 ...................................................................................................................30目 錄III 系統(tǒng)總體框架圖 ............................