基于51单片机的老人防摔GPS定位报警摘要本产品设计了一种基于51单片机，利用ADXL345加速度传感器的跌倒实时检测系统，来实现来人摔倒后的报警。用以完成老人跌倒后可以被及时发现并救助；它运用基于ＳＶＭ阈值法的三次判别算法；精准判断老人是否摔倒。设计还使用了ＧＰＳ卫星定位模块；对老人摔倒后进行准确定位。大量实践数据表明设计产品对大多数情况都能正确判断，误报率较低，可有效的区分日常生活行为和跌倒行为，对老人摔倒检查正确率达到９0％，稳定性，识别率很高。关键词：加速度传感器；阈值法；跌倒检测1AbstractThedesignofthisproductisbasedon51single-chipcomputer,usingADXL345accelerometerreal-timefalldetectionsystem,toachievethealarmafterpeoplefall.Itcanbefoundandrescuedintimeaftertheelderlyfall.Itusesthethree-timediscriminantalgorithmbasedonSVMthresholdmethodtoaccuratelyjudgewhethertheelderlyfallornot.GPSsatellitepositioningmoduleisalsousedinthedesign,whichcanaccuratelylocatetheelderlyafterfallingdown.Alargenumberofpracticaldatashowthatthedesignproductcancorrectlyjudgemostcases,andtherateoffalsealarmislow.Itcaneffectivelydistinguishdailylifebehaviorandfallbehavior.Thecorrectrateoffalldetectionfortheelderlyis90%,stabilityandrecognitionrateishigh.Keywords:accelerationsensor;thresholdmethod;falldetection2摘要........................................................................................................................21概述.....................................................................................................................51.1研究背景及意义......................................................................................51.2研究现状..................................................................................................51.3应用前景..................................................................................................52线路设计.............................................................................................................62.1设计思路..................................................................................................62.2模块分析..................................................................................................62.2.1GSM模块：...............................................................................62.2.2GPS模块：................................................................................72.2.3ADXL345模块：.....................................................................72.2.4单片机STC12C5A60S2的功能及最小系统的电路设计...........83硬件简述：.......................................................................................................113.1GPS模块VK2828U7G5LF部分...........................................................113.2ADXL345简要介绍...........................................................................183.3GSM模块简介......................................................................................204软件设计...........................................................................................................224.1keil应用.................................................................................................224.2AltiumDesigner应用.............................................................................224.3程序流程................................................................................................235.系统分析与调试......................................
