基于无线通信轮胎压力监测系统设计

黑龙江工程学院本科毕业生毕业设计Ⅰ本科学生毕业设计基于无线通信轮胎压力监测系统设计院系名称：专业班级：学生姓名：指导教师：李静职称：讲师黑龙江工程学院二○一二年六月黑龙江工程学院本科毕业生毕业设计ⅠTheGraduationDesignforBachelor'sDesignOfTirePressureMonitoringSystemBasedonWirelessCommunicationCandidate：Specialty：Measurement-ControlTechnologyandInstrumentationClass：Supervisor：Lecturer.LiJingHeilongjiangInstituteofTechnology2012-06·Harbin黑龙江工程学院本科毕业生毕业设计Ⅰ摘要轮胎压力监测系统(TirePressureMonitoringSystem，TPMS)是车辆安全行驶的重要保障之一，在汽车电子技术高速发展和对汽车安全性能要求更高的前提下，对TPMS系统的研究和设计具有广泛的应用前景，并能带来良好的经济效益和社会效益。本设计深入分析了TPMS技术的研究现状和发展趋势，并对比了间接式TPMS和直接有源式TPMS的优缺点。选择直接有源式TPMS作为本设计的研究目标，利用嵌入轮胎中的温度传感器和压力传感器检测轮胎的压力、温度以及供电电池的电压等参数，然后经过模数转换器的转换之后再通过无线射频方式发射到安装在驾驶室的监视器上。监视器实时显示各轮胎参数，在出现异常时及时发出相关告警信息。设计针对直接有源式TPMS技术实现的主要难点问题，包括系统预警的准确性和可靠性、检测传感器模块的低功耗性能等，开展了以下工作：1)对RF发射部分进行详细设计，包括发射天线的匹配网络、无线通信协议以及RF发射管理机制等；2)提出改进的基于多传感器融合技术的预警算法，有效提高系统预警的正确性，避免告警信号的漏报和误报；3）分析TPMS应用的电磁环境，在电磁兼容性设计层面上，阐述了系统的软硬件设计方案；4)在选择极低功耗检测传感器等器件的基础上，选择更适合应用环境的锂亚供电电池，并采取良好的电源管理机制；研究表明，所设计的直接有源式TPMS系统有效地提高了检测精度和预警的准确率。关键词：轮胎压力监测系统；无线通信；温度传感器；压力传感器；预警黑龙江工程学院本科毕业生毕业设计ⅡAbstractTPMSisoneofthemostimportantsafeguardsforvehicletosafelydrive．WiththehighspeeddevelopmentoftheAutoElectronicTechnologyandpeople’smoredemandsforsafety，itwouldbeofwidelyapplicationforegroundtoresearchanddesigntheTPMS，andmeanwhile，itwouldalsobringmoresocialbenefitsandeconomicalbenefits．ThepaperhavedeeplyanalysedthedevelopmentstatusanddirectionofTPMSandcomparedthedifferencebetweenIndirectTPMSandDirectTPMS．ThepaperchooseDirectTPMSasresearchobject，DirectTPMSusesthesensorstomeasurethepressureandtemperatureoftheTiresandtransmitsthemtothemonitorwhichisinstalledinthedrivingplatformbyradiofrequencymodulation．Themonitordisplaysallkindsofpreferencesofthetiresintimeand，whenthepreferencesisabnormal，thealarmswillworksautomaticallyanddisplayrelatedinformation．Thesystem’salarmexactly，reliabilityandpromotingthebatterylifearethetechnicaldifficultiesorthekeypointforDirectTPMS．Regardingthesepoints，severalaspectsarestudied：(1)StudyingandDesigningtheRFTransmitdetailedly，includingtheMatchingNetworkforAntenna，thewirelesscommunicationprotocolandthemanagementofRFtransmission．(2)Afterinsuringtheaccurateprobabilityofwirelesstransmission，thepaperresearchesandadvancesthearithmeticbasedonSensorFusioninordertoavoidtheTPMSgivingwrongalarm．(3)AnalysetheapplicationelectromagnetismenvironmentofTPMSanddesignthehardwareandsoftwareconcretelybyconsideringtheperformanceofEMC．(4)BesideschoosingthelowestpowerconsumptionIC，indesign，choosestheLi／SOCl2batteryasthepowersupplyandusesamoreeffectivemanagemethodtoreducethesystem’spowerconsumption．Bytest，aftertakingthesemethodslistedonthefront，caneffectivelyimproveprecisionandveracityofthesystem，andatlast，thedesigncarriedoutthe黑龙江工程学院本科毕业生毕业设计Ⅲanticipativetarget．Keywords：TPMS；WirelessCommunications；TemperatureSensor；PressureSensor；Warning黑龙江工程学院本科毕业生毕业设计目录摘要............................................................................................................................ⅠAbstract......................................................................................................................Ⅱ第1章引言............................................................................................................11.1课题的背景..................................................................................................11.2课题研究的目的和意义..............................................................................21.2.1课题研究的目的................................................................................21.2.2课题研究的意义................................................................................31.3课题研究现状..............................................................................................41.3.1TPMS国外研究现状.......................................................................41.3.2TPMS国内研究现状.......................................................................41.3.3TPMS发展趋势...............................................................................61.4本设计研究的内容......................................................................................6第2章方案论证..................................................................................................82.1系统设计要求................................................................................................82.1.1系统工作环境介绍............................................................................82.1.2系统实现的功能介绍........................................................................82.1.3系统工作原理框图............................................................................82.2系统方案设计................................................................................................92.2.1TPMS系统的间接式..........................................................................92.2.2TPMS系统的直接式.....................................................................102.2.3TPMS系统直接式与间接式比较....................................................102.3本章小结......................................................................................................10第3章系统硬件设计.........................