汽车制动试验台数据采集、处理系统研制

I摘要本文主要研究内容是汽车检测线制动工位测控系统的研制。GB7258—2007《机动车运行安全技术条件》中对汽车制动系统提出了主要技术条件,规定了台式检验制动性能的检测项目及相关标准。根据要求设计了总体方案，根据检测实际环境和技术要求具体设计了系统硬件和软件。首先，在确立了对汽车制动性能参量检测及控制的总体方案后，根据各个参量的特点设计了硬件检测电路。第二部分对软、硬件的可靠性设计、抗干扰措施等方面进行了研究。第三部分研究了本系统所采用的数据处理方法。包括FIR数字滤波算法。最后一部分对制动力测控系统进行了系统调试和性能试验，用前面提到的数据处理方法处理实验数据结果达到预期要求。关键词：汽车制动性测控检测系统抗干扰数字滤波FIRABSTRACTThisthesisdesignsautomobilebrakingperformanceinspectingandcontrolsystem.Someprimarytechnicalqualificationofautomobilebrakinghasbeenbroughtforwardinautomobilesafetytechnicalcondition.inspectingitemandcorrelatecriterionoftableinspectionbrakingperformancehasbeenprescriptedinit.Thehardwareandsoftwarearedesignedaccordingtopracticalneed.Inordertorestrainthenoise,thedesignofhardwareanti-interferenceanddigitalfilterisnecessary.Firstly,establishingtheblueprintofautobrakingperformanceinspectingandcontrolsystemthehardwarehasbeendesignedaccordingtothecharacteristicoftheparameter.Thesecondpartisthesoftwareandhardwarereliabilityandanti-jamminghasbeenresearched.Thethirdpartisaboutdataprocessingmethodincludingdigitalfilteringarithmeticanddatasynthesizingtechnical,suchasFIRdigitalfiltering.Inthelastpart,wedidsomesystemdebugandperformancetesttobrakinginspectingsystem.Accordingtothedatagainedbyusingthetechnicalwesaidjustnow.KeyWords：automobilebrakingperformanceinspectingsystemdigitalfilteringFiniteImpulseResponseI目录第一章绪论...........................................................................................................11.1本课题研究的目的及意义..................................................................................11.2本课题研究的主要内容......................................................................................1第二章制动试验台检测系统的设计.......................................................................22.1检测系统结构、原理及方案..............................................................................22.1.1制动工作试验台的工作原理...........................................................................22.1.2汽车制动性能检测相关标准........................................................................32.2设计方案.............................................................................................................32.3输入模块的设计..................................................................................................42.3.1力传感器信号处理电路................................................................................42.3.2速度传感器信号处理电路............................................................................72.4输出模块设计...................................................................................................112.5系统软件设计....................................................................................................11第三章系统抗干扰设计...........................................................................................143.1干扰的形成........................................................................................................143.1.1干扰源..........................................................................................................143.1.2耦合方式......................................................................................................143.2硬件抗干扰措施................................................................................................143.2.1供电系统的抗干扰措施..............................................................................143.2.2接地系统的抗干扰措施..............................................................................153.2.3针对电磁场耦合及辐射干扰而采取的措施..............................................153.2.4接口电路的抗干扰措施...........................................................................153.3用软件消除干扰的方法....................................................................................163.3.1软件抗干扰的提出......................................................................................163.3.2软件抗干扰的特点......................................................................................163.3.3设计合适的数字滤波程序..........................................................................163.3.4提高系统的容错能力.................................................................................163.4总结....................................................................................................................17第四章数字处理方法研究.....................................................................................184.1曲线拟合............................................................................................................184.1.1拟合曲线的优化算法..................................................................................194.1.2拟合曲线的优化算法..................................................................................19II4.1.3AB段拟合函数的构造................................................................................204.14BC段拟合函数的构造.................................................................................204.15优化后制动力曲线.......................................................................................214.2FIR数字滤波器的设计.....................................................................................214.2.1FIR结构简介........