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题目：基于单片机的智能压力检测系统的设计内蒙古科技大学毕业设计说明书（毕业论文）I基于单片机的智能压力检测系统的设计摘要压力是工业生产过程中的重要参数之一。压力的检测或控制是保证生产和设备安全运行必不可少的条件。实现智能化压力检测系统对工业过程的控制具有非常重要的意义。本设计主要通过单片机及专用芯片对传感器所测得的模拟信号进行处理,使其完成智能化功能。介绍了智能压力传感器外围电路的硬件设计,并根据硬件进行了软件编程。本次设计是基于STC89C52单片机的测量与显示。是通过压力传感器将压力转换成电信号，再经过运算放大器进行信号放大，送至24位A／D转换器，然后将模拟信号转换成单片机可以识别的数字信号，再经单片机转换成LED显示器可以识别的信息，最后显示输出。而在显示的过程中通过键盘，向计算机系统输入各种数据和命令，让单片机系统处于预定的功能状态，显示需要的值。本设计的最终结果是，将软件下载到硬件上调试出来了需要显示的数据，当输入的模拟信号发生变化的时候，通过A/D转换后，LED将显示不同的数值。关键词:压力；STC89C52单片机；压力传感器；A/D转换器；LED显示；内蒙古科技大学毕业设计说明书（毕业论文）IIDesignofpressuredetectingsystembasedonsingle-chipAbstractPressureisoneoftheimportantparametersintheprocessofindustrialproduction.Pressuredetectionorcontrolisanessentialconditiontoensureproductionandtheequipmenttosafelyoperating,whichisofgreatsignificance.Thesingle-chipisinfiltratingintoallfieldsofourlives,soitisverydifficulttofindtheareainwhichthereisnotracesofsingle-chipmicrocomputer.Inthisgraduationdesign,primarilythroughbyusingsingle-chipanddedicatedchip,handlingofanalogsignalmeasuredbythesensortocompleteintelligentfunction.Thisdesignillustratesexternalhardwarecircuitdesignofintelligentpressuresensor,andconductsoftwaredevelopmenttothehardware.ThedesignisbasedonmeasurementanddisplayofSTC89C52single-chip.Thisisthepressuresensorswillconvertthepressureintoelectricalsignals.Afterusingoperationalamplifier,thesignalisamplified,andtransferredtothe8-bitA/Dconverter.Thentheanalogsignalisconvertedintodigitalsignalswhichcanbeidentifiedbysingle-chipandthenconvertedbysingle-chipintotheinformationwhichcanbedisplayedonLEDmonitor,andfinallydisplayoutput.Inthecourseofshow,throughthekeyboardtoinputallkindsofdataandcommandsintothecomputer,thesingle-chipwilllocateinapredeterminedfunctionsteptodisplayrequiredvalues.Theendresultofthisdesignisthatbydownloadingsoftwaretothehardware,itwillgetthedatawhichisrequiredtodisplaybydebugging.Whentheinputanalogsignalschange,theLEDmonitorwilldisplaydifferentvaluesthroughtheA/Dconverting.Keywords:pressure;STC89C52single-chip;pressuresensor;A/Dconverter;LEDmonitor;内蒙古科技大学毕业设计说明书（毕业论文）III目录摘要.............................................................................................................................................IAbstract………………………………………………………………………………………..II第一章绪论…………………………………………………………………………………...11.1研究背景......................................................................................................................11.2基于单片机的智能压力检测的原理..........................................................................21.2.1压力的概念........................................................................................................21.2.2测量压力的意义................................................................................................3第二章基于单片机的智能压力检测系统的硬件设计…………………………………….42.1压力传感器..................................................................................................................42.1.1压力传感器的选择............................................................................................42.1.2金属电阻应变片的工作原理.............................................................................42.1.3电阻应变片的基本结构..................................................................................62.1.4电阻应变片的测量电路....................................................................................62.2信号放大电路..............................................................................................................82.1.2放大器的选择....................................................................................................82.2.4三运放大电路....................................................................................................92.3A/D转换器.................................................................................................................102.3.1A/D转换模块器件选择...................................................................................102.3.2A/D转换器的简介...........................................................................................102.4单片机........................................................................................................................112.4.1STC89C52单片机简介....................................................................................122.4.2主要特性….......................................................................................................122.4.3管脚说明..........................................................................................................132.4.5芯片擦除..........................................................................................................142.5单片机于键盘的接口技术.......................................................................................152.5.1键盘功能及结构概述......................................................................................152.5.2键盘抖动及去除..............................................................................................152.5.3单片机与键盘的连接......................................................................................16内蒙古科技大学毕业设计说明书（毕业论文）IV2.6LED显示接口.....................