基于stm32的数据采集与无线传输的设计

[键入文字]I摘要随着数据监测、无线通信和嵌入式技术等应用领域的不断扩展，人们对数据采集系统[1]的采集精度、速度以及数据存储量都提出了更高的要求。针对当前数据采集系统的不足，提出了一个基于ARMCortex-M3处理器的STM32F103RBT6芯片的数据采集系统，实现多路模拟输入电压信号和电流信号的连续采集和顺序转换，ARM处理器高速数据采集系统设计，以满足系统高速、实时，数据存储量大的需求。此外，由于模拟信号的抗干扰能力差而不利于传输，因此通常利用数字信号进行传输。给出了由嵌入式STM32F103RBT6微处理器和射频收发芯片nRF905组成的无线传输模块设计。当其工作在868MHz频段时，数据传输速率可达1Mbit·s-1，采用高增益天线，使得传输距离可达800m以上，且表现出良好的稳定性。系统结构轻巧、维护方便。适用于工业信号数据采集和传输，防汛防旱等灾难预警中的数据检测，例如降雨量采集、水文站水位监测等。关键词:STM32F103RBT6nRF905数据采集无线传输[键入文字]IIABSTRACTWiththecontinuousexpansionofdatamonitoring,wirelesscommunicationandembeddedtechnologyapplications,peoplecollectprecisiondataacquisitionsystems,speedanddatastoragehaveputforwardhigherrequirements.ForlackofcurrentdatacollectionsystemisproposedbasedonARMCortex-M3processorSTM32F103RBT6chipdataacquisitionsystem,multi-channelanaloginputiscontinuouslycollectedandsequentialswitchingvoltageandcurrentsignalsof,ARMprocessorspeeddataacquisitionsystemdesignedtomeetthehigh-speed,real-time,datastoragecapacityofthesystemrequirements.Further,sincethedifferencebetweenthenoiseimmunityoftheanalogsignaltothedetrimentofthetransmission,itisoftenofadigitalsignaltobetransmitted.GivenbytheembeddedwirelesstransmissionmoduledesignSTM32F103RBT6microprocessorandRFtransceiverchipnRF905composition.Whenitsworkinthe868MHzband,thedatatransferrateupto1Mbit•s-1,usinghigh-gainantenna,sothatthetransmissiondistanceupto800mormore,andshowedgoodstability.Systemcompactstructure,easymaintenance.Fordatadetectionsignaldataacquisitionandtransmissionindustry,disasterssuchasfloodanddroughtearlywarning,suchasrainfallcollection,hydrologicstationmonitoring.Keywords:STM32F103RBT6NRF905WirelesstransmissionDatacollection[键入文字]III目录摘要..............................................................................................................................................IABSTRACT...................................................................................................................................II目录...........................................................................................................................................III1引言.........................................................................................................................................11.1本课题的研究目的及意义...............................................................................................11.2本课题研究状况...............................................................................................................11.3设计内容及研究方法.......................................................................................................22系统总体设计方案.....................................................................................................................32.1系统硬件设计思想...........................................................................................................32.2系统硬件方案比较...........................................................................................................32.2.1数据采集模块.........................................................................................................32.2.2无线模块的选择.....................................................................................................42.2.3终端显示模块.........................................................................................................43系统硬件设计.............................................................................................................................53.1硬件系统设计总体框架图...............................................................................................53.2数据采集模块的设计.......................................................................................................53.2.1主控芯片.................................................................................................................63.2.2A/D模数转换器......................................................................................................73.2.3模拟开关.................................................................................................................93.2.4电源模块...............................................................................................................113.3无线模块的介绍.............................................................................................................113.4终端显示模块.................................................................................................................143.4.1主控芯片的选择...................................................................................................144系统软件设计...........................................................................................................................204.1数据采集与无线传输软件总体设计..............................................................................204.2软件流程图.....................................................................................................................204.3几个重要的分程序.........................................................................................................215系统调试...............................