基于STM32的高精度车载气压高度表设计
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摘要
针对车载气压高度表对跨地域、长时间运行的高精度以及系统小型化、界面友好化等要求,设计了基于STM32硬件平台的车载气压高度表系统。系统中采用高精度硅压阻式压力传感器,皮托管及相关管路组成气路系统实现大气压静压的采集,并通过嵌入式实时操作系统μC/OS—II和图形用户界面μC/GUI实现基于多任务的界面显示。实验结果表明:经实时校正后的车载气压高度表在长时间运行时测量精度优于1.2m,具有较高的测量精度,能很好地满足气压高度表车载应用的高精度高度定位要求。
Aiming at requirements of high precision during cross region and long time running,system miniaturization,and user interface friendly,a vehicle-oriented barometric altimeter system based on STM32 hardware platform is designed.In this system,high precision silicon piezoresistive pressure sensors,pitot tube and related pipeline is used to make up of gas path system for air static pressure sampling,and through embedded real time operating system(RTOS) μC /OS-II and graphical user interface(GUI) μC /GUI,realize displaying of user interface based on multitask.Experimental results show that after being real time calibrated,vehicle-oriented barometric altimeter for long time running has high measurement precision prior to 1.2 m which well meets the height positioning precision requirement for barometric altimeter used by vehicles.
Aiming at requirements of high precision during cross region and long time running,system miniaturization,and user interface friendly,a vehicle-oriented barometric altimeter system based on STM32 hardware platform is designed.In this system,high precision silicon piezoresistive pressure sensors,pitot tube and related pipeline is used to make up of gas path system for air static pressure sampling,and through embedded real time operating system(RTOS) μC /OS-II and graphical user interface(GUI) μC /GUI,realize displaying of user interface based on multitask.Experimental results show that after being real time calibrated,vehicle-oriented barometric altimeter for long time running has high measurement precision prior to 1.2 m which well meets the height positioning precision requirement for barometric altimeter used by vehicles.
引文
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[11]严龙军,熊文卓.μC/GUI T6963C LCD控制器驱动移植及矢量汉字显示[J].信息化纵横,2009(18):39-42.
[2]候永利,万颜辉.自主式车载组合导航系统误差修正技术研究[J].弹箭与制导学报,2006,26(1):179-182.
[3]姚怡,黄智刚,李锐.便携式气压高度计研制及误差修正技术研究[J].遥测遥控,2009,30(6):48-51.
[4]吴晓男,唐大全,吴庆九.气压式高度表的测量误差分析及修正方法[J].仪表技术,2010(12):26-28.
[5]Guo Qi,Zhou Zhaoying,Xiong Wei,et al.Design of a barometric altimeter based on a micro pressure sensor[J].Nano Technology and Precision Engineering,2012,10(4):337-341.
[6]樊尚春,吕俊芳,张庆荣,等.航空测试系统[M].北京:北京航空航天大学出版社.2005:236-244.
[7]张丽荣,马利华,王晓岚.CAPS气压测高的仿真分析[J].微计算机信息,2011,27(3):185-186.
[8]Zhou Qiang,Liu Yabin.Novel barometric altimeter system for vehicular testing of SINS[C]∥The Ninth International Conference on Electronic Measurement&Instruments,2009:491-493.
[9]邓中亮,何双亮.基于ARM的嵌入式操作系统μC/OS—II的移植研究[J].计算机技术与发展,2007,17(10):4-6.
[10]王兰英.基于STM32嵌入式系统的μCGUI移植与实现[J].四川理工学院学报:自然科学版,2012,25(1):56-58.
[11]严龙军,熊文卓.μC/GUI T6963C LCD控制器驱动移植及矢量汉字显示[J].信息化纵横,2009(18):39-42.