文档介绍：河海大学毕业论文(设计) 毕业论文学生姓名学专题院业目学号指导教师 2012 年 5 月 0 河海大学毕业论文(设计) 摘要:本设计就介绍了一种基于气压传感器 MPX4105 的精密数字气压计系统的实时显示设备。它通过气压传感器 MPX4105 获得与大气压相对应的模拟电压值,并经过电压/频率(V/F)转换模块转换为数字脉冲,通过单片机接收该脉冲信号,得到单位时间内获得的脉冲数,依据电压与频率的线性关系式计算出所对应的实际气压值,最后在单片机的控制下由液晶显示电路显示出实际气压值。阐述了系统的软件设计,以 C 语言为开发工具,进行了详细设计和编码。总体目标是实现系统的可靠性、稳定性、安全性和经济性。关键词:气压传感器,电压/频率转换,单片机,液晶显示 1 河海大学毕业论文(设计) Abstract: This design is introducedwhich is based on pressure sensor MPX4105 precision digital barometer ofreal-time display device. System It through the air pressure sensorMPX4105 was obtained with the atmospheric pressure correspondingsimulation voltage values, and through voltage/frequency (V/F)conversion module converted to digital pulse, through the microcontrollerreceives the pulse signal, receive an unit time get, according to thenumber of pulses of linear equation of voltage and frequency calculatedthe actual air pressure value corresponding last, under the control ofthe processor by liquid crystal display circuit shows real pressure the system software design, development tools is C language, a detaileddesign and coding. The overall objective is to achieve system reliability,stability, security and economy. Keywords: mcu,pressure sensor,v/ftransferor,lcd 2 淮阴师范学院毕业论文(设计) 目录 1 绪论....................................................................................................................... 3 课题背景.......................................................................................................... 3 技术概况及发展趋势....................................................................................... 3 数字气压计系统设计的意义........................................................................... 5 2 系统总体设计..................................................................................................... 5 设计思路分析................................................................................................... 5 系统总体结构.......................................................