1、 毕业设计(论文)正文 题 目 基于 MPX4105 数字气压计的设计 专 业 机械设计制造及其自动化 班 级 机械工程系机制 0311 班 姓 名 学 号 指导教师 职 称 xx 讲师 2007 年 6 月 9 日 摘摘 要要 本文主要介绍了基于气压传感器 MPX4105 的精密数字气压计系统的硬件组成、 软件设计 及其工作原理。 该系统通过气压传感器 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，再通过单片机对此脉冲序列的计数等处理后获 得实际的气压值，最后通过数码管显示电路显示。单片机是本系统的核心器件，它对本设计 中的信号采集、控
2、制和数据处理起着重要的作用。该方法制成的数字气压计携带方便，操作 简单，精确度高，完全符合设计要求。 关键词：关键词：气压计；气压传感器；VF 转换器； 单片机 Abstract This article mainly introduced based on one kind of pneumatic transmitter MPX4105 precise numeral air gage system hardware composition, the software design and its the principle of work. This system obtains the
3、 simulation voltage value through pneumatic transmitter MPX4105 which corresponds with the atmospheric pressure, and (V/F) transforms the module after the voltage/frequency to transform into the digital pulse, in counts regarding this through the monolithic integrated circuit pulse sequence and so o
4、n processing, thus obtains the actual barometric pressure value finally through the digital tube display circuit to demonstrate gives the user. The monolithic integrated circuit still is this system core component, it is very important for function in this design signal gathering, control and data processing. This method makes the digital air gage carries conveniently, operation simple, the precision is high, completely conforms to the design requirement. Key words：Air gage Pneumatic
