基于单片机的数字气压计的设计与实现学生: 指导老师: 内容摘要: 数字气压计的重要组成部分是压敏元件。压敏元件能够将数字气压计需要测量的气压转化成为一种电流或者是一种电压信号。此时形成的电流或者电压信号具有容易传输、 容易检测的特点。之后, 经过后续电路处理这种电流或者是电压信号, 它就能够显示在数字气压计的屏幕上。这就是数字气压计的电流传输、 处理、 显示与读数过程。在数字气压计中, 气压传感器起着决定性的作用。 数字气压计的设计与实现是一个复杂而繁琐的过程。它的设计需要硬件与软件二者相结合, 再经过系统的仿真调试得以实现。气压传感器起着关键性、 决定性的作用。本设计中我们将采纳型号为MPX4105的传感器。经过此型号的传感器测出相对应的具有模拟性的电压值, 之后经过电压/频率( V/F) 变换手段将其电压值输入到单片机进行处理, 显示出相对应的气压值。本设计的总体目标是将大学三年多所学的专业知识运用到实践当中去。在这次设计中能够实现数字气压计系统的所有特性。关键词: 压敏元件 数字气压计 单片机 气压传感器The Design and Implementation of Digital Barometer Base on Single Chip MicrocomputerAbstract: Digital barometer is a device that makes full use of pressure sensitive components,which can make the tested pressure change into current or voltage signal easily. At the same time,pressure sensors is the core component for barometer.The ariticle introduces a excellent way that illustrated digital precision barometer can obtain the function of soft and hardware at the same time.The air pressure via MPX4105 which achieving the value of analong voltage,and the signal is converted by V/F converter,then coped with SCM. Finally,the signal can be displayed on LED synchronously.As we can see that this kind of system is reliable,stable security and economy.Keywords:Pressure-sensing element Digital barometer single chip microcomputer Gs pressure transducer目 录前言.........................................................11 系统总体设计.............................................
