目 录
引 言 ..................................................................................................................................1
第一章 数字气压计系统论证............................................................................................2
1.1 数字气压计设计系统 ....................................................................................................2
1.2 设计思路分析 ................................................................................................................2
1.2.1 设计方案一 ................................................................................................................2
1.2.2 设计方案二 ................................................................................................................2
1.2.3 设计单片机控制的数字气压计系统时的注意事项 ................................................3
第二章 系统总体构造的设计............................................................................................4
2.1 系统总体结构 ...............................................................................................................4
2.2 A/D 转换模块 .............................................................................................................4
2.3 MPX4115 传感器模块 ..................................................................................................6
2.4 数据处理模块 ................................................................................................................7
2.4.1 数据处理模块电路的原理图 .....................................................................................7
2.5 显示模块 ......................................................................................................................11
2.5.1 LCD1602 显示器的介绍 ..........................................................................................12
2.6 电源电路模块 ..............................................................................................................13
2.7 本设计总体电路介绍 .................................................................................................14
2.7.1 对于数据的转换计算 ..............................................................................................15
第三章 程序的设计及系统调试与仿真..........................................................................16
3.1 由频率算出电压值 .....................................................................................................16
3.2 程序流程图 ..................................................................................................................16
3.3 关于 keil4 和 proteus 的介绍 ......................................................................................17
3.4 程序仿真图如下 .........................................................................................................18
3.5 电路仿真如图所示 .....................................................................................................20
总结 ....................................................................................................................................21
参考文献 ............................................................................................................................22
谢 辞 ................................................................................................................................24
