1 引言.........................................................................................................................2
2 设计要求.................................................................................................................2
3 方案论证.................................................................................................................2
3.1 测量方法的选型...........................................................................................3
3.2 核心处理模块的方案...................................................................................3
3.2.1 控制芯片的选型.................................................................................3
3.2.2 采用 51 单片机测量的方案论证.......................................................4
3.2.3 软件系统设计方案.............................................................................4
3.3 电机转速测量模块的方案...........................................................................5
3.4 电机转速控制方案.......................................................................................5
3.5 显示模块方案...............................................................................................6
4 系统设计.................................................................................................................6
4.1 单片机模块..................................................................................................6
4.1.1 51 单片机介绍.............................................................................6
4.1.2 系统的复位电路..........................................................................8
4.1.3 系统时钟电路设计......................................................................8
4.1.4 IO 口管脚分配............................................................................9
4.2 电机转速控制...............................................................................................9
4.3 显示模块......................................................................................................10
4.3.1 LCD1602 介绍和指令.......................................................................10
4.3.2LCD1602 的工作时序 ......................................................................13
4.4 霍尔传感器模块..........................................................................................13
5.软件系统设计........................................................................................................14
5.2 程序模块......................................................................................................15
5.2.1 数据采集处理部分和 PWM 输出部分............................................15
5.2.2 LCD1602 显示部分...........................................................................16
参考文献...................................................................................................................17
原理图.......................................................................................................................18