目 录摘要..................................................................1Abstract..............................................................11 绪论...............................................................11.1 设计目的和意义................................................11.2 设计任务......................................................21.3 讨论内容及可行性分析..........................................21.3.1 讨论内容................................................21.3.2 可行性分析..............................................32 系统设计理论基础...................................................32.1 转速测量方法..................................................32.1.1 测频法（M 法）...........................................32.2 电机转速信号采集方案..........................................42.2.1 霍尔开关测量方案........................................42.2.2 传感器测转速方案确定....................................52.3 直流电机调速方法..............................................52.3.1 PWM 调速设计.............................................52.4 直流电机驱动方案选择与论证....................................72.4.1 L298 引脚及功能说明......................................73 系统方案设计与论证.................................................83.1 方案一........................................................83.2 方案二........................................................83.3 方案选择......................................................84 系统硬件设计.......................................................94.1 系统硬件框图..................................................94.2 转速信号采集电路..............................................94.3 单片机模块...................................................104.4 电机驱动与控制电路...........................................124.5 显示电路模块.................................................134.5.1 液晶显示器 LCD1602 芯片引脚图及说明.....................134.5.2 液晶显示模块电路....
