目 录
前言...............................................................................................................................................................................1
1 测频系统的工作流程...............................................................................................................................................1
1.1 测频系统的软件设计.........................................................................................................................................1
1.2 脉冲频率测量流程图.........................................................................................................................................1
初始化流程图......................................................................................................................................................2
2 测频系统的硬件结构...............................................................................................................................................3
2.1 单片机的介绍.....................................................................................................................................................3
单片机软件特性..................................................................................................................................................3
单片机硬件特性..................................................................................................................................................4
2.2 脉冲频率方法的分类.........................................................................................................................................4
2.3 系统硬件原理图.................................................................................................................................................4
3 频率测量模块的方法分类和误差分析...................................................................................................................5
3.1 频率测量的方法.................................................................................................................................................5
3.2 测频法的误差分析.............................................................................................................................................5
测频法计算公式..................................................................................................................................................5
测频法测量围......................................................................................................................................................5
测频法小结..........................................................................................................................................................6
3.3 测周法的误差分析.............................................................................................................................................6
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