本科毕业设计题 目基于 51 单片机的频率计设计学生姓名程元国学 号125032119班 级防灾仪器系 ---专 业测控技术与仪器系 别 防灾仪器系指导老师马洪蕊职 称副教授年 月 日基于 51 单片机的频率计设计作 者 程元国指导老师 马洪蕊摘要 随着科学技术的进展，数字频率计越来越多的应用到了科学讨论中。无论是在高端的航天航空领域还是在普通实验室科研活动中，数字频率计已经成为不可或缺的重要科研工具。 频率计在实现高精度和高量成的频率测量的同时，也要实现对成本的控制，这对频率计设计者来说是一向巨大的挑战。本设计系统是以 STC89C52 单片机为核心的数字频率计。基本原理是 51 单片机通过外面所具有的电路采集信号上升沿，通过单片机的定时的器件实现对频率的计算，在 LCD1602 上实现对频率的实时显示。本设计系统实现了对方波，三角波，正弦波的频率测量，测频范围为 l Hz到 10MHz。关键词:51 单片机;LCD1602;数字频率计;74hc390Based on 51 single chip microcomputer frequency meter design Author ChengYuanguo Tutor MaHongruiAbstract With the development of science and technology, the digital fre meter is more and more applied T0 scientific research. Digital fre meter has become an indispensable and important research T0ol in the field of high - end space aviation and scientific research activities. fre meter in the realization of fre measurement with high precision and high A. at the same time, but also T0 achieve the cost control, the fre meter designers are always huge challenges. The design system is based on the STC89C52 micro controller as the core of the digital fre meter. The basic principle is the 51 micro controller through the outside of the circuit and the signal rising edge, through the timing of the device T0 achieve the fre of the calculation of the fre of the LCD1602 T0 achieve the real-time display. The design of the system T0 achieve a square wave, triangle wave, sine wave fre measurement, fre measurement range of l...
