基于AT89C51单片机的简易频率计的设计

Algorithms of Signal Classification Based on Spectrum Analysis

为了解决市场上各种多功能、高精度数字频率计高价格的问题,本文通过综合分析实际工作的要求,选择市场上低价格的常用元件,由单片机产生闸门时间与时钟等基准信号以减少外围电路,从而提出了一种基于单片机(AT89C51)为主控制核心、LCD1602为显示界面的频率计设计方案。本方案可满足简易频率计体积小、成本低、精度高、可测频带宽的市场需求。

In order to meet the great necessity of multi-function, high-precision digital frequency meter with a lower price, we choose the common cheap components, and use microcontroller to produce the basic clock signal to minimize the peripheral circuit. A design of frequency meter based on microcontroller （AT89C51） and LCD1602 is proposed, which has the properties of small size, low cost, high precision and wide frequency bandwidth.