基于Arduino的高精密数字频率计的设计  

Design of High Precision Digital Frequency Meter Based on Arduino

作　　者：颜谦和[1] 颜珍平[1] YAN Qian-he;YAN Zhen-ping(Hunan Railway Professional Technology College,Zhuzhou 412001,China)

机构地区：[1]湖南铁道职业技术学院,湖南株洲412001

出　　处：《仪表技术与传感器》2020年第9期55-58,77,共5页Instrument Technique and Sensor

摘　　要：文中基于Arduino,设计了简易高精度数字频率计。针对当前简易频率计精度不够高、测量效率低和人机交互不够友好的缺陷,采用模块化和层次化的设计思路,运用新型的mega2560单片机进行数据的处理和分析,控制显示电路和闸门信号的产生,设计更加友好人机交互界面。电路由电源电路、放大与整形电路、单片机主控电路、分频电路、显示电路、闸门信号产生电路等组成。可实现50 mV^2 V的正弦波和矩形波的频率精准测量。测量范围能够达到1 Hz^10 MHz。测量精度达到0.0001 Hz。Based on Arduino,a simple and high precision digital frequency meter was designed and completed in this paper.Aiming at the shortcomings of current simple frequency meter such as low precision,low measuring efficiency and unfriendly hu-man-computer interaction,the modularization and hierarchical design idea was adopted.The latest mega2560 single chip computer is used to process and analyze data,control the generation of display circuit and gate signal,and design more friendly human-com-puter interaction.The circuit consists of power supply circuit,amplification and shaping circuit,MCU main control circuit,frequen-cy dividing circuit,display circuit,gate signal generation circuit,etc.The frequency of sinusoidal wave and rectangular wave can be measured accurately from 50 mV to 2 V.The measurement range can reach 1 Hz to 10 MHz.The measurement accuracy is 0.0001 Hz.

关 键 词：频率计 ARDUINO 闸门电路 数字信号处理 

分 类 号：TN334[电子电信—物理电子学]