| 一种基于单片机的数字频率计的实现 |
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| 引用本文： | 刘竹琴,白泽生. 一种基于单片机的数字频率计的实现[J]. 现代电子技术, 2010, 33(1): 90-92,96 |
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| 作者姓名： | 刘竹琴 白泽生 |
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| 作者单位： | 延安大学物理与电子信息学院,陕西,延安,716000 |
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| 基金项目： | 陕西省教育厅专项基金 |
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| 摘 要： | 设计一种以单片机AT89C51为核心的数字频率计，介绍了单片机、数字译码和显示单元的组成及工作原理。测量时，将被测输入信号送给单片机，通过程序控制计数，结果送译码器74LS145与移位寄存器74LS164，驱动LED数码管显示频率值。通过测量结果对比，分析了测量误差的来源，提出了减小误差应采取的措施。频率计具有电路结构简单、成本低、测量方便、精度较高等特点，适合测量低频信号。
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| 关 键 词： | 单片机 数字频率计 测频 译码 |
Design of Digital Frequency Meter Based on Single Chip Mircrocomputer |
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| LIU Zhuqin,BAI Zesheng. Design of Digital Frequency Meter Based on Single Chip Mircrocomputer[J]. Modern Electronic Technique, 2010, 33(1): 90-92,96 |
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| Authors: | LIU Zhuqin BAI Zesheng |
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| Affiliation: | (Physics and Electronic Information College,Yan＇an,716000,China) |
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| Abstract: | A digital frequency meter based on AT89C51 is designed,the composition and working principle of single chip microcompter,digital decoder and display unit are introduced.The measured input signal should be given to single chip microcomputer,through the counting process control,the results are sent to decoder 74 LS145 and shift register 74 LS164,driven LED digital display of frequency value.By comparing results,the source of measurement error is analysed,the measures are proposed for reducing errors.The frequ... |
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| Keywords: | single chip microcomputer digital frequency meter frequency measurement decoder |
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