| 基于单片机的频率跟踪系统设计 |
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| 引用本文： | 刘京诚,罗勇,刘俊,任松林. 基于单片机的频率跟踪系统设计[J]. 电子测量技术, 2008, 31(6) |
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| 作者姓名： | 刘京诚 罗勇 刘俊 任松林 |
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| 作者单位： | 重庆大学光电技术及系统教育部重点实验室,重庆,400044 |
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| 摘 要： | 本文设计了一种测量信号频率的系统。它利用ADC0809芯片把模拟信号变成数字信号,然后通过单片机MSC-51对数字信号做快速傅立叶变化(FFT),得到信号的频谱。通过分析处理该频谱,从而找到信号的频率。最后分析了这种基于快速傅立叶变化测量频率方法的精度,并提出了改善精度的方法。
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| 关 键 词： | 频谱分析 快速傅立叶变化(FFT) 单片机 模数转换(A/D) |
Design of measuring system for the frequency of signals based on single chip machine |
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| Liu Jingcheng,Luo Yong,Liu Jun,Ren Songlin. Design of measuring system for the frequency of signals based on single chip machine[J]. Electronic Measurement Technology, 2008, 31(6) |
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| Authors: | Liu Jingcheng Luo Yong Liu Jun Ren Songlin |
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| Abstract: | A method of measuring the frequency of signals is presented.It changes analog signals into digital signals by using ADC0809 chip,and then does the fast fourier transform(FFT) with the digital signals in the single chip machine of AT89C51 to get the spectrum of the signals.Through analyzing the spectrum,the frequency of signals is found.At last,the precision of the method that bases on FFT is discussed,and the method to improve the precision is put forward. |
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| Keywords: | spectral analysis fast fourier transform(FFT) single chip machine analog-digital conversion |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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