| 慢速A/D转换中工频干扰的去除 |
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| 引用本文： | 刘丽,司汉英,马洪蕊. 慢速A/D转换中工频干扰的去除[J]. 光电技术应用, 2010, 25(2): 48-50 |
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| 作者姓名： | 刘丽 司汉英 马洪蕊 |
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| 作者单位： | 光电系统信息控制技术国家级重点实验室,河北,三河,065201;光电系统信息控制技术国家级重点实验室,河北,三河,065201;光电系统信息控制技术国家级重点实验室,河北,三河,065201 |
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| 基金项目： | 光电系统信息控制技术国家级重点实验室基金 |
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| 摘 要： | 工频干扰是各类信息设备及信号处理中最常见的一种干扰信号,若不去除将大大影响测量精度.首先分析工频干扰对模拟信号的影响,然后根据干扰的特点设计了控制电路来控制A/D转换器的采样频率,实现了采样频率与工频同步,从而达到有效地去除工频干扰.最后用标定的方法,得出了A/D转换器输出数值与输入模拟信号间对应的理想数学关系式.
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| 关 键 词： | 工频干扰 A/D转换 模拟信号 标定 |
Removal of Slow A/D Conversion Frequency Interference |
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| LIU Li,SI Han-ying,MA Hong-rui. Removal of Slow A/D Conversion Frequency Interference[J]. Electro-Optic Technology Application, 2010, 25(2): 48-50 |
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| Authors: | LIU Li SI Han-ying MA Hong-rui |
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| Affiliation: | (National Laboratory of Electro-Optics System Technology,Sanhe 065201,China) |
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| Abstract: | Frequency interference is the most common form of interference signals in all kinds of information equipment and signal processing.If the frequency interference is not removed,it would affect the measurement accuracy.In the beginning,the frequency interference on the impact of the analog signal was analyzed,then according to the characteristics of interference,a control circuit to control sampling frequency was designed,and the sampling frequency and frequency synchronization were realized,and so as to effectively remove the frequency interference.Finally by the method of calibration,the ideal mathematical relationship of the output values and the input analog signal were obtained. |
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| Keywords: | frequency interference A/D conversion analog signal calibration |
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