| 消除电网工频信号干扰的陷波电路设计 |
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| 引用本文： | 任洪林,陈玥名.消除电网工频信号干扰的陷波电路设计[J].佳木斯大学学报,2007,25(1):5-6,13. |
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| 作者姓名： | 任洪林 陈玥名 |
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| 作者单位： | 哈尔滨工业大学,黑龙江哈尔滨150001 |
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| 摘 要： | 工频干扰存在于各种数据采集系统中,直接影响被测信号的测量精度.针对电网频率波动的实际情况,基于双T型阻容有源陷波电路,设计了可以滤除频带在49.5～50.5Hz之间工频干扰的陷波电路.详细地分析了所设计陷波电路的陷波深度与被测信号失真的关系,并给出了其幅相特性.提出的陷波电路信噪比可达60dB以上.通过仿真试验验证了设计的陷波电路具有较好的滤波效果.
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| 关 键 词： | 信号采集 工频干扰 陷波电路 电网 信号干扰 陷波深度 电路设计 Network Electric Interference Power Circuit Trap 滤波效果 试验验证 仿真 信噪比 幅相特性 关系 信号失真 分析 频带 陷波电路 |
| 文章编号： | 1006-1402（2007）01-0005-02 |
| 收稿时间： | 2006-10-20 |
| 修稿时间： | 2006-10-20 |
The Design of Trap Circuit to Eliminate the Power Interference in Electric Network |
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| REN Hong-lin,CHEN Yue-ming.The Design of Trap Circuit to Eliminate the Power Interference in Electric Network[J].Journal of Jiamusi University(Natural Science Edition),2007,25(1):5-6,13. |
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| Authors: | REN Hong-lin CHEN Yue-ming |
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| Institution: | Harbin Institute of Technology, 150001, China |
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| Abstract: | Power interference exists in diversified data acquisition system. It directly affects the precision of measured signal. Aiming at actual instance that the frequency of electric network is waving, based on twin- T resistance- capacitance active- trap filter, a trap filter which can filter the power interference between 49.5Hz and 50. 5Hz is designed. The relation between the depth of the notch and the distortion of measured signal is amply analyzed. The amplitude- frequency character and phase- frequency character is given. The signal- to- noise ratio of the designed trap filter is more than 60dB. The emultional experimentation proves that the desigr can reach good filter effect. |
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| Keywords: | signal acquisition power interference trap filter |
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