| 基于MSP430高精度数字电流仪的设计 |
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| 引用本文： | 于本化,孔令彬,郑晓航. 基于MSP430高精度数字电流仪的设计[J]. 电子工业专用设备, 2008, 37(1): 65-68 |
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| 作者姓名： | 于本化 孔令彬 郑晓航 |
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| 作者单位： | 中国地质大学,湖北,武汉,430074 |
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| 摘 要： | 设计了一套基于MSP430超低功耗在线测量电流仪,可以精密测量小范围内的电流强度。分析了干扰噪声对测量的影响。在硬件电路设计中利用了二极管的门坎电压,在软件设计中引入了小波算法对信号进行降噪处理。给出了中心频率为50Hz,额定电流为200mA的小电流试验结果,试验结果和实际运行情况表明,在常用工频附近,其准确度可达0.5%,该技术已在强电磁场下应用,其性能稳定、可靠。
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| 关 键 词： | 电流仪门坎电压 小波算法 强电磁场 |
| 文章编号： | 1004-4507（2008）01-0065-04 |
| 收稿时间： | 2008-01-06 |
| 修稿时间： | 2008-01-06 |
High Accuracy and Digital Amperemeter With MSP430 |
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| YU Ben-hua,KONG Ling-bin,ZHENG Xiao-hang. High Accuracy and Digital Amperemeter With MSP430[J]. Equipment for Electronic Products Marufacturing, 2008, 37(1): 65-68 |
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| Authors: | YU Ben-hua KONG Ling-bin ZHENG Xiao-hang |
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| Abstract: | A novel on-line monitoring and measure amperemeter is presented based on MSP430 designed to measure small current. The system adopts diode threshold voltage and wavelet transform algorithm to denoise. The rated current is 200mA when the centre frequency is 50Hz and the veracity is 0.5%. Field tests show that the system is reliability and dependability in lightning electromagnetic field. |
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| Keywords: | amperemeter threshold voltage wavelet transform algorithm electromagnetic field |
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