| 基于相关算法的电磁流量计抗噪性能研究 |
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| 引用本文： | 张俊,张晓婷,杨海,张娟娟,陈娟.基于相关算法的电磁流量计抗噪性能研究[J].传感器世界,2011,17(5):12-14,18. |
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| 作者姓名： | 张俊 张晓婷 杨海 张娟娟 陈娟 |
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| 作者单位： | 1. 中北大学信息与通信工程学院,山西太原,030051
2. 中北大学,理学院 |
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| 基金项目： | 国防重点实验室基金资助项目 |
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| 摘 要： | 针对电磁流量计在低速测量时,信号被噪声淹没不能准确测量的问题,引入了相关检测算法.本文介绍了相关检测算法进行流量测量的基本原理,通过在电磁流量计测量中引入相关检测算法,滤掉了噪声干扰,提高了信号的信噪比,使电磁流量计在低速或者在低信噪比的情况下测量时,性能有较大改善,精度可达0.5%左右.在低流速时能够稳定的显示数据.
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| 关 键 词： | 低流速 流量测量 互相关法 电磁流量计 |
Research on the anti-noise performance of electromagnetic flowmeters based on coss-correlation algorithm |
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| Zhang Jun,Zhang Xiao Ting,Yang Hai,Zhang Juan Juan,Chen Juan.Research on the anti-noise performance of electromagnetic flowmeters based on coss-correlation algorithm[J].Sensor World,2011,17(5):12-14,18. |
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| Authors: | Zhang Jun Zhang Xiao Ting Yang Hai Zhang Juan Juan Chen Juan |
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| Affiliation: | 1.National Key Laboratory of Electronic Testing Technology,North University of China,Taiyuan 030051,China 2.Department of Mathematics,North University of China,Taiyuan 030051,China |
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| Abstract: | In the low-speed flow measurement of electromagnetic flowmeter,the signals are too weak to be distinguished from the background noise ,which results in unfaithful measurement .Aiming at this problem ,the cross -correlation algorithm is introduced into electromagnetic flow measurement .The basic principle of algorithm is introduced in this paper.By introducing this algorithm,the noise jamming is decreased and the SNR of signal is increased .The performance of electromagnetic flowmeter is improved greatly under the condition of low speed and low SNR.The experiment results show that the accuracy can reach about 0.5% and data can be displayed steadily at last. |
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| Keywords: | low-speed flow measurement cross-correlation method electromagnetic flowmeter |
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