| 提取周期微弱信号的几种软件实现方法 |
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| 引用本文： | 杨莺,韦育森.提取周期微弱信号的几种软件实现方法[J].测控技术,2008,27(9). |
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| 作者姓名： | 杨莺 韦育森 |
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| 作者单位： | 西安理工大学,电子工程系,陕西,西安,710048;第四军医大学生物医学工程系,陕西,西安,710032 |
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| 摘 要： | 为了提取被背景噪声覆盖的微弱信号,并降低硬件系统的成本,利用LabVIEW以及M atlab和C语言强大的数据处理能力,研究了3种基于软件的周期微弱信号提取的方法,并用含噪微弱信号,对它们进行了验证与比较。结果说明:通过CLF节点,调用动态链接库(DLL),可以在320 m s内完成10000次长度为512个采样点的数据的累加平均计算,比其余两种方法的计算效率提高277倍和9 742倍。与同功能硬件处理模块比较,计算时间基本在同一个数量级。最后讨论了3种方法的适用场合与数据漂移问题。
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| 关 键 词： | 累加平均 动态链接库 微弱信号 |
Realization Methods for Periodical Weak Signal Detection by Software |
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| YANG Ying,WEI Yu-sen.Realization Methods for Periodical Weak Signal Detection by Software[J].Measurement & Control Technology,2008,27(9). |
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| Authors: | YANG Ying WEI Yu-sen |
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| Abstract: | In order to detect the weak signal with strong noise background and to reduce the cost of hardware system,three weak signal detection methods are investigated.LabVIEW and the data processing capability of Matlab and C language are used to realize the weak signal detection.Verifications and comparisons in these methods are carried out by loading a weak signal with strong noise background.The results indicate that,through the CLF node with dynamic link library(DLL),the 512 sampling data can be accumulated 10000 times and averaged in 320 ms.The computing speed is 277 times and 9742 times faster than that of the other two methods.Compared with the hardware of data processing,the computing speed is in the same order.The application environments and data drift are also discussed.N |
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| Keywords: | accumulation average dynamic link library weak signal |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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