| 核磁共振测井仪中调幅弱信号检测技术探讨 |
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| 引用本文： | 张晨,吴磊,程晶晶. 核磁共振测井仪中调幅弱信号检测技术探讨[J]. 数字技术与应用, 2010, 0(10): 150-152 |
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| 作者姓名： | 张晨 吴磊 程晶晶 |
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| 作者单位： | 华中科技大学控制科学与工程系,湖北武汉430074 |
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| 摘 要： | 本文探讨了用于检测核磁共振回波信号的数字相敏检波（DPSD）算法的性能。通过理论计算对基于IIR的DPSD算法和累加平均DPSD算法的误差进行了分析,讨论了两种算法与实际测井参数之间的关系。仿真实验给出了两种算法对于提取低信噪比回波信号时的精度,对比了不同滤波时间下的幅频特性,发现两种算法各有优劣,在应用中需要根据实际测井参数和要求选择适当的算法。
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| 关 键 词： | DPSD算法 调幅信号 核磁共振测井 |
A Study on Measuring Weak Magnitude Modulation Signals in NMR Logging |
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| Zhang Chen,Wu Lei,Cheng Jingjing. A Study on Measuring Weak Magnitude Modulation Signals in NMR Logging[J]. Digital Technology & Application, 2010, 0(10): 150-152 |
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| Authors: | Zhang Chen Wu Lei Cheng Jingjing |
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| Affiliation: | Control Science and Engineering,Huazhong University of Science and Technology(Wuhan) |
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| Abstract: | In this paper,the performance of DPSD algorithm for detecting NMR echo signal has been discussed.Through theoretical arithmetic,the error of IIR DPSD algorithm and cumulative average DPSD algorithm has been analyzed.And it also discusses the relationship between two methods and log parameters.Simulation shows the accuracy of two methods in detecting echo signal with low signal-to-noise ratio（SNR）,and compares the amplitude-frequency characteristics with different filter time.It found that two algorithms have each advantages and disadvantages.To choose proper algorithm needs according to actual logging parameters and demands in application. |
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| Keywords: | DPSD algorithm AM signal NMR logging |
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