DPSD在低场核磁共振回波信号

波谱学杂志 ›› 2011, Vol. 28 ›› Issue (1): 67-75.

• 低场磁共振技术与应用专栏 • 上一篇下一篇

DPSD在低场核磁共振回波信号

谢庆明¹，肖立志^1* ，于慧俊¹，朱万里²

1. 油气资源与探测国家重点实验室，中国石油大学(北京), 北京 102249； 
2. 中国石油集团测井有限公司，陕西西安 710021

收稿日期:2010-12-20 修回日期:2011-01-02 出版日期:2011-03-05 发布日期:2011-03-05
基金资助:
国家自然科学基金资助项目（41074102），科技部国际合作资助项目(2009DFA61030).

Application of DPSD to NMR Echo Train Detection at Low Field

XIE Qiang-Ming¹, XIAO Li-Zhi^1*, YU Hui-Jun¹, ZHU Man-Li²

1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China; 
2. China Petroleum Logging Ltd., Xi’an 710021, China

Received:2010-12-20 Revised:2011-01-02 Online:2011-03-05 Published:2011-03-05
Supported by:
国家自然科学基金资助项目（41074102），科技部国际合作资助项目(2009DFA61030).

摘要/Abstract

摘要：

核磁共振回波信号幅度微弱，容易受到来自电子器件和外部环境噪声的干扰，要求回波检测方法既能实时采集回波数据，又能较好的抑制噪声. 对比分析不同微弱信号检测方法的优缺点，归纳出DPSD(Digital Phase-Sensitivity Detection)方法在回波检测应用中的优越性. 通过仿真计算，提出适用于回波信号检测的最佳滤波器窗函数. 在自制的核磁共振仪器上进行实验，结果表明，DPSD方法在满足回波信号实时测量的同时，有效压制了噪声，能准确的提取出低场核磁共振回波信号的幅度和相位信息.

关键词: 核磁共振谱仪, 回波检测, DPSD, 数字低通滤波器

Abstract:

In NMR logging, amplitude of NMR echo train is often weak, and vulnerable to noise contamination originated from either electronic devices or external environment. Both real-time acquisition and noise suppression are critical to echo envelope detection. In this paper, advantages and disadvantages of various echo envelope detection methods were reviewed. The superiority of DPSD (digital phase-sensitivity detection) for NMR echo detection was discussed. The optimal filter window function was obtained from simulation of the echo envelope. Experimental results showed that not only real-time measurement and noise reduction could be achieved by DPSD, but also the amplitude and phase could be extracted accurately.

Key words: nuclear magnetic resonance spectrometer, echo detection, DPSD, digital low-pass filter

中图分类号:

谢庆明, 肖立志, 于慧俊, 朱万里. DPSD在低场核磁共振回波信号[J]. 波谱学杂志, 2011, 28(1): 67-75.

XIE Qiang-Ming, XIAO Li-Zhi, YU Hui-Jun, ZHU Man-Li. Application of DPSD to NMR Echo Train Detection at Low Field[J]. Chinese Journal of Magnetic Resonance, 2011, 28(1): 67-75.

参考文献

[1] Coates G R, Xiao L Z, Prammer M G. NMR logging: principles and applications[M]. Texas: Gulf Professional Publishing, 2000.

[2] Xiao Li-zhi(肖立志)，Lu Da-wei(陆大卫)，Chai Xi-yuan(柴细元), et al. NMR logging interpretation and China case studies(核磁共振测井资料解释与应用导论) [M]. Beijing(北京)：Petroleum Industry Press(石油工业出版社)，2001.

[3] Dunn K J, Bergman D J, Latorraca G A. Nuclear magnetic resonance: petrophysical and logging applications[M]. Pergamon: Elsevier Science, 2002.

[4] Hinedi S, Polydoros A. DS/LPI autocorrelation detection in noise plus random-tone interference[C]. IEEE Military Communications Conference, 1988, (v2): 443-447.

[5] Krébesz T, Kolumbán, G, Tse C, et al. Performance improvement of autocorrelation detector used in UWB impulse radio[C]. 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, 2010, 3 761-3 764.

[6] Iqbal, Mohammad A, Grant, et al. A novel normalized cross-correlation based echo-path change detector[C]. 2007 IEEE Region 5 Technical Conference, TPS, 2007, 249-251.

[7] Shi K, Ma X L, Zhou G T. A double-talk detector based on generalized mutual information for stereophonic acoustic echo cancellation systems with nonlinearity[C]. Asilomar Conference on Signals, Systems and Computers, 2008, 2 161-2 164.

[8] Shaw S, Hsiao Y. A quasilinear wide-range radiometer amplifier implemented with correlated phase-sensitive detection[J]. Review of Scientific Instruments, 1999, 70(5): 2 533-2 536.

[9] Tapson J. Mixed signal phase sensitive detection[C]. 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, 2010, 1 292-1 295.

[10] Mathew G, Farhang-Boroujeny B, Ng C. Design of analog equalizers for partial response detection in magnetic recording[C]. IEEE Transactions on Magnetics, 2000, 36(4 II): 2 098-2 108.

[11] Lascos S, Cassidy D. Multichannel digital phase sensitive detection using a field programmable gate array development platform[J]. Review of Scientific Instruments, 2008, 79(7): 074702.

[12] Tseitlin M, Iyudin V, Tseitlin O. Advantages of digital phase-sensitive detection for upgrading an obsolete CW EPR spectrometer[J]. Applied Magnetic Resonance, 2009, 35(4): 569-580.

[13] Hartley M, Frigo L, Frigo F, et al. Method and apparatus of MR data acquisition using ensemble sampling: US, 6564081[P]. 2003-05-13.

[14] Dai yi-song(戴逸松), Shi Yao-wu(石要武). An approach using cross power spectrum estimator for measurement of nV sinusoidal signal(测量nV正弦电压的互功率谱方法)[J]. Transactions of China Electrotechnical Society(电工技术学报), 1992, 2.

[15] Li Xing-chen(李星辰). Research on the adaptive detection method of weak sinusoidal signal(正弦弱信号的自适应检测方法的研究)[D]. Chongqing(重庆): Chongqing University(重庆大学), 2009.

[16] Gao Jin-zhan(高晋占). Detection of Weak Signals(微弱信号检测)[M]. Beijing(北京)：Tsinghua University Press(清华大学出版社)，2004.

[17] Dai Yi-song(戴逸松). Weak signal detection method and apparatus(微弱信号检测方法及仪器)[M]. Beijing(北京)：National Defence Industry Press(国防工业出版社)，1994.

[18] Zu Dong-lin(俎栋林). Magnetic resonance imaging(核磁共振成像学)[M]. Beijing(北京): Higher Education Press(高等教育出版社)，2004.

[19] Hu Hai-tao(胡海涛), Xiao Li-zhi(肖立志). Inverstigation characteristics of NMR wireline logging tools(电缆核磁共振测井仪探测特性研究)
[J]. Chinese J Magn Reson(波谱学杂志), 2010, 27(4): 572-583.

[20] Li Rui(李睿), Xiao Liang(肖亮), Wang Wei-min(王为民). The design of a digital receiver system for MRI scanners(磁共振成像信号的数字化接收系统设计)[J]. Chinese J Magn Reson(波谱学杂志), 2009, 26(3): 359-368.

[21] Xiao Liang(肖亮), Tang Wei-nan(汤伟男), Wang Wei-min(王为民). An FPGA-based single-chip gradient calculation module for magnetic resonance imaging(基于单片FPGA的磁共振成像梯度计算模块)[J]. Chinese J Magn Reson(波谱学杂志), 2010, 27(2): 163-171.

[22] Liu Yue, Wang Yong-tian, Yan Da-yuan, et al. DPSD algorithm for AC magnetic tracking system[C]. 2004 IEEE Symposium on Virtual Environments, Human-Computer Interfaces and Measurement Systems, VECIMS, 2004, 101-106.

[23] Zhang Xin-fa(张新发), Liu Fu(刘富), Dai Yi-song(戴逸松). Study on DPSD algorithm performance with parameter selection(DPSD算法性能研究及参数选择)[J]. Journal of Jilin University of Technology(吉林工业大学学报), 1998, 3(28): 40-45.

[24] Liu Sheng-hu(刘升虎), Xing Ya-min(邢亚敏). Application of digital phase sensitive demodulation for electromagnetic propagation resistivity logging while drilling(DPSD技术在随钻电阻率测井中的应用)[J]. Well Logging Technology(测井技术), 2008, 32(1): 69-71.

[25] Hu Guang-shu(胡广书). Digital signal processing(数字信号处理)[M]. Beijing(北京)：Tsinghua University Press(清华大学出版社)，2003.

DPSD在低场核磁共振回波信号

Application of DPSD to NMR Echo Train Detection at Low Field

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