Dissertation > Excellent graduate degree dissertation topics show

Research on Weak Signal Measure Algorithm for Nuclear Magnetic Resonance Well-logging

Author: DouChengQuan
Tutor: ZhouKaiBo
School: Huazhong University of Science and Technology
Course: Systems Engineering
Keywords: NMR well-logging Weak signal detection LabWindows/CVI
CLC: TP274.5
Type: Master's thesis
Year: 2007
Downloads: 242
Quote: 1
Read: Download Dissertation

Abstract


Nuclear Magnetic Resonance (NMR) nV voltage signal measure technology is one of the key techniques in the NMR weak signal detecting system, while the algorithms for the nV voltage signal detecting is an important component of the technology. This thesis goes deeply into the principles and practical implementation of weak signal detecting algorithms, which is significant in measuring the NMR weak signal, both theoretically and practically.Through precise calculations, the principles of some weak signal measuring methods are deduced, including multi-layer autocorrelation algorithm, digital phase sensitive detection (DPSD) algorithm and cross power spectrum algorithm, etc. Besides, this thesis briefly introduces the C programming language based LabWindows/CVI virtual instrumentation program developing platform, and the program designing for weak signal measuring on the platform. In reference to measure precision and time complexity, a comparison is made among each algorithm of their performances in practical application according to multiple experiments results.Furthermore, the thesis analyzes the causes of errors in each algorithm. A conclusion is drawn that DPSD algorithm best satisfies the requirement of NMR weak signal detection. In the end, feasibility analyses are given according to the application of cross spectrum algorithm. In addition, an improved DPSD algorithm is referred with automatically adjusting frequency of reference signal in order to achieve higher measure precision.

Related Dissertations

  1. XX wind tunnel control software design and implementation,TP311.52
  2. Research on Stochastic Resonance of the Weak Leaked Electromagnetic Signals` Detection in Digital System,TN911.23
  3. Research on Signal Processing Technology of Fiber-optic Hydrogen Sensors Based on DSP,TN911.7
  4. Multi-parameter water quality monitoring self-powered wireless sensor network node key technology research,TN929.5
  5. DSP FPGA -based near-infrared detector key technology research,TN791
  6. Research and Implementation of Formation Resistivity Measurement Based on Electromagnetic Wave Propagation Theory,P631.811
  7. Argon- oxygen refining ferroalloy furnace temperature detection method,TF33
  8. Research of Virtual Ultrasonic-testing System Based Onlabwindows/CVI,TH878.2
  9. Chaos Suppression and Array of Stochastic Resonance Methods for Early Detection of Mechanical Fault,TH165.3
  10. The Data Acqusition and Control System Based on LabWindows/CVI and MATLAB,TP274.2
  11. Weak signal detection mechanism of stochastic resonance network model and its application,TN911.23
  12. Design and Development on Virtual Experiment Platform Based on Labwindows/CVI,TP274
  13. Based on Virtual Instrument electrophoresis production line monitoring system,TP274
  14. Design of an ATS for the Fuze,TP274
  15. Development of Radar Test Device Based on ARM9,TJ760.6
  16. Data Acquisition System Concerning Fourier Transform Spectrometer,TP274.2
  17. The Study of Realizing the Data Acquisition and Underlying Control of Pantograph-Catenery Arc Emi Measure System Based on C Language,TP274.2
  18. The PXI parallel eight-channel data acquisition module design,TP274.2
  19. Based on Labwindows/CVI Train Aerodynamic Software Design of the Test and Data Processing,TP311.52
  20. Research of Voltage Flicker Algorithm and Software Development Based on Virtual Instrument,TM769
  21. Doppler Speed ??Log debug platform display control software design,U666.15

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Automatic detection system using a variety of new technologies
© 2012 www.DissertationTopic.Net  Mobile