Dissertation > Excellent graduate degree dissertation topics show

The Multi-component Interpretation Technology of Transient Electromagnetic Method

Author: QiZhiPeng
Tutor: LiZuo
School: Chang'an University
Course: Earth Exploration and Information Technology
Keywords: transient electromagnetic method (TEM) multi-component interpretation Sommerfeld-integrals curve-fitting definition of apparent resistivity
CLC: P631.325
Type: Master's thesis
Year: 2009
Downloads: 263
Quote: 7
Read: Download Dissertation

Abstract


The multi-component interpretation technology of transient electromagnetic method (TEM) is helpful to the application of TEM sounding in the project survey, the tunnel prediction ,the investigation of coalfield geological disasters, and so on.Transient electromagnetic sounding method is always interpreted by the vertical component of the central point. However, there are a few measuring points acquired when surveying in road tunnels, railway tunnels and coal fields. With a few collection points of vertical component measurement, it will definitely affect the accuracy of detection and the explanation work will be more difficult. To improve the detection accuracy is bound to increase the number of measuring points, therefore, collecting the field value of multi-component is very necessary.This paper studied the numerical calculating method of both the vertical and the horizontal component response of the magnetic field under different offset, in the uniform and layered medium, by the large loop exciting source. Also, this paper pushed over the expression of apparent resistivity defined by the vertical component and horizontal component, and provided theoretical basis for the multi-component interpretation technology of transient electromagnetic method.The calculation method of Sommerfeld integrals was first discussed, through which obtained the frequency function of each component of non-central point under different offset. Then the two functions were compared with the vertical component of the central point, and it was found that they had the same form. The polynomials and their coefficients were obtained respectively with the curve-fitting method and the least square method. The expression of the apparent resistivity of non-central point was defined by the same method as the vertical component at the centre point. At last, using the apparent resistivity expressions, which derived from the method above, explained the actual data in the model, and compared with the vertical component in the central point, and the result showed that the multi-component interpretation technology of transient electromagnetic method not only improved the accuracy of exploration, but also distinctly displayed the boundary of the low resistivity body.

Related Dissertations

  1. Research on Detecting Optical Fiber Geometric Parameter Based on Machine Vision,TN253
  2. sEMG Signal Changes on Lower Limb Musculus Fatigue during Cycling Exercise Process,G872.3
  3. Automotive the starter performance of high-precision high stability of the test method and application,U467
  4. Study on Optimal Operation Strategies of Air Conditioning System,TU831.3
  5. A Preliminary Study of Quantitative Cervical Vertebral Maturation Based on Computer Aided Cervical Vertebra Analysis,R783.5
  6. Improve vehicle missile launchers deformation Method of measurement accuracy,TJ768.21
  7. Pipeline magnetic flux leakage detection signal reconstruction technology within,TN911.23
  8. Based on reported target image technology Intelligent System Design,TP391.41
  9. Unmanned intelligent vehicle based on monocular vision -based road detection,TP391.41
  10. Lacustrine soft soil physical and mechanical properties and the creep characteristics of,U212.22
  11. Autopilot system for vision-guided AGV,TP391.41
  12. Signal Preprocessing and Induced Polarization Effect Recognition on Transient Electromagnetic Measurement,P631.325
  13. Curve Fitting of Time Series with Equidistant Sampling Points,O211.61
  14. Optimization of Converter Repair Project Based on Genetic Algorithm,TF748.2
  15. Research and Application of the Discrete Data Fitting Model,TM743
  16. Research on Voltage Stability Evaluation Index and Its Algorithm of Large-scale Power Grid,TM712
  17. Passive Acoustic Sensor Network Target Probabilistic Localization Algorithm,TP212.9
  18. The Research on Vectorization of Handcraft Drawing Complex Carving Pattern,TP391.41
  19. Research and Development of Computer Control System for Over-Current Testing of Frame Circuit Breaker,TM561
  20. Research on Bored Pile Post-grouting Technology Mechanism,TU473.1
  21. Research of Digital Track Map for GNSS Based Train Positioning System,U29-39

CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Electrical prospecting > Method > Electromagnetic Method
© 2012 www.DissertationTopic.Net  Mobile