Fixed wing airborne electromagnetic data conductivity depth imaging method with system auxiliary parameters

An auxiliary parameter and airborne electromagnetic technology, which is applied in the fields of radio wave measurement system, sound wave reradiation, electric/magnetic exploration, etc., can solve problems such as conductivity depth imaging method of fixed-wing airborne electromagnetic data that has not yet been seen

Inactive Publication Date: 2018-11-06
JILIN BUSINESS & TECH COLLEGE
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Problems solved by technology

However, in the above conductivity depth imaging algorithms, only part of the flight parameters (height, pitch) of the electromagnetic system are introduced for CDI imaging, which still cannot avoid the problem that the accuracy of t

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  • Fixed wing airborne electromagnetic data conductivity depth imaging method with system auxiliary parameters
  • Fixed wing airborne electromagnetic data conductivity depth imaging method with system auxiliary parameters
  • Fixed wing airborne electromagnetic data conductivity depth imaging method with system auxiliary parameters

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0046] See attached figure 1 As shown, firstly, when the flight altitude h=120m, the roll angle roll=0°, and the yaw angle yaw=0°, 41 pitch angles are selected at intervals of -20°-20°, and the half-space model Select 64 samples with near equilogarithmic intervals of 0.0025-20 to form 41×64 groups of half-space detection models, and use the fixed-wing airborne electromagnetic one-dimensional forward calculation algorithm to calculate the 14 time channels (0.01-10ms) corresponding to each model. The B field response of the x component and z component of , divided by time channel, establishes 14 B field x -B z -Conductivity-pitch angle data table, see attached figu...

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Abstract

The invention belongs to the field of processing methods for time domain airborne electromagnetic data and discloses a fixed wing airborne electromagnetic data conductivity depth imaging method with system auxiliary parameters. The fixed wing airborne electromagnetic data conductivity depth imaging method comprises the following steps: establishing all time channel data tables at multiple fixed flight heights, fixed swing angles, fixed yaw angles and fixed pitch angles; sequentially extracting data and date tables corresponding to time channels; determining the positions of measured data in the tables, and determining apparent conductivity and all auxiliary parameter values according to a linear interpolation algorithm; if the measured data meet a set threshold, outputting the conductivityand auxiliary parameters; judging whether conductivity query of all time channels is finished or not; and obtaining imaging depth according to a skin effect formula. The algorithm is high in imagingspeed and efficiency, meets the requirements of aviation transient electromagnetic processing on mass data, and lays an important science and technology base for rapid exploration capability of mineral resources in China.

Description

technical field [0001] The invention relates to the technical field of time-domain aeronautical electromagnetic data processing methods, in particular to a fixed-wing aeronautical electromagnetic data conductivity depth imaging method with system auxiliary parameters. Background technique [0002] Fixed-wing aeronautical electromagnetic detection is a geophysical detection method based on Faraday's law of electromagnetic induction, using a fixed-wing aircraft as a carrier, and using a dipole-dipole transceiver device. It has the advantages of high exploration efficiency and low cost, and is widely used in geological exploration , oil and gas exploration, hydrological census and other fields. The amount of fixed-wing aeronautical electromagnetic data is huge, and it will take time and effort to invert and interpret all the data. Generally, Conductivity-Depth Imaging technology (CDI, Conductivity-Depth Imaging) is used to quickly process massive airborne electromagnetic data ...

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Application Information

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IPC IPC(8): G01V3/38
CPCG01V3/38
Inventor 李冰冰季宏宇宋少忠王静申东东刘哲刘建男
Owner JILIN BUSINESS & TECH COLLEGE
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