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Method for airborne electromagnetic early-time data detection of helicopter through deconvolution rapid optimization

An airborne electromagnetic and deconvolution technology, applied in electric/magnetic exploration, radio wave measurement systems, measurement devices, etc., can solve the problems of early data unavailability, increase effective detection range, high efficiency, and optimize data quality Effect

Inactive Publication Date: 2017-08-08
JILIN UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] This method is aimed at the problem that the measurement data of the helicopter avionics electromagnetic system is affected by the system response and the early data is unavailable

Method used

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  • Method for airborne electromagnetic early-time data detection of helicopter through deconvolution rapid optimization
  • Method for airborne electromagnetic early-time data detection of helicopter through deconvolution rapid optimization
  • Method for airborne electromagnetic early-time data detection of helicopter through deconvolution rapid optimization

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Take a piece of field measurement data with good flight conditions as an example:

[0052] First, input the induced electromotive force data measured by the time-domain helicopter-type airborne electromagnetic detection system during high-altitude flight, set a set of m measuring points, and each measuring point has n sampling points for the induced electromotive force data received by the airborne electromagnetic detection system when flying at high altitude V 0 (n×m), then superimposed into a measuring point V 0 (n).

[0053]

[0054] Enter the emission current corresponding to the induced electromotive force of the airborne electromagnetic detection system when flying at high altitude, set a group of m measuring points, and the current data I emitted by the airborne electromagnetic detecting system when flying at high altitude with n sampling points for each measuring point 0 (n×m).

[0055]

[0056] The induced electromotive force V received at high altitud...

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Abstract

The invention relates to a method for airborne electromagnetic early-time data detection of a helicopter through deconvolution rapid optimization. The method is characterized in that a deconvolution computation method is introduced into time domain airborne electromagnetic data processing with trapezoidal waves as the transmitting waveform, reasonable modification is performed, and characteristic response of the system per se is removed, so that the effective time selection of an early time data track is shifted to an earlier date, further, near ground detection is assisted, the airborne electromagnetic detection range is expanded, and significance on solving of problems in such aspects as environment, energy source and military affairs is achieved. As system response is simply, quickly and efficiently removed via deconvolution, the problem of early response vibration due to existence of the system is solved, the data quality of the early time track is optimized, early available data in the current cut-off period are advanced by 4-5 points, the advance time is about 0.13 ms, data application of the early data track becomes possible, and the effective detection range of airborne electromagnetic detection is expanded via conversion according to a skin depth formula.

Description

technical field [0001] The invention relates to a deconvolution method for quickly optimizing the early data of a helicopter aeronautical electromagnetic detection system, which belongs to a time-domain aeronautical electromagnetic data processing method. Background technique [0002] Airborne Electromagnetic (AEM) is a geophysical prospecting method based on an aircraft (usually an airplane) and based on the theory of electromagnetic induction. It is widely used in basic geological survey, mineral resource exploration, oil and gas exploration, hydrology, engineering, environmental exploration and other fields. [0003] The main frequency range of the time-domain airborne electromagnetic method is 5 to 25 kHz, and various interferences are inevitable during the data acquisition process, and these noises are often related to factors such as acquisition time, acquisition location, and acquisition system. The fundamental purpose of airborne electromagnetic detection is to anal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/38G01V3/165
CPCG01V3/38G01V3/165
Inventor 朱凯光于紫凝李凯艳彭聪张琼
Owner JILIN UNIV
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