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Helicopter transient electromagnetic detection motion noise suppression device and noise suppression method

A transient electromagnetic and noise suppression technology, applied in measuring devices, electric/magnetic exploration, radio wave measurement systems, etc., to achieve the effects of true and accurate interpretation, reduction of motion noise, and suppression of motion noise

Inactive Publication Date: 2017-07-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a motion noise suppression device suitable for helicopter transient electromagnetic detection for the problem that the posture of the Z component receiving coil vibrates in the horizontal and vertical directions and introduces motion noise;

Method used

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  • Helicopter transient electromagnetic detection motion noise suppression device and noise suppression method
  • Helicopter transient electromagnetic detection motion noise suppression device and noise suppression method
  • Helicopter transient electromagnetic detection motion noise suppression device and noise suppression method

Examples

Experimental program
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Effect test

Embodiment 1

[0054] Under the helicopter 1, the pod support 3 is mounted by the suspension cable 2, and the suspension device 4 is housed on the suspension support 3, and the suspension cable 2, the pod support 3 and the shock absorption device 4 are all made of non-magnetic materials.

[0055] The shock absorber 4 is an annular cavity structure, with the fixed through hole a421, the fixed through hole b422, the fixed through hole c423, the fixed through hole d424, the fixed through hole e425 and the fixed through hole a425 provided on the annular cavity skeleton 41 The through hole f426 fixes the shock absorbing device 4 on the cross-shaped support in the center of the pod support 3 through nylon screws. Before the aerial survey flight, the shock absorbing device 4 is fixed on the pod support 3, and the data acquisition system 7 is placed in the cabin; The Z-component receiving coil 5 is placed on the longitudinal shock absorbing pad a441, the longitudinal shock absorbing pad b442, the lon...

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PUM

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Abstract

The invention relates to a noise suppression device and noise suppression method for helicopter transient electromagnetic detection movement. Shock pad, a longitudinal shock pad is fixed on the bottom plate in the middle of the ring-shaped cavity skeleton, the bottom plate is fixed on the cross-shaped bracket of the pod bracket with nylon screws, and the Z component receiving coil is installed in the ring-shaped cavity of the shock absorbing device. Some are formed on longitudinal shock absorbing pads. The comb filter method is used to process the collected data, and the motion noise separated from the useful signal spectrum after the shock absorber is selectively filtered out, and the motion noise energy is suppressed and the motion noise spectrum is moved through the shock absorber, combined with the selective comb The shape filtering method achieves the purpose of suppressing motion noise more thoroughly, and provides a very important help for subsequent data processing, making the interpretation of underground medium information more realistic and accurate.

Description

[0001] Technical field: [0002] The invention relates to a transient electromagnetic detection noise suppression device and method, in particular to a pod-type helicopter transient electromagnetic detection movement noise suppression device and noise suppression method. [0003] Background technique: [0004] The pod-type helicopter transient electromagnetic exploration device hangs the pod through the helicopter, and the pod is equipped with a transmitter and a Z-component receiving coil. The transmitter transmits a large current signal with a fixed frequency to excite the underground medium. Based on the eddy current effect, the underground medium will generate Magnetic field signal, the Z component receiving coil receives the magnetic field signal, completes the electromagnetic signal conversion and collects it in real time, and realizes the analysis and interpretation of the underground medium. The Z-component receiving coil is the core sensor of the pod-type helicopter tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/165
Inventor 陈晨刘飞王言章林君陈思宇
Owner JILIN UNIV
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