A Joint Imaging Method for Structural and Polarization Properties of Subsurface Targets

An imaging method and attribute technology, applied in the field of geophysical exploration, can solve the problem of inability to combine imaging of underground targets, and achieve the effect of improving signal-to-noise ratio and clear imaging

Active Publication Date: 2018-02-13
JILIN UNIV
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Problems solved by technology

However, the current measurement methods can only reflect the structural information of the target, but cannot simultaneously perform joint imaging of the structure and polarization properties of the underground target.

Method used

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  • A Joint Imaging Method for Structural and Polarization Properties of Subsurface Targets
  • A Joint Imaging Method for Structural and Polarization Properties of Subsurface Targets
  • A Joint Imaging Method for Structural and Polarization Properties of Subsurface Targets

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] see figure 1 , the combination of fully polarized common center point antennas is used, and the vector network analyzer is connected to the fully polarized common center point antenna combination through cables. The three types of polarized antenna combinations are hh, vv and vh. Since the system is Monostatic polarimetric radar, according to the reciprocity theorem S hv = S vh , arrange a survey line above the target body, move the antenna combination along the survey line direction, arrange a survey point at the same distance on the survey line, and measure at each survey point to obtain a 2×2 target volume scat...

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Abstract

The invention relates to a joint imaging method for the structure and polarization attributes of an underground target. A survey line is arranged above the target body, and a combination of fully polarized common center point antennas is moved along the direction of the survey line. Arrange a measuring point, measure the target body scattering matrix at each measuring point, the target body scattering matrix is ​​decomposed by Pauli to obtain the decomposition coefficients α, β, γ corresponding to a measured point underground, and then perform offset processing to obtain the offset The post-migration decomposition coefficients A, B, and C are used to image the migrated scattering matrix to obtain a section view reflecting the structure of the underground target. At the same time, the migration-processed decomposition coefficients A, B, and C are used to obtain the response An image of the polarimetric property information of the target volume. In the invention, the offset is used in the detection of the underground target body by electromagnetic waves, combined with the Pauli decomposition method, an image reflecting both the structure of the underground target body and the polarization attribute of the underground target body is obtained.

Description

technical field [0001] The invention relates to the field of geophysical exploration, in particular to a joint imaging method for the structure and polarization attributes of an underground target. Background technique [0002] In the field of geophysical exploration, the method of using electromagnetic waves to detect underground media is becoming more and more widespread. The electromagnetic pulse signal is transmitted underground through the transmitter, and the reflected signal is received by the receiver, and the data is processed to obtain the structure and attribute information of the underground target. Due to the strong ability of the underground medium to absorb electromagnetic waves, a single form of transmitting and receiving equipment cannot meet the needs of the geophysical exploration field. Polarization information can also be used to perform multiple superimposed measurements on the same underground location, improve the signal-to-noise ratio, obtain data co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/12
Inventor 冯晅恩和得力海张艳梁文婧刘财
Owner JILIN UNIV
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