Four-direction monopole directional antenna system and method for borehole radar detection
A monopole antenna, directional antenna technology, applied in electromagnetic wave detection, antenna, resonant antenna and other directions, can solve the problems of multi-antenna structure prone to mutual coupling, unable to complete the sequential feeding of antennas, unable to traverse scanning detection and other problems, Achieve the effect of widening bandwidth, convenient operation and small smearing
Active Publication Date: 2021-04-16
SHANDONG UNIV
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Problems solved by technology
If the number of antennas and reflectors are superimposed in the radial direction of the cylindrical borehole and radiate in different directions, it can be used for directional detection without rotation, but the design of multi-antenna superposition will make the antenna size too large to penetrate Drilling, and the multi-antenna structure in the radial direction is prone to mutual coupling, which affects the directi
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[0040] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0041] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0042] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0043] li...
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The invention provides a four-direction monopole directional antenna system and method for borehole radar detection. The system comprises a borehole radar directional antenna system, a sequential feeding device, an in-borehole walking device, and a cable transmission device, wherein the borehole radar directional antenna system comprises a four-direction directional transmitting monopole antenna group, an omnidirectional receiving antenna and a sleeve, the four-direction directional transmitting monopole antenna group is used for sequentially and directionally radiating electromagnetic waves to each direction, the omnidirectional receiving antenna is used for receiving reflected waves, and the four-direction directional transmitting monopole antenna group and the omnidirectional receiving antenna are arranged in the sleeve; the sequential feeding device is used for sequentially controlling the drilling radar directional antenna system so as to sequentially and directionally radiate electromagnetic waves in different directions at the same depth, and detection without rotation is realized; the in-borehole walking device is arranged on the outer side of the sleeve and drives the whole drilling radar directional antenna system to move in a drilled hole; and the cable transmission device is used for transmitting a detection result of the drilling radar directional antenna system to a processor arranged on the ground and the sequential feeding device. Multi-directional orientation can be achieved without rotation, the diameter size is smaller than the engineering drilling size, the orientation performance is stable, and mutual coupling is avoided.
Description
technical field [0001] The invention belongs to the technical field of borehole radar detection, and in particular relates to a four-direction monopole directional antenna system and method for borehole radar detection. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] The borehole radar method is a broad-spectrum electromagnetic technique for determining the distribution of subsurface media. According to the different resistivity of the underground medium to be detected, the borehole radar detection method is currently divided into single-hole reflection measurement, cross-hole measurement and in-hole-surface measurement. When performing single-hole measurement, the transmitting antenna of the radar emits high-frequency broadband electromagnetic waves, and the receiving antenna receives the reflected waves from the geological body. and ot...
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Login to view more IPC IPC(8): H01Q1/50H01Q9/30H01Q15/14H01Q1/48G01V3/12
CPCY02A90/30
Inventor 刘斌姜雨辰张凤凯李文翰范克睿王佳兴
Owner SHANDONG UNIV
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