CN104393418A - Well logging radar directional monopole antenna - Google Patents
Well logging radar directional monopole antenna Download PDFInfo
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- CN104393418A CN104393418A CN201410738806.0A CN201410738806A CN104393418A CN 104393418 A CN104393418 A CN 104393418A CN 201410738806 A CN201410738806 A CN 201410738806A CN 104393418 A CN104393418 A CN 104393418A
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- Prior art keywords
- monopole
- antenna
- monopole antenna
- well logging
- directed
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Abstract
The invention relates to a well logging radar directional monopole antenna. The antenna comprises a radiation monopole (1), a supporting metal column (2), a feeding point, a packing medium (3), a floor (4), a reflecting plate (5) and a lumped element (6), wherein the radiation monopole (1) is connected with a positive electrode of the feeding point through the supporting metal column (2) and is embedded in the packing medium (3); the floor (4) is connected with a negative electrode of the feeding point; the reflecting plate (5) is arranged behind the radiation monopole (1); the floor (4) is connected with the reflecting plate (5); the lumped element (6) is loaded between the reflecting plate (5) and the radiation monopole (1). The directional monopole antenna has the main characteristics of small size, simple structure and high front-to-back ratio of radiation power of the directional antenna, has the advantages of small receiving waveform trailing, good antenna impedance matching, firm structure and cylindrically conformal shape, and is particularly suitable for a single-hole directional well logging radar system.
Description
Technical field
The present invention relates to the directed monopole antenna of a kind of well logging radar, especially a kind of well logging radar monopole antenna with orientating function.
Background technology
Hole drilling type well logging radar is a kind of impulse radar based on impulse signal generation, transmission, radiation, reception, data acquisition, data processing and imaging.It relies on accurate measurement target thing to reflect time difference of impulse electromagnetic signal and waveform parameter difference to judge position or the shape of object, is the ULTRA-WIDEBAND RADAR (Ultra wideband radar, UWB) of a kind of typical case based on impulse system.In hole drilling type geologic structure exploration scheme, have employed and replace servo solutions with directional antenna array, improve the stability of a system, useful life, and simplify system configuration; Because impulse radar system power dissipation is low, thus have employed battery-driven Project Realization scheme, greatly improve the flexibility of system and the practicality of complex survey environment; In dual-mode antenna design, propose the design of strict restriction antenna E face and H face time domain directional diagram, most important to raising radar system image quality.Simultaneously, due to the restriction of borehole space, with the restriction of HTHP applied environment, the design of directional antenna is had higher requirement, wherein most important is exactly ratio before and after antenna radiated power, and namely the directionality of antenna wants high, and antenna size is little, simultaneously firm in structure, adapt to the particular surroundings requirement of hole drilling type well logging radar system.
Summary of the invention
The object of this invention is to provide the directional well logging radar antenna that a kind of structure is simple, the stability of a system is high, detection range is far away.
Object of the present invention is mainly achieved through the following technical solutions:
The directed monopole antenna of a kind of well logging radar, comprises radiating monopole (1), support metal post (2), distributing point, filled media (3), floor (4), reflecting plate (5) and lamped element (6); Described radiating monopole (1) is connected with described distributing point positive pole by described support metal post (2), described radiating monopole (1) is embedded in described filled media (3), described floor (4) is connected with distributing point negative pole, described radiating monopole (1) arranges described reflecting plate (5) behind, described floor (4) is connected with described reflecting plate (5), loads described lamped element (6) between described reflecting plate (5) and described radiating monopole (1).
The shape of described radiating monopole (1) can be fan-shaped.
The shape of described support metal post (2) can be cylindrical.
Described floor (4) and described filled media (3) can be cylindrical, and external diameter is identical.
Described floor (4), described reflecting plate (5) and described filled media (3) can be cylindrical.
Described reflecting plate (5) can be placed in the outside of described filled media (3).
Described support metal post (2) can also be embedded in filled media (3).
The impedance of described antenna can be 50 ± 2 Ω.
Described filled media can be the medium of 4 for dielectric constant.
A kind of directional well logging radar system, comprises the directed monopole antenna of described well logging radar.
Beneficial effect of the present invention is as follows:
The directional antenna that the present invention relates to adopts the back side to add the monopole antenna of reflecting plate, and realize the directed radiation of antenna, the front and back ratio of antenna radiated power reaches 5:1; Load lumped-parameter element by end, realize the end reflection of minimizing antenna, waveform is clean, trail little.Being the medium of 4 by loading dielectric constant, making the size of antenna reduce 1/2, simultaneously firm in structure and better mate with high-k rock; The profile of institute's invention directional antenna and characteristics of conformal, better adapt to the actual application environment of well logging radar.The present invention is little with directed monopole antenna size, structure is simple, before and after the radiant power of directional antenna than high for main feature, and it is little to receive waveform hangover, Antenna Impedance Matching is good, firm in structure, with characteristics of conformal, be specially adapted to hole drilling type directional well logging radar system.
Other features and advantages of the present invention will be set forth in the following description, and, becoming apparent from specification of part, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing only for illustrating the object of specific embodiment, and does not think limitation of the present invention, and in whole accompanying drawing, identical reference symbol represents identical parts.
Fig. 1 is that the present invention logs well the directed monopole antenna front view of radar.
Fig. 2 is that the present invention logs well the directed monopole antenna vertical view of radar.
Fig. 3 is that the present invention logs well the directed monopole antenna end view of radar.
Fig. 4 is that the present invention logs well the radiation waveform of the directed monopole antenna of radar under granite borehole environment.
Fig. 5 is that the present invention logs well the radiation waveform fidelity coefficient of the directed monopole antenna of radar under granite borehole environment.
Fig. 6 is that the present invention logs well the H face time domain directional diagram of the radiation waveform of the directed monopole reception antenna of radar under granite borehole environment.
Embodiment
Specifically describe the preferred embodiments of the present invention below in conjunction with accompanying drawing, wherein, accompanying drawing forms the application's part, and together with embodiments of the present invention for explaining principle of the present invention.
As shown in Figure 1, Figure 2, Figure 3 shows, the present embodiment is the directed monopole antenna of well logging radar, comprises radiating monopole 1, support metal post 2, distributing point, filled media 3, floor 4, reflecting plate 5 and lamped element 6.Described radiating monopole 1 is connected with described distributing point positive pole by described support metal post 2, described radiating monopole 1 is embedded in described filled media 3, described floor 4 is connected with distributing point negative pole, described radiating monopole 1 arranges described reflecting plate 5 behind, described floor 4 is connected with described reflecting plate 5, loads described lamped element 6 between described reflecting plate 5 and described radiating monopole 1.
Radiating monopole can be the shapes such as rectangle, cylinder, but the fan-shaped bandwidth can expanding antenna to greatest extent, through making the optimization of fan-shaped chamfering etc., radiation waveform is more clean, hangover concussion is little simultaneously.
Support metal post can be elliptical cylinder-shape etc., preferably cylindrical.
In order to obtain better effect, one of following design can be selected:
1) described floor and described filled media are cylindrical, and external diameter is identical.
2) described floor, described reflecting plate and described filled media are cylindrical.Object is holed conformal with well logging, better adapts to the actual application environment of well logging radar.
3) described reflecting plate is positioned over the outside of described filled media.
4) for improving the robustness of antenna, can design to become support metal post is also embedded in filled media.
5) impedance of the antenna described in is all at 50 ± 2 Ω.
6) described lamped element is that resistance and capacitances in series load.
Fig. 4 is that the present invention logs well the radiation waveform of the directed monopole antenna of radar under granite borehole environment, and simulation result and experimental results coincide good, and the hangover of antenna is shaken little.
Fig. 5 is that the present invention logs well the radiation waveform fidelity coefficient of the directed monopole antenna of radar under granite borehole environment, and waveform fidelity coefficient is high, is greater than 0.8.
Fig. 6 is that the present invention logs well the H face time domain directional diagram of the radiation waveform of the directed monopole antenna of radar under granite borehole environment, than arriving 5:1 before and after the radiant power of antenna, has good orientating function.
In sum, embodiments provide a kind of directional antenna and adopt the back side to add the monopole antenna of reflecting plate, realize the directed radiation of antenna, the front and back ratio of antenna radiated power reaches 5:1, as shown in Fig. 6 test result; Load lumped-parameter element by end, realize the end reflection of minimizing antenna, waveform is clean, trail little, as shown in the waveform testing result of Fig. 4; Being the medium of 4 by loading dielectric constant, making the size of antenna reduce 1/2, simultaneously firm in structure and better mate with high-k rock; The profile of institute's invention directional antenna and characteristics of conformal, antenna and filled media are fitted completely, and tight is firm in structure, and the actual borehole space of better adaptation well logging radar is little, the applied environment of high temperature, high pressure.The present invention is little with directed monopole antenna size, structure is simple, before and after the radiant power of directional antenna than high for main feature, and it is little to receive waveform hangover, Antenna Impedance Matching is good, firm in structure, with characteristics of conformal, be specially adapted to hole drilling type directional well logging radar system.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (10)
1. radar orientation of a logging well monopole antenna, comprises radiating monopole (1), support metal post (2), distributing point, filled media (3), floor (4), reflecting plate (5) and lamped element (6); Described radiating monopole (1) is connected with described distributing point positive pole by described support metal post (2), described radiating monopole (1) is embedded in described filled media (3), described floor (4) is connected with distributing point negative pole, described radiating monopole (1) arranges described reflecting plate (5) behind, described floor (4) is connected with described reflecting plate (5), loads described lamped element (6) between described reflecting plate (5) and described radiating monopole (1).
2. the directed monopole antenna of one well logging radar according to claim 1, it is characterized in that: the shape of described radiating monopole (1) is fan-shaped, the front and back ratio of described monopole antenna radiant power can reach 5:1.
3. the directed monopole antenna of one well logging radar according to claim 1 and 2, is characterized in that: the shape of described support metal post (2) is cylindrical.
4. the directed monopole antenna of one well logging radar according to any one of claims 1 to 3, it is characterized in that: described floor (4) and described filled media (3) are cylindrical, and external diameter is identical, stronger dynamics can be born to make described monopole antenna.
5. the directed monopole antenna of one well logging radar according to any one of claims 1 to 3, it is characterized in that: described floor (4), described reflecting plate (5) and described filled media (3) are cylindrical, can bear stronger dynamics to make described monopole antenna.
6. the directed monopole antenna of one well logging radar according to claim 1 and 2, is characterized in that: described reflecting plate (5) is placed in the outside of described filled media (3).
7. the directed monopole antenna of a kind of well logging radar according to claim 1 or 5, is characterized in that: described support metal post (2) is also embedded in filled media (3).
8. the directed monopole antenna of one well logging radar according to claim 1, is characterized in that: the impedance of described antenna is 50 ± 2 Ω.
9. the directed monopole antenna of one well logging radar according to claim 1, is characterized in that: described filled media to be dielectric constant be 4 medium, described filled media can make described monopole antenna size be contracted to 1/2 when not using filled media.
10. a directional well logging radar system, described system comprises the directed monopole antenna of well logging radar as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738806.0A CN104393418A (en) | 2014-12-05 | 2014-12-05 | Well logging radar directional monopole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410738806.0A CN104393418A (en) | 2014-12-05 | 2014-12-05 | Well logging radar directional monopole antenna |
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| Publication Number | Publication Date |
|---|---|
| CN104393418A true CN104393418A (en) | 2015-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410738806.0A Pending CN104393418A (en) | 2014-12-05 | 2014-12-05 | Well logging radar directional monopole antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670714A (en) * | 2020-12-17 | 2021-04-16 | 山东大学 | Four-direction monopole directional antenna system and method for borehole radar detection |
| CN113708089A (en) * | 2021-08-17 | 2021-11-26 | 电子科技大学 | Directional antenna system for radar in well |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009143216A1 (en) * | 2008-05-23 | 2009-11-26 | Harris Corporation | Folded conical antenna and associated methods |
| CN201408843Y (en) * | 2009-05-19 | 2010-02-17 | 武汉大学 | Compact receiving antenna of portable high-frequency sea-detecting radar |
| CN102904024A (en) * | 2012-10-24 | 2013-01-30 | 武汉大学 | Double-frequency transmitting monopole antenna for portable high-frequency ground wave radar |
-
2014
- 2014-12-05 CN CN201410738806.0A patent/CN104393418A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009143216A1 (en) * | 2008-05-23 | 2009-11-26 | Harris Corporation | Folded conical antenna and associated methods |
| CN201408843Y (en) * | 2009-05-19 | 2010-02-17 | 武汉大学 | Compact receiving antenna of portable high-frequency sea-detecting radar |
| CN102904024A (en) * | 2012-10-24 | 2013-01-30 | 武汉大学 | Double-frequency transmitting monopole antenna for portable high-frequency ground wave radar |
Non-Patent Citations (1)
| Title |
|---|
| 梁洪艳: "石油钻孔收发天线设计及其电磁波传输特性研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670714A (en) * | 2020-12-17 | 2021-04-16 | 山东大学 | Four-direction monopole directional antenna system and method for borehole radar detection |
| CN113708089A (en) * | 2021-08-17 | 2021-11-26 | 电子科技大学 | Directional antenna system for radar in well |
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Application publication date: 20150304 |