JPH0214801B2 - - Google Patents
Info
- Publication number
- JPH0214801B2 JPH0214801B2 JP57130292A JP13029282A JPH0214801B2 JP H0214801 B2 JPH0214801 B2 JP H0214801B2 JP 57130292 A JP57130292 A JP 57130292A JP 13029282 A JP13029282 A JP 13029282A JP H0214801 B2 JPH0214801 B2 JP H0214801B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- dielectric material
- ground surface
- bag
- underground
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
- H01Q19/09—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens wherein the primary active element is coated with or embedded in a dielectric or magnetic material
Landscapes
- Aerials With Secondary Devices (AREA)
- Radar Systems Or Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この考案は電磁波パルスを地中に送受波して地
下埋設物を探知するアンテナ装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an antenna device for detecting underground objects by transmitting and receiving electromagnetic wave pulses underground.
この種のアンテナ装置として、ダイポールアン
テナを地表面上に移動させて探知するものが、計
測自動制御学会発行「計測と制御」VOL.20、No.
８（昭和56年８月）、特公昭55−44916などにより
開示され、また、大地に対して垂直なホーンアン
テナを用いるものが特開昭58−35478などにより
開示されている。
This type of antenna device, which detects by moving a dipole antenna above the ground surface, is described in "Measurement and Control", Vol. 20, No. 20, published by the Society of Instrument and Control Engineers.
8 (August 1981), Japanese Patent Publication No. 55-44916, and others using a horn antenna perpendicular to the ground have been disclosed in Japanese Patent Application Laid-open No. 58-35478.
そして、後者のホーンアンテナのものにおい
て、ホーン部分の入口と出口とを高周波絶縁板で
閉じ、この閉じた空間内に乾燥砂などの地中の媒
体と同等の誘電率を有する粉粒状誘電体を設け
て、アンテナの放射面と大地とのインピーダンス
整合を容易にする手段が開示されている。 In the latter horn antenna, the inlet and outlet of the horn part are closed with a high-frequency insulating plate, and a powdery dielectric material having a dielectric constant equivalent to that of an underground medium such as dry sand is placed inside this closed space. Means are disclosed for providing an antenna to facilitate impedance matching between the antenna's radiating surface and ground.
上記の整合手段では、地表面と高周波絶縁板と
が密着状に配置できる場合には、理想的に整合す
るが、アンテナ装置を移動して用いる場合など、
実際には、探知現場の地表面に凹凸があり、高周
波絶縁板と地表面との間に空〓が生じてしまうた
め、この空〓の存在によつてインピーダンス整合
が崩されてしまうという不都合が生ずる。
The above matching means ideally matches when the ground surface and the high frequency insulating plate can be placed in close contact with each other, but when the antenna device is moved and used, etc.
In reality, the ground surface at the detection site is uneven, creating a void between the high-frequency insulating plate and the ground surface, which causes the inconvenience of disrupting impedance matching. arise.
このため、こうした不都合のないアンテナ装置
の提供が期待されているという課題がある。 Therefore, there is a problem in that it is expected to provide an antenna device that does not have these disadvantages.
この発明は、上記のような地表面から地中の地
下埋設物を探知するための電磁波パルスを送受波
するアンテナの送受波部分に、地中の媒体と同等
の誘電率を有する粉粒状誘電体を設けて、送受波
能率を向上させるようにした地下埋設物探知用ア
ンテナ装置において、
地表面に対して間隔を設けて平行方向に配置し
たダイポールアンテナと、
耐摩耗性をもつ柔軟質の誘電材で形成され、地
表面に接するとともにアンテナ全体を包む袋体
と、
袋体の内側における少なくとも上記の間隔の部
分に充填された上記の粉粒状誘電体と
を具備するアンテナ装置を提供することにより、
上記の課題を解決し得るようにしたものである。
This invention provides a particulate dielectric material having a dielectric constant equivalent to that of an underground medium in the wave transmitting/receiving part of an antenna that transmits and receives electromagnetic wave pulses for detecting underground objects from the ground surface. The antenna system for detecting underground objects is equipped with a dipole antenna arranged parallel to the ground surface at intervals, and a wear-resistant flexible dielectric material. By providing an antenna device comprising: a bag body formed of a material that is in contact with the ground surface and envelops the entire antenna; and the above-mentioned granular dielectric material filled in at least a portion of the above-mentioned interval inside the bag body.
This system is designed to solve the above problems.
以下、図によつて、実施例を説明する。 Examples will be described below with reference to figures.
図において、アンテナ１は、地表面６から地中
の地下埋設物を探知するための電磁波パルスを送
受波するアンテナであつて、図のように、地表面
６に平行方向のダイポールアンテナを地表面６に
対して間隔ａを設けて配置したものであり、表面
が絶縁処理さており、給電線６によつて所要の機
器に接続されている。 In the figure, antenna 1 is an antenna that transmits and receives electromagnetic wave pulses for detecting underground objects from the ground surface 6. 6, the surface is insulated, and the power supply line 6 connects to necessary equipment.
袋体２は地表面６に接するとともにアンテナ１
全体を包むようにした形状の袋で、耐摩耗性をも
つ柔軟質の誘電材で形成してあり、この誘電材と
しては、例えば、布入りの塩化ビニール、塩化ビ
ニリデンシートまたはナイロンなどの誘電率が大
きく耐摩耗性の材料を選定する。 The bag body 2 is in contact with the ground surface 6 and the antenna 1
The bag is shaped to envelop the entire body and is made of a wear-resistant, flexible dielectric material that has a dielectric constant such as cloth-filled vinyl chloride, vinylidene chloride sheet, or nylon. Select materials that are highly wear-resistant.
この袋２の内部に充填された誘電体材３は、地
中の被探知物の周囲の媒体と同等の誘電率を有す
るもので、土・砂・粘土などまたはステアタイ
ト、アルミナ、長石質、マイカレツクスなどの誘
電体材の粉末または粒体などを適当に混合したも
の、またはこれらにグリセリン、トランス油など
の粘性体を混合したもの、または既知場所の土壌
そのもの（これらの誘電体材を、この発明におい
て、粉粒状誘電体という）を用いる。 The dielectric material 3 filled inside the bag 2 has a dielectric constant equivalent to the medium surrounding the object to be detected underground, and is made of soil, sand, clay, steatite, alumina, feldspar, etc. An appropriate mixture of powder or granules of dielectric material such as micarex, or a mixture of these with a viscous substance such as glycerin or transformer oil, or the soil itself at a known location (these dielectric materials, In this invention, a powder-like dielectric material is used.
なお、この誘電体材３は、土壌の誘電率が、一
般に、その成分や粒度分布、空〓率、含水量など
によつて相違することや、地表面とのなじみ性を
考慮して選定する。 The dielectric material 3 is selected taking into consideration the fact that the dielectric constant of soil generally differs depending on its components, particle size distribution, porosity, water content, etc., and its compatibility with the ground surface. .
また、遮蔽体４はアンテナ１の後方および周囲
を覆う碗状の遮蔽体であり、必要により、この遮
蔽体４と袋体２との間に電波吸収体の層を設ける
こともある。 Further, the shielding body 4 is a bowl-shaped shielding body that covers behind and around the antenna 1, and a layer of a radio wave absorber may be provided between the shielding body 4 and the bag body 2, if necessary.
この発明によれば、上記のように、袋体２が耐
摩耗性をもつ柔軟質の誘電材で形成してあるの
で、地表面６の上を引きずつて移動しても袋体２
が破れることなく地表面６の凹凸に従つて変形す
るので、袋体２の下面を地表面６に対して常に密
着状体に保つことができ、また、誘電体材３が粉
粒状誘電体になつているため、袋体２の変形にと
もなつて誘電体材３も変形して、少なくとも間〓
ａの部分には常に誘電体材３が空〓を生ずること
なく介在させられるようになる。
According to this invention, as described above, since the bag body 2 is made of a wear-resistant, flexible dielectric material, even if the bag body 2 is dragged along the ground surface 6, the bag body 2
Since the bag deforms according to the irregularities of the ground surface 6 without tearing, the lower surface of the bag body 2 can be kept in close contact with the ground surface 6 at all times, and the dielectric material 3 can be transformed into a powdery dielectric material. Therefore, as the bag body 2 deforms, the dielectric material 3 also deforms, and at least for a short period of time.
The dielectric material 3 can always be interposed in the portion a without creating any voids.
したがつて、地表面６の凹凸やアンテナ装置の
移動によつてインピーダンス整合が崩されること
がなくなり、さらに、誘電体材３がアンテナ１全
体にわたり分布状に容量成分を形成するため、同
一周波数に対してアンテナ１の大きさを小さくで
き、アンテナ装置の小型化を可能にして、狭い路
地などに持ち込んで使用することもできるように
なるものを、袋体３を設けて粉粒状誘電体を充填
するだけのごく簡単な構成を付加するだけで、安
価に提供し得るなどの特長がある。 Therefore, impedance matching will not be disrupted due to irregularities in the ground surface 6 or movement of the antenna device, and furthermore, since the dielectric material 3 forms a capacitance component distributed over the entire antenna 1, the same frequency On the other hand, the size of the antenna 1 can be reduced, the size of the antenna device can be reduced, and the antenna device can be brought into narrow alleys and used. It has the advantage of being able to be provided at a low cost by simply adding a very simple configuration.
第１図は実施例の断面図である。
１……アンテナ、２……袋体、３……誘電体
材、４……遮蔽体、５……給電線、６……地表
面。
FIG. 1 is a sectional view of the embodiment. 1... antenna, 2... bag, 3... dielectric material, 4... shielding body, 5... power supply line, 6... ground surface.
Claims (1)
の電磁波パルスを送受波するダイポールアンテナ
の送受波部分に、地中の媒体と同等の誘電率を有
する粉粒状誘電体を設けて、送受波能率を向上さ
せるようにした地下埋設物探知用アンテナ装置で
あつて、 ａ 前記地表面に対して間隔を設けて平行方向に
配置した前記ダイポールアンテナと、 ｂ 耐摩耗性をもつ柔軟質の誘電材で形成され、
前記地表面に接するとともに前記アンテナ全体
を包む袋体と、 ｃ 前記袋体における少なくとも前記間隔の部分
に充填された前記粉粒状誘電体と を具備することを特徴とする装置。 ２ 特許請求の範囲第１項記載の装置であつて、
前記粉粒状誘電体として探知場所の土壌そのもの
を用いたことを特徴とする装置。[Scope of Claims] 1. A granular dielectric material having a dielectric constant equivalent to that of the underground medium is used in the wave transmitting/receiving portion of a dipole antenna that transmits and receives electromagnetic wave pulses from the ground surface to detect underground objects. An antenna device for detecting underground buried objects that improves wave transmission and reception efficiency by providing: a) the dipole antenna arranged parallel to the ground surface at intervals; and b) having wear resistance. Made of flexible dielectric material with
A device comprising: a bag that is in contact with the ground surface and that surrounds the entire antenna; c. the powdery dielectric that is filled in at least a portion of the bag at the distance. 2. The device according to claim 1,
A device characterized in that the soil itself at the detection location is used as the powdery dielectric material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57130292A JPS5922402A (en) | 1982-07-28 | 1982-07-28 | Antenna for searching underground object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57130292A JPS5922402A (en) | 1982-07-28 | 1982-07-28 | Antenna for searching underground object |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5922402A JPS5922402A (en) | 1984-02-04 |
| JPH0214801B2 true JPH0214801B2 (en) | 1990-04-10 |
Family
ID=15030821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57130292A Granted JPS5922402A (en) | 1982-07-28 | 1982-07-28 | Antenna for searching underground object |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5922402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013506859A (en) * | 2009-10-06 | 2013-02-28 | ルイジアナ テック ユニヴァーシティ リサーチ ファンデーション | Method and apparatus for detecting buried objects |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8426245D0 (en) * | 1984-10-17 | 1984-11-21 | British Gas Corp | Microwave reflection survey equipment |
| GB8426246D0 (en) * | 1984-10-17 | 1984-11-21 | British Gas Corp | Microwave reflection survey equipment |
| WO2014092644A1 (en) * | 2012-12-14 | 2014-06-19 | Decod Science & Technology Pte Ltd | Antenna system for ultra-wideband radar applications |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5835478A (en) * | 1981-08-27 | 1983-03-02 | Sofuaade:Kk | Locating device for underground structure by radar system |
-
1982
- 1982-07-28 JP JP57130292A patent/JPS5922402A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013506859A (en) * | 2009-10-06 | 2013-02-28 | ルイジアナ テック ユニヴァーシティ リサーチ ファンデーション | Method and apparatus for detecting buried objects |
| US9052394B2 (en) | 2009-10-06 | 2015-06-09 | Louisiana Tech University Research Foundation | Method and apparatus for detecting buried objects |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5922402A (en) | 1984-02-04 |
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