JPH0567196B2 - - Google Patents
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- Publication number
- JPH0567196B2 JPH0567196B2 JP62203378A JP20337887A JPH0567196B2 JP H0567196 B2 JPH0567196 B2 JP H0567196B2 JP 62203378 A JP62203378 A JP 62203378A JP 20337887 A JP20337887 A JP 20337887A JP H0567196 B2 JPH0567196 B2 JP H0567196B2
- Authority
- JP
- Japan
- Prior art keywords
- transmitting
- receiving
- civil engineering
- front member
- detection device
- 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 - Fee Related
Links
Landscapes
- Radar Systems Or Details Thereof (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
この発明は、例えば推進機または掘削機等の土
木工事機械に付設される障害物探知装置に関し、
進行方向前方に存在する埋設物等の障害物を的確
に探知できるようにしたものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an obstacle detection device attached to a civil engineering machine such as a propulsion machine or an excavator.
It is designed to accurately detect obstacles such as buried objects that exist ahead in the direction of travel.
（従来の技術）
推進機または削機等の土木工事機械は、一の縦
抗から数十メートル乃至数百メートル先に設けら
れた他の縦抗に向けて、地表面を開削することな
く終止土中を進みながら通信線等を敷設するため
の管路を構築するために推進して行く機械であ
る。そして、周囲の土が柔らかい場合、その推進
先端部としては平坦なものが用いられ、当該推進
先端部が伸縮しながら周囲の土を押しのけて進ん
で行く。また、周囲の土が固い場合、その推進先
端部としては掘削歯を具備するものが用いられ、
当該推進先端部が前方の土を切り削して柔らかく
しながら推進して行く。(Prior art) Civil engineering machines such as propulsion machines or excavators can move from one shaft to another shaft located several tens to hundreds of meters ahead without excavating the ground surface. This is a machine that propels itself through the earth to construct conduits for laying communication lines, etc. If the surrounding soil is soft, a flat propelling tip is used, and the propelling tip expands and contracts while pushing aside the surrounding soil. In addition, if the surrounding soil is hard, a propelling tip equipped with digging teeth is used.
The propulsion tip cuts and softens the soil in front of it as it propels itself.
一方、進行方向前方に存在する埋設物等の障害
物を事前に探知することは、この埋設物並びに土
木工事機械の双方の損失を防止する上で重要な意
義を有している。このため、推進機または掘削機
等の土木工事機械における障害物探知装置として
は、電磁波を土中に送信し、障害物からの反射波
を受信して、これを探知するようにしたものが知
られている。 On the other hand, detecting obstacles such as buried objects in advance in the forward direction of travel has an important meaning in preventing loss of both the buried objects and the civil engineering equipment. For this reason, obstacle detection devices for civil engineering machines such as propulsion machines and excavators are designed to transmit electromagnetic waves into the soil, receive reflected waves from obstacles, and detect them. It is being
ところで、このような土木工事機械の先端部前
面板は、土を押広げあるいは掘削するために大き
な荷重がかかるので、高強度な鉄鋼材料が用いら
れている。このため、このような材料製の先端部
前面板の背面側に送信用および受信用のアンテナ
エレメントを装着しても、送信用アンテナエレメ
ントから送信された電磁波は鉄鋼材料製の先端部
前面板の内面側で全反射されて電磁波を土中へ送
信することはできない。 By the way, the front plate of the front end of such a civil engineering machine is made of high-strength steel material because a large load is applied to the front plate for spreading or excavating soil. Therefore, even if transmitting and receiving antenna elements are attached to the back side of the tip front plate made of such materials, the electromagnetic waves transmitted from the transmitting antenna element will be transmitted to the tip front plate made of steel. Electromagnetic waves cannot be transmitted into the soil because they are totally reflected on the inner surface.
このような点に対処した第１の従来例として、
機械先端部に４本のカツタースポークが備えられ
たシールド掘削機における障害物探知装置におい
て、カツタースポークによる送信電磁波の反射を
防ぐため、カツター旋回モータ軸に連結された回
転パルス発信器とカツタースポーク位置演算器と
が備えられ、カツタースポークによる非遮断時間
帯にのみ送信用電磁波を発射させるようにしたも
のがある（特開昭60−261892号公報）。 As a first conventional example that addresses these points,
In an obstacle detection device for a shield excavator equipped with four cutter spokes at the tip of the machine, in order to prevent the reflection of transmitted electromagnetic waves by the cutter spokes, a rotary pulse transmitter connected to the cutter rotation motor shaft and a cutter There is one that is equipped with a cutter spoke position calculator and is configured to emit transmitting electromagnetic waves only during non-blocking time periods by the cutter spoke (Japanese Patent Laid-Open No. 60-261892).
しかしながら、第１の従来例にあつては、複数
個のカツタースポークによる非遮断時間帯を検出
するための装置構成が複雑化し、また非遮断時間
帯にのみ受信された反射波により障害物を探知す
ることになるので、障害物を的確に探知すること
が難しいという問題点があつた。 However, in the first conventional example, the device configuration for detecting the non-blocking time period due to the plurality of cutter spokes is complicated, and the reflected waves received only during the non-blocking time period detect obstacles. There was a problem in that it was difficult to accurately detect obstacles.
また、障害物探知装置は、地上から地中の埋設
物の障害物を探知するようにした第２の従来例が
ある。この第２の従来例では、送信用アンテナか
ら空気中に発射される電磁波の波長として、電磁
波の到達距離を大にして探知性能を高めるために
3m〜50cm（周波数で約100MHz〜600MHzに相当）
程度のものが用いられている。そして、この帯域
の電磁波を送、受信するためのアンテナエレメン
トとしては、一辺が30〜40cmのものが用いられ
る。このような大きさのアンテナエレメントを土
木工事機械の先端部に装着できれば、地上からの
障害物探知装置と同程度の探知可能距離を有する
土木工事機械用障害物探知装置が実現できる。し
かしながら、上記のような大きさのアンテナエレ
メントを土木工事機械の先端部に装着すると、そ
の土木工事機械の種類によつてはアンテナエレメ
ントの占有面積が大きくなつて、装着が困難にな
る場合があつた。これを解決するために、アンテ
ナエレメントの寸法を単純に１／ｎ（ｎ＞１）に
小形化すると、適用できる波長は１／ｎになり周
波数がｎ倍となつて電磁波の到達距離が短かくな
り探知可能距離が低下してしまう。 Further, there is a second conventional example of an obstacle detection device that detects obstacles buried underground from the ground. In this second conventional example, the wavelength of the electromagnetic waves emitted into the air from the transmitting antenna is set in order to increase the reach distance of the electromagnetic waves and improve detection performance.
3m ~ 50cm (equivalent to approximately 100MHz ~ 600MHz in frequency)
A certain degree is used. An antenna element with a side of 30 to 40 cm is used for transmitting and receiving electromagnetic waves in this band. If an antenna element of such a size can be attached to the tip of a civil engineering machine, it is possible to realize an obstacle detection device for a civil engineering machine that has a detectable distance comparable to that of an obstacle detection device from the ground. However, if an antenna element of the above size is attached to the tip of a civil engineering machine, the area occupied by the antenna element may become large depending on the type of civil engineering machine, making attachment difficult. Ta. To solve this problem, simply reducing the size of the antenna element to 1/n (n>1) will reduce the applicable wavelength to 1/n, increase the frequency by n times, and shorten the reach of electromagnetic waves. This will reduce the detectable distance.
（発明が解決しようとする問題点）
従来の土木工事機械は、その前面部に鉄鋼材質
製の前面板が配設されていたため、この前面板の
背面側に送信用アンテナエレメントを装着して
も、送信用の電磁波が前面板の裏面側で全反射さ
れて、電磁波を土中へ送信することはできない。(Problem to be solved by the invention) Conventional civil engineering machines had a front plate made of steel on the front side, so even if a transmitting antenna element was attached to the back side of this front plate, , the electromagnetic waves for transmission are totally reflected on the back side of the front plate, making it impossible to transmit the electromagnetic waves into the ground.
また、第１の従来例では、複数個のカツタース
ポークによる非遮断時間帯を検出するための装置
構成が複雑化し、さらに非遮断時間帯にのみ受信
された反射波により障害物を探知することになる
ので、障害物を的確に探知することが難しいとい
う問題点があつた。 In addition, in the first conventional example, the device configuration for detecting the non-blocking time period due to the plurality of cutter spokes is complicated, and furthermore, it is difficult to detect obstacles using reflected waves received only during the non-blocking time period. Therefore, there was a problem that it was difficult to accurately detect obstacles.
さらに、地上からの障害物探知装置である第２
の従来例と同程度の探知可能距離を得るために
は、アンテナエレメントの寸法が比較的大きくな
つてしまうので、これを機械先端部に装着するこ
とは難しいという問題点があつた。 In addition, a second obstacle detection device from the ground is installed.
In order to obtain a detectable distance comparable to that of the conventional example, the size of the antenna element would have to be relatively large, so there was a problem in that it was difficult to attach it to the tip of the machine.
この発明では、上記事情に基づいてなされたも
ので、前面部材の機械的強度を損なうことなく進
行方向前方に存在する埋設物等の障害物を的確に
探知することのできる土木工事機械用障害物探知
装置を提供することを目的とする。 This invention has been made based on the above-mentioned circumstances, and is an obstacle for civil engineering machinery that can accurately detect obstacles such as buried objects that are present in the forward direction of movement without impairing the mechanical strength of the front member. The purpose is to provide a detection device.
［発明の構成］
（問題点を解決するための手段）
この発明は、上記問題点を解決するために、土
中を推進ないしは掘削する土木工事機械の先端部
全面に装着され当該土の比誘電率と同程度の比誘
電率を有すると共に所要の強度を有する非金属材
質製の前面部材と、該前面部材を通して障害物探
知用の電波を送波および受波する送信用および受
信用のアンテナと、該送信用および受信用のアン
テナとの間で送信電力の給電および障害物からの
反射電波に基づく受信電力の受電を行なう送信用
および受信用の回路とを有することを要旨とす
る。[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, this invention is provided on the entire front end of a civil engineering machine that propels or excavates underground, and is designed to reduce the relative dielectric potential of the soil. a front member made of a non-metallic material that has a dielectric constant comparable to the dielectric constant and a required strength, and a transmitting and receiving antenna that transmits and receives radio waves for detecting obstacles through the front member. The gist of the present invention is to have transmitting and receiving circuits that feed transmitting power between the transmitting and receiving antennas and receive received power based on radio waves reflected from obstacles.
（作用）
一般に、電磁波は比誘電率の相異する物質の境
界部で反射する。(Function) Generally, electromagnetic waves are reflected at the boundary between materials with different dielectric constants.
土木工事機械の先端部全面に装着されて土と接
する前面部材は、非金属材質で作製されているの
で、その比誘電率を土の比誘電率とほぼ近い値と
することができる。而して送信用アンテナから発
射された電磁波は、前面部材を効率よく通過して
土木工事機械の進行方向前方の土中に送信され、
また障害物から反射電波も上記と同様に前面部材
を効率よく通過して受信アンテナに受波される。
したがつて進行方向前方に存在する埋設物等の障
害物が的確に探知される。 Since the front member attached to the entire front end of the civil engineering machine and in contact with the soil is made of a non-metallic material, its relative permittivity can be set to a value approximately close to that of the soil. The electromagnetic waves emitted from the transmitting antenna efficiently pass through the front member and are transmitted into the soil in front of the civil engineering machine in the direction of movement.
Similarly to the above, reflected radio waves from obstacles also efficiently pass through the front member and are received by the receiving antenna.
Therefore, obstacles such as buried objects that exist ahead in the direction of travel can be accurately detected.
（実施例）
以下、この発明の実施例を図面に基づいて説明
する。(Example) Hereinafter, an example of the present invention will be described based on the drawings.
第１図ないし第５図は、この発明を推進機に適
用した第１実施例を示す図である。 1 to 5 are diagrams showing a first embodiment in which the present invention is applied to a propulsion device.
まず、土木工事機械用障害物探知装置の構成を
説明すると、土木工事機械の先端部１には、前面
部材としてのセラミツクス製の前面板２が装着さ
れ、前面板２の背面に送信用アンテナエレメント
３および受信用アンテナエレメント４が取付けら
れている。前面板２は、鉄鋼材質製のものと同程
度の強度とするため、鉄鋼材質製のものよりも適
宜に厚く形成されている。使用時に前面板２の外
面側は、土（比誘電率＝２〜80）と接触する。一
般に電磁波は、比誘電率の相異する物質の境界部
で反射が生じるが、前面板２の材質を上記のよう
にセラミツクスとすることにより前面板２の比誘
電率と同程度の値とすることができて、その接触
面での電磁波の反射量が極めて小さい値に抑えら
れる。このような比誘電率を有するセラミツクス
としては、アルミナ系、ベリリア系、バリウム系
等多数のものが存在している。なお、前面板２の
材質としては、上記のセラミツクスの他に、例え
ば通常の塩化ビニールの比誘電率は３〜10程度の
値であるので、プラスチツク、FRP（強化プラス
チツク）を用いることもでき、さらにはカーボン
を所定の割合で分散させたゴムを用いることもで
きる。 First, to explain the configuration of the obstacle detection device for civil engineering equipment, a front plate 2 made of ceramics as a front member is attached to the tip end 1 of the civil engineering machine, and a transmitting antenna element is attached to the back of the front plate 2. 3 and a receiving antenna element 4 are attached. The front plate 2 is appropriately thicker than that made of steel in order to have the same strength as that made of steel. During use, the outer surface side of the front plate 2 comes into contact with soil (relative permittivity=2 to 80). Generally, electromagnetic waves are reflected at the boundary between materials with different dielectric constants, but by using ceramics as the material for the front plate 2 as described above, the dielectric constant can be made to be approximately the same as the dielectric constant of the front plate 2. This allows the amount of electromagnetic waves reflected on the contact surface to be suppressed to an extremely small value. There are many types of ceramics having such a dielectric constant, such as alumina-based, beryllia-based, and barium-based ceramics. In addition to the above-mentioned ceramics, the material for the front plate 2 may also be plastic or FRP (reinforced plastic), since the dielectric constant of ordinary vinyl chloride is about 3 to 10. Furthermore, rubber in which carbon is dispersed in a predetermined proportion can also be used.
また、前面板２と適宜の間隔をおいた先端部１
内には、前面板２と平行するように取付板５が固
定され、この取付板５の裏面側に送信回路６およ
び受信回路７が取付けられている。送信回路６は
コードで送信用アンテナエレメント３に接続さ
れ、受信回７はコード８で受信用アンテナエレメ
ント４に接続されている。送信用および受信用ア
ンテナエレメント３，４と取付板５との間には、
電波吸収体９が配設され、また送信回路６と受信
回路７との間には送受シールド１１が設けられて
いる。 In addition, the front plate 2 and the tip part 1 with an appropriate interval are provided.
A mounting plate 5 is fixed inside so as to be parallel to the front plate 2, and a transmitting circuit 6 and a receiving circuit 7 are mounted on the back side of this mounting plate 5. The transmitting circuit 6 is connected to the transmitting antenna element 3 by a cord, and the receiving circuit 7 is connected to the receiving antenna element 4 by a cord 8. Between the transmitting and receiving antenna elements 3, 4 and the mounting plate 5,
A radio wave absorber 9 is provided, and a transmitting/receiving shield 11 is provided between the transmitting circuit 6 and the receiving circuit 7.
送信回路６と受信回路７とは、さらにコネクタ
１２およびケーブル１３を介して制御処理部１４
に接続されている。制御処理部１４は土木工事機
械の推進制御機能を有するとともに、障害物１６
からの反射波形を表示するための表示部１５等が
備えられている。 The transmitting circuit 6 and the receiving circuit 7 are further connected to a control processing unit 14 via a connector 12 and a cable 13.
It is connected to the. The control processing unit 14 has a propulsion control function for the civil engineering machine, and also
A display section 15 and the like for displaying a reflected waveform from the oscilloscope is provided.
この実施例の土木工事機械用障害物探知装置
は、上述のように構成されているので、送信回路
６からの送信電力の給電により、送信用アンテナ
エレメント３から電磁波である高周波のパルスが
発射されると、その電磁波は、前面板２およびそ
の外面部と土との接触面を効率よく通過して先端
部１の進行方向前方の土中に送信される。そし
て、進行方向前方の土中に埋設物等の障害物１６
が存在すると、その反射電波は、前面板２の外面
と土との接触面および前面板２を上記と逆方向に
効率よく通過して受信用アンテナエレメント４に
受波される。 Since the obstacle detection device for civil engineering machinery of this embodiment is configured as described above, high-frequency pulses, which are electromagnetic waves, are emitted from the transmitting antenna element 3 by feeding the transmitting power from the transmitting circuit 6. Then, the electromagnetic waves efficiently pass through the front plate 2 and the contact surface between the front plate 2 and its outer surface and the soil, and are transmitted into the soil in front of the tip portion 1 in the direction of movement. Obstacles 16 such as objects buried in the ground ahead in the direction of travel
If there is, the reflected radio wave efficiently passes through the contact surface between the outer surface of the front plate 2 and the soil and the front plate 2 in the opposite direction to that described above, and is received by the receiving antenna element 4.
このようにして受波された反射電波は、受信回
路７を介して制御処理部１４に送られ、その表示
部１５に波形が表示されて障害物１６の存在が的
確に探知される。第５図は、先端１の前方ほぼ
1mの土中に埋設された75mmφ管を障害物１６と
して探知した反射電波の波形例を示すものであ
る。同波形図中、P1は送信用アンテナエレメン
ト３から受信用アンテナエレメント４へ直接回り
込んだ電磁波のピークを示し、P2は障害物１６
である75mmφからの反射電波によるピークを示し
ている。このピーク信号P2から障害物１６が探
知される。 The reflected radio waves received in this way are sent to the control processing unit 14 via the receiving circuit 7, and the waveform is displayed on the display unit 15 to accurately detect the presence of the obstacle 16. Figure 5 shows approximately the front of tip 1.
This shows an example of the waveform of reflected radio waves when a 75 mmφ pipe buried in 1 m of soil was detected as an obstacle 16. In the same waveform diagram, P 1 indicates the peak of the electromagnetic wave that has directly passed from the transmitting antenna element 3 to the receiving antenna element 4, and P 2 indicates the peak of the electromagnetic wave that has passed directly from the transmitting antenna element 3 to the receiving antenna element 4.
It shows the peak due to reflected radio waves from 75mmφ. Obstacle 16 is detected from this peak signal P2 .
そして、このような障害物探知作用において、
電波吸収体９により、送信用アンテナエレメント
３から発射された電磁波および前面板２の外面部
で僅かに反射された電磁波が送信回路６および受
信回路７にノイズとして入るのが防止される。 And, in this kind of obstacle detection action,
The radio wave absorber 9 prevents electromagnetic waves emitted from the transmitting antenna element 3 and electromagnetic waves slightly reflected from the outer surface of the front plate 2 from entering the transmitting circuit 6 and the receiving circuit 7 as noise.
次に、第６図ないし第８図には、この発明の第
２実施例を示す。なお、第６図ないし第８図およ
び後述の第９図ないし第１１図において前記第１
図ないし第４図における部材および部位等と同一
ないし均等のものは、前記と同一符号を以つて示
し、重複した説明を省略する。 Next, FIGS. 6 to 8 show a second embodiment of the present invention. In addition, in FIGS. 6 to 8 and later-described FIGS. 9 to 11, the first
Components, parts, etc. that are the same as or equivalent to those in the figures through FIG.
この実施例では、先端部１における非金属材質
製の前面部材が、セラミツクス等からなる前部前
面板２ａと後部前面板２ｂとの２枚で構成され、
この２枚の板体２ａ，２ｂの間に送信用アンテナ
エレメント３および受信用アンテナエレメント４
挟持されて、両アンテナエレメント３，４は、恰
も非金属材質製の前面部材中に埋設されている。 In this embodiment, the front member made of a non-metallic material at the tip portion 1 is composed of two pieces, a front front plate 2a and a rear front plate 2b made of ceramics or the like.
A transmitting antenna element 3 and a receiving antenna element 4 are provided between these two plates 2a and 2b.
Both antenna elements 3 and 4 are sandwiched and embedded in a front member made of a non-metallic material.
一般に、比誘電率εのセラミツクス等の中では
電磁波の速度は空気中の１／ε1/2となる。したが
つて送信用および受信用アンテナエレメント３，
４を１／ｎに小形化しても、これをｎ＝ε1/2のセ
ラミツクス等の中に設ければ、電磁波の周波数は
不変となつて、探知可能距離の低下が防止され
る。 Generally, the speed of electromagnetic waves in ceramics and the like having a dielectric constant of ε is 1/ε 1/2 of that in air. Therefore, the transmitting and receiving antenna elements 3,
Even if 4 is miniaturized to 1/n, if it is installed in ceramics or the like with n=ε 1/2 , the frequency of the electromagnetic waves remains unchanged, and the detectable distance is prevented from decreasing.
なお、上述の各実施例では、送信用および受信
用のアンテナエレメントを各別に設けたが、両者
を１つのアンテナエレメントで兼用するととも
に、送受信切替部を設けることによつても各実施
例のものと同様の作用を得ることができる。 In each of the above-mentioned embodiments, antenna elements for transmission and reception were provided separately, but by using a single antenna element for both purposes and by providing a transmission/reception switching section, the antenna elements of each embodiment can be improved. A similar effect can be obtained.
［発明の効果］
以上説明したように、この発明によれば、土木
工事機械の先端部全面に装着され土と接触する前
面部材を所要の強度を有する非金属材質製とした
ので、その比誘電率を土の比誘電率とほぼ近い値
とすることができ、送、受信用の電磁波を、前面
部材およびその前面部材の外面部と土との接触面
の部分を効率よく通過させることができて、前面
部材の機械的強度を損なうことなく進行方向前方
に存在する埋設物等の障害物を的確に探知するこ
とができるという効果が得られる。[Effects of the Invention] As explained above, according to the present invention, the front member that is attached to the entire front end of the civil engineering machine and comes into contact with the soil is made of a non-metallic material having the required strength, so that its relative dielectric The dielectric constant can be set to a value almost close to the relative permittivity of soil, and electromagnetic waves for transmission and reception can be efficiently passed through the front member and the contact surface between the outer surface of the front member and the soil. As a result, it is possible to accurately detect obstacles such as buried objects located ahead in the direction of travel without impairing the mechanical strength of the front member.
また、各実施例は、それぞれ上記共通の効果に
加えて、さらに以下のような効果が得られる。 In addition to the above-mentioned common effects, each of the embodiments also provides the following effects.
送信用および受信用のアンテナを前面部材の背
面に取付け、その送信用および受信用のアンテナ
と送信用および受信用の回路との間に電波吸収体
を配設した実施例によよれば、送信用アンテナか
ら発射された電磁波および前面部材の外面部から
僅かに反射された電磁波が電波吸収体で吸収され
て送信用および受信用の回路にノイズとして入る
のが防止されるので、障害物が一層的確に探知さ
れる。 According to an embodiment in which transmitting and receiving antennas are attached to the back of the front member, and a radio wave absorber is arranged between the transmitting and receiving antennas and the transmitting and receiving circuits. The electromagnetic waves emitted from the reliable antenna and the electromagnetic waves slightly reflected from the outer surface of the front member are absorbed by the radio wave absorber and are prevented from entering the transmitting and receiving circuits as noise. Accurately detected.
さらに、送信用および受信用のアンテナを、非
金属材質製の前面部材中に埋設した実施例によれ
ば、送、受信用のアンテナを小形化しても、適用
できる周波数をほぼ不変とすることができて、障
害物の探知可能距離の低下を防止することができ
る。 Furthermore, according to the embodiment in which the transmitting and receiving antennas are embedded in the front member made of non-metallic material, the applicable frequencies can be kept almost unchanged even if the transmitting and receiving antennas are downsized. This can prevent the detectable distance of obstacles from decreasing.
第１図ないし第５図はこの発明に係る土木工事
機械用障害物探知装置の第１実施例を示すもの
で、第１図は装置全体の構成図、第２図は土木工
事機械先端部の縦断面図、第３図は第２図のA1
−A1線断面図、第４図は第２図のB1−B1線断面
図、第５図は障害物からの反射電波の波形例を示
す波形図、第６図ないし第８図はこの発明の第２
実施例を示すもので、第６図は機械先端部の縦断
面図、第７図は第６図のA2−A2線断面図、第８
図は第６図のB2−B2線断面図である。
１……先端部、２……前面板（前面部材）、２
ａ……前部前面板、２ｂ……前部前面板とともに
前面部材を構成する後部前面板、３…送信用アン
テナエレメント、４……受信用アンテナエレメン
ト、６……送信回路、７……受信回路、９……電
波吸収体、１４……制御処理部。
1 to 5 show a first embodiment of the obstacle detection device for civil engineering machinery according to the present invention. FIG. 1 is a block diagram of the entire device, and FIG. Longitudinal cross-sectional view, Figure 3 is A 1 of Figure 2
-A 1 line sectional view, Figure 4 is a B 1 -B 1 line sectional view of Figure 2, Figure 5 is a waveform diagram showing waveform examples of reflected radio waves from obstacles, Figures 6 to 8 are The second part of this invention
Fig. 6 is a longitudinal sectional view of the tip of the machine, Fig. 7 is a sectional view taken along line A 2 - A 2 in Fig. 6, and Fig. 8 is a sectional view of the machine.
The figure is a sectional view taken along line B 2 -B 2 in FIG. 6. 1...Tip part, 2...Front plate (front member), 2
a...Front front plate, 2b...Rear front plate forming a front member together with the front front plate, 3...Antenna element for transmission, 4...Antenna element for reception, 6...Transmission circuit, 7...Reception Circuit, 9... Radio wave absorber, 14... Control processing section.
Claims (1)
端部全面に装着され当該土の比誘電率と同程度の
比誘電率を有すると共に所要の強度を有する非金
属材質製の前面部材と、該前面部材を通して障害
物探知用の電波を送波および受波する送信用およ
び受信用のアンテナと、該送信用および受信用の
アンテナとの間で送信電力の給電および障害物か
らの反射電波に基づく受信電力の受電を行なう送
信用および受信用の回路とを有することを特徴と
する土木工事機械用障害物探知装置。 ２ 前記送信用および受信用のアンテナは、前記
前面部材の背面に取付けられ、当該送信用および
受信用のアンテナと前記送信用および受信用の回
路との間には電波吸収体を配設したことを特徴と
する特許請求の範囲第１項に記載の土木工事機械
用障害物探知装置。 ３ 前記前面部材の材質は、比誘電率が２〜80の
セラミツクス、ゴム、プラスチツク、強化プラス
チツクの何れか又は複合体であることを特徴とす
る特許請求の範囲第１項または第２項または第３
項に記載の土木工事機械用障害物探知装置。[Scope of Claims] 1. A device made of a non-metallic material that is attached to the entire front end of a civil engineering machine that propels or excavates underground, and has a dielectric constant comparable to that of the soil and has the required strength. A front member, a transmitting and receiving antenna that transmits and receives radio waves for detecting obstacles through the front member, and a transmitting and receiving antenna that transmits and receives transmitting power and removes obstacles from the front member. 1. An obstacle detection device for a civil engineering machine, comprising a transmitting circuit and a receiving circuit for receiving received power based on reflected radio waves. 2. The transmitting and receiving antennas are attached to the back surface of the front member, and a radio wave absorber is provided between the transmitting and receiving antennas and the transmitting and receiving circuits. An obstacle detection device for civil engineering machinery according to claim 1, characterized in that: 3. The material of the front member is ceramics, rubber, plastic, reinforced plastic, or a composite material having a dielectric constant of 2 to 80. 3
Obstacle detection device for civil engineering machinery as described in 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62203378A JPS6446684A (en) | 1987-08-18 | 1987-08-18 | Obstacle detection device for civil working machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62203378A JPS6446684A (en) | 1987-08-18 | 1987-08-18 | Obstacle detection device for civil working machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6446684A JPS6446684A (en) | 1989-02-21 |
| JPH0567196B2 true JPH0567196B2 (en) | 1993-09-24 |
Family
ID=16473044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62203378A Granted JPS6446684A (en) | 1987-08-18 | 1987-08-18 | Obstacle detection device for civil working machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6446684A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0481679A (en) * | 1990-07-25 | 1992-03-16 | Japan Radio Co Ltd | Apparatus for measuring thickness of heat-resisting brick of furnace |
| US9052394B2 (en) | 2009-10-06 | 2015-06-09 | Louisiana Tech University Research Foundation | Method and apparatus for detecting buried objects |
| JP5585456B2 (en) | 2011-01-06 | 2014-09-10 | 株式会社デンソー | Heat exchanger and manufacturing method thereof |
| KR101639339B1 (en) * | 2015-06-11 | 2016-07-13 | 한국지질자원연구원 | Undergroud exploration radar device using the propertties of the mediators |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0439351Y2 (en) * | 1985-07-12 | 1992-09-14 | ||
| JPS6277294U (en) * | 1985-10-31 | 1987-05-18 |
-
1987
- 1987-08-18 JP JP62203378A patent/JPS6446684A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6446684A (en) | 1989-02-21 |
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