JPH087264B2 - Signs for detection systems - Google Patents
Signs for detection systemsInfo
- Publication number
- JPH087264B2 JPH087264B2 JP62193294A JP19329487A JPH087264B2 JP H087264 B2 JPH087264 B2 JP H087264B2 JP 62193294 A JP62193294 A JP 62193294A JP 19329487 A JP19329487 A JP 19329487A JP H087264 B2 JPH087264 B2 JP H087264B2
- Authority
- JP
- Japan
- Prior art keywords
- marker
- coil
- loop
- loop coil
- loop coils
- 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
- Geophysics And Detection Of Objects (AREA)
- Radar Systems Or Details Thereof (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、探知しようとする物（被探知物）の設置時
にその設置個所近傍に予め標識体を敷設しておき、後
日、外部からこの標識体を検知することにより被探知物
の存在位置を探知するようにしたシステムにおいて使用
される上記標識体の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention lays a marker in the vicinity of the place where an object to be detected (object to be detected) is installed in advance, and the signboard is installed from outside at a later date. The present invention relates to the structure of the above-mentioned marker used in a system for detecting the existing position of an object to be detected by detecting the marker.
上記探知システムは、例えば既設のガス管、水道管、
ケーブル管等の管路のように地中埋設物等の存在位置の
探知に使用され、標識体はこれら地中埋設物等の敷設時
にその近傍に予め埋設される。The detection system is, for example, an existing gas pipe, water pipe,
It is used for detecting the location of underground buried objects such as conduits such as cable pipes, and the marker is buried in the vicinity of these underground buried objects when they are laid.
（従来の技術） 例えば、地中埋設物のような被探知物の近傍にLC共振
回路で構成された標識体（以下、マーカーという。）を
予め設置しておき、後日、外部から上記LC共振回路の共
振周波数成分を有する探知用信号を送出してこのLC共振
回路の応動（探知用信号の吸収又は共振信号の放出等）
を検知し、上記被探知物の存在位置を既知するシステム
が公知である。(Prior Art) For example, a marker (hereinafter referred to as a marker) composed of an LC resonance circuit is installed in the vicinity of an object to be detected such as a buried object, and the LC resonance is externally applied at a later date. The detection signal having the resonance frequency component of the circuit is sent to respond to this LC resonance circuit (absorption of the detection signal or emission of the resonance signal)
There is known a system for detecting the position of the detected object and knowing the existing position of the detected object.
かかるシステムに使用されるマーカーの共振回路のイ
ンダクタンスを構成する素子としては、通常はループコ
イルが使用される。このループコイルは、例えば米国特
許第4334227号公報に開示されているように、１方向の
みに巻回されて構成され、敷設される方向はそのループ
コイルが作る平面（ループ面）をサーチコイル（検知器
本体に付属するループコイルで、探知用信号を放出し、
埋設物等の探知の際に地面に平行に移動（走査）させる
コイル）が作る平面と平行になるように設定される。A loop coil is usually used as an element constituting the inductance of the resonance circuit of the marker used in such a system. As disclosed in, for example, U.S. Pat. No. 4,334,227, this loop coil is constructed by being wound in only one direction, and the plane in which the loop coil is laid (loop surface) is a search coil ( A loop coil attached to the detector body emits a detection signal,
It is set so as to be parallel to a plane created by a coil that moves (scans) in parallel with the ground when detecting an embedded object or the like.
（発明が解決しようとする問題点） 上記従来のマーカーによると、マーカーの埋設姿勢が
傾斜すると、マーカーのループコイルと探知器のサーチ
コイルとの間の交差磁束量が少なくなって探知レベルが
低下し、極端な場合には、つまりマーカーのループコイ
ルがサーチコイルと直交する姿勢となったときには、マ
ーカーからの信号が探知できず探知不能となる。(Problems to be Solved by the Invention) According to the above-mentioned conventional marker, when the embedded posture of the marker is inclined, the amount of cross magnetic flux between the loop coil of the marker and the search coil of the detector is reduced and the detection level is lowered. However, in an extreme case, that is, when the loop coil of the marker is in a posture orthogonal to the search coil, the signal from the marker cannot be detected and detection becomes impossible.
従って、マーカーの敷設時に、そのループコイルが設
定方向（例えば水平方向）に保たれるように細心の注意
が必要であり、また設置後長期間にわたってマーカーの
姿勢が変化しないような手段を講じなければならない。Therefore, when laying the marker, great care must be taken to keep the loop coil in the set direction (for example, horizontal direction), and measures must be taken to prevent the marker posture from changing for a long period after installation. I have to.
本発明は以上の問題点を解決し、マーカーの姿勢がど
のように変化しても同一の探知レベルが得られるマーカ
ーを提供することを目的とする。An object of the present invention is to solve the above problems and to provide a marker that can obtain the same detection level regardless of how the posture of the marker changes.
（問題点を解決するための手段） 本発明の探知システム用標識体は、探知信号に応動す
る共振回路のループコイルが、同一径で且つ同一回数巻
回された３つのループコイルで構成され、該３つのルー
プコイルが、それぞれのループコイルが作る平面が互い
に直交するように配設されたものである。(Means for Solving the Problems) In the marker for the detection system of the present invention, the loop coil of the resonance circuit that responds to the detection signal is composed of three loop coils that have the same diameter and are wound the same number of times. The three loop coils are arranged so that planes formed by the respective loop coils are orthogonal to each other.
（作用） マーカーの３つのループコイルを、それぞれのループ
面が互いに直交するように配設したことにより、マーカ
ーがどのような姿勢になっても、探知器のサーチコイル
から受ける交差総磁束に変化を生じることがなく、常に
一定の探知レベルを得ることができる。(Operation) By arranging the three loop coils of the marker so that the respective loop surfaces are orthogonal to each other, the cross magnetic flux received from the search coil of the detector changes regardless of the posture of the marker. It is possible to always obtain a constant detection level without causing
（実施例） 以下、本発明の一実施例を図面を参照して説明する。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の実施例を説明する図、第２図は実施
例の回路図である。FIG. 1 is a diagram for explaining an embodiment of the present invention, and FIG. 2 is a circuit diagram of the embodiment.
第１図に示すように、本発明の実施例に係るマーカー
のコイル１は、同一の径で同一の巻数の３個のループコ
イル11,12,13が、各ループコイル11,12,13のループ面が
互いに直交するように配設されている。そして、これら
ループコイル11,12,13を、例えば第２図に示すように直
列に接続し、これに水晶振動子２とコンデンサ３を並列
に接続して並列共振回路とし、これがマーカーの探知信
号応動手段を構成する。なお、ループコイル11,12,13の
接続は並列であっても同じ結果が得られる。As shown in FIG. 1, in the coil 1 of the marker according to the embodiment of the present invention, three loop coils 11, 12, 13 having the same diameter and the same number of turns are arranged in the respective loop coils 11, 12, 13. The loop surfaces are arranged so as to be orthogonal to each other. Then, these loop coils 11, 12, and 13 are connected in series as shown in FIG. 2, for example, and the crystal resonator 2 and the capacitor 3 are connected in parallel to form a parallel resonance circuit, which is a marker detection signal. It constitutes a response means. The same result can be obtained even if the loop coils 11, 12, and 13 are connected in parallel.
第１図に示すように、サーチコイル４がＸ軸、Ｚ軸で
作られる平面に対して水平に設定されているものとし、
このサーチコイル４に対してループコイル１がＸ軸、Ｙ
軸及びＺ軸方向を軸としてそれぞれ角度α，β及びγだ
け偏角したものとする（ループコイル１の任意の方向へ
の傾斜は、３軸方向の偏角で表わすことができる）。As shown in FIG. 1, it is assumed that the search coil 4 is set horizontally with respect to the plane formed by the X axis and the Z axis.
With respect to this search coil 4, the loop coil 1 has X-axis and Y-axis.
The angles are deviated by angles α, β, and γ with respect to the axis and the Z-axis direction, respectively (the inclination of the loop coil 1 in any direction can be represented by declination in the three-axis directions).
まず、Ｘ軸方向を軸とする角度αの偏角分について解
析する。First, the declination of the angle α about the X-axis direction will be analyzed.
サーチコイル４とループコイル11,12及び13との間の
それぞれの交差角度は、 ループコイル11について…「π/2−α」 ループコイル12について…「α」 ループコイル13について…「π/2」 （ループコイル13については角度αの偏角によるサーチ
コイル４との交差角度の変化はない） となる。The respective crossing angles between the search coil 4 and the loop coils 11, 12 and 13 are as follows for the loop coil 11: "π / 2-α" For the loop coil 12: "α" For the loop coil 13: "π / 2 (For the loop coil 13, there is no change in the crossing angle with the search coil 4 due to the declination of the angle α).
従って、それぞれのループコイル11,12及び13がサー
チコイル４と平行になった場合と比較して、それぞれの
交差磁束は、 ループコイル11について、 「cos2（π/2−α）＝sin2α」倍 ループコイル12について、 「cos2α」倍 ループコイル13について、 「cos2π/2＝０」倍となる。Therefore, as compared with the case where the respective loop coils 11, 12 and 13 are parallel to the search coil 4, the respective cross magnetic fluxes are “cos 2 (π / 2 −α) = sin 2 for the loop coil 11. For “α” times loop coil 12, “cos 2 α” times loop coil 13 becomes “cos 2 π / 2 = 0” times.
コイル１が受ける交差総磁束は、上記３個のループコ
イル11,12及び13の交差磁束の合計であり、従ってコイ
ル１が受ける交差磁束の変化はＸ軸方向の偏角分αにつ
いて、 「sin2α＋cos2α」倍 となり、周知のように、sin2α＋cos2α＝１であるの
で、結局Ｘ軸方向を軸とする偏角分αによる交差磁束の
変化はない。The total cross magnetic flux received by the coil 1 is the sum of the cross magnetic fluxes of the three loop coils 11, 12 and 13 described above. Therefore, the change in the cross magnetic flux received by the coil 1 is represented by "sin 2 α + cos 2 α ”times, and as is well known, sin 2 α + cos 2 α = 1, so that there is no change in the crossing magnetic flux due to the angle α about the X-axis direction.
Ｙ軸方向を軸とする偏角分β及びＺ軸方向を軸とする
偏角分γによるそれぞれの交差磁束も、上記と同じ解析
によて変化しないことが分かる。It can be seen from the same analysis as above that the respective crossing magnetic fluxes due to the deflection angle β having the Y axis direction as the axis and the deflection angle component γ having the Z axis direction as the axis do not change.
以上のことから明らかなように、マーカーのコイル１
がサーチコイル４に対していずれの方向におかれてもサ
ーチコイル４から受ける交差総磁束の変化はなく、従っ
てマーカーの敷設姿勢にかかわらず、又は敷設後に敷設
姿勢の変化があっても常に同じ一定のレベルでマーカー
とサーチコイル４との間で信号の授受を行うことができ
る。As is clear from the above, the marker coil 1
Does not change with respect to the search coil 4 in any direction, the cross magnetic flux received from the search coil 4 does not change. Therefore, regardless of the laying posture of the marker, or the laying posture changes after laying, it is always the same. Signals can be exchanged between the marker and the search coil 4 at a constant level.
３つのループコイル11,12,13を各ループコイルのルー
プ面が互いに直交するように配設するには、球体の各ル
ープコイル捲付け用の溝を設け、この溝にコイル捲付け
ればよい。各ループコイルを水晶振動子２とコンデンサ
３に連結して、水晶振動子２とコンデンサ３とを球体の
一部に形成した凹部に埋め込むと球状のマーカーが得ら
れる。球体は中空状であってもよい。また、各ループコ
イルを捲付ける溝を枠体に形成してもよい。In order to arrange the three loop coils 11, 12, 13 so that the loop surfaces of the respective loop coils are orthogonal to each other, a groove for winding each loop coil of the spherical body may be provided and the coil may be wound in this groove. When each loop coil is connected to the crystal oscillator 2 and the capacitor 3 and the crystal oscillator 2 and the capacitor 3 are embedded in the recess formed in a part of the sphere, a spherical marker is obtained. The sphere may be hollow. Further, a groove around which each loop coil is wound may be formed in the frame body.
（発明の効果） 以上説明したように、本発明探知システム用標識体に
よれば、マーカーがどのような姿勢で置かれても常に略
同一レベルで信号の授受が可能となり、マーカーの敷設
が容易になり、かつマーカーの敷設姿勢が変化しても探
知不能に陥ることはない。(Effects of the Invention) As described above, according to the marker for a detection system of the present invention, it is possible to always send and receive signals at substantially the same level regardless of the posture of the marker, which facilitates the laying of the marker. And, even if the laying posture of the marker is changed, it does not fall into the undetectable state.
図面はいずれも本発明探知システム用標識体の一実施例
を示し、第１図は本発明の実施例を説明する図、第２図
は実施例を回路図である。 １……コイル、 11,12,13……ループコイル ２……水晶振動子、３……コンデンサ ４……サーチコイルThe drawings all show an embodiment of a marker for a detection system of the present invention, FIG. 1 is a diagram for explaining an embodiment of the present invention, and FIG. 2 is a circuit diagram of the embodiment. 1 …… Coil, 11,12,13 …… Loop coil 2 …… Crystal resonator, 3 …… Capacitor 4 …… Search coil
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｇ０１Ｓ 13/88 Ｇ (72)発明者 三ツ石 敏 東京都文京区小石川２丁目５番７号 明星 電気株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Internal reference number FI Technical indication location G01S 13/88 G (72) Inventor Satoshi Mitsuishi 2-5-7 Koishikawa, Bunkyo-ku, Tokyo Meisei Electric Within the corporation
Claims (1)
いて被探知物の近傍に設置され、外部からの探知信号に
上記共振回路が応動することにより上記被探知物の存在
を知らせるようにした標識体において、前記ループコイ
ルが同一径で且つ同一回数巻回された３つのループコイ
ルで構成され、該３つのループコイルが、それぞれのル
ープコイルが作る平面が互いに直交するように配設され
たことを特徴とする探知システム用標識体。1. A resonance circuit including a loop coil is installed in the vicinity of an object to be detected, and the resonance circuit responds to a detection signal from the outside to notify the presence of the object to be detected. In the marker, the loop coil is composed of three loop coils having the same diameter and wound the same number of times, and the three loop coils are arranged so that planes formed by the respective loop coils are orthogonal to each other. A marker for a detection system, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62193294A JPH087264B2 (en) | 1987-07-31 | 1987-07-31 | Signs for detection systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62193294A JPH087264B2 (en) | 1987-07-31 | 1987-07-31 | Signs for detection systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6438684A JPS6438684A (en) | 1989-02-08 |
| JPH087264B2 true JPH087264B2 (en) | 1996-01-29 |
Family
ID=16305521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62193294A Expired - Fee Related JPH087264B2 (en) | 1987-07-31 | 1987-07-31 | Signs for detection systems |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH087264B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7307595B2 (en) * | 2004-12-21 | 2007-12-11 | Q-Track Corporation | Near field location system and method |
-
1987
- 1987-07-31 JP JP62193294A patent/JPH087264B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6438684A (en) | 1989-02-08 |
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