JPS63150686A - Metal detector - Google Patents
Metal detectorInfo
- Publication number
- JPS63150686A JPS63150686A JP61298555A JP29855586A JPS63150686A JP S63150686 A JPS63150686 A JP S63150686A JP 61298555 A JP61298555 A JP 61298555A JP 29855586 A JP29855586 A JP 29855586A JP S63150686 A JPS63150686 A JP S63150686A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- pipe
- receiving coil
- transmitting
- receiving
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims description 34
- 238000001514 detection method Methods 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 15
- 230000035945 sensitivity Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
Landscapes
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、金属検知器に関し、筒状パイプ内の同一軸線
上に送信コイル及び受信コイルを対向配置することによ
り、敷設作業時における送受信コイル間の軸合せ作業を
不要にし、敷設作業を容易化したものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a metal detector, and by arranging a transmitting coil and a receiving coil facing each other on the same axis in a cylindrical pipe, the distance between the transmitting and receiving coils during installation work is reduced. This eliminates the need for axis alignment work and simplifies installation work.
従来の技術
送受信コイル間の結合の変化より、例えば車両等の金属
物を検知する金属検知器は、例えば特公昭５８−４４２
２９号公報等で公知である。この従来技術においては、
別々に構成された送信コイル及び受信コイルを、車両検
知現場において個別的に敷設しておき、受信コイルの誘
起電圧が車両の有無によって変化することを利用して、
車両を検知するものであった。受信コイルの誘起電圧は
、送信コイル及び受信コイルのコイル軸の向きによって
変化するから、安定した受信感度を確保するためには、
送信コイル及び受信コイルのコイル軸を所定の向きに設
定すると同時に、設定後にコイル軸が変化しないように
することが重要である。Conventional technology A metal detector that detects metal objects such as vehicles by changing the coupling between transmitting and receiving coils is known, for example, from Japanese Patent Publication No. 58-442.
It is publicly known from Publication No. 29 and the like. In this conventional technology,
Separately configured transmitting coils and receiving coils are installed separately at the vehicle detection site, and by utilizing the fact that the induced voltage in the receiving coil changes depending on the presence or absence of a vehicle,
It was used to detect vehicles. The induced voltage in the receiving coil changes depending on the orientation of the coil axes of the transmitting coil and receiving coil, so in order to ensure stable receiving sensitivity,
It is important to set the coil axes of the transmitting coil and the receiving coil in a predetermined direction, and at the same time to prevent the coil axes from changing after the setting.
発明が解決しようとする問題点
ところが、従来の金属検知器では、別々の独立する製品
となっている送信コイル及び受信コイルを、検知現場に
おいて個別的に敷設していたため、次のような問題点が
あった。Problems to be Solved by the Invention However, in conventional metal detectors, the transmitting coil and receiving coil, which are separate and independent products, were installed separately at the detection site, resulting in the following problems. was there.
（イ）敷設時に、送信コイル及び受信コイルのコイル軸
を所定の方向となるように、軸合せを行なう必要があり
、コイル敷設作又性が悪くなる。(a) During installation, it is necessary to align the coil axes of the transmitting coil and the receiving coil so that they are aligned in a predetermined direction, which impairs the ease of installing the coils.
（ロ）敷設時に送信コイル及び受信コイルのコイル軸が
設計値からズレ易く、そのため、所定の受信感度を確保
することが困難である。(b) During installation, the coil axes of the transmitting coil and receiving coil tend to deviate from their designed values, making it difficult to ensure a predetermined receiving sensitivity.
（ハ）送信コイル及び受信コイルが互いに別個に敷設さ
れているため、敷設後にも、送信コイル及び受信コイル
のコイル軸の向きが相対的に変化し易い、このため、受
信感度が変動してしまうという問題点もある。(c) Since the transmitting coil and receiving coil are installed separately from each other, the orientation of the coil axes of the transmitting coil and receiving coil is relatively easy to change even after installation, which causes reception sensitivity to fluctuate. There is also a problem.
問題点を解決するための手段
上述する従来の問題点を解決するため、本発明は、送信
コイル及び送受信コイルの間の結合の変化から金属物を
検知する金属検知器において、筒状パイプ内に、コイル
軸が前記パイプの軸線と略平行となるように、送信コイ
ル及び受信コイルを間隔をおいて対向配置したことを特
徴とする。Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention provides a metal detector that detects a metal object from a change in coupling between a transmitting coil and a transmitting/receiving coil. A transmitting coil and a receiving coil are arranged facing each other with an interval so that the coil axis is substantially parallel to the axis of the pipe.
作用
本発明に係る金属検知器において、金属物の有無により
、送信コイル及び送受信コイルの間の結合が変化するか
ら、この結合の変化より、金属物の有無を検知できる。Function: In the metal detector according to the present invention, the coupling between the transmitter coil and the transmitter/receiver coil changes depending on the presence or absence of a metal object, so the presence or absence of a metal object can be detected from the change in coupling.
送信コイル及び受信コイルは、筒状パイプ内に、コイル
軸が前記パイプの軸線と略平行となるように、間隔をお
いて対向配置する。従って、送信コイル及び受信コイル
は筒状パイプによって一製品化されるので、敷設作業が
容易になる。The transmitting coil and the receiving coil are disposed in a cylindrical pipe to face each other with an interval so that the coil axis is substantially parallel to the axis of the pipe. Therefore, since the transmitter coil and the receiver coil are integrated into a single product using a cylindrical pipe, installation work becomes easier.
しかも、送信コイル及び受信コイルのコイル軸は、送信
コイル及び受信コイルをパイプの内部へ組込むのと同時
に、パイプの内部において、その軸線と略平行となるよ
うな向きに定められるから、敷設時にコイル軸合せ作業
が不要になる。Furthermore, the coil axes of the transmitting coil and receiving coil are oriented approximately parallel to the axes of the pipe at the same time as the transmitting coil and receiving coil are installed inside the pipe. No need for alignment work.
また、送信コイル及び受信コイルのコイル軸は、パイプ
への組込みと同時に、パイプの軸線方向に固定化され、
敷設後にコイル軸が動く等の事態を生じることがない。Furthermore, the coil axes of the transmitter coil and the receiver coil are fixed in the axial direction of the pipe at the same time as they are assembled into the pipe.
There is no possibility of the coil shaft moving after installation.
このため、受信感度の変動を招くことない高信頼度の金
属検知器が実現できる。Therefore, a highly reliable metal detector that does not cause fluctuations in reception sensitivity can be realized.
更に、送信コイル及び受信コイルのコイル軸がパイプの
軸線上で一致しているから、高い検出感度を確保できる
。Furthermore, since the coil axes of the transmitting coil and the receiving coil are aligned on the axis of the pipe, high detection sensitivity can be ensured.
また、送信コイル及び受信コイルをパイプ内に内蔵させ
たことにより、防水性、耐久性の高い金属検知器を実現
することも容易になる。Further, by incorporating the transmitting coil and the receiving coil within the pipe, it becomes easy to realize a highly waterproof and durable metal detector.
実施例
第１図は本発明に係る金属検知器の一部欠損図、第２図
は同じくその側面図である０図において、ｌは筒状バイ
ブ、２は送信コイル、３は受信コイルである。パイプ１
は例えば硬質塩化ビニル等の非金属材料でなるものであ
る。送信コイル２及び受信コイル３は、ポビン２１．３
１にコイル２２．３２を巻回した空芯コイルでなり、パ
イプｌの軸方向の両端側において、ボビン２１．３１の
外周部をパイプ１の内部に嵌合挿着させである。送信コ
イル２及び受信コイル３は、コイル軸がパイプ１の軸線
の方向と一致するようにして、間隔ｄをおいて同軸対向
となるように配置しである。このように、送信コイル２
及び受信コイル３が筒状バイブ１によって一製品化され
るので、敷設作業時に一製品として取扱うことができる
ようになり、敷設作業が容易になる。しかも、送信コイ
ル２及び受信コイル３のコイル軸は、パイプｌの内部へ
の組込みと同時に、パイプ１の軸線と略平行となるよう
な向きに定められるから１ｇＬ設時にコイル軸合せ作業
が不要であり、この面からも敷設作業が著しく容易にな
る。Embodiment FIG. 1 is a partially cutaway view of a metal detector according to the present invention, and FIG. 2 is a side view thereof. In FIG. . pipe 1
is made of a non-metallic material such as hard vinyl chloride. The transmitting coil 2 and the receiving coil 3 are pobin 21.3
The outer circumference of the bobbin 21.31 is fitted into the inside of the pipe 1 at both ends of the pipe 1 in the axial direction. The transmitting coil 2 and the receiving coil 3 are arranged so that their coil axes coincide with the direction of the axis of the pipe 1 and are coaxially opposed to each other with an interval d between them. In this way, transmitting coil 2
Since the receiving coil 3 and the receiving coil 3 are integrated into one product by the cylindrical vibrator 1, they can be handled as one product during the installation work, and the installation work becomes easier. Furthermore, the coil axes of the transmitting coil 2 and receiving coil 3 are oriented to be approximately parallel to the axis of the pipe 1 at the same time as they are installed inside the pipe 1, so there is no need to align the coil axes when installing 1gL. This also greatly facilitates the installation work.
また、送信コイル２及び受信コイル３のコイル軸が、パ
イプ１への組込みと同時に、パイプの軸線方向に固定化
され、敷設後にコイル軸が動く等の事態を生じることが
ないので、受信感度の変動を招くことがない。In addition, the coil axes of the transmitting coil 2 and receiving coil 3 are fixed in the axial direction of the pipe at the same time as they are installed in the pipe 1, and there is no possibility that the coil axes will move after installation, which improves the receiving sensitivity. Does not cause fluctuations.
更に、送信コイル２及び受信コイル３のコイル軸がパイ
プ１の軸線ヒで一致しているから、高い検出感度を確保
できる。Furthermore, since the coil axes of the transmitting coil 2 and the receiving coil 3 coincide with each other along the axis of the pipe 1, high detection sensitivity can be ensured.
ポビン２１．３１とパイプ１との接合部分は全周面に亘
って接着剤４を塗布する。こうすることにより、送信コ
イル２及び受信コイル３のあるパイプｌの内部へ防水性
を確保できること、バイブ１に対する送信コイル２及び
受信コイル３の取付は強度が高くなり、コイル軸変動が
一層確実に防止できること等の利点が得られる。Adhesive 4 is applied to the entire circumference of the joint between the pobbin 21.31 and the pipe 1. By doing this, it is possible to ensure waterproofness inside the pipe l where the transmitting coil 2 and the receiving coil 3 are located, the strength of the attachment of the transmitting coil 2 and the receiving coil 3 to the vibrator 1 is increased, and the coil axis fluctuation is more securely prevented. There are advantages such as being able to prevent
６はケーブル、７はケーブルコネクタ、８及び９は回路
基板、１０．１１は回路基板８．９上に搭載された電子
回路である。ケーブルコネクタ７は送信コイル２のポビ
ン２１の軸心上でその端面にネジ止め等の手段によって
挿着されている。6 is a cable, 7 is a cable connector, 8 and 9 are circuit boards, and 10.11 is an electronic circuit mounted on the circuit board 8.9. The cable connector 7 is inserted onto the end surface of the pobbin 21 of the transmitting coil 2 on its axis by screwing or other means.
ケーブル６はケーブルコネクタ７及び送信コイル２のポ
ビン２１を貫通してバイブ１の内部に導入され、バイブ
ｌの内部に内蔵された送信コイル２、受信コイル３及び
電子回路１０．１１に接続されている。ケーブルコネク
タ７とケーブル６との接触面や、ケーブルコネクタ７の
送信コイル２のポビン２１との間の結合面にはシリコー
ン樹脂５等を塗布して、防水性を確保する。The cable 6 passes through the cable connector 7 and the pobbin 21 of the transmitting coil 2, is introduced into the inside of the vibrator 1, and is connected to the transmitting coil 2, the receiving coil 3, and the electronic circuit 10.11 built into the inside of the vibrator 1. There is. Silicone resin 5 or the like is applied to the contact surface between the cable connector 7 and the cable 6 and the joint surface between the cable connector 7 and the pobbin 21 of the transmitting coil 2 to ensure waterproofness.
回路基板８は送信コイル２のポビン２１に、また回路基
板９は受信コイル３のポビン３１に取付は固定されてい
る０回路基板８．９の上に搭載された電子回路ｉｏ、ｉ
−ｔは送信コイル２を駆動する信号発生器、受信コイル
２からの受信信号を増幅する増幅器及び入出力回路等を
備えて構成される□。The circuit board 8 is fixed to the pobin 21 of the transmitting coil 2, and the circuit board 9 is fixed to the pobin 31 of the receiving coil 3.Electronic circuits io, i mounted on the circuit board 8.9
-t is □, which is configured with a signal generator that drives the transmitting coil 2, an amplifier that amplifies the received signal from the receiving coil 2, an input/output circuit, and the like.
更にこの実施例では、バイブ１の金属検知側Ａとは反対
側Ｂを、板状の金属部材１２で被覆しである。このよう
な金属部材１２を備えると、当該金属検知器を地中に埋
設した場合、検知面側Ａとは反対側Ｂに例え金属物があ
ったとしても、金属物による送信コイル２と受信コイル
３との間の結合の乱れが小さくなるので、安定した検出
動作が得られる。Furthermore, in this embodiment, the side B of the vibrator 1 opposite to the metal detection side A is covered with a plate-shaped metal member 12. When such a metal member 12 is provided, when the metal detector is buried underground, even if there is a metal object on the side B opposite to the detection surface side A, the transmitting coil 2 and the receiving coil due to the metal object Since the disturbance in the coupling with 3 is reduced, a stable detection operation can be obtained.
第３図は本発明に係る金属検出器の電気回路図であり、
１３は送信コイル２を駆動する信号発生器、１４は受信
コイル３からの受信信号を増幅する増幅器、１５は入出
力部である。信号発生器１３、増幅器１４及び入出力部
１５は、電子回路１０．１１として、送信コイル２及び
受信コイル３と共に、パイプ１の内部に内蔵させである
。FIG. 3 is an electrical circuit diagram of a metal detector according to the present invention,
13 is a signal generator that drives the transmitting coil 2; 14 is an amplifier that amplifies the received signal from the receiving coil 3; and 15 is an input/output section. The signal generator 13, amplifier 14, and input/output section 15 are built into the pipe 1 together with the transmitting coil 2 and receiving coil 3 as an electronic circuit 10.11.
第４図及び第５図は本発明に係る金属検知器を車両検知
器として使用した応用例を示している。4 and 5 show an application example in which the metal detector according to the present invention is used as a vehicle detector.
車両検知器１６は車両１７を検知しようとする場所の地
中に、パイプ１の軸が水平になるように、適当な深さで
埋設しである。車両１７が当該車両検知器１６の上にあ
る場合と、ない場合とで、送信コイル２と受信コイル３
との間の結合が異なり、受信コイル３の受信電圧レベル
が車両１７の有無に応じて変化する。これによって車両
１７の有無を検知できる。車両１７が車両検知器１６の
上にある限り、受信コイル３の受信レベルは一定である
から、連続検知が可俺である。The vehicle detector 16 is buried in the ground at an appropriate depth at a location where a vehicle 17 is to be detected so that the axis of the pipe 1 is horizontal. The transmitting coil 2 and the receiving coil 3 differ depending on whether the vehicle 17 is above the vehicle detector 16 or not.
The coupling between the two is different, and the received voltage level of the receiving coil 3 changes depending on the presence or absence of the vehicle 17. With this, the presence or absence of the vehicle 17 can be detected. As long as the vehicle 17 is above the vehicle detector 16, the reception level of the receiving coil 3 is constant, so continuous detection is possible.
発明の効果
以上述べたように、本発明は、送信コイル及び送受信コ
イルの間の結合の変化から金属物を検知する金属検知器
において、筒状パイプ内に、コイル軸が前記バイブの軸
線と略平行となるように、送信コイル及び受信コイルを
間隔をおいて対向配置したことを特徴とするから、次の
ような効果が得られる。Effects of the Invention As described above, the present invention provides a metal detector that detects a metal object from a change in coupling between a transmitting coil and a transmitting/receiving coil. Since the transmitting coil and the receiving coil are arranged facing each other with an interval so that they are parallel to each other, the following effects can be obtained.
（ａ）送信コイル及び受信コイルが筒状パイプによって
一製品化されるので、敷設作業が容易になる。(a) Since the transmitter coil and the receiver coil are integrated into a single product using a cylindrical pipe, installation work becomes easier.
Ｃｂ）敷設作業時の送信コイル及び受信コイルのコイル
軸合せ作業が不要であり、敷設作業が著しく簡単になる
。Cb) There is no need to align the coil axes of the transmitting coil and the receiving coil during the installation work, which greatly simplifies the installation work.
（Ｃ）敷設後にコイル軸が動く等の事態を生じることが
ないため、受信感度の変動を招くことない高信頼度の金
属検知器が実現できる。(C) Since the coil shaft does not move after installation, a highly reliable metal detector that does not cause fluctuations in receiving sensitivity can be realized.
（ｄ）送信コイル及び受信コイルのコイル軸がパイプの
軸線上で一致しているから、高い検出感度を確保できる
。(d) Since the coil axes of the transmitting coil and the receiving coil are aligned on the axis of the pipe, high detection sensitivity can be ensured.
（ｅ）送信コイル及び受信コイルをバイブ内に内蔵させ
たことにより、防水性、耐久性の高い金属検知器を容易
に実現できる。(e) By incorporating the transmitter coil and the receiver coil inside the vibrator, a highly waterproof and durable metal detector can be easily realized.
第１図は本発明に係る金属検知器の一部欠損図、第２図
は同じくその側面図、第３図は本発明に係る金属検出器
の電気回路図、第４図及び第５図は本発明に係る金属検
知器を車両検知器として使用した応用例をそれぞれ示し
ている。
１・・・パイプ
２＠争・送信コイル
３・・−受信コイルFIG. 1 is a partially cutaway view of a metal detector according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is an electric circuit diagram of the metal detector according to the present invention, and FIGS. 4 and 5 are Application examples in which the metal detector according to the present invention is used as a vehicle detector are shown. 1...Pipe 2@Conflict/Transmitting coil 3...-Receiving coil
Claims (2)
ら金属物を検知する金属検知器において、筒状パイプ内
に、コイル軸が前記パイプの軸線と略平行となるように
、送信コイル及び受信コイルを間隔をおいて対向配置し
たことを特徴とする金属検知器。(1) In a metal detector that detects metal objects from changes in coupling between a transmitting coil and a transmitting/receiving coil, the transmitting coil and the receiving coil are placed in a cylindrical pipe so that the coil axis is approximately parallel to the axis of the pipe. A metal detector characterized by having coils arranged facing each other at intervals.
部材で被覆したことを特徴とする特許請求の範囲第１項
に記載の金属検知器。(2) The metal detector according to claim 1, wherein the cylindrical pipe is coated with a metal member on the side opposite to the metal detection side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61298555A JPS63150686A (en) | 1986-12-15 | 1986-12-15 | Metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61298555A JPS63150686A (en) | 1986-12-15 | 1986-12-15 | Metal detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63150686A true JPS63150686A (en) | 1988-06-23 |
Family
ID=17861253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61298555A Pending JPS63150686A (en) | 1986-12-15 | 1986-12-15 | Metal detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63150686A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05240961A (en) * | 1992-02-28 | 1993-09-21 | Honda Denshi Giken:Kk | Vehicle detector |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5246834A (en) * | 1975-10-07 | 1977-04-14 | Thomson Csf | Electromagnetic sensor for sensing change of magnetic field |
-
1986
- 1986-12-15 JP JP61298555A patent/JPS63150686A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5246834A (en) * | 1975-10-07 | 1977-04-14 | Thomson Csf | Electromagnetic sensor for sensing change of magnetic field |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05240961A (en) * | 1992-02-28 | 1993-09-21 | Honda Denshi Giken:Kk | Vehicle detector |
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