JPH02287265A - Apparatus for detecting welding magnetic field - Google Patents
Apparatus for detecting welding magnetic fieldInfo
- Publication number
- JPH02287265A JPH02287265A JP1110445A JP11044589A JPH02287265A JP H02287265 A JPH02287265 A JP H02287265A JP 1110445 A JP1110445 A JP 1110445A JP 11044589 A JP11044589 A JP 11044589A JP H02287265 A JPH02287265 A JP H02287265A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- welding
- light
- arc
- current
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 230000000694 effects Effects 0.000 claims description 13
- 230000004927 fusion Effects 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 10
- 230000010287 polarization Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 230000005374 Kerr effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、アーク溶接や電子ビーム溶接等の電磁気的エ
ネルギーによる溶接装置で、その溶接部分での磁界を検
出することにより、溶接電流値の変化を検出するように
したものである。Detailed Description of the Invention (Industrial Field of Application) The present invention is a welding device that uses electromagnetic energy such as arc welding or electron beam welding. It is designed to detect changes.
（従来技術）
従来、溶接中の溶接電流を検出するものとして、例えば
特開昭６３−１６５０８３号に示されたものがある。こ
れは、高周波溶接における一対の導体リード構体に光フ
ァラデー素子を配置し、この光ファラデー素子に光ファ
イバーを介して接続される溶接電流検出部を導体リード
構体から離隔配置し、導体リード構体を流れる電流によ
り形成される磁界の変動にともなう出射光強度の変化で
溶接電流の変化を検出するようにしたものである。(Prior Art) Conventionally, as a device for detecting welding current during welding, there is a device disclosed in, for example, Japanese Patent Application Laid-open No. 165083/1983. In this method, an optical Faraday element is arranged in a pair of conductor lead structures for high-frequency welding, and a welding current detection part connected to the optical Faraday element via an optical fiber is placed away from the conductor lead structure, and the current flowing through the conductor lead structure is The change in the welding current is detected by the change in the intensity of the emitted light due to the change in the magnetic field formed by the welding.
（解決しようとする課題）
前記従来の技術を、アーク溶接や電子ビーム溶接のよう
に空間内を電子が流れる形式の溶接法に利用しても、こ
のような溶接法では空間電子流により形成される磁界が
ノイズとして導体リード構体での磁界に作用し、正確な
電流値を検出することが出来ないという問題があった。(Problem to be Solved) Even if the above-mentioned conventional technology is used for welding methods in which electrons flow in space, such as arc welding or electron beam welding, in such welding methods, the There is a problem in that the magnetic field acts as noise on the magnetic field in the conductor lead structure, making it impossible to accurately detect the current value.
本発明は、このような点に着目して、高精度に溶接電流
を検出できる磁界検出装置を提供することを目的とする
。The present invention focuses on such points and aims to provide a magnetic field detection device that can detect welding current with high accuracy.
（課題を解決するための手段）
上記目的を達成するために本発明は、アーク溶接や電子
ビーム溶接のように電磁気的エネルギーを使用して溶接
する溶接装置での溶接磁界を検出するに当たり、光ファ
ラデー効果や光力−効果等の磁気光学効果を示す検出素
子と、この検出素子に光を入射する投光手段と、検出素
子から出射した光を受光して電気信号に変換する光検知
手段とで磁界検出機構を構成し、この検出素子を溶接部
の近傍に配設し、溶接個所でのアーク放電電流や電子ビ
ーム流等の空間電子流により形成される磁界の変動で空
間電子流の変化を出射光強度の変化として光検知手段で
検出することにより溶接磁界を検出するように構成した
ことを特徴としている。(Means for Solving the Problems) In order to achieve the above object, the present invention provides an optical A detection element exhibiting a magneto-optical effect such as the Faraday effect or optical force effect, a light projecting means for inputting light into the detection element, and a light detection means for receiving the light emitted from the detection element and converting it into an electrical signal. constitutes a magnetic field detection mechanism, and this detection element is placed near the welding area to detect changes in the spatial electron flow due to fluctuations in the magnetic field formed by the spatial electron flow such as arc discharge current or electron beam flow at the welding location. The present invention is characterized in that the welding magnetic field is detected by detecting this as a change in the intensity of the emitted light using a light detection means.
（作 用）
本発明では、光ファラデー効果や光力−効果等の磁気光
学効果を示す検出素子と、この検出素子に光を入射する
投光手段と、検出素子から出射した光を受光して電気信
号に変換する光検知手段とで磁界検出機構を構成し、検
出素子を溶接部の近傍に配設しであるので、溶接個所で
はアーク放電電流や電子ビーム流等の空間電子流により
形成されている磁界強度が変動すると、その磁界強度の
変化に応じて検出素子を流れる光が強度変調して光検知
手段に到達することになり、溶接電流の変化を磁界の変
化として高精度に検出することになる。(Function) The present invention includes a detection element that exhibits a magneto-optical effect such as an optical Faraday effect or an optical force effect, a light projection means that inputs light into the detection element, and a light projector that receives light emitted from the detection element. A magnetic field detection mechanism is composed of a light detection means that converts into an electric signal, and the detection element is placed near the welding area. When the magnetic field strength changes, the intensity of the light flowing through the detection element is modulated according to the change in the magnetic field strength and reaches the light detection means. Changes in welding current are detected with high precision as changes in the magnetic field. It turns out.
（実施例）
図面は本発明をアーク溶接装置に適用した場合を示す概
略構成図であ４゜
この溶接磁界検出装置は、ファラデー効果やカー効果等
の磁気光学効果を示す物質で形成した検出素子（１）と
、この検出素子（１）に光を入射する投光手段（２）と
、検出素子（１）からの出射光を受光して電気信号に変
換する光検知手段（３）とで構成しである。(Example) The drawing is a schematic configuration diagram showing the case where the present invention is applied to an arc welding device. 4゜This welding magnetic field detection device uses a detection element formed of a material exhibiting magneto-optical effects such as Faraday effect and Kerr effect. (1), a light projection means (2) that makes light enter the detection element (1), and a light detection means (3) that receives the light emitted from the detection element (1) and converts it into an electrical signal. It is composed.
検出素子（１）は、一対の偏光分離プリズム（４ａ）（
４ｂ）間に磁気光学結晶（５）と光学バイアス（６）と
を一体に組み付けて構成してあり、一方の偏光分離プリ
ズム（４ａ）に投光手段（２）を光ファイバー（７）で
接続するとともに、他方の偏光分離プリズム（４ｂ）に
光検知手段（３）を光ファイバー（８）で連結しである
。The detection element (1) includes a pair of polarization separation prisms (4a) (
4b), a magneto-optic crystal (5) and an optical bias (6) are integrally assembled between them, and a light emitting means (2) is connected to one polarization separation prism (4a) with an optical fiber (7). At the same time, a light detection means (3) is connected to the other polarization separation prism (4b) by an optical fiber (8).
投光手段（２）は高輝度ＬＥＤを光源として一定波長の
光を出射するようになっており、光検知手段（３）はＰ
ＩＮフォトダイオードで検出素子（１）から出射した光
をその光強度に応じた電圧に変換するようになっている
。The light projecting means (2) uses a high-intensity LED as a light source to emit light of a certain wavelength, and the light detecting means (3) uses a high-intensity LED as a light source.
The IN photodiode converts the light emitted from the detection element (1) into a voltage corresponding to the light intensity.
そして、この溶接磁界検出装置は、その検出素子（１）
をアーク溶接装置での溶接個所における母材（９）と芯
線やワイヤで構成した電極（１０）との間即ち放電ギャ
ップ（１１）に対応させて、その先軸がアークにより発
生する磁界と平行となる状態で配置してあり、発生アー
クにより励起される磁界で検出素子（１）内を通る光の
偏光面を回転させるように構成しである。This welding magnetic field detection device has a detection element (1)
corresponds to the discharge gap (11) between the base material (9) and the electrode (10) made of core wire or wire at the welding point in the arc welding device, and its tip axis is parallel to the magnetic field generated by the arc. The polarization plane of light passing through the detection element (1) is rotated by the magnetic field excited by the generated arc.
このように構成した溶接磁界検出装置では、アーク中の
電流変化によって、発生する磁界が変動するから、磁界
の変動によって検出素子（１）内を通る光の偏光面の回
転角度が変化し、光検知手段（′３）から出力される電
圧値がアーク中の電流値に応じて変化することになり、
溶接磁界を検出することにより、溶接電流を検出するこ
とができることになる。In the welding magnetic field detection device configured in this way, the generated magnetic field fluctuates depending on the current change in the arc, so the rotation angle of the polarization plane of the light passing through the detection element (1) changes due to the fluctuation of the magnetic field, and the light The voltage value output from the detection means ('3) changes according to the current value in the arc,
By detecting the welding magnetic field, the welding current can be detected.
なお、アーク溶接装置には、被覆アーク溶接装置はもち
ろん、イナートガスアーク溶接装置、プラズマアーク溶
接装置等が含まれる。また、上記実施例ではアーク溶接
装置の放電ギャップ（９）に対応させて検出素子（１）
を配置したが、電子ビーム溶接装置のビーム通路に対応
させて配置してもよい。Note that the arc welding device includes not only a coated arc welding device, but also an inert gas arc welding device, a plasma arc welding device, and the like. In addition, in the above embodiment, the detection element (1) corresponds to the discharge gap (9) of the arc welding device.
However, it may be arranged to correspond to the beam path of the electron beam welding device.
（効 果）
本発明では、光ファラデー効果や光力−効果等の磁気光
学効果を示す検出素子と、この検出素子に光を入射する
投光手段と、検出素子から出射した光を受光して電気信
号に変換する光検知手段とで磁界検出機構を構成し、検
出素子を溶接部の近傍に配設しであるので、溶接個所で
はアーク放電電流や電子ビーム流等の空間電子流により
形成されている磁界強度が変動すると、その磁界強度の
変化に応じて検出素子を流れる光が強度変調して光検知
手段に到達することになり、溶接電流の変化を磁界の変
化として高精度に検出することになる。(Effects) The present invention includes a detection element that exhibits a magneto-optical effect such as an optical Faraday effect or an optical force effect, a light projection means that inputs light into the detection element, and a light projector that receives light emitted from the detection element. A magnetic field detection mechanism is composed of a light detection means that converts into an electric signal, and the detection element is placed near the welding area. When the magnetic field strength changes, the intensity of the light flowing through the detection element is modulated according to the change in the magnetic field strength and reaches the light detection means. Changes in welding current are detected with high precision as changes in the magnetic field. It turns out.
図面は本発明の実施例を示す概略構成図である。
１・・検出素子、 ２・・・投光手段、３・・・
光検知手段。
特許出願人 有明工業株式会社
同 岩谷産業株式会社
代理人 北 谷 寿・、□−、ン
’ｌ、＋４４：
手
続
補
正
書とオ式）
２、老朗の名称
傳棒虜岑翔楳￥
３、補正をする者
事件との関係
彬Ｔ六扉匁The drawings are schematic configuration diagrams showing embodiments of the present invention. 1...Detection element, 2...Light projecting means, 3...
Light detection means. Patent applicant: Ariake Kogyo Co., Ltd. Agent: Iwatani Sangyo Co., Ltd. Hisashi Kitatani, □-, N'l, +44: Procedural amendments and O-formula) 2. Roro's name: Denbo Pyoji Shoju 3. Amendment Relationship with the person who did the incident
Claims (1)
での溶接磁界を検出する装置であって、磁気光学効果を
示す検出素子（１）と、この検出素子（１）に光を入射
する投光手段（２）と、検出素子（１）から出射した光
を受光して電気信号に変換する光検知手段（３）とから
なり、検出素子（１）を溶接部の近傍に配設し、溶接個
所での空間電子流により形成される磁界の変動で空間電
子流の変化を出射光強度の変化として光検知手段（３）
で検出することにより、溶接磁界を検出するように構成
した溶接磁界検出装置1. A device for detecting a welding magnetic field in a welding device that performs fusion welding using electromagnetic energy, which includes a detection element (1) that exhibits a magneto-optical effect, and a light projecting means that makes light enter the detection element (1). (2) and a light detection means (3) that receives the light emitted from the detection element (1) and converts it into an electrical signal. Photodetection means (3) detects changes in the spatial electron flow as changes in the intensity of the emitted light due to fluctuations in the magnetic field formed by the spatial electron flow.
A welding magnetic field detection device configured to detect welding magnetic fields by detecting
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1110445A JPH02287265A (en) | 1989-04-28 | 1989-04-28 | Apparatus for detecting welding magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1110445A JPH02287265A (en) | 1989-04-28 | 1989-04-28 | Apparatus for detecting welding magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02287265A true JPH02287265A (en) | 1990-11-27 |
Family
ID=14535898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1110445A Pending JPH02287265A (en) | 1989-04-28 | 1989-04-28 | Apparatus for detecting welding magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02287265A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63196865A (en) * | 1987-02-10 | 1988-08-15 | Furukawa Electric Co Ltd:The | Optical current measuring apparatus |
-
1989
- 1989-04-28 JP JP1110445A patent/JPH02287265A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63196865A (en) * | 1987-02-10 | 1988-08-15 | Furukawa Electric Co Ltd:The | Optical current measuring apparatus |
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