JPS5997771A - Detection of welding current - Google Patents
Detection of welding currentInfo
- Publication number
- JPS5997771A JPS5997771A JP57207548A JP20754882A JPS5997771A JP S5997771 A JPS5997771 A JP S5997771A JP 57207548 A JP57207548 A JP 57207548A JP 20754882 A JP20754882 A JP 20754882A JP S5997771 A JPS5997771 A JP S5997771A
- Authority
- JP
- Japan
- Prior art keywords
- welding current
- amplifier
- welding
- signal
- detection
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 55
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 230000005291 magnetic effect Effects 0.000 claims abstract description 21
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 230000005294 ferromagnetic effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 4
- 230000004907 flux Effects 0.000 abstract description 4
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は、溶接電流の検出方法に関する。[Detailed description of the invention] The present invention relates to a method for detecting welding current.
溶接ケーブルを流れる溶接電流の検出には、センサーと
して、従来、直流の場合にはリードスイッチや分流器、
交流の場合には変流器を用いている。しかし、リードス
イッチは、有接点である為に、寿命が短く、使用場所に
制限を受け、応答が遅く、ノイズを生じやすぐ小型化に
も限界がある。又、分流器や変流器は、溶接電流回路に
挿入される為に、大型で高価となる他、溶接電流が高周
波成分を含む場合には、該高周波除去用これらのセンサ
ーを通して後段の信号処理回路に侵入するので高耐圧の
高価な高周波除去用のフィルターを設けなくてはならず
、一層、高価なものとなる。Conventionally, sensors used to detect the welding current flowing through the welding cable include reed switches, shunts, and
In the case of alternating current, a current transformer is used. However, since the reed switch is a contact point, it has a short lifespan, is limited in the places where it can be used, has a slow response, generates noise, and is limited in its ability to be easily miniaturized. In addition, since shunts and current transformers are inserted into the welding current circuit, they are large and expensive, and if the welding current contains high frequency components, the subsequent signal processing is performed through these sensors for removing the high frequency components. Since it invades the circuit, it is necessary to provide an expensive high-voltage filter for removing high-frequency waves, making the product even more expensive.
本発明は、上記した従来の問題点に鑑みてなされたもの
で、溶接ケーブル゛を流れる溶接′１ｊ、： ｋ Ｋよ
って作られる磁界内に磁電変換素子を配し、該磁電変換
素子から取出した電気信号を信号処理して溶接電流の有
無もしくは溶接電流の大きさを検出する構成とすること
により、溶接電流が直流であっても交流であっても使用
することができ、センサ一部を小型・軽量化し、悪環境
下でも感度・応答性にすぐれた電流検出を行うことがで
き、費用がか＼らない溶接電流の検出方法を提供するこ
とケ目的とする。The present invention has been made in view of the above-mentioned conventional problems, and includes a magnetoelectric transducer arranged in a magnetic field created by welding flowing through a welding cable. By processing electrical signals to detect the presence or absence of welding current or the magnitude of welding current, it can be used regardless of whether the welding current is direct current or alternating current, and the sensor part can be made smaller. - The purpose is to provide an inexpensive welding current detection method that is lightweight, can perform current detection with excellent sensitivity and responsiveness even in adverse environments, and is inexpensive.
以下、本考案の一実施例を図面を参照して説明する。An embodiment of the present invention will be described below with reference to the drawings.
第１図において、１０は溶接電流（交流）ｉが流れる溶
接ケーブル、２ｏは磁電変換素子であって、溶接ケーブ
ル１ｏの電流検出位置に、第２図（イ）に示す如く取付
けられる。―において、１１及□び１２は溶接ケーブル
１゜の夫々ケーブル導体及び絶縁物、２１は強磁性体板
であって、溶接ケーブル１ｏに巻着されて磁電変換素子
２０と共にセンサ一部を！：’ｊ成し、その巻始め端２
１ａと巻終の４２．．１’ｂ間に磁電変換素子２０が挿
入される。この磁電変換素子２０としてはホール素子が
用いられ、誘起するホール電圧Ｖは増巾器３０で増巾さ
れる。４０は位相反転器、５ｏＡ１５０Ｂは比較器であ
る。比較器５０Ａは位相反転器４０を介して増巾器３０
の出力Ｑｖが入力され、比較器５０ＢＫｔｆｉ増巾器３
０（７）出方Ｑ ｖが直接導かｎる。両比較器５０Ａ、
５０Ｂ共に入力を電流設定値■（と比較して、前者は、
る■（位相反転器４０の出力）〉Ｋである場合、後者は
、Ｑｖ）Ｋでろる場合に、夫々信号Ｐ、及びＰ２ を出
力する。６０は加算器であって、比較器５０Ａの出力Ｐ
１と比較、器５０Ｂの出力Ｐ２が導かれ、加算信号ｐ
、＝＝ ｐ、 ＋、、ｐ ２ ｋ積分器７０に送出する
゛、、積分器７０の出力は検出信号Ｍとして図示しない
検出リレーのリン−駆動部８０に入力される。なお、電
流設定値には設定器９０を用い溶接電流、ｉの大きさに
対応して変更する。３０〜９０は信号処理部を構成する
。In FIG. 1, 10 is a welding cable through which welding current (alternating current) i flows, and 2o is a magnetoelectric conversion element, which is attached to the current detection position of the welding cable 1o as shown in FIG. 2(A). -, 11 and 12 are the cable conductors and insulators of the welding cable 1°, and 21 is a ferromagnetic plate, which is wound around the welding cable 1o and forms part of the sensor together with the magnetoelectric conversion element 20! ：'j is formed, the beginning of the volume 2
1a and 42 at the end of the volume. ．． A magnetoelectric conversion element 20 is inserted between 1'b. A Hall element is used as the magnetoelectric conversion element 20, and the induced Hall voltage V is amplified by an amplifier 30. 40 is a phase inverter, and 5oA150B is a comparator. The comparator 50A is connected to the amplifier 30 via the phase inverter 40.
The output Qv of is input, and the comparator 50BKtfi amplifier 3
0(7) Output Q v can be directly derived n. Both comparators 50A,
50B both input the current setting value (compared to the former,
(output of phase inverter 40)>K, the latter outputs signals P and P2, respectively, when Qv)K. 60 is an adder, and the output P of the comparator 50A
1, the output P2 of the device 50B is derived, and the addition signal p
, == p, +, , p 2 k sent to the integrator 70. The output of the integrator 70 is input as a detection signal M to a link drive section 80 of a detection relay (not shown). Note that the current setting value is changed using a setting device 90 in accordance with the magnitude of the welding current and i. 30 to 90 constitute a signal processing section.
＄３図に各部出力の波形を゛示す。Figure 3 shows the waveforms of each part's output.
この構成において、グープル導体１１に溶接電流ｌ゛が
流れると、溶接電流ｉの大きさに対応した密度の交番磁
束Φが図示矢印方向に強磁体板２１中を流れ、強磁体板
２１？端間にある磁電変換素子２０に交番する検出磁界
が加わる。この検出磁界が加わると磁電変換素子２０が
交番磁束Φに対応するホール電圧ｖｉ誘起して増巾器３
０に入力する。増巾器３０の出力Ｑ〜′が電流設定値に
、ｌ：、Ｊ犬であると、比較器５０Ａ、５０Ｂが夫々、
Ｑｖ＞Ｋ１Ｑｖ〉Ｋの間、定ンベルの信号Ｐ１、Ｐ２を
夫々出力尊る。この信号Ｐ８、Ｐ２は電気角１８０度毎
に交互発生するので加算器６０からは第３図に示す如く
、不連続な信号Ｐが出力される。積算器７０はこの不連
続な信号Ｐｉ連続信号Ｍに変換してリン−駆動部８０に
送出するので、検出リレーが働いて所定の溶接電流ｉが
流れたことが検出される。In this configuration, when a welding current l' flows through the goople conductor 11, an alternating magnetic flux Φ with a density corresponding to the magnitude of the welding current i flows through the ferromagnetic plate 21 in the direction of the arrow shown in the figure, and the ferromagnetic plate 21? An alternating detection magnetic field is applied to the magnetoelectric transducer 20 located between the ends. When this detection magnetic field is applied, the magnetoelectric conversion element 20 induces a Hall voltage vi corresponding to the alternating magnetic flux Φ, and the amplifier 3
Enter 0. When the output Q~' of the amplifier 30 is the current setting value, l:, J, the comparators 50A and 50B respectively,
During Qv>K1Qv>K, constant bell signals P1 and P2 are outputted, respectively. Since the signals P8 and P2 are generated alternately every 180 electrical degrees, the adder 60 outputs a discontinuous signal P as shown in FIG. Since the integrator 70 converts this discontinuous signal Pi into a continuous signal M and sends it to the link drive section 80, the detection relay is activated and it is detected that the predetermined welding current i has flowed.
本実施例では、溶接ケーブル１０に強磁体板２−１を巻
着して磁束を集束させるようにしであるので、溶接電流
ｌが小芒い場合にも強磁性、体板２１の板端間に、磁電
変換素子２０を作動させるに、充分な強度の検出磁界が
得られる。In this embodiment, since the ferromagnetic plate 2-1 is wound around the welding cable 10 to focus the magnetic flux, even if the welding current l is small, the ferromagnetic In addition, a detection magnetic field of sufficient strength can be obtained to operate the magnetoelectric transducer 20.
Ｔ、Ｉ Ｇ溶接やパルス溶接を行う場合のように溶接電
流ｉに高周波電流成分が含１れていてイ１、（８接電流
回路とは完全に絶縁されており、−股にこの高岡Ｖ電流
成分の電流平均値が小きいのて、磁電変換素子２０の出
力は実質上、λ゛、゛ｊ周波成分シ影響を受けない。も
し、高周波成分の影響が無視することができず、ノイズ
となる場合には、第２図（ロ）に示す如く、アルミ箔の
ようシ非磁性導体２２を溶接ケーブル１０の電流検出位
置に巻装して接地し高周波じゃへいをする。When performing T, I G welding or pulse welding, the welding current i contains a high frequency current component. Since the current average value of the current components is small, the output of the magnetoelectric transducer 20 is virtually unaffected by the λ゛, ゛j frequency components.If the influence of the high frequency components cannot be ignored and noise In this case, as shown in FIG. 2(B), a non-magnetic conductor 22 such as aluminum foil is wrapped around the current detection position of the welding cable 10 and grounded to provide high frequency protection.
又、検出磁界が外部磁界の影響ヲ受けるような場合には
、磁電変換素子２０、強磁性体板２１を含むセンサ一部
分を透磁率の高い全綱で作った箱等に収めて磁気じゃへ
いする。In addition, if the detected magnetic field is affected by an external magnetic field, a part of the sensor including the magnetoelectric conversion element 20 and the ferromagnetic plate 21 is housed in a box etc. made entirely of steel with high magnetic permeability to prevent magnetic fields. .
このようにすれば、溶接電流による電磁誘導障害をも防
ぐことができる。In this way, it is also possible to prevent electromagnetic induction interference caused by welding current.
本実施例は、溶接電流ｌの有無を検出する為、比較器５
０Ａ、５０Ｂｋ用いてレベル検出を行っているが、両者
を夫々差動増巾器におきかえれば、定レベルではなく、
溶接電流ｌのレベルに対応してレベルが変化する検出信
号を積分器７０から取出すことができるので、この検出
信号を表示装置に導いて、溶接電流呈の大きさを表示さ
せたり、溶接電流制御装置へフィードバック信号として
導き定電流制御を行わせたシすることができる。In this embodiment, a comparator 5 is used to detect the presence or absence of welding current l.
Level detection is performed using 0A and 50Bk, but if you replace both with differential amplifiers, the level will not be fixed,
Since a detection signal whose level changes in accordance with the level of welding current l can be extracted from the integrator 70, this detection signal can be led to a display device to display the magnitude of the welding current, or to control the welding current. It can be guided as a feedback signal to the device to perform constant current control.
第４図に、溶接電流ｉが直流である場合の実施例を示す
。この場合には、磁電変換素子２０に誘起するホール電
圧Ｖが直流であるため、比較器５０の出力は連続信号と
なり、直接該比較器５０の出力を検出信号Ｎとして用い
ることができる。第５図に各部出力の波形を示す。FIG. 4 shows an embodiment in which the welding current i is direct current. In this case, since the Hall voltage V induced in the magnetoelectric conversion element 20 is a direct current, the output of the comparator 50 becomes a continuous signal, and the output of the comparator 50 can be directly used as the detection signal N. FIG. 5 shows the waveforms of the outputs of each part.
以上の如く、本発明によれば、溶接電流が寛
作る磁界内に磁界変換素子を配して間接的に溶接電流の
有無もしくはその変化を検出する電
構成としたことによシ、磁界変換素子は直流、交番の両
磁界に応動するので、溶接電流の交直を問わす−これを
検出することができ、溶接電流回路と電気的に絶縁され
る為、センサ一部が小型軽量で安価なもの、とな、る上
、信号処」４１５回路も簡単になり、高周波成分の影響
を簡単に排除することができる。As described above, according to the present invention, the magnetic field converting element is disposed within the magnetic field created by the welding current, and the magnetic field converting element is arranged to indirectly detect the presence or absence of the welding current or a change in the magnetic field. Since it responds to both direct current and alternating magnetic fields, it is possible to detect whether the welding current is alternating or alternating.Since it is electrically isolated from the welding current circuit, the sensor part is small, lightweight, and inexpensive. Moreover, the signal processing circuit 415 is also simplified, and the influence of high frequency components can be easily eliminated.
史に、センサ一部が有接点型でない為に、応答性に優れ
、堅守で、設定場所が悪環境であっても′安心して長期
使用することができる。Historically, since some of the sensors are not contact type, they have excellent responsiveness and are reliable, allowing for long-term use with peace of mind even in adverse environments.
第１図は本発明による溶接電流の検出方法。
を実施した検出装置のブロック図、第２図（イ） ・及
び（ロ）は上記実施例におけるセンサ一部の断面配置図
、第３図は上記実施例における各部波形のタイムチャー
ト、第４図は本発明の他の実施例を示すブロック図、第
５図は第４図の実施例における各部波形のタイムチャー
トである。
２０・・・磁電変換素子
２１・・・強磁性体板
２２・・・非磁性導体
３０・・・増巾器
４０・・・位相反転器
５（Ｌ、５０Ａ、５０Ｂ・・・比較器
６０・・・加算器
７０・・・積分器
特許出願人
株式会社 神戸製鋼所
代理人 弁理士 小林博FIG. 1 shows a welding current detection method according to the present invention. 2 (a) and (b) are cross-sectional layout diagrams of a part of the sensor in the above embodiment, FIG. 3 is a time chart of waveforms of each part in the above embodiment, and FIG. 5 is a block diagram showing another embodiment of the present invention, and FIG. 5 is a time chart of waveforms of various parts in the embodiment of FIG. 20...Magnetoelectric conversion element 21...Ferromagnetic plate 22...Nonmagnetic conductor 30...Amplifier 40...Phase inverter 5 (L, 50A, 50B...Comparator 60. ... Adder 70 ... Integrator Patent Applicant Kobe Steel Co., Ltd. Representative Patent Attorney Hiroshi Kobayashi
Claims (6)
電変換素子を配し、該磁電変換素子から取出される電気
信号を信号処理部で信号処理して定レベルもしくは上記
溶接電流の大きさに対応する検出信号を得ることを特徴
とする溶接電流の検出方法。(1) A magneto-electric transducer is arranged in the magnetic field created by the welding current that cuts through the welding cable, and the electric signal extracted from the magneto-electric transducer is processed by a signal processing section to a fixed level or the magnitude of the welding current mentioned above. A welding current detection method characterized by obtaining a detection signal corresponding to.
し、該強磁性体板の板端間に磁電変換素子を配すること
番特徴とする）所許請求の範囲第１項記載の溶接電流の
検出方法。(2) A ferromagnetic plate is wound around the current detection position of the welding cable, and a magnetoelectric conversion element is arranged between the ends of the ferromagnetic plate. Detection method of welding current.
性導体で取巻き、該非磁性導体の外側に磁電変換素子を
配することを特徴とする特許請求の範囲第１項記載の溶
接電流の検出方法。(3) Detection of welding current according to claim 1, characterized in that the current detection position of the welding cable is surrounded by a grounded nonmagnetic conductor, and a magnetoelectric conversion element is arranged outside the nonmagnetic conductor. Method.
を介゛して入力される比較器を具える７ことを特徴とす
る請求 記載の溶接電流の検出方法。(4) The welding current detection method according to claim 7, wherein the signal processing section includes a comparator into which the electric signal of the magnetoelectric transducer is inputted via an amplifier.
及び位相反転されて夫々導かれる比較器、両比較器の出
力を加算して積分器に導く加算器を具えることを特徴と
する特許請求の範囲第１項記載の溶接電流の検出方法。 □(5) The Shinshu processing unit includes an amplifier, a comparator to which the output of the amplifier is guided directly and after being phase inverted, and an adder that adds the outputs of both comparators and leads to the integrator. A method for detecting a welding current according to claim 1, characterized in that: □
及び位相反転されて夫々導かれる差動増巾器、両差動増
巾器の出力を加算して積分器に導く加算器を具えている
ことを特徴とする特許請求の範囲第１項記載の溶接電流
の検出方法。(6) The signal processing unit adds the outputs of the amplifier, the differential amplifier to which the output of the amplifier is directly guided and the output of the amplifier is guided with phase inversion, and the outputs of both differential amplifiers to the integrator. 2. The method of detecting a welding current according to claim 1, further comprising an adder for detecting a welding current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57207548A JPS5997771A (en) | 1982-11-29 | 1982-11-29 | Detection of welding current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57207548A JPS5997771A (en) | 1982-11-29 | 1982-11-29 | Detection of welding current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5997771A true JPS5997771A (en) | 1984-06-05 |
| JPS6230870B2 JPS6230870B2 (en) | 1987-07-04 |
Family
ID=16541553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57207548A Granted JPS5997771A (en) | 1982-11-29 | 1982-11-29 | Detection of welding current |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5997771A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432540U (en) * | 1977-08-06 | 1979-03-03 | ||
| JPS5432538U (en) * | 1977-08-05 | 1979-03-03 | ||
| JPS54148638U (en) * | 1978-04-07 | 1979-10-16 |
-
1982
- 1982-11-29 JP JP57207548A patent/JPS5997771A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432538U (en) * | 1977-08-05 | 1979-03-03 | ||
| JPS5432540U (en) * | 1977-08-06 | 1979-03-03 | ||
| JPS54148638U (en) * | 1978-04-07 | 1979-10-16 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6230870B2 (en) | 1987-07-04 |
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