JPH0720571U - Fixed structure of core sensor - Google Patents
Fixed structure of core sensorInfo
- Publication number
- JPH0720571U JPH0720571U JP5677193U JP5677193U JPH0720571U JP H0720571 U JPH0720571 U JP H0720571U JP 5677193 U JP5677193 U JP 5677193U JP 5677193 U JP5677193 U JP 5677193U JP H0720571 U JPH0720571 U JP H0720571U
- Authority
- JP
- Japan
- Prior art keywords
- core
- detection element
- magnetic
- magnetic detection
- opening
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 230000004907 flux Effects 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 239000013307 optical fiber Substances 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
(57)【要約】
【目的】磁気検出素子の位置決めを容易にすると共に磁
気検出素子とコアの開口部との固定を簡易なものとし、
製造コストの低減を実現可能なコアセンサの固定構造を
提供することを目的とする。
【構成】開口部を有する環状の磁性体コアの前記開口部
に、前記コアに生じる磁束を検出する為の磁気検出素子
を狭持したコアセンサに於いて、前記コアの開口部に、
所定の間隙を隔して２枚の固定板を配設すると共に、該
固定板間に前記磁気検出素子を挿入し、前記固定板の一
方に設けた押しネジと前記磁気検出素子との間に当て板
及び弾性体シート配置し、前記押しネジを捩込むことに
よって前記磁気検出素子を固定したものである。
(57) [Abstract] [Purpose] To facilitate the positioning of the magnetic sensor and to fix the magnetic sensor and the opening of the core easily.
It is an object of the present invention to provide a core sensor fixing structure capable of realizing reduction in manufacturing cost. In a core sensor having a magnetic detection element for detecting a magnetic flux generated in the core in the opening of an annular magnetic core having an opening, the core sensor has an opening.
Two fixing plates are arranged with a predetermined gap therebetween, and the magnetic detection element is inserted between the fixing plates, and the magnetic detection element is inserted between a push screw provided on one of the fixing plates and the magnetic detection element. A backing plate and an elastic sheet are arranged, and the magnetic detection element is fixed by screwing the push screw.
Description
【０００１】[0001]
導体中を流れる電流値をその回路を切断することなく測定するタイプの電流検 出器に用いるコアセンサ、殊に環状コアの開口部に磁気検出素子を狭持固定する ための構造に関する。 The present invention relates to a core sensor used in a current detector of a type that measures a current value flowing in a conductor without disconnecting the circuit, and particularly to a structure for sandwiching and fixing a magnetic detection element in an opening of an annular core.
【０００２】[0002]
磁気光学素子のもつファラデー効果を用いて電流測定を行う光ＣＴ（ｃｕｒｒ ｅｎｔ ｔｒａｎｓ．）が近年電力の計測システム等の分野を初め広く利用され るようになった。これは、電流を検出するセンサ部と計測部とを光ファイバにて リンクする構成をとることにより、高い絶縁性と耐雑音性を確保し、電力設備の 電流の高品質な計測を可能とするものである。 In recent years, optical CT (current trans.) For measuring current using the Faraday effect of a magneto-optical element has been widely used in the field of electric power measurement systems and the like. This is because the sensor unit that detects the current and the measurement unit are linked by an optical fiber, ensuring high insulation and noise resistance, and enabling high-quality measurement of the current of power equipment. It is a thing.
【０００３】 図２（ａ）、（ｂ）は導体中を流れる電流値をその回路を切断することなく測 定するクリップオンタイプのコアセンサ１の構成を示す平面図及び正面図であっ て、開口部２を有する環状の磁性体コア３の前記開口部２に、前記コア３に生じ る磁束を検出する為の磁気検出素子４を挿入し、開口部２の両端面と磁気検出素 子４とをエポキシ樹脂系の接着剤５にて接着固定したものである。2A and 2B are a plan view and a front view showing a configuration of a clip-on type core sensor 1 for measuring a current value flowing in a conductor without cutting the circuit, and FIG. A magnetic detection element 4 for detecting a magnetic flux generated in the core 3 is inserted into the opening 2 of the annular magnetic core 3 having the portion 2, and both end surfaces of the opening 2 and the magnetic detection element 4 are connected. Is bonded and fixed with an epoxy resin adhesive 5.
【０００４】 このタイプのセンサは、コア３の中央を電線（図示しない）が貫通する如く設 置すると、前記電線を流れる電流に応じて磁束がコア３内に発生する。磁気検出 素子４を構成するファラデー素子（図示しない）は開口部２の磁界の大きさに比 例して透過する光線の偏光角を変化させるから、計測部（図示しない）より光フ ァイバ６を介して直線偏光を磁気検出素子４に入力し、ファラデー素子を透過し た光線を光ファイバ７を介して取り出し、計測部にてその偏光角を計測しこれを 以て電線に流れる電流値を検出する。 このように構成することによって電線中を流れる電流値を、その回路を切断す ることなく測定することが可能となる。When this type of sensor is installed so that an electric wire (not shown) penetrates through the center of the core 3, a magnetic flux is generated in the core 3 according to the current flowing through the electric wire. Since the Faraday element (not shown) that constitutes the magnetic detection element 4 changes the polarization angle of the transmitted light beam in comparison with the magnitude of the magnetic field of the opening 2, the optical fiber 6 is sent from the measurement section (not shown). Linearly polarized light is input to the magnetic detection element 4 via this, the light beam that has passed through the Faraday element is taken out via the optical fiber 7, the polarization angle is measured by the measurement unit, and the current value flowing in the wire is detected by this. To do. With this configuration, it is possible to measure the current value flowing in the wire without disconnecting the circuit.
【０００５】 しかしながら、開口部２の最も磁束密度が高い位置にファラデー素子即ち磁気 検出素子４を配置したとき高感度となり、位置がずれるにしたがって感度が低下 することは自明であり、実際に製造する場合にあっては磁気検出素子４の位置決 めをした後、所定の治具等でこれを保持して接着剤５を塗布し、該接着剤５が硬 化するまでこの状態を維持しなければならず、製造工程が極めて煩雑となると云 う欠点があった。However, it is obvious that when the Faraday element, that is, the magnetic detection element 4 is arranged at the position where the magnetic flux density is the highest in the opening 2, the sensitivity becomes high, and the sensitivity decreases as the position shifts, so it is actually manufactured. In some cases, the magnetic detection element 4 should be positioned, then held by a predetermined jig or the like to apply the adhesive 5, and this state must be maintained until the adhesive 5 hardens. However, there is a drawback that the manufacturing process becomes extremely complicated.
【０００６】[0006]
本考案は上述した如き従来のコアセンサの固定構造の欠点を除去するためにな されたものであって、磁気検出素子の位置決めを容易にすると共に磁気検出素子 とコアの開口部との固定を簡易なものとし、製造コストの低減を実現可能なコア センサの固定構造を提供することを目的とする。 The present invention has been made to eliminate the drawbacks of the conventional fixing structure of the core sensor as described above, and facilitates the positioning of the magnetic detection element and simplifies the fixing of the magnetic detection element and the opening of the core. It is an object of the present invention to provide a fixing structure for a core sensor that can reduce the manufacturing cost.
【０００７】[0007]
上述の目的を達成するため本考案は、開口部を有する環状の磁性体コアの前記 開口部に、前記コアに生じる磁束を検出する為の磁気検出素子を狭持したコアセ ンサに於いて、 前記コアの開口部に、所定の間隙を隔して２枚の固定板を配設すると共に、該 固定板間に前記磁気検出素子を挿入し、前記固定板の一方に設けた押しネジと前 記磁気検出素子との間に当て板及び弾性体シート配置し、前記押しネジを捩込む ことによって前記磁気検出素子を固定したことを特徴とするコアセンサの固定構 造。 To achieve the above object, the present invention provides a core sensor in which a magnetic detection element for detecting a magnetic flux generated in the core is sandwiched in the opening of an annular magnetic core having an opening. Two fixing plates are arranged in the opening of the core with a predetermined gap therebetween, the magnetic detection element is inserted between the fixing plates, and the pressing screw provided on one of the fixing plates and A fixing structure for a core sensor, wherein a contact plate and an elastic sheet are arranged between the magnetic sensor and the magnetic sensor, and the magnetic sensor is fixed by screwing the push screw.
【０００８】[0008]
以下、本考案を実施例を示す図面に基づいて詳細に説明する。 図１（ａ）、（ｂ）は夫々本考案に係るコアセンサ８の固定構造の一実施例を 示す平面図及びＡ−Ａ′断面図である。 開口部２には固定板９、１０を環状コア３の円周面と平行、且つ所定の間隙を 隔して配置し、ボルト１１、１２によってコア３に固定する。固定板９には少な くとも一の押しネジ１３を具備せしめる。 而して、前記固定板９、１０の間に、磁気検出素子４をゴムシート１４及び当 て板１５と共に挿入する。このとき同図（ｂ）に示す如く固定板１０から図中上 方に磁気検出素子４、ゴムシート１４、当て板１５の順で配置する。尚、固定板 １０は図中上面に磁気検出素子４の図中下面が密着したとき、該磁気検出素子４ を構成するファラデー素子（図示しない）が図中矢印Ｚ方向に関して最も磁束密 度の高い位置に配置されるよう厚みを選択してある。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment. 1 (a) and 1 (b) are respectively a plan view and an AA 'sectional view showing an embodiment of a fixing structure of a core sensor 8 according to the present invention. Fixing plates 9 and 10 are arranged in the opening 2 in parallel with the circumferential surface of the annular core 3 with a predetermined gap therebetween, and fixed to the core 3 with bolts 11 and 12. The fixing plate 9 is equipped with at least one push screw 13. Then, the magnetic detection element 4 is inserted between the fixing plates 9 and 10 together with the rubber sheet 14 and the contact plate 15. At this time, as shown in FIG. 3B, the magnetic detection element 4, the rubber sheet 14, and the backing plate 15 are arranged in this order from the fixed plate 10 upward in the drawing. When the lower surface of the magnetic detection element 4 of the fixing plate 10 is in close contact with the upper surface of the drawing, the Faraday element (not shown) constituting the magnetic detection element 4 has the highest magnetic flux density in the direction of arrow Z in the drawing. The thickness is selected so that it is placed in position.
【０００９】 さらに、同図（ａ）の矢印Ｘ方向に前記磁気検出素子４をずらしながら測定を 行ない、該磁気検出素子４の感度が最も高くなる位置を求め、前記押しネジ１３ を捩込むことによって、前記当て板１５及びゴムシート１４を介して磁気検出素 子４を固定板１０に押圧固定する。ここで当て板１５は押しネジ１３による集中 応力を当て板１５の面積に分散する役目を、ゴムシート１４は熱膨張率の違いに よる応力を吸収する為のダンパ材としての役目を果たす。Further, measurement is performed while shifting the magnetic detection element 4 in the direction of arrow X in FIG. 1A, a position where the sensitivity of the magnetic detection element 4 is highest is obtained, and the push screw 13 is screwed in. Thus, the magnetic detection element 4 is pressed and fixed to the fixed plate 10 via the contact plate 15 and the rubber sheet 14. Here, the contact plate 15 serves to disperse the concentrated stress due to the push screw 13 in the area of the contact plate 15, and the rubber sheet 14 functions as a damper material for absorbing the stress due to the difference in the coefficient of thermal expansion.
【００１０】 上述した如き構成としたことにより、接着剤の塗布及び硬化を製造工程から省 略することとなり、接着剤が硬化するまで磁気検出素子４を保持する為の治具を 必要としない固定構造となる。また、固定板１０の上面の位置によって前記矢印 Ｚ方向に関する位置決め工程を省略することが可能となる。 従って、治具の着脱、接着剤の塗布及び硬化、素子の位置決めと云った煩雑な 工程及びそれに要する時間を省略できると云う極めて大きな効果をもたらすもの であって、これは従来より若干構成部品数が増加することを補って余りある。By adopting the above-mentioned configuration, the application and curing of the adhesive are omitted from the manufacturing process, and the fixture for holding the magnetic detection element 4 is not required until the adhesive is cured. It becomes a structure. Further, depending on the position of the upper surface of the fixing plate 10, the positioning step in the arrow Z direction can be omitted. Therefore, it has an extremely great effect that complicated steps such as attachment / detachment of jigs, application / curing of adhesive, positioning of elements and the time required therefor can be omitted. Is more than compensated for the increase.
【００１１】 尚、以上本考案を環状のコアにファラデー素子を用いた磁気検出素子を狭持固 定した電流検出用のコアセンサを例として説明したが、本考案はこれのみに限定 されるものではなく、ファラデー素子以外の他の素子例えばホール素子等を用い た磁気検出素子をコアに固定する場合に適用してもよい。 また、ゴムシートに代えて他の弾性体をシート状に加工した弾性体シートを用 いてもよいこと説明するまでもなく明らかである。 さらに、固定板、当て板、弾性体シート等の構成部品を磁性体材料とすれば、 コアの開口部から漏れる磁束が少なくなり、磁気検出素子を透過する磁束が増大 しセンサとしての感度が増大する。The present invention has been described above by taking a core sensor for current detection in which a magnetic detection element using a Faraday element is sandwiched and fixed to an annular core as an example, but the present invention is not limited to this. Instead, it may be applied to the case where a magnetic detection element using an element other than the Faraday element, such as a Hall element, is fixed to the core. Further, it is obvious without needing to explain that an elastic body sheet obtained by processing another elastic body into a sheet shape may be used instead of the rubber sheet. Furthermore, if the magnetic plate is used for the components such as the fixing plate, the contact plate, and the elastic sheet, the magnetic flux leaking from the opening of the core is reduced, the magnetic flux passing through the magnetic detection element is increased, and the sensitivity of the sensor is increased. To do.
【００１２】[0012]
本考案は、以上説明した如く構成するものであるから、磁気検出素子の位置決 めが容易となり、磁気検出素子とコアの開口部との固定が簡易なものとなるため 製造工程が簡略化され製造コストがなるという極めて著しい効果を奏する。 Since the present invention is configured as described above, the magnetic sensing element can be easily positioned, and the magnetic sensing element and the opening of the core can be easily fixed, thus simplifying the manufacturing process. This has a very remarkable effect of increasing manufacturing cost.
【００１３】[0013]
【図１】（ａ）、（ｂ）は夫々本考案に係るコアセンサ
の固定構造の一実施例を示す平面図及びＡ−Ａ′断面図
である。1A and 1B are a plan view and an AA ′ sectional view showing an embodiment of a core sensor fixing structure according to the present invention, respectively.
【図２】（ａ）、（ｂ）は従来ののコアセンサの構成を
示す平面図及び正面図。2A and 2B are a plan view and a front view showing a configuration of a conventional core sensor.
１、８・・・コアセンサ ２・・・開口部 ３・・・コア ４・・・磁気検出素子 ９、１０・・・固定板 １３・・・押しネジ １４・・・ゴムシート １５・・・当て板 1, 8 ... Core sensor 2 ... Opening portion 3 ... Core 4 ... Magnetic detection element 9, 10 ... Fixing plate 13 ... Push screw 14 ... Rubber sheet 15 ... Contact Board
Claims (1)
口部に、前記コアに生じる磁束を検出する為の磁気検出
素子を狭持したコアセンサに於いて、 前記コアの開口部に、所定の間隙を隔して２枚の固定板
を配設すると共に、該固定板間に前記磁気検出素子を挿
入し、前記固定板の一方に設けた押しネジと前記磁気検
出素子との間に当て板及び弾性体シート配置し、前記押
しネジを捩込むことによって前記磁気検出素子を固定し
たことを特徴とするコアセンサの固定構造。1. A core sensor in which a magnetic detection element for detecting a magnetic flux generated in the core is sandwiched in the opening of an annular magnetic core having an opening, wherein a predetermined size is provided in the opening of the core. The two magnetic plates are arranged with a space between them, and the magnetic detection element is inserted between the fixed plates, and the magnetic detection element is placed between the push screw provided on one of the fixed plates and the magnetic detection element. A fixing structure for a core sensor, characterized in that a plate and an elastic sheet are arranged, and the magnetic detection element is fixed by screwing the push screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5677193U JPH0720571U (en) | 1993-09-27 | 1993-09-27 | Fixed structure of core sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5677193U JPH0720571U (en) | 1993-09-27 | 1993-09-27 | Fixed structure of core sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0720571U true JPH0720571U (en) | 1995-04-11 |
Family
ID=13036744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5677193U Pending JPH0720571U (en) | 1993-09-27 | 1993-09-27 | Fixed structure of core sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0720571U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015151152A1 (en) * | 2014-03-31 | 2015-10-08 | ギガフォトン株式会社 | Mirror device |
| JP2017181220A (en) * | 2016-03-30 | 2017-10-05 | 日置電機株式会社 | Current detection sensor and current measurement device |
-
1993
- 1993-09-27 JP JP5677193U patent/JPH0720571U/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015151152A1 (en) * | 2014-03-31 | 2015-10-08 | ギガフォトン株式会社 | Mirror device |
| JPWO2015151152A1 (en) * | 2014-03-31 | 2017-04-13 | ギガフォトン株式会社 | Mirror device |
| US9882334B2 (en) | 2014-03-31 | 2018-01-30 | Gigaphoton Inc. | Mirror device |
| JP2017181220A (en) * | 2016-03-30 | 2017-10-05 | 日置電機株式会社 | Current detection sensor and current measurement device |
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