JPS607374A - Magnetic flux measuring sensor - Google Patents
Magnetic flux measuring sensorInfo
- Publication number
- JPS607374A JPS607374A JP11642083A JP11642083A JPS607374A JP S607374 A JPS607374 A JP S607374A JP 11642083 A JP11642083 A JP 11642083A JP 11642083 A JP11642083 A JP 11642083A JP S607374 A JPS607374 A JP S607374A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic flux
- sensor
- transition temperature
- rod body
- temperature
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
- G01R33/0354—SQUIDS
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は磁束測定用センサに係り、特に超伝導を利用し
て絶対磁束を′／Ｊｔす定する磁束測定用センサに関す
る。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a sensor for measuring magnetic flux, and more particularly to a sensor for measuring magnetic flux that uses superconductivity to determine absolute magnetic flux '/Jt.
（ロ）従来技術
磁束の相対変化を測定するセンサとしては、いわゆるス
キッド型磁束計がある。(b) Prior Art As a sensor for measuring relative changes in magnetic flux, there is a so-called skid type magnetometer.
これを用いて磁束の相対値だけでなく絶対値を測定する
には磁束／Ｊ［ｌＪ定用コイルを回転する必要がある。In order to measure not only the relative value but also the absolute value of the magnetic flux using this, it is necessary to rotate the magnetic flux/J[lJ measuring coil.
それゆえ、回転のための複雑な機構を要し取り扱いが困
９：ＩＦである上、前記回転時のセンサの振動に基づく
ノイズがあり、そのため、測定感度の向上に限界があっ
た。Therefore, it requires a complicated mechanism for rotation and is difficult to handle.In addition, there is noise due to the vibration of the sensor during the rotation, and therefore there is a limit to the improvement of measurement sensitivity.
（ハ）目的
本発明は磁束の測定にあたって、磁束測定用センサを回
転しないで磁束の絶対値を１″Ａ１感度で測定しうる取
り扱い容易なる磁束測定用センサを提供することを目的
としている。(C) Objective The present invention aims to provide a magnetic flux measuring sensor that is easy to handle and can measure the absolute value of magnetic flux with a sensitivity of 1''A1 without rotating the magnetic flux measuring sensor.
（ニ）構成
本発明は高い超伝導転移１２ｊｔ度からなる超伝導線を
低い超伝導転移温度の金属からなる棒体に巻回し、た磁
束測定用センサである。(D) Structure The present invention is a magnetic flux measuring sensor in which a superconducting wire having a high superconducting transition temperature of 12 degrees is wound around a rod made of a metal having a low superconducting transition temperature.
（ホ）実施例
第１図は本発明の一実施例たるθシ束測定用センサとこ
のセンサーからの信号にノ１（づいて磁束を測定する磁
束測定回路の概略説明図であイｌ。(e) Embodiment FIG. 1 is a schematic explanatory diagram of a sensor for measuring θ flux and a magnetic flux measuring circuit for measuring magnetic flux based on the signal from the sensor, which is an embodiment of the present invention.
すなわち、１０はその超伝導転移〆？ｉ！を度がｌ’
ｌ ごある金属体からなる棒体であり、−力２ （ｌ
ｌ、Ｊ超伝導の転移温度がＴ２である金属線で、この超
伝導金属線２０ば絶縁被１模されていて適宜間！３！巻
回されている。磁束測定用センサは前記棒体１０と金圧
線２０とを含む。In other words, is 10 the superconducting transition? i! The degree is l'
l is a rod made of a certain metal body, -force2 (l
1, J is a metal wire whose superconducting transition temperature is T2, and this superconducting metal wire 20 is coated with an insulating layer and has an appropriate length of time! 3! It is wrapped. The magnetic flux measurement sensor includes the rod 10 and the gold pressure wire 20.
そして、両金属の転移温度はＴｌ＜Ｔ２の関係になって
いる。The transition temperatures of both metals have a relationship of Tl<T2.
本発明の好ましい実施例は棒体１０としては錫、金属線
２０としてはニオブが挙げられる。すなわち、錫の転移
温度は３．７度にであり、一方二オブの転移温度は９．
３度にである。In a preferred embodiment of the present invention, the rod 10 is made of tin and the metal wire 20 is made of niobium. That is, the transition temperature of tin is 3.7 degrees, while the transition temperature of niobium is 9.7 degrees.
This is the third time.
４０は例えば一点接触型のジョセフソン素子からなる公
知のスキッド素子であり、この素子は図示する如く、あ
れい伏のくりぬき部が形成してあり、一方のくりぬき部
４１にはニオブ線からなる捲線４２があり、この捲線４
２はニオブ線でもって前記金属線２０と連結されている
。Reference numeral 40 denotes a known skid element made of, for example, a single-point contact type Josephson element, and as shown in the figure, this element has a hollowed-out portion formed therein, and one hollowed-out portion 41 has a winding made of niobium wire. 42, this winding 4
2 is connected to the metal wire 20 by a niobium wire.
なお、前記また、他方のくりぬき部４３には前記１合線
４２と変成器結合した捲線４４により、スキット測定回
路５０に入力している。The other hollowed out portion 43 is connected to a winding 44 which is connected to the first combination wire 42 through a transformer, and is inputted to the skit measuring circuit 50.
しかして、前記磁束測定用センサとスキッド素子はとも
にジュワー壜６０に収納されており、ジュワー壜６０に
は液体へリュウム７０が充填されていて、磁束測定用セ
ンサとスキッド素子とを超低温に維持するように構成さ
れる。Both the magnetic flux measuring sensor and the skid element are housed in a dewar bottle 60, and the dewar bottle 60 is filled with liquid helium 70 to maintain the magnetic flux measuring sensor and the skid element at an ultra-low temperature. It is configured as follows.
なお、前記スキット測定回路とし°Ｃは、例えは、ＲＦ
イｉ号発生器５１、Ｉ＜１２イを号発生器５１の出力側
に結合されたタンク回路５３、ＲＦ増幅器５４、及びＲ
Ｆ増幅器５４の出力を検波する検波器５５を具備した公
知のものである。Note that in the skit measurement circuit, °C is, for example, RF
A tank circuit 53, an RF amplifier 54, and an R
This is a known device that includes a detector 55 that detects the output of the F amplifier 54.
第２図は本発明の詳細な説明するだめの説明図である。FIG. 2 is an explanatory diagram for explaining the present invention in detail.
同図（Ａ）はジュワー壜６０内の絶り・ｊ温度Ｔが錫の
転移？Ａ＆度′１゛１より低温に維持された場合で沙）
って、従って錫である棒体１０はいわゆる完全反磁性の
状態にあり、磁束は棒体内には胃ｊＪ１３ Ｌ、ない故
、金属線２０のコイルにも貫通しないこととなり、零θ
ダ場の状態である故、スキット測定回路の出力端子は零
（６束を検出している。In the same figure (A), is the temperature T at the end of the dewar bottle 60 the transition of tin? When maintained at a temperature lower than A°rees;1゛1)
Therefore, the rod 10 made of tin is in a so-called completely diamagnetic state, and since there is no magnetic flux inside the rod, it does not penetrate the coil of the metal wire 20, and the magnetic flux is zero θ.
Since it is in a normal state, the output terminal of the skit measurement circuit is zero (6 bundles are detected).
一方、同１ンＩ（Ｂ）はジ１−ワー壜（ｉ ０内の絶対
／Ａ！＋度Ｔが錫の転移温度Ｔｌ と金属線２０の転移
温度Ｔ２の中間に維持された場合であって、）メＬっで
棒体１０内には磁束が貫通ずるので、この場合には磁束
測定用センサの回転をしないでも磁束の変化が生じる結
果、スキッド測定回路の出力＆ｉｉｉ子にば零磁束から
の磁束の変化分の値としての信号力ぐ検出される。On the other hand, the same case I(B) is the case where the absolute /A! Since magnetic flux passes through the rod 10, in this case, a change in magnetic flux occurs even without rotation of the magnetic flux measurement sensor, resulting in zero magnetic flux at the output of the skid measurement circuit &iii. The signal force is detected as the value of the change in magnetic flux from the magnetic field.
（へ）効果
前記棒体と金属線とで構成した磁束測定用センサの絶対
温度を棒体の転移温度以下にして棒体の内部を零磁場と
した後、棒体と金属線の転移温度の中間の温度にして磁
束の測定をするものである故、本発明に係る磁束測定用
センサを用いれば磁束の’ｄ（＋Ｊ定にあたって磁束測
定用コイルを回転する必要がなくなり、機構を簡単にす
ることが可能となる。また回転に基づくノイズが全くな
い故、Δ（り定感度の向上が期待できる。(f) Effect After the absolute temperature of the magnetic flux measurement sensor composed of the rod and the metal wire is lower than the transition temperature of the rod and the inside of the rod is set to zero magnetic field, the transition temperature of the rod and the metal wire is Since the magnetic flux is measured at an intermediate temperature, if the magnetic flux measuring sensor according to the present invention is used, there is no need to rotate the magnetic flux measuring coil to determine the magnetic flux 'd (+J), which simplifies the mechanism. In addition, since there is no noise due to rotation, an improvement in the Δ(r constant sensitivity) can be expected.
第１図は本発明の一実施例たる磁束測定用センナとこの
センサーからの信号に基づいて磁束を測定する磁束測定
回路の概略説明図、第２図は本発明の詳細な説明するた
めの説明図である。
１０・・・棒体、２ｏ・・・絶縁被映超伝導線、４０・
・・スキッド素子、５０・・・スキッド／！！！Ｊ定回
路、６０・・・ジュワー１仝；。
特許出願人 株式会社島沖ふり作所
代理人 弁理士 大 西 孝 治
（Ａ）
ｉ栄
９．３Ｋ ＞ Ｔ ＞ ３．７に
２図
（Ｂ）
患栄
Ｔ ＜ ３７にFIG. 1 is a schematic explanatory diagram of a magnetic flux measuring sensor and a magnetic flux measuring circuit that measures magnetic flux based on a signal from this sensor, which is an embodiment of the present invention, and FIG. 2 is a detailed explanation of the present invention. It is a diagram. 10... Rod body, 2o... Insulated coated superconducting wire, 40...
...Skid element, 50...Skid/! ! ! J constant circuit, 60... Dewar 1. Patent Applicant: Shimaoki Furi Seisakusho Co., Ltd. Agent: Patent Attorney: Takaharu Ohnishi (A)
Claims (1)
低い転移温度の金属からなる棒体に巻回したことを特徴
とする磁束測定用センサ。(1) A sensor for measuring magnetic flux, characterized in that an insulating coated superconducting wire having a high superconducting transition temperature is wound around a rod made of a metal having a low transition temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11642083A JPS607374A (en) | 1983-06-27 | 1983-06-27 | Magnetic flux measuring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11642083A JPS607374A (en) | 1983-06-27 | 1983-06-27 | Magnetic flux measuring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS607374A true JPS607374A (en) | 1985-01-16 |
Family
ID=14686637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11642083A Pending JPS607374A (en) | 1983-06-27 | 1983-06-27 | Magnetic flux measuring sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS607374A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0266478A (en) * | 1988-08-31 | 1990-03-06 | Shimadzu Corp | Magnetic field detecting device |
| US4978922A (en) * | 1989-08-31 | 1990-12-18 | Westinghouse Electric Corp. | Superconducting sensor for quench detection in a superconductor |
-
1983
- 1983-06-27 JP JP11642083A patent/JPS607374A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0266478A (en) * | 1988-08-31 | 1990-03-06 | Shimadzu Corp | Magnetic field detecting device |
| US4978922A (en) * | 1989-08-31 | 1990-12-18 | Westinghouse Electric Corp. | Superconducting sensor for quench detection in a superconductor |
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