JPS5841333A - Temperature detector - Google Patents

Temperature detector

Info

Publication number
JPS5841333A
JPS5841333A JP14010281A JP14010281A JPS5841333A JP S5841333 A JPS5841333 A JP S5841333A JP 14010281 A JP14010281 A JP 14010281A JP 14010281 A JP14010281 A JP 14010281A JP S5841333 A JPS5841333 A JP S5841333A
Authority
JP
Japan
Prior art keywords
optical fiber
metal tube
temperature
light
fibers
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
Application number
JP14010281A
Other languages
Japanese (ja)
Inventor
Shuichi Tai
田井　修市
Kazuo Hisama
和生 久間
Masahiro Nunoshita
布下　正宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP14010281A priority Critical patent/JPS5841333A/en
Publication of JPS5841333A publication Critical patent/JPS5841333A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/50—Measuring temperature based on the expansion or contraction of a material the material being a solid arranged for free expansion or contraction
    • G01K5/52—Measuring temperature based on the expansion or contraction of a material the material being a solid arranged for free expansion or contraction with electrical conversion means for final indication

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

PURPOSE:To enable temperature measurement without being affected by a strong magnetic or electric field by detecting temperature variation from the amount of of light transmission due to variation in the spaces between optical fibers. CONSTITUTION:Optical fibers 7 and 8 are located coaxially in a metal tube 6 are opposed to each other at a space 10 to form a U-shaped curve. When with this construction, the temperature around the metal tube 6 within a member 1 under measurement increases so that the temperatur of the metal tube 6 and the fibers 7, 8 rise, the space 10 between the fibers 7 and 8 is expanded due to a difference between the thermal expansion coefficient of the fibers 7, 8 and that of the metal tube 6. With the space 10 increasing, the amount of light entering from fiber 7 through the space 10 into the fiber 8 is reduced, whereby the temperature can be measured by detecting the variation in intensity of light received by the light detecting device 12a.

Description

【発明の詳細な説明】 この発明は光７アイパを用いて温度を検出する温度検出
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature detection device that detects temperature using an optical 7-eyeper.

従来、温度検出装置としては、ゼーベック効果を利用す
るものが多く用いられており、この例をオ１図に示す。Conventionally, many temperature detection devices have been used that utilize the Seebeck effect, and an example of this is shown in Fig. 1.

図において、（１）は温度が測定される被測定部材、（
！１け熱電対であり、被測定部材に伝熱的に設けられて
いる。ここで、熱電対（！１の熱起電力は、補償鋼線（
３）を介し冷接点補償器（４）を通抄、直流増幅器ｆｉ
ｌに導びかれ、被測定部材１１１の温度に比例した出力
となるので、被測定部材ｆｉ＋の温度の測定が実現でき
る。In the figure, (1) indicates the member to be measured whose temperature is measured, (
! It is a single thermocouple and is installed on the member to be measured for heat transfer. Here, the thermoelectromotive force of the thermocouple (!1) is the compensating steel wire (!
3) Pass the cold junction compensator (4) through the DC amplifier fi
Since the output is proportional to the temperature of the member to be measured 111, it is possible to measure the temperature of the member to be measured fi+.

従来のゼーベック効果を利用する温度検出装置は、以上
のように構成されているので、冷接点補償器が必要であ
ること、また、測定回路に金ｍ専線を用いる必要がある
ため、回転電機の内部のような、高磁界、高電界の存在
する環境下では使用できないという欠点があった。Conventional temperature detection devices that utilize the Seebeck effect are configured as described above, so they require a cold junction compensator and use a dedicated wire in the measurement circuit, making them difficult to use in rotating electrical machines. The drawback was that it could not be used in environments with high magnetic fields and high electric fields, such as inside a car.

この発明は以上のような従来のものの欠点を除去するた
めになされたもので、光ファイバとその支持部材の熱膨
張率の差を利用して、高磁界、高電界の影響を受けずに
温度測定ができる温度検出装置の提供を目的としている
。This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and utilizes the difference in thermal expansion coefficient between an optical fiber and its supporting member to increase temperature without being affected by high magnetic fields and high electric fields. The purpose is to provide a temperature detection device that can perform measurements.

以下、この発明の一実施例を図によって説明する。第１
図において、（６）は支持部材であり、銅製のＵ字形に
成形された金属管である。一端からオｌの光ファイバけ
）が挿入され、他端から第３の光ファイバ（８１が挿入
されている。Hereinafter, one embodiment of the present invention will be described with reference to the drawings. 1st
In the figure, (6) is a support member, which is a U-shaped metal tube made of copper. A third optical fiber (81) is inserted from one end, and a third optical fiber (81) is inserted from the other end.

金属管（６）の両端部において、オｌの光ファイバ（７
）およびオＢの光ファイバｉｌｌはそれぞれ接着部材（
９）で金属管（６）に固着されている。Two optical fibers (7) are connected at both ends of the metal tube (6).
) and the optical fiber ill of OB are each attached with an adhesive member (
9) is fixed to the metal tube (6).

オｌの光ファイバ（７）とｙｓの光ファイバ（８１とけ
金属管（６）内で同軸上に位置し、聞隙叫を介して各々
の端面がＵ字形の曲線部で対向している。The optical fiber 7 and the optical fiber 81 are located coaxially within the metal tube 6, and their end faces face each other at a U-shaped curved portion with a gap between them.

オｌの光ファイバ（））の、金属管（６）側と反対側の
端部は光源（１１）に接続されている。また第３の光７
アイパ（８１の金属管（６）側と反対側の端部は光検出
手段Ｏｆｉの光検出器（ｌ［１に接続されていも以上の
構成において、被測定部材＋１１内に設置される金属管
（６）の周囲の温度が上昇し、金属管（６）の温度およ
びオｌの光ファイ／４’　＋７）および第１の光ファイ
バ（８１の温度が上昇すると、牙ｌの光ファイバ（〕）
および第１の光ファイバ（８１の熱膨張係数と金属管１
６）の熱膨張係数との差異により１オｌの光ファイバ（
７）と第１の光ファイ／４１岨との闇の間１１（Ｍｍが
広がる。間隙叫の大きさの変化＃′ｉ。The end of the second optical fiber () on the side opposite to the metal tube (6) is connected to a light source (11). Also the third light 7
The end of the Aiper (81 on the opposite side to the metal tube (6) side is connected to the photodetector (l[1) of the photodetection means Ofi. In the above configuration, the metal tube installed in the member to be measured +11 When the temperature around (6) increases, the temperature of the metal tube (6) and the temperature of the optical fiber /4' +7) and the first optical fiber (81) increases, )
and a first optical fiber (with a thermal expansion coefficient of 81 and a metal tube 1
6) Due to the difference in thermal expansion coefficient, 1 ol optical fiber (
7) and the first optical fiber/41 岨 11 (Mm widens. Change in the size of the gap scream #'i.

仁の実施例において、金属管（６１の全長がａｏｓｍの
ときに約＊　４ｚｉｇであった・したがって、間隙１１
αの大傘さが拡大すると、オｌの光ファイバけ）２オ１
の光ファイバ１８１との間の光通路の結合効率の低下、
すなわちオｌの光ファイノ（（〕）から間Ｑ（２）を介
して牙１の光ファイバ（＠１に入射する光の光量の減少
が起る。このような性質を利用することによって、光検
出器（ｌｊｌａ）で受光される光の強度の変化から温度
の測定が実現できる。なお間障叫の大きさの変化による
光ファイバ（γ）（８１間の光の伝達量の変ｅは、光フ
ァイバの端面での最大受光角（最大入射角であり、また
光の出る場合の最大広がり角でもある）の大きい光ファ
イバはど大きくなるので、金属管ｔｅｌの全長を短くす
るためには、できるだけ最大受光角の大きい光ファイバ
を用いれば良い、また、金属管（６１の形状をＵ字形に
しているので、光ファイバ＋？）　＋８１は、自らの弾
性によって曲率を有する金属管（６）内壁外周に押えつ
けられて第１の光ファイバ（７）の光軸と第３の光ファ
イバ（８１の光軸とを常に一致させることができる。In the example of Jin, the total length of the metal tube (61 was about *4zig when aosm; therefore, the gap 11
When the large umbrella of α expands, the optical fiber of
a reduction in the coupling efficiency of the optical path between the optical fiber 181 and the optical fiber 181;
In other words, the amount of light that enters the optical fiber (@1) of Fang 1 from the optical fiber (()) of OI via the gap Q(2) decreases. Temperature can be measured from changes in the intensity of light received by the detector (ljla).The change e in the amount of light transmitted between the optical fibers (γ) (81) due to changes in the magnitude of the interference is as follows: An optical fiber with a large maximum acceptance angle (maximum incident angle and maximum spread angle when light is emitted) at the end face of the optical fiber will be large, so in order to shorten the total length of the metal tube tel, It is sufficient to use an optical fiber with a maximum acceptance angle as large as possible.In addition, a metal tube (the shape of 61 is U-shaped, so it is an optical fiber +?) +81 is the inner wall of the metal tube (6) which has a curvature due to its own elasticity. Being pressed against the outer periphery, the optical axis of the first optical fiber (7) and the optical axis of the third optical fiber (81) can always be aligned.

次にこの発明の他の実施例を牙３図に示す。Next, another embodiment of the present invention is shown in Fig. 3.

図において、Ｕ字形の金属管（６）には、一端から第１
の光ファイバ（））が挿入されている。一方金屓管（６
）内にはオｌの光ファイバ（））が挿入された端部と反
対側の端部から第１の光ファイバ（８）が設けられてい
る。ｆｌの光ファイバ（））とオ露の光ファイバｔｓ＋
とけ、Ｕ字形の曲線部において間ＩＩ　ｆｌ（１を介し
て対向し、各々の光軸が一致するように配れ、金属管（
６１の両端部で接着部材（９）により金属管（６）に固
着されている。オ８の光ファイバ（８１の金属管（６）
の端部側の端面には反射鏡（ｌｉｔ））が設けられてい
る。光源（！りと第１の光７アイパ（７）との間には光
ファイバＱ１を介してビームスビリツタ（Ｉｇｏ）が設
けられ、ビームスビリツタ（１３１０）には光７アイノ
４０１を介して光検出器（ＩＩｌｌ）が接続されてｒる
。以上の構成において、光１ｌＡ（Ｉｌ＋から出た光は
、光ファイバーを介してビームスビリツタ（１１６）に
入シ、ビームスビリツタ（ｌｌｏ）からオｌの光ファイ
バ（７）を通り、金属管（６）内で闇１１ＱＩを通って
第３の光ファイノ（（８１に入光する。第３の先ファイ
バ園に入光した光Ｆｉ、反射鏡（■１）で反射し、再び
第１の光７アイパ（８１を通り１間ｗ−を通ってオｌの
光ファイノ（（７）へ入光し、ビームスビリツタ（１１
１６）によって光ファイバ０１を介して光検出器（ｌｌ
ａ）に入光する。したがって、金属管＋６１と光ファイ
バ！６１　（７１との熱膨張率の差異によって生じる闇
隙叫の大きさの変化によって、上記この発明の一実施例
と同様に温度の測定が実施できる。第８図の実施例では
金属管（６１と光源（１１）および光検出器（１９ｏ）
との間が、１本の光ファイバ、すなわち第１の光ファイ
バ（１）のみで行なうことができるので、光ファイバを
回転電機の筐体をガスシールＩを介して貫通させる内部
の温度測定を行なう場合には、ガスシールを施す箇所が
１ケ所のみでよくなシ被測定体側の信頓性、安全性を向
上できる。In the figure, the U-shaped metal tube (6) has a first
Optical fiber ()) is inserted. On the other hand, the metal tube (6
), a first optical fiber (8) is provided from the end opposite to the end into which the second optical fiber ()) was inserted. fl optical fiber ()) and optical fiber ts+
They are arranged so that the optical axes of the metal tubes (
Both ends of 61 are fixed to the metal tube (6) with adhesive members (9). 8 optical fibers (81 metal tubes (6)
A reflecting mirror (lit) is provided on the end face of the end portion. A beam stabilizer (Igo) is provided between the light source (!) and the first optical 7 eyeper (7) via an optical fiber Q1, and a beam stabilizer (Igo) is provided via an optical 7 eyer 401 to the beam stabilizer (1310). A photodetector (IIll) is connected to it.In the above configuration, the light emitted from the light 11A (Il+) enters the beam stabilizer (116) via the optical fiber, and is output from the beam stabilizer (llo). 1 optical fiber (7), passes through the dark 11QI in the metal tube (6), and enters the third optical fiber ((81). (■1), the first light passes through the 7-eyeper (81), passes through the 1-way w-, enters the optical fiber optic ((7)), and enters the beam stabilizer (11).
16) through the optical fiber 01 to the photodetector (ll
Light enters a). Therefore, metal tube +61 and optical fiber! 61 (71) Temperature measurement can be carried out in the same manner as in the embodiment of the present invention described above, by changing the size of the dark gap caused by the difference in thermal expansion coefficient between the metal tube (61 and light source (11) and photodetector (19o)
Since the measurement can be carried out with only one optical fiber, that is, the first optical fiber (1), it is possible to measure the internal temperature by passing the optical fiber through the casing of the rotating electrical machine via the gas seal I. If this is done, only one place is required to provide a gas seal, and reliability and safety on the part of the object to be measured can be improved.

次に、この発明の別の他の実施例を第４図に示す。図に
おいて、鋼管（６）内には光７アイパ（テ）と光７アイ
ノ４（岨とが挿入され、鋼管（６′Ｉの一端部に接着側
ｔｉｌｌを介して接合されでいる。・舅管（６）の他端
部には、光ファイバ（７）園の端面と間隙−をおいて対
向する位置にミラー０４が投けられている。このような
構成においても、鋼管（６）と光ファイバｆｉ＋　＋１
１の熱膨張係数の差から光７アイパ（７）から光プアイ
パ（８１へ入射する光量は、周囲の温度変化に対応して
変化するので、上記オ雪図の実施例と同様の効果を奏し
、周囲の電界、磁界の影響を受けないで温度の測定が可
能となる。Next, another embodiment of the present invention is shown in FIG. In the figure, a light 7 eye hole and a light 7 eye hole 4 are inserted into the steel pipe (6), and are joined to one end of the steel pipe (6'I) via the adhesive side till. A mirror 04 is provided at the other end of the pipe (6) at a position facing the end face of the optical fiber (7) with a gap in between.In such a configuration, the steel pipe (6) and optical fiber fi+ +1
Due to the difference in thermal expansion coefficient of 1, the amount of light incident from the light 7 eyeper (7) to the light eyelet (81) changes in response to changes in the surrounding temperature, so the same effect as in the example of the snow chart described above is produced. , temperature can be measured without being affected by surrounding electric or magnetic fields.

また、第５図にこの発明のさらに他の実施例を示す。図
において、鋼管（６）内にＦｉ、光７アイハ（７）が挿
入され、鋼管（６）の一端部において銅管（６）と光プ
アイパ（７）とけ接着材（９１で接合されている。＠管
ｔｅ＋の他端部には、光ファイバ（７）の端面に間隙を
おいてミラーＨが設けられている。このようなＩＩｆｔ
Ｋよっても第２図の実施例と同様の効果を奏し％周囲の
電界、磁界の影響を受けないで温度の測定が可能となる
。Further, FIG. 5 shows still another embodiment of the present invention. In the figure, Fi, Hikari 7 Aiha (7) is inserted into the steel pipe (6), and the copper pipe (6) and the Hikari 7 Aiha (7) are joined at one end of the steel pipe (6) with adhesive (91). At the other end of the tube te+, a mirror H is provided with a gap between the end face of the optical fiber (7).
K also produces the same effect as the embodiment shown in FIG. 2, making it possible to measure temperature without being influenced by surrounding electric and magnetic fields.

以上述べたように、この発明によれば、温度検出装置に
おいて牙ｌの光ファイバと第１の光ファイバとを同じ光
軸上で１！！ｌ隙を介して対向する位置に支持する上記
光ファイノ（とけ異なる熱膨張率の部材で形成された支
持部材を備え、光フアイバ間の間隙の大きさの変化によ
る牙ｌの光１′アイノ（と第３の光ファイバとの闇の光
の伝達量の変化から温度変化を検出しているので、温度
の検出が純光学的になり１回転電機の内部のような高電
界、高磁界の存在するところからノイズの影響を受けず
に温度の検出が実現できるとともに、光７アイμ間の間
隙の大きさの変化４利用してｈるので、同一部材の支持
部材を用い・でも低温から高温までの温度検出が実現で
ちる。As described above, according to the present invention, in the temperature detection device, the first optical fiber and the first optical fiber are connected to each other on the same optical axis. ! The above-mentioned optical fibers are supported at positions facing each other with a gap between them. Since the temperature change is detected from the change in the amount of dark light transmitted between the optical fiber and the third optical fiber, the temperature detection becomes purely optical, and the presence of high electric and magnetic fields such as inside a single-rotation electric machine is detected. This makes it possible to detect temperature without being affected by noise, and because it takes advantage of the change in the size of the gap between the optical 7 eyes, it is possible to detect temperatures from low to high temperatures using the same supporting member. It is possible to detect temperatures up to

【図面の簡単な説明】[Brief explanation of the drawing]

牙１図は従来例を示す略接続図、第２図けこ手続補正書
（自発） 特、１庁１く宮殿 １、事（’ｌの表示　　　　特願昭　５６−１４０１０
Ｌｔ号２、発明の名称　　　湿度検出装置 ３、補正をする者 ６、　補正の対象 明細書の発明の詳細な説明の欄 ６、　補正の内容Figure 1 is a schematic connection diagram showing a conventional example, Figure 2 is a simplified connection diagram showing a conventional example, and Figure 2 is an amendment to the procedure (voluntary).
Lt No. 2, Title of the invention Humidity detection device 3, Person making the amendment 6, Detailed description of the invention in the specification to be amended 6, Contents of the amendment

Claims (1)

【特許請求の範囲】 ＩＩ＋　　光源、この光源に接続されるオｌの光ファイ
バ、オＢの光７アイパ、これらの光ファイバとけ異なる
熱膨張率の材料で構成され上記オｌの光ファイバと上記
第２の光ファイバを間隙を介して対向する位置に支持す
る支持部材、および上記オｌの光ファイバと上記オ８の
光ファイバとの間で伝達された光を検出する検出手段を
備え、上記支持部材の熱膨張による間隙の大きさの変化
に基づいて温度を検出する温度検出装置。 （′１１　　支持部材はオｌの光ファイノ（とオ８のｉ
７アイパを収容する管状に形成されていることを特徴と
する特許請求の範囲オ１項記載の温度検出装置。[Scope of Claims] II+ A light source, an optical fiber connected to this light source, an optical fiber 7-iper connected to this light source, and an optical fiber made of a material having a different coefficient of thermal expansion than the above optical fiber. A support member for supporting the second optical fiber at opposing positions with a gap therebetween, and a detection means for detecting light transmitted between the optical fiber O and the optical fiber O, A temperature detection device that detects temperature based on a change in the size of a gap due to thermal expansion of a support member. ('11 The support member is O1's optical fiber (and O8's i
7. The temperature detecting device according to claim 1, wherein the temperature detecting device is formed into a tubular shape that accommodates 7 eyes.
JP14010281A 1981-09-04 1981-09-04 Temperature detector Pending JPS5841333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14010281A JPS5841333A (en) 1981-09-04 1981-09-04 Temperature detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14010281A JPS5841333A (en) 1981-09-04 1981-09-04 Temperature detector

Publications (1)

Publication Number Publication Date
JPS5841333A true JPS5841333A (en) 1983-03-10

Family

ID=15260982

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14010281A Pending JPS5841333A (en) 1981-09-04 1981-09-04 Temperature detector

Country Status (1)

Country Link
JP (1) JPS5841333A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8277119B2 (en) 2006-12-19 2012-10-02 Vibrosystm, Inc. Fiber optic temperature sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8277119B2 (en) 2006-12-19 2012-10-02 Vibrosystm, Inc. Fiber optic temperature sensor

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