JPH0452659Y2 - - Google Patents
Info
- Publication number
- JPH0452659Y2 JPH0452659Y2 JP8996287U JP8996287U JPH0452659Y2 JP H0452659 Y2 JPH0452659 Y2 JP H0452659Y2 JP 8996287 U JP8996287 U JP 8996287U JP 8996287 U JP8996287 U JP 8996287U JP H0452659 Y2 JPH0452659 Y2 JP H0452659Y2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- black body
- cavity
- temperature
- sensor probe
- 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.)
- Expired
Links
- 239000013307 optical fiber Substances 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 8
- 239000000523 sample Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 4
- 229910052594 sapphire Inorganic materials 0.000 description 4
- 239000010980 sapphire Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000005457 Black-body radiation Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
Description
【考案の詳細な説明】
＜産業上の利用分野＞
本考案は、先端に黒体を持つ光フアイバを用い
た温度計のセンサプローブに関するものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a sensor probe for a thermometer that uses an optical fiber having a blackbody at its tip.
＜従来の技術＞
第２図は従来のこの種の光フアイバ温度計の一
例を示すものである。図において、２１は黒体、
２２はサフアイヤフアイバ、２３はガラスフアイ
バ、２４は温度変換部で、黒体２１とサフアイヤ
フアイバ２２とガラスフアイバ２３とでセンサプ
ローブ２５を構成している。黒体２１はサフアイ
ヤフアイバ２２の先端に作られ、その黒体２１か
ら放射される放射光をサフアイヤフアイバ２２と
ガラスフアイバ２３によつて温度変換部２４内に
伝送され、ここで前記放射光の強度より黒体２１
の温度が求められる。第２図のＣ部は黒体２１を
拡大して描いたもので、サフアイヤフアイバ２２
の先端にIr（インジウム）とAl2O3をスパツタする
ことによりIrフイルム３１とAl2O3フイルム３２
を形成したものである。<Prior Art> FIG. 2 shows an example of a conventional optical fiber thermometer of this type. In the figure, 21 is a black body,
22 is a sapphire fiber, 23 is a glass fiber, and 24 is a temperature converter. The black body 21, the sapphire fiber 22, and the glass fiber 23 constitute a sensor probe 25. A black body 21 is made at the tip of a sapphire fiber 22, and the radiated light emitted from the black body 21 is transmitted through the sapphire fiber 22 and glass fiber 23 into a temperature converter 24, where the radiated light is From the intensity of black body 21
The temperature of Section C in Figure 2 is an enlarged drawing of the black body 21, and the
By sputtering Ir (indium) and Al 2 O 3 on the tips of the Ir film 31 and Al 2 O 3 film 32
was formed.
＜考案が解決しようとする問題点＞
このような光フアイバ温度計は、黒体放射の原
理を使用するため高温測定には適するが、例えば
150〜500℃程度の低温の測定では、光強度が弱い
ため測定の応答が遅くなるという問題点があつ
た。<Problems to be solved by the invention> This kind of optical fiber thermometer uses the principle of black body radiation, so it is suitable for high temperature measurement, but for example
When measuring low temperatures of about 150 to 500 degrees Celsius, there was a problem that the measurement response was slow due to the weak light intensity.
＜問題点を解決するための手段＞
本考案はこのような問題点を改良し、低温でも
応答性の良い光フアイバ温度計を実現するために
なされたもので、細いガラス棒の先端に気体を封
入し、その側面を黒色コーテイングした黒体と
し、その黒体より放射された放射光を光フアイバ
により温度変換部内に伝送するように構成したも
のである。<Means for solving the problems> The present invention was made to improve these problems and realize an optical fiber thermometer with good response even at low temperatures. A black body is enclosed and its side surfaces are coated with black, and the light emitted from the black body is transmitted into the temperature converter through an optical fiber.
以下、実施例について本考案を説明する。 The present invention will be described below with reference to examples.
＜実施例＞
第１図は本考案に係る光フアイバ温度計の一実
施例の構成図である。第１図において、１はガラ
ス棒、２は光フアイバ、３は温度変換部で、ガラ
ス棒１と光フアイバ２とでセンサプローブ４を構
成している。第１図のＡ部は、ガラス棒１の先端
部を拡大して描いたものである。Ａ部に示すよう
に、ガラス棒１の先端付近に空洞１１を設け、そ
の空洞１１の内側の面に黒色コーテイングＢを施
すことによつて黒体１２を構成している。この黒
体１２によつてガラス棒１の先端付近の温度に対
応した放射輝度を持つ放射光が放射され、光フア
イバ２によつて温度変換部３内に伝送され、ここ
で温度に変換される。ここで、空洞１内には赤外
線の吸収の良いCO2等の気体を封入している。ま
た、ガラス棒１と光フアイバ２は赤外光の透過を
良くするために石英ガラスを用いる。これは低温
測定においては赤外領域の放射光が測定に使用さ
れるからである。さて、赤外光では一般に金属は
光の吸収が悪く、輻射伝熱によつて第２図に示す
ようなセンサプローブ２５の先端が暖まりにくい
欠点があるが、本考案によれば、第１図に示すよ
うに黒体１２の周囲に赤外線吸収の良い気体を封
入することにより効率良く輻射熱を吸収すること
によつて低温でも応答性の良い光フアイバ温度計
のセンサプローブとなる。<Example> FIG. 1 is a configuration diagram of an example of an optical fiber thermometer according to the present invention. In FIG. 1, 1 is a glass rod, 2 is an optical fiber, and 3 is a temperature converter. The glass rod 1 and the optical fiber 2 constitute a sensor probe 4. Section A in FIG. 1 is an enlarged view of the tip of the glass rod 1. As shown in part A, a cavity 11 is provided near the tip of the glass rod 1, and a black body 12 is constructed by applying a black coating B to the inner surface of the cavity 11. Radiant light having a radiance corresponding to the temperature near the tip of the glass rod 1 is emitted by the black body 12, and is transmitted through the optical fiber 2 into the temperature converter 3, where it is converted into temperature. . Here, the cavity 1 is filled with a gas such as CO 2 which has good absorption of infrared rays. Further, the glass rod 1 and the optical fiber 2 are made of quartz glass in order to improve the transmission of infrared light. This is because radiation in the infrared region is used for low temperature measurements. Now, in general, metals have poor absorption of infrared light, and have the disadvantage that the tip of the sensor probe 25 as shown in Fig. 2 is difficult to warm up due to radiant heat transfer. As shown in FIG. 2, by sealing a gas with good infrared absorption around the black body 12, the sensor probe of the optical fiber thermometer has good responsiveness even at low temperatures by efficiently absorbing radiant heat.
＜考案の効果＞
以上説明したように、従来、低温域での測定が
難しかつた光フアイバ温度計で、本考案のような
センサプローブを用いることにより、効率良く周
囲からの輻射熱を集め、応答良く雰囲気温度を測
定することができるようになつた。<Effects of the invention> As explained above, by using the sensor probe of the present invention, optical fiber thermometers, which have conventionally been difficult to measure in low-temperature ranges, can efficiently collect radiant heat from the surroundings and respond. It has become possible to measure the ambient temperature well.
第１図は本考案に係る光フアイバ温度計の一実
施例を示す構成図、第２図は従来の光フアイバ温
度計の構成図である。
１……ガラス棒、２……光フアイバ、３……温
度変換部、４……センサプローブ、１１……空
洞、１２……黒体、Ｂ……黒色コーテイング。
FIG. 1 is a block diagram showing an embodiment of an optical fiber thermometer according to the present invention, and FIG. 2 is a block diagram of a conventional optical fiber thermometer. DESCRIPTION OF SYMBOLS 1...Glass rod, 2...Optical fiber, 3...Temperature converter, 4...Sensor probe, 11...Cavity, 12...Black body, B...Black coating.
Claims (1)
側面に黒色コーテイングを施して黒体とすると共
に、前記空洞内に赤外線の吸収率の高い気体を封
入して成る光フアイバー温度計用センサプロー
ブ。 This sensor probe for an optical fiber thermometer is made by providing a cavity near the tip of a glass rod, applying a black coating to the inner surface of the cavity to form a black body, and filling the cavity with a gas having a high absorption rate of infrared rays.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8996287U JPH0452659Y2 (en) | 1987-06-11 | 1987-06-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8996287U JPH0452659Y2 (en) | 1987-06-11 | 1987-06-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63199034U JPS63199034U (en) | 1988-12-21 |
| JPH0452659Y2 true JPH0452659Y2 (en) | 1992-12-10 |
Family
ID=30949416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8996287U Expired JPH0452659Y2 (en) | 1987-06-11 | 1987-06-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452659Y2 (en) |
-
1987
- 1987-06-11 JP JP8996287U patent/JPH0452659Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63199034U (en) | 1988-12-21 |
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