JPH01280227A - Black body furnace - Google Patents
Black body furnaceInfo
- Publication number
- JPH01280227A JPH01280227A JP63109647A JP10964788A JPH01280227A JP H01280227 A JPH01280227 A JP H01280227A JP 63109647 A JP63109647 A JP 63109647A JP 10964788 A JP10964788 A JP 10964788A JP H01280227 A JPH01280227 A JP H01280227A
- Authority
- JP
- Japan
- Prior art keywords
- spherical
- small window
- heating body
- temperature
- radiation thermometer
- 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
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 239000011261 inert gas Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 18
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 239000011810 insulating material Substances 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 239000012212 insulator Substances 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000012777 electrically insulating material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
- G01J5/53—Reference sources, e.g. standard lamps; Black bodies
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、色温度計、輝度温度計のような輻射温度計
を校正する際に、温度の標準として利用する黒体炉に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a blackbody furnace used as a temperature standard when calibrating radiation thermometers such as color thermometers and brightness thermometers.
（従来の技術）
色温度計、輝度温度計などの輻射温度計を校正する従来
の温度標準は、第２図に示すように、セラミック・パイ
プ２１の内部に円板状の加熱物２２を挿入し、セラミッ
ク・パイプ２１の外周に電熱線２３を巻付け、円板状の
加熱物２２に温度測定用の熱電対２４を設けたものであ
る。(Prior Art) A conventional temperature standard for calibrating radiation thermometers such as color thermometers and brightness thermometers uses a disc-shaped heated object 22 inserted inside a ceramic pipe 21, as shown in FIG. A heating wire 23 is wound around the outer periphery of a ceramic pipe 21, and a thermocouple 24 for temperature measurement is provided on a disc-shaped heated object 22.
このような従来の温度標準によると、加熱体が電熱線２
３であって、円板状の加熱物２２はセラミック・パイプ
２１を介して間接的に加熱されることになるからセラミ
ック・パイプ２１の内部および加熱物２２の温度分布は
均一ではなく、特に、加熱物２２の実際の温度は、セラ
ミック番バイブ２１の温度よりも低くなり、温度むらを
生じる。According to such conventional temperature standards, the heating element is the heating wire 2
3, since the disk-shaped heating object 22 is indirectly heated through the ceramic pipe 21, the temperature distribution inside the ceramic pipe 21 and the heating object 22 is not uniform, and in particular, The actual temperature of the heated object 22 is lower than the temperature of the ceramic vibrator 21, resulting in temperature unevenness.
熱電対２４によって測定される温度は、加熱物２２自体
の温度であるのにも拘らず、加熱物２２はセラミツクー
パイブ２１の内表面から輻射されるエネルギーの反射体
にもなるので、校正すべき輻射温度計の視野を加熱物２
２に合わると、輻射温度計に入射するエネルギーは、加
熱物２２の表面から輻射される本来のエネルギーのほか
に、高温度のセラミック会パイプ２１の内表面から輻射
されて加熱物２２の表面で反射されたエネルギーも加わ
るので、輻射温度計は、熱電対２４で測定した加熱物２
２の実際の温度よりも高い温度で校正されたことになる
。Although the temperature measured by the thermocouple 24 is the temperature of the heated object 22 itself, the heated object 22 also serves as a reflector of the energy radiated from the inner surface of the ceramic coupe 21, so calibration is not necessary. The field of view of the radiation thermometer should be heated object 2.
2, the energy incident on the radiation thermometer is not only the original energy radiated from the surface of the heated object 22, but also the energy radiated from the inner surface of the high-temperature ceramic pipe 21 to the surface of the heated object 22. Since the energy reflected by the radiation thermometer is also added, the radiation thermometer is
This means that the calibration was performed at a higher temperature than the actual temperature of No.2.
また、校正すべき輻射温度計の視野が、加熱物２２の中
心から外れて、視野の一部に高温度のセラミック・バイ
ブ２１の内表面が入ると、輻射温度計に入射するエネル
ギーの強度が増すので１校正に際して、輻射温度計の視
野の中心と加熱物２２の中心とを正確に一致させなけれ
ば、温度指示に誤差を生じる。Additionally, if the field of view of the radiation thermometer to be calibrated deviates from the center of the heated object 22 and the inner surface of the high-temperature ceramic vibe 21 enters a part of the field of view, the intensity of the energy incident on the radiation thermometer will increase. Therefore, if the center of the field of view of the radiation thermometer and the center of the heated object 22 are not accurately aligned during one calibration, an error will occur in the temperature indication.
（発明が解決しようとする課題）
このような従来の黒体炉においては、温度分布の不均一
性および校正すべき輻射温度計に入射するエネルギー強
度と加熱物の実際の温度とが正確に対応しないという問
題があった。(Problems to be Solved by the Invention) In such a conventional blackbody furnace, the non-uniformity of the temperature distribution and the fact that the energy intensity incident on the radiation thermometer to be calibrated accurately corresponds to the actual temperature of the heated object. The problem was that it didn't.
（課題を解決するための手段）
そこで、この発明は、このような問題点を解決するため
に、加熱物を球状に形成し、この球状の加熱物の内表面
積に比して、エネルギーを取り出す小窓の開口面積を著
しく小さくするとともに、球状の加熱物を全体にわたっ
て均一に加熱するように、加熱ヒータを配置したもので
ある。(Means for Solving the Problems) Therefore, in order to solve such problems, the present invention forms a heated object into a spherical shape, and extracts energy relative to the inner surface area of this spherical heated object. The opening area of the small window is significantly reduced, and heaters are arranged so as to uniformly heat the entire spherical heating object.
（実施例）
第１図の断面図に示すように、炭化硅素のような黒色で
放射率がよく、そして熱伝導性のよい材料によって、厚
みが均一でポーラスな小窓５を有する球体ｌを作り、こ
の球体ｌの表面に、アルミナのような電気的絶縁材料で
ポーラスな被覆２を形成し、この被覆２の表面に加熱用
のモリブデン線またはタングステン線のような高温度の
発熱が可能な電熱線３を巻き付けたのち、この電熱ｋＱ
３を覆うように、アルミナのような電気的絶縁材料でポ
ーラスな被覆４を施して球状の加熱物１２を形成する。(Example) As shown in the cross-sectional view of FIG. 1, a sphere l having a uniform thickness and porous small windows 5 is made of a black material such as silicon carbide, which has good emissivity and good thermal conductivity. A porous coating 2 is formed on the surface of this sphere l using an electrically insulating material such as alumina, and a high-temperature heat generating material such as molybdenum wire or tungsten wire for heating is formed on the surface of this coating 2. After wrapping heating wire 3, this electric heating kQ
A spherical heating element 12 is formed by applying a porous coating 4 of an electrically insulating material such as alumina to cover the heating element 3 .
さらに、球体１の実際の温度を測定するための熱電対１
４が、球体ｌの内表面に設けられている。Furthermore, a thermocouple 1 for measuring the actual temperature of the sphere 1
4 is provided on the inner surface of the sphere l.
この球状の加熱物１２を、小窓８および給気孔９を有す
る箱７に収納し、球状の加熱物１２と箱７との隙間にア
ルミナの粉、ロック・ウールなどの断熱材６を充填する
。This spherical heating object 12 is stored in a box 7 having a small window 8 and an air supply hole 9, and the gap between the spherical heating object 12 and the box 7 is filled with a heat insulating material 6 such as alumina powder or rock wool. .
そして１箱７の小窓８は、不使用時にキャップ１０によ
って密閉される。The small window 8 of each box 7 is sealed with a cap 10 when not in use.
（作用）
小窓８のキャップ１０を外し、箱７の給気孔９よリアル
ボン・ガスのような不活性ガスを供給しながら電熱線３
に通電すると、球状の加熱物１２が加熱されて、加熱物
１２の温度が上昇する。(Function) Remove the cap 10 of the small window 8 and connect the heating wire 3 while supplying an inert gas such as realbon gas through the air supply hole 9 of the box 7.
When energized, the spherical heating object 12 is heated and the temperature of the heating object 12 increases.
このとき、給気孔９より供給された不活性ガスは、断熱
材６およびポーラスな球状の加熱物１２の壁面を経て加
熱物１２の中に入り、そして、小窓５および８より外部
へ放出され、空気中の酸素による電熱線３の焼損を防ぐ
。At this time, the inert gas supplied from the air supply hole 9 enters the heating object 12 through the insulation material 6 and the wall surface of the porous spherical heating object 12, and is then released to the outside through the small windows 5 and 8. , to prevent burning of the heating wire 3 due to oxygen in the air.
校正すべき輻射温度計の視野を小窓８を経て、球状の加
熱物１２の内表面に指向させると、球状の加熱物１２の
内表面から輻射されたエネルギーを輻射温度計の受光部
に入射させることができる。When the field of view of the radiation thermometer to be calibrated is directed to the inner surface of the spherical heated object 12 through the small window 8, the energy radiated from the inner surface of the spherical heated object 12 is incident on the light receiving part of the radiation thermometer. can be done.
（効果）
球状の加熱物１２の内表面積に比べて、小窓８の開口面
積を著しく小さくしておくと、球状の加熱物１２の内表
面の温度を可及的に均一に保っておく限り、校正すべき
輻射温度計の視野が、球状の加熱物１２の内表面のどこ
を向いても、指示する温度は一定である。(Effect) If the opening area of the small window 8 is made significantly smaller than the inner surface area of the spherical heated object 12, as long as the temperature of the inner surface of the spherical heated object 12 is kept as uniform as possible. No matter where on the inner surface of the spherical heated object 12 the field of view of the radiation thermometer to be calibrated is directed, the indicated temperature is constant.
すなわち、校正すべき輻射温度計の視野内の加熱物１２
の内表面からは、視野内の内表面で輻射される本来のエ
ネルギーのほかに、視野外の他の内表面から輻射され、
視野内の内表面で反射されたエネルギーも加わるが、こ
の反射されたエネルギーも、同じ温度の他の内表面から
輻射されたものであるから、校正すべき輻射温度計に入
射するエネルギーは同じであって、指示温度に全く影響
しない。That is, the heated object 12 within the field of view of the radiation thermometer to be calibrated
In addition to the original energy radiated from the inner surface within the field of view, energy is radiated from the inner surface of the
The energy reflected from the inner surface within the field of view is also added, but since this reflected energy is also radiated from other inner surfaces at the same temperature, the energy incident on the radiation thermometer to be calibrated is the same. Therefore, it does not affect the indicated temperature at all.
また、小窓８にガラス板を設けると、加熱時に各種の物
質から発生した蒸気が、ガラス板の表面に凝縮し、輻射
されたエネルギーのうちの一部のエネルギーを吸収する
ので、加熱物１２の内表面の温度に対応した輻射エネル
ギーを取り出すことができない。Furthermore, if a glass plate is provided in the small window 8, steam generated from various substances during heating will condense on the surface of the glass plate and absorb some of the radiated energy. It is not possible to extract radiant energy corresponding to the temperature of the inner surface of the
しかし、この発明の黒体炉においては、校正動作中、小
窓８を完全に開き、フィルタ作用をするガラスのような
物質を介在させていないので、熱電対１４で測定した加
熱物１２の内表面の温度に対応した輻射エネルギーを取
り出すことができる。However, in the blackbody furnace of the present invention, during the calibration operation, the small window 8 is completely opened and there is no substance such as glass that acts as a filter. Radiant energy corresponding to the surface temperature can be extracted.
なお、小窓８は、不使用時にキャップ１０によって密閉
され、箱７内に空気が流入するのを防止する。Note that the small window 8 is sealed with a cap 10 when not in use to prevent air from flowing into the box 7.
第１図は、この発明の黒体炉の一実施例を示す断面図、
第２図は、従来の黒体炉の一例を示す断面図である。
３・・・電熱線
５．８・・・小窓
６・・・断熱材
７・・・箱
９・・・給気孔
１２・・・球状の加熱物
１４・・・熱電対FIG. 1 is a sectional view showing an embodiment of a blackbody furnace of the present invention;
FIG. 2 is a sectional view showing an example of a conventional blackbody furnace. 3... Heating wire 5.8... Small window 6... Insulating material 7... Box 9... Air supply hole 12... Spherical heating object 14... Thermocouple
Claims (3)
熱物を全体にわたって可及的に均一に加熱する加熱ヒー
タと、上記球状の加熱物の内表面積に比して、開口面積
が小さく、上記球状の加熱物の内表面から輻射されるエ
ネルギーを取り出す上記球状の加熱物に設けられた小窓
とを具備することを特徴とする黒体炉。(1) A spherical heated object with a relatively black inner surface, a heater that heats the spherical heated object as uniformly as possible over the entire surface, and an opening area that is larger than the inner surface area of the spherical heated object. 1. A blackbody furnace comprising: a small window provided in the spherical heating object for extracting energy radiated from the inner surface of the spherical heating object.
とする特許請求の範囲第１項に記載の黒体炉。(2) The blackbody furnace according to claim 1, wherein the wall surface of the spherical heated object is breathable.
し、上記給気孔より供給された不活性ガスを上記球状の
加熱物の壁面を経て小窓より外部に放出させるように構
成したことを特徴とする特許請求の範囲第２項に記載の
黒体炉。(3) A box containing a spherical heating object and having an air supply hole is configured, and the inert gas supplied from the air supply hole is discharged to the outside through a small window through the wall of the spherical heating object. A blackbody furnace according to claim 2, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63109647A JPH01280227A (en) | 1988-05-06 | 1988-05-06 | Black body furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63109647A JPH01280227A (en) | 1988-05-06 | 1988-05-06 | Black body furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01280227A true JPH01280227A (en) | 1989-11-10 |
Family
ID=14515589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63109647A Pending JPH01280227A (en) | 1988-05-06 | 1988-05-06 | Black body furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01280227A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271578A (en) * | 2006-03-31 | 2007-10-18 | Seiko Npc Corp | Infrared sensor measurement device |
| JP2010112862A (en) * | 2008-11-07 | 2010-05-20 | Seiko Npc Corp | Blackbody furnace |
| US7866882B2 (en) * | 2007-02-13 | 2011-01-11 | Industrial Technology Research Institute | Standard radiation source |
| JP2011215155A (en) * | 2011-06-15 | 2011-10-27 | Seiko Npc Corp | Infrared sensor measuring device |
| CN114858289A (en) * | 2022-07-07 | 2022-08-05 | 深圳市兆兴博拓科技股份有限公司 | Infrared sensing testing device |
-
1988
- 1988-05-06 JP JP63109647A patent/JPH01280227A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007271578A (en) * | 2006-03-31 | 2007-10-18 | Seiko Npc Corp | Infrared sensor measurement device |
| US7866882B2 (en) * | 2007-02-13 | 2011-01-11 | Industrial Technology Research Institute | Standard radiation source |
| JP2010112862A (en) * | 2008-11-07 | 2010-05-20 | Seiko Npc Corp | Blackbody furnace |
| JP2011215155A (en) * | 2011-06-15 | 2011-10-27 | Seiko Npc Corp | Infrared sensor measuring device |
| CN114858289A (en) * | 2022-07-07 | 2022-08-05 | 深圳市兆兴博拓科技股份有限公司 | Infrared sensing testing device |
| CN114858289B (en) * | 2022-07-07 | 2022-10-04 | 深圳市兆兴博拓科技股份有限公司 | Infrared sensing testing device |
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