JPS6049849B2 - Device for measuring surface temperature and emissivity of objects - Google Patents
Device for measuring surface temperature and emissivity of objectsInfo
- Publication number
- JPS6049849B2 JPS6049849B2 JP55106294A JP10629480A JPS6049849B2 JP S6049849 B2 JPS6049849 B2 JP S6049849B2 JP 55106294 A JP55106294 A JP 55106294A JP 10629480 A JP10629480 A JP 10629480A JP S6049849 B2 JPS6049849 B2 JP S6049849B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- radiant energy
- radiometer
- emissivity
- measured
- 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
- 230000005855 radiation Effects 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
Description
【発明の詳細な説明】
本発明は、加熱鋼板などの被測温物体の表面温度と放射
率を同時に放射測温する装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for simultaneously measuring the surface temperature and emissivity of an object to be measured, such as a heated steel plate.
被測温物体に黒体炉と放射計を、該黒体炉からの放射エ
ネルギが該物体表面で鏡面反射して放射計に入力するよ
うに配置し、また黒体炉の前方に回転セクタを置いて放
射エネルギを断続させ、該放射エネルギを通した場合と
遮蔽した場合の放射計の各出力から該物体の放射率と温
度を測定する方式がある。しかしこの方式では黒体炉と
放射計を上記の位置関係に設置するのに手間がか）り、
高速で移動する鋼板の温度を測定するような場合には、
装置の交換や運転中の保守の面などから問題なしとしな
い。また移動に伴う測定面のうねりによつて光軸がずれ
、測定結果に誤差を生じるという問題もある。本発明は
このような問題点を克服して容易に正確な放射測温を可
能にする装置を提供しようとするものであり、その特徴
とする所は被測温物体に対向させて放射源を配置し、こ
れらの間に放射源からの放射エネルギを断続させる回転
セクタと、被測温物体からの放射エネルギを放射計へ導
くビームスプリッタを設け更に該回転セクタが放射エネ
ルギを遮断したとき及びこれを通過させたときの該放射
計の各出力から物体の温度および放射率を算出する演算
装置を配設してなる点にある。A blackbody furnace and a radiometer are arranged on the temperature-measuring object so that the radiant energy from the blackbody furnace is specularly reflected on the surface of the object and input to the radiometer, and a rotating sector is placed in front of the blackbody furnace. There is a method in which the emissivity and temperature of the object are measured from the outputs of the radiometer when the radiant energy is passed through and when the radiant energy is blocked. However, with this method, it takes time and effort to install the blackbody reactor and radiometer in the above positional relationship.
When measuring the temperature of a steel plate moving at high speed,
We do not assume that there will be any problems in terms of equipment replacement or maintenance during operation. There is also the problem that the optical axis shifts due to the undulation of the measurement surface due to movement, causing errors in measurement results. The present invention aims to overcome these problems and provide a device that makes it possible to easily and accurately measure radiation temperature.The present invention is characterized by the fact that the radiation source is placed opposite the object to be measured. A rotating sector that intermittents the radiant energy from the radiation source and a beam splitter that guides the radiant energy from the object to be measured to the radiometer are provided between them. The point is that an arithmetic device is provided to calculate the temperature and emissivity of an object from each output of the radiometer when the object passes through the object.
以下図面を参照しながらこれを詳細に説明する。第１図
で１０は炉壁てあり、１２は被測温物体本例ては加熱ス
トリップてある。炉は本例ては焼鈍炉であり、そして背
光雑音を可及的に小にするため測温部分は図示の如く周
囲の炉壁を接近させ、かつ透光窓１４の周囲の炉壁には
水冷盤１６−を設けてある。この透光窓１４上にビーム
スプリッタ（またはハーフミラー）２２、回転セクタ２
０、および黒体炉１８を順次設置し、また放射計２４を
ビームスプリッタ２２に対面させて設置する。この配置
によれは図示の如く黒体炉１８からフ出た放射エネルギ
琢は回転セクタ２０およびビームスプリッタ２２を通つ
て物体１２の表面に投射され、該表面で正反射して上記
光路を戻り、ビームスプリッタで一部が反射計２４に入
力する。また物体１２から放出された放射エネルギＢ２
５も、ビームスプリッタ２２で一部が反射して放射計２
４に入射する。なおビームスプリッタ２２を透過した放
射エネルギは回転セクタ２０を通つて黒体炉１８へ入り
、吸収される。上記は放射エネルギＢ１が回転セクタ２
０で遮断されずにこれを通過した場合であるが、回転セ
クタで遮断されると放射計２４に入力するのは放射エネ
ルギ八のうちビームスプリッタ２２で反射した分のみと
なる。このような状況から、下式が成立する。こ）でＥ
１は回転セクタが放射エネルギＢ１を遮断している場合
、Ｅ２は通過させている場合の放射計の各検出工ネルギ
、Ｔ１およびＥは物体１２の温度および放射率、Ｔ２は
黒体炉の温度、ｒおよび（１−ｒ）はビームスプリッタ
の放射率および透過率である。また（１−ε）は物体１
２の表面が鏡面である場合の理想的反射率であり、実際
には物体表面は粗面であるのでこれより少なくなりｓ係
数をｆ（０〈ｆく１）としてｆ（１−ε）とすべきもの
である。なお放射率Ｅは入射角に応じて変り、本例では
入射は法線方向でなされるので入射角０における値をい
う。（１）（２）式から次式が−得られ、この（３），
（４）式より物体１２の放射率Ｅおよび温度Ｔ１が求ま
る。This will be explained in detail below with reference to the drawings. In FIG. 1, 10 is a furnace wall, and 12 is an object whose temperature is to be measured, in this example a heating strip. The furnace in this example is an annealing furnace, and in order to minimize backlight noise, the temperature measuring part is placed close to the surrounding furnace walls as shown in the figure, and the furnace walls around the transparent window 14 are A water cooling plate 16- is provided. A beam splitter (or half mirror) 22 and a rotating sector 2 are placed on this transparent window 14.
0 and the blackbody furnace 18 are installed one after another, and the radiometer 24 is installed facing the beam splitter 22. With this arrangement, as shown in the figure, the radiant energy emitted from the blackbody furnace 18 is projected onto the surface of the object 12 through the rotating sector 20 and the beam splitter 22, specularly reflected from the surface, and returned along the optical path. A portion of the light is input to the reflectometer 24 by the beam splitter. Also, the radiant energy B2 emitted from the object 12
5 is also partially reflected by the beam splitter 22 and is reflected by the radiometer 2.
4. Note that the radiant energy transmitted through the beam splitter 22 enters the blackbody furnace 18 through the rotating sector 20 and is absorbed. In the above example, radiant energy B1 is transmitted to rotating sector 2.
If the beam passes through this without being blocked by the rotating sector, only the portion of the radiant energy reflected by the beam splitter 22 will be input to the radiometer 24 if the beam is blocked by the rotating sector. From this situation, the following formula holds true. E in this)
1 is the detection energy of the radiometer when the rotating sector blocks the radiant energy B1, E2 is the detection energy of the radiometer when the rotating sector is passing the radiant energy B1, T1 and E are the temperature and emissivity of the object 12, and T2 is the temperature of the blackbody furnace. , r and (1-r) are the emissivity and transmittance of the beam splitter. Also, (1-ε) is the object 1
This is the ideal reflectance when the surface of 2 is a mirror surface.In reality, the surface of the object is a rough surface, so it is less than this, and the s coefficient is f(0<f × 1) and f(1-ε). It is something that should be done. Note that the emissivity E changes depending on the angle of incidence, and in this example, since the incidence is in the normal direction, it refers to the value at an angle of incidence of 0. The following equation is obtained from equations (1) and (2), and this (3),
The emissivity E and temperature T1 of the object 12 are determined from equation (4).
２６はその演算を行なう装置である。26 is a device that performs the calculation.
このε，Ｔ１の演算で用いるＥｂ（Ｔ２）は黒体炉１８
の温度Ｔ２を測定してＴ上ｂ（Ｔ）変換してもよく、あ
るいは放射計２４て直接測定してもよい（これは例えば
放射計２４をビームスプリッタ２２に対し図面とは反対
の位置へ移動させれは可能てある）。この方式によれば
、黒体炉および放射計の光軸一が測定面法線にとつてあ
るため、測定面のうねりによる光軸のずれの影響が小さ
く、従つて正確な測温が可能である。Eb (T2) used in the calculation of ε, T1 is the blackbody furnace 18
The temperature T2 may be measured and converted to b(T) over T, or it may be measured directly using the radiometer 24 (this may be done, for example, by moving the radiometer 24 to the opposite position relative to the beam splitter 22 as shown in the drawing). (It is possible to move it.) According to this method, the optical axes of the blackbody furnace and radiometer are aligned with the normal line of the measurement surface, so there is little effect of deviation of the optical axis due to waviness of the measurement surface, and therefore accurate temperature measurement is possible. be.
また光軸合せに時間を取らずに済むため、装置の交換や
保守の面からも使用し易いという利点がある。この測温
装置は黒体炉１８を反射鏡に変えてもよい。Furthermore, since it does not take much time to align the optical axes, there is an advantage that the device is easy to use in terms of replacement and maintenance. In this temperature measuring device, the black body furnace 18 may be replaced with a reflecting mirror.
第２図を参照して説明するにこの場合の放射エネルギＢ
１の経路は、被測温物体１２から始つてビームスプリッ
タ２２、回転セクタ２０、反射鏡１８″と続き、この反
射鏡で正反射して今来た経路を戻り、被測温物体１２の
表面て正反射し”てビームスプリッタ２２へ至り、こ）
で一部が反射して放射計２４へ入力する。つまり反射鏡
は受動的ながら黒体炉１８と同様な放射源となる。この
場今の前記（１）〜（４）式は次の如くなる。但しＲｍ
は反射鏡の反射率以上説明したように本発明によれば、
取付け、保守が極めて容易な放射測温装置が得られる。The radiant energy B in this case will be explained with reference to FIG.
Path 1 starts from the object to be measured 12, continues through the beam splitter 22, the rotating sector 20, and the reflecting mirror 18'', and is regularly reflected by this reflecting mirror to return along the path that was just taken, and then return to the surface of the object to be measured 12. It is specularly reflected and reaches the beam splitter 22.)
A part of the light is reflected and input into the radiometer 24. In other words, the reflector serves as a radiation source similar to the blackbody furnace 18, although it is passive. The current equations (1) to (4) are as follows. However, Rm
is the reflectance of the reflecting mirror.As explained above, according to the present invention,
A radiation temperature measurement device that is extremely easy to install and maintain can be obtained.
また透光窓の周囲を水冷盤つまり放出する放射エネルギ
が測温無視できる低温部材で覆い被測温物体を充分これ
に近付ければ該物体が炉内物体であつても背光雑音の影
響なく高精度の測温が可能である。なお図示の如き配置
は炉と炉の間のスロート部を利用したりすると簡単に実
現できる。In addition, if the area around the light-transmitting window is covered with a water-cooled plate, that is, a low-temperature material whose radiant energy emitted can be ignored by the temperature measurement, and the object to be temperature measured is placed sufficiently close to the water-cooled plate, even if the object is inside the furnace, the temperature will be high without being affected by backlight noise. Accurate temperature measurement is possible. Note that the arrangement as shown in the figure can be easily realized by using the throat section between the furnaces.
第１図および第２図は本発明の実施例を示す説明図てあ
る。
図て１２は被測温物体、１８及ひ１『は放射源、２０は
回転セクタ、２２はビームスプリッタ、２４は放射計、
２６は演算装置てある。FIGS. 1 and 2 are explanatory diagrams showing an embodiment of the present invention. In the figure, 12 is the temperature object to be measured, 18 and 1' are the radiation sources, 20 is the rotating sector, 22 is the beam splitter, 24 is the radiometer,
26 is an arithmetic unit.
Claims (1)
間に放射源からの放射エネルギを断続させる回転セクタ
と、被測温物体からの放射エネルギを放射計へ導くビー
ムスプリッタを設け更に該回転セクタが放射エネルギを
遮断したとき及びこれを通過させたときの該放射計の各
出力から物体の温度および放射率を算出する演算装置を
配設してなることを特徴とする物体の表面温度と放射率
の測定装置。1. A radiation source is placed facing the object to be measured, and a rotating sector that intermittents the radiant energy from the radiation source and a beam splitter that guides the radiant energy from the object to be measured to the radiometer are provided between them. A surface of an object, characterized in that a calculation device is provided for calculating the temperature and emissivity of the object from each output of the radiometer when the rotating sector blocks radiant energy and when the radiant energy passes through it. Temperature and emissivity measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55106294A JPS6049849B2 (en) | 1980-08-01 | 1980-08-01 | Device for measuring surface temperature and emissivity of objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55106294A JPS6049849B2 (en) | 1980-08-01 | 1980-08-01 | Device for measuring surface temperature and emissivity of objects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5730916A JPS5730916A (en) | 1982-02-19 |
| JPS6049849B2 true JPS6049849B2 (en) | 1985-11-05 |
Family
ID=14430019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55106294A Expired JPS6049849B2 (en) | 1980-08-01 | 1980-08-01 | Device for measuring surface temperature and emissivity of objects |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049849B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503062A (en) * | 1987-03-25 | 1990-09-27 | テニス ツーター インコーポレーテッド | Portable power-driven pitching device |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4881823A (en) * | 1988-03-29 | 1989-11-21 | Purdue Research Foundation | Radiation thermometry |
| US5310260A (en) * | 1990-04-10 | 1994-05-10 | Luxtron Corporation | Non-contact optical techniques for measuring surface conditions |
| US5154512A (en) * | 1990-04-10 | 1992-10-13 | Luxtron Corporation | Non-contact techniques for measuring temperature or radiation-heated objects |
| US5769540A (en) * | 1990-04-10 | 1998-06-23 | Luxtron Corporation | Non-contact optical techniques for measuring surface conditions |
| US5443315A (en) * | 1993-12-16 | 1995-08-22 | Texas Instruments Incorporated | Multi-zone real-time emissivity correction system |
| US5505543A (en) * | 1994-01-21 | 1996-04-09 | The Boeing Company | Emissivity measurement apparatus and method |
| DE19513749B4 (en) * | 1995-04-11 | 2004-07-01 | Infineon Technologies Ag | Method and device for determining the emission factor of semiconductor materials by irradiation with electromagnetic waves |
| CN103674888B (en) * | 2013-12-24 | 2015-11-11 | 哈尔滨工业大学 | High temperature semitransparent material spectrum direction apparent emissivity backstepping measurement mechanism and method |
| JP6620827B2 (en) * | 2017-04-14 | 2019-12-18 | Ｊｆｅスチール株式会社 | Radiation temperature measuring device and radiation temperature measuring method |
| CN115265825B (en) * | 2022-07-06 | 2024-04-16 | 东北大学 | Method and device for measuring temperature of inner surface, storage medium and terminal |
-
1980
- 1980-08-01 JP JP55106294A patent/JPS6049849B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02503062A (en) * | 1987-03-25 | 1990-09-27 | テニス ツーター インコーポレーテッド | Portable power-driven pitching device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5730916A (en) | 1982-02-19 |
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