JPS6140053B2 - - Google Patents
Info
- Publication number
- JPS6140053B2 JPS6140053B2 JP54110706A JP11070679A JPS6140053B2 JP S6140053 B2 JPS6140053 B2 JP S6140053B2 JP 54110706 A JP54110706 A JP 54110706A JP 11070679 A JP11070679 A JP 11070679A JP S6140053 B2 JPS6140053 B2 JP S6140053B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- furnace
- furnace temperature
- slab
- thermal emissivity
- 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
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
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
- G01J5/14—Electrical features thereof
- G01J5/16—Arrangements with respect to the cold junction; Compensating influence of ambient temperature or other variables
-
- 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
- G01J5/0037—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids
- G01J5/004—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the heat emitted by liquids by molten metals
-
- 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
- G01J5/0044—Furnaces, ovens, kilns
-
- 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
- G01J5/80—Calibration
- G01J5/802—Calibration by correcting for emissivity
-
- 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
- G01J5/90—Testing, inspecting or checking operation of radiation pyrometers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
Description
【発明の詳細な説明】
本発明は不確定要素に影響されずに被加熱体の
温度を正確に予測する加熱炉における被加熱体の
温度予測装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature prediction device for a heated object in a heating furnace that accurately predicts the temperature of the heated object without being affected by uncertain factors.
従来、加熱炉におけるスラブの温度予測方式
は、第１図に示すようなスラブ１の熱伝達系を考
え下式に基づいて炉温からスラブ１の温度を予測
している。即ち、スラブ１の熱拡散方程式は、
∂θ（ｔ，ｘ）／∂ｔ＝ｋ／Ｃｓρｓ・∂２θ（ｔ，ｘ
）／∂ｘ ２……(1)
で表わすことができる。ここで、θ（ｔ，ｘ）は
スラブ１の温度であり、ｘはスラブ１の表面から
厚み方向への距離であつてｘ＝０はスラブ表面、
ｘ＝ｈ／２はスラブ中心を意味する。ｋはスラブ
１の熱伝導率、ρsはスラブ密度、Ｃsはスラブ比
熱である。 Conventionally, a method for predicting the temperature of a slab in a heating furnace considers the heat transfer system of the slab 1 as shown in FIG. 1 and predicts the temperature of the slab 1 from the furnace temperature based on the following equation. That is, the thermal diffusion equation for slab 1 is: ∂θ(t, x)/∂t=k/C s ρ s・∂ 2 θ(t, x
)/∂ x 2 ...(1). Here, θ(t,x) is the temperature of the slab 1, x is the distance from the surface of the slab 1 in the thickness direction, and x=0 is the slab surface,
x=h/2 means the center of the slab. k is the thermal conductivity of slab 1, ρ s is the slab density, and C s is the slab specific heat.
ところで、スラブ表面における加熱炉からスラ
ブ１への熱放射式は、
∂θ（ｔ，Ｏ）／∂ｘ＝σｓε／ｋ〔T4−θ４（ｔ，Ｏ
）〕………(2)
で表わすことができ、またスラブ中心の条件式
は、
∂θ（ｔ，ｈ／２）／∂ｘ＝０ ………(3)
で表わしている。但し、(3)式では、スラブ１の加
熱は上面と下面で対称であると考えている。上式
においてＴは炉温、σsはStephan−Boltzmann定
数、εはスラブ熱放射率、ｈはスラブ１の厚みで
ある。 By the way, the heat radiation formula from the heating furnace to the slab 1 on the slab surface is ∂θ(t,O)/∂x=σ s ε/k[T 4 −θ 4 (t,O
)]...(2), and the conditional expression for the center of the slab is expressed as ∂θ(t,h/2)/ ∂x =0...(3). However, in equation (3), it is assumed that the heating of the slab 1 is symmetrical between the upper and lower surfaces. In the above equation, T is the furnace temperature, σ s is the Stephan-Boltzmann constant, ε is the slab thermal emissivity, and h is the thickness of the slab 1.
しかし、上式においてスラブ熱放射率εは、ス
ラブ表面羅の状況やスラブ温度等によつて異なる
不確定要素であり、このため上式だけではスラブ
温度を正確に予測することができない。 However, in the above equation, the slab thermal emissivity ε is an uncertain element that varies depending on the condition of the slab surface, the slab temperature, etc. Therefore, the slab temperature cannot be accurately predicted using the above equation alone.
そこで、加熱炉からスラブ１を抽出した後にス
ラブ表面の温度を測定し、これによつてεを補正
することも考えられているが、この補正手段をと
つた場合には無駄時間が多くなる。 Therefore, it has been considered to measure the temperature of the slab surface after extracting the slab 1 from the heating furnace and correct ε based on this, but if this correction method is used, a large amount of wasted time occurs.
また実際に補正したいスラブ１は既に加熱炉か
ら抽出しているので、スラブ１の温度予測手段と
しては無意味なものとなり、仮に後続のスラブ１
にその補正信号を用いるとしてものそのスラブ１
自身も表面状態等で変化するため結果的に正確な
温度予測を行なうことができないことになる。 In addition, since slab 1 to be actually corrected has already been extracted from the heating furnace, it is meaningless as a means of predicting the temperature of slab 1.
Even if the correction signal is used for the slab 1
Since the temperature itself changes depending on the surface condition, etc., it becomes impossible to accurately predict the temperature.
本発明は上記実情にかんがみてなされたもので
あつて、炉温プロセスモデルを作成し、(1)式〜(3)
式とこの炉温プロセスモデルとから予め予測され
る熱放射率εに対する炉温を求め、この計算炉温
と測定炉温とが等しくなるように最適化手法によ
り繰返し演算することで適正なε値を求め、この
ε値を用いることでスラブ温度を計算しεによる
不確実さを除去する被加熱体の温度予測装置を提
供するものである。 The present invention has been made in view of the above circumstances, and a furnace temperature process model is created, and equations (1) to (3) are
The furnace temperature for the thermal emissivity ε predicted in advance is determined from the formula and this furnace temperature process model, and an appropriate ε value is obtained by repeatedly calculating using an optimization method so that the calculated furnace temperature and the measured furnace temperature are equal. The object of the present invention is to provide a temperature prediction device for a heated object that calculates the slab temperature by using this ε value and eliminates the uncertainty caused by ε.
以下、本発明の一実施例として例えば５帯式加
熱炉について図面を参照して説明する。第２図は
加熱炉の断面図を示す図であつて、この加熱炉は
煙道２に連通する予熱帯炉３、加熱帯炉４および
均熱帯炉５の順序で連通されている。そして、こ
れらの炉３〜５にそれぞれバーナ６〜８を取着
し、予熱帯炉３→り加熱帯炉４→均熱帯炉５の経
路で移送されるスラブ１を適宜な温度で加熱する
ようにしている。 DESCRIPTION OF THE PREFERRED EMBODIMENTS A five-zone heating furnace, for example, as an embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a cross-sectional view of the heating furnace, which is connected to a flue 2 in the order of a preheating zone furnace 3, a heating zone furnace 4, and a soaking zone furnace 5. Burners 6 to 8 are attached to these furnaces 3 to 5, respectively, so that the slab 1 transferred through the route of preheating zone furnace 3 → heating zone furnace 4 → soaking zone furnace 5 is heated to an appropriate temperature. I have to.
即ち、第２図は加熱炉をゾーン（帯）単位で分
離し連通した図であるが、ここでは予熱帯炉３を
例にとつて説明する。予熱帯炉３は分布定数系で
あるが、炉３とスラブ１の熱計算を容易にするた
め予熱帯炉３をスラブ幅に従つてデイスクリート
に分割し、各セクシヨンにおける熱平衡を考え
る。セクシヨン番号は、第３図のように予熱帯炉
３の出口側端部をｉ＋１、予熱帯炉３の入口側端
部をｉ＋NB（ｉ）とする。 That is, although FIG. 2 is a diagram in which the heating furnace is separated into zones and communicated with each other, the preheating furnace 3 will be explained here as an example. Although the preheating zone furnace 3 is a distributed constant system, in order to facilitate the thermal calculation of the furnace 3 and the slab 1, the preheating zone furnace 3 is divided into discrete sections according to the slab width, and the thermal balance in each section is considered. As shown in FIG. 3, the section numbers are i+1 for the outlet end of the preheating furnace 3 and i+NB(i) for the inlet end of the preheating furnace 3.
そこで、第４図ａ，ｂのように各セクシヨンに
おける熱平衡を考えると、その熱平衡の炉温プロ
セスモリブデリングは下式のようになる。 Therefore, considering the thermal balance in each section as shown in FIG.
Ｆj（ｔ）＋ｍc（ｔ）ＨJ-1（ｔ）
−ｍc（ｔ）ＨJ（ｔ）−Ｌj（ｔ）−Ｑj（ｔ）
＝０ ………(4)
この式でｊ＝１＋２，ｉ＋３……ｉ＋Ｎ（ｉ）
のである。 F j (t) + m c (t) H J-1 (t) -m c (t) H J (t) - L j (t) - Q j (t)
=0 ......(4) In this formula, j=1+2, i+3...i+N(i)
It is.
Ｆj（ｔ）＋Ａ（ｔ）−ｍc（ｔ）ＨJ（ｔ）
−Ｌjｔ）−Ｑj（ｔ）＋Ｕ（ｔ）＝０ ………(5)
この式でｊ＝ｉ＋１であり、またＱj（ｔ）は、
Ｑj（ｔ）＝σsεjＷjｌj〔Ｔ４ ｊ（ｔ）−Ｑ４ ｊ（
ｔ，
Ｏ）〕 ………(6)
である。(4)〜(6)式においてＦj（ｔ）は燃料の燃
焼により（ｊ）区分に入る熱量、mc（ｔ）は炉
ガス流量、Ｈj（ｔ）は（ｊ）区分から（ｊ＋
１）区分へのガスのエンタルピー、Ｌj（ｔ）＝
（ｊ）の区分における熱損失、Ｑj（ｔ）は（ｊ）
区分の炉からスラブ１への伝熱量である。また、
Ａ（ｔ）は（ｊ＋１）区分への燃料、空気、混合
ガス熱流量、Ｕ（ｔ）は上流のゾーンからの熱流
量である。また、Ｗj，liはスラブ１の幅と長さ、
εjは熱放射率、Ｔj（ｔ）は（ｊ）区分における
炉温、Ｑj（ｔ，０）は（ｊ）スラブ１の表面温
度である。 F j (t) + A (t) - m c (t) H J (t) - L j t) - Q j (t) + U (t) = 0 ...... (5) In this formula, j = i + 1 , and Q j (t) is expressed as Q j (t)=σ s ε j W j l j [T 4 j (t)−Q 4 j (
t,
O)] ......(6). In equations (4) to (6), F j (t) is the amount of heat that enters the (j) category due to fuel combustion, mc (t) is the furnace gas flow rate, and H j (t) is the amount of heat that enters the (j) category from the (j) category.
1) Enthalpy of gas into the section, L j (t)=
The heat loss in the section (j), Q j (t) is (j)
This is the amount of heat transferred from the furnace of the section to the slab 1. Also,
A(t) is the fuel, air, mixed gas heat flow into the (j+1) section, and U(t) is the heat flow from the upstream zone. In addition, W j and li are the width and length of slab 1,
ε j is the thermal emissivity, T j (t) is the furnace temperature in the (j) section, and Q j (t, 0) is the surface temperature of the (j) slab 1.
而して、本装置は、従来のスラブ温度を予測す
る(1)式〜(3)式と、上記炉温プロセスモデルの(4)式
〜(6)式とを用いて予測ε値による炉温を求める。
その後、この計算炉温と測定炉温とを比較し最適
化手法により、これら両炉温の差が最小となるよ
うなスラブ熱放射率を求める。そして、この最適
なスラブ熱放射率を用いて(1)式〜(3)式と実測炉温
とによりスラブ温度を予測するものである。 Therefore, this device uses equations (1) to (3) for predicting the conventional slab temperature and equations (4) to (6) of the above furnace temperature process model to calculate the furnace temperature based on the predicted ε value. Find warmth.
Thereafter, this calculated furnace temperature and the measured furnace temperature are compared, and an optimization method is used to find the slab thermal emissivity that minimizes the difference between these two furnace temperatures. Then, using this optimal slab thermal emissivity, the slab temperature is predicted from equations (1) to (3) and the actually measured furnace temperature.
次に、第５図は以上の思想を採り入れて具体化
した図である。同図において１１は初期予測熱放
射率εと計算繰返しの時のみ供給される補正熱放
射率Δεとを加算する加算回路、１２は加算回路
１１から出力された熱放射率および(1)式〜(3)式に
よる加熱炉からスラブ１への熱放射式を用いてス
ラブ温度θを予測出力するスラブ温度計算装置、
１３は熱放射率、燃料流量、計算で求めたスラブ
温度θ等を用いて(4)式〜(6)式のモデルに基づいて
炉温Ｔを求める炉温計算装置である。これらの計
算装置１２，１３は互に求めた値を相手側装置１
３，１２に供給して高速シミユレーシヨンを行な
つてスラブ温度θおよび炉温Ｔを求めている。１
４は炉温計算装置１３の計算終了によつて閉成す
る第１のスイツチ回路、１５は計算炉温Ｔと測定
炉温ＴMとを比較する比較器、１６は比較器１５
から得た偏差炉温が許容値以内であるか否かを判
断し、許容値位内であればスラブ温度θを予測温
度とし、許容値以上であれば計算繰返し指令信号
を出力する判断回路である。１７は炉温偏差値に
係数Ｋを掛けて補正熱放射率Δεを出力する補正
熱放射率取得手段としての係数器、１８は炉温計
算装置１３の計算終了信号と判断回路１６からの
計算繰返し指令信号との入力条件で閉成する第２
のスイツチ回路である。 Next, FIG. 5 is a diagram that embodies the above idea. In the figure, 11 is an addition circuit that adds the initial predicted thermal emissivity ε and the corrected thermal emissivity Δε that is supplied only when calculation is repeated, and 12 is the thermal emissivity output from the addition circuit 11 and the equation (1) ~ A slab temperature calculation device that predicts and outputs the slab temperature θ using the heat radiation formula from the heating furnace to the slab 1 according to equation (3),
13 is a furnace temperature calculation device that calculates the furnace temperature T based on the models of equations (4) to (6) using thermal emissivity, fuel flow rate, calculated slab temperature θ, etc. These calculation devices 12 and 13 send the mutually calculated values to the other device 1.
The slab temperature θ and the furnace temperature T are determined by high-speed simulation. 1
4 is a first switch circuit that is closed when the calculation of the furnace temperature calculating device 13 is completed; 15 is a comparator that compares the calculated furnace temperature T and the measured furnace temperature T M ; and 16 is a comparator 15.
The judgment circuit judges whether the deviation furnace temperature obtained from the above is within the allowable value, and if it is within the allowable value, the slab temperature θ is set as the predicted temperature, and if it is above the allowable value, outputs a calculation repeat command signal. be. 17 is a coefficient unit as a corrected thermal emissivity obtaining means that multiplies the furnace temperature deviation value by a coefficient K and outputs a corrected thermal emissivity Δε; 18 is a calculation completion signal from the furnace temperature calculation device 13 and calculation repetition from the judgment circuit 16; The second valve is closed under the input conditions of the command signal.
This is a switch circuit.
次に、以上のような装置の作用を説明する。先
ず、初めに初期予測熱放射率εおよび炉温Ｔ等を
スラブ温度計算装置１２に入れて(1)式〜(3)式に基
づいて高速シミユレーシヨンを行なつてスラブ温
度θを予測計算し、さらに初期予測熱放射率εお
よび燃料流量、スラブ温度θ等を炉温計算装置１
３に入れて(4)式〜(6)式に基づいて高速シミユレー
シヨンを行なつて炉温Ｔを求める。計算が終了し
たならば、炉温計算装置１３から計算終了信号を
出して第１およんび第２のスイツチ回路１４，１
８に入れ第１のスイツチ回路１４を閉成する。こ
れにより炉温Ｔは第１のスイツチ回路１４を経て
比較器１５に入る。この時、比較器１５には実測
された測定炉温ＴMが入つている。従つて、比較
器１５では両列温Ｔ，ＴMを比較しその炉温偏差
値を求めて判断回路１６に供給する。この判断回
路１６はその炉温偏差値が許容値以下のときに初
期予測熱放射率εが正しいと判断しスラブ温度計
算装置１２で求めたスラブ温度θを求めたいスラ
ブ温度と判断して同装置１２より出力する。炉温
偏差値が許容値以上であるときには計算繰返憂し
指令信号を出して以上の計算を繰返す。 Next, the operation of the device as described above will be explained. First, the initial predicted thermal emissivity ε, furnace temperature T, etc. are entered into the slab temperature calculation device 12, and a high-speed simulation is performed based on equations (1) to (3) to predict and calculate the slab temperature θ. Furthermore, the initial predicted thermal emissivity ε, fuel flow rate, slab temperature θ, etc. are calculated using the furnace temperature calculation device 1.
3 and perform high-speed simulation based on equations (4) to (6) to determine the furnace temperature T. When the calculation is completed, the furnace temperature calculation device 13 outputs a calculation end signal and the first and second switch circuits 14, 1
8 to close the first switch circuit 14. As a result, the furnace temperature T enters the comparator 15 via the first switch circuit 14. At this time, the comparator 15 contains the actually measured furnace temperature T M . Therefore, the comparator 15 compares the temperatures T and T M of both rows, obtains the furnace temperature deviation value, and supplies the obtained furnace temperature deviation value to the judgment circuit 16. This judgment circuit 16 judges that the initial predicted thermal emissivity ε is correct when the furnace temperature deviation value is less than the allowable value, and judges that the slab temperature θ obtained by the slab temperature calculation device 12 is the slab temperature to be calculated, and the device Output from 12. When the furnace temperature deviation value is above the allowable value, a calculation repeat command signal is issued and the above calculation is repeated.
而して、計算繰返し指令信号がでると、第２の
スイツチ回路１８が閉路するので、係数器１７で
炉温偏差値に係数Ｋを掛けて得られた補正熱放射
率Δεがでてこれが第２のスイツチ回路１８を経
て加算回路１１に入峠る。この結果、加算回路１
１は初期予測熱放射率εに補正熱放射率Δεを加
えてε＋Δεなる新しい熱放射率率をスラブ温度
計算装置１２と炉温計算装置１３に供給し、それ
ぞれの装置１２，１３で高速シミユレーシヨンを
行なつて前回と同じ計算によつてスラブ温度θお
よび炉温Ｔを求める。そして以上の計算動作は炉
温偏差値が許容値以下になるまで繰返し、最終的
歴に偏差炉温が許容値以下となつたとき、その熱
放射率と、その時のスラブ温度を予測温度として
出力する。 Then, when the calculation repeat command signal is issued, the second switch circuit 18 is closed, and the coefficient unit 17 multiplies the furnace temperature deviation value by the coefficient K to obtain the corrected thermal emissivity Δε. The signal passes through the switch circuit 18 of No. 2 and enters the adder circuit 11. As a result, adder circuit 1
1 adds the corrected thermal emissivity Δε to the initial predicted thermal emissivity ε and supplies a new thermal emissivity rate of ε+Δε to the slab temperature calculation device 12 and the furnace temperature calculation device 13, and each device 12 and 13 performs a high-speed simulation. Then, the slab temperature θ and the furnace temperature T are determined by the same calculation as the previous time. The above calculation operation is repeated until the furnace temperature deviation value falls below the allowable value, and when the deviation furnace temperature becomes below the allowable value in the final history, the thermal emissivity and the slab temperature at that time are output as the predicted temperature. do.
このように、本装置は炉温モデル式を用いて初
期予測熱放射率による炉温を求め、これと測定炉
温との差が最小となるε値を得、このε値でスラ
ブの温度を予測するので、不確実要素である熱放
射率の影響をなくしてスラブ温度を予測できる。 In this way, this device uses the furnace temperature model formula to determine the furnace temperature based on the initial predicted thermal emissivity, obtains the ε value that minimizes the difference between this and the measured furnace temperature, and uses this ε value to determine the temperature of the slab. Because it is predicted, the slab temperature can be predicted without the influence of thermal emissivity, which is an uncertain element.
なお、上記実施例では、(4)式〜(6)式の炉温モデ
ル式を用いたが、これらの式に限定されずに種々
のモデル式で実現できる。 In the above embodiment, the furnace temperature model equations (4) to (6) are used, but the present invention is not limited to these equations and can be realized using various model equations.
以上詳記したようにに本発明によれば、炉温モ
デル式によつて炉温を求め、これと測定炉温の偏
差が許容値以上であれば補正熱放射率を初期予測
熱放射率に加えてスラブの予測温度を求めるよう
にしたので、熱放射率による不確実要素をなくし
て正確にスラブの予測温度を求めることができ
る。 As detailed above, according to the present invention, the furnace temperature is determined using the furnace temperature model equation, and if the deviation between this and the measured furnace temperature is greater than or equal to the allowable value, the corrected thermal emissivity is used as the initial predicted thermal emissivity. In addition, since the predicted temperature of the slab is determined, it is possible to eliminate the uncertain element due to thermal emissivity and accurately determine the predicted temperature of the slab.
なお、本装置は被加熱体としてスラブに限らな
いことは勿論である。 Note that, of course, the object to be heated in this apparatus is not limited to a slab.
第１図はスラブの熱伝達状態を説明する図、第
２図ないし第５図は本発明装置の一実施例を説明
するために示したもので、第２図は加熱炉の断面
図、第３図は第２図の予熱帯炉内のスラブをデイ
スクリートに分割して熱平衡を考えるための図、
第４図ａ，ｂは炉温プロセスモデリングを得るた
めの被加熱体の各セクシヨンの熱平衡図、第５図
は本発明装置を適用した具体的な構成図である。
１……スラブ（被加熱体）、２……煙道、３…
…予熱帯炉、４……加熱帯炉、５……均熱帯炉、
６〜８……バーナ、１１……加算回路、１２……
スラブ温度計算装置、１３……炉温計算装置、１
４……スイツチ回路、１５……比較器、１６……
判断回路、１７……係数器、１８……第２のスイ
ツチ回路。
Fig. 1 is a diagram for explaining the heat transfer state of the slab, Figs. 2 to 5 are shown for explaining an embodiment of the apparatus of the present invention, and Fig. 2 is a cross-sectional view of the heating furnace. Figure 3 is a diagram for considering heat balance by dividing the slab in the preheating furnace in Figure 2 into discrete parts.
4a and 4b are thermal balance diagrams of each section of the heated body for obtaining furnace temperature process modeling, and FIG. 5 is a specific configuration diagram to which the apparatus of the present invention is applied. 1... Slab (heated object), 2... Flue, 3...
... Preheating zone furnace, 4... Heating zone furnace, 5... Soaking zone furnace,
6 to 8...burner, 11...addition circuit, 12...
Slab temperature calculation device, 13... Furnace temperature calculation device, 1
4...Switch circuit, 15...Comparator, 16...
Judgment circuit, 17...Coefficient unit, 18...Second switch circuit.
Claims (1)
加熱体表面における加熱炉から被加熱体への熱放
射式に基づいて加熱炉内部の被加熱体温度を求め
る被加熱体温度計算手段と、この計算手段によつ
て求められた被加熱体温度および前記初期予測熱
放射率を用い、プロセスモデルに従つて前記計算
炉温を求めて前記被加熱体温度計算手段に供給す
る炉温計算手段と、この炉温計算手段によつて求
めた前記計算炉温と測定炉温とを比較して両炉温
の偏差値を求める比較手段と、この比較手段によ
つて求めた炉温偏差値に、ある係数を乗じて補正
熱放射率を得る補正熱放射率取得手段と、前記比
較手段から出力された前記炉温偏差値が許容値以
上か否かを判断し、前記炉温偏差値が許容値以下
のときに前記被加熱体温度計算手段によつて求め
た温度を前記被加熱体の予測温度と判断し、また
前記炉温偏差値が許容値以上のときに前記補正熱
放射率を加えた前記初期予測熱放射率を用いて前
記両計算手段が繰返し計算を行うための計算繰返
し指令信号を出力する判断手段とを備えたことも
特徴とする被加熱体の温度予測装置。1. A heated object temperature calculation means for calculating the temperature of the heated object inside the heating furnace based on a heat radiation formula from the heating furnace to the heated object on the surface of the heated object, using the initial predicted thermal emissivity and the calculated furnace temperature; Furnace temperature calculation means for calculating the calculated furnace temperature according to a process model and supplying the calculated furnace temperature to the heating object temperature calculation means using the temperature of the heated body determined by the calculation means and the initially predicted thermal emissivity; , a comparison means for comparing the calculated furnace temperature obtained by the furnace temperature calculation means and the measured furnace temperature to obtain a deviation value between the two furnace temperatures, and a furnace temperature deviation value obtained by the comparison means, corrected thermal emissivity obtaining means for obtaining a corrected thermal emissivity by multiplying by a certain coefficient; and determining whether or not the furnace temperature deviation value outputted from the comparing means is equal to or greater than a permissible value; In the following cases, the temperature calculated by the heated object temperature calculation means is determined to be the predicted temperature of the heated object, and when the furnace temperature deviation value is equal to or higher than the allowable value, the corrected thermal emissivity is added. A device for predicting the temperature of a heated object, further comprising: a determining means for outputting a calculation repetition command signal for causing both of the calculation means to repeatedly perform calculations using the initial predicted thermal emissivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11070679A JPS5635026A (en) | 1979-08-30 | 1979-08-30 | Temperature estimating system for heated object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11070679A JPS5635026A (en) | 1979-08-30 | 1979-08-30 | Temperature estimating system for heated object |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5635026A JPS5635026A (en) | 1981-04-07 |
| JPS6140053B2 true JPS6140053B2 (en) | 1986-09-06 |
Family
ID=14542386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11070679A Granted JPS5635026A (en) | 1979-08-30 | 1979-08-30 | Temperature estimating system for heated object |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5635026A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4881823A (en) * | 1988-03-29 | 1989-11-21 | Purdue Research Foundation | Radiation thermometry |
| JP2006170616A (en) * | 2001-03-06 | 2006-06-29 | Tokyo Electron Ltd | Temperature measuring method and apparatus, semiconductor heat treatment apparatus |
| EP2140767B1 (en) | 2008-07-04 | 2014-05-07 | CFS Bakel B.V. | Food product forming apparatus and process |
| PL2454943T3 (en) | 2010-11-23 | 2020-11-16 | Gea Food Solutions Bakel B.V. | Apparatus and method for the production of a product with an interleaver |
-
1979
- 1979-08-30 JP JP11070679A patent/JPS5635026A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5635026A (en) | 1981-04-07 |
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