JPS57108628A - Detecting method for temperature - Google Patents
Detecting method for temperatureInfo
- Publication number
- JPS57108628A JPS57108628A JP18466480A JP18466480A JPS57108628A JP S57108628 A JPS57108628 A JP S57108628A JP 18466480 A JP18466480 A JP 18466480A JP 18466480 A JP18466480 A JP 18466480A JP S57108628 A JPS57108628 A JP S57108628A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- value
- time
- deltat
- furnace
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
PURPOSE:To control the temperature of a heated substance at the outlet of a continuously-heating furnace to be at an aimed value, by using a thermal balance equation which is formed in the furnace, a radiation heat transmission formula which is formed between furnace gas and the substance to be heated and a heat transmission equation for the substance to be heated. CONSTITUTION:The flow rate mf of fuel supplied to the inside of the furnace 1 and the temperature thetag of the furnace gas are measured and an operation is conducted in an operation circuit meeting the thermal balance equation of the formula 1, whereby a heat quantity Q' transmitted to steel pieces 11...1n within a time DELTAt is calculated. Next, another operation is conducted by an operation circuit S2 meeting the radiation heat transmission formula of the formula 2 by using a measured value of thetag(t) at a time t, a calculated value of thetas(t-DELTAt,0) of the tempeature of the surface of the steel pieces 11...1n by DELTAt time before the time t and the heat quantity Q' and thereby an overall heat absorption coefficient phiCG, which is proper to the furnace zone is calculated backward. When the value phiCG, thus obtained is within standard deviation, the temperature thetas(tx) of the heated substance is found by using the value. And, when the value is without the deviation, it is modified, and said temperature thetas(tx) is found by using the modified overall heat absorption coefficient phiCG, the temperature thetas(t-DELTAt,x) of the steel pieces 11...1n at the time (t-DELTAt), the temperature thetag(t) of the furnace gas at the time t and the formulas 2 and 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18466480A JPS57108628A (en) | 1980-12-25 | 1980-12-25 | Detecting method for temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18466480A JPS57108628A (en) | 1980-12-25 | 1980-12-25 | Detecting method for temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57108628A true JPS57108628A (en) | 1982-07-06 |
| JPS6143649B2 JPS6143649B2 (en) | 1986-09-29 |
Family
ID=16157186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18466480A Granted JPS57108628A (en) | 1980-12-25 | 1980-12-25 | Detecting method for temperature |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57108628A (en) |
-
1980
- 1980-12-25 JP JP18466480A patent/JPS57108628A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6143649B2 (en) | 1986-09-29 |
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