Title:
TEMPERATURE CONTROLLER
Document Type and Number:
Japanese Patent JP3924854
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a temperature controller capable of stably controlling temperature with high accuracy excluding adverse effects from the discontinuous temperature detection amount, when a rapid heating is switched to a heating for holding a temperature level.
SOLUTION: An induced heating device 10 is used for the anneal heating of a plate joint welding part of a cold rolling line. The induced heating device 10 comprises an inductor 11, a high-frequency power source 12, a radiation thermometer 13 for measuring the temperature of a seam part, and a PC (programmable controller) 14 for performing temperature control from the temperature rise to holding of temperature. PC 14 inputs a measured temperature θr, a target temperature θs, a temperature rising set voltage V1 and a temperature holding set voltage V2, and the voltage E of the high-frequency power source 12 is adjusted to a specific value. Two kinds of settings, that is, the temperature rising set voltage V1 and the temperature holding set voltage V2 can be switched on through (θs-α) °C. After the switching, the PID control is executed after the time to reach the temperature balance condition has passed. αis calculated from α=aXβ+b [where X is the temperature rising output, X=V1, (a) is a coefficient, (b) is a constant, and β is 2.0 in the case of voltage].
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Inventors:
Hiroshi Sekino
Application Number:
JP20401397A
Publication Date:
June 06, 2007
Filing Date:
July 30, 1997
Export Citation:
Assignee:
KABUSHIKI KAISHA MEIDENSHA
International Classes:
G05D23/19; H05B6/06; G05B11/36; (IPC1-7): H05B6/06
Domestic Patent References:
| JP60163102A |
Attorney, Agent or Firm:
Tsuyoshi Hashimoto