To provide a method, in a measuring method using multiple reflection, which can measure the steel plate temperature with high accuracy over a long period of time, without being affected by fluctuations in the emissivity of a steel plate under measurement and changes in passage of time in the emissivity of a reflecting plate and its apparatus and a high-accuracy steel plate temperature control method.
The reflective plate 2 provided with a temperature control device 5 is placed facing the steel plate 1; a reflecting plate temperature T2 is measured directly by a contact thermometer 6; radiation energy which is multiply reflected between the reflecting plate 2 and the steel plate 1 is measured by a radiation thermometer 7; the temperature, determined by converting into the temperature of a black body which radiates energy equivalent to the radiation energy, is regarded as a multiple reflection temperature Tm; and the temperature control device 5 performs control to make the reflecting plate temperature T2 coincide with the multiple reflection temperature Tm, and the multiple reflection temperature Tm is set as the steel plate temperature.
NISHIKAWA TSUNEAKI
| JPH05203497A | 1993-08-10 | |||
| JPH05203498A | 1993-08-10 | |||
| JPH0367137A | 1991-03-22 | |||
| JP2001304968A | 2001-10-31 | |||
| JPS5750631A | 1982-03-25 |
Makoto Suhara
Takenaka Yoshimichi