| 摘要 |
PURPOSE:To measure internal surface temperature accurately over the entire length of a steel tube in a furnace by making a scan and measuring the temperature by a radiation thermometer to the overall length of a tubular body and obtaining the lengthwise temperature distribution of the tubular body from measured values of temperature. CONSTITUTION:The radiation thermometer 10 is so installed as to scan the internal surface of the steel tube 1 from its close tube end 1a to its distant tube end 1b through an observation hole 4 made in the wall of the furnace 5. Then, a nonreflective, nonradiative member 17 is provided on the wall of the furnace 5 on the opposite side from the distant tube end 1b of the steel tube 1 to prevent radiant energy from inside the furnace 5 from reaching the thermometer 10 through the inside of the steel tube 1 from the distant tube end 1b of the steel tube 1. Thus, the internal surface of the steel tube 1 is scanned by the thermometer 10 to its overall length and the lengthwise temperature distribution of the steel tube 1 is obtained from the measured values of temperature.
|
