| 摘要 |
PURPOSE:To measure a temp. distribution in a furnace precisely and stably for a long term by setting plural tubes, which are different in length and closed at the ends, to a high pressure furnace, detecting a thermal emission from an inner wall of said tubes at the opening hole parts thereof to perform arithmetic processing. CONSTITUTION:The tubes 12 whose ends are closed are set while penetrating a furnace wall 11 of a high-pressure vessel. Detectors 13 containing photoelectric converters are provided at the opening hole parts of said tubes to convert the thermal emissions from the top end parts of the tubes 12 to electric signals to amplify them by amplifiers 14, then said signals are introduced to a computer 15 to perform respective necessary arithmetic processings. Thereat, the temp. measurement error due to stray light from side walls of the end closed tubes is corrected to take out only the thermal emission power at the top end part of said tube and to measure the temp. distribution in furnace. Thereby, the temp. distribution in furnace can be measured precisely and stably for a long term. |
