| 摘要 |
PURPOSE:To enable a wide range of measurement by a reduced number of elements and to reduce heat loss, by driving a heat radiant ray detection head inclined to a temp. measuring surface in a rotary or advance and retraction direction around the shaft vertical to the temp. measuring surface. CONSTITUTION:A piercing hole 21 is provided to the furnace wall 20 of a heating furnace for heating a slab 22 being an object to be measured. A detection head 1 receiving heat radiant rays is inserted in the piercing hole 21 and heat radiant rays from the slab 22 are condensed by the lens 2 provided to the leading end of the head 1 and transmitted to a coupler 16 by an optical fiber 3. The leading end part of the head 1 is preliminarily inclined to the center axis 4 vertical to the temp. measuring surface of the slab 22 and the head 1 is rotated around the axis 4 by a rotary shaft 7 by driving a motor 6 or allowed to advance and retract in the axial direction with respect to the slab 22 by a motor 9 to measure the temp. of the slab 22. |
