| 摘要 |
PURPOSE:To grasp the history of annealing temperature accurately, by providing a rotary disk at the other ends of a plurality of optical fibers, whose incident and surfaces are arranged along a product conveying path, and detecting the temperatures by an optical thermometer. CONSTITUTION:Pipes 3 are placed on a furnace bed 2, which is driven from an input side A to an output side B in an annealing furnace 1. Light from the pipes 3 is received by incident side end surfaces 51-55 of optical fibers 41-45, which are arranged on the ceiling part of the furnace 1 with an equal interval. Output side end surfaces 71-75 of the optical fibers 4 are connected to a rotary disk 6 at every specified angle in the circumferential direction of the rotary disk 6. The rotary disk 6 is driven and rotated by a pulse motor 8, and the light from the optical fibers 4 is sequentially sent to an optical thermometer 9. An analog signal corresponding to the temperature of the detected light from the thermometer 9 is stored in a memory 13. |
