Method and Apparatus for Measuring Surface Temperature of Cast Slab

摘要

The main purpose of the present invention is to provide a method capable of measuring the surface temperature of multiple locations on a strand inexpensively and with good precision in the secondary cooling zone of a continuous caster comprising a vertical bending mold. The present invention is a method for measuring the surface temperature of a strand in the secondary cooling zone of a continuous caster and comprises: a step for disposing multiple nozzles between support rolls that support the strand, with one end side of an optical fiber (3) being enclosed in each nozzle (1) and a respective tube (2) connected to said nozzle; a step for receiving thermal radiation light from the strand at one end of each optical fiber while jetting purging air toward the surface of the strand from the respective nozzles; a step for collecting the other ends of the respective optical fibers (3, 81) in a bundle inside the frame (4) and capturing an image containing core images of the other end of each optical fiber (81) with an imaging means (5) disposed inside the frame; and a step for calculating the surface temperature of the strand on the basis of the pixel density of each core image in the captured image.