To provide an effective refractory temperature measurement device by using a Raman scattering type temperature meter, which utilizes an optical fiber as a temperature sensor for constituting a temperature measurement device of a refractory furnace and reducing the distance resolution to be less than ±50 cm.
In a device for measuring temperature distribution in the refractory furnace at each position of fiber 1 extension, by analyzing a time from incidence of laser pulse into the fiber 1 to returning as back scattering light 3 in a state such that the fiber 1 is wound around the furnace wall, wavelength and light intensity, positional accuracy of each measuring point 1A is compensated, based on the emission time of the scattered light at a fixed point by thermally contacting a fixed low-temperature point 1A consisting of a water tube and the like 11 on the way of the fiber 1. The optical fiber, wound around the furnace wall, may be a plural number and the fixed low-temperature point 1A may have a known distance.
YASUDA SHIZUO
NISHIKAWA SUSUMU
ABE MICHIO
