Method of Mobile Heat-Resistant Screen Pyrometry.

The present article investigates possibilities for increasing the accuracy of non-contact temperature measurements. The proposed surface pyrometry method uses mobile reflective screens to reduce errors caused by background radiation from third-party emitters. The temperature measurements were carried out by a commercially-available narrow-angle pyrometer, sighted at the surface through a hole in the cavity of a screen made of a fibrous heat-resistant material. The results of experiments substantiating the content and parameters of the measurement method operations are presented. In particular, a decrease in the actual temperature of the measured surface by approximately 20–25°C was noted during the installation of uncooled screens into the chamber of the thermal unit prior each measurement. Qualitative results of measuring the surface temperature were obtained under conditions when the screens were in the furnace working space between measurements behind held for 1–2 min in positions on the surface for temperature leveling, first next to, then directly above the place of temperature measurement. The results of testing the measurement method in industrial conditions are described. This method can be used for technological measurements directly in high-temperature units or for periodic testing and determination of corrections to the readings of stationary pyrometers. [ABSTRACT FROM AUTHOR]