“…Aluminum is one of the most commonly used industrial metals and is an important basic raw material for national economic development 1 . Since 1886, when Hall in the U.S. and Heroult in France invented the process of aluminum production called as electrolysis, the process of electrolytic aluminum has been developing rapidly, and as the alumina electrolysis bath becomes larger and larger, the risk of breakage and leakage increases 2 . Currently most of these temperatures are measured using manual portable infrared thermometers 3 4 , on one hand, workers are labor-intensive and the working environment with high temperature and strong magnetic field affects the physical and mental health of workers, on the other hand, the infrared thermometer is easy to fail in a strong magnetic field environment and cannot measure the temperature continuously in real-time, so the hidden problems cannot be found in time 5 .…”