Application of two-dimensional temperature field distribution reconstruction in microwave heating environment

Abstract

With the growth of the population in the world, energy problem has become a major topic in the world. Energy conservation has become an important part of China's national development strategy. The use of microwave heating instead of traditional heating can greatly improve the utilization rate of energy, and then achieve the goal of energy conservation and emissions reduction. However, due to the uneven heating of microwave heating, it will lead to thermal runaway phenomena, and even more serious explosion accidents. So, In order to use microwave energy efficiently and safely, obtaining the temperature distribution information under the microwave heating environment is significant. Due to the special nature of microwave heating environment, the traditional way of thermometry is not applicable. Ultrasonic thermometry technology can break through the limitation of microwave heating environment. In this paper, the basic principle of ultrasonic thermometry, temperature distribution reconstruction algorithm and physical operation platform are described in details. And then, two key issues of ultrasonic time-of-flight measurement and temperature field reconstruction have been verified on a physical operation platform. With and without the microwave injection, the reconstructed temperature field both shows the effectiveness of the proposed algorithm.