Infrared thermal imaging technology has only been used in high-end applications such as national defense and military, but in the past few decades, it has gradually become a more mainstream technology. As hand-held infrared thermal imager is becoming more and more popular in maintenance and electrical troubleshooting applications, people are increasingly aware of the industrial benefits of the technology, according to Maims. In 2020, the new crown epidemic, a large number of infrared thermal imaging solutions naturally poured into the market. Various infrared thermal imaging sensor techniques and cameras are used for heat detection, although technically, infrared thermal imaging sensors can only measure skin surface temperature.