The second is the non-contact method, which generally uses an infrared thermometer, which has been used since the 1960s.
This method determines the surface temperature of the measured object by measuring the amount of infrared radiation of the measured object. Its biggest advantage is that it can measure the surface temperature distribution of the measured object without touching it. Infrared thermometers continue to develop. At present, they can not only measure the surface temperature, but also analyze the isotherm map and the area ratio of the same temperature with the help of computers. They can also study fault detection and fault growth. It is also possible to study the flow of air inside the tire during rolling from the perspective of heat conduction. The non-contact method has taken a big step forward than the contact method, providing conditions for mathematical analysis to predict the overall temperature and heat distribution of the tire. But its limitation is that it can only measure the temperature of the tire surface.

With the further development and maturity of computing theory, people gradually began to use mathematical modeling methods to study the heat generation law and temperature field distribution of tires. The introduction of the finite element method has made considerable progress in tire temperature field analysis. Its advantage is that it can accurately simulate the structure and material of the tire, and can directly predict the temperature field of the tire according to the operating conditions and material characteristics of the tire.