的测温原理: Temperature measurement principle of thermal resistance :
的测温原理不同的是，热电阻是基于电阻的热效应进行温度测量的，即电阻体的 Different from the thermocouple temperature measurement principle, the thermal resistance is based on the thermal effect of resistance to measure temperature, that is
The characteristic that the resistance value changes with temperature. Therefore, as long as the resistance change of the temperature-sensitive thermal resistance is measured, it can be measured.
出 温度。 Out temperature. There are mainly two types of metal thermistors and semiconductor thermistors.
The resistance value and temperature of metal thermal resistance can generally be expressed by the following approximate relationship, that is,
Rt = Rt0 [1 + α (t-t0)]
In the formula, Rt is the resistance value at temperature t; Rt0 is the corresponding resistance value at temperature t0 (usually t0 = 0 ° C); α is the temperature coefficient.