温度的概念来源于人对于物体主观感觉。实际测量需要将非电量的温度转变为电量。早年间,只有比较有限的温度传感器能够选择。使用的最普遍的传感器就是热敏电阻,这是阻值决定于其温度的一种电阻,但变化是非线性的。你可以串接一块毫安计和热敏电阻,并且用这自制的仪表读出温度。但为进一步的应用,其非线性特性必 The concept of temperature comes from people’s subjective perception of objects. The actual measurement needs to be non-electrical temperature into electricity. In the early years, only a relatively limited number of temperature sensors were available. The most common sensor used is a thermistor, which is a resistor whose resistance depends on its temperature, but the change is non-linear. You can connect a milliammeter and a thermistor in series and read the temperature with this homemade meter. However, for further applications, its nonlinear characteristics must be