For people who understand physics, they should all know that a very important electronic component is used in a circuit, that is, a resistor. The resistance is divided into different types, the most commonly used is the NTC thermistor, and the thermistor can also be divided into many small types. The most widely used is NTC thermistor, this kind of resistance is often used to measure temperature, but most people don't know what the thermistor temperature measurement principle is. Let's briefly analyze it below.



First, the temperature characteristic curve.

First of all, we must fully understand the temperature characteristic curve of the NTC thermistor. Through this curve, you can find that in the process of using thermistor or connecting the resistor to the circuit, as the current flows in, its temperature will gradually increase. When the temperature rises, its resistance will decrease accordingly. This is a negative temperature coefficient thermistor. There is a certain rule between temperature and resistance. By measuring the current in it, you can know how far it is from the resistance, and then according to the corresponding formula, you can further calculate how high the temperature in the circuit is. This is It measures the measuring principle of temperature. Any kind of circuit that requires the use of a thermistor as a temperature sensor is carried out using this principle.

Second, other uses.

After most people understand the temperature measurement principle of NTC thermistor, they will feel that the thermistor does have a very powerful function. Not only can its resistance change when the temperature rises, but its change will also show Certain laws, and precisely for this reason, can be used to measure temperature, and a certain measurement accuracy can be achieved. However, besides measuring temperature, thermal resistance has many other uses. For example: it can be used as a temperature compensation film. Because the circuit is in use, the temperature will continue to rise. In this case, the various resistances in the circuit and the resistance of the electrical appliances used will change. At this time, you can correct it by connecting an NTC thermistor in parallel, so as to ensure the performance of various instruments. Precision.