熱電対および温度測定原理の導入

1. Thermocouppleの紹介

熱電レコーダーは、多くの場合、温度測定要素として熱電対を使用します{. -200度-200度.の範囲の温度を測定するために広く使用されています。範囲{.熱電対は、温度を検出のために電気量に変換するため、温度を測定および制御すること、温度信号を増幅および変換することが非常に便利であり、長距離測定と自動制御に適しています。

2.熱電対温度測定原理：

Definition: A sensor composed of two conductors that converts temperature into thermoelectric potential is called a thermocouple. 2. Temperature measurement principle: The temperature measurement principle of thermocouples is based on the thermoelectric effect. Connect conductors A and B of two different materials in series to form a closed loop. When the temperatures of the two junctions 1 and 2 are different, if T>T0 (as shown in Figure 12-1 Thermoelectric effect), a thermoelectric potential will be generated in the loop, and a certain amount of current will be generated in the loop. This phenomenon is called the thermoelectric effect. The thermoelectric potential is recorded as EAB, and conductors A and B are called thermoelectrodes. Junction 1 is usually welded together. When measuring, it is placed in a temperature measurement location to feel the measured temperature, so it is called the measuring end (or working end, hot end). Junction 2 requires a constant temperature and is called the reference end (or cold end). 3. Thermoelectric effect: The closed circuit of the thermocouple composed of conductors A and B has two contact potentials, eAB (T) and eAB (T0), at the two junctions. Because T>t {{0}}}、導体AおよびB .には温度差の潜在力もあります。したがって、閉じたループの総熱電位EAB（t、t 0）は、接触電位の代数と閉じたポテンシャルの代数である必要があります。選択された熱電対は、基準温度が一定の場合、総熱電位は測定端で温度tの単一値関数になります。熱電対の.