Entwodiksyon nan Prensip Mezi Thermocouple ak Tanperati

1. Entwodiksyon nan Thermocouples

Anrejistrè tanperati thermoelectric souvan itilize thermokouples kòm tanperati mezire eleman . Li se lajman itilize ki mezire tanperati nan seri a nan -200 degre ~ 1300 degre . nan ka espesyal, li ka mezire tanperati ki wo nan 2800 degre oswa ki ba tanperati a, ki wo, {{{{ Tanperati Range Ranje . Depi Thermocouples konvèti tanperati a nan kantite elektrik pou deteksyon, li trè pratik ki mezire ak kontwòl tanperati a, kòm byen ke anplifye ak transfòme siyal tanperati, epi li se apwopriye pou mezi long-distans ak kontwòl otomatik {9}

2. Prensip Mezi Tanperati Thermocouple:

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}}, gen tou yon diferans tanperati potansyèl nan kondiktè A ak B . Se poutèt sa, total thermoelectric potansyèl EAB a (t, t 0 nan bouk la fèmen yo ta dwe sòm aljèb nan potansyèl la potansyèl ak potansyèl la nan potansyèl la, ki se: ki se yon potansyèl ki gen rapò ak potansyèl la, ki se potansyèl la { Pou thermocaple a chwazi, lè tanperati a referans se konstan, total potansyèl la thermoelectric vin yon fonksyon sèl-valè nan t tanperati a nan fen a mezire, se sa ki, EAB (ｔ, t0) {{6} f (T) . dwe prezante nan bouk la fèmen nan thermocouple a .