Termoelementas termometrai - Termoelektrinis efektas temperatūra matavimas
Apibrėžimas:
A pora išlaidžių medžiagų kad generuoja elektromotorinė jėga in a grandinė pagrįsta on the Zebeck efektas. A jautrus elementas for temperatūra matavimas naudojimas a pora laidininkai iš skirtingos medžiagos surištos kartu at vienas galas ir jų termoelektrinis efektas.
A thermocouple is a temperature sensing element and an instrument. It directly measures temperature and converts the temperature signal into a thermoelectric electromotive force signal, which is then converted into the temperature of the measured medium through electrical instruments (secondary instruments). The basic principle of thermocouple temperature measurement is that two different materials of conductors form a closed circuit. When there is a temperature gradient at both ends, there will be current passing through the circuit. At this point, there is an electromotive force between the two ends - thermoelectric electromotive force, which is called the Seebeck effect. Two homogeneous conductors with different compositions are thermoelectric electrodes, with the working end at the higher temperature and the free end at the lower temperature. The free end is usually at a constant temperature. According to the functional relationship between thermoelectric electromotive force and temperature, a thermocouple graduation table is made; The graduation table is obtained under the condition of a free end temperature of 0 degree , and different thermocouples have different graduation tables.
