Kako povezati toplotni upor konca obraza?

End face thermal resistors measure the surface temperature or inner temperature of an object and are often used to measure the temperature of bearings. Industrial thermal resistors are used as temperature measurement sensors and are usually used in conjunction with temperature transmitters, regulators, and display instruments to form process control systems to directly measure or control the temperature of liquids, steam, gaseous media, and solid surfaces within the range of -200 stopinja -500 stopnja v različnih proizvodnih procesih . Po razumevanju, kako delujejo končni termični upori obraza, bomo veliko lažje namestili termični upori End Face, vendar je treba opozoriti, da morata imeti toplotni upor in prikazni instrument; In da bi odpravili vpliv spremembe upora priključne žice, je treba uporabiti trižično metodo povezave .
Dvožični sistem: način povezovanja žice na vsakem koncu toplotnega upora za odstranjevanje upornega signala se imenuje dvožični sistem: ta metoda svinca je zelo preprosta, a ker mora povezovalna žica imeti upor svinca R, je velikost R povezana z materialom in dolžino žice, tako da je ta metoda le primerna le za natančnost z nizkimi merami z nizkimi merami z nizkimi merami z nizko merami
Tri-žični sistem: metoda povezovanja svinca na enem koncu korena toplotnega upora in dveh vodnikov na drugem koncu se imenuje trižični sistem . Ta metoda se običajno uporablja v povezavi z mostom, ki lahko bolje odpravi vpliv svinca in se najpogosteje uporablja v industrijskem nadzoru procesa .
Four-wire system: The method of connecting two wires at each end of the root of the thermal resistor is called the four-wire system, in which two leads provide a constant current I for the thermal resistor, convert R into a voltage signal U, and then lead U to the secondary instrument through the other two leads. It can be seen that this lead method can * eliminate the influence of the lead resistance, and is mainly used for high-precision temperature odkrivanje .
Termični upor sprejme trižično metodo povezave . Tri-žični sistem se uporablja za odpravo merilne napake, ki jo povzroči upor priključne žice ., to je zato, ker je vezje za merjenje termičnega upora na splošno neuravnotežen most {{4} thermalni upor. the central control room) also becomes a part of the bridge arm resistor. This part of the resistance is unknown and changes with the ambient temperature, causing measurement errors. A three-wire system is used, with one wire connected to the power supply end of the bridge, and the other two connected to the bridge arm where the thermal resistor is located and the adjacent bridge arm, thus eliminating the measurement error caused z uporom žice .