Thermocouple thermometers - Thermoelectric effect ntsuas kub
Txhais:
Ib khub ntawm cov khoom siv hluav taws xob uas tsim hluav taws xob hluav taws xob hauv Circuit Court raws li cov nyhuv Zebeck. Lub ntsiab lus tseem ceeb rau kev ntsuas kub siv ib khub ntawm cov khoom sib txawv ntawm cov khoom sib txuas ua ke ntawm ib kawg thiab lawv cov nyhuv thermoelectric.
Txheej txheem cej luam:
Lub thermocouple yog qhov ntsuas kub thiab ntsuas ntsuas. Nws ncaj qha ntsuas qhov ntsuas kub thiab hloov cov teeb liab kub rau hauv lub teeb liab hluav taws xob hluav taws xob hluav taws xob, uas tom qab ntawd hloov mus rau qhov ntsuas kub ntawm qhov nruab nrab ntsuas los ntawm cov cuab yeej hluav taws xob (cov cuab yeej thib ob). Lub hauv paus ntsiab lus ntawm kev ntsuas qhov ntsuas kub ntawm thermocouple yog tias ob yam khoom sib txawv ntawm cov khoom siv hluav taws xob tsim ib lub voj voog kaw. Thaum muaj qhov kub thiab txias ntawm ob qhov kawg, yuav muaj tam sim no dhau los ntawm Circuit Court. Lub sijhawm no, muaj lub zog hluav taws xob ntawm ob qhov kawg - thermoelectric electromotive force, uas yog hu ua Seebeck effect. Ob homogeneous conductors nrog sib txawv muaj pes tsawg leeg yog thermoelectric electrodes, nrog rau kev ua hauj lwm kawg ntawm qhov kub thiab txias kawg ntawm qhov kub thiab txias. Qhov kawg dawb yog feem ntau ntawm qhov kub thiab txias. Raws li kev sib raug zoo ntawm cov thermoelectric electromotive quab yuam thiab kub, lub rooj kawm tiav thermocouple yog tsim; Lub rooj kawm tiav tau txais nyob rau hauv qhov xwm txheej ntawm qhov kub thiab txias ntawm 0 degree, thiab cov thermocouples sib txawv muaj cov rooj kawm tiav sib txawv.
Thaum cov khoom siv hlau thib peb txuas nrog lub thermocouple Circuit Court, ntev npaum li qhov kub ntawm ob qhov kev sib cuag ntawm cov khoom yog tib yam, cov khoom siv hluav taws xob uas tsim los ntawm cov thermocouple yuav nyob twj ywm tsis hloov, uas yog, tsis cuam tshuam los ntawm kev sib txuas ntawm peb cov hlau. mus rau Circuit Court. Yog li ntawd, thaum ntsuas kub nrog lub thermocouple, lub ntsuas ntsuas tuaj yeem txuas nrog, thiab tom qab ntsuas qhov ntsuas kub ntawm lub tshuab hluav taws xob hluav taws xob, qhov ntsuas kub ntawm qhov nruab nrab tuaj yeem paub. Thaum ntsuas qhov ntsuas kub, lub thermocouple yuav tsum ntsuas qhov kub ntawm nws qhov txias kawg (qhov ntsuas qhov kawg yog qhov kub kawg, thiab qhov kawg txuas nrog lub ntsuas hluav taws xob los ntawm cov hlau lead yog hu ua qhov txias kawg) kom nyob twj ywm, kom nws cov thermoelectric peev xwm yog proportional. mus rau qhov ntsuas kub. Yog tias qhov kub ntawm qhov txias kawg hloov thaum ntsuas, nws yuav cuam tshuam rau qhov tseeb ntawm qhov ntsuas. Kev siv qee yam kev ntsuas ntawm qhov txias txias kom them rau qhov cuam tshuam los ntawm qhov kub thiab txias ntawm qhov txias kawg yog hu ua thermocouple txias kawg them nyiaj. Daim ntawv txuas: Kev suav cov txheej txheem rau cov thermocouple txias junction them nyiaj: Los ntawm millivolts mus rau qhov kub thiab txias: ntsuas qhov kub ntawm qhov sib txuas, hloov mus rau tus nqi millivolt sib raug, thiab ntxiv rau millivolt tus nqi ntawm lub thermocouple los xam qhov ntsuas kub. Los ntawm qhov kub thiab txias mus rau millivolts: Ntsuas qhov ntsuas kub thiab txias kawg, hloov mus rau millivolts, rho tawm kom tau millivolts, thiab tau txais qhov kub thiab txias.
