Cov yam ntxwv ntawm bimetallic thermometers
Qhov zoo ntawm bimetallic thermometers yog cov lus teb ceev ceev, me me, zoo linearity, thiab kuj ruaj khov. Qee cov khoom txawv teb chaws kuj muaj qhov kub thiab txias ua haujlwm.
Lub peev xwm thermoelectric ntawm tus pas ntsuas kub bimetallic tsuas yog cuam tshuam nrog cov khoom siv hluav taws xob ntawm cov khoom siv thermoelectric electrode thiab qhov kub sib txawv ntawm ob qhov kawg.
Siv tib yam homogeneous conductor lossis semiconductor los tsim ib lub voj voog yuav tsis tsim cov peev txheej thermoelectric.
Qhov kub ntawm ob qhov sib cuag ntawm lub thermocouple yog T, T{0}}. Yog tias T=T0, lub peev xwm ntawm qhov ntsuas kub ntawm cov thermocouple yog xoom. Txoj cai ntawm qhov nruab nrab kub nteg lub hauv paus rau kev tsim ib lub thermocouple kawm tiav rooj.
Yog tias ob hom conductors A thiab B tau ua ke nrog tus neeg xyuas pib thib peb los tsim cov khoom siv hluav taws xob, lawv muaj qhov ntsuas kub ntawm qhov dav thiab ruaj khov lub cev thiab tshuaj lom neeg rau kev siv mus ntev.
High conductivity, tsis tshua muaj kub coefficient; ※ Cov txheej txheem thermoelectric muaj peev xwm muaj kev nkag siab zoo, kev sib raug zoo ntawm cov khoom siv hluav taws xob thiab qhov kub thiab txias, yooj yim rau replicate, txheej txheem yooj yim, thiab tus nqi qis.
Tab sis qhov sib txuam nickel chromium nickel silicon them nyiaj choj siv yuam kev, thiab qhov sib npaug ntawm tus choj them nyiaj yog 0º C. Thaum qhov txias kawg kub yog 30º C. Tus pas ntsuas kub qhia qhov kub ntawm 900º C. Dab tsi yog qhov tseeb qhov kub ntawm qhov cub cua sov? Txiav txim siab cov khoom sib txawv ntawm qhov kub thiab txias siv cov txheej txheem electrode txoj cai.
Feem ntau, bimetallic thermometers yog siv rau qhov kub thiab txias, thaum cov thermocouples yog siv rau qhov kub thiab txias. Yog tias qhov kub siab tshaj 500 degrees, qhov kev tiv thaiv tus nqi ntawm bimetallic tus pas ntsuas kub yuav siab heev, uas yuav cuam tshuam rau kev ntsuas ntsuas, thiab txawm tias yuav ua rau cov xwm txheej ntsuas tsis tuaj yeem tau txais.
