Qhov tseem ceeb tshaj plaws kev tivthaiv kev tivthaiv, tus tivthaiv, yuav zoo li cov yam khoom yooj yim nrog ob peb daim ntawv sau npe, tab sis cov resistors muaj ntau hom kev siv thiab hom .
Tso cua sov
Joule cua sov yog lub cua sov tsim ua tam sim no dhau los ntawm ib tug resistor. Feem ntau cov cua sov no yog qhov tseem ceeb tshaj nyob rau hauv kev xaiv ntawm ib lub resistor kom ntseeg tau khiav lag luam, tab sis nyob rau hauv ib co kev siv, lub hom phiaj ntawm lub resistor yog los ua kom sov. Lub tshav kub yog tsim los ntawm kev sib txuas nrog cov electrons ntws los ntawm tus neeg xyuas pib, cuam tshuam rau nws cov atoms thiab ions, yeej tseem ceeb generating kub los ntawm kev sib txhuam. Cov khoom cua kub ua kom tsis raug mob yog siv ntau yam khoom xws li hluav taws xob fais fab thiab lub ncu, cov fais fab fais fab, cov tshuab kas fes, thiab lub xov tooj ntawm lub tsheb. Cov cua sov ua kom tsis sov yog feem ntau nrog lub tshuab hluav taws xob kom pom tseeb tias tsis muaj dab tsi yuav hla lub caij ua haujlwm hauv lub lag luam uas yog qhov tseem ceeb tshaj yog nyob rau hauv cov hluav taws kub cov dej kub uas siv lub qhov cub ua kom sov. Txhim khu kev ua tau zoo ntawm cov khoom cua ntawm cov khoom siv tiv thaiv tau siv xws li nichrome, ib qho kev sib tw ntawm nickel thiab chromium, uas yog qhov mob heev thiab tiv taus oxidation.
Fuse
Cov khoom siv tshwj xeeb uas yog cov qauv siv feem ntau yog siv ib zaug xwb. Lub caij hluav taws xob nyob hauv ib qho hluav taws xob yog tsim los tua nws tus kheej thaum muaj ib qho chaw nquam nplej tam sim no, tshwj xeeb yog kev txi nws tus kheej kom tiv thaiv kev puas tsuaj rau cov khoom kim kim kim. Fuses muaj ntau yam khoom siv los muab sijhawm ceev ceev los sis qeeb, lub sijhawm tam sim no thiab qhov muaj peev xwm, thiab qhov kub qhov twg. Lawv kuj muaj nyob rau hauv ntau yam qauv xws li cov ntaub fais siv fuses siv nyob rau hauv kev lag luam automotive, iav fused fuses lub fuses, cylindrical fiberglass cartridge fuses, thiab ntswj hauv fuses rau npe ob peb. Cov fuses fais fab tuag yog pheej yig heev, tab sis cov fuse kev siv hluav taws xob rov qab txo qhov tsim nyog rau tus neeg siv los nrhiav thiab hloov lub fuse thiab feem ntau siv cov cuab yeej kim thiab cov khoom siv hluav taws xob uas tsis yog siv los ntawm tus neeg siv thiab tuaj yeem nqes tau cov nqi hluav taws xob ntau dua .
Sensors
Resistors feem ntau siv los ua cov sensors rau ntau hom kev siv los ntawm cov roj sensors mus dag detectors. Kev pauv hauv kev tuaj yeem tuaj yeem tshwm sim los ntawm ntau yam xws li dej thiab lwm yam kua, noo noo, lim los yog khaus, thiab nqus cov roj mus rau cov ntaub ntawv tiv taus. Los ntawm xaiv cov khoom siv thiab cov ntaub thaiv zoo, qhov kev ua tau ntawm ib tus cwj pwm tsis taus kuj tuaj yeem txiav txim siab rau ib daim ntawv thov thiab ib cheeb tsam. Cov khoom ua tsis sib haum xeeb yog siv los ua ib feem ntawm cov khoom siv ntawm cov khoom siv hauv polygraph los soj ntsuam lub hauv pliag ntawm ib qho kev kawm hauv lub sijhawm tiag tiag thaum lawv mus kuaj xyuas. Raws li qhov kev kawm pib hais, ib qho cwj pwm tsis taus yog cuam tshuam los ntawm kev hloov hauv dej noo thiab muab kev hloov hauv kev ntsuas. Cov roj ua kom tsis muaj teeb meem zoo li qub, nrog ib qhov muaj roj ntau dua qhov ua rau muaj kev hloov pauv ntawm qhov kev tawm tsam ntawm lub sensor. Nyob ntawm tus qauv tsim, tus kheej calibration yuav ua tau tiav los ntawm kev siv ib tug siv tam sim no rau lub sensor tshem tag nrho cov kua nplaum ntawm cov khoom ua kom hnov qab.
Rau cov sensors uas hloov me me dhau ntawm tag nrho cov stimuli, lub choj fais fab tuag yog feem ntau siv los qhia qhov kev ntsuas ruaj ruaj rau ntau yam kev ntsuam thiab kev ua kom nrov.
Lub teeb
Thomas Edison siv tshawb nrhiav cov khoom siv uas tsim hluav taws xob ruaj ruaj. Raws li txoj kev, nws nrhiav tau ntau ntawm cov duab thiab cov ntaub ntawv uas yuav tsim ib co teeb thiab tam sim ntawd hlawv nws tus kheej tawm, zoo li lub fuse sacrificing nws tus kheej. Ntev mus, Edison pom muaj cov khoom siv thiab tsim muaj lub teeb nruam uas yog ib qho tseem ceeb tshaj plaws thiab tseem ceeb tshaj plaws ntawm kev siv cov resistors rau ntau xyoo lawm. Niaj hnub no muaj nyob rau ntawm lub teeb pom kev zoo ntawm lub teeb pom kev zoo thiab ib txhia yog cov qauv ntawm cov qauv xws li halogen qij. Incandescent teeb yog raug hloov los ntawm CCLF thiab LED teeb, uas muaj zog ntau npaum li lub zog ntawm lub qhov hluav taws xob uas muaj zog tuaj.