Relay: Cov neeg saib xyuas uas ntsiag to ntawm hluav taws xob tswj hwm
Relay yog cov hluav taws xob sib xyaw uas siv cov ntsiab lus hluav taws xob kom ua tiav Circuit Court tswj. Vim tias nws tau tsim los ntawm Joseph Henry xyoo 1835, nws tau dhau los ua ib feem tsis muaj feem ntawm cov hluav taws xob hluav taws xob niaj hnub. Qhov no zoo li cov cuab yeej yooj yim plays lub luag haujlwm tseem ceeb hauv kev tswj hluav taws xob.
Tus txheej txheem ua hauj lwm ntawm cov relay yog raws indectromagnetic induction. Thaum lub coil yog energized, ib daim teb sib nqus yog tsim tawm, uas nyiam cov armature kom txav, yog li tsav cov kev tiv tauj kom qhib thiab kaw. Cov txheej txheem no paub txog txoj haujlwm ntawm kev tswj cov dej ntws loj nrog me me voltages nrog cov hluav taws xob tsawg. Noj cov 12v DC relay ua piv txwv, nws lub kauj fais fab kev siv hluav taws xob feem ntau tsuas yog}, thiab qhov ua kom pom tseeb}.}
Nyob rau hauv teb ntawm kev muaj tshuab automation, kev caij tsheb yog ib qho ntawm cov tseem ceeb ntawm kev tswj hwm. Lawv tau siv dav hauv PLCS (programrictric controllers) los tswj qhov pib thiab nres ntawm cov khoom siv xws li cov khoom siv hluav taws xob thiab cov khoom siv solenoid thiab solenoid li qub. Piv txwv li, ntawm txoj kab ntau lawm, pua pua ntawm kev caij tsheb kauj vab yuav raug ua haujlwm ua ke kom paub tseeb ntawm txhua tus txheej txheem.
Daim ntawv thov cov xwm txheej ntawm kev rov qab muaj ntau dua li cov teb muaj kev lag luam. Hauv cov khoom siv hauv yim neeg, kev tswj hwm cov tub yees thiab cov phiaj xwm hloov chaw ntawm cov tshuab ntxhua khaub ncaws yog inseparable los ntawm relays; Hauv cov khoom siv fais fab, relay tiv thaiv cov khoom siv tuaj yeem txiav tawm cov kev ua kom muaj kev ruaj ntseg ntawm lub hwj chim ntawm lub hwj chim; Hauv cov khoom siv hluav taws xob hauv tsheb, rov qab tswj hwm cov haujlwm xws li lub teeb thiab wipers. Raws li kev txheeb cais, lub tsheb zoo tib yam yuav nruab nrog 20-30 sib txawv hom relays.
Nrog kev nce qib ntawm thev naus laus zis, cov tshiab rov qab xws li muaj kev sib txuas lus tseem ceeb hauv ntau thaj chaw vim lawv txoj kev ntseeg siab thiab tus nqi qis. Qhov kev tsim no, uas tau yug ze li ntawm ob caug xyoo dhau los, tseem muaj kev tiv thaiv kev tiv thaiv rau cov txheej txheem hluav taws xob ntawm cov txheej txheem niaj hnub no.
