Cov nyhuv Hall tau txais nws lub npe los ntawm tus kws tshawb fawb E. G. Hall, uas tau tshawb pom nws xyoo 1879 thaum ua haujlwm nrog cov phaj kub nyias. Cov nyhuv yog qhov tshwm sim ntawm qhov hluav taws xob thaum lub phaj conductive muab tso rau hauv qhov chaw sib nqus. Qhov voltage no hu ua Hall voltage. Daim ntawv thov kev lag luam ntawm cov nyhuv no tau ua tau tsuas yog 75 xyoo tom qab kev tshawb pom, thaum cov yeeb yaj kiab semiconductor nrog qee yam khoom pib tsim. Qhov no yog li cas lub Hall sensor tau tshwm sim, lub hauv paus ntsiab lus ntawm kev ua haujlwm uas yog raws li cov txiaj ntsig ntawm tib lub npe. Qhov no sensor yog ib qho cuab yeej rau kev ntsuas lub zog ntawm lub magnetic teb. Ntau lwm yam khoom siv kuj tau tsim los ntawm nws lub hauv paus: sensors ntawm angular thiab linear hloov chaw, magnetic teb, tam sim no, ntws, thiab lwm yam. Lub Hall sensor muaj ntau qhov zoo, ua tsaug rau nws tau dhau los ua dav. Ua ntej, non-contact actuation eliminates mechanical wear. Qhov thib ob, nws yog ib qho yooj yim siv ntawm tus nqi qis. Thib peb, cov cuab yeej muaj qhov me me. Plaub, qhov kev hloov pauv ntawm cov lus teb zaus tsis ua rau muaj kev hloov pauv ntawm lub sijhawm ntsuas. Fifthly, hluav taws xob teeb liab ntawm lub sensor tsis muaj lub cim tawg, thiab thaum qhib tam sim ntawdnce tus nqi tas li. Nws lwm qhov zoo yog: teeb liab kis tau tus mob yam tsis muaj kev cuam tshuam, tsis sib cuag ntawm lub teeb liab kis nws tus kheej, xyaum ua haujlwm tsis txwv lub neej, ntau zaus ntau, thiab lwm yam. Txawm li cas los xij, nws kuj muaj nws qhov tsis zoo, qhov tseem ceeb ntawm kev nkag siab rau electromagnetic cuam tshuam hauv lub zog hluav taws xob thiab kub hloov pauv.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm Hall sensor. Lub Hall sensor yog ib lub qhov-qhov qauv nrog ib tug semiconductor ntawm ib sab thiab ib tug mus tas li hlau nplaum nyob rau lwm yam. Thaum ib tug tam sim no ntws nyob rau hauv ib tug magnetic teb, ib tug quab yuam ua nyob rau hauv lub electrons, lub vector ntawm uas yog perpendicular mus rau lub tam sim no thiab lub teb. Hauv qhov no, muaj peev xwm sib txawv tshwm sim ntawm ob sab ntawm lub phaj. Nyob rau hauv qhov sib txawv ntawm lub sensor muaj ib qho screen uas cov kab quab yuam raug kaw. Nws tiv thaiv kev tsim muaj peev xwm sib txawv ntawm lub phaj. Yog tias tsis muaj qhov screen hauv qhov sib txawv, tom qab ntawd nyob rau hauv qhov kev txiav txim ntawm cov hlau nplaum, qhov sib txawv yuav raug tshem tawm ntawm lub phaj semiconductor. Thaum lub vijtsam (rotor hniav) hla dhau qhov sib txawv, qhov induction ntawm qhov sib xyaw ua ke yuav yog xoom, thiab qhov hluav taws xob yuav tshwm sim ntawm qhov tso zis.
Lub Hall sensor thiab cov khoom siv raws li nws tau siv dav hauv aviation, tsheb, instrumentation thiab ntau lwm yam lag luam. Lawv tau tsim los ntawm cov tuam txhab muaj npe nrov xws li Siemens, Micronas Intermetall, Honeywell, Melexis, Analog Device thiab ntau lwm tus.
Qhov feem ntau yog qhov hu ua tus yuam sijHall sensor, qhov tso zis ntawm qhov kev hloov pauv ntawm lub hauv paus ntsiab lus yog tias lub magnetic teb tshaj ib qho nqi. Cov sensors no tshwj xeeb tshaj yog siv dav hauv brushless electric motors li rotor position sensors (RPS). Hall logic sensors yog siv nyob rau hauv synchronization li, ignition systems, nyeem ntawv ntawm magnetic cards, yuam sij, contactless relays, thiab lwm yam. Integral linear sensors tau siv dav, uas yog siv los ntsuas cov kab tawm lossis lub kaum sab xis thiab hluav taws xob tam sim no.
