Hall effect sensor los yog Hall effect transducer yog ib qho kev sib xyaw ua ke raws li Hall effect thiab muaj xws li Hall element thiab nws qhov chaw pabcuam. Hall sensor yog siv dav hauv kev tsim khoom, kev thauj mus los thiab lub neej txhua hnub. Los ntawm cov qauv sab hauv ntawm lub tsev sensor, los yog nyob rau hauv tus txheej txheem ntawm kev siv, koj yuav pom tias covhlau nplaum ruaj khovyog ib feem tseem ceeb ua haujlwm. Vim li cas cov hlau nplaum tas mus li yuav tsum tau rau Hall sensors?
Ua ntej tshaj plaws, pib los ntawm kev ua haujlwm ntawm Hall sensor, Hall Effect. Hall Effect yog ib yam ntawm cov nyhuv electromagnetic, uas tau tshawb pom los ntawm American physicist Edwin Herbert Hall (1855-1938) hauv 1879 thaum kawm txog cov txheej txheem ntawm cov hlau. Thaum qhov tam sim no dhau los ntawm tus neeg xyuas pib perpendicular mus rau sab nraud magnetic teb, cov cab kuj deflects, thiab ib qho hluav taws xob ntxiv yuav raug tsim tawm perpendicular mus rau cov kev taw qhia ntawm tam sim no thiab magnetic teb, uas ua rau muaj peev xwm sib txawv ntawm ob qho tag nrho ntawm tus neeg xyuas pib. Qhov tshwm sim no yog Hall effect, uas tseem hu ua Hall muaj peev xwm sib txawv.
Cov nyhuv Hall yog qhov tseem ceeb ntawm qhov deflection ntawm txav cov khoom siv los ntawm Lorentz quab yuam hauv magnetic teb. Thaum cov khoom siv hluav taws xob (electrons lossis qhov) raug kaw hauv cov khoom siv, qhov deflection no ua rau cov tsub zuj zuj ntawm qhov zoo thiab qhov tsis zoo nyob rau hauv cov kev taw qhia perpendicular mus rau tam sim no thiab magnetic teb, yog li tsim ib qho ntxiv transverse electric teb.
Peb paub tias thaum cov hluav taws xob txav mus rau hauv qhov chaw sib nqus, lawv yuav raug cuam tshuam los ntawm Lorentz quab yuam. Raws li saum toj no, cia peb xub saib daim duab ntawm sab laug. Thaum lub electron txav mus rau pem hauv ntej, qhov tam sim no generated los ntawm nws txav downward. Zoo, cia peb siv txoj cai sab laug, cia cov kab sib nqus sib nqus ntawm cov hlau nplaum B (steev rau hauv qhov screen) nkag mus rau hauv xib teg ntawm tes, uas yog, xib teg ntawm tes yog sab nraud, thiab taw tes plaub ntiv tes rau hauv kev taw qhia tam sim no, uas yog, plaub lub ntsiab lus nqes. Tom qab ntawd, qhov kev taw qhia ntawm tus ntiv tes xoo yog qhov kev taw qhia lub zog ntawm lub tshuab hluav taws xob. Cov electrons raug yuam mus rau sab xis, yog li cov nqi hauv lub phaj nyias yuav qaij mus rau ib sab nyob rau hauv qhov kev txiav txim ntawm sab nraud magnetic teb. Yog tias lub tshuab hluav taws xob tig mus rau sab xis, lub peev xwm sib txawv yuav raug tsim nyob rau sab laug thiab sab xis. Raws li pom hauv daim duab ntawm sab xis, yog tias lub voltmeter txuas nrog rau sab laug thiab sab xis, qhov voltage yuav raug kuaj pom. Qhov no yog lub hauv paus ntsiab lus ntawm Hall induction. Qhov kuaj pom voltage hu ua Hall induced voltage. Yog hais tias sab nraud magnetic teb raug tshem tawm, Hall voltage ploj. Yog tias sawv cev los ntawm cov duab, Hall effect zoo li cov duab hauv qab no:
i: tam sim no kev taw qhia, B: kev taw qhia ntawm sab nraud magnetic teb, V: Hall voltage, thiab cov dots me me nyob rau hauv lub thawv yuav suav hais tias yog electrons.
Los ntawm txoj cai ua haujlwm ntawm Hall sensor, nws tuaj yeem pom tias Hall effect sensor yog lub zog sensor, uas yuav tsum xav tau cov khoom siv hluav taws xob sab nraud thiab cov hlau nplaum ua haujlwm. Xav txog cov kev xav tau ntawm cov ntim me me, lub teeb yuag, kev siv hluav taws xob tsawg thiab siv tau yooj yim hauv daim ntawv thov ntawm lub sensor, ib qho yooj yim mus tas li hlau nplaum es tsis yog ib qho nyuaj electromagnet yog siv los muab cov khoom sib nqus sab nraud. Ntxiv mus, nyob rau hauv plaub yam tseem ceeb ntawm cov hlau nplaum ruaj khov,SmCothiabNdFeB tsis tshua muaj ntiaj tebCov hlau nplaum muaj qhov zoo xws li cov khoom sib nqus siab thiab kev ua haujlwm ruaj khov, uas tuaj yeem ua kom muaj kev ua haujlwm siab Hall effect transducer lossis sensor kom ncav cuag qhov tseeb, rhiab heev, thiab kev ntsuas txhim khu kev qha. Yog li NdFeB thiab SmCo siv ntau dua liHall effect transducer hlau nplaum.
Post lub sij hawm: Sep-10-2021