Hall Effect Measurement System

Xiamen Dexing Magnet Tech. Co., Ltd.

Dexing Magnet yog ib lub lag luam loj nrog kev ua haujlwm zoo thiab kev pabcuam zoo tshaj plaws hauv kev lag luam thoob ntiaj teb magnetometer thiab tshuab kev lag luam.

Vim Li Cas Xaiv Peb

Pab neeg tshaj lij

Nws muaj ib pab pawg neeg paub txog cov kws tshaj lij thiab cov thawj coj hauv kev lag luam magnetometer thiab magnetic industries.

Zoo heev

Nws tau tshaj tawm cov thev naus laus zis los ntawm Nyiv thiab Europe, koom tes nrog cov tsev kawm qib siab hauv tsev thiab cov chaw tshawb fawb tshawb fawb, thiab tuaj yeem tsim ua tiav cov khoom siv magnetoelectric.

Kev pabcuam zoo

Peb muab cov kev daws teeb meem zoo tshaj plaws, tsim kom tau raws li cov kev xav tau tshwj xeeb thiab cov kev xav tau ntawm peb cov neeg siv khoom.

One-stop Solution

Muab kev txhawb nqa, kev daws teeb meem, thiab kev pabcuam tu.

Dab tsi yog Hall Effect Measuring System?

Cov nyhuv Hall yog ib qho tshwm sim uas tsim qhov sib txawv ntawm qhov hluav taws xob ( Hall voltage) hla ib qho hluav taws xob conductor, transverse mus rau ib qho hluav taws xob tam sim no hauv tus neeg xyuas pib thiab mus rau ib qho kev siv magnetic teb perpendicular rau tam sim no.

Nkag siab thiab siv Hall Effect

Cov nyhuv Hall tau pom los ntawm Edwin Hall nyob rau xyoo 1879, tab sis nws tau ntau xyoo ua ntej kev tsim kho thev naus laus zis tau ua rau kev sib koom ua ke los ua kom zoo dua ntawm qhov tshwm sim no. Niaj hnub no, Hall effect sensor ICs muab txoj hauv kev yooj yim kom ua tiav qhov ntsuas tam sim no uas tswj cov hluav taws xob sib cais ntawm txoj kev ntsuas tam sim no thiab ntsuas hluav taws xob.

Los ntawm Lorentz mus rau Hall
Cov nyhuv Hall yog qhov txuas ntxiv ntawm Lorentz quab yuam, uas piav qhia txog lub zog ntawm cov khoom siv hluav taws xob-xws li hluav taws xob-tsav los ntawm qhov chaw sib nqus. Yog hais tias lub magnetic teb yog oriented perpendicular mus rau cov kev taw qhia ntawm lub electron lub zog, lub electron muaj ib tug quab yuam uas yog perpendicular rau ob qho tib si kev taw qhia ntawm kev txav thiab orientation ntawm lub magnetic teb.

Siv cov nyhuv Hall
Cov voltages generated los ntawm Hall nyhuv yog me me txheeb ze rau lub suab nrov, offsets, thiab kub tej yam kev mob uas feem ntau cuam tshuam rau ib tug Circuit Court, thiab yog li cov tswv yim sensors raws li Hall nyhuv tsis tau nthuav mus txog rau thaum kev loj hlob nyob rau hauv semiconductor technology tso cai rau ib tug heev integrated Cheebtsam uas muaj xws li ib tug ntau yam ntawm kev siv. Hall element thiab circuitry ntxiv uas xav tau los ua kom nrov nrov thiab kho lub Hall voltage. Tseem, txawm li cas los xij, Hall effect sensors raug txwv hauv lawv lub peev xwm los ntsuas qhov me me tam sim no. Piv txwv li, ACS712 los ntawm Allegro MicroSystems muaj qhov rhiab heev ntawm 185 mV / A. Qhov no txhais tau hais tias tam sim no ntawm 10 mA yuav tsim tawm qhov hluav taws xob tsuas yog 1.85 mV. Qhov hluav taws xob no tuaj yeem siv tau yog tias lub voj voog muaj suab nrov hauv pem teb, tab sis yog tias 2 Ω resistor tuaj yeem suav nrog hauv txoj kev tam sim no, qhov tshwm sim 20 mV tso zis voltage yuav yog qhov kev txhim kho loj.

Cov nyhuv Hall yog cuam tshuam rau ntau yam kev siv sensor; pab kiag li lawm raws li no kuj yooj yim kev sib raug zoo ntawm tam sim no, magnetic teb, thiab voltage yuav siv tau los ntsuas txoj hauj lwm, ceev, thiab magnetic teb zog. Hauv tsab xov xwm no, txawm li cas los xij, peb yuav tsom mus rau cov cuab yeej ntsuas tam sim no ntawm Hall voltage generated thaum lub magnetic teb induced los ntawm qhov ntsuas tam sim no yog concentrated mus rau ib tug integrated Hall nyhuv.

Pros thiab Cons
Cov yam ntxwv ntawm kev ua tau zoo sib txawv ntawm ib qho Hall effect tam sim no mus rau lwm qhov, yog li nws yog qhov nyuaj rau kev qhia meej meej qhov zoo thiab qhov tsis zoo ntawm Hall effect sensing txheeb ze rau lwm cov txheej txheem kev paub tam sim no; uas yog, ntxig ib tug precision resistor rau hauv txoj kev tam sim no thiab ntsuas qhov tshwm sim voltage poob nrog ib tug txawv amplifier. Feem ntau, txawm li cas los xij, Hall effect sensors muaj nuj nqis rau kev ua "nonintrusive" thiab muab hluav taws xob cais tawm ntawm txoj kev tam sim no thiab ntsuas hluav taws xob. Cov cuab yeej no suav hais tias tsis muaj kev cuam tshuam vim tias tsis muaj qhov tseem ceeb ntawm kev tiv thaiv tau muab tso rau hauv txoj kev tam sim no, thiab yog li qhov ntsuas hluav taws xob ntsuas yuav luag zoo li lub sensor tsis nyob. Ib qho txiaj ntsig ntxiv yog tias lub zog tsawg tsawg yog dissipated los ntawm lub sensor; qhov no yog qhov tseem ceeb tshwj xeeb thaum ntsuas cov dej ntws loj.

Hais txog qhov raug, tam sim no muaj Hall effect sensors tuaj yeem ua tiav qhov kev ua yuam kev tsawg li 1%. Ib qho zoo-tsim resistive tam sim no-sensitive Circuit Court yuav dhau qhov no, tab sis 1% feem ntau yuav tsim nyog nyob rau hauv high-tam sim no / high-voltage daim ntawv thov uas Hall effect pab kiag li lawm yog tshwj xeeb tshaj yog haum.

Muab cais nyob ib leeg
Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm Hall effect sensors yog kev sib cais hluav taws xob, uas nyob rau hauv Circuit Court- lossis system-design ntsiab lus feem ntau hu ua galvanic cais. Lub hauv paus ntsiab lus ntawm kev sib cais ntawm galvanic yog koom nrog thaum twg ib qho kev tsim kom muaj ob lub voj voog sib txuas lus hauv txoj hauv kev uas tiv thaiv txhua qhov ncaj qha ntawm hluav taws xob tam sim no. Ib qho piv txwv yooj yim yog thaum lub teeb liab digital dhau los ntawm opto-isolator, uas hloov cov hluav taws xob pulses mus rau lub teeb pulses thiab yog li xa cov ntaub ntawv optically es tsis yog hluav taws xob. Ib qho ntawm cov laj thawj tseem ceeb rau kev siv galvanic kev sib cais yog los tiv thaiv cov teeb meem cuam tshuam nrog av loops:

Cov hauv paus ntsiab lus tsim hluav taws xob xav tau tias cov khoom sib txuas sib txuas sib koom ua ke sib koom ua ke, uas yog suav tias yog ntawm 0 V. Nyob rau hauv lub neej tiag tiag, txawm li cas los xij, "hauv av node" yog tsim los ntawm cov conductors uas tsis muaj kev tiv thaiv, thiab cov conductors no pab. raws li ib txoj hauv kev rov qab rau tam sim no ntws los ntawm Circuit Court rov qab mus rau lub hwj chim mov. Ohm txoj cai ceeb toom peb tias tam sim no thiab tsis kam ua qhov voltage, thiab cov hluav taws xob poob rau hauv txoj kev rov qab los txhais tau tias "hauv av" hauv ib feem ntawm lub voj voog lossis qhov system tsis nyob rau tib lub peev xwm li "hauv av" hauv lwm qhov. Cov kev sib txawv ntawm cov peev txheej hauv av tuaj yeem ua rau muaj teeb meem xws li kev tsis saib xyuas txog kev puas tsuaj.

Los ntawm kev tiv thaiv ncaj qha tam sim no ntawm ob lub voj voog, kev sib cais ntawm galvanic enables circuits nrog cov hauv av sib txawv kom muaj kev sib txuas lus zoo. Qhov no yog tshwj xeeb tshaj yog muaj feem xyuam rau tam sim no-sensitive daim ntaub ntawv: ib tug low-voltage sensor thiab ua Circuit Court tej zaum yuav xav tau los soj ntsuam cov loj, kuj sib txawv tam sim no nyob rau hauv, piv txwv li, lub cev muaj zog tsav Circuit Court. Qhov loj, hloov pauv tam sim no yuav ua rau muaj kev hloov pauv loj heev hauv txoj kev rov qab los. Lub Hall effect sensor tso cai rau lub kaw lus los saib xyuas cov tsav tam sim no thiab tiv thaiv lub siab-precision sensor Circuit Court los ntawm cov kev cuam tshuam hauv av.

Common-Mode Voltage
Lwm daim ntawv thov tseem ceeb rau Hall effect sensors yog kev ntsuas tam sim no uas muaj cov hluav taws xob siab. Nyob rau hauv lub resistive tam sim no-sensitive Circuit Court, ib tug txawv amplifier ntsuas qhov sib txawv nyob rau hauv voltage ntawm ib sab ntawm ib tug resistor thiab lwm yam. Ib qho teeb meem tshwm sim, txawm li cas los xij, thaum cov voltages loj loj txheeb ze rau hauv av muaj peev xwm:

Lub neej tiag tiag amplifiers muaj qhov txwv "hom-hom ntau yam," txhais tau tias lub cuab yeej yuav tsis ua haujlwm zoo thaum cov input voltages, txawm tias me me rau ib leeg, yog qhov loj heev rau hauv av. Hom-hom ntau yam ntawm qhov tam sim no-sensitive amplifiers feem ntau tsis ntev tshaj li 80 lossis 100 V. Hall effect sensors, ntawm qhov tod tes, tuaj yeem hloov tam sim no mus rau qhov hluav taws xob yam tsis siv rau qhov ntsuas hauv av hauv av. Yog li ntawd, ntev npaum li qhov voltages tsis loj txaus ua rau lub cev puas tsuaj, hom hom voltage tsis cuam tshuam rau kev ua haujlwm ntawm Hall effect device.

Hall effect Sensors ua haujlwm li cas?

Thaum cov hluav taws xob tam sim no ntws los ntawm ib qho khoom siv, cov khoom siv hluav taws xob nyob rau hauv tam sim no ib txwm txav mus rau hauv txoj kab ncaj nraim, nrog cov hluav taws xob tsim nws tus kheej magnetic teb raws li nws tsub.

Yog tias cov khoom siv hluav taws xob tau muab tso rau nruab nrab ntawm cov ncej ntawm cov hlau nplaum ruaj khov, tsis txhob txav mus rau hauv txoj kab ncaj nraim, cov khoom siv hluav taws xob yuav hloov mus rau hauv txoj kev nkhaus thaum lawv txav los ntawm cov khoom siv. Qhov no tshwm sim vim lawv tus kheej magnetic teb yog reacting rau qhov sib txawv teb ntawm cov hlau nplaum tas mus li.

Raws li qhov tshwm sim ntawm qhov kev txav tshiab no, cov khoom siv hluav taws xob ntau dua tam sim no ntawm ib sab ntawm cov khoom siv hluav taws xob. Los ntawm qhov no, qhov muaj peev xwm sib txawv (lossis voltage) yuav tshwm sim thoob plaws cov khoom ntawm cov ces kaum sab xis mus rau qhov chaw sib nqus, los ntawm ob qho tib si cov hlau nplaum ruaj khov thiab ntws ntawm cov hluav taws xob tam sim no.

Yog li, Hall effect sensor ua haujlwm li cas?
Siv cov khoom siv hluav taws xob (xws li silicon), Hall effect sensors ua haujlwm los ntawm kev ntsuas qhov hloov pauv thaum lub cuab yeej muab tso rau hauv qhov chaw sib nqus. Hauv lwm lo lus, ib zaug Hall effect sensor pom tias nws tam sim no nyob rau hauv ib qho chaw sib nqus, nws muaj peev xwm paub qhov chaw ntawm cov khoom.

Hall effect sensors thiab hlau nplaum
Magnets yog intrinsic rau Hall nyhuv sensors, uas yog activated los ntawm lub xub ntiag ntawm ib tug sab nraud magnetic teb. Cov cuab yeej muaj peev xwm nkag siab zoo li cov khoom txav los ze dua lossis ntxiv mus, tsuas yog los ntawm qhov sib txawv ntawm qhov sib nqus ntawm qhov sib nqus.

Piv txwv li, yog tias Hall effect sensor tau muab tso rau hauv lub qhov rooj thiab cov hlau nplaum ntawm lub qhov rooj, lub sensor yuav tuaj yeem ntes thaum lub qhov rooj qhib lossis kaw los ntawm qhov muaj qhov sib nqus.

Tag nrho cov magnetic teb muaj ob yam tseem ceeb. Ua ntej, dab tsi yog hu ua 'flux density', uas yog hais txog tus nqi ntawm cov hlau nplaum ntws los ntawm ib cheeb tsam, thiab qhov thib ob, tag nrho cov hlau nplaum muaj ob lub polarities (sab qaum teb thiab sab qab teb).

Lub teeb liab tso zis uas tawm los ntawm Hall effect sensor sawv cev rau qhov ntom ntom ntawm cov hlau nplaum nyob ib ncig ntawm lub cuab yeej. Hall effect sensors muaj qhov pib ua ntej, thiab thaum qhov sib nqus flux ceev dhau qhov kev txwv no, lub cuab yeej tuaj yeem ntes cov hlau nplaum los ntawm kev tsim cov zis hu ua 'Hall Voltage'.

Hall effect sensors tag nrho muaj ib daim nyias nyias ntawm cov khoom siv semiconductor hauv lawv, uas dhau los ntawm cov hluav taws xob txuas ntxiv los ntawm nws tus kheej kom tsim tau ib qho chaw sib nqus. Thaum lub cuab yeej muab tso rau ze ntawm cov hlau nplaum sab nraud, cov hlau nplaum sib nqus ua rau lub zog ntawm cov khoom siv semiconductor, Lub zog no ua rau lub zog ntawm cov hluav taws xob, tsim kom muaj qhov ntsuas Hall voltage thiab ua kom lub Hall effect sensor.

Cov zis Hall voltage los ntawm Hall effect sensor yog ncaj qha proportional rau lub zog ntawm magnetic teb dhau los ntawm cov khoom semiconductor. Feem ntau, qhov tso zis hluav taws xob no me me - sib npaug tsuas yog ob peb lub microvolts - nrog rau ntau cov cuab yeej Hall nrog rau cov khoom siv hauv DC amplifiers, nrog rau cov logic-hloov circuits thiab voltage regulators, uas yog muaj los pab txhim kho qhov rhiab heev (thiab yog li ntawd kev ua tau zoo) ntawm tus ntaus ntawv.

Hall Effect Measurements tseem ceeb rau Characterizing High Carrier Mobility

Cov nyhuv Hall tuaj yeem pom thaum sib xyaw ua ke ntawm magnetic teb los ntawm cov qauv thiab tam sim no raws li qhov ntev ntawm cov qauv tsim hluav taws xob tam sim no perpendicular rau ob qho tib si magnetic teb thiab tam sim no, uas nyob rau hauv lem tsim ib tug transverse voltage perpendicular rau ob qho tib si. Lub hauv paus ntsiab lus yog Lorentz quab yuam: lub zog ntawm tus nqi taw tes vim yog electromagnetic teb

Kev ntsuas cov nyhuv ntawm Hall yog qhov tseem ceeb rau cov khoom siv semiconductor txawm tias lawv yog silicon-based, compound semiconductors, nyias cov ntaub ntawv rau lub hnub ci hlwb, lossis cov ntaub ntawv nanoscale xws li graphene. Cov kev ntsuas cuam tshuam tsis zoo (cov ntaub ntawv doped semiconductor siab heev, kub superconductors, dilute magnetic semiconductors, thiab GMR / TMR cov ntaub ntawv) thiab cov khoom siv hluav taws xob siab, suav nrog cov khoom siv hluav taws xob semiconductor, gallium nitride, thiab cadmium telluride.

Kev ntsuas qhov cuam tshuam Hall yog qhov tseem ceeb rau kev txiav txim siab ntau yam khoom siv, tab sis qhov tseem ceeb yog Hall voltage (VH). Carrier txav, carrier concentration (n), Hall coefficient (RH), resistivity, magnetoresistance (RB), thiab cov cab kuj conductivity hom (N lossis P) yog tag nrho los ntawm Hall voltage.

Raws li cov kws tshawb fawb tsim cov ICs tiam tom ntej thiab cov khoom siv semiconductor zoo dua, lawv txaus siab tshwj xeeb rau cov ntaub ntawv nrog cov neeg nqa khoom siab, uas yog qhov ua rau muaj kev txaus siab rau graphene. Qhov no ib-atom-tuab daim ntawv ntawm cov pa roj carbon monoxide quantum Hall nyhuv thiab, vim li ntawd, relativistic electron tam sim no ntws. Cov kws tshawb fawb xav txog Hall effect ntsuas tseem ceeb rau yav tom ntej ntawm kev lag luam hluav taws xob

Cov ntaub ntawv uas muaj cov neeg nqa khoom siab muaj peev xwm tso cai rau tsim cov khoom siv uas tau txais qhov siab tshaj plaws tam sim no ntawm qib qis zog nrog lub sij hawm hloov ceev thiab siab dua bandwidth. Kev tswj hwm ntawm Ohm Txoj Cai qhia tau hais tias qhov tseem ceeb ntawm kev thauj mus los hauv kev ua kom tiav tam sim no. Cov tam sim no ncaj qha proportional rau cov cab kuj

Cov kev xaiv rau kev ua kom lub zog tam sim no los ntawm ib lub cuab yeej suav nrog kev nce voltage, them tus nqi thauj khoom, qhov chaw hla ntawm cov qauv, lossis kev txav mus los ntawm tus nqi thauj khoom. Tag nrho tab sis qhov kawg ntawm cov no muaj qhov tsis zoo loj.

Ntsuas Mobility
Thawj kauj ruam hauv kev txiav txim siab cov neeg nqa khoom txav mus los yog ntsuas Hall voltage (VH) los ntawm kev quab yuam ob qho tib si magnetic teb perpendicular rau tus qauv (B) thiab tam sim no los ntawm tus qauv (I). Qhov kev sib xyaw ua ke no tsim ib qho kev hloov pauv tam sim no. Qhov tshwm sim muaj peev xwm (VH) yog ntsuas thoob plaws lub cuab yeej. Kev ntsuas raug ntawm ob qho tib si qauv thickness (t) thiab nws cov resistivity (r) kuj yuav tsum tau. Qhov kev tiv thaiv tuaj yeem txiav txim siab siv plaub-point sojntsuam lossis van der Pauw cov txheej txheem ntsuas. Nrog tsuas yog tsib qhov kev txwv no (B, I, VH, t, thiab resistivity), Hall kev txav mus los yuav suav tau:
Ob leeg Hall voltages thiab ntsuas van der Pauw resistivity yog feem ntau me me, yog li kev ntsuas txoj cai thiab qhov nruab nrab yog qhov tseem ceeb rau cov txiaj ntsig kev txav mus los.

Vim li cas cov hlau nplaum tas mus li xav tau hauv Hall Effect Sensors

Hall effect sensor los yog Hall effect transducer yog ib qho kev sib xyaw ua ke raws li Hall effect thiab tsim los ntawm 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 hauv cov txheej txheem ntawm kev siv, koj yuav pom tias cov hlau nplaum ruaj khov yog ib qho tseem ceeb ua haujlwm.

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: Kev taw qhia tam sim no,

B: Kev taw qhia ntawm sab nraud magnetic teb,

V: Hall voltage, thiab cov dots me me hauv lub thawv tuaj yeem suav tias yog hluav taws xob.

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, SmCo thiab NdFeB cov hlau nplaum tsis tshua muaj hauv ntiaj teb 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 li Hall effect transducer hlau nplaum.

Peb lub Hoobkas

Dexing Magnet yog nyob rau hauv lub nroog Xiamen, Tuam Tshoj uas yog ib tug zoo nkauj ceg av qab teb thiab lub thoob ntiaj teb seaport, nrog rau lub Hoobkas nyob rau hauv Jiangsu, Zhejiang Tuam Tshoj, tau tsim nyob rau hauv 1985, lub qub yog ib tug tub rog Hoobkas, tshawb fawb thiab tsim kev sib txuas lus qhov chaw, qhov no Tom qab ntawd qhov chaw tau txais los ntawm Dexing Group hauv 1995.

FAQ

Q: Dab tsi yog Hall effect ntsuas qhov system?

A: Cov nyhuv Hall yog qhov tshwm sim uas ua rau qhov sib txawv ntawm qhov sib txawv (Hall voltage) hla tus neeg xyuas pib hluav taws xob, hloov mus rau qhov hluav taws xob tam sim no hauv tus neeg xyuas pib thiab mus rau qhov chaw siv hlau nplaum perpendicular rau tam sim no.

Q: Txoj kev ntsuas Hall yog dab tsi?

A: Ib qho yooj yim Hall effect ntsuas configuration yuav muaj xws li cov nram qab no Cheebtsam thiab kev xaiv ntxiv: Ib qhov tam sim no-tam sim no qhov chaw ntawm ib tug magnitude uas yog nyob ntawm tus qauv qhov tsis kam. Rau cov qauv uas tsis tshua muaj zog, qhov chaw yuav tsum muaj peev xwm tso tawm los ntawm milliamps mus rau amps ntawm tam sim no.

Q: Dab tsi yog qhov yooj yim txhais ntawm Hall effect?

A: Cov nyhuv Hall yog deflection ntawm electrons (qhov) nyob rau hauv ib tug n-hom (p-type) semiconductor nrog tam sim no ntws perpendicular mus rau ib tug magnetic teb. Lub deflection ntawm cov cab kuj tau teeb tsa ib qhov hluav taws xob, hu ua Hall voltage, uas nws polarity nyob ntawm tus nqi ntawm cov cab kuj.

Q: Cov nyhuv Hall tso cai rau peb txiav txim siab li cas?

A: Conversely, yog hais tias lub magnetic teb yog paub, cov nyhuv Hall yuav siv tau los qhia lub drift tshaj tawm ntawm electrons thiab lwm yam microscopic kom muaj nuj nqis rau cov khoom uas lub Hall sojntsuam yog tsim. Cov nyhuv Hall tso cai rau peb txiav txim siab tias nws yog cov nqi tsis zoo uas ntws, thiab tsis yog cov nqi zoo.

Q: Dab tsi yog Hall effect rau dummies?

A: Cov nyhuv Hall yog txav ntawm electrons los ntawm tus neeg xyuas pib mus rau qhov chaw sib nqus. Nws ua rau qhov ntsuas qhov sib txawv ntawm qhov sib txawv ntawm tus neeg xyuas pib xws li ib sab yog qhov zoo thiab qhov tsis zoo.

Q: Dab tsi yog Hall cuam tshuam tam sim no ntsuas?

A: Hall-effect tam sim no sensing enables real-time tswj nyob rau hauv lub hnub ci inverter systems nrog ntxiv zog ua hauj lwm voltages mus txog 1,100 V. Hall-effect tam sim no sensors enables tam sim no ntsuas rau rails siab li 1,100 V, nrog ntxiv dag zog cais los xyuas kom meej kev ruaj ntseg ntawm lwm yam system electronics.

Q: Lub Hall effect ntsuas ceev li cas?

A: Yog hais tias lub Hall lub ntsiab yog ntsia ze rau lub turntable, thaum turntable tig nrog lub ncej, lub Hall lub ntsiab yog cuam tshuam los ntawm magnetic teb generated los ntawm cov hlau nplaum, yog li nws outputs pulse teeb liab uas nws zaus yog proportional rau ceev, ces ceev yuav xam tau. los ntawm kev ntsuas lub sijhawm pulse lossis zaus.

Q: Dab tsi yog Hall cov nyhuv tuaj yeem siv rau kev ntsuas?

A: Hall effect tuaj yeem siv los ntsuas qhov tam sim no los ntawm cov hlau nplaum uas tsim tawm vim qhov ntws ntawm qhov tam sim no.

Q: Puas yog Hall effect muaj tseeb rau cov hlau thiab semiconductors?

A: Nws hais tias yog ib qho qauv (hlau lossis semiconductor) nqa tam sim no (I) muab tso rau hauv qhov chaw sib nqus sib nqus (B), qhov hluav taws xob hluav taws xob yog induced nyob rau hauv cov kev taw qhia perpendicular rau kuv thiab B.

Q: Vim li cas Hall effect tseem ceeb heev?

A: Cov nyhuv Hall tuaj yeem siv los ntsuas qhov ceev ntawm cov neeg nqa khoom tam sim no, lawv txoj kev ywj pheej ntawm kev txav mus los, lossis kev txav mus los, nrog rau txhawm rau txheeb xyuas qhov muaj tam sim no ntawm qhov chaw sib nqus.

Q: Lub hauv paus ntsiab lus ntawm Hall effect yog dab tsi?

A: Lub hauv paus ntsiab lus ntawm Hall effect tau hais tias thaum tus neeg nqa khoom nqa tam sim no lossis lub semiconductor tau nkag mus rau qhov chaw sib nqus sib nqus, qhov voltage tuaj yeem ntsuas ntawm lub kaum sab xis mus rau txoj kev tam sim no. Qhov txiaj ntsig ntawm qhov tau txais qhov ntsuas hluav taws xob ntsuas tau hu ua Hall effect.

Q: Lub hom phiaj ntawm Hall effect yog dab tsi?

A: Cov nyhuv Hall yog qhov yooj yim rau cov khoom siv hauv lub xeev thiab cov cuab yeej kuaj xyuas tseem ceeb rau cov yam ntxwv ntawm cov ntaub ntawv - tshwj xeeb yog semi-conductors. Nws muab kev txiav txim ncaj qha ntawm ob qho tib si kos npe ntawm cov neeg nqa khoom, xws li electron lossis qhov (appendix A), thiab lawv qhov ntom ntom hauv cov qauv muab.

Q: Dab tsi yog Hall effect hauv kev ntsuas?

A: Raws li qhov tshwm sim, cov nyhuv Hall yog qhov tseem ceeb heev uas yog txhais tau tias ntsuas cov cab kuj los yog qhov sib nqus. Ib qho tseem ceeb heev ntawm cov nyhuv Hall yog qhov sib txawv ntawm cov nqi zoo txav mus rau hauv ib qho kev taw qhia thiab cov nqi tsis zoo txav mus rau qhov sib txawv.

Q: Dab tsi yog Hall effect siv rau hauv lub neej tiag?

A: Cov ntawv thov rau Hall-effect ICs suav nrog kev siv hluav taws xob hauv hluav taws xob, kev tswj ceev, kev ruaj ntseg, kev tswj hwm kev sib raug zoo, micrometers, kev txwv tsis pub siv tshuab, khoos phis tawj, tshuab luam ntawv, disk drives, keyboards, tshuab cuab yeej, keyboards tseem ceeb, thiab lub laub khawm hloov.

Q: Dab tsi tuaj yeem txiav txim siab los ntawm Hall effect?

A: Cov nyhuv hauv chav tsis tuaj yeem siv los txiav txim siab qhov chaw sib nqus, uas tsis ua rau perpendicular rau kev taw qhia ntawm hluav taws xob.

Q: Koj tuaj yeem pom dab tsi los ntawm kev siv Hall effect?

A: Yog li, cov nyhuv Hall yog siv los ntsuas cov nqi thauj khoom ntawm cov khoom siv hluav taws xob lossis cov khoom siv hluav taws xob thiab cov hluav taws xob tsim los ntawm cov hlau nplaum.

Q: Dab tsi yog qhov essence ntawm Hall effect?

A: Hauv qhov tseem ceeb, Hall Effect yog txhua yam hais txog cov neeg nqa khoom them nqi (feem ntau, cov khoom siv hluav taws xob) txav mus rau hauv ib qho kev taw qhia ntawm lub kaum sab xis mus rau ob qho tib si hluav taws xob tam sim no thiab qhov chaw sib nqus.

Q: Lub cuab yeej Hall effect ntsuas qhov hloov pauv li cas?

A: Siv cov khoom siv hluav taws xob (xws li silicon), Hall effect sensors ua haujlwm los ntawm kev ntsuas qhov hloov pauv thaum lub cuab yeej muab tso rau hauv qhov chaw sib nqus. Hauv lwm lo lus, ib zaug Hall effect sensor pom tias nws tam sim no nyob rau hauv ib qho chaw sib nqus, nws muaj peev xwm paub qhov chaw ntawm cov khoom.

Q: Lub hom phiaj ntawm Hall ntsuas yog dab tsi?

A: Kev ntsuas ntawm Hall effect thiab cov resistivity muab cov ntaub ntawv muaj txiaj ntsig xws li cov cab kuj ceev, kev txav mus los ntawm cov cab kuj, thiab hom cab kuj. Cov cab kuj ceev yog tus naj npawb ntawm cov cab kuj ntawm ib lub ntim ntawm cov khoom, thiab rau cov khoom siv semiconductors, muaj feem xyuam rau cov doping ntawm semiconductor.

Q: Lub Hall effect ntsuas tam sim no li cas?

A: Lawv muaj xws li Hall effect sensor mounted nyob rau hauv qhov sib txawv ntawm ib tug sib nqus core. Cov zis tawm los ntawm Hall effect sensor yog amplified thiab ntsuas lub teb tsim los ntawm tam sim no yam tsis muaj kev sib cuag nrog nws. Qhov no muab galvanic cais ntawm Circuit Court thiab lub sensor.

Raws li ib qho ntawm cov kev ntsuas ntsuas qhov system manufacturers thiab cov neeg muag khoom nyob rau hauv Suav teb, peb sov siab txais tos koj mus yuav cov khoom siv hluav taws xob ntsuas hluav taws xob los ntawm peb lub hoobkas. Tag nrho cov khoom siv nrog cov khoom zoo thiab cov nqi sib tw.