Raws li qhov xwm txheej ntawm cov khoom kuaj pom, lawv daim ntawv thov ntawm Magnetic Hall effect sensor tuaj yeem muab faib ua daim ntawv thov ncaj qha thiab daim ntawv thov tsis ncaj. Tus qub yog txhawm rau txheeb xyuas qhov sib nqus los yog cov yam ntxwv sib nqus ntawm cov khoom kuaj, thiab tom kawg yog txhawm rau txheeb xyuas cov khoom sib nqus ntawm cov khoom kuaj. Qhov no magnetic teb yog tus nqa khoom ntawm cov ntaub ntawv tshawb pom. Los ntawm nws, ntau yam uas tsis yog hluav taws xob thiab tsis sib nqus lub cev, xws li ceev, acceleration, lub kaum sab xis, angular tshaj tawm, revolutions, rotational ceev thiab lub sij hawm thaum lub sij hawm ua hauj lwm lub xeev hloov pauv mus rau hauv hluav taws xob kom muaj nuj nqis thiab tswj.
Hall effect sensors tau muab faib ua digital thiab analog hom raws li cov teeb liab tso zis.
Qhov tso zis hluav taws xob ntawm cov zis digital Hall effect sensors muaj kev sib raug zoo nrog kev siv cov khoom siv hlau nplaum.
Analog output Hall effect sensor muaj Hall caij, linear amplifier thiab emitter follower, uas outputs analog kom muaj nuj nqis.
Kev Ntsuas Kev Ntsuas
Ob daim hlau nplaum ruaj khov zoo liNeodymium hlau nplaummuab tso nrog tib polarity. Lub Digital Hall sensor tau muab tso rau hauv nruab nrab, thiab nws qhov sib nqus induction siv yog xoom. Qhov taw tes no tuaj yeem siv los ua qhov zero point ntawm kev hloov chaw. Thaum lub tsev sensor ua ib qho kev hloov pauv, lub sensor muaj qhov tso zis hluav taws xob, thiab qhov hluav taws xob ncaj qha ncaj qha rau kev hloov pauv.
Kev ntsuas quab yuam
Yog tias qhov tsis xws li qhov nro thiab lub siab hloov pauv mus rau qhov hloov pauv, qhov loj ntawm qhov nro thiab siab tuaj yeem ntsuas tau. Raws li txoj cai no, lub zog sensor tuaj yeem ua tau.
Kev ntsuas Angular Velocity
Muab ib daim hlau nplaum rau ntawm ntug ntawm lub disk ntawm cov khoom uas tsis yog hlau nplaum, tso lub Hall sensor ze ntawm ntug ntawm lub disk, tig lub disk rau ib lub voj voog, lub Hall sensor tso tawm cov mem tes, kom tus naj npawb ntawm revolutions ( counter) tuaj yeem ntsuas tau. Yog tias qhov ntsuas ntsuas tau txuas nrog, qhov ceev tuaj yeem ntsuas tau.
Linear Velocity Ntsuas
Yog hais tias lub switching Hall sensor tsis tu ncua nyob rau hauv txoj kev raws li txoj hauj lwm predetermined, lub mem tes teeb liab yuav raug ntsuas los ntawm kev ntsuas Circuit Court thaum cov hlau nplaum ruaj khov zoo li.Samarium Cobaltntsia rau ntawm lub tsheb txav mus los ntawm nws. Kev txav ceev ntawm lub tsheb tuaj yeem ntsuas tau raws li kev faib tawm ntawm cov teeb liab mem tes.
Kev siv Hall Sensor Technology hauv Kev Lag Luam Tsheb
Hall sensor tshuab yog dav siv nyob rau hauv kev lag luam tsheb, nrog rau lub zog, lub cev tswj, traction tswj thiab anti lock braking system
Daim ntawv ntawm Hall sensor txiav txim siab qhov sib txawv ntawm amplification Circuit Court, thiab nws cov zis yuav tsum hloov mus rau cov khoom tswj. Cov zis no yuav yog analog, xws li acceleration position sensor lossis throttle position sensor; los yog digital, xws li crankshaft lossis camshaft txoj hauj lwm sensor.
Thaum Hall lub ntsiab yog siv rau analog sensor, lub sensor no yuav siv tau rau tus pas ntsuas kub nyob rau hauv cov cua txias system los yog throttle txoj hauj lwm sensor nyob rau hauv lub hwj chim tswj system. Lub hauv paus ntsiab lus txuas nrog qhov sib txawv amplifier, thiab lub amplifier txuas nrog NPN transistor. Cov hlau nplaum ruaj khovNdFeB or SmCoyog tsau rau ntawm lub rotating ncej. Thaum lub shaft tig, lub magnetic teb nyob rau hauv lub chav tsev yog muaj zog. Lub Hall voltage generated yog proportional rau lub magnetic teb zog.
Thaum lub hauv paus ntsiab lus siv rau cov teeb liab, xws li crankshaft txoj hauj lwm sensor, camshaft txoj hauj lwm sensor los yog lub tsheb ceev sensor, lub Circuit Court yuav tsum tau hloov ua ntej. Lub hauv paus ntsiab lus txuas nrog qhov sib txawv amplifier, uas txuas nrog Schmidt trigger. Nyob rau hauv no configuration lub sensor outputs ib tug on los yog off teeb liab. Nyob rau hauv feem ntau automotive circuits, Hall sensors yog tam sim no absorbers los yog av teeb liab circuits. Txhawm rau ua kom tiav cov haujlwm no, NPN Transistor yuav tsum tau txuas nrog cov zis ntawm Schmitt trigger. Cov hlau nplaum hla dhau los ntawm cov khoom siv hauv tsev, thiab cov hniav ntawm lub log tsheb hla ntawm cov hlau nplaum thiab cov khoom siv.
Post lub sij hawm: Oct-25-2021