Hall sensors yog raws li Hall nyhuv. Cov nyhuv Hall yog ib txoj hauv kev los kawm txog cov khoom ntawm cov khoom siv semiconductor. Lub Hall coefficient ntsuas los ntawm Hall effect kev sim tuaj yeem txiav txim siab qhov tseem ceeb xws li hom conductivity, carrier concentration thiab carrier txav ntawm cov khoom semiconductor.
Kev faib tawm
Hall sensors muab faib ua linear Hall sensors thiab switching Hall sensors.
1. Linear Hall sensor muaj Hall element, linear amplifier thiab emitter follower, thiab outputs analog kom muaj nuj nqis.
2. Lub tshuab hloov-hom Hall sensor yog tsim los ntawm lub zog tswj hluav taws xob, Hall lub ntsiab lus, lub suab sib txawv, Schmitt trigger thiab theem tso zis, thiab tso tawm cov lej digital.
Cov khoom ua los ntawm cov khoom siv semiconductor raws li cov nyhuv Hall yog hu ua Hall element. Nws muaj qhov zoo ntawm kev nkag siab zoo rau cov hlau nplaum sib nqus, yooj yim hauv cov qauv, me me loj, dav hauv cov lus teb zaus, loj hauv cov zis voltage variation thiab ntev hauv kev pab cuam lub neej. Yog li ntawd, nws tau siv dav hauv kev ntsuas, automation, computer thiab cov ntaub ntawv thev naus laus zis.
Mib app
Hall nyhuv sensors yog dav siv raws li txoj hauj lwm sensors, rotational ceev ntsuas, txwv keyboards thiab txaus ntsuas. Qee cov khoom siv ua haujlwm raws li Hall effect, xws li Hall effect tam sim no sensors, Hall effect nplooj hloov, thiab Hall effect magnetic field zog sensors. Tom ntej no, txoj hauj lwm sensor, rotational speed sensor thiab kub los yog siab sensor yog mas piav.
1. Qhov chaw sensor
Hall effect sensors yog siv los txiav txim siab zawv zawg zog, nyob rau hauv hom sensor no yuav tsum nruj tswj qhov sib txawv ntawm lub hauv paus ntsiab lus thiab cov hlau nplaum, thiab induced magnetic teb yuav hloov raws li cov hlau nplaum txav mus los ntawm qhov sib txawv ruaj. Thaum lub caij nyob ze ntawm tus ncej qaum teb, lub teb yuav tsis zoo, thiab thaum lub caij nyob ze ntawm tus ncej qab teb, qhov chaw sib nqus yuav zoo. Cov sensors no tseem hu ua qhov sib thooj sensors thiab siv rau qhov tseeb qhov chaw.
2. Ceev sensor
Hauv kev ntsuas nrawm, Hall effect sensor tau muab tso rau hauv lub ntsej muag tig lub hlau nplaum. Qhov no rotating hlau nplaum generates lub magnetic teb yuav tsum tau ua hauj lwm lub sensor los yog Hall lub caij. Cov txheej txheem ntawm cov hlau nplaum tig tuaj yeem sib txawv, nyob ntawm qhov yooj yim ntawm daim ntawv thov. Qee qhov kev npaj no yog los ntawm kev txhim kho ib qho hlau nplaum rau ntawm tus ncej lossis hub lossis siv lub nplhaib hlau nplaum. Hall sensor emits cov zis mem tes txhua zaus nws ntsib cov hlau nplaum. Tsis tas li ntawd, cov pulses yog tswj los ntawm processor los txiav txim thiab tso saib qhov ceev hauv RPM. Cov sensors no tuaj yeem yog digital lossis linear analog tso zis sensors.
3. Kub lossis siab sensor
Hall effect sensors kuj tseem siv tau los ua lub siab thiab kub sensors, cov sensors no tau ua ke nrog lub siab deflecting diaphragm nrog cov hlau nplaum tsim nyog, thiab cov hlau nplaum sib nqus ntawm lub hauv caug ua rau lub Hall nyhuv rov qab.
Nyob rau hauv cov ntaub ntawv ntawm kev ntsuas siab, lub hauv caug yuav raug nthuav thiab contraction. Cov kev hloov pauv hauv cov kab hauv qab ua rau lub rooj sib nqus sib nqus txav mus ze rau Hall effect element. Yog li ntawd, lub resulting output voltage yog proportional rau lub siab thov.
Nyob rau hauv cov ntaub ntawv ntawm kev ntsuas kub, lub tshuab nqus tsev twj tso kua mis yog kaw nrog ib tug roj nrog paub thermal expansion yam ntxwv. Thaum lub chamber yog rhuab, cov roj hauv lub hauv siab nthuav dav, uas ua rau lub ntsuas hluav taws xob tsim kom muaj qhov sib npaug ntawm qhov ntsuas kub.
Post lub sij hawm: Nov-16-2022