Lub kaw lus tiv thaiv kev xauv lub kaw lus (ABS) saib xyuas qhov tsis sib xws ntawm lub tsheb lub zog raws li kev nyeem cov sensors ntsia ntawm ib lossis ntau lub log.Kawm txog dab tsi ABS sensor yog dab tsi thiab vim li cas nws thiaj li xav tau, hom twg nws yog, nws ua haujlwm li cas thiab cov hauv paus ntsiab lus ntawm nws txoj haujlwm yog raws li - paub los ntawm tsab xov xwm.
Dab tsi yog ABS sensor
ABS sensor (kuj tsheb ceev sensor, DSA) yog ib qho tsis sib cuag sensor ntawm qhov ceev ntawm kev sib hloov (los yog ceev) ntawm lub log ntawm lub tsheb nruab nrog ntau yam hluav taws xob muaj kev ruaj ntseg tshuab thiab pab tswj lub tshuab.Cov ntsuas ntsuas ceev yog lub ntsiab ntsuas ntsuas uas ua kom muaj kev ua haujlwm ntawm lub kaw lus kaw lub kaw lus (ABS), kev tswj hwm kev ruaj ntseg (ESC) thiab tswj kev sib tw.Tsis tas li ntawd, kev nyeem ntawv sensor yog siv nyob rau hauv qee qhov kev tswj tsis siv neeg kis tau tus mob, ntsuas lub log tsheb, hloov teeb pom kev zoo thiab lwm yam.
Tag nrho cov tsheb niaj hnub thiab ntau lwm lub tsheb log yog nruab nrog ceev sensors.Nyob rau hauv lub tsheb neeg nrog caij, sensors raug ntsia rau ntawm txhua lub log, nyob rau hauv lub tsheb ua lag luam thiab tsheb thauj khoom, sensors yuav muab ntsia tau rau ob leeg ntawm tag nrho cov log thiab nyob rau hauv tsav qag sib txawv (ib tug ib qag).Yog li, lub kaw lus tiv thaiv kev kaw lub kaw lus tuaj yeem saib xyuas cov xwm txheej ntawm txhua lub log lossis lub log ntawm lub log tsav, thiab raws li cov ntaub ntawv no, hloov pauv kev ua haujlwm ntawm lub braking system.
Hom ntawm ABS sensors
Tag nrho DSAs uas twb muaj lawm tau muab faib ua ob pawg loj:
• Passive – inductive;
• Active — magnetoresistive thiab raws li Hall sensors.
Passive sensors tsis tas yuav siv hluav taws xob sab nraud thiab muaj cov qauv yooj yim tshaj plaws, tab sis lawv muaj qhov raug qis thiab muaj qhov tsis zoo, yog li niaj hnub no lawv siv tsawg.Active ABS sensors xav tau lub zog ua haujlwm, yog qhov nyuaj me ntsis hauv kev tsim thiab kim dua, tab sis muab kev nyeem ntawv tseeb tshaj plaws thiab muaj kev ntseeg siab hauv kev ua haujlwm.Yog li ntawd, niaj hnub no active sensors raug ntsia rau ntawm lub tsheb feem ntau.
DSA ntawm txhua hom muaj ob hom:
• Ncaj (kawg);
•Keb.
Direct sensors muaj daim ntawv ntawm lub tog raj kheej los yog pas nrig, nyob rau ntawm ib kawg ntawm ib tug kawg ntawm lub sensor yog ntsia, nyob rau lwm yam - ib tug connector los yog hlau nrog ib tug connector.Lub kaum sab xis sensors tau nruab nrog lub kaum sab xis txuas lossis cov xaim nrog lub txuas, thiab lawv kuj muaj cov yas lossis hlau bracket nrog lub qhov ntsia hlau.
Tsim thiab ua haujlwm ntawm ABS inductive sensors
Qhov no yog qhov yooj yim tshaj plaws ceev sensor hauv kev tsim thiab kev ua haujlwm.Nws yog ua raws li lub qhov txhab inductor nrog nyias tooj liab hlau, nyob rau hauv uas muaj cov hlau nplaum ruaj khov thiab muaj zog hlau nplaum hlau.Qhov kawg ntawm lub coil nrog ib tug sib nqus core yog nyob rau sab nraum lub hlau iav log (mem tes rotor), rigidly mounted ntawm lub log hub.Cov hniav rotor muaj cov duab plaub, qhov kev ncua deb ntawm cov hniav yog sib npaug los yog me ntsis siab dua lawv qhov dav.
Kev ua haujlwm ntawm qhov ntsuas no yog ua raws li qhov tshwm sim ntawm electromagnetic induction.Thaum so, tsis muaj tam sim no nyob rau hauv lub sensor kauj, vim nws nyob ib puag ncig los ntawm ib qho chaw sib nqus tas li - tsis muaj teeb liab ntawm qhov tso zis ntawm lub sensor.Thaum lub tsheb txav mus, cov hniav ntawm lub pulse rotor dhau los ze ntawm cov hlau nplaum ntawm lub sensor, uas ua rau muaj kev hloov pauv hauv cov hlau nplaum uas dhau los ntawm lub kauj.Yog li ntawd, lub magnetic teb ua alternating, uas, raws li txoj cai ntawm electromagnetic induction, generates ib tug alternating tam sim no nyob rau hauv lub kauj.Qhov tam sim no sib txawv raws li txoj cai ntawm sine, thiab qhov zaus ntawm kev hloov tam sim no nyob ntawm qhov ceev ntawm kev sib hloov ntawm lub rotor, uas yog, ntawm lub tsheb ceev.
Inductive ceev sensors muaj qhov teeb meem tseem ceeb - lawv pib ua haujlwm tsuas yog thaum muaj qee qhov ceev tau kov yeej thiab tsim lub teeb liab tsis muaj zog.Qhov no ua rau nws ua tsis tau rau ABS thiab lwm lub tshuab ua haujlwm ntawm qhov nrawm thiab feem ntau ua rau muaj kev ua yuam kev.Yog li ntawd, passive DSAs ntawm hom inductive niaj hnub no muab txoj hauv kev rau cov neeg ua haujlwm siab dua.
Tsim thiab ua haujlwm ntawm cov sensors ceev raws li Hall lub caij
Sensors raws li Hall cov ntsiab lus feem ntau yog vim lawv qhov yooj yim thiab kev ntseeg tau.Lawv yog raws li Hall nyhuv - qhov tshwm sim ntawm ib tug transverse muaj peev xwm sib txawv nyob rau hauv ib tug dav hlau neeg xyuas pib muab tso rau hauv ib tug sib nqus teb.Xws li ib tug neeg xyuas pib yog ib tug square hlau phaj muab tso rau hauv ib tug microcircuit (Hall integrated circuit), uas kuj muaj ib tug ntsuas hluav taws xob Circuit Court uas generates ib tug digital teeb liab.Cov nti no tau nruab rau hauv lub ntsuas ntsuas ceev.
Raws li txoj cai, DSA nrog Hall lub ntsiab yog qhov yooj yim: nws yog raws li lub microcircuit, tom qab uas muaj cov hlau nplaum ruaj khov, thiab cov hlau phaj hlau-magnetic core tuaj yeem nyob ib puag ncig.Tag nrho cov no yog muab tso rau hauv ib rooj plaub, nyob rau sab nraum qab ntawm uas muaj ib tug hluav taws xob connector los yog ib tug conductor nrog ib tug connector.Lub sensor nyob rau sab nraud ntawm lub mem tes rotor, uas tuaj yeem ua rau hauv daim ntawv ntawm cov iav hlau los yog lub nplhaib nrog cov hlau nplaum, cov mem tes rotor yog rigidly mounted ntawm lub log hub.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm Hall sensor yog raws li hauv qab no.Lub Hall integrated circuit tas li tsim cov teeb liab digital nyob rau hauv daim ntawv ntawm square pulses ntawm ib qho zaus.Thaum so, qhov teeb meem no muaj tsawg zaus los yog tsis muaj kiag li.Thaum pib ntawm lub zog ntawm lub tsheb, cov seem magnetized los yog rotor hniav dhau los ntawm lub sensor, uas entails ib tug kev hloov nyob rau hauv lub tam sim no nyob rau hauv lub sensor - qhov kev hloov no yog saib xyuas los ntawm cov kev ntsuam xyuas Circuit Court, uas generates cov zis teeb liab.Qhov zaus ntawm cov teeb liab mem tes nyob ntawm qhov ceev ntawm kev sib hloov ntawm lub log, uas yog siv los ntawm kev tiv thaiv kev xauv lub kaw lus.
DSA ntawm hom no yog tsis muaj qhov tsis zoo ntawm inductive sensors, lawv tso cai rau koj los ntsuas qhov ceev ntawm kev sib hloov ntawm lub log los ntawm thawj centimeters ntawm lub tsheb txav, yog qhov tseeb thiab txhim khu kev qha hauv kev ua haujlwm.
Tsim thiab ua haujlwm ntawm anisotropic magnetoresistive ceev sensors
Magnetoresistive ceev sensors yog raws li cov nyhuv anisotropic magnetoresistive, uas yog ib qho kev hloov ntawm hluav taws xob tsis kam ntawm ferromagnetic cov ntaub ntawv thaum lawv orientation hloov mus rau ib tug tas li magnetic teb.
Lub ntsiab tseem ceeb ntawm lub sensor yog "txheej txheej ncuav mog qab zib" ntawm ob los yog plaub daim nyias nyias permalloy (ib qho tshwj xeeb hlau-nickel alloy), uas siv cov hlau conductors, faib cov magnetic teb kab nyob rau hauv ib txoj kev.Cov paib thiab cov neeg xyuas pib tau muab tso rau hauv ib qho kev sib koom ua ke, uas tseem nyob hauv qhov kev ntsuam xyuas Circuit Court los tsim cov teeb liab tawm.Cov nti no tau nruab rau hauv lub sensor nyob rau sab nraud ntawm lub mem tes rotor - lub nplhaib yas nrog cov hlau nplaum.Lub nplhaib yog rigidly mounted ntawm lub log hub.
Kev ua haujlwm ntawm AMR sensors boils mus rau hauv qab no.Thaum so, qhov tsis kam ntawm ferromagnetic daim hlau ntawm lub sensor tseem tsis hloov pauv, yog li cov teeb liab tso zis tsim los ntawm kev sib xyaw ua ke kuj tsis hloov lossis tsis tuaj yeem ua tiav.Thaum lub tsheb txav mus, cov seem hlau nplaum ntawm lub nplhaib mem tes dhau los ntawm qhov ntsuas qhov ntsuas qhov ntsuas, uas ua rau qee qhov kev hloov pauv ntawm cov kab sib nqus.Qhov no ua rau muaj kev hloov pauv ntawm qhov tsis kam ntawm daim hlau permalloy, uas tau soj ntsuam los ntawm kev ntsuas ntsuas hluav taws xob - vim li ntawd, lub teeb liab pulsed digital yog tsim los ntawm cov zis ntawm lub sensor, qhov zaus uas yog proportional rau qhov ceev ntawm lub tsheb.
Nws yuav tsum tau muab sau tseg tias magnetoresistive sensors tso cai rau koj mus taug qab tsis tau tsuas yog lub ceev ntawm kev sib hloov ntawm lub log, tab sis kuj cov kev taw qhia ntawm lawv kev sib hloov thiab lub sij hawm ntawm nres.Qhov no yog ua tau vim muaj cov mem tes rotor nrog cov seem magnetized: lub sensor saib tsis tau tsuas yog qhov kev hloov ntawm lub magnetic teb, tab sis kuj raws li ib feem ntawm txoj kev ntawm cov magnetic ncej dhau los ntawm lub sensing caij.
DSAs ntawm hom no yog qhov txhim khu kev qha tshaj plaws, lawv muab cov neeg raug siab hauv kev ntsuas qhov ceev ntawm kev sib hloov ntawm lub log thiab kev ua haujlwm zoo ntawm cov tshuab kev nyab xeeb ntawm lub tsheb.
Lub hauv paus ntsiab lus ntawm kev khiav hauj lwm ntawm ceev sensors raws li ib feem ntawm ABS thiab lwm yam systems
Anti-lock braking systems, tsis hais cov sensors ntsia hauv lawv, muaj tib txoj cai ntawm kev ua haujlwm.Lub ABS tswj chav saib xyuas cov teeb liab los ntawm cov sensors ceev thiab muab piv nrog cov ntsuas ntsuas ua ntej ntawm kev ceev thiab nrawm ntawm lub tsheb (cov ntsuas no yog tus kheej rau txhua lub tsheb).Yog hais tias lub teeb liab los ntawm lub sensor thiab cov tsis tau sau tseg nyob rau hauv lub control unit coincide, lub system yog inactive.Yog hais tias lub teeb liab los ntawm ib los yog ntau lub sensors deviates los ntawm tus tsim tsis (uas yog, lub log yog thaiv), ces lub kaw lus muaj nyob rau hauv lub nres system, tiv thaiv qhov tshwm sim tsis zoo ntawm kev xauv lub log.
Xav paub ntau ntxiv txog kev ua haujlwm ntawm kev tiv thaiv kev sib tsoo thiab lwm yam kev ruaj ntseg hauv lub tsheb tuaj yeem pom nyob rau hauv lwm cov khoom ntawm lub xaib.
Post lub sij hawm: Aug-24-2023