Kev kub ceev CAN thiab qis-ceev CAN yog ob txoj kev sib txuas lus tsheb npav CAN feem ntau siv hauv kev lag luam tsheb niaj hnub no.CAN, tseem hu ua Controller Area Network, yog cov txheej txheem kev sib txuas lus siv los sib txuas lus ntawm ntau lub tshuab hluav taws xob tswj (ECUs) hauv ib qho tsheb. Txawm hais tias ob qho tib si high-ceev CAN thiab qis-ceev CAN yog raws li tib txoj cai, muaj qee qhov sib txawv ntawm cov nqi, kev sib kis deb, thaj tsam ntawm daim ntawv thov thiab kev siv scenarios.
Ua ntej, tus nqi ntawm high-speed CAN thiab qis-ceev CAN yog txawv. Kev kub ceev CAN feem ntau xa cov ntaub ntawv ntawm tus nqi ntawm 500 kbps (kilobits ib ob), thaum qis-ceev CAN feem ntau kis ntawm 100 kbps. high-speed CAN yog siv rau hauv cov ntawv thov uas xav tau cov ntaub ntawv siab rau kev sib txuas lus, xws li lub cav tswj tshuab, sensors thiab actuators. Tsawg-ceev CAN yog siv rau cov ntawv thov uas xav tau cov ntaub ntawv qis dua, xws li kev nplij siab hauv tsheb thiab kev lom zem.
Qhov thib ob, kuj tseem muaj qhov sib txawv ntawm kev sib kis ntawm kev kub ceev CAN thiab qis-ceev CAN. Txij li thaum qhov kis tau tus mob ntawm high-ceev CAN yog siab dua, qhov kev ncua deb yog luv dua, feem ntau tsis tshaj 40 meters. Tsawg-ceev CAN, ntawm qhov tod tes, muaj qhov sib kis tau ntev txog li 100 meters. Qhov no yog vim lub teeb liab attenuation thiab suab nrov cuam tshuam yuav cuam tshuam cov ntaub ntawv kis tau tus mob zoo ntawm high-speed CAN ntawm kev sib kis ntev dua.
Tsis tas li ntawd, qhov Scope ntawm daim ntawv thov ntawm high-speed CAN thiab low-speed CAN yog txawv. Kev kub ceev CAN feem ntau yog siv rau hauv kev tswj hwm uas xav tau cov ntaub ntawv xa mus rau lub sijhawm tiag tiag, xws li lub cav, kev sib kis thiab kev tswj xyuas nres. Nws muab high-speed, txhim khu kev qha cov ntaub ntawv xa mus los xyuas kom meej lub sij hawm ua tau zoo thiab raug. Tsawg-ceev CAN feem ntau yog siv rau cov kev tswj tsis tseem ceeb xws li kev lom zem hauv tsheb thiab kev nplij siab. Cov kev tswj hwm no xav tau cov ntaub ntawv hloov pauv tsawg thiab kev ua haujlwm ntawm lub sijhawm, uas qis-ceev tuaj yeem ua tiav.
Thaum kawg, kev kub ceev CAN thiab qis ceev CAN siv nyob rau hauv cov xwm txheej sib txawv. Kev kub ceev CAN feem ntau yog siv nyob rau hauv subsystems uas yuav tsum tau loj npaum li cas ntawm cov ntaub ntawv pauv, xws li automotive engine tswj units, kis tswj units, thiab ABS (anti-lock braking system). Tsawg-ceev CAN feem ntau yog siv rau hauv cov tshuab uas yuav tsum muaj kev tswj xyuas cov ntaub ntawv sib kis tsawg dua, xws li cov teeb pom kev zoo sab hauv thiab lub tshuab suab.
Nyob rau hauv cov ntsiab lus, high-speed CAN thiab low-speed CAN, raws li kev sib txuas lus hauv tsheb npav CAN hauv kev lag luam tsheb niaj hnub, muaj cov nqi sib txawv, kev sib kis, kev siv ntau yam thiab kev siv scenarios. Kev kub ceev CAN yog tsim rau cov kev tswj hwm uas xav tau cov ntaub ntawv siab, lub sijhawm thiab qhov tseeb, thaum lub sijhawm ceev CAN yog qhov tsim nyog rau cov kev tswj hwm uas tsis tshua muaj kev xav tau rau cov ntaub ntawv tus nqi thiab lub sijhawm. Kev lag luam tsheb xaiv qhov tsim nyog CAN tsheb npav raws tu qauv raws li kev xav tau sib txawv txhawm rau ua kom tau raws li cov kev xav tau ntawm kev sib txuas lus ntawm lub tsheb.