Yintoni inkqubo yonxibelelwano lwedatha?
I-CAN unxibelelwano lwebhasi
Uthungelwano lweNdawo yoMlawuli (CAN) ibhasi luthotho lweprotocol yebhasi eyenzelwe usetyenziso lwexesha lokwenyani. Inokuhambisa imiqondiso ngaphezulu kwesibini esijijekileyo, intambo ye-coaxial, okanye i-fiber optical. Ngenxa yokusebenza kwayo okuphezulu, ukuthembeka okuphezulu, kunye neempawu zexesha lokwenyani ezibalaseleyo, i-CAN ibe yenye yezona bhasi zamkelweyo kwihlabathi jikelele.
Okwangoku, unxibelelwano lwe-CAN yeyona ndlela yonxibelelwano yeenkqubo zolawulo lwebhetri (BMS). Iyacetyiswa ngamandla kwaye iphunyezwe ngokubanzi kwiinkqubo zolawulo lwebhetri yemoto yombane yasekhaya kunye neyamazwe ngamazwe, kunye nakwimigangatho yonxibelelwano lwedatha ye-BMS eTshayina nakwamanye amazwe. Ezinye iiprothokholi zebhasi ezifana ne-RS232 kunye ne-RS485 zikwasetyenziswa kunxibelelwano lwangaphakathi lweenkqubo zolawulo lwebhetri.
Unxibelelwano lweFlexRay
Ngophuhliso lwetekhnoloji ye-elektroniki yeemoto, izisombululo ze-CAN zemveli aziselolona khetho lufanelekileyo lokujongana nemingeni yonxibelelwano lwezithuthi. NgoSeptemba ka-2000, i-BMW kunye ne-DaimlerChrysler, ngentsebenziswano ne-Philips kunye ne-Motorola, baseka i-FlexRay Consortium ukuze baphuhlise inkqubo entsha yonxibelelwano kwaye bayikhuthaze njengeprothokholi esemgangathweni ye-powertrain ephuculweyo, i-chassis, kunye ne-X{2}}by{3}}iinkqubo zocingo.
I-FlexRay ibonelela ngezinto ezininzi eziphambili ezingenazo zemveli kwi-imigaqo yonxibelelwano lwemoto (efana ne-CAN), kuquka:
(1) Iqondo loThutho oluPhezuluIjelo ngalinye leFlexRay libonelela nge-bandwidth ye-10 Mbit / s. I-FlexRay inokusebenza njengenkqubo enye{2}}yetshaneli (efana ne-CAN okanye i-LIN networks) okanye njengenkqubo ye-channel -emibini, ifumana umlinganiselo wothumelo oluphezulu lwe-20 Mbit/s-20 amaxesha aphezulu kunesantya esiphezulu sokusebenza sothungelwano lwangoku lwe-CAN.
(2) ISiseko sexesha esilungelelanisiweyoIndlela yokufikelela esetyenziswa kwiFlexRay isekwe kwisiseko sexesha lehlabathi esilungelelanisiweyo. Esi siseko sexesha sisekwe ngokuzenzekelayo kwaye silungelelaniswe yiprotocol kwaye yenziwe ifumaneke kumaleko wesicelo. Ukuchaneka kwesiseko sexesha phakathi kwe-0.5 μs kunye ne-10 μs (ngokuqhelekileyo i-1-2 μs).
(3) Unxibelelwano oluqinisekileyoUnxibelelwano kwi-FlexRay lwenzeka ngokuphindaphinda imijikelo yonxibelelwano, apho imiyalezo ethile inikwa izikhundla ezimiselweyo (slots) ngaphakathi komjikelo. Ngenxa yoko, umamkeli uyazi kwangaphambili ukuba umyalezo uza kufika nini. Ukutenxa okwethutyana kwamaxesha okufika komyalezo kuncinci kakhulu kwaye kuqinisekisiwe.
(4) Ukunyamezela iFault HighUbunakho obunamandla bokubona impazamo kunye{0}}nokunyamezela ukusebenza ngonyamezelo yingqwalasela yoyilo oluphambili kwiFlexRay.
- Ibhasi yeFlexRay isebenzisa iCyclic Redundancy Check (CRC) ukubona iimpazamo zonxibelelwano.
- Ngonxibelelwano-ezimbini, iFlexRay ibonelela ngokungasebenzi.
- Ngokusebenzisa itopology yenkwenkwezi (okanye indibaniselwano yetopology), iFlexRay inokujongana ngokupheleleyo nempazamo-iimfuno zonyamezelo, kuquka{1}inqaku elinye{2}lo{3}}lokungaphumeleli kokunciphisa.
(5) Ukuba bhetyebhetyeUkuguquguquka kwakuyeyona nto iphambili ekugxilwe kuyo ngexesha lokuphuhliswa kweFlexRay protocol kwaye ibonakaliswe kule miba ilandelayo: ① Ixhasa i-topology ezininzi zenethiwekhi (ibhasi, inkwenkwezi, i-hybrid, njl.); ② Ubude bomyalezo obulungiselelwayo: ubude bomthwalo wedatha bunokulungelelaniswa kwiimfuno ezithile zesicelo solawulo; ③ Xa usebenzisa -itopology yetshaneli ezimbini, la majelo mabini angasetyenziselwa ukunyusa umda okanye ukuhambisa imiyalezo engafunekiyo; ④ Ubude becandelo le-static kunye neguquguqukayo ngaphakathi komjikelo wonxibelelwano lunokulungelelaniswa ngokweemfuno ezithile zesicelo.
I-Ethernet yoshishino
I-Industrial Ethernet yinethiwekhi yedijithali evuleke ngokupheleleyo. Izixhobo ezivela kubavelisi abahlukeneyo zinokufikelela ngokulula kunxibelelwano ngokuthobela iiprotocol zenethiwekhi eziqhelekileyo. Inika amazinga onxibelelwano aphezulu: I-Ethernet esheshayo kunye nesantya se-10 Mbit / s kunye ne-100 Mbit / s yamkelwe ngokubanzi, iteknoloji ye-Gigabit Ethernet ikhulile, kwaye i-10 Gbit / s Ethernet iphantsi kophando olusebenzayo kunye nophuhliso. Ezi ntlawulo ziphezulu kakhulu kunezo zeebhasi zangoku.
Nangona kunjalo, i-Ethernet yamashishini isajongene nemingeni emininzi, eyona nto ibandakanya:
- Ixesha lokwenyani{0}}lokusebenza
- Ukuguquguquka kunye nokuthembeka kwiindawo ezinzima zoshishino
- Ubukho bosetyenziso -loluhlu lwemigaqo elandelwayo lulungele ulawulo oluzenzekelayo kwimizi-mveliso
Ngenkqubela phambili eqhubekayo yetekhnoloji ye-Ethernet yeshishini, le miba ingentla isonjululwa ngokuthe ngcembe.
