Lambar Tag & Katin EPC

Kowane alamar EPC Gen2 yana da bankunan ƙwaƙwalwar ajiya 4, kowanne yana yin takamaiman manufa. Fahimtar wannan tsarin yana da mahimmanci don kodewa, karantawa, da amintar da alamun ku.

Banki 00 (An tanada): Ya ƙunshi Kalmar Sirri ta Kashe 32-bit da Kalmar Sirri ta 32-bit. Ƙimar tsoho shine 0x00000000. Kalmar sirri ta kashe naƙasassu na dindindin lokacin da aka aika. ba za a iya juyawa ba. Kalmar sirri ta shiga kulle bankunan ƙwaƙwalwar ajiya don hana rubuce-rubuce ba tare da izini ba.

Banki 01 (EPC): Ya ƙunshi StoredCRC (bits 16, ana ƙididdige kai tsaye), StoredPC/Protocol Control (bits 16, yana nuna tsawon EPC da iyawar alama), da ƙimar EPC da kanta. yawanci bits 96 (bytes 12) don SGTIN-96. Wasu alamomi suna goyan bayan 128-bit ko ma 496-bit EPCs.

Banki 10 (TID): Mai gano Alamar masana'anta. Ya ƙunshi lambar masana'anta na guntu, lambar samfuri, da lambar serial ta musamman. Wannan bankin karantawa ne kawai kuma ba za a iya canza shi ba. yana mai da shi mai mahimmanci don yaƙar ƙirƙira da tantance alama.

Banki 11 (Mai amfani): Ƙarin ajiyar zaɓi. Girman ya bambanta da guntu: NXP UCODE 9 yana da bits 0 (babu ƙwaƙwalwar mai amfani), Quanray QStar-7U yana da bits 512 (bytes 64). Yi amfani da shi don lambobin batch, kwanan wata dubawa, ƙofar zafin jiki, ko rikodin kulawa. Koyaushe bincika samfurin da ake da shi kafin rubutawa.

SGTIN-96 shine mafi yawan amfani da tsarin EPC. Yana encodes GTIN-14 (barcode samfurin ku) da lambar serial na musamman zuwa daidai bits 96 (bytes 12). Wannan yana ba da damar har zuwa biliyan 274 na lambobin serial na musamman a kowane nau'in samfur.

Tsarin bit 96: Header (bits 8, koyaushe 0x30 don SGTIN-96) → Filter (bits 3: 0=duk, 1=POS, 2=cikakken hali, 3=an tanada, 4=cikin gida, 5=an tanada, 6=nauyin naúrar, 7=bangaren) → Partition (bits 3: yana bayyana yadda ake raba bits tsakanin kamfanin prefix da abin da aka ambata) → Kamfanin Prefix (bits 20-40) → Abun da aka ambata (bits 4-24) → Lambar Serial (bits 38).

Darajar Partition (0-6) tana ƙayyade tsawon Kamfanin Prefix: P=0 → prefix bit 40 (lambobi 12), P=1 → bit 37 (lambobi 11), P=2 → bit 34 (lambobi 10), P=3 → bit 30 (lambobi 9), P=4 → bit 27 (lambobi 8), P=5 → bit 24 (lambobi 7), P=6 → bit 20 (lambobi 6). Tsawon kamfanin GS1 prefix ɗin ku yana ƙayyade wane darajar rarraba za a yi amfani da shi.

┌────────┬──────┬─────┬──────────────┬──────────────┬──────────────┐
│ Header │Filter│Part │Company Prefix│Item Reference│   Serial     │
│ 8 bits │3 bits│3bits│  20-40 bits  │   4-24 bits  │   38 bits    │
│  0x30  │ 0-7  │ 0-6 │  GS1 prefix  │  product ref │  unique ID   │
└────────┴──────┴─────┴──────────────┴──────────────┴──────────────┘

Partition table (defines prefix/item bit allocation):
P=0: 40-bit prefix (12 digits)  P=4: 27-bit prefix (8 digits)
P=1: 37-bit prefix (11 digits)  P=5: 24-bit prefix (7 digits)
P=2: 34-bit prefix (10 digits)  P=6: 20-bit prefix (6 digits)
P=3: 30-bit prefix (9 digits)

Example: 3034257BF7194E4000001A85
  Header=0x30 Filter=1 Part=5 Prefix=0614141
  Item=812345 Serial=6789 → GTIN-14: 80614141123458

Bayan SGTIN-96, GS1 ya ayyana wasu tsare-tsaren EPC 96-bit don masu gano sarkar samarwa daban-daban. Kowane yana da nasa byte na kai.

Karanta alamomi yayin kayan aiki yana da wucewa. mai karatu yana watsa tambaya kuma alamomi suna amsawa tare da EPC ɗinsu daga Banki 01. Amma kuma zaku iya karanta kowane bankin ƙwaƙwalwar ajiya ta hanyar aika umarnin KARANTA tare da lambar banki, offset kalma, da ƙidayar kalma.

Rubuta zuwa alamomi yana buƙatar ƙarin daidaito. Dole ne a singulate alamar (alama ɗaya kawai tana amsawa), kuma rubuce-rubuce suna faruwa kalma ɗaya (bits 16) a lokaci guda. Cikakken rubutun EPC mai bit 96 yana buƙatar rubutun kalma 6 na jere. Kowane rubutu yana ɗaukar 10-20ms, don haka encoding alama guda ɗaya yana ɗaukar 60-120ms don bayanan EPC kaɗai.

Rashin rubutu na gama gari: Alama ta yi nisa da eriya (yana buƙatar sigina mai ƙarfi don rubuce-rubuce fiye da karatu. kawo alamar cikin 1m). Alamomi da yawa a cikin filin (singulation ya gaza. ware alamar manufa). An kulle ƙwaƙwalwar alama (ana buƙatar kalmar sirri ta shiga). Rubuta tabbatarwa ya gaza (sake gwadawa, ko alamar na iya zama lahani. matsakaicin ƙimar lahani shine 1-3 a kowane 10,000).

TX → 5A 00 01 02 11 00 0C [EPC_12_BYTES] [CRC16]

Write per 16-bit word: 10-20ms
Full 96-bit EPC = 6 words = 60-120ms total

With access password:
TX → 5A 00 01 02 11 00 10 [PWD_4B] [EPC_12B] [CRC16]

Alamomin EPC Gen2 suna goyan bayan kalmomin sirri guda biyu na 32-bit don tsaro. Kalmar sirri ta Access tana kulle takamaiman bankunan ƙwaƙwalwar ajiya. da zarar an saita, wannan bankin yana buƙatar kalmar sirri kafin kowane karatu ko rubuta aiki. Kalmar sirri ta Kashe tana kashe alamar har abada lokacin da aka watsa ta. aiki mara juyawa da farko ana amfani dashi don keɓancewar mabukaci a cikin siyarwa (hallaka alamar bayan biyan kuɗi).

Mafi kyawun ayyukan tsaro: Kada a taɓa amfani da tsohuwar kalmar sirri ta sifili (0x00000000) a cikin samarwa. yana ba da sifili tsaro. Samar da kalmomin sirri na musamman a kowane rukunin alama ko amfani da prefix na kamfanin ku azaman iri. Ajiye kalmomin sirri a cikin tsarin ku na baya, ba a kan alamar kanta ba (ana iya karanta ƙwaƙwalwar kalmar sirri idan an buɗe alamar). Kulle bankunan kalmar sirri bayan shirye-shirye. Yi la'akari da yanayin Untraceable (samuwa akan sabbin guntuwa) wanda ke ɓoye TID kuma yana rage EPC, yana ba da sirri ba tare da kashe alamar ba.

GS1 Digital Link yana haɗa alamun RFID na zahiri tare da bayanan dijital da za a iya shiga yanar gizo. Yana canza bayanan EPC zuwa daidaitaccen URI wanda ke warware bayanan samfur, ayyukan tantancewa, sanarwar tunawa, ko bayanan dorewa.

Gudanawar: Tag EPC (misali, 3034257BF7194E4000001A85) → Fassara zuwa GTIN-14 (80614141123458) + Serial (6789) → Gina URI: https://id.gs1.org/01/80614141123458/21/6789. Wannan URI na iya warware zuwa shafin samfurin ku, API na tantancewa, ko kowane sabis da aka yi rajista a cikin hanyar sadarwar GS1 Digital Link.

Amfani mai amfani: Bincika tufafin da aka yiwa alama a cikin kantin sayar da kaya → URI yana warware umarnin kulawa da samfur, jagorar girma, da takaddun shaida na dorewa. Bincika magani mai alama → URI yana warware tantancewa (shin wannan samfurin gaskiya ne?), ranar karewa, da matsayin tunawa. Bincika kadarorin da aka yiwa alama → URI yana warware tarihin kulawa da jadawalin dubawa.