The difference between RFID technology and NFC Technology
Author:Wenling Time:2021-06-06 13:34 Browse(220)
K4083
RFID:1 l6 w7 o8 V2 |6 t+ Z# o# J' u' e  t) vMany people's perceptual knowledge of RFID comes from an IBM advertisement: a young man who is shopping in a supermarket is packing goods into his windbreaker while shopping, and then goes to the cash register to collect the bill directly without paying for it.
this advertisement vividly shows people the application of RFID technology in daily life.
this advertisement shows us the application of RFID technology in daily life4 l" \! w$ @: r; O& v1 i/ _ - j4 ?: D) [& r7 k6 H: o.

The difference between RFID technology and NFC Technology

\) y       RFID(radio frequency Identification is an automatic identification technology that uses radio waves for communication.
the basic principle is to realize data communication through the electromagnetic coupling or inductive coupling between the reader head and the label attached to the object.
automatic identification refers to the application of a certain identification device.
through the proximity activity between the identified object and the identification device, It is a technology to automatically obtain the related information of the identified items and provide it to the background computer processing system to complete the related follow-up processing.
it is a kind of technology to automatically obtain the related information of the identified items and provide it to the background computer processing system to complete the related follow-up processing$ d7 T% }2 n) p# A6 Z$ N.
x8 `9 Q* B, d" n7 H; O' ^, o! fThe main frequency bands of RFID are: 125kHz, 134.2khz, 13.56MHz, 860-960mhz, 2.45GHz and 5.8GHz,The low frequency (LF.
125kHz, 134.2khz) RFID system is mainly used for animal identification, factory data acquisition, etc.; the high frequency (HF, 13.56MHz) RFID system technology has been relatively mature, and is widely used in access control, intelligent transportation, etc.; LF and HF frequency band use inductive coupling mode to work, and the general working distance is small; UHF (UHF, 134.2khz) RFID system technology has been relatively mature, The effective working distance of RFID system tag can reach 3-6 meters, which is suitable for logistics, supply chain and other fields.
microwave band (2.45GHz and 5.8GHz) is used for container management and road toll collection.
UHF and microwave band work in electromagnetic coupling mode, with a long working distance.
: G "t! H. U5 F. R& I) C9 @3 ^4 tNFC:" o: Z( f( N( v( O.
C5 e% c+ q$ _ 3 v; \3 e- Y2 z' ZNFC is short for near field communication, NFC, which is jointly developed by Philips and Sony, is a non-contact identification and interconnection technology.
it can conduct short-range wireless communication between mobile devices, consumer electronics, PCs and intelligent control tools.
NFC provides a simple, touch solution.
it can let consumers exchange information and access content simply and intuitively At present, NFC forum has more than 70 members around the world, including MasterCard International, Panasonic Electronics Industry Co., Ltd., Microsoft, Motorola, NEC, Renesas technologies, Samsung, Texas Instruments Manufacturing and visaNFC is developed on the basis of RFID.
in essence, NFC is not very different from RFID, and both are based on the signal transmission between two objects with similar geographical location.
NFC is based on the signal transmission between two objects with similar geographical location6 I( S2 b' P. @* V# |2 S9 e.
a' e& \8 n1 ^0 J' QISO/IEC 15963( {4 ?/ C4 W: h2 h( u- o3 v" V% h6 C5 QIso15693 is an international standard for RFID applications. The standard defines the air interface and data communication specifications of smart tags and readers working at 13.56MHz. The farthest reading distance of tags that meet this standard is 2m.
the minimum value of workplace is 0.15a/m.
the maximum value is 5A / m. the encoding mode from reader to tag adopts pulse position modulation, Two coding modes are supported, namely 256 select 1 mode and 4 select 1 mode.
when 256 select 1 mode, the communication rate is 1.54KBIT/S.
when 4 select 1 mode, the communication rate is 26.48kbits/s. the data coding from tag to reader adopts Manchester coding mode. According to the different signal debugging modes, the communication rate is also different. As shown in the table below, the tag supports two communication speeds: high speed and low speed.% @7 x& I- U2 _ : u* B, S: f6 r2 P3 n* T8 J4 {4 f6 _ Application of ISO / IEC 15963 & a # m # P # Q 'x; q) y' y* Z* g* ?" F3 ]. z/ C/ ?( z3 O1) Personnel access 9 t) s * O. y6 c * r "B3 t& u  }3 k; y9 G+ R9 w,~Personnel channel is the most representative product of iso15693 standard, which generally supports one-dimensional or two-dimensional label recognition, and the reading and writing distance of typical labels is more than 120cm. At present, it is widely used in personal identification, conference attendance, library management, access control, item tracking, anti-counterfeiting, warehousing and logistics, etc.
in this paper, the characteristics of personnel channel are analyzed  M" a- U' B& _ + T9 m' O4 h! M # n; c) d (I.
d "C $Z3 I2) omnidirectional channel* e3 m' [7 d# a' f  J6 m4 J0 m *} #] / V "U8 o: X & G 'm6h1 I" supports three-dimensional reading of tags, channel spacing can reach more than 90cm, supports EAS and AFI detection modes, supports offline application and parallel use of multiple antennas, and can automatically count and display the number of people entering and leaving.
it is mainly used in the fields of Library anti-theft, identity recognition, conference check-in, access control, item tracking, etc?1 ~.
e' K8 Y9 z! }7 J% U0 t3) Smart bookshelf - V6 U.} # O2 V $Q1 G* j3 `+ P, \1 S& |) \+ @3 L1 c$ oThe intelligent bookshelf is a set of high-performance real-time management system for books on shelves, which uses RFID technology to realize the identification of single grade items of books on shelves, and can complete the functions of collection monitoring, inventory, book query and positioning, wrong shelf statistics, etc.
the intelligent bookshelf system has the characteristics of fast detection speed, accurate positioning, etc.
it can be applied to the fields of books, archives, document management, etc.
the intelligent bookshelf system has the advantages of high detection speed, accurate positioning, etc  [5 @& R. t- F: D0 R# O( f# ~8 _ ; q7 vISO/IEC144434 U! q7 h4 s. R; C0 C( r. w9 ?: O) M: _ * vIso14443 is an international RFID standard for RFID application, which is suitable for near-field communication.
the maximum reading distance supported by iso14443 is 10cm. Iso14443 defines the air interface and data communication specification of smart tag working at 13.56MHz.
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z0n. Q & M% Q6~3Z: R $C, B! H4g ﹣ iso14443 specifies two data transmission modes between reader and near coupled IC card: type A and type B, i.e. type A and type B. the minimum data communication rate supported by the standard is 106kbps, and the maximum can support 848kbps& C2 i, U2 N# j' P0 ?$R (Q0 C "F1 c'i / V & T) a type A is first developed and used by Philips (NXP) and other semiconductor companies. It is the most widely used protocol standard in the world. Ask 100% am debugging mode is adopted from PCD to PICC, and ook subcarrier debugging mode is adopted from PICC to PCD.
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~ 2 V9 J: J. T, K: J) B $Y-H type B is an open contactless smart card standard,Ask 10% am debugging mode is adopted from PCD to PICC, and BPSK subcarrier debugging mode is adopted from PICC to PCD.
in this paper, the method of ask 10% am debugging is adopted from PCD to PICC, and BPSK subcarrier debugging is adopted from PICC to PCD+ I7 P5 F: K  }  L6 G9 \( x$ H. c1 U% ^7 Q4 V.
a9 eApplication of iso144432 N& L/ @1 h. s5 j. I! Z. l; l: M2 G 'a "G6 N2 f * [. L] iso14443 standard is mainly used in the field of personnel management and close security identification of micro payment.
the main application fields include all-in-one card, member management, personnel attendance, shopping card, identity recognition, electronic documents, etc.
/ s \ & y. H5 F + F L. o * r) J4 Q5 _ #Z & H0 L + V m24lr suite is the IC version of EEPROM based on m24lr04e-r.
it has dual interfaces and can be used in a wide range of applications, such as industrial or medical equipment and consumer electronics products, including two development boards with different functions.
/ M% ~ 6 a "Z5 h \ / b"E & F & B7 W8 o * g. n" features:5 L: m( E% w/ e9 n" i5 k; X- LThe m24lr development board includes m24lr04 eeeprom I2C chip.
it also includes rmn6t / 2 dual interface and RF interface conforming to ISO / IEC15693 standard,It includes 8 KB stts7510wb3f flash memory, low voltage digital temperature sensor, 20x40 mm induction antenna, and two function buttons (use key and reset key respectively) welded on PCB.
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P, ` 9 g't - G + Z, T3 Z: N8 e, t, Q) k- @" o. f0 I2 {  z2) RF receiving board cr95hf-vmd5t includes a 13.56 MHz multi protocol contactless transceiver IC, 32-bit microcontroller SPI and UART serial data interface connected with stm32f103cb, 128 byte flash memory, 47x 34mm 13.56 MHz induction antenna, and USB port of related circuits, which can communicate with PC host and supply power for development board.
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