CN108108774A - A kind of metal electronic label recognition method based on ultra-high frequency RFID technology - Google Patents
A kind of metal electronic label recognition method based on ultra-high frequency RFID technology Download PDFInfo
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- CN108108774A CN108108774A CN201711071288.1A CN201711071288A CN108108774A CN 108108774 A CN108108774 A CN 108108774A CN 201711071288 A CN201711071288 A CN 201711071288A CN 108108774 A CN108108774 A CN 108108774A
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- Prior art keywords
- metal
- inductance
- frequency rfid
- metal object
- transmission line
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07758—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for adhering the record carrier to further objects or living beings, functioning as an identification tag
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07771—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card the record carrier comprising means for minimising adverse effects on the data communication capability of the record carrier, e.g. minimising Eddy currents induced in a proximate metal or otherwise electromagnetically interfering object
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07786—Antenna details the antenna being of the HF type, such as a dipole
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention relates to a kind of metal electronic label recognition methods based on ultra-high frequency RFID technology, belong to electronic label identification technical field；The radio-frequency power of reader is entered metal object by it by transmission line structure, the two poles of the earth in the transmission line structure contact directly the both ends of metal object respectively, the transmission line structure and metal object form a conductor circuit, and conduction electric current can be generated on metal object.Inductance adds the combining structure of ultrahigh frequency RFID chip.The design object of inductance is that the characteristic input capacitive reactance for the induction reactance and ultrahigh frequency RFID chip that it is made to be showed on metal is cancelled out each other, so as to reach best matching effect；The accuracy of identification is high, avoids and misreads and the problem of skip, and the thickness of electronic tag designs relatively thin, small volume, at low cost, can meet the design requirement of hyundai electronics label.
Description
Technical field
The present invention relates to a kind of metal electronic label recognition methods based on ultra-high frequency RFID technology, belong to electronics mark
Sign identification technology field.
Background technology
RFID (radio frequency identifications：Radio frequency identification) it is a kind of contactless automatic identification
Technology, it is by radiofrequency signal automatic identification target object and obtains related data, and identification work is without manual intervention, as item
The wireless version of shape code；It is a kind of communication technology, can identifies specific objective by radio signals and read and write related data, and nothing
It needs to establish mechanical or optical contact between identifying system and specific objective.
Super high frequency radio frequency identifies（RFID）The fundamental mode of technology is identification equipment（Commonly referred to as reader）Pass through
Ultra-high frequency antenna gives off electromagnetic field；Electronic tag is fixed above identified article, label is made of label antenna and chip,
Label antenna is entered in the external electromagnetic field that reader gives off, and is therefrom obtained energy and come for chip power supply, then chip
Interior data is modulated on electromagnetic wave and is reflected back again by label antenna, receives and identifies for reader.Entirely identified
Cheng Zhong, identification equipment are not contacted with identified article, this is the essential characteristic of current all super high frequency radio frequency identification technologies.Cause
This radio frequency identification is often referred to as " contactless identification ".
The ultrahigh frequency RFID electronic tag of metal, there are two types of design methods at present:
Standing wave caused by a kind of method is conceived to reduction metal surface reflection electromagnetic wave offsets characteristic.In designing therefore, by label
Antenna separates with metal or further separates label antenna and metal using the material of high-k, to increase
Add the equivalent electrical length at interval.
Another method is the part as label antenna directly using identified metal.RFID label antenna and
Chip circuit, it is whole as one in electromagnetic property with identified metal by the method that conductor contact or close coupling are closed
Body.Then metal obtains energy of electromagnetic field as chip power supply as antenna from space.
Using first way design metal ultrahigh frequency RFID electronic tag, universal thickness is thicker, volume compared with
Greatly, cost is higher；And the electronic tag of second way design is used since the antenna structure actually to work is identified
Metal, so the variation of metal size, contacting with each other before metal, the influence of canister or frame
The performance of antenna will be significantly affected.This will result in electronic tag misread or skip.
In actual application, label number that many actual applications pair identify simultaneously is but right without too high requirement
The accuracy of identification is very sensitive.Electronic tag misread or skip be all definitely it is flagrant.It is many simultaneously to apply also not
Allow using the electronic tag that volume is larger or cost is higher；Therefore the RFID electronic label design of existing two kinds of metals
Technology can not meet the actual demand of these applications.
The content of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of simple in structure, design rationally, make
With the convenient and high metal electronic label recognition method based on ultra-high frequency RFID technology of stability.
To achieve the above object, the technical solution adopted by the present invention is：The radio-frequency power of reader is passed through transmission line by it
Structure enters metal object, and the two poles of the earth in the transmission line structure contact directly the both ends of metal object, the transmission line respectively
Structure and metal object form a conductor circuit, and conduction electric current can be generated on metal object；
Conduction electric current on the metal object generates induced field around metal；Inductance is placed in metal table
Face, and make the magnetic line of force direction of inductance consistent with the magnetic line of force direction that conduction electric current generates；So when power transformation of reader output
Stream generates time-varying magnetic field around metal, and time-varying magnetic field generates sensing electric current, sensing on the inductance coil that it is passed through again
Electric current is the ultrahigh frequency RFID chip power supply at connection inductance both ends.
Preferably, being equipped with matched load in the conductor circuit, the matched load is arranged on transmission line and metal object
Between body, so as to reduce the reflection of reader radio frequency power output.
Preferably, the base material can be high dielectric constant material to reduce label volume, or ferrite material
Expect to improve inductance inductance value.
The design principle of the present invention：Inductance adds the combining structure of ultrahigh frequency RFID chip.The design object of inductance is order
Its induction reactance showed on metal and the characteristic input capacitive reactance of ultrahigh frequency RFID chip are cancelled out each other, best so as to reach
Matching effect.
With the above structure, the present invention has the beneficial effect that：It is of the present invention a kind of based on ultra-high frequency RFID technology
Metal electronic label recognition method, the accuracy of identification is high, avoids and misreads and the problem of skip, and the thickness of electronic tag
Degree designs relatively thin, small volume, at low cost, can meet the design requirement of hyundai electronics label, the present invention have it is simple in structure,
It is reasonable to set, the advantages that having a wide range of application.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the connection diagram between the reader and metal object of the present invention；
Fig. 2 is metal object inner working schematic diagram in the present invention；
Reference sign：
Reader 1, transmission line structure 2, metal object 3, conduction electric current 4, magnetic line of force direction 5, inductance 6, metal 7, superelevation
Frequency RFID chip 8, base material 9, matched load 10.
Specific embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Referring to as depicted in figs. 1 and 2, present embodiment by the radio-frequency power of reader 1 by transmission line structure 2 into
Enter metal object 3, the two poles of the earth in the transmission line structure 2 contact directly the both ends of metal object 3, the transmission line structure respectively
2 and metal object 3 form a conductor circuit, conduction electric current 4 can be generated on metal object 3；In the conductor circuit be equipped with
With load 10, the matched load 10 is arranged between transmission line structure 2 and metal object 3, defeated so as to reduce reader radio frequency
Go out the reflection of power.
According to Ampere's law in specific embodiment, the conduction electric current 4 on the metal object 3 can be 7 weeks in metal
Enclose generation induced field；Inductance 6 is placed in 7 surface of metal, and generates the magnetic line of force direction 5 of inductance 6 and conduction electric current
Magnetic line of force direction it is consistent；The changing currents with time that reader 1 exports generates time-varying magnetic field around metal 7, and time-varying magnetic field is again
Sensing electric current is generated on the inductance coil that it is passed through, sensing electric current is powered for the ultrahigh frequency RFID chip 8 at connection inductance both ends；
The ultrahigh frequency RFID chip 8 is arranged on base material 9；The base material 9 can be high dielectric constant material to reduce label volume,
Or Ferrite Material is to improve inductance inductance value.
Present embodiment adds the combining structure of ultrahigh frequency RFID chip using inductance, and the design object of inductance is order
Its induction reactance showed on metal and the characteristic input capacitive reactance of ultrahigh frequency RFID chip are cancelled out each other, best so as to reach
Matching effect.
Embodiment：
Using the ultrahigh frequency radio frequency identification (RFID) reader of ISO18000-6C, parallel wire structure is connected；And make the end contact of a line golden
Belong to one end of item, the end of another line touches the other end of metal strip by 50 Ohmic resistances.Actual measurement read-write at this time
The reflectance factor of device output port is -15dB；Then the inductance of 30nH is designed（173 ohm of induction reactance is presented）, and by NXP companies
UCODE G2XM chips（171 ohm of input capacitive reactance is presented）It is encapsulated in inductance both ends.Make packaged inductive type electronic tag
Bar surface is attached to, and makes the magnetic line of force direction of inductance vertical with metal strip direction.Measurement finds that reading effect is fabulous, read-write
With regard to the ultrahigh frequency RFID electronic tag of the metal can be read when the output power of device is 10mW.
One kind described in present embodiment is based on ultrahigh frequency RFID；The metal electronic label identification side of technology
Method, the accuracy of identification is high, avoids and misreads and the problem of skip, and the thickness of electronic tag designs relatively thin, small volume, into
This is low, and the design requirement that can meet hyundai electronics label has a wide range of application.
The above is merely illustrative of the technical solution of the present invention and unrestricted, and those of ordinary skill in the art are to this hair
The other modifications or equivalent substitution that bright technical solution is made, without departing from the spirit and scope of technical solution of the present invention,
It should be covered by the scope of the claims of the present invention.
Claims (4)
1. a kind of metal electronic label recognition method based on ultra-high frequency RFID technology, it is characterised in that：It is by reader
(1) for radio-frequency power by transmission line structure (2) into metal object (3), the two poles of the earth difference in the transmission line structure (2) is straight
The both ends of contacting metal object (3) are connect, the transmission line structure (2) and metal object (3) form a conductor circuit, metal object
Conduction electric current (4) can be generated on body (3)；
Conduction electric current (4) on the metal object (3) generates induced field around metal (7)；Inductance (6) is placed in
Metal (7) surface, and make the magnetic line of force direction (5) of inductance (6) consistent with the magnetic line of force direction that conduction electric current generates；Read-write
The changing currents with time of device (1) output generates time-varying magnetic field around metal (7), and time-varying magnetic field is again in the inductance coil that it is passed through
Upper to generate sensing electric current, sensing electric current is ultrahigh frequency RFID chip (8) power supply at connection inductance both ends；The ultrahigh frequency RFID core
Piece (8) is arranged on base material (9).
2. a kind of metal electronic label recognition method based on ultra-high frequency RFID technology according to claim 1,
It is characterized in that：In the conductor circuit be equipped with matched load (10), the matched load (10) be arranged on transmission line structure (2) with
Between metal object (3), so as to reduce the reflection of reader radio frequency power output.
3. a kind of metal electronic label recognition method based on ultra-high frequency RFID technology according to claim 1,
It is characterized in that：The base material (9) can be high dielectric constant material to reduce label volume, or Ferrite Material is to carry
High inductance inductance value.
4. a kind of metal electronic label recognition method based on ultra-high frequency RFID technology according to claim 1,
It is characterized in that：It adds the combining structure of ultrahigh frequency RFID chip using inductance, and the design object of inductance is to make it in metal object
The induction reactance showed on product and the characteristic input capacitive reactance of ultrahigh frequency RFID chip are cancelled out each other, so as to reach best matching effect
Fruit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071288.1A CN108108774B (en) | 2017-11-03 | 2017-11-03 | Metal article electronic tag identification method based on ultrahigh frequency RFID technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071288.1A CN108108774B (en) | 2017-11-03 | 2017-11-03 | Metal article electronic tag identification method based on ultrahigh frequency RFID technology |
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| Publication Number | Publication Date |
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| CN108108774A true CN108108774A (en) | 2018-06-01 |
| CN108108774B CN108108774B (en) | 2023-05-23 |
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| CN201711071288.1A Active CN108108774B (en) | 2017-11-03 | 2017-11-03 | Metal article electronic tag identification method based on ultrahigh frequency RFID technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114254663A (en) * | 2020-09-22 | 2022-03-29 | 上海宝信软件股份有限公司 | Method, system and medium for preventing misreading of RFID (radio frequency identification) electronic tags on multiple adjacent objects |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114254663A (en) * | 2020-09-22 | 2022-03-29 | 上海宝信软件股份有限公司 | Method, system and medium for preventing misreading of RFID (radio frequency identification) electronic tags on multiple adjacent objects |
| CN114254663B (en) * | 2020-09-22 | 2024-04-02 | 上海宝信软件股份有限公司 | Method, system and medium for preventing misreading of RFID electronic tags on multiple adjacent objects |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108108774B (en) | 2023-05-23 |
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