CN106295446A - The multiple antennas with accurate positioning function activates source - Google Patents
The multiple antennas with accurate positioning function activates source Download PDFInfo
- Publication number
- CN106295446A CN106295446A CN201610643217.3A CN201610643217A CN106295446A CN 106295446 A CN106295446 A CN 106295446A CN 201610643217 A CN201610643217 A CN 201610643217A CN 106295446 A CN106295446 A CN 106295446A
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- Prior art keywords
- antenna
- circuit
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10356—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10198—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes
- G06K7/10217—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves setting parameters for the interrogator, e.g. programming parameters and operating modes parameter settings controlling the transmission power of the interrogator
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Selective Calling Equipment (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Mobile Radio Communication Systems (AREA)
- Near-Field Transmission Systems (AREA)
- Lock And Its Accessories (AREA)
Abstract
The present invention discloses a kind of multiple antennas with accurate positioning function and activates source, and its power MOS pipe drives module that low frequency activation signal carries out power amplification and generates low frequency radio frequency signal；Power control circuit between low frequency radio frequency circuit and governor circuit, this power control circuit is used for regulating low-frequency antenna and launches power；First toggle switch, this the first toggle switch one end is connected to described governor circuit, the other end is connected to for arranging the second toggle switch of mode of operation, RS485 communicating circuit and high frequency wireless module, and described mode of operation includes transmitting power, the operating time of each antenna of effective number of antennas, the order of work of each antenna, each antenna；Described second toggle switch, RS485 communicating circuit and high frequency wireless module each other end are all connected to described governor circuit.Power consumption of the present invention is lower, wakes up up in the range of distance can be accurately controlled in 0.5 ~ 7 meter, and data communication is apart from unaffected.
Description
Technical field
The present invention relates to radio frequency identification field, particularly relate to a kind of multiple antennas with accurate positioning function and activate
Source.
Background technology
In recent years, Internet of Things is a new technique of people's common concern, and REID is as one of Internet of Things
Key technology has obtained rapid development.The management of the complex environments such as community, mining area, highway is constantly subjected to national departments concerned
Pay much attention to, but the dispute caused due to negligent supervision even accident still occurs repeatedly, and causes the most individual and national
The unnecessary loss of interests.How Strengthening managing measure, the most accurate, real-time, fast grasp residential quarter Nei Feiben is little
The Efficient Operation of district's personnel state, mining area personnel distribution and mobility status, highway toll efficiency and burst accident rescue is state
The problem that relevant department of family is in the urgent need to address.Change the management mode fallen behind, it is achieved the modernization of management, informationization are from root
The important channel of these problems is solved in basis.
At present, the low frequency activation source used in practice is all single antenna, activates the transmitting range in source generally on 5 meters of left sides
The right side, range of signal is less, easily activates less than label, and low-frequency antenna has certain directivity, the low frequency that it is launched
Signal field is not circular but ellipse, and the signal intensity which results in label in different directions is inconsistent, even
There is no signal, cannot be accurately positioned the most yet, bring a lot of inconvenience and trouble to management.Meanwhile, the most just due to existing low frequency
Activation source is single antenna, people must arrange more equipment to cover identical region, and installation when
It has to be ensured that their signal can not have intersection, otherwise will interfere and produce signal blind zone, so, both increase
Equipment cost, too increases difficulty of construction, and after coming out in multiple antennas low frequency activation source, competitiveness just shows the lowest
Under.
Summary of the invention
The present invention provides a kind of multiple antennas with accurate positioning function to activate source, and this radio-frequency recognition system increases low frequency
The coverage of signal, improves the stability of low frequency signal, solves the interference problem between each antenna, it is possible to achieve accurately fixed
Position, identification read same electronics apart from signal cover card reader little, multiple adjustable, that solution single antenna activates source simultaneously
Label and the puzzlement of instability, and reduce power consumption, extend the service life of battery, can long trouble free running.
For reaching above-mentioned purpose, the technical solution used in the present invention is: a kind of multiple antennas with accurate positioning function swashs
Work-source, including: memorizer, it is used for depositing each low-frequency antenna ID coding and antenna activation source ID coding；
The low-frequency antenna that low frequency radio frequency circuit is connected with low frequency radio frequency circuit with several, described low frequency radio frequency circuit includes series connection
Drive module with door and power MOS pipe, described with door for will be from the data signal modulation of governor circuit to 125KHz load
Ripple signal forms low frequency activation signal, and it is low that described power MOS pipe drives module that low frequency activation signal carries out power amplification generation
Frequently radiofrequency signal；
Power control circuit between low frequency radio frequency circuit and governor circuit, this power control circuit is used for regulating low-frequency antenna
Launch power；
First toggle switch, this first toggle switch one end is connected to described governor circuit, and the other end is connected to for arranging work
Second toggle switch of operation mode, RS485 communicating circuit and high frequency wireless module, described mode of operation includes effective antenna number
Mesh, the order of work of each antenna, transmitting power, the operating time of each antenna of each antenna；Described second toggle switch,
RS485 communicating circuit and high frequency wireless module each other end are all connected to described governor circuit, and described RS485 communicating circuit leads to
The come over signal of automatic network realizes configuration to governor circuit mode of operation, described high frequency wireless module by come wireless realize right
The configuration of governor circuit mode of operation；
Governor circuit, compiles low-frequency antenna ID coding, the antenna activation source ID from memorizer according to set mode of operation
Code contains low-frequency antenna ID coding by low frequency radio frequency circuit evolving, antenna activation source ID encodes and the low frequency of operating mode information
Activation signal；
Described antenna activation source also includes a signal lamp being connected to described governor circuit, and it is used for showing antenna activation source
Duty；
Described antenna activation source also includes a power-switching circuit, for providing electric energy to antenna activation source.
The technical scheme that technique scheme is improved further is as follows:
1., in such scheme, described antenna activation source also includes a signal lamp being connected to described governor circuit, and it is used for
The duty in display antenna activation source.
2. in such scheme, described antenna activation source also includes a power-switching circuit, for providing to antenna activation source
Electric energy.
3., in such scheme, the frequency of described low frequency signal is 125KHz.
4., in such scheme, the frequency of described high frequency carrier is 2.45GHz.
Owing to technique scheme is used, the present invention compared with prior art has the advantage that
1, the present invention has the multiple antennas activation source of accurate positioning function, which increases the coverage of low frequency signal, improves low
Frequently the stability of signal, solves the interference problem between each antenna, it is possible to achieve is accurately positioned, identifies apart from adjustable, solution
The signal cover card reader little, multiple in single antenna activation source reads the puzzlement of same electronic tag and instability simultaneously,
And reduce power consumption, and extend the service life of battery, can long trouble free running.
2, the present invention has the multiple antennas activation source of accurate positioning function, and it is owing to have employed multiple antennas circuit design, letter
Number coverage is relatively wider, signal stabilization is high, and operating frequency is 125KHz, it is achieved being easier, circuit is simple, cost
Cheap, it is simple to popularization and application；It uses various ways to regulate transmitting power, makes installation more flexible, more convenient.
3, the present invention has the multiple antennas of accurate positioning function and activates source, its by low frequency and high-frequency circuit, wire communication with
Just right the merging of wireless communication line so that service behaviour is more reliable, uses more convenient, and user is more easily accepted by making
With.
4, the present invention has the multiple antennas activation source of accurate positioning function, and it uses the mode launching power adjustable to design,
Make its signal cover adjustable, it is possible to adapt to more different applied environment.
5, the present invention has the multiple antennas activation source of accurate positioning function, and just right to low frequency and high-frequency circuit is melted by it
It is combined in a tag system so that power consumption is lower, wakes up up in the range of distance can be accurately controlled in 0.5 ~ 7 meter, and data are led to
News are apart from unaffected.
6, the present invention has the multiple antennas activation source of accurate positioning function, and its applicating software programming uses unique mode,
Making to use extremely simple, user, only with carrying, enters when waking up region up, and system will automatically process relevant information.
Accompanying drawing explanation
Accompanying drawing 1(a) it is that multiple antennas of the present invention activates source structure schematic diagram；
Accompanying drawing 1(b) be accompanying drawing 1(a) partial structurtes schematic diagram；
Accompanying drawing 2 is low frequency radio frequency circuit of the present invention and low frequency antenna circuit schematic diagram；
Accompanying drawing 3 is power control circuit electrical schematics in radio-frequency recognition system of the present invention；
Accompanying drawing 4 is antenna activation source main program flow chart in radio-frequency recognition system of the present invention；
Accompanying drawing 5 is that in radio-frequency recognition system of the present invention, antenna activation source controls subroutine flow chart；
Accompanying drawing 6 is radio-frequency recognition system medium-high frequency wireless data communication subroutine flow chart of the present invention；
Accompanying drawing 7 is RS485 communicating circuit subroutine flow chart in radio-frequency recognition system of the present invention.
In the figures above: 1, signal lamp；2, power-switching circuit；3, high frequency wireless module；4, memorizer；5, low frequency
Radio circuit；51 and door；52, power MOS pipe drives module；6, low-frequency antenna；7, governor circuit；8, power control circuit；9、
First toggle switch；10, the second toggle switch；11, RS485 communicating circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment the invention will be further described:
Embodiment: a kind of multiple antennas with accurate positioning function activates source, including: memorizer 4, it is used for depositing each low frequency sky
Line ID coding and antenna activation source ID coding；
The low-frequency antenna 6 that low frequency radio frequency circuit 5 is connected with low frequency radio frequency circuit 5 with several, described low frequency radio frequency circuit 5 includes
That connects drives module 52, described and door 51 to be used for the data signal modulation from governor circuit with door 51 and power MOS pipe
Forming low frequency activation signal to 125KHz carrier signal, described power MOS pipe drives module 52 that low frequency activation signal is carried out merit
Rate amplifies generation low frequency radio frequency signal；
Power control circuit 8 between low frequency radio frequency circuit 5 and governor circuit 7, this power control circuit 8 is used for regulating low frequency
Power launched by antenna 6；
First toggle switch 9, this first toggle switch 9 one end is connected to described governor circuit 7, and the other end is connected to for arranging
Second toggle switch 10, RS485 communicating circuit 11 and the high frequency wireless module 3 of mode of operation, described mode of operation includes effectively
Number of antennas, the order of work of each antenna, each antenna launch power, the operating time of each antenna；Described second
Toggle switch 10, RS485 communicating circuit 11 and the respective other end of high frequency wireless module 3 are all connected to described governor circuit 7, described
RS485 communicating circuit 11 realizes configuration to governor circuit 7 mode of operation by carrying out the signal of automatic network, described high frequency is wireless mould
Block 3 is by carrying out the wireless realization configuration to governor circuit 7 mode of operation；
Governor circuit 7, according to set mode of operation by from memorizer 4 low-frequency antenna ID encode, antenna activation source ID
Encode and generated containing low-frequency antenna ID coding, antenna activation source ID coding and operating mode information by low frequency radio frequency circuit 5
Low frequency activation signal；
Described antenna activation source also includes a power-switching circuit 2, for providing electric energy to antenna activation source 1.
Above-mentioned antenna activation source 1 also includes a signal lamp 1 being connected to described governor circuit 7, and it is used for showing sky
Line activates the duty in source 1.
Above-mentioned antenna activation source also includes a power-switching circuit 2, for providing electric energy to antenna activation source 1.
The frequency of above-mentioned low frequency signal is 125KHz, and the frequency of above-mentioned high frequency carrier is 2.45GHz.
Described high frequency antenna is located on circuit board, and data during communication include that the numbering of low frequency signal source, low frequency are believed
Number intensity, self No. ID, battery level information.Described low-frequency antenna can be with one-dimensional antenna, it is also possible to be 3D antenna, one-dimensional sky
Line has directional effect, and 3D antenna is not limited by direction.Described signal lamp is light emitting diode.Described system power supply battery
Form is soft package lithium battery.Described battery electricity detection method is electric resistance partial pressure detection.
The distance between this dual-frequency label and low frequency signal source just can be judged accurately according to low frequency signal intensity value, from
And the communication distance of low frequency part can be controlled accurately between 0.5 ~ 7 meter, indirectly also correspond to control HFS
Communication distance.
Dispatching from the factory after tested in multiple antennas low frequency activation source, after installing and setting mode of operation, begins to setting
Mode of operation is ceaselessly to emission low frequency activation signal, and this low frequency activation signal packet contains ID coding and the equipment of each antenna
ID coding.When the carrier carrying double-frequency electronic label enters or passes into signal coverage areas, this signal will be received,
Then some information adding label self after signal resolution are sent to card reader with high frequency regimes by label.This information is wrapped
Containing following content: multiple antennas activates the ID of each antenna in the ID in source, activation source, signal intensity when receiving signal, mark
The electricity signed, No. ID of label, other information (temperature, humidity, pressure, gravity, speed etc.) etc..Card reader is again in these information
In plus oneself ID, then final information is uploaded to upper level management module.Management module may have various ways, than
As: can be 1, the on-the-spot application apparatus such as a controller, this equipment will carry out information processing at the scene and make corresponding management
Action, to service for people.2, can be Remote management center run user application software, this software to these information at
After reason, or achieve or point out or other equipment offer data etc. are provided, instructing relevant work personnel further to be worked.
Above-described embodiment, only for technology design and the feature of the explanation present invention, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implements according to this, can not limit the scope of the invention with this.All according to the present invention
The equivalence that spirit is made changes or modifies, and all should contain within protection scope of the present invention.
Claims (2)
1. a multiple antennas with accurate positioning function activates source, it is characterised in that: including: memorizer (4), be used for depositing often
Individual low-frequency antenna ID coding and antenna activation source ID coding；
The low-frequency antenna (6) that low frequency radio frequency circuit (5) is connected with low frequency radio frequency circuit (5) with several, described low frequency radio frequency electricity
Road (5) includes that connects drives module (52) with door (51) and power MOS pipe, and described and door (51) is used for will be from governor circuit
Data signal modulation to 125KHz carrier signal formed low frequency activation signal, described power MOS pipe drive module (52) by low
Frequently activation signal carries out power amplification generation low frequency radio frequency signal；
Being positioned at power control circuit (8) between low frequency radio frequency circuit (5) and governor circuit (7), this power control circuit (8) is used for
Power is launched in regulation low-frequency antenna (6)；
First toggle switch (9), this first toggle switch (9) one end is connected to described governor circuit (7), and the other end is connected to use
In arranging second toggle switch (10) of mode of operation, RS485 communicating circuit (11) and high frequency wireless module (3), described work
When pattern includes the work launching power, each antenna of effective number of antennas, the order of work of each antenna, each antenna
Long；Described second toggle switch (10), RS485 communicating circuit (11) and high frequency wireless module (3) each other end is all connected to
Described governor circuit (7), described RS485 communicating circuit (11) realizes working governor circuit (7) by carrying out the signal of automatic network
The configuration of pattern, described high frequency wireless module (3) is by carrying out the wireless realization configuration to governor circuit (7) mode of operation；
Governor circuit (7), will be from the low-frequency antenna ID coding of memorizer (4), antenna activation according to set mode of operation
ID coding in source is generated by low frequency radio frequency circuit (5) and encodes and mode of operation containing low-frequency antenna ID coding, antenna activation source ID
The low frequency activation signal of information；
Described antenna activation source also includes a power-switching circuit (2), for providing electric energy to antenna activation source (1).
Multiple antennas the most according to claim 1 activates source, it is characterised in that: described antenna activation source (1) also includes one even
Receive the signal lamp (1) of described governor circuit (7), its duty being used for showing antenna activation source (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643217.3A CN106295446B (en) | 2013-11-27 | 2013-11-27 | Multiple antennas activate source with accurate positioning function |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612973.6A CN103646228B (en) | 2013-11-27 | 2013-11-27 | Multiple Antenna Activation Sources for RFID |
| CN201610643217.3A CN106295446B (en) | 2013-11-27 | 2013-11-27 | Multiple antennas activate source with accurate positioning function |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310612973.6A Division CN103646228B (en) | 2013-11-27 | 2013-11-27 | Multiple Antenna Activation Sources for RFID |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106295446A true CN106295446A (en) | 2017-01-04 |
| CN106295446B CN106295446B (en) | 2019-06-18 |
Family
ID=50251440
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610641593.9A Expired - Fee Related CN106446734B (en) | 2013-11-27 | 2013-11-27 | Radio-frequency antenna activate source for Internet of Things |
| CN201310612973.6A Expired - Fee Related CN103646228B (en) | 2013-11-27 | 2013-11-27 | Multiple Antenna Activation Sources for RFID |
| CN201610642973.4A Expired - Fee Related CN106295444B (en) | 2013-11-27 | 2013-11-27 | Low-power anti-interference antenna activation source |
| CN201610643217.3A Expired - Fee Related CN106295446B (en) | 2013-11-27 | 2013-11-27 | Multiple antennas activate source with accurate positioning function |
| CN201610642975.3A Expired - Fee Related CN106295445B (en) | 2013-11-27 | 2013-11-27 | Radio frequency antenna activation source with dynamically adjustable identification distance |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610641593.9A Expired - Fee Related CN106446734B (en) | 2013-11-27 | 2013-11-27 | Radio-frequency antenna activate source for Internet of Things |
| CN201310612973.6A Expired - Fee Related CN103646228B (en) | 2013-11-27 | 2013-11-27 | Multiple Antenna Activation Sources for RFID |
| CN201610642973.4A Expired - Fee Related CN106295444B (en) | 2013-11-27 | 2013-11-27 | Low-power anti-interference antenna activation source |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610642975.3A Expired - Fee Related CN106295445B (en) | 2013-11-27 | 2013-11-27 | Radio frequency antenna activation source with dynamically adjustable identification distance |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN106446734B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106682559B (en) * | 2017-03-02 | 2023-08-08 | 苏州摩比信通智能系统有限公司 | Radio frequency identification reading terminal and radio frequency identification reading success prompting method |
| CN117560033A (en) * | 2022-03-25 | 2024-02-13 | 南京科源迪讯科技有限公司 | A low-frequency signal transceiver circuit and related devices |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110039601A1 (en) * | 2008-04-18 | 2011-02-17 | Shanghai Quanray Electronics Co., Ltd | signal enhancer chip for radio frequency identification system and a signal enhancer |
| CN202887237U (en) * | 2012-08-27 | 2013-04-17 | 江苏优因特智能科技有限公司 | Radio-frequency-signal controllable activation indicating device |
| CN103164730A (en) * | 2011-12-09 | 2013-06-19 | 苏州木兰电子科技有限公司 | Dual-frequency radio frequency electronic tag |
| CN103218594A (en) * | 2012-11-07 | 2013-07-24 | 无锡成电科大科技发展有限公司 | Radio frequency identification terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090117938A1 (en) * | 2007-11-02 | 2009-05-07 | Broadcom Corporation | Ic for a high frequency communication device with minimal off chip components |
| JP5146664B2 (en) * | 2008-05-27 | 2013-02-20 | ブラザー工業株式会社 | Wireless tag communication device |
| CN102236805A (en) * | 2010-05-06 | 2011-11-09 | 周林生 | Safety identification system based on technology of Internet of things |
| CN202979050U (en) * | 2012-11-26 | 2013-06-05 | 广东步步高电子工业有限公司 | A radio frequency system for a dual-antenna mobile terminal |
| CN203689531U (en) * | 2013-11-27 | 2014-07-02 | 苏州木兰电子科技有限公司 | Multi-antenna activation source used for radio frequency identification |
-
2013
- 2013-11-27 CN CN201610641593.9A patent/CN106446734B/en not_active Expired - Fee Related
- 2013-11-27 CN CN201310612973.6A patent/CN103646228B/en not_active Expired - Fee Related
- 2013-11-27 CN CN201610642973.4A patent/CN106295444B/en not_active Expired - Fee Related
- 2013-11-27 CN CN201610643217.3A patent/CN106295446B/en not_active Expired - Fee Related
- 2013-11-27 CN CN201610642975.3A patent/CN106295445B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110039601A1 (en) * | 2008-04-18 | 2011-02-17 | Shanghai Quanray Electronics Co., Ltd | signal enhancer chip for radio frequency identification system and a signal enhancer |
| CN103164730A (en) * | 2011-12-09 | 2013-06-19 | 苏州木兰电子科技有限公司 | Dual-frequency radio frequency electronic tag |
| CN202887237U (en) * | 2012-08-27 | 2013-04-17 | 江苏优因特智能科技有限公司 | Radio-frequency-signal controllable activation indicating device |
| CN103218594A (en) * | 2012-11-07 | 2013-07-24 | 无锡成电科大科技发展有限公司 | Radio frequency identification terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103646228B (en) | 2017-02-08 |
| CN106295445A (en) | 2017-01-04 |
| CN106295445B (en) | 2020-05-22 |
| CN106446734A (en) | 2017-02-22 |
| CN106446734B (en) | 2019-04-23 |
| CN106295444A (en) | 2017-01-04 |
| CN106295446B (en) | 2019-06-18 |
| CN103646228A (en) | 2014-03-19 |
| CN106295444B (en) | 2020-05-22 |
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