CN106295446B - Multiple antennas activate source with accurate positioning function - Google Patents
Multiple antennas activate source with accurate positioning function Download PDFInfo
- Publication number
- CN106295446B CN106295446B CN201610643217.3A CN201610643217A CN106295446B CN 106295446 B CN106295446 B CN 106295446B CN 201610643217 A CN201610643217 A CN 201610643217A CN 106295446 B CN106295446 B CN 106295446B
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- antenna
- circuit
- frequency
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- low frequency
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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 activate source with accurate positioning function, and low frequency activation signal is carried out power amplification and generates low frequency radio frequency signal by power MOS pipe drive module；The power control circuit between low frequency radio frequency circuit and governor circuit, the power control circuit is for adjusting low-frequency antenna transmission power；First toggle switch, the first toggle switch one end is connected to the governor circuit, the other end is connected to the second toggle switch, RS485 communicating circuit and high frequency wireless module for operating mode to be arranged, the operating mode include effective number of antennas, the order of work of each antenna, the transmission power of each antenna, each antenna operating time；Respectively the other end is all connected to the governor circuit for second toggle switch, RS485 communicating circuit and high frequency wireless module.Power consumption of the present invention is lower, and waking up distance can be accurately controlled within the scope of 0.5 ~ 7 meter, and data communication is apart from unaffected.
Description
Technical field
The present invention relates to radio frequency identification field more particularly to a kind of multiple antennas activation with accurate positioning function
Source.
Background technique
In recent years, Internet of Things is a new technology of people's common concern, one as Internet of Things of Radio Frequency Identification Technology
Key technology is rapidly developed.The management of the complex environments such as cell, mining area, highway is constantly subjected to national departments concerned
Pay much attention to, but due to caused by negligent supervision dispute even accident still occur repeatedly, cause many personal and country
Interests unnecessary loss.How Strengthening managing measure, how accurate, real-time, fast grasp residential area Nei Feiben is small
The Efficient Operation of area's personnel state, mining area personnel distribution and mobility status, highway toll efficiency and burst accident rescue is state
Relevant department, family problem in the urgent need to address.Change backward management mode, realizes that the modernization of management, informationization are from root
The important channel solved these problems in sheet.
Currently, the low frequency activation source used in practice is all single antenna, the transmitting range of activate source is usually on 5 meters of left sides
The right side, range of signal is smaller, is easy activation less than label, and low-frequency antenna has certain directionality, the low frequency that it is emitted
Signal field is not circular but oval, which results in the signal strength of label in different directions is inconsistent, even
There is no signal, therefore cannot be accurately positioned yet, brings many inconvenient and trouble to management.Meanwhile also just due to existing low frequency
Activate source is single antenna, and people must cover identical region to arrange more equipment, and when installation
It has to be ensured that their signal cannot have intersection, it otherwise will interfere with each other and generate signal blind zone, so, both increase
Equipment cost, also increases difficulty of construction, and after multiple antennas low frequency activation source comes out, competitiveness just shows very low
Under.
Summary of the invention
The present invention provides a kind of multiple antennas activate source with accurate positioning function, this radio-frequency recognition system increases low frequency
The coverage area of signal improves the stability of low frequency signal, solves the interference problem between each antenna, and it is accurately fixed to may be implemented
Small, multiple card reader read the same electronics simultaneously apart from signal cover that is adjustable, solving single antenna activate source for position, identification
Label and unstable puzzlement, and power consumption is reduced, the service life of battery is extended, it can long trouble free running.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of multiple antennas with accurate positioning function swashs
Work-source, comprising: memory, for storing each low-frequency antenna ID coding and antenna activation source ID coding；
Low frequency radio frequency circuit and several low-frequency antennas being connected with low frequency radio frequency circuit, the low frequency radio frequency circuit include
Concatenated and door and power MOS pipe drive module, it is described to be used to arrive the data signal modulation from governor circuit with door
125KHz carrier signal forms low frequency activation signal, and the power MOS pipe drive module puts low frequency activation signal progress power
It is big to generate low frequency radio frequency signal；
The power control circuit between low frequency radio frequency circuit and governor circuit, the power control circuit is for adjusting low frequency
Antenna transmission power；
First toggle switch, the first toggle switch one end are connected to the governor circuit, and the other end is connected to for setting
The second toggle switch, RS485 communicating circuit and high frequency wireless module of operating mode are set, the operating mode includes effective day
Line number mesh, the order of work of each antenna, the transmission power of each antenna, each antenna operating time；Second dial-up
Respectively the other end is all connected to the governor circuit, the RS485 communication for switch, RS485 communicating circuit and high frequency wireless module
By carrying out configuration of the signal realization of automatic network to governor circuit operating mode, the high frequency wireless module passes through to be come wirelessly circuit
Realize the configuration to governor circuit operating mode；
Governor circuit encodes the low-frequency antenna ID from memory according to set operating mode, antenna activation source
ID coding contains low-frequency antenna ID coding, antenna activation source ID coding and operating mode information by low frequency radio frequency circuit evolving
Low frequency activation signal；
The antenna activation source further includes a signal lamp for being connected to the governor circuit, is used to show that antenna to swash
The working condition of work-source；
The antenna activation source further includes a power-switching circuit, for providing electric energy to antenna activation source.
The further improved technical solution of above-mentioned technical proposal is as follows:
1. in above scheme, the antenna activation source further includes a signal lamp for being connected to the governor circuit,
For showing the working condition in antenna activation source.
2. in above scheme, the antenna activation source further includes a power-switching circuit, for being provided to antenna activation source
Electric energy.
3. in above scheme, the frequency of the low frequency signal is 125KHz.
4. in above scheme, the frequency of the high frequency carrier is 2.45GHz.
Due to the above technical solutions, the present invention has the following advantages over the prior art:
1, the present invention has the multiple antennas activate source of accurate positioning function, and which increase the coverage areas of low frequency signal, mention
The stability of low-and high-frequency signal solves the interference problem between each antenna, may be implemented be accurately positioned, identify apart from it is adjustable,
The signal cover for solving single antenna activate source is small, multiple card reader read the same electronic tag simultaneously and unstable tired
It disturbs, and reduces power consumption, extend the service life of battery, it can long trouble free running.
2, the present invention has the multiple antennas activate source of accurate positioning function, due to using multiple antennas circuit design, letter
Number coverage area is relatively wider, signal stabilization is high, and working frequency is 125KHz, and realization is easier, and circuit is simple, cost
It is cheap, it is easy to promote and utilize；It uses various ways to adjust transmission power, keeps installation more flexible, is more convenient.
3, the present invention has the multiple antennas activate source of accurate positioning function, by low frequency and high-frequency circuit, wire communication with
Wireless communication line is just right to be fused together, so that working performance is more reliable, use is more convenient, and user, which is more easily accepted by, to be made
With.
4, the present invention has the multiple antennas activate source of accurate positioning function, and the adjustable mode of transmission power is used to design,
Keep its signal cover adjustable, can adapt to more different application environments.
5, the present invention has the multiple antennas activate source of accurate positioning function, by low frequency with high-frequency circuit is just right melts
It closes in a tag system, so that power consumption is lower, waking up distance can be accurately controlled within the scope of 0.5 ~ 7 meter, and data are logical
News are apart from unaffected.
6, the present invention has the multiple antennas activate source of accurate positioning function, and applicating software programming uses unique mode,
So that user is only with carrying, and into when waking up region, system will automatically process relevant information using extremely simple.
Detailed description of the invention
Attached drawing 1(a) it is multiple antennas activate source structural schematic diagram of the present invention；
Attached drawing 1(b) be attached drawing 1(a) partial structural diagram；
Attached drawing 2 is low frequency radio frequency circuit of the present invention and low frequency antenna circuit schematic diagram；
Attached drawing 3 is power control circuit electrical schematics in radio-frequency recognition system of the present invention；
Attached drawing 4 is antenna activation source main program flow chart in radio-frequency recognition system of the present invention；
Attached drawing 5 is that antenna activation source controls subroutine flow chart in radio-frequency recognition system of the present invention；
Attached drawing 6 is radio-frequency recognition system medium-high frequency wireless data communication subroutine flow chart of the present invention；
Attached 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, memory；5, low frequency
Radio circuit；51 and door；52, power MOS pipe drive 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.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments:
A kind of embodiment: multiple antennas activate source with accurate positioning function, comprising: memory 4 is each low for storing
Frequency antenna ID coding and antenna activation source ID coding；
Low frequency radio frequency circuit 5 and several low-frequency antennas being connected with low frequency radio frequency circuit 56, the low frequency radio frequency circuit 5
Including concatenated and door 51 and power MOS pipe drive module 52, described and door 51 is used for will be from the data-signal of governor circuit
Be modulated to 125KHz carrier signal formed low frequency activation signal, the power MOS pipe drive module 52 by low frequency activation signal into
Row power amplification generates low frequency radio frequency signal；
The power control circuit 8 between low frequency radio frequency circuit 5 and governor circuit 7, the power control circuit 8 is for adjusting
6 transmission power of low-frequency antenna；
First toggle switch 9,9 one end of the first toggle switch are connected to the governor circuit 7, and the other end, which is connected to, to be used for
The second toggle switch 10, RS485 communicating circuit 11 and the high frequency wireless module 3 of operating mode are set, and the operating mode includes
Effective number of antennas, the order of work of each antenna, the transmission power of each antenna, each antenna operating time；It is described
Second toggle switch 10, RS485 communicating circuit 11 and the respective other end of high frequency wireless module 3 are all connected to the governor circuit 7,
The RS485 communicating circuit 11 realizes configuration to 7 operating mode of governor circuit by carrying out the signal of automatic network, the high frequency without
Wire module 3 wirelessly realizes the configuration to 7 operating mode of governor circuit by coming；
Governor circuit 7 encodes the low-frequency antenna ID from memory 4 according to set operating mode, antenna activation
ID coding in source is generated by low frequency radio frequency circuit 5 containing low-frequency antenna ID coding, antenna activation source ID coding and operating mode letter
The low frequency activation signal of breath；
The antenna activation source further includes a power-switching circuit 2, for providing electric energy to antenna activation source.
Above-mentioned antenna activation source further includes a signal lamp 1 for being connected to the governor circuit 7, is used to show antenna
The working condition of activate source.
Above-mentioned antenna activation source further includes a power-switching circuit 2, for providing electric energy to antenna activation source.
The frequency of above-mentioned low frequency signal is 125KHz, and the frequency of above-mentioned high frequency carrier is 2.45GHz.
The high frequency antenna is located on circuit board, and data when communication include the number of low frequency signal source, low frequency letter
Number intensity, the ID number of itself, battery level information.The low-frequency antenna can be also possible to 3D antenna, one-dimensional day with one-dimensional antenna
Line has directional effect, and 3D antenna is not limited by direction.The signal lamp is light emitting diode.The system power supply battery
Form is soft package lithium battery.The battery electricity detection method is electric resistance partial pressure detection.
The distance between the dual-frequency label and low frequency signal source can be accurately judged according to low frequency signal intensity value, from
And the communication distance that can accurately control low frequency part indirectly also corresponds to control high frequency section between 0.5 ~ 7 meter
Communication distance.
Multiple antennas low frequency activation source is dispatched from the factory after tested, after installing and setting operating mode, is begun to setting
Operating mode ceaselessly launches outward low frequency activation signal, this low frequency activation signal includes the ID coding and equipment of each antenna
ID coding.When the carrier for carrying double-frequency electronic label enters or passes into signal coverage areas, the signal will be received,
Then label sends card reader for some information for adding label itself after signal resolution with high frequency regimes.It is wrapped in this information
Contain following content: the ID of each antenna in the ID of multiple antennas activate source, activate source, signal strength when receiving signal, mark
The electricity of label, the ID number of label, other information (temperature, humidity, pressure, gravity, speed etc.) etc..Card reader is again in these information
In add oneself ID, final information is then uploaded to upper level management module.Form there are many management module is possible, than
Such as: 1, can be a controller field application equipment, this equipment will carry out at the scene information processing and make corresponding management
Movement, for people's service.2, can be Remote management center operation user application software, the software to these information at
It after reason, or achieves or prompts or continue as other equipment and data etc. are provided, to instruct relevant work personnel are further to be worked.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of multiple antennas activate source with accurate positioning function, it is characterised in that: it include: memory (4), it is every for storing
A low-frequency antenna ID coding and antenna activation source ID coding；
Low frequency radio frequency circuit (5) and several low-frequency antennas (6) being connected with low frequency radio frequency circuit (5), the low frequency radio frequency electricity
Road (5) includes concatenated and door (51) and power MOS pipe drive module (52), described to be used to that governor circuit will be come from door (51)
Data signal modulation to 125KHz carrier signal formed low frequency activation signal, the power MOS pipe drive module (52) will be low
Frequency activation signal carries out power amplification and generates low frequency radio frequency signal；
The power control circuit (8) between low frequency radio frequency circuit (5) and governor circuit (7), the power control circuit (8) are used for
Adjust low-frequency antenna (6) transmission power；
First toggle switch (9), the first toggle switch (9) one end are connected to the governor circuit (7), and the other end is connected to use
In the second toggle switch (10), RS485 communicating circuit (11) and the high frequency wireless module (3) of setting operating mode, the work
Mode include effective number of antennas, the order of work of each antenna, the transmission power of each antenna, each antenna work when
It is long；Respectively the other end is all connected to for second toggle switch (10), RS485 communicating circuit (11) and high frequency wireless module (3)
The governor circuit (7), the RS485 communicating circuit (11) are realized by carrying out the signal of automatic network to governor circuit (7) work
The configuration of mode, the high frequency wireless module (3) wirelessly realize the configuration to governor circuit (7) operating mode by coming；
Governor circuit (7), will be from low-frequency antenna ID coding, the antenna activation of memory (4) according to set operating mode
ID coding in source is generated by low frequency radio frequency circuit (5) containing low-frequency antenna ID coding, antenna activation source ID coding and operating mode
The low frequency activation signal of information；
The antenna activation source further includes a power-switching circuit (2), for providing electric energy to antenna activation source.
2. multiple antennas activate source according to claim 1, it is characterised in that: the antenna activation source further includes one being connected to
The signal lamp (1) of the governor circuit (7), is used to show the working condition in antenna activation source.
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 CN106295446A (en) | 2017-01-04 |
| CN106295446B true 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (6)
| 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 |
| CN101303744A (en) * | 2008-04-18 | 2008-11-12 | 上海坤锐电子科技有限公司 | Chip for signal amplifier of radio frequency recognition system and signal amplifier thereof |
| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|---|
| CN106295446A (en) | 2017-01-04 |
| 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 |
| CN103646228A (en) | 2014-03-19 |
| CN106295444B (en) | 2020-05-22 |
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Granted publication date: 20190618 |