CN105787410B - Multiple antennas rfid device for electronic tag - Google Patents
Multiple antennas rfid device for electronic tag Download PDFInfo
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- CN105787410B CN105787410B CN201610110900.0A CN201610110900A CN105787410B CN 105787410 B CN105787410 B CN 105787410B CN 201610110900 A CN201610110900 A CN 201610110900A CN 105787410 B CN105787410 B CN 105787410B
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- 230000004913 activation Effects 0.000 claims abstract description 62
- 229910052744 lithium Inorganic materials 0.000 claims description 18
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
- G06K7/10346—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 the antenna being of the far field type, e.g. HF types or dipoles
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
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Abstract
The present invention discloses a kind of multiple antennas rfid device for electronic tag, its antenna activation source emits low frequency activation signal outward according to the operating mode of setting, and dual-band radio frequency electronic tag receives low frequency activation signal and will add intensity id signal, electronic tag ID number modulates information after low frequency activation signal resolution into high-frequency coding signal；Antenna activation source, including：Memory, for storing each low-frequency antenna ID codings and antenna activation source ID codings；Low frequency radio frequency circuit and several low-frequency antennas being connected with low frequency radio frequency circuit；The power control circuit between low frequency radio frequency circuit and governor circuit；Low-frequency antenna ID codings, antenna activation source ID from memory are encoded the low frequency activation signal for containing low-frequency antenna ID codings, antenna activation source ID coding and operating mode information by low frequency radio frequency circuit evolving by governor circuit according to set operating mode.Present invention realization is accurately positioned, identifies apart from adjustable, increases the coverage area of low frequency signal.
Description
Technical field
The present invention relates to radio frequency identification field more particularly to a kind of multiple antennas radio frequency identification dresses for electronic tag
It sets.
Background technology
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 has obtained rapid development.The management of the complex environments such as cell, mining area, highway is constantly subjected to national departments concerned
Pay much attention to, but dispute even accident still occurs repeatedly caused by negligent supervision, causes 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 of family problem in the urgent need to address.Change backward management mode, realizes that the modernizing of management, informationization is 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, many inconvenient and trouble is brought 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.
Invention content
The present invention provides a kind of multiple antennas rfid device for electronic tag, this multiple antennas rfid device increases
The big coverage area of low frequency signal, improves the stability of low frequency signal, solves the interference problem between each antenna, Ke Yishi
It is now accurately positioned, identifies small, multiple card reader apart from signal cover that is adjustable, solving single antenna activate source while reading same
One electronic tag and unstable puzzlement, and power consumption is reduced, the service life of battery is extended, it can long trouble free fortune
Make.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of multiple antennas radio frequency for electronic tag is known
Other device, including antenna activation source, dual-band radio frequency electronic tag and card reader, antenna activation source according to the operating mode of setting to
Outer transmitting low frequency activation signal, the dual-band radio frequency electronic tag receive low frequency activation signal and will be after low frequency activation signal resolutions
In addition intensity id signal, electronic tag ID number modulates information, at high-frequency coding signal, the card reader receives this high-frequency coding
Signal；
The antenna activation source, including：Memory is compiled for storing each low-frequency antenna ID codings and antenna activation source ID
Code；
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 signals form 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 circuits and high frequency wireless module of operating mode are set, the operating mode includes effective day
The operating time of line number mesh, the order of work of each antenna, the transmission power of each antenna, each antenna；Second dial-up
Respectively the other end is all connected to the governor circuit, the RS485 communications for switch, RS485 communicating circuits 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 codings contain low-frequency antenna ID codings, antenna activation source ID codings and operating mode information by low frequency radio frequency circuit evolving
Low frequency activation signal；
The dual-band radio frequency electronic tag, including：
Low frequency reception antenna for receiving the low frequency radio frequency signal from antenna activation source, and is generated and is compiled containing signal source
The inductive signal of code；
Low-frequency channel generates low-frequency information signal according to the inductive signal from low frequency reception antenna；
High-frequency circuit is used for the intensity id signal from microcontroller, signal source code and electronic tag ID number tune
Encoded signal is made；
High frequency antenna, for encoded signal to be emitted to by high frequency carrier in space；
It is stored with the microcontroller of electronic tag ID number, suspend mode and startup are realized according to the low-frequency information signal
The switching of state, this microcontroller are programmed to：
Step 1: read the low-frequency information signal and intensity id signal is generated according to its intensity,
Step 2: analyze and extract the low-frequency information signal and signal source code is generated according to it,
Step 3: starting timer interruption in a time interval, under interrupt status, execute successively：Open the height
Frequency circuit closes the high-frequency circuit and opens low-frequency channel,
Step 4: when the duration reaches the time interval, then the timer interruption is exited.
The further improved technical solution of above-mentioned technical proposal is as follows：
1. in said program, the antenna activation source further includes a signal lamp for being connected to the governor circuit,
Working condition for showing antenna activation source.
2. in said program, the antenna activation source further includes a power-switching circuit, for being provided to antenna activation source
Electric energy.
3. in said program, further including a lithium battery for being connected to dual-band radio frequency electronic tag, being used to provide power supply；
Voltage detection unit between the lithium battery and microcontroller, the interpretation compared with threshold voltage by the voltage from power supply
The electricity size of the lithium battery.
4. further including an indicator light in said program, it is connected to the microcontroller, is used to indicate dual band radio frequency electronics
The working condition of label.
5. in said program, the frequency of the low frequency signal is 125KHz.
6. in said program, the frequency of the high frequency carrier is 2.45GHz.
Since above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
1, the present invention is used for the multiple antennas rfid device of electronic tag, which increase the coverage area of low frequency signal,
The stability for improving low frequency signal, solves the interference problem between each antenna, may be implemented to be accurately positioned, identifies that distance can
It adjusts, the signal cover of solution single antenna activate source is small, multiple card reader read the same electronic tag simultaneously and unstable
Puzzlement, and reduce power consumption, extend the service life of battery, can long trouble free running.
2, the present invention is used for the multiple antennas rfid device of electronic tag, as a result of multiple antennas circuit design,
Signal cover is relatively wider, signal stabilization is high, and working frequency is 125KHz, and realization is easier, and circuit is simple, at
This is cheap, easy to utilize；It adjusts transmission power using various ways, keeps installation more flexible, is more convenient.
3, the present invention is used for the multiple antennas rfid device of electronic tag, by low frequency and high-frequency circuit, wire communication
With wireless communication line is just right is merged so that working performance is more reliable, and use is more convenient, and user is more easily accepted by
It uses.
4, the present invention is used for the multiple antennas rfid device of electronic tag, and the adjustable mode of transmission power is used to set
Meter, keeps its signal cover adjustable, can adapt to more different application environments.
5, the present invention is used for the multiple antennas rfid device of electronic tag, and low frequency and high-frequency circuit is just right
Fusion is in a tag system so that power consumption is lower, and waking up distance can be accurately controlled within the scope of 0.5 ~ 7 meter, and data
Communication distance is unaffected.
6, the present invention is used for the multiple antennas rfid device of electronic tag, and applicating software programming uses unique side
Formula so that use is extremely simple, and user is only with carrying, and into when waking up region, system will automatically process relevant information.
Description of the drawings
Attached drawing 1 is the multiple antennas rfid device structural schematic diagram that the present invention is used for electronic tag；
Attached drawing 2 is low frequency radio frequency circuit and low frequency antenna circuit schematic diagram in rfid device of the present invention；
Attached drawing 3 is power control circuit electrical schematics in multiple antennas rfid device of the present invention；
Attached drawing 4 is antenna activation source main program flow chart in multiple antennas rfid device of the present invention；
Attached drawing 5 is that antenna activation source controls subroutine flow chart in multiple antennas rfid device of the present invention；
Attached drawing 6 is multiple antennas rfid device medium-high frequency wireless data communication subroutine flow chart of the present invention；
Attached drawing 7 is RS485 communicating circuit subroutine flow charts in multiple antennas rfid device of the present invention；
Attached drawing 8 is hardware system structure schematic diagram of the present invention；
Attached drawing 9 is main program flow chart of the present invention；
Attached drawing 10 is external wake interrupt service subroutine flow chart of the present invention；
Attached drawing 11 interrupts for timer 1 of the present invention（High-frequency data is sent）Service subprogram flow chart；
Attached drawing 12 interrupts for timer 2 of the present invention（Timing configured）Service subprogram flow chart.
In the figures above：1, antenna activation source；2, dual-band radio frequency electronic tag；3, card reader；4, memory；5, low frequency is penetrated
Frequency circuit；51 and door；52, power MOS pipe drive module；6, low-frequency antenna；7, governor circuit；8, power control circuit；9,
One toggle switch；10, the second toggle switch；11, RS485 communicating circuits；12, high frequency wireless module；13, low frequency reception antenna；
14, low-frequency channel；15, high-frequency circuit；16, microcontroller；17, high frequency antenna；18, signal lamp；19, power supply conversion electricity
Road；20, lithium battery；21, voltage detection unit；22, indicator light.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and embodiments：
Embodiment：A kind of multiple antennas rfid device for electronic tag, including antenna activation source 1, dual band radio frequency
Electronic tag 2 and card reader 3, antenna activation source 1 emit low frequency activation signal, the double frequency outward according to the operating mode of setting
Radio electronic label 2 receives low frequency activation signal and will add intensity id signal, electronic tag after low frequency activation signal resolution
ID number modulates information receives this high-frequency coding signal at high-frequency coding signal, the card reader 3；
The antenna activation source 1, including：Memory 4, for storing each low-frequency antenna ID codings 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 with door 51 and power MOS pipe drive module 52, described be used for door 51 will be from the 125KHz phases of governor circuit
To high-frequency carrier signal together with 4KHz rather low-frequency data-signal hybrid modulations, become the relative high frequency for being easy to antenna transmitting
（125KHz）Signal（Claim signal-A）, the voltage of signal-A signals is 3V, electric current 5mA, and power only has 15mW, passes through day
Line is not enough to reach ideal using effect after launching, so increase power amplification circuit thereafter, i.e., the described work(
Rate metal-oxide-semiconductor drive module 52, the module amplify the low-power signal signal-A of 3V/5mA by its voltage by voltage and current
It is enlarged into 12V, 200mA respectively with electric current, the signal that power is 2.4W（Claim singal-B）, power amplification multiple is 160 times, with
Signal-B is sent to low-frequency antenna 6 afterwards, and wired electric signal is converted to electromagnetic wave by low-frequency antenna 6 by LC oscillating circuits
Form is emitted in air；
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 circuits 11 and the high frequency wireless module 12 of operating mode are set, and the operating mode includes
The operating time of effective number of antennas, the order of work of each antenna, the transmission power of each antenna, each antenna；It is described
Second toggle switch 10, RS485 communicating circuits 11 and the 12 respective other end of high frequency wireless module are all connected to the governor circuit
7, the RS485 communicating circuits 11 are by coming configuration of the signal realization of automatic network to 7 operating mode of governor circuit, the high frequency
Wireless module 12 is by carrying out the wireless configuration realized to 7 operating mode of governor circuit；
Governor circuit 7 encodes the low-frequency antenna ID from memory 4 according to set operating mode, antenna activation
ID codings in source are generated by low frequency radio frequency circuit 5 containing low-frequency antenna ID codings, antenna activation source ID codings and operating mode letter
The low frequency activation signal of breath；
The dual-band radio frequency electronic tag 2, including：
Low frequency reception antenna 13 for receiving the low frequency radio frequency signal from antenna activation source 1, and generates and contains signal source
The inductive signal of coding；
Low-frequency channel 14 generates low-frequency information signal according to the inductive signal from low frequency reception antenna 13；
High-frequency circuit 15 is used for intensity id signal, signal source code and electronic tag ID from microcontroller 16
Number it is modulated into encoded signal；
High frequency antenna 17, for encoded signal to be emitted to by high frequency carrier in space；
It is stored with the microcontroller 16 of electronic tag ID number, suspend mode is realized according to the low-frequency information signal and is opened
The switching of dynamic state, this microcontroller 16 are programmed to：
Step 1: read the low-frequency information signal and intensity id signal is generated according to its intensity,
Step 2: analyze and extract the low-frequency information signal and signal source code is generated according to it,
Step 3: starting timer interruption in a time interval, under interrupt status, execute successively：Open the height
Frequency circuit 15 closes the high-frequency circuit 15 and opens low-frequency channel 14,
Step 4: when the duration reaches the time interval, then the timer interruption is exited.
Above-mentioned antenna activation source 1 further includes a signal lamp 18 for being connected to the governor circuit 7, is used to show day
The working condition of line activate source 1.
Above-mentioned antenna activation source further includes a power-switching circuit 19, for providing electric energy to antenna activation source 1；This lithium electricity
Pond 6 is soft package lithium battery, and the energy density of lithium battery is high, and the lithium battery of Soft Roll form is small, is suitble to make in electronic tag
With.
Further include：One is connected to the lithium battery 20 of dual-band radio frequency electronic tag 2, is used to provide power supply；Positioned at the lithium
Voltage detection unit 21 between battery 20 and microcontroller 16, by the voltage from power supply compared with threshold voltage described in interpretation
The electricity size of lithium battery 20.Voltage detection unit between the lithium battery and microcontroller, by the electricity from power supply
The electricity size of the lithium battery described in interpretation compared with threshold voltage, this battery electricity detection method is pressed to be detected for electric resistance partial pressure, profit
With AD converter included inside microcontroller, it can accurately determine that the voltage of battery reduces compared with external A/D converter
The power consumption of label, while the cost of label is reduced again, be conducive to promote the use of.
Further include an indicator light 22, be connected to the microcontroller 16, is used to indicate the work of dual-band radio frequency electronic tag 2
State.
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 also be 3D antennas, one-dimensional day with one-dimensional antenna
There is line directional effect, 3D antennas not to be 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 detects for electric resistance partial pressure.
The software that the microcontroller 16 is embedded in a number and its signal strength for analyzing low frequency signal source is calculated
Method and one group of software algorithm for reducing power consumption.Fig. 2,3,4,5 are the flow charts of the software algorithm.
Low frequency signal parser is explained：For the signal of low frequency signal source transmitting as unit of frame, each frame data include frame
Head, data start flag, data, end-of-data mark, data check.Dual-frequency label is in the frame for receiving low frequency signal source transmitting
When header, just starts to start AD conversion, the average value of frame head part transformation result is calculated, and as signal strength
Value then proceedes to receive low frequency signal, continues to convert, and with the signal strength values of gained come the data obtained after determining.When one
After frame data receive, then the frame data are analyzed, it is legal, it uses, non-rule abandons.Later low frequency part continue into
Enter the extremely low signal of power consumption and intercepts pattern.
It can accurately judge the distance between the dual-frequency label and low frequency signal source 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.
When using above-mentioned multiple antennas rfid device, the characteristic of radio-frequency signal, 125KHz low frequency signals are utilized
Aerial propagation rate can reach 4Kbps, and the aerial spread speed of 2.45GHz high-frequency signals can reach
2Mbps.Required electric current is about 13mA when system works, and it is standby when required electric current be only 3uA, therefore we are by two
The communication speed of the radio of frequency range is disposed as highest 4Kbps and 2Mbps.When used in so identical communication data amount
Between it is just most short, the time of system standby, the energy consumed was with regard to minimum, and the service life of battery is with regard to longer with regard to longest；It secondly, can
To realize, closely triggering wakes up, and on the one hand the function of remote data communication has reached pinpoint purpose, on the other hand
Since the electronic tag most times are in deep sleep state, power consumption is extremely low, can make the electricity of single lithium battery can
So that it is using the longer time, extend the service life of label.
Dual-frequency label circuit board is to be in deep sleep shape under normal circumstances after installation battery, encapsulation, test manufacture
State, power consumption is extremely low, and overall power is about in 3uA.Only carrying double-frequency electronic label（Abbreviation dual-frequency label）Personnel or object
Body enters the coverage area of low frequency signal source（0.5-7m）When, the low frequency signal detecting chip of dual-frequency label can just detect this letter
Number, and immediately wake up the MCU of dormant state, make it into working condition.Then the number of low frequency signal source, low frequency are believed again
Number intensity, the ID number of the battery level information of dual-frequency label, dual-frequency label（And other information）According to the format of regulation with high frequency
Form be sent to distance card reader farther out or double-frequency card reader.According to this it can be seen that the dual-frequency label has following features：
It closely wakes up, telecommunication, and wake source is it is found that wake up known to distance.Avoid Card Reader distance due to card reader compared with
The problem of far influencing each other.After card reader receives high-frequency wireless signals, the data that can be obtained according to fixed format parsing,
And these data are temporarily stored in reader respectively and are neutralized according to fixed agreement with wired（RS485/RS232/ Ethernets/light
Deng）Or it is wireless（GPRS/CDMA/WIFI/3G etc.）Mode these information are uploaded to management and dispatching center.Remote management is dispatched
After center receives data, so that it may to make corresponding judgement accordingly, and do the work such as further management and dispatching.
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 emits low frequency activation signal outward, this low frequency activation signal includes the ID codings 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 some information that label itself is added after signal resolution are sent to card reader by label 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.）Deng.Card reader is again in these information
In add the ID of oneself, final information is then uploaded to upper level management module.Form there are many management module is possible, than
Such as：1, can be the field applications equipment such as controller, this equipment will carry out information processing at the scene and make corresponding management
Action services for people.2, can be the user application software run in Remote management center, 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 (3)
1. a kind of multiple antennas rfid device for electronic tag, it is characterised in that：Including antenna activation source（1）, double frequency
Radio electronic label（2）And card reader（3）, antenna activation source（1）Emit low frequency activation letter outward according to the operating mode of setting
Number, the dual-band radio frequency electronic tag（2）It receives low frequency activation signal and is identified intensity is added after low frequency activation signal resolution
Signal, electronic tag ID number modulates information are at high-frequency coding signal, the card reader（3）Receive this high-frequency coding signal；
The antenna activation source（1）, including：Memory（4）, for storing each low-frequency antenna ID codings and antenna activation source ID
Coding；
Low frequency radio frequency circuit（5）With several and low frequency radio frequency circuit（5）Connected low-frequency antenna（6）, the low frequency radio frequency electricity
Road（5）Including concatenated and door（51）With power MOS pipe drive module（52）, described and door（51）For governor circuit will to be come from
Data signal modulation to 125KHz carrier signals formed low frequency activation signal, the power MOS pipe drive module（52）It will be low
Frequency activation signal carries out power amplification and generates low frequency radio frequency signal；
Positioned at low frequency radio frequency circuit（5）And governor circuit（7）Between power control circuit（8）, the power control circuit（8）With
In adjusting low-frequency antenna（6）Transmission power；
First toggle switch（9）, first toggle switch（9）One end is connected to the governor circuit（7）, the other end is connected to use
In the second toggle switch of setting operating mode（10）, RS485 communicating circuits（11）With high frequency wireless module（12）, the work
Pattern 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；Second toggle switch（10）, RS485 communicating circuits（11）With high frequency wireless module（12）The respective other end is all connected to
The governor circuit（7）, the RS485 communicating circuits（11）Signal by carrying out automatic network is realized to governor circuit（7）Work
The configuration of pattern, the high frequency wireless module（12）By wirelessly realizing to governor circuit（7）The configuration of operating mode；
Governor circuit（7）, memory will be come from according to set operating mode（4）Low-frequency antenna ID coding, antenna activation
ID codings in source pass through low frequency radio frequency circuit（5）It generates containing low-frequency antenna ID codings, antenna activation source ID codings and operating mode
The low frequency activation signal of information；
The dual-band radio frequency electronic tag（2）, including：
Low frequency reception antenna（13）, antenna activation source is come from for receiving（1）Low frequency radio frequency signal, and generate contain signal source
The inductive signal of coding；
Low-frequency channel（14）, according to from low frequency reception antenna（13）Inductive signal generate low-frequency information signal；
High-frequency circuit（15）, for microcontroller will to be come from（16）Intensity id signal, signal source code and electronic tag ID
Number it is modulated into encoded signal；
High frequency antenna（17）, for encoded signal to be emitted to by high frequency carrier in space；
It is stored with the microcontroller of electronic tag ID number（16）, suspend mode and startup are realized according to the low-frequency information signal
The switching of state, this microcontroller（16）It is programmed to：
Step 1: read the low-frequency information signal and intensity id signal is generated according to its intensity,
Step 2: analyze and extract the low-frequency information signal and signal source code is generated according to it,
Step 3: starting timer interruption in a time interval, under interrupt status, execute successively：Open the high-frequency electrical
Road（15）, close the high-frequency circuit（15）With unlatching low-frequency channel（14）,
Step 4: when the duration reaches the time interval, then the timer interruption is exited；
One is connected to dual-band radio frequency electronic tag（2）Lithium battery（20）, it is used to provide power supply；Positioned at the lithium battery（20）
And microcontroller（16）Between voltage detection unit（21）, by the voltage from power supply compared with threshold voltage lithium described in interpretation
Battery（20）Electricity size.
2. multiple antennas rfid device according to claim 1, it is characterised in that：The frequency of the high frequency carrier is
2.45GHz。
3. multiple antennas rfid device according to claim 1, it is characterised in that：It further include an indicator light（22）, even
It is connected to the microcontroller（16）, it is used to indicate dual-band radio frequency electronic tag（2）Working condition.
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| CN201610110900.0A CN105787410B (en) | 2013-11-27 | 2013-11-27 | Multiple antennas rfid device for electronic tag |
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| CN201610110900.0A CN105787410B (en) | 2013-11-27 | 2013-11-27 | Multiple antennas rfid device for electronic tag |
| CN201310613605.3A CN103646230B (en) | 2013-11-27 | 2013-11-27 | Radio-frequency recognition system based on double-frequency electronic label |
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| CN201310613605.3A Division CN103646230B (en) | 2013-11-27 | 2013-11-27 | Radio-frequency recognition system based on double-frequency electronic label |
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| CN105787410B true CN105787410B (en) | 2018-08-31 |
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| FR3047185B1 (en) * | 2016-10-03 | 2021-01-29 | Biolog | ELEMENT STORAGE DEVICE |
| CN108416240B (en) * | 2018-02-27 | 2021-07-23 | 浙江辉宏地理信息有限公司 | Internet of things RFID label recognition equipment |
| CN111114213A (en) * | 2020-01-03 | 2020-05-08 | 南京泰晟科技实业有限公司 | TPMS automatic calibration device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202275427U (en) * | 2011-11-02 | 2012-06-13 | 南京物联网研究院发展有限公司 | Multi-antenna radio frequency reader |
| 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 |
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| 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 |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202275427U (en) * | 2011-11-02 | 2012-06-13 | 南京物联网研究院发展有限公司 | Multi-antenna radio frequency reader |
| 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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