CN105701432B - RF tag identifying system based on multiple antennas - Google Patents
RF tag identifying system based on multiple antennas Download PDFInfo
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- CN105701432B CN105701432B CN201610110951.3A CN201610110951A CN105701432B CN 105701432 B CN105701432 B CN 105701432B CN 201610110951 A CN201610110951 A CN 201610110951A CN 105701432 B CN105701432 B CN 105701432B
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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
- G06K7/10297—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 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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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
- G06K7/10356—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
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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
- G06K7/10366—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 the interrogation device being adapted for miscellaneous applications
- G06K7/10415—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 the interrogation device being adapted for miscellaneous applications the interrogation device being fixed in its position, such as an access control device for reading wireless access cards, or a wireless ATM
- G06K7/10425—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 the interrogation device being adapted for miscellaneous applications the interrogation device being fixed in its position, such as an access control device for reading wireless access cards, or a wireless ATM the interrogation device being arranged for interrogation of record carriers passing by the interrogation device
Abstract
The present invention discloses a kind of RF tag identifying system based on multiple antennas, including：Memory encodes for storing each low-frequency antenna ID codings and antenna activation source ID；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, the power control circuit are used to adjust low-frequency antenna transmission power；Dual-band radio frequency electronic tag, including：Low frequency reception antenna for receiving the low frequency radio frequency signal from antenna activation source, and generates the inductive signal containing signal source code；Low-frequency channel generates low-frequency information signal according to the inductive signal from low frequency reception antenna；High-frequency circuit, for the intensity id signal from microcontroller, signal source code and electronic tag ID number to be modulated into encoded signal；High frequency antenna, for encoded signal to be emitted to by high frequency carrier in space.Invention increases the coverage areas of low frequency signal, improve the stability of low frequency signal, and signal cover is adjustable, can adapt to more different application environments.
Description
Technical field
The present invention relates to field of radio frequency identification more particularly to a kind of RF tag identifying systems based on multiple antennas.
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 it is accurate, real-time, fast grasp residential area Nei Feiben it 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
The problem of relevant department of family is in the urgent need to address.Change backward management mode, realize that the modernizing of management, informationization is from root
These important channel is solved the problems, such as in sheet.
At present, the low frequency activation source used in practice is all single antenna, and the transmitting range of activate source is usually on 5 meters of left sides
The right side, range of signal is smaller, and easily activation is less than label, and low-frequency antenna has certain directionality, the low frequency that it is emitted
Signal field is not circular but oval, and the signal strength which results in 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, and when installation to arrange more equipment
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 coming out in multiple antennas low frequency activation source, competitiveness just shows very low
Under.
Invention content
The present invention provides a kind of RF tag identifying system based on multiple antennas, this RF tag identification based on multiple antennas
System increases the coverage area of low frequency signal, improves the stability of low frequency signal, solves the interference problem between each antenna,
Can realize be accurately positioned, identify apart from signal cover that is adjustable, solving single antenna activate source is small, multiple card reader simultaneously
Same electronic tag and unstable puzzlement are read, and reduces power consumption, extends the service life of battery, it can for a long time without reason
Barrier running.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of RF tag identification system based on multiple antennas
System, including antenna activation source, dual-band radio frequency electronic tag and card reader, antenna activation source is according to the operating mode of setting to outgoing
Low frequency activation signal is penetrated, the dual-band radio frequency electronic tag receives low frequency activation signal and will be added after low frequency activation signal resolution
Into high-frequency coding signal, the card reader receives this high-frequency coding signal for intensity id signal, electronic tag ID number modulates information；
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
Series connection with door and power MOS pipe drive module, it is described with door for the data signal modulation from governor circuit to be arrived
125KHz carrier signals form low frequency activation signal, and the power MOS pipe drive module puts low frequency activation signal progress power
Big generation low frequency radio frequency signal；
The power control circuit between low frequency radio frequency circuit and governor circuit, the power control circuit are used to adjust 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 set
The second toggle switch, RS485 communicating circuits and high frequency wireless module of operating mode are put, 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 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, for will 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；
The microcontroller of electronic tag ID number is stored with, 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, perform 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,
For showing the working condition in 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, a lithium battery for being connected to dual-band radio frequency electronic tag is further included, is 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. in said program, further including an indicator light, the microcontroller is connected to, 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：
1st, radio-frequency recognition system of the present invention increases the coverage area of low frequency signal, improves the stability of low frequency signal, solution
Interference problem between certainly each antenna can be realized and be accurately positioned, identify apart from signal that is adjustable, solving single antenna activate source
Coverage area is small, multiple card reader read same electronic tag and unstable puzzlement, and reduce power consumption simultaneously, extends
The service life of battery, can long trouble free running.
2nd, radio-frequency recognition system of the present invention is as a result of multiple antennas circuit design, and signal cover is relatively wider, signal
Stability is high, and working frequency is 125KHz, and realization is easier, and circuit is simple, of low cost, easy to utilize；Its
Transmission power is adjusted using various ways, makes installation more flexible, is more convenient.
3rd, radio-frequency recognition system of the present invention is just right by low frequency and high-frequency circuit, wire communication and wireless communication line
It is merged so that working performance is more reliable, and use is more convenient, and user is more easily accepted by using.
4th, radio-frequency recognition system of the present invention is designed using the adjustable mode of transmission power, makes its signal cover adjustable,
It can adapt to more different application environments.
5th, radio-frequency recognition system of the present invention by low frequency with high-frequency circuit is just right merges in a tag system, make
It is lower to obtain power consumption, waking up distance can be accurately controlled in the range of 0.5 ~ 7 meter, and data communication is apart from unaffected.
6th, radio-frequency recognition system applicating software programming of the present invention uses unique mode so that uses extremely simple, user
Only with carrying, into when waking up region, system will automatically process relevant information.
Description of the drawings
Attached drawing 1 is the RF tag identifying system structure diagram the present invention is based on multiple antennas；
Attached drawing 2 is low frequency radio frequency circuit and low frequency antenna circuit schematic diagram in radio-frequency recognition system of the present invention；
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 charts in radio-frequency recognition system 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 is interrupted for timer 1 of the present invention（High-frequency data is sent）Service subprogram flow chart；
Attached drawing 12 is interrupted for timer 2 of the present invention（Timing configured）Service subprogram flow chart.
In the figures above：1st, antenna activation source；2nd, dual-band radio frequency electronic tag；3rd, card reader；4th, memory；5th, low frequency is penetrated
Frequency circuit；51 and door；52nd, power MOS pipe drive module；6th, low-frequency antenna；7th, governor circuit；8th, power control circuit；9th,
One toggle switch；10th, the second toggle switch；11st, RS485 communicating circuits；12nd, high frequency wireless module；13rd, low frequency reception antenna；
14th, low-frequency channel；15th, high-frequency circuit；16th, microcontroller；17th, high frequency antenna；18th, signal lamp；19th, power supply conversion electricity
Road；20th, lithium battery；21st, voltage detection unit；22nd, indicator light.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments：
Embodiment：A kind of RF tag identifying system based on multiple antennas, including antenna activation source 1, dual band radio frequency electronics
Label 2 and card reader 3, antenna activation source 1 emit low frequency activation signal, the dual band radio frequency outward according to the operating mode of setting
Electronic tag 2 receives low frequency activation signal and intensity id signal, electronic tag ID number will be added after low frequency activation signal resolution
Modulates information receives this high-frequency coding signal into 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 6 being connected with low frequency radio frequency circuit 5, the low frequency radio frequency circuit 5
Including series connection and door 51 and power MOS pipe drive module 52, it is described with door 51 for will the 125KHz phases from governor circuit
To high-frequency carrier signal together with 4KHz rather low-frequency data-signal hybrid modulations, become to be easy to the relative high frequency of 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., 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 are used to adjust
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
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 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 believed by the generation of low frequency radio frequency circuit 5 containing low-frequency antenna ID codings, antenna activation source ID codings and operating mode
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, for will the intensity id signal from microcontroller 16, 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；
The microcontroller 16 of electronic tag ID number is stored with, suspend mode is realized according to the low-frequency information signal and opens
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, perform 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.
It further includes：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 is pressed, this battery electricity detection method is detected for electric resistance partial pressure, profit
With AD converter included inside microcontroller, it can accurately determine the voltage of battery, compared with external A/D converter, reduce
The power consumption of label, while the cost of label is reduced again, be conducive to promote the use of.
An indicator light 22 is further included, the microcontroller 16 is connected to, 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 during 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 with one-dimensional antenna or 3D antennas, one-dimensional day
Line has directional effect, and 3D antennas are 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 detected for electric resistance partial pressure.
The microcontroller 16 is embedded in one and is calculated for analyzing the software of the number of low frequency signal source and its signal strength
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
During header, just start 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 intercept pattern.
The distance between the dual-frequency label and low frequency signal source can accurately be judged according to low frequency signal intensity value, from
And the communication distance of low frequency part can be accurately controlled between 0.5 ~ 7 meter, it indirectly also corresponds to control high frequency section
Communication distance.
During using above-mentioned dual-band radio frequency electronic tag, using the characteristic of radio-frequency signal, 125KHz low frequency signals exist
Propagation rate in air 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 frequency ranges
The communication speed of radio is disposed as highest 4Kbps and 2Mbps.Time used in so identical communication data amount 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；Secondly, it can realize
Closely triggering wakes up, on the one hand the function of remote data communication has reached pinpoint purpose, on the other hand due to this
The electronic tag overwhelming majority time is in deep sleep state, and power consumption is extremely low, can allow the electricity of single lithium battery for it
Using the longer time, extend the service life of label.
Dual-frequency label circuit board is 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 battery level information of dual-frequency label, dual-frequency label ID number（And other information）According to the form of regulation with high frequency
Form be sent to distant card reader 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 understood it is found that waking up 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 obtained can be parsed according to fixed form,
And these data are temporarily stored in reader respectively and are neutralized according to fixed agreement with wired（RS485/RS232/ Ethernets/light
Deng）It is or wireless（GPRS/CDMA/WIFI/3G etc.）Mode these information are uploaded to management and dispatching center.Remote management is dispatched
After center receives data, it is possible 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 plus 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：1st, can be the field applications equipment such as a controller, this equipment will carry out information processing at the scene and make corresponding management
Action is serviced for people.2nd, can be the user application software that is run in Remote management center, the software to these information at
It after reason or achieves or prompts or continue as other equipment offer data etc., 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 can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent change or modification that Spirit Essence is made, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of RF tag identifying system based on multiple antennas, it is characterised in that：Including antenna activation source, dual band radio frequency electronics
Label（2）And card reader（3）, antenna activation source emits low frequency activation signal, the double frequency outward according to the operating mode of setting
Radio electronic label（2）It receives low frequency activation signal and intensity id signal, electronics mark will be added after low frequency activation signal resolution
ID number modulates information is signed into high-frequency coding signal, the card reader（3）Receive this high-frequency coding signal；
The antenna activation source, including：Memory（4）, compiled for storing each low-frequency antenna ID codings and antenna activation source ID
Code；
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 series connection 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 generation 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）
For 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）It is realized by the signal for carrying out automatic network 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）Generation contains 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）, for receiving the low frequency radio frequency signal from antenna activation source, and generate and compiled containing signal source
The inductive signal of code；
Low-frequency channel（14）, according to from low frequency reception antenna（13）Inductive signal generation 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, perform 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；
Further include an indicator light（22）, it is connected to the microcontroller（16）, it is used to indicate dual-band radio frequency electronic tag（2）Work
Make state.
2. the RF tag identifying system according to claim 1 based on multiple antennas, it is characterised in that：The high frequency carrier
Frequency be 2.45GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610110951.3A CN105701432B (en) | 2013-11-27 | 2013-11-27 | RF tag identifying system based on multiple antennas |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613605.3A CN103646230B (en) | 2013-11-27 | 2013-11-27 | Radio-frequency recognition system based on double-frequency electronic label |
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| CN104103269A (en) * | 2014-06-30 | 2014-10-15 | 上海科泰信息技术有限公司 | Audio identification electronic tag |
| CN104253634B (en) * | 2014-07-24 | 2016-05-11 | 上海励识电子科技有限公司 | Double frequency multi-protocols multifunctional near-field communication integrate system and methods for using them |
| CN104391933B (en) * | 2014-11-21 | 2017-11-07 | 长江大学 | The database access limits device of identity-based identification |
| CN104853420B (en) * | 2015-05-08 | 2019-04-16 | 苏州工业园区优频科技有限公司 | A kind of double frequency WiFi module based on cellular wake-up mechanism |
| CN105046768A (en) * | 2015-06-25 | 2015-11-11 | 苏州木兰电子科技有限公司 | Vehicle access management system based on radio frequency identification |
| CN105426802B (en) * | 2015-08-24 | 2018-09-11 | 桂林理工大学 | A kind of parallel intelligent recognition anti-collision algorithm of more people |
| CN105608436B (en) * | 2015-12-23 | 2021-10-22 | 联想(北京)有限公司 | Power consumption control method and electronic equipment |
| DE102016207424A1 (en) * | 2016-04-29 | 2017-11-02 | Siemens Aktiengesellschaft | Transponder, in particular RFID transponder, and method for operating a, in particular RFID, transponder |
| CN106529360A (en) * | 2016-11-01 | 2017-03-22 | 公安部第三研究所 | Radio frequency read-write device |
| CN107395248B (en) * | 2017-08-08 | 2022-11-18 | 大器物联科技（广州）有限公司 | Equipment capable of realizing dual-role communication and method for realizing dual-role communication on single equipment |
| CN109547049A (en) * | 2017-09-20 | 2019-03-29 | 杭州米越科技有限公司 | A kind of adjustable low frequency signal emitting-receiving system of range and its adjusting method |
| CN108388820B (en) * | 2018-04-24 | 2023-12-12 | 上海坤锐电子科技有限公司 | Signal mode detection device, dual-frequency passive electronic tag and electronic tag system |
| CN109359493A (en) * | 2018-09-04 | 2019-02-19 | 北京万物纵横科技有限公司 | A kind of label statistical system and method based on three-dimensional array |
| CN109377149A (en) * | 2018-12-26 | 2019-02-22 | 徐工集团工程机械有限公司 | The automobile-used equipment management system of Rescue Kits and Rescue Kits vehicle |
| CN109963331A (en) * | 2019-04-04 | 2019-07-02 | 广州朗昇网络科技有限公司 | A kind of radio-frequency transmissions terminal and its application site, Poewr control method and system |
| CN114528958B (en) * | 2022-02-18 | 2024-03-29 | 北京瑞尔世维医学研究有限公司 | Non-contact passive digital type two-stage collimator coding and identifying system |
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| CN105701432A (en) | 2016-06-22 |
| CN103646230A (en) | 2014-03-19 |
| CN103646230B (en) | 2017-03-15 |
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