CN105680913A - Long distance identification apparatus - Google Patents
Long distance identification apparatus Download PDFInfo
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- CN105680913A CN105680913A CN201610129229.4A CN201610129229A CN105680913A CN 105680913 A CN105680913 A CN 105680913A CN 201610129229 A CN201610129229 A CN 201610129229A CN 105680913 A CN105680913 A CN 105680913A
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- module
- identification
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- input
- ffsk
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 229910052744 lithium Inorganic materials 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 239000013589 supplement Substances 0.000 abstract description 3
- 230000007704 transition Effects 0.000 abstract 2
- 238000012546 transfer Methods 0.000 description 5
- 238000012790 confirmation Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- General Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
A long distance identification apparatus is provided. After radio frequency received information is recovered by an FFSK modulation/demodulation module, the information is input to a CPU. CPU output signals are input to a transmit-receive transition module through the FFSK modulation/demodulation module, a PLL frequency modulation module, and an efficient power amplifier module, and the transmit-receive transition module is connected to an antenna. The long distance identification apparatus changes a wireless communication system having overstrict identification conditions, greatly improves the system performance, effectively increases identification distance, changes the data modulation mode, enhances the reception sensitivity, makes a new communication protocol suitable for the system work, and increases the safety and reliability of data transmission. The continuous work capability of an identifier is greatly improved by using a solar battery as an electric energy supplement.
Description
Technical field
The present invention relates to radio frequency identification (RFID) technical field, particularly relate to a kind of remote means of identification for dynamic management.
Background technology
In the rfid system of routine, when being in the useful range of its read write line as the IC-card of transponder, electronic tag etc., transponder just can obtain radiowave that read write line radiates out and be activated, just its radio communication is set up between read write line and transponder, carry out bidirectional data exchange, this kind of exchange information processes by certain format and is encrypted, data transmission security is reliable, therefore this technology be widely used in public transport paying card, vehicle check that test card, identification card etc. closely identify and message exchange field.
But owing to the IC-card transponder volume in the rfid system of routine is little, non-transformer, electric energy can only obtain from the radiowave that read write line radiates out, and though active electronic label is prefixed lithium cell, but duration of service must be unexpectedly limited, and the wireless communication power between read write line is very little, decipherment distance is very limited, and in addition, the reason of RFID function limitation also has the following aspects:
1, frequency range is used easily to be disturbed. The power used at present be less than 100mw not frequency range by Wireless Management Committee stringent regulations be: 13.56MHz, 433MHz, 860-960MHz, 2.45GHz, 5.8GHz, and IC-card the most generally uses 13.56MHZ, electronic tag mostly adopts 2.45GHZ, and therefore rfid system does not slightly note running into disturbed environment. Although International Standards Organization has formulated ISO14443 and ISO15693 standard specially at present for this reason, strict regulation are carried out, but the possibility being interfered still very easily occurs.
2, the mode of data-modulated carrier is too simple. In radio communication system, data must reflect in which feature of carrier wave, could transmit, the amplitude shift keying that conventional RFID adopts and ASK mode. This kind is the simplest method data reflection in the amplitude variations of carrier wave, uses although the electric power supply that ASK additionally provides interruption formula answers device chip, but ASK performance is worst, but due to its demodulation simple and convenient, and must not oneself mode of operation of adopting.
3, transfer rate and sensitivity cannot improve further simultaneously. The transfer speed of conventional RFID needs very high, reaches every second more than 100KBit, because both sides' decipherment distance is very short, data exchange must complete within very short time.But too high transfer rate to be taken wider transmission passband, and the receiving sensitivity of receiving apparatus when passband is wide declines greatly, operating distance will be affected, this is one pair of contradiction, transmission range can not be improved on the one hand by strengthening transmitted power, do not improve again owing to sensitivity is affected by noise on the other hand, current RFID Sensitirity va1ue is caused to be only between-80dBm to-102dBm, even if active label transmitted power is maximum reaches 15dBm (31mw), but systemic effect distance does not still reach the km order of magnitude.
4, antenna efficiency is low. The distance mutually identified between read write line and transponder is very limited, IC-card (passive) decipherment distance is only 2-10cm, active label decipherment distance is at about 80 meters, even if adopting fixed orientation read write line, it has installed the gain directional antenna of band power magnification additional, and its decipherment distance is also difficult to more than 1000 meters. And identifying reliability also with whether transponder is within the scope of the greatest irradiation of read write line relevant, mutual position slightly changes, and recognition capability declines greatly. Therefore conventional RFID identifies while not being useful on any direction and remote identification, owing to these fatal shortcomings exist, causes its range of application to be greatly limited.
Summary of the invention
In order to overcome the problems referred to above that conventional RFID identification system exists, the present invention provides far away, the highly sensitive remote means of identification of a kind of decipherment distance.
The technical scheme that the present invention adopts for achieving the above object is: a kind of remote means of identification, the information input FFSK modulation/demodulation modules of radio frequency reception, information signal input CPU after the process of FFSK modulation/demodulation modules, CPU output signal changes module, transmitting-receiving conversion model calling antenna by FFSK modulation/demodulation modules, PLL FM module, efficient power amplifier module input transmitting-receiving.
The read write line information received is inputted FFSK modulation/demodulation modules by highly sensitive receiver module by described transmitting-receiving conversion module.
Described CPU connects the storer that it is believed that breath for preset number.
Being furnished with chargeable lithium cell group and sun power assisted charging system, sun power assisted charging system comprises solar battery group and power supply management of charging and discharging module, and solar battery group is by power supply management of charging and discharging model calling lithium cell group input terminus.
The remote means of identification of the present invention, emphasis changes the too strict radio communication system of condition for identification, increase substantially system performance, effectively improve decipherment distance, a new height is pushed in RFID application, changes the mode of data modulation, change FFSK into by ASK, (Phase Continuation FSK) channel bandwidth is narrow, it is to increase anti-interference and resist miscode ability. Improve receiving sensitivity, more than-120dBm can be reached, higher than conventional RFID tens times; Transmitting have employed high-level efficiency power amplifier technology; System can adopt isofrequency full-duplex work or single-frequency list work to work two kinds of patterns; Formulate the new communication protocol of applicable system works, safety and reliability when enhancing transfer; Utilize solar cell to supplement as electric energy, substantially increase the ability of recognizer non-stop run.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram of the remote means of identification of the present invention.
Embodiment
As shown in Figure 1, the signal of radio frequency reception inputs CPU to the remote means of identification principle of the present invention after FFSK modulation /demodulation module is recovered. CPU output signal is by FFSK modulation/demodulation modules, PLL FM module, efficient power amplifier module input transmitting-receiving conversion module, and transmitting-receiving conversion model calling antenna, transmitting-receiving forwards antenna to.CPU connects the storer that it is believed that breath for preset number. This transponder is furnished with chargeable lithium cell group and sun power assisted charging system, and sun power assisted charging system comprises solar battery group and power supply management of charging and discharging module, and solar battery group is by power supply management of charging and discharging model calling lithium cell group input terminus.
Each several part principle is as follows:
FFSK modulation/demodulation modules: Fast Frequency Offset key control, is also Phase Continuation frequency shift keying, and the change of data reflects in the change of frequency of modulation signal, and immunity from interference strengthens greatly, takies base band narrower width, and binary decoded characteristic is improved. FFSK is a baseband waveform umformer.
PLL FM module: be the frequency generator of a kind of high stability, for determining frequency range and the frequency of radio communication system, it is possible to flexible configuration. On the frequency required, PLL is also used as high performance frequency modulator. Therefore recognizer can flexible configuration on different working channels. PLL is carried out direct frequency modulation by FFSK signal, selects suitable modulation index, makes frequency modulation performance reach best.
High-level efficiency power amplifier module: adopting C class or the efficient power amplifier of D class, energy conversion efficiency is extremely high.
Highly sensitive receiver module: owing to being the frequency modulation signal of limited bandwidth, can adopt high gain limit width relatively big, obtain high quality and receive, its sensitivity can close-120dBm, higher than routine tens times.
Transmitting-receiving conversion module: share one pair of antenna, it is provided that receive and the switching launched and protection.
Transponder adopts active power supply mode: the battery being furnished with chargeable lithium, in order to make electric energy supplement in time, add sun power assisted charging system.
Agreement flow process: read write line is in the cycle of a regulation, about 4 seconds, within the very short for some time started, only send the Network Recognition code of its own system, read write line ID code, function order code and to the confirmation code after the multiple transponder information received in upper one-period. Transponder, after the Network Recognition receiving read write line and ID code, confirms oneself in recognition network, then according to the function order code received, performs relevant operation. When satisfying condition, just within remaining time in cycle subsequently, by the time window of certain rules selection oneself, upload response information, and in the confirmation to oneself that next cycle reception read write line sends. Receive confirmation, show information transmission success, just no longer respond the same instruction of read write line later, need to send unless there are new function instruction. As received less than confirmation, then continue selection window and retransmit. Owing to the cycle overwhelming majority of read write line is used for uploading of transponder, therefore system design can allow at most 16 transponders to respond together. Simultaneously by confirming, the transponder is made to remove unnecessary duplicate responses from, it is to increase the capacity of system identification.
The sfgd. of transfer: every time only exchange frame data between read write line and transponder; these frame data are first encrypted in order to safety; do 16 CRC verifications again; and above data are made Error Correction of Coding process (entangling a random error) together with the grouping of CRC check code; make interleaving treatment before transmission again, first deinterleaving, error correction during reception, then 16 CRC verifications; finally decipher, recover original frame data. Owing to adopting multiple protection measure; the burst error of the certain length that may cause in wireless transmitting system and any bit random error can be had automatic correction capability by it; therefore when there being interference, system still can work by safety and precise reliably, also effectively increases the distance of identification mutually.
The remote means of identification of the present invention, between read write line and transponder, decipherment distance can reach more than 3000 meters and the farthest can reach 10000 meters, at this moment the output rating of active balise close to or be less than 10mw, be only the 1/3 of conventional RFID active electronic label power.As long as read write line and transponder are within the scope of operating range, can correctly identify no matter what relative status both sides are in. The content identified between read write line and transponder is abundanter, more intelligent. GPS device can be embedded, it is possible to increase and enter the identification in improper region and the function such as upload in transponder.
Its modulator approach can also adopt 2PSK(phase-shift keying (PSK) in the specific implementation), PJM(phase place hopping modulation), GMSK(Gaussian minimum shift keying) etc. various binary modulated mode. Quaternary modulation mode, such as 4FSK, as long as modulator/demodulator does some adjustment, so that it may to adapt to various modulation. Other transceiver part is identical. Agreement and data protection measure also can be general.
Claims (4)
1. a remote means of identification, it is characterized in that: the information input FFSK modulation/demodulation modules of radio frequency reception, information signal input CPU after the process of FFSK modulation/demodulation modules, CPU output signal changes module, transmitting-receiving conversion model calling antenna by FFSK modulation/demodulation modules, PLL FM module, efficient power amplifier module input transmitting-receiving.
2. the remote means of identification of one according to claim 1, it is characterised in that: the read write line information received is inputted FFSK modulation/demodulation modules by highly sensitive receiver module by described transmitting-receiving conversion module.
3. the remote means of identification of one according to claim 1, it is characterised in that: described CPU connects the storer that it is believed that breath for preset number.
4. the remote means of identification of one according to claim 1, it is characterized in that: be furnished with chargeable lithium cell group and sun power assisted charging system, sun power assisted charging system comprises solar battery group and power supply management of charging and discharging module, and solar battery group is by power supply management of charging and discharging model calling lithium cell group input terminus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610129229.4A CN105680913A (en) | 2016-03-08 | 2016-03-08 | Long distance identification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610129229.4A CN105680913A (en) | 2016-03-08 | 2016-03-08 | Long distance identification apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN105680913A true CN105680913A (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610129229.4A Pending CN105680913A (en) | 2016-03-08 | 2016-03-08 | Long distance identification apparatus |
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| CN (1) | CN105680913A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2904118Y (en) * | 2006-02-16 | 2007-05-23 | 深圳市先施科技有限公司 | High-speed remote-passive RF tag reader-writer |
| KR20080019096A (en) * | 2006-08-23 | 2008-03-03 | 에스케이 텔레콤주식회사 | Low power rfid system and method, reader applied to the same |
| CN102252253A (en) * | 2011-05-03 | 2011-11-23 | 安徽天柱绿色能源科技有限公司 | Intelligent burglar-proof solar street lamp |
| CN205490541U (en) * | 2016-03-08 | 2016-08-17 | 李齐营 | Remote recognition device |
-
2016
- 2016-03-08 CN CN201610129229.4A patent/CN105680913A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2904118Y (en) * | 2006-02-16 | 2007-05-23 | 深圳市先施科技有限公司 | High-speed remote-passive RF tag reader-writer |
| KR20080019096A (en) * | 2006-08-23 | 2008-03-03 | 에스케이 텔레콤주식회사 | Low power rfid system and method, reader applied to the same |
| CN102252253A (en) * | 2011-05-03 | 2011-11-23 | 安徽天柱绿色能源科技有限公司 | Intelligent burglar-proof solar street lamp |
| CN205490541U (en) * | 2016-03-08 | 2016-08-17 | 李齐营 | Remote recognition device |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20160615 |