CN205490541U - Remote recognition device - Google Patents
Remote recognition device Download PDFInfo
- Publication number
- CN205490541U CN205490541U CN201620174217.9U CN201620174217U CN205490541U CN 205490541 U CN205490541 U CN 205490541U CN 201620174217 U CN201620174217 U CN 201620174217U CN 205490541 U CN205490541 U CN 205490541U
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- module
- modulation
- ffsk
- distance
- cpu
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 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
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000004891 communication Methods 0.000 abstract description 8
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000012790 confirmation Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
Classifications
-
- 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
Abstract
The utility model provides a CPU is inputed to the signal after FFSK modulation demodulation module resumes, and CPU output signal passes through FFSK modulation demodulation module, PLL frequency modulation module, high -efficient power amplifier module and radiates the antenna through receiving and dispatching conversion module of remote recognition device, behind radio frequency receiver. The utility model discloses a remote recognition device has changed the too strict wireless communication system of condition for identification, has increased substantially system performance, has improved identification distance effectively, has changed the mode of data modulation, has improved the reception sensitivity, has formulated the new communication protocol of suitable system work, security and reliability when having strengthened data transmission, utilize solar battery to supply as the electric energy, improved the ability of recognizer continuous operation greatly.
Description
Technical field
This utility model relates to radio frequency identification (RFID) technical field, particularly relates to a kind of identify device at a distance for dynamically management.
Background technology
In conventional rfid system, when being in the effective range of its read write line as the IC-card of transponder, electronic tag etc., transponder just can obtain radio wave that read write line gives off and be activated, just its radio communication is set up between read write line and transponder, carry out bidirectional data exchange, this exchange information is processed by certain format and is encrypted, data transmission security is reliable, and therefore this technology is widely used in closely identification and the information exchange field such as public transport paying card, vehicle inspection detection card, identification card.
But owing to the IC-card transponder volume in conventional rfid system is little, non-transformer, electric energy can only obtain from the radio wave that read write line gives off, and though active electronic label is prefixed lithium battery, but the time of use must be the most limited, and the wireless communication power between read write line is the least, identifying that distance is the most limited, in addition, the reason of RFID function limitation also has the following aspects:
1, frequency range is used easily to be disturbed.Currently used power less than 100mw by the frequency range of Wireless Management Committee strict control is not: 13.56MHz, 433MHz, 860-960MHz, 2.45GHz, 5.8GHz, and IC-card most common be use 13.56MHZ, electronic tag mostly uses 2.45GHZ, and therefore rfid system does not the most note running into disturbed environment.Although International Organization for Standardization has formulated ISO14443 and ISO15693 standard exclusively for this at present, carry out strict regulations, but the probability being interfered the most easily has occurred.
2, the mode of data-modulated carrier is the simplest.In wireless communication system, data have to be reflected in which feature of carrier wave, could transmit, the amplitude-shift keying i.e. ASK mode that conventional RFID uses.It is simplest method that this data are reflected in the amplitude variations of carrier wave, although ASK additionally provides the electric energy of discontinuous for transponder chips, but ASK performance is worst, but owing to its demodulation is simple and convenient, and must not oneself working method of using.
3, transfer rate and sensitivity cannot improve the most simultaneously.The message transmission rate of conventional RFID needs the highest, reaches more than 100KBit per second, because both sides identify that distance is the shortest, data exchange must complete within a very short time.But too high transfer rate to take wider transmission passband, and the receiving sensitivity that receiver is when passband is wide is greatly reduced, operating distance will be affected, this is conflict, on the one hand transmission range can not be improved by strengthening transmitting power, on the other hand do not improve again owing to sensitivity is affected by noise, current RFID Sensitirity va1ue is caused to be only between-80dBm to-102dBm, even if it is maximum up to 15dBm (31mw) that active label launches power, but systemic effect distance does not still reach the km order of magnitude.
4, antenna efficiency is low.The distance being mutually distinguishable between read write line and transponder is the most limited, IC-card (passive) identifies distance only 2-10cm, active label identification distance is at about 80 meters, even if using fixed orientation read write line, it has installed the gain directional antenna of band power amplification additional, and it identifies that distance also is difficult to more than 1000 meters.And identification certainty is relevant also whether be in the greatest irradiation of read write line with transponder in the range of, mutual alignment varies slightly, and identification ability is greatly reduced.Therefore identify while conventional RFID is inapplicable in any direction and remote identification, owing to these fatal shortcomings exist, cause its range of application to be greatly limited.
Summary of the invention
For the problems referred to above overcoming conventional RFID identification system to exist, this utility model provides a kind of identification and identifies device at a distance apart from remote, highly sensitive.
The technical scheme is that one of this utility model identifies device at a distance, the information input FFSK modulation/demodulation modules of radio frequency reception, information signal after FFSK modulation/demodulation modules processes inputs CPU, CPU output signal is by FFSK modulation/demodulation modules, PLL FM module, efficient power amplifier module input transmitting-receiving modular converter, and transmitting-receiving modular converter connects antenna.
The read write line information received is inputted FFSK modulation/demodulation modules by highly sensitive receiver module by described transmitting-receiving modular converter.
Described CPU is connected to the memorizer of preset data message.
Being furnished with chargeable lithium cell group and solar energy assisted charging system, solar energy assisted charging system includes solar battery group and power supply management of charging and discharging module, and solar battery group connects lithium battery group input by power supply management of charging and discharging module.
Remote identification device of the present utility model, emphasis changes the wireless communication system that identification condition is the strictest, systematic function is greatly improved, it is effectively improved identification distance, a new height is pushed in RFID application, changes the mode of data modulation, ASK change FFSK into, (Phase Continuation FSK) bandwidth chahnel is narrow, improves anti-interference and anti-error code capacity.Improve receiving sensitivity, can reach more than-120dBm, higher than conventional RFID tens times；Transmitting have employed high efficiency power amplifier technology；System can use isofrequency full-duplex work or single-frequency simplex work both of which；Formulate the new communication protocol of suitable system work, enhance safety and reliability during data transmission；Utilize solar cell to supplement as electric energy, substantially increase the ability that evaluator works continuously.
Accompanying drawing explanation
Fig. 1 is the structural principle block diagram that this utility model identifies device at a distance.
Detailed description of the invention
Remote identification principle of device of the present utility model is as it is shown in figure 1, the signal of radio frequency reception inputs CPU after FFSK modulation /demodulation module recovery.CPU output signal is by FFSK modulation/demodulation modules, PLL FM module, efficient power amplifier module input transmitting-receiving modular converter, and transmitting-receiving modular converter connects antenna, and transmitting-receiving forwards antenna to.CPU is connected to the memorizer of preset data message.This transponder is furnished with chargeable lithium cell group and solar energy assisted charging system, and solar energy assisted charging system includes solar battery group and power supply management of charging and discharging module, and solar battery group connects lithium battery group input by power supply management of charging and discharging module.
Each several part principle is as follows:
FFSK modulation/demodulation modules: Fast Frequency Offset keying, is also Phase Continuation frequency shift keying, and the change of data is reflected in the frequency change of modulated signal, and capacity of resisting disturbance is greatly enhanced, and takies baseband width narrower, and binary decoded characteristic is improved.FFSK is a baseband waveform changer.
PLL FM module: be the frequency generator of a kind of high stability, for determining frequency range and the frequency of wireless communication system, it is possible to flexible configuration.On the frequency required, PLL also serves as high performance frequency modulator.Therefore evaluator flexibly configurable is on different working channels.FFSK signal carries out direct frequency modulation to PLL, selects suitable modulation index, makes frequency modulation performance reach optimal.
High efficiency power amplifier module: using C class or the efficient power amplifier of D class, energy conversion efficiency is high.
Highly sensitive receiver module: owing to being band-limited FM signal, can use high-gain amplitude limit relatively big, obtains high-quality and receives, its sensitivity can close-120dBm, higher tens times than routine.
Transmitting-receiving modular converter: share one pair of antenna, it is provided that receive and the switching launched and protection.
In transponder, use actively powered mode: be furnished with the battery of chargeable lithium, in order to make electric energy supplement in time, add solar energy assisted charging system.
Agreement flow process: read write line is in the cycle of a regulation, about 4 seconds, within the shortest a period of time started, only send the NID of its own system, read write line ID code, function command code and to the confirmation code after the multiple transponder information received in a upper cycle.Transponder, after the Network Recognition receiving read write line and ID code, confirms oneself, in identifying network, further according to the function command code received, to perform relevant operation.When meeting condition, just within remaining time in cycle subsequently, select the time window of oneself by certain rule, upload response message, and receive, at next cycle, the confirmation to oneself that read write line sends.Receive confirmation, show information transmission success, the most no longer respond the same instruction of read write line, need to send unless there are new function command.As can not receive confirmation, then continue selection window and retransmit.Due to the cycle overwhelming majority the uploading for transponder of read write line, therefore system design at most can allow 16 transponders to respond together.Simultaneously by confirming, make transponder remove unnecessary duplicate responses from, improve the capacity of system identification.
The protective measure of data transmission: the most only exchange frame data between read write line and transponder; these frame data are first encrypted for safety; remake 16 CRC checks; and data above is made Error Correction of Coding process (entangling a random error) together with CRC check code division group; remake interleaving treatment before transmission, first deinterleave during reception, error correction, then 16 CRC checks; finally decipher, recover original frame data.Owing to using multiple protection measure; it can have automatic correction capability to the burst error of the certain length that may cause in wireless transmitting system and any bit random error; therefore when there being interference, system remains to safety and precise and works reliably, also effectively increases the distance being mutually distinguishable.
Remote identification device of the present utility model, identify between read write line and transponder distance can reach more than 3000 meters farthest up to ten thousand metres, at this moment the output of active balise is close to or smaller than 10mw, is only the 1/3 of routine RFID active electronic label power.As long as read write line and transponder are in the range of coverage, no matter what relative status both sides are in and can correctly identify.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 use 2PSK(phase-shift keying (PSK) in the specific implementation), PJM(phase hit modulate), GMSK(Gaussian minimum shift keying) etc. various binary modulated modes.Quaternary modulation mode, such as 4FSK, as long as modulator/demodulator does some adjustment, it is possible to adapt to various modulation.Other transceiver part is identical.Agreement and data protective measure are the most generally applicable.
Claims (4)
1. a remote identification device, it is characterized in that: the information input FFSK modulation/demodulation modules of radio frequency reception, information signal after FFSK modulation/demodulation modules processes inputs CPU, CPU output signal is by FFSK modulation/demodulation modules, PLL FM module, efficient power amplifier module input transmitting-receiving modular converter, and transmitting-receiving modular converter connects antenna.
One the most according to claim 1 identifies device at a distance, 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 modular converter.
One the most according to claim 1 identifies device at a distance, it is characterised in that: described CPU is connected to the memorizer of preset data message.
One the most according to claim 1 identifies device at a distance, it is characterized in that: be furnished with chargeable lithium cell group and solar energy assisted charging system, solar energy assisted charging system includes solar battery group and power supply management of charging and discharging module, and solar battery group connects lithium battery group input by power supply management of charging and discharging module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174217.9U CN205490541U (en) | 2016-03-08 | 2016-03-08 | Remote recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620174217.9U CN205490541U (en) | 2016-03-08 | 2016-03-08 | Remote recognition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205490541U true CN205490541U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620174217.9U Expired - Fee Related CN205490541U (en) | 2016-03-08 | 2016-03-08 | Remote recognition device |
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| CN (1) | CN205490541U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680913A (en) * | 2016-03-08 | 2016-06-15 | 李齐营 | Long distance identification apparatus |
| CN109474374A (en) * | 2017-09-08 | 2019-03-15 | 睿鑫科技（天津）有限公司 | A kind of intelligent card data read method, system and device |
-
2016
- 2016-03-08 CN CN201620174217.9U patent/CN205490541U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680913A (en) * | 2016-03-08 | 2016-06-15 | 李齐营 | Long distance identification apparatus |
| CN109474374A (en) * | 2017-09-08 | 2019-03-15 | 睿鑫科技（天津）有限公司 | A kind of intelligent card data read method, system and device |
| CN109474374B (en) * | 2017-09-08 | 2022-03-04 | 睿鑫科技（天津）有限公司 | Smart card data reading method, system and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 |