CN201111095Y - UHF radio frequency recognizing read-write machine - Google Patents
UHF radio frequency recognizing read-write machine Download PDFInfo
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- CN201111095Y CN201111095Y CNU2007200567489U CN200720056748U CN201111095Y CN 201111095 Y CN201111095 Y CN 201111095Y CN U2007200567489 U CNU2007200567489 U CN U2007200567489U CN 200720056748 U CN200720056748 U CN 200720056748U CN 201111095 Y CN201111095 Y CN 201111095Y
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Abstract
The utility model discloses a UHF RF identification reader-writer which can have long distance wireless communication with a passive power RF identification tag which operates in the UHF frequent range of (860MHz to 960MHz). The utility model discloses a UHF RF identification reader-writer structure which comprises a RF interface module and a base band processing module; the RF interface module adopts a zero-IF circuit structure to replace the super heterodyne mixing circuit in the prior art so that the stability of the system is improved; the base band processing module adopts a dynamically reconfigurable analog signal processor (DRASP) as the base band signal modulation platform of the reader-writer and adopts a field programmable analog array (FPAA) as the base band signal demodulation platform of the reader-writer so that the circuit design is simplified and the cost of the reader-writer is reduced. The electronic tag identifier has the advantages of simple structure and stable performance and is applicable to the requirements of different application situations such as the portable type and the base station type.
Description
Technical field
The utility model relates to the read write line of a kind of UHF (Ultra High Frequency ultrahigh frequency) electronic label identification, can carry out wireless remote data communication with the passive RFID that is operated in the 840-960MHz frequency range (abbreviation of Radio FrequencyIdentification, i.e. radio-frequency (RF) identification) label.
Background technology
REID is to utilize wireless radio frequency mode and electronic tag to carry out the noncontact two-way communication, to reach the automatic identification technology of identifying purpose and swap data.
The UHF radio-frequency identification reader/writer is used for the RFID label is carried out the Card read/write operation, the UHF radio-frequency identification reader/writer is modulated to armed baseband signal on the carrier wave, send to the RFID label, the unmodulated carrier wave of emission is modulated the carrier wave that needs in order to energy and tag reflection that the label continuous firing is provided continuously then.The RFID label obtains energy from the carrier wave of UHF radio-frequency identification reader/writer, according to the read write line command content that receives, the return message reflection modulation of RFID label is loaded on the continuous carrier of read write line.The UHF radio-frequency identification reader/writer identifies the return signal of label from continuous carrier.
Yet existing UHF radio-frequency identification reader/writer integrated level is lower, and structure is complicated, and cost is higher.
The utility model content
The purpose of this utility model is, provides a kind of novel UHF radio-frequency identification reader/writer at the defective of prior art.
The purpose of this utility model is achieved through the following technical solutions:
A kind of UHF radio-frequency identification reader/writer, comprise RFID label and rfid interrogator, rfid interrogator comprises antenna, RF interface module and baseband processing module, it is characterized in that, described baseband processing module comprises single-chip microcomputer and the separate base band sending module and the base band receiver module that are connected with single-chip microcomputer, described RF interface module comprises separate RF sending module and RF receiver module, the RF sending module is connected with the base band sending module, the RF receiver module is connected with the base band receiver module, and RF sending module and RF receiver module are connected on the antenna of read write line by circulator, base band sending module control RF sending module produces radiofrequency signal and offers the RFID label, and the base band receiver module transmits the label signal of returning with the RF receiver module and decodes.
Described base band sending module cooperates single chip computer AT mega128L to realize by AN231E04, AT25040A and low-pass filter LPF.
Described base band receiver module cooperates single chip computer AT mega128L to realize that the AN238K04 chip is made up of two AN238E04 and an AN238C04 by AN238K04.
The device that uses in the described RF transmitter module comprises: radio-frequency modulator LT5568, bandpass filter B4637, amplifier MAR-3 and MAV11SM, AGC system, power amplifier AH312, and circulator chip HY902-928B, wherein, the AGC system is made up of AGC modules A V105-12, AGC module LTC5505-1, AGC module LRDC-20-2; Radio-frequency modulator LT5568 produces RFID and transmits, through bandpass filter B4637 filtering, carry out the two-stage amplification through amplifier MAR-3 and MAV11SM then, import the AGC system again, transmit through after the control of AGC system, output to power amplifier AH312 and carry out the final stage amplification, enter circulator chip HY902-928B at last, output on the antenna again.
The device that described RF receiver module uses comprises: the amplification module that circulator chip HY902-928B, bandpass filter B4637, LNA MAR-3 and amplifier MAV 11SM form, VGA system, back segment amplification module, and RF detuner LT5516, wherein, the VGA system is by the VGA chip MAX2056 of MAXIM company, and power detector MAX2015 and operational amplifier MAX4231 form; Received signal enters circulator chip HY902-928B from antenna, through bandpass filter B4637 filtering, amplification module through LNA MAR-3 and amplifier MAV 11SM composition amplifies again, enter the VGA system again, after received signal is controlled through the VGA system, amplify through the back segment amplification module again, and output to RF detuner LT5516 and carry out the direct demodulation of zero intermediate frequency.
The utility model remarkable result compared with prior art: the circuit level height of UHF radio-frequency identification reader/writer of the present utility model, simple in structure, stable performance can adapt to the needs from portable to the various different application occasions of base station formula.
Description of drawings
Fig. 1 is the structural representation of base band control module in the UHF radio-frequency identification reader/writer of the present utility model;
Fig. 2 is the structural representation of base band sending module in the UHF radio-frequency identification reader/writer of the present utility model;
Fig. 3 is the structural representation of base band receiver module in the UHF radio-frequency identification reader/writer of the present utility model;
Fig. 4 is the structural representation of radiofrequency emitting module in the UHF radio-frequency identification reader/writer of the present utility model;
Fig. 5 is the structural representation of Receiver Module in the UHF radio-frequency identification reader/writer of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail:
As shown in Figure 1, the baseband processing module of the UHF radio-frequency identification reader/writer that present embodiment provides comprises following device: the ATmega128L single-chip microcomputer of atmel corp, the dynamic configurable analogue signal processor of Anadigm company (DSASP:Dynamically Reconfigurable Analog Signal Processor) AN231E04, the AT25040A of atmel corp, low-pass filter LPF, the AN238K04 of Anadigm company, wherein AN238K04 is made up of two field programmable analog array (FPAA:FieldProgrammable Analog Array) AN238E04 and RFID state machine (State Machine) AN238C04.Above-mentioned each device is formed base band sending module shown in Figure 2 and two submodules of base band receiver module shown in Figure 3, is elaborated respectively below.
As shown in Figures 1 and 2, the base band sending module in the baseband processing module cooperates single chip computer AT mega128L to realize by AN231E04, AT25040A and low-pass filter LPF.The RFID instruction that ATmega128L will send is carried out sending digital signal to AN231E04 after the information source coding according to standard code, is converted to analog baseband signal after AN231E04 amplifies this digital signal filter and sends to modulator then.AN231E04 can finish adjustment, filtering, amplification, the rectification to signal, operation such as sue for peace, subtract each other, multiply each other, can carry out the visualized graphs configuration to it by design tool AnadigmDesigner, download in the objective chip by the SPI mode then, AN231E04 is configured to smoothing filter by the operational amplifier with chip internal I/O mouth, can realize digital signal is converted to the output of simulating signal difference.AT25040A is SPI mode EEPROM, and when the rfid interrogator offline operation, it can be used for the AN231E04 internal register is configured.
As shown in Figure 3, the base band receiver module in the baseband processing module has adopted field programmable analog array (FPAA:Field Programmable Analog Array) technology, cooperates single chip computer AT mega128L to realize by AN238K04.The AN238K04 chip is supported EPC Global Class1 Gen1﹠amp; Gen2 and IS018000-6 standard, form by two AN238E04 and an AN238C04, AN238C04 wherein is the state machine that AN238E04 is configured, and AN23 8E04 is Field Programmable AnalogArrays (FPAAs), AN238E04 mainly finishes low-pass filtering, is functions such as digital signal with analog signal conversion.After AN238K04 received base-band analog signal from detuner, portion carried out low-pass filtering and provides numeral and Analog Baseband output within it, selects digital baseband signal output and this is transferred to single-chip microcomputer.Adopt 2 AN238E04 can handle the two-way baseband signal of exporting by i/q demodulator respectively, use I/Q quadrature demodulation method during reception, each road needs an AN238E04, and these two AN238E04 can be configured by an AN238C04, and the PE2 of single chip computer AT mega128L and PE3 receive the I/Q two ways of digital signals.
As shown in Figure 4, RF sending module in the UHF radio-frequency identification reader/writer that present embodiment provides comprises following device: the radio-frequency modulator LT5568 of Linear company, the bandpass filter B4637 of EPCOS company, the amplifier MAR-3 of Mini-Circuits company and MAV11SM (in the Gain Block system in the drawings), the AGC system, the AGC system is (by the AGC modules A V105-12 of Skyworks company, the AGC module LTC5505-1 of Linear company, the AGC module LRDC-20-2 of Mini-Circuits company forms), the circulator chip HY902-928B of the power amplifier AH312 of WJ Communications company and Shenzhen Hua Yang company.Among Fig. 4 between the devices at different levels the parameter of institute's absolute altitude be power through transmitting behind the chips at different levels.
Above-mentioned RF sending module adopts the mode of directly modulation to produce the local oscillation signal and the carrier signal of rfid system.Wherein, radio-frequency modulator LT5568 produces RFID and transmits, through bandpass filter B4637 filtering, pass through Gain Block system (the amplifier MAR-3 and the MAV11SM that comprise Mini-Circuits company) then and carry out the two-stage amplification, import the AGC system again, transmit, output to power amplifier AH312 and carry out the final stage amplification through after the control of AGC system, enter circulator chip HY902-928B at last, output on the antenna again.
As shown in Figure 5, RF receiver module in the UHF radio-frequency identification reader/writer that present embodiment provides comprises following device: the circulator chip HY902-928B of Shenzhen Hua Yang company, the bandpass filter B4637 of EPCOS company, the amplification module (being denoted as Amplifier among Fig. 5) that the LNA MAR-3 of Mini-Circuits company and amplifier MAV 11SM form, (the VGA system is by the VGA chip MAX2056 of MAXIM company in the VGA system, power detector MAX2015 and operational amplifier MAX4231 form), the back segment amplification module, and the RF detuner LT5516 of Linear company, wherein RF receiver module and the shared circulator chip of RF sending module HY902-928B shown in Figure 4.Among Fig. 5 between the devices at different levels the parameter of institute's absolute altitude be power through received signal behind the chips at different levels.
Above-mentioned RF receiver module adopts zero intermediate frequency receiving circuit structure, and direct conversion produces I/Q two-way baseband signal.Received signal enters circulator chip HY902-928B from antenna, through bandpass filter B4637 filtering, amplification module through LNA MAR-3 and amplifier MAV 11SM composition amplifies again, enter the VGA system again, after received signal is controlled through the VGA system, again through amplifying, and output to RF detuner LT5516 and carry out the direct demodulation of zero intermediate frequency.
The super high frequency electronic label recognizer that present embodiment provides also comprises power circuit and indicator light circuit, and power circuit is each device power supply in the recognizer, and display circuit is connected with single-chip microcomputer, shows the information processing result of single-chip microcomputer.This super high frequency electronic label recognizer in use can be by RS232 and computing machine communication.
Claims (6)
1. UHF radio-frequency identification reader/writer, it is characterized in that, comprise antenna, RF interface module and baseband processing module, described baseband processing module comprises single-chip microcomputer and the separate base band sending module and the base band receiver module that are connected with single-chip microcomputer, described RF interface module comprises separate RF sending module and RF receiver module, the RF sending module is connected with the base band sending module, the RF receiver module is connected with the base band receiver module, and RF sending module and RF receiver module are connected on the antenna of read write line by circulator, base band sending module control RF sending module produces radiofrequency signal and offers the RFID label, and the base band receiver module transmits the label signal of returning with the RF receiver module and decodes.
2. UHF radio-frequency identification reader/writer according to claim 1 is characterized in that, described base band sending module cooperates single chip computer AT mega128L to realize by AN231E04, AT25040A and low-pass filter LPF.
3. super high frequency electronic label recognizer according to claim 1 is characterized in that, described base band receiver module cooperates single chip computer AT mega128L to realize that the AN238K04 chip is made up of two AN238E04 and an AN238C04 by AN238K04.
4. UHF radio-frequency identification reader/writer according to claim 1, it is characterized in that, the device that uses in the described RF transmitter module comprises: radio-frequency modulator LT5568, bandpass filter B4637, amplifier MAR-3 and MAV11SM, AGC system, power amplifier AH312, and circulator chip HY902-928B, wherein, the AGC system is made up of AGC modules A V105-12, AGC module LTC5505-1, AGC module LRDC-20-2; Radio-frequency modulator LT5568 produces RFID and transmits, through bandpass filter B4637 filtering, carry out the two-stage amplification through amplifier MAR-3 and MAV11SM then, import the AGC system again, transmit through after the control of AGC system, output to power amplifier AH312 and carry out the final stage amplification, enter circulator chip HY902-928B at last, output on the antenna again.
5. UHF radio-frequency identification reader/writer according to claim 1, it is characterized in that, the device that described RF receiver module uses comprises: the amplification module that circulator chip HY902-928B, bandpass filter B4637, LNA MAR-3 and amplifier MAV11SM form, VGA system, back segment amplification module, and RF detuner LT5516, wherein, the VGA system is by the VGA chip MAX2056 of MAXIM company, and power detector MAX2015 and operational amplifier MAX4231 form; Received signal enters circulator chip HY902-928B from antenna, through bandpass filter B4637 filtering, amplification module through LNA MAR-3 and amplifier MAV11SM composition amplifies again, enter the VGA system again, after received signal is controlled through the VGA system, amplify through the back segment amplification module again, and output to RF detuner LT5516 and carry out the direct demodulation of zero intermediate frequency.
6. UHF radio-frequency identification reader/writer according to claim 1 is characterized in that, also comprises power circuit and indicator light circuit, and power circuit is each device power supply in the recognizer, and display circuit is connected with single-chip microcomputer, shows the information processing result of single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200567489U CN201111095Y (en) | 2007-09-10 | 2007-09-10 | UHF radio frequency recognizing read-write machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200567489U CN201111095Y (en) | 2007-09-10 | 2007-09-10 | UHF radio frequency recognizing read-write machine |
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| CN201111095Y true CN201111095Y (en) | 2008-09-03 |
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| CNU2007200567489U Expired - Fee Related CN201111095Y (en) | 2007-09-10 | 2007-09-10 | UHF radio frequency recognizing read-write machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388082B (en) * | 2007-09-10 | 2010-10-13 | 广东科学技术职业学院 | Super high frequency electronic label recognizer |
| CN101894281A (en) * | 2010-06-18 | 2010-11-24 | 山东大学 | Baseband signal processing SOC chip of multi-protocol UHF RFID reader |
| CN103729668A (en) * | 2014-01-14 | 2014-04-16 | 北京工业大学 | Multi-interface protocol communication supported ultrahigh frequency RFID (Radio Frequency Identification) reader-writer |
| CN109102700A (en) * | 2018-09-28 | 2018-12-28 | 天津中兴智联科技有限公司 | A kind of biradical reader Vehicle License Plate Recognition System |
-
2007
- 2007-09-10 CN CNU2007200567489U patent/CN201111095Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101388082B (en) * | 2007-09-10 | 2010-10-13 | 广东科学技术职业学院 | Super high frequency electronic label recognizer |
| CN101894281A (en) * | 2010-06-18 | 2010-11-24 | 山东大学 | Baseband signal processing SOC chip of multi-protocol UHF RFID reader |
| CN101894281B (en) * | 2010-06-18 | 2012-10-17 | 山东大学 | Baseband signal processing SOC chip of multi-protocol UHF RFID reader |
| CN103729668A (en) * | 2014-01-14 | 2014-04-16 | 北京工业大学 | Multi-interface protocol communication supported ultrahigh frequency RFID (Radio Frequency Identification) reader-writer |
| CN109102700A (en) * | 2018-09-28 | 2018-12-28 | 天津中兴智联科技有限公司 | A kind of biradical reader Vehicle License Plate Recognition System |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080903 Termination date: 20150910 |
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| EXPY | Termination of patent right or utility model |