CN203217596U - Passive all-frequency RFID reader/writer - Google Patents
Passive all-frequency RFID reader/writer Download PDFInfo
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- CN203217596U CN203217596U CN 201320139052 CN201320139052U CN203217596U CN 203217596 U CN203217596 U CN 203217596U CN 201320139052 CN201320139052 CN 201320139052 CN 201320139052 U CN201320139052 U CN 201320139052U CN 203217596 U CN203217596 U CN 203217596U
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Abstract
The utility model discloses a passive all-frequency RFID reader/writer. The passive all-frequency RFID reader/writer comprises an ultrahigh-frequency read-write chip, a high-frequency read-write chip, a low-frequency read-write chip, an ultrahigh-frequency antenna, a high-frequency antenna and a low-frequency antenna; and the ultrahigh-frequency antenna, the high-frequency antenna and the low-frequency antenna are respectively connected with the chips. The passive all-frequency RFID reader/writer designed in the utility model solves problems that a plurality of car readers having different frequencies are complicated to use and generate antenna interference.
Description
Technical field
The utility model belongs to field of radio frequency identification, is specifically related to a kind of RFID full range read write line.
Background technology
REID is a kind of wireless recognition technique that the 90's of 20th century begins to rise, be one and utilize radiofrequency signal to realize that by the space coupling contactless information transmission and the information of passing through to transmit reach the technology of identifying purpose, can identify the static object with mobile.Identification work need not manual intervention, can work in various rugged surroundings.The RFID technology can be identified high-speed moving object and can identify a plurality of labels simultaneously, and is swift and convenient to operate.Radio-frequency (RF) identification is divided into low frequency, high frequency, ultrahigh frequency, microwave by the difference of applying frequency, and corresponding representative frequency is respectively: low frequency 135KHz is following, high frequency 13.56MHz, ultrahigh frequency 860M-960MHz, microwave 2.4GHz, 5.8GHz.Ultrahigh frequency (UHF) and high frequency (HF) and low frequency (LF's) is most widely used at present.Along with developing rapidly of new round information industry, some enterprises and factory have proposed the application demand to ultrahigh frequency electronic tag on the basis of original low frequency and frequency applications, so just caused desktop hair fastener link to have the situation of two even three read write lines to produce, and because the antenna of different frequency range exerts an influence to the effect of Card Reader, therefore being necessary to propose a kind of new technical scheme solves this problem.
The utility model content
Use antenna interference problem loaded down with trivial details and that produce for the card reader that solves a plurality of different frequency ranges, the utility model has designed a kind of passive full range rfid interrogator.
The technical scheme that the utility model addresses the above problem is: a kind of passive full range rfid interrogator, comprise the ultrahigh frequency read-write chip, high frequency read-write chip and the low frequency read-write chip that are connected with microprocessor, and the ultra-high frequency antenna, high frequency antenna and the low-frequency antenna that are connected respectively with described chip.Its advantage is: the work that microprocessor is responsible for each peripheral hardware of Coordination Treatment with communicate by letter the read-write cell of UHF ultrahigh frequency circuit and the paired ISO18000-6C/A/B electronic tag of ultra-high frequency antenna circuit bank.The read-write cell of HF high-frequency circuit and the paired ISO14443 typeA of high frequency antenna circuit bank card.The read-write cell of LF low-frequency channel and the paired ID card of low-frequency antenna circuit bank.Make the card reader antenna time division multiplex of full rate, turn-off the radio-frequency receiving-transmitting of other two antennas in the time of one of them antenna work, because the speed of switching is the ms level, whole effect can think that both carry out simultaneously.
Described passive full range rfid interrogator, microprocessor are connected with draws together hummer and LED light.Its advantage is: when RFID radio-frequency card and read write line coupling, hummer and LED indicating circuit prompting user radio-frequency card read success.Microprocessor is controlled the duty of hummer by the base stage of the triode in the IO pin control buzzer circuit.The LED indicating circuit is then directly controlled by the IO pin of microprocessor.
Described passive full range rfid interrogator, microprocessor is connected with ethernet communication circuit, RS485 telecommunication circuit and usb communication circuit.Its advantage is that the read write line of these three kinds of communication mode coexistences can satisfy most communications applications demands.Ethernet circuit can access to LAN by netting twine or the internet carry out the exchange of data.USB can directly link to each other with PC with the RS485 telecommunication circuit and finish the instructions of PC issue.Wherein ethernet circuit adopts DM9000AEP as ethernet control chip, and this chip is connected with microprocessor by the parallel interface of standard, is undertaken interconnected by network transformer and exterior PC, route or other network equipments.The RS485 circuit adopts communicating by letter between the realization of SP485 chip and outside and the microprocessor.USB DEVICE of the present utility model is integrated to form complete usb communication circuit with microprocessor internal by the DP pin pull-up circuit of 27 outside even build-out resistors and USB.
Described passive full range rfid interrogator, the ultrahigh frequency read-write chip is integrated with crystal oscillating circuit.Its advantage is: the outside capacitance-resistance match circuit that the chip internal voltage controlled oscillator mates, and capacitor decoupling circuit.
Described passive full range rfid interrogator, ultra-high frequency antenna mainly, band pass filter circuit subelement single by LC matching network subelement, carrier wave combiner circuit subelement, transmission and reception coupler circuit constitute.Its advantage is: after ultra-high frequency signal amplifies through the integrated chip inner modulation, being coupled to bandpass filter through the transmission coupler circuit then by the LC matching network launches by antenna afterwards, after receiving effective signal, sends electronic tag the radio-frequency response signal, process reception coupler circuit was received then by chip and amplifies and demodulation at this chip internal after this signal received by antenna, realized the read-write operation to electronic tag.
Described passive full range rfid interrogator, high frequency antenna are mainly by sending the LC match circuit, accepting the RC match circuit and aerial coil is formed.Its advantage is: the signal of read-write card sends to matching network through after the internal debugging by TX1 and TX2, be capacitively coupled to aerial coil afterwards and send to Card-terminal, card receives after the active data, send reply data and receive by aerial coil and enter through the RC match circuit then that chip amplifies and demodulation, realize meeting the read-write operation of ISO14443 typeA card.
Described passive full range rfid interrogator, low frequency read-write chip and low-frequency antenna comprise antenna receiving-sending circuit and signal demodulating circuit, the mode that the antenna receiving-sending circuit adopts three triodes to recommend output realizes carrier transmit.Its advantage is: low frequency Card Reader circuit is made up of antenna receiving-sending circuit and signal demodulating circuit, the mode that adopts three triodes to recommend output realizes the antenna circuit for carrier transmit, when the low frequency card is back launched the emission that modulation signal is realized the label card number by after antenna energy activated by this carrier wave.The low frequency signal demodulator circuit removes by the carrier wave of low-pass filter network with 125K earlier, amplifies chip LM358 by signal then the IO pin that last this signal of modulation signal amplification outputs to microprocessor is realized reading of card number.
The full range read write line that high integration ultrahigh frequency read-write chip high frequency read-write chip of the present utility model and low frequency read-write chip are formed, the label of full frequency band different agreement and the read-write of radio-frequency card have been realized, the high integration radio frequency chip and the microprocessor that use, overcome the big shortcoming of the big power consumption of traditional card reader volume, realized miniaturization and low-power consumption.Card reader is integrated three kinds of frequency ranges and the label of various protocols and the read-write capability of radio-frequency card.By coordination and the optimization of software and hardware design, the distance that makes the read write tag of two kinds of frequency ranges wherein and card is 2CM～5CM within desirable scope all.Before not being optimized, simply that multiple frequency range stack is practical Card Reader distance in 5CM, through optimization and handle after the distance of ultrahigh frequency read write tag of the present utility model and card be increased to about 15CM.
Description of drawings
Fig. 1 is the utility model functional block diagram;
Fig. 2 is the operating circuit of the utility model ultrahigh frequency read-write chip;
Fig. 3 is the utility model ultra-high frequency antenna circuit;
Fig. 4 is the operating circuit of the utility model high frequency read-write chip;
Fig. 5 is the utility model high frequency antenna circuit;
Fig. 6 is the utility model low frequency signal demodulator circuit;
Fig. 7 is the utility model low-frequency antenna circuit;
Fig. 8 is the utility model ethernet communication circuit;
Fig. 9 is the utility model RS485 telecommunication circuit;
Figure 10 is the utility model usb communication circuit;
Figure 11 is the utility model LED and buzzer circuit.
Embodiment
Below in conjunction with accompanying drawing structure of the present utility model is explained in detail explanation, a kind of passive full range rfid interrogator, comprise the ultrahigh frequency read-write chip, high frequency read-write chip and the low frequency read-write chip that are connected with microprocessor, and the ultra-high frequency antenna, high frequency antenna and the low-frequency antenna that are connected respectively with described chip.Be the utility model functional block diagram as Fig. 1; Microprocessor is connected with draws together hummer and LED light.Microprocessor is connected with ethernet communication circuit, RS485 telecommunication circuit and usb communication circuit.The ultrahigh frequency read-write chip is integrated with crystal oscillating circuit.Ultra-high frequency antenna mainly, band pass filter circuit subelement single by LC matching network subelement, carrier wave combiner circuit subelement, transmission and reception coupler circuit constitutes.High frequency antenna is mainly by sending the LC match circuit, accepting the RC match circuit and aerial coil is formed.
The read-write cell of UHF ultrahigh frequency circuit and the paired ISO18000-6C/A/B electronic tag of ultra-high frequency antenna circuit bank.The read-write cell of HF high-frequency circuit and the paired ISO14443 typeA of high frequency antenna circuit bank card.LF low-frequency channel and low-frequency antenna circuit bank meet the 125K low-frequency ID card of Manchester's cde in pairs.
Ultrahigh frequency Card Reader chip core partly adopts Austrian microelectronic high integration rf chip AS3992, this chip is embedded meet the agreement (ISO18000-6C) of EPC Class1 Gen2 and in the direct read pattern of chip with the cooperation of microprocessor under can realize the electronic tag that meets ISO18000-6A/B is read and write.This ultrahigh frequency circuit also has crystal oscillating circuit, the outside capacitance-resistance match circuit that the chip internal voltage controlled oscillator mates, and capacitor decoupling circuit except integrated RF transceiving chip AS3992.Be the operating circuit of the utility model ultrahigh frequency read-write chip as Fig. 2; The ultra-high frequency antenna part is mainly by LC matching network subelement, carrier wave combiner circuit subelement, transmission and single, the band pass filter circuit subelement of reception coupler circuit.Be the utility model ultra-high frequency antenna circuit as Fig. 3; After ultra-high frequency signal amplifies through AS3992 integrated chip inner modulation, being coupled to bandpass filter through the transmission coupler circuit then by the LC matching network launches by antenna afterwards, after receiving effective signal, sends electronic tag the radio-frequency response signal, amplified and demodulation at this chip internal then by the reception of AS3992 chip through receiving coupler circuit after this signal receives by antenna, realize the read-write operation to electronic tag.
High frequency Card Reader chip adopts the integrated digital-to-analogue hybrid chip of the microelectronic FM1702 of Fudan University, and this chip is supported ISO14443 typeA agreement, and interior band ciphering unit can satisfy the encryption requirements in the small amount payment, and chip integration becomes the modulation module of signal.Be the operating circuit of the utility model high frequency read-write chip as Fig. 4; This integral unit only needs power supply coupling capacitor and crystal oscillating circuit can move work.High frequency antenna mainly by, send the LC coupling and accept the RC match circuit and aerial coil is formed, be the utility model high frequency antenna circuit as Fig. 5; The signal of read-write card is through sending to matching network by TX1 and TX2 after the FM1702 internal debugging, be capacitively coupled to aerial coil afterwards and send to Card-terminal, card receives after the active data, send reply data and receive by aerial coil and enter the FM1702 chip through the RC match circuit then and amplify and demodulation, realize meeting the read-write operation of ISO14443 typeA card.
Low frequency Card Reader circuit is made up of antenna receiving-sending circuit and signal demodulating circuit, realize antenna circuit for carrier transmit as Fig. 7 for the mode that adopts three triodes to recommend output, when the low frequency card is back launched the emission that modulation signal is realized the label card number by after antenna energy activated by this carrier wave.Be the low frequency signal demodulator circuit as Fig. 6, this circuit removes by the carrier wave of low-pass filter network with 125K earlier, amplifies chip LM358 by signal then and modulation signal is amplified the IO pin that last this signal outputs to microprocessor realizes reading of card number.
Ethernet circuit adopts DM9000AEP as ethernet control chip, and this chip is connected with microprocessor by the parallel interface of standard, is undertaken interconnected by network transformer and exterior PC, route or other network equipments.Be the utility model ethernet communication circuit as Fig. 8;
The RS485 circuit adopts communicating by letter between the realization of SP485 chip and outside and the microprocessor.Be the utility model RS485 telecommunication circuit as Fig. 9; USB DEVICE of the present utility model is integrated to form complete usb communication circuit with microprocessor internal by the DP pin pull-up circuit of 27 outside even build-out resistors and USB.Be the utility model usb communication circuit as Figure 10;
Microprocessor is controlled the duty of hummer by the base stage of the triode in the IO pin control buzzer circuit.The LED indicating circuit is then directly controlled by the IO pin of microprocessor.Be the utility model LED and buzzer circuit as Figure 11.
Because unavoidable effect to Card Reader exerts an influence among the card reader that the antenna of different frequency range is integrated and small, the utility model uses the card reader antenna time division multiplex of full rate, in the time of one of them antenna work, turn-off the radio-frequency receiving-transmitting of two antennas in addition, because the speed of switching is the ms level, so whole effect can think that basically both carry out simultaneously.
Technique scheme has only embodied the optimal technical scheme of technical solutions of the utility model; those skilled in the art to some part wherein some changes that may make all embodied principle of the present utility model, belong within the protection domain of the present utility model.
Claims (7)
1. passive full range rfid interrogator, it is characterized in that, described read write line comprises ultrahigh frequency read-write chip, high frequency read-write chip and the low frequency read-write chip that is connected with microprocessor, and the ultra-high frequency antenna, high frequency antenna and the low-frequency antenna that are connected with described chip respectively.
2. passive full range rfid interrogator according to claim 1 is characterized in that, microprocessor is connected with draws together hummer and LED light.
3. passive full range rfid interrogator according to claim 1 is characterized in that, microprocessor is connected with ethernet communication circuit, RS485 telecommunication circuit and usb communication circuit.
4. passive full range rfid interrogator according to claim 1 is characterized in that the ultrahigh frequency read-write chip is integrated with crystal oscillating circuit.
5. passive full range rfid interrogator according to claim 1 is characterized in that, ultra-high frequency antenna mainly is made of LC matching network subelement, carrier wave combiner circuit subelement, transmission and reception coupler circuit subelement, band pass filter circuit subelement.
6. passive full range rfid interrogator according to claim 1 is characterized in that, high frequency antenna is mainly by sending the LC match circuit, accepting the RC match circuit and aerial coil is formed.
7. passive full range rfid interrogator according to claim 1 is characterized in that low frequency read-write chip and low-frequency antenna comprise antenna receiving-sending circuit and signal demodulating circuit, and the mode that the antenna receiving-sending circuit adopts three triodes to recommend output realizes carrier transmit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320139052 CN203217596U (en) | 2013-03-26 | 2013-03-26 | Passive all-frequency RFID reader/writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320139052 CN203217596U (en) | 2013-03-26 | 2013-03-26 | Passive all-frequency RFID reader/writer |
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| CN203217596U true CN203217596U (en) | 2013-09-25 |
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| CN 201320139052 Expired - Fee Related CN203217596U (en) | 2013-03-26 | 2013-03-26 | Passive all-frequency RFID reader/writer |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104036224A (en) * | 2014-06-27 | 2014-09-10 | 成都联星微电子有限公司 | Multi-mode mobile identity authentication system and method based on RFID |
| CN106529360A (en) * | 2016-11-01 | 2017-03-22 | 公安部第三研究所 | Radio frequency read-write device |
| CN107679430A (en) * | 2017-08-18 | 2018-02-09 | 宁波腾智信息技术有限公司 | A kind of control circuit for RFID intelligent read equipment |
| CN107679589A (en) * | 2017-08-18 | 2018-02-09 | 宁波腾智信息技术有限公司 | A kind of device and method for RFID intelligent reads |
| CN107832811A (en) * | 2017-10-31 | 2018-03-23 | 公安部第三研究所 | The high-power read write line of low frequency global function for radio frequency identification |
| CN110781695A (en) * | 2018-07-30 | 2020-02-11 | 南京溯源信息技术有限公司 | Implementation method of high-frequency reader-writer with address code |
| CN111000629A (en) * | 2019-12-05 | 2020-04-14 | 武汉奇致激光技术股份有限公司 | Safety authentication device for laser therapy apparatus and control method |
| CN114389647A (en) * | 2022-01-21 | 2022-04-22 | 维沃移动通信有限公司 | Electronic device |
-
2013
- 2013-03-26 CN CN 201320139052 patent/CN203217596U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104036224A (en) * | 2014-06-27 | 2014-09-10 | 成都联星微电子有限公司 | Multi-mode mobile identity authentication system and method based on RFID |
| CN106529360A (en) * | 2016-11-01 | 2017-03-22 | 公安部第三研究所 | Radio frequency read-write device |
| CN107679430A (en) * | 2017-08-18 | 2018-02-09 | 宁波腾智信息技术有限公司 | A kind of control circuit for RFID intelligent read equipment |
| CN107679589A (en) * | 2017-08-18 | 2018-02-09 | 宁波腾智信息技术有限公司 | A kind of device and method for RFID intelligent reads |
| CN107679589B (en) * | 2017-08-18 | 2020-06-30 | 宁波腾智信息技术有限公司 | Device and method for intelligent RFID reading and writing |
| CN107832811A (en) * | 2017-10-31 | 2018-03-23 | 公安部第三研究所 | The high-power read write line of low frequency global function for radio frequency identification |
| CN110781695A (en) * | 2018-07-30 | 2020-02-11 | 南京溯源信息技术有限公司 | Implementation method of high-frequency reader-writer with address code |
| CN111000629A (en) * | 2019-12-05 | 2020-04-14 | 武汉奇致激光技术股份有限公司 | Safety authentication device for laser therapy apparatus and control method |
| CN114389647A (en) * | 2022-01-21 | 2022-04-22 | 维沃移动通信有限公司 | Electronic device |
| CN114389647B (en) * | 2022-01-21 | 2023-11-24 | 维沃移动通信有限公司 | Electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG PURUIDA IOT TECHNOLOGY CO., LTD. Free format text: FORMER NAME: NINGBO PURFID IOT TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 315141, Zhejiang, Ningbo hi tech Zone R & D Park, Lane 999, Lane B7, building 3, east side Patentee after: Zhejiang Purui of IOT Technology Co. Ltd. Address before: 315141 Zhejiang city of Ningbo province high tech Zone Jinghua Road No. 188 Building 2 building 503 Ming Yonggang modern room Patentee before: Ningbo Purfid Iot Technology Co.,Ltd. |
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| 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: 20130925 Termination date: 20170326 |