CN202041964U - Long-distance reader of second generation identification card - Google Patents
Long-distance reader of second generation identification card Download PDFInfo
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- CN202041964U CN202041964U CN2011200554235U CN201120055423U CN202041964U CN 202041964 U CN202041964 U CN 202041964U CN 2011200554235 U CN2011200554235 U CN 2011200554235U CN 201120055423 U CN201120055423 U CN 201120055423U CN 202041964 U CN202041964 U CN 202041964U
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Abstract
The utility model discloses a long-distance reader of the second generation identification card, which comprises a main control unit, a signal processing unit and an antenna which are sequentially communicated. Demodulated signals of the signal processing unit are BSPK digital signals of 847 KHz. By the adoption of the long-distance reader of the second generation identification card, reading information of the second generation identification card within a distance of 80cm can be realized, the problem of application on some special occasions is resolved, and the range of application of the second generation identification card is enlarged.
Description
Technical field
The utility model relates to wireless communication field, relates in particular to a kind of remote reader of second generation I.D..
Background technology
Second generation identity card reader in the market all is a tabletop machine, the distance of read-write second generation I.D. is all within 10cm, existing second generation identity card reader can't be applied to the application scenario that needs long distance read-write second generation I.D., therefore limit the range of application of second generation identity card reader.
The utility model content
The purpose of this utility model is to provide a kind of remote reader that can read and write information in the second generation I.D. in far range.
For achieving the above object, the remote reader of described second generation I.D. comprises main control unit, signal processing unit and the antenna that communication in turn connects; Signal in the described signal processing unit after the demodulation is the BSPK digital signal of 847KHz.
Preferably, described signal processing unit comprises modulation circuit, power amplification circuit, bandwidth-limited circuit and demodulator circuit; Described main control unit is connected with the antenna communication with power amplification circuit through modulation circuit in turn; Described antenna is connected with the main control unit communication with demodulator circuit through bandwidth-limited circuit in turn.
Further, the frequency of carrier signal is 13.56MHz in the described modulation circuit.
Preferably, described signal processing unit comprises radio frequency Card Reader chip, power amplification circuit and bandwidth-limited circuit; Described main control unit is connected with the antenna communication with power amplification circuit through radio frequency Card Reader chip in turn; Described antenna is connected with the communication of radio frequency Card Reader chip through bandwidth-limited circuit.
Further, the frequency of carrier signal is 13.56MHz in the described radio frequency Card Reader chip.
The beneficial effects of the utility model are, use the remote reader of described second generation I.D., can be implemented in the distance range of 80cm the information in the second generation I.D. is read, solve the application problem of some particular application, enlarged the range of application of second generation I.D..
Description of drawings
Fig. 1 shows the system principle block scheme of a kind of embodiment of the present utility model.
Fig. 2 shows the system principle block scheme of another kind of embodiment of the present utility model.
Fig. 3 shows the coupling synoptic diagram of antenna and second generation I.D..
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further.
Fig. 1 shows the system principle block scheme of a kind of embodiment of the present utility model, and the remote reader of described second generation I.D. comprises main control unit 1, signal processing unit and antenna 4 that communication in turn connects.Described signal processing unit comprises modulation circuit 2, power amplification circuit 3, bandwidth-limited circuit 6 and demodulator circuit 7; Described main control unit 1 is connected with antenna 4 communications with power amplification circuit 3 through modulation circuit 2 in turn; Described antenna 4 is connected with main control unit 1 communication with demodulator circuit 7 through bandwidth-limited circuit 6 in turn; The frequency of carrier signal 5 is 13.56MHz in the described modulation circuit 2.
In the present embodiment, main control unit 1 is the control center of described remote reader, described reader is divided into transmission and receives two parts, wherein the sending part branch comprises modulation circuit 2 and power amplification circuit 3, receiving unit comprises bandwidth-limited circuit 6 and demodulator circuit 7, and main control unit 1 and antenna 4 are to send in the described reader and the public part of receiving unit.
The method of work of reader shown in Figure 1 comprises first Activiation method and first communication means of second generation I.D. 10.
Described first Activiation method is that described main control unit 1 through the output of coding back, forms coded signal with second generation I.D. protocol command; Described modulation circuit 2 is modulated the carrier signal 5 of coded signal and 13.56MHz, forms modulation signal; Described modulation signal carries out radio-frequency power by power amplification circuit 3 and amplifies, and radiate by antenna 4.Owing to adopted 3 pairs of radiofrequency signals of power amplification circuit, promptly described modulation signal amplifies, and has designed and can bear powerful antenna 4, so second generation I.D. 10 can be activated in the space away from antenna 4.
Described first communication means is, described antenna 4 receives comprises the signal of No. 10, second generation I.D., undertaken described signal is carried out filtering by bandpass filter, in this stage, bandpass filter has been carried out the amplitude attenuation of 20dB to 13.56MHz carrier signal 5, then the signal of output is delivered to demodulator circuit 7 and carry out demodulation, the BSPK digital signal of output 847KHz, what this BSPK signal outputed to main control unit 1 catches the peripheral hardware pin, the high-low level duration of 1 pair of described BSPK digital signal of main control unit counts, and decode according to the high-low level duration, finish second generation I.D. protocol analysis, and the telecommunication of realization and second generation I.D. 10.
Fig. 2 shows the system principle block scheme of another kind of embodiment of the present utility model, in this embodiment, adopts a kind of radio frequency Card Reader chip 8 to carry out the modulation of radiofrequency signal, has realized the modulation function in the inside of described radio-frequency card chip.Therefore in this embodiment, 1 needs of main control unit carry out processing data information and get final product.
Particularly, in the present embodiment, the remote reader of second generation I.D. comprises main control unit 1, signal processing unit and antenna 4 that communication in turn connects.Described signal processing unit comprises radio frequency Card Reader chip 8, power amplification circuit 3 and bandwidth-limited circuit 6; Described main control unit 1 is connected with antenna 4 communications with power amplification circuit 3 through radio frequency Card Reader chip 8 in turn; Described antenna 4 is connected with 8 communications of radio frequency Card Reader chip through bandwidth-limited circuit 6; The frequency of carrier signal 5 is 13.56MHz in the described radio frequency Card Reader chip 8.
The method of work of reader shown in Figure 2 comprises second Activiation method and the second communication method of second generation I.D. 10.
Described second Activiation method is that main control unit 1 through the output of coding back, forms coded signal with second generation I.D. protocol command; Described coded signal inputs to radio frequency Card Reader chip 8, and radio frequency Card Reader chip 8 is modulated the coded signal and the 13.56MHz carrier signal 5 that receive, and the signal after will modulating then carries out power amplification by power amplification circuit 3, and radiate by antenna 4.Owing to adopted 3 pairs of radio frequencies of power amplification circuit to amplify, and designed and to have born powerful antenna 4, so second generation I.D. 10 can be activated in the space away from antenna 4.
Described second communication method is, described antenna 4 receives comprises the signal of No. 10, second generation I.D., by bandpass filter described signal is carried out filtering, and in this stage, bandpass filter has been carried out the amplitude attenuation of 20dB to 13.56MHz carrier signal 5; Then the signal of output is inputed to radio frequency Card Reader chip 8 and carry out demodulation, radio frequency Card Reader chip 8 output second generation I.D. agreement digital baseband signals, main control unit 1 directly receives this digital baseband signal, finish second generation I.D. protocol analysis, and the telecommunication of realization and second generation I.D. 10.
Fig. 3 is the coupling synoptic diagram of antenna 4 and second generation I.D. 10, among Fig. 3, copper coil 9 is the agent structure of antenna 4, copper coil 9 is realized antenna 4 resonance at the 13.56MHz Frequency point with antenna 4 parameter matching circuit 13, and by antenna 4 feeder lines 12) link to each other with bandpass filter with power amplifier.Antenna 4 radiate high-power RF energy and the second generation I.D. protocol command form with electromagnetic wave 11 by copper coil 9, second generation I.D. 10 is activated in 11 of the electromagnetic waves of antenna 4, and carry out the load-modulate coupling with electromagnetic wave 11 modes and antenna 4 equally, and final the realization communicates with reader.
Being the utility model preferred embodiment only in sum, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should belong to technology category of the present utility model.
Claims (5)
1. the remote reader of a second generation I.D. is characterized in that: comprise main control unit, signal processing unit and antenna that communication in turn connects; Signal in the described signal processing unit after the demodulation is the BSPK digital signal of 847KHz.
2. according to the remote reader of the described second generation I.D. of claim 1, it is characterized in that: described signal processing unit comprises modulation circuit, power amplification circuit, bandwidth-limited circuit and demodulator circuit; Described main control unit is connected with the antenna communication with power amplification circuit through modulation circuit in turn; Described antenna is connected with the main control unit communication with demodulator circuit through bandwidth-limited circuit in turn.
3. according to the remote reader of the described second generation I.D. of claim 2, it is characterized in that: the frequency of carrier signal is 13.56MHz in the modulation circuit.
4. according to the remote reader of the described second generation I.D. of claim 1, it is characterized in that: described signal processing unit comprises radio frequency Card Reader chip, power amplification circuit and bandwidth-limited circuit; Described main control unit is connected with the antenna communication with power amplification circuit through radio frequency Card Reader chip in turn; Described antenna is connected with the communication of radio frequency Card Reader chip through bandwidth-limited circuit.
5. according to the remote reader of the described second generation I.D. of claim 4, it is characterized in that: the frequency of carrier signal is 13.56MHz in the described radio frequency Card Reader chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200554235U CN202041964U (en) | 2011-03-04 | 2011-03-04 | Long-distance reader of second generation identification card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200554235U CN202041964U (en) | 2011-03-04 | 2011-03-04 | Long-distance reader of second generation identification card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202041964U true CN202041964U (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200554235U Expired - Fee Related CN202041964U (en) | 2011-03-04 | 2011-03-04 | Long-distance reader of second generation identification card |
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| CN (1) | CN202041964U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108062495A (en) * | 2017-12-29 | 2018-05-22 | 广东华大互联网股份有限公司 | A kind of system and method that remote RF Card Readers are realized using transmitting-receiving separation |
-
2011
- 2011-03-04 CN CN2011200554235U patent/CN202041964U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108062495A (en) * | 2017-12-29 | 2018-05-22 | 广东华大互联网股份有限公司 | A kind of system and method that remote RF Card Readers are realized using transmitting-receiving separation |
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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 |
Granted publication date: 20111116 Termination date: 20170304 |
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| CF01 | Termination of patent right due to non-payment of annual fee |