CN202422159U - RFID tag reader-writer - Google Patents
RFID tag reader-writer Download PDFInfo
- Publication number
- CN202422159U CN202422159U CN2011204377422U CN201120437742U CN202422159U CN 202422159 U CN202422159 U CN 202422159U CN 2011204377422 U CN2011204377422 U CN 2011204377422U CN 201120437742 U CN201120437742 U CN 201120437742U CN 202422159 U CN202422159 U CN 202422159U
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Abstract
The utility model discloses a RFID (Radio Frequency Identification Device) tag reader-writer which comprises an antenna, an induction circuit, an amplifying circuit, a resonance circuit, a modulation/demodulation circuit, a controller and an oscillation signal generator, wherein the induction circuit is connected in series to the antenna; the amplifying circuit is connected in series to the induction circuit; the resonance circuit is connected in series to the antenna; the modulation/demodulation circuit is connected in series to the resonance circuit; the controller is connected with the amplifying circuit and the modulation/demodulation circuit; and the oscillation signal generator is connected with the modulation/demodulation circuit and the controller. The utility model provides the RFID tag reader-writer with compact structure.
Description
Technical field
The utility model relates to a kind of RFID tag read-write equipment.
Background technology
The RFID RF identification is a kind of contactless automatic identification technology, and it is through the automatic recognition objective object of radiofrequency signal and obtain related data, and identification work need not manual intervention, can work in various rugged surroundings.The RFID technology can be discerned high-speed moving object and can discern a plurality of labels simultaneously, and is swift and convenient to operate.RFID is a kind of simple wireless system, has only two basic devices, and this system is used for control, detection and tracking object.System is made up of an interrogator (or reader) and a lot of transponder (or label).
Yet element is complicated in the existing rfid interrogator, poor work stability, and this has influenced rfid interrogator and has embedded the convenience in other devices.
The utility model content
The purpose of the utility model is to overcome the above-mentioned deficiency of prior art, and a kind of improved RFID tag read-write equipment is provided.
The utility model provides a kind of RFID tag read-write equipment, it is characterized in that, comprising: antenna; Sensor circuit is connected in series to said antenna; Amplifying circuit is connected in series to said sensor circuit; Resonant circuit is connected in series to said antenna; Modulation/demodulation circuit is connected in series to said resonant circuit; Controller, the two links to each other with said amplifying circuit and said modulation/demodulation circuit; And oscillation signal generator, link to each other with said controller with said modulation/demodulation circuit.
Utilize above-mentioned structure, the utility model can provide a kind of RFID tag read-write equipment of compact conformation.
Description of drawings
Fig. 1 is the schematic diagram that the RFID tag read-write equipment of the utility model is shown.
Fig. 2 is the exemplary circuit diagram of amplifying circuit of the RFID tag read-write equipment of the utility model.
Fig. 3 is the exemplary circuit diagram of sensor circuit of the RFID tag read-write equipment of the utility model.
Fig. 4 is the exemplary circuit diagram of modulation/demodulation circuit of the RFID tag read-write equipment of the utility model.
Embodiment
The embodiment of the utility model being done below in conjunction with accompanying drawing is elaborated.
As shown in Figure 1, the RFID tag read-write equipment of the utility model comprises: antenna 1; Sensor circuit 2, it is connected in series to antenna 1; Amplifying circuit 3, it is connected in series to sensor circuit 2; Resonant circuit 7, it is connected in series to antenna 1; Modulation/demodulation circuit 6, it is connected in series to resonant circuit 7; Controller 4, the two links to each other with amplifying circuit 3 and modulation/demodulation circuit 6; And oscillation signal generator 5, link to each other with controller 4 with modulation/demodulation circuit 6.
As shown in Figure 2, be the exemplary circuit diagram of amplifying circuit 3 of the RFID tag read-write equipment of the utility model.The emitter of triode Q1 links to each other with the end of the capacitor C that is connected in parallel 4, coil L2 through resistance R 4 ground connection, collector; The base stage of triode Q1 connects capacitor C 3 and links to each other with an end of resistance R 2, resistance R 3; The other end ground connection of resistance R 3, the other end of resistance R 2 links to each other with the other end that is connected in parallel and meet capacitor C 4, the coil L2 of positive source and is connected to power Vcc.The input terminal 11 of this amplifying circuit 3 on capacitor C 3 links to each other with the outlet terminal 8 of sensor circuit, and another outlet terminal 10 that is connected on the triode Q1 emitter is connected with controller.
As shown in Figure 3, be the exemplary circuit diagram of the sensor circuit 2 of the RFID tag read-write equipment of the utility model.This sensor circuit 2 comprises the capacitor C 1 and diode D2 that is cascaded; The negative pole of diode D1 is connected between the positive pole of capacitor C 1 and diode D2, positive pole connects power cathode; Capacitor C 2, coil L1 are connected across between the negative pole and power cathode of diode D2, and the input terminal 11 that is connected on the capacitor C 3 in outlet terminal 8 and the amplifying circuit 3 on the diode D2 negative pole links to each other.Antenna is connected on the input terminal 9 of power cathode and capacitor C 1.
As shown in Figure 4, be the exemplary circuit diagram of the modulation/demodulation circuit 6 of the RFID tag read-write equipment of the utility model.This modulation/demodulation circuit 6 comprises: ic chip; Be connected between positive source, the negative pole; The output terminal coils L3 of ic chip links to each other with an end of resistance R 5, and the other end of resistance R 5 connects power cathode through transistor Q2, and the input terminal 12 of transistor Q2 is connected electrically on the oscillation signal generator 5; The outlet terminal 13 that is connected between coil L3 and the resistance R 5 is connected electrically on the resonant circuit 7, and the input terminal 14 of ic chip 1 is connected electrically on the controller 4.The input terminal 14 of ic chip is connected on the controller, and under the control of controller, this ic chip plays switch control and amplification.
The controller 4 of the utility model can be selected common single-chip microcomputer or microprocessor, for example R5F21174SP of Sa Rui (Renesas) or the like.Identical on oscillation signal generator 5 resonant circuit 7 and the existing electronic label read/write.
Below, the course of work of the RFID tag read-write equipment of description the utility model.
Utilize above-mentioned structure and exemplary circuit, the utility model can provide a kind of RFID tag read-write equipment of compact conformation.
Above-described structure only is exemplary with handling, and is not the scope that is used to limit the utility model.Those skilled in the art will appreciate that and to carry out various changes to the utility model, and do not break away from the spirit and the scope of the utility model.
Claims (4)
1. a RFID tag read-write equipment is characterized in that, comprising:
Antenna;
Sensor circuit is connected in series to said antenna;
Amplifying circuit is connected in series to said sensor circuit;
Resonant circuit is connected in series to said antenna;
Modulation/demodulation circuit is connected in series to said resonant circuit;
Controller, the two links to each other with said amplifying circuit and said modulation/demodulation circuit; And
Oscillation signal generator links to each other with said controller with said modulation/demodulation circuit.
2. RFID tag read-write equipment as claimed in claim 1 is characterized in that:
Said amplifying circuit comprises: triode Q1, resistance R 2, resistance R 3, resistance R 4, coil L2, capacitor C 3 and capacitor C 4,
Wherein, the emitter of triode Q1 is through resistance R 4 ground connection, and collector links to each other with the end of the capacitor C that is connected in parallel 4, coil L2, and base stage connects capacitor C 3 and links to each other with an end of resistance R 2, resistance R 3, and
The other end ground connection of resistance R 3, the other end of resistance R 2 links to each other with the other end that is connected in parallel and meet capacitor C 4, the coil L2 of positive source and is connected to power supply.
3. RFID tag read-write equipment as claimed in claim 1 is characterized in that:
Said sensor circuit comprises: capacitor C 1, capacitor C 2, diode D1, diode D2 and coil L1,
Wherein, capacitor C 1 and diode D2 series connection,
The negative pole of diode D1 is connected between the positive pole of capacitor C 1 and diode D2, and positive pole connects power cathode,
Capacitor C 2, coil L1 are connected across between the negative pole and power cathode of diode D2.
4. RFID tag read-write equipment as claimed in claim 1 is characterized in that:
Said modulation/demodulation circuit comprises: ic chip, resistance R 5, transistor Q2 and coil L3,
Wherein, ic chip is connected between positive source, the negative pole, and the output terminal coils L3 of ic chip links to each other with an end of resistance R 5, and the other end of resistance R 5 is connected to power cathode through transistor Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204377422U CN202422159U (en) | 2011-11-08 | 2011-11-08 | RFID tag reader-writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204377422U CN202422159U (en) | 2011-11-08 | 2011-11-08 | RFID tag reader-writer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202422159U true CN202422159U (en) | 2012-09-05 |
Family
ID=46746897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204377422U Expired - Fee Related CN202422159U (en) | 2011-11-08 | 2011-11-08 | RFID tag reader-writer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202422159U (en) |
-
2011
- 2011-11-08 CN CN2011204377422U patent/CN202422159U/en not_active Expired - Fee Related
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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: 20120905 Termination date: 20141108 |
|
| EXPY | Termination of patent right or utility model |