CN201993781U - Ultrahigh frequency radio frequency identification reader-writer module - Google Patents
Ultrahigh frequency radio frequency identification reader-writer module Download PDFInfo
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- CN201993781U CN201993781U CN2011200680651U CN201120068065U CN201993781U CN 201993781 U CN201993781 U CN 201993781U CN 2011200680651 U CN2011200680651 U CN 2011200680651U CN 201120068065 U CN201120068065 U CN 201120068065U CN 201993781 U CN201993781 U CN 201993781U
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Abstract
The utility model discloses an ultrahigh frequency (UHF) radio frequency identification (RFID) reader-writer module. The UHF RFID reader-writer module specifically comprises a power source unit, a control unit and a radio frequency (RF) unit, wherein the power source unit provides working voltages for the control unit and the RF unit; the control unit controls the working of the RF unit and processes data returned by the RF unit; the RF unit which completes the encoding, the decoding, the modulation and the demodulation of data and magnifies produced RF signals comprises a transmitting circuit and a receiving unit; and the power source unit comprises a first stage switching power source chip, and a second stage linear power source chip controlled by the control unit. The utilization rate of the power source is improved through the high efficiency of the switching power source chip TPS61086, and then the linear power source chip is enabled to work intermittently through the second stage linear power source chip controlled by the control unit, so that power consumption of the whole reader-writer module can be reduced; and the sensitivity is improved and various protocols are compatible through adopting a special RF receiving and transmitting chip AS3992.
Description
Technical field
The utility model belongs to the REID field, relates in particular to a kind of super high frequency radio frequency recognition read-write machine module.
Background technology
Radio-frequency (RF) identification (RFID, Radio Frequency Identification) be a kind of communication technology, can discern specific objective and read and write related data by radio signal, and need not to set up machinery between recognition system and the specific objective or optics contacts, its basic principle of work is to utilize the radio wave energy of read write line emission characteristic frequency, realizes the automatic identification to the label that enters the read-write scope.By label is attached on the article, can realize all-the-way tracking and management to article.Radio-frequency recognition system generally is made of reader/writer module, antenna and label three parts.Reader/writer module produces radio-frequency (RF) energy, by sky alignment electronic tag emission radio-frequency (RF) energy, electronic tag (passive) is activated after receiving radio-frequency (RF) energy, electronic tag is obtained radio-frequency (RF) energy and is instructed reflected signal afterwards, reader/writer module receives the signal that electronic tag reflects by antenna, the signal that tag reflection is returned carries out filtering, amplify, mixing, demodulation, decoding and decoding are handled, make radiofrequency signal convert the digital signal that exterior terminal can be handled to, the operation that realization is read the data of the fixed data of label stored and data field, in addition, can also write label, lock and kill operation.At present, the ubiquitous problem of reader/writer module is that power consumption is big, reading/writing distance is near, read-write poor sensitivity and can not compatible various protocols.
The utility model content
The purpose of this utility model is in order to solve the problem that above-mentioned existing reader/writer module exists, to have proposed a kind of reader/writer module of super high frequency radio frequency identification equipment.
To achieve these goals, technical scheme of the present invention is: a kind of reader/writer module of super high frequency radio frequency identification equipment, comprise power supply unit, control module and radio frequency unit, power supply unit provides operating voltage for control module and radio frequency unit, the work of control module control radio frequency unit, and the data that radio frequency unit returns are handled, radio frequency unit is finished the coding of data, decoding, modulation and demodulation, and the radiofrequency signal that produces amplified, radio frequency unit comprises radiating circuit and receiving circuit, it is characterized in that, power supply unit is formed by the switching power source chip of the first order with by the partial linear power supply chip of control module control, and described switching power source chip is TPS61086.
Described radiating circuit changes unbalanced circuit, power amplifier circuit and coupling mechanism by rf chip, balance and forms, the radiofrequency signal that rf chip produces matches 50 ohm through external matching circuit, change unbalanced circuit through balance again and be converted to single-ended signal, launch through power amplifier circuit and coupling mechanism.
Described receiving circuit is made up of coupling mechanism, attenuator circuit, uneven balancing circuitry, match circuit and the rf chip of changeing, the signal that receives is through filter filtering, coupled end output from coupling mechanism, after the uneven commentaries on classics of process balancing circuitry is converted to balanced signal, be input to rf chip through match circuit again.
Above-mentioned rf chip is AS3992.
The beneficial effects of the utility model: the power supply unit in the reader/writer module of the present utility model has improved the power utilization rate by the high-level efficiency of switching power source chip TPS61086 on the one hand, again by partial linear power supply chip by control module control, can be so that linear power supply chip intermittent work, and then can reduce the power consumption of whole reader/writer module.By the power amplifier circuit in the radiating circuit, realize high power and high linearity, and then can improve reading/writing distance, adopt special-purpose rf chip AS3992 to improve sensitivity and the compatible various protocols of energy.
Description of drawings
Fig. 1 is the theory diagram of the utility model super high frequency radio frequency recognition read-write machine module.
Fig. 2 is the switching power supply circuit theory diagrams of the utility model embodiment.
Fig. 3 is the power circuit principle figure to the power amplifier circuit power supply of the utility model embodiment.
Fig. 4 is the rf chip circuit theory diagrams of the utility model embodiment.
Fig. 5 is the rf power amplifier circuit schematic diagram of the utility model embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
The theory diagram of super high frequency radio frequency recognition read-write machine module of the present utility model as shown in Figure 1, comprise power supply unit, control module and radio frequency unit, power supply unit provides operating voltage for control module and radio frequency unit, the work of control module control radio frequency unit, and the data that radio frequency unit returns are handled, radio frequency unit is finished the coding of data, decoding, modulation and demodulation, and the radiofrequency signal that produces amplified, radio frequency unit comprises radiating circuit, receiving circuit, power supply unit is formed by the switching power source chip of the first order with by the partial linear power supply chip of control module control.
The radiating circuit here changes unbalanced circuit, power amplifier circuit and coupling mechanism by rf chip, balance and forms, the radiofrequency signal that rf chip produces matches 50 ohm through external matching circuit, change unbalanced circuit through balance again and be converted to single-ended signal, launch through power amplifier circuit and coupling mechanism.
The receiving circuit here is made up of coupling mechanism, attenuator circuit, uneven balancing circuitry, match circuit and the rf chip of changeing.The signal that receives from the coupled end output of coupling mechanism, after the uneven commentaries on classics of process balancing circuitry is converted to balanced signal, is input to rf chip through match circuit through filter filtering again.
The control module here belongs to general knowledge known to a person of ordinary skill in the art, no longer is described in detail at this.In order to narrate conveniently, part is represented control module with PIC24 in the narration below.
Below concrete expansion the in foregoing circuit unit is described as follows:
The function of power supply unit is that each unit for the ultrahigh frequency radio frequency identification (RFID) reader module provides power supply.Shown in Fig. 2 and 3, power supply unit is radio frequency unit, control module power supply, for rf chip AS3992 provides 5.2V power supply, for power amplifier circuit provides 5V power supply.Concrete embodiment is as follows: as shown in Figure 2, the voltage (3-5V) of outside input is input to the switching power source chip U1 of the first order after capacitor C 1 and C2 filtering, be 8 pin of TPS61086, Enable Pin pin 3 is connected to 8 pin, enable signal as chip, 9 pin are connected to 8 pin makes chip operation under heavy duty state, 4 pin and 5 pin are connected to ground, 6 pin and 7 pin are connected to 8 pin by inductance L 1,2 pin are connected to resistance R 1, R2 provides output required reference voltage, and 1 pin is connected to ground by resistance R 2 and capacitor C 3, provide frequency of operation to chip, 10 pin are connected to ground through capacitor C 11.6, behind 7 pin process diode D520 and the filter capacitor C4, the voltage of output 5.5V.
As shown in Figure 3, the 5.5V voltage that produces of first order switching power source chip is divided into 2 the tunnel, the one tunnel is input to partial linear power supply chip U3 after C8 filtering, be 2 pin of MIC3775BMM, 2 pin of U3 are connected to 1 pin, and as the enable signal of chip, 5,6,7,8 are connected to ground, 3 pin are connected to R6, R7 provides output voltage required reference voltage, and 4 pin are connected to resistance R 7, after capacitor C 9 filtering, output 5.2V voltage; Another road is input to partial linear power supply chip U88 after capacitor C 110 filtering, i.e. 2 pin of MIC39102BM, 1 pin of U88 be chip enable the input signal pin, be connected to control module by resistance R 2011.4 pin of U88 are the reference voltage output pin, are connected to resistance R 2090 and R2100, and after 3 pin were connected to resistance R 2090, output 5V voltage was powered to power amplifier circuit after capacitor C 111 filtering.
Here power supply unit has improved the power utilization rate by the high-level efficiency of switching power source chip on the one hand, again by partial linear power supply chip by control module control, can be so that linear power supply chip intermittent work, and then can reduce the power consumption of whole reader/writer module.
The function of radio frequency unit is: produce radio-frequency carrier by rf chip, amplify through power amplifier circuit, by antenna emission radio-frequency carrier, radio-frequency (RF) energy active electron label by carrier wave, and the data information transfer that will be modulated to carrier wave is given electronic tag, receive the data message that label returns simultaneously, by antenna transmission to receiving circuit.For the electronic tag that meets ISO 18000-6A/B/C agreement, rf chip is not only finished modulating/demodulating, the shaping to data, also can start the underlying protocol processor of its chip internal, finish the volume of label data is separated, comprise and read label, writing labels, lock label and kill label.
Radio frequency unit is divided into radiating circuit and receiving circuit.
Radiating circuit is specific as follows: shown in Figure 4 and 5, rf chip U4 is that pin 32, the 33 output differential signals of AS3992 are input to balanced-to-unblanced transformer after match circuit C36, C37, C38 coupling, i.e. 3,4 pin of U5.The voltage of pin 19 outputs of rf chip U4 is input to 32 and 33 pin of U4 behind C35, L6, L7 filtering and chokes, give the internal emission circuit supply.The pin 1 of U5 is input to outside power amplifier after the C39 coupling, as shown in Figure 5, the signal of pin 1 output of U5 is connected to U8 through input capacitance C71, it is the pin 3 of SPA2118, the 5V voltage of linear power supply chip U88 output is input to the pin 1 of U8 after C72 filtering, the 5V of U88 output is divided into 2 tunnel, one tunnel pin 2 that is input to U8 behind L11, another road is input to the pin 3 of U8 through resistance R 24.The 5V voltage of U88 output through capacitor C 73, C74 filtering after be input to the pin 4 of U8 after resistance R 26 current limlitings and capacitor C 78 filtering.After be connected to the output terminal of U8 after inductance L 12 chokes and resistance R 25 shuntings, promptly pin 5,6,7,8 through capacitor C 75 and C76 filtering for the 5V voltage of U88 output.The output terminal of U8, promptly pin 5,6,7,8 outputs to dual directional coupler behind output matching circuit L121, C77 and C79, and promptly the pin 1 of U9 is exported to external radiation through the pin 2 of U9.
Receiving circuit is specially: the electromagnetic wave of tag reflection is input to dual directional coupler after antenna receives, i.e. the pin 2 of U9, and from coupled end, promptly pin 3 is input to receiving attenuation circuit R30, R31, R32 after being coupled.Received signal after the decay is input to balanced-to-unblanced transformer, i.e. 1 pin of U11, and balance end output port 3 and 4 is input to pin 7 and the pin 9 of U4 respectively through coupling capacitance C80, C81.
For another shown in Figure 4, rf chip U4, i.e. the 62 pin output current pulses of AS3992 are input to 60 pin of U4, as the input reference voltage of VCO after capacitor C 62, C63, C64, C65, C66, resistance R 19, R211 shaping.
Here,, realize high power and high linearity, and then can improve reading/writing distance, adopt special-purpose rf chip AS3992 to improve the read-write that sensitivity also can realize multi-protocols by the power amplifier circuit in the radiating circuit.
The workflow of the utility model ultrahigh frequency radio frequency identification (RFID) reader module: connect circuit, energized, open the ultrahigh frequency radio frequency identification (RFID) reader module, the each several part circuit begins operate as normal, and the ultrahigh frequency radio frequency identification (RFID) reader module is operated accordingly according to the instruction that exterior terminal sends.Externally under the control of terminal, read-write meets the electronic tag of ISO 18000-6A/B/C, control module starts the reception/radiating circuit of radio frequency unit, open the feed circuit of power amplifier U8 simultaneously, entire circuit enters duty, and the data of encoding and decoding are interaction process between control module PIC24 and radio frequency chip AS3992.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help reader understanding's principle of the present utility model, should to be understood that the protection domain of utility model is not limited to such special statement and embodiment.Everyly make various possible being equal to according to foregoing description and replace or change, all be considered to belong to the protection domain of claim of the present utility model.
Claims (4)
1. super high frequency radio frequency recognition read-write machine module, comprise power supply unit, control module and radio frequency unit, power supply unit provides operating voltage for control module and radio frequency unit, the work of control module control radio frequency unit, and the data that radio frequency unit returns are handled, radio frequency unit is finished the coding of data, decoding, modulation and demodulation, and the radiofrequency signal that produces amplified, radio frequency unit comprises radiating circuit and receiving circuit, it is characterized in that, power supply unit is formed by the switching power source chip of the first order with by the partial linear power supply chip of control module control, and described switching power source chip is TPS61086.
2. super high frequency radio frequency recognition read-write machine module according to claim 1, it is characterized in that, described radiating circuit changes unbalanced circuit, power amplifier circuit, coupling mechanism and wave filter by rf chip, balance and forms, the radiofrequency signal that rf chip produces matches 50 ohm through external matching circuit, change unbalanced circuit through balance again and be converted to single-ended signal, launch through power amplifier circuit, coupling mechanism and wave filter.
3. super high frequency radio frequency recognition read-write machine module according to claim 1, it is characterized in that, described receiving circuit is made up of coupling mechanism, attenuator circuit, uneven balancing circuitry, match circuit and the rf chip of changeing, the signal that receives is through filter filtering, coupled end output from coupling mechanism, after the uneven commentaries on classics of process balancing circuitry is converted to balanced signal, be input to rf chip through match circuit again.
4. according to claim 2 or 3 described super high frequency radio frequency recognition read-write machine modules, it is characterized in that described rf chip is AS3992.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200680651U CN201993781U (en) | 2011-03-16 | 2011-03-16 | Ultrahigh frequency radio frequency identification reader-writer module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200680651U CN201993781U (en) | 2011-03-16 | 2011-03-16 | Ultrahigh frequency radio frequency identification reader-writer module |
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| CN201993781U true CN201993781U (en) | 2011-09-28 |
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| CN2011200680651U Expired - Fee Related CN201993781U (en) | 2011-03-16 | 2011-03-16 | Ultrahigh frequency radio frequency identification reader-writer module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509134A (en) * | 2011-11-12 | 2012-06-20 | 成都雷电微力科技有限公司 | Small-sized radio frequency identification device (RFID) reader-writer chip |
| CN105868812A (en) * | 2016-04-25 | 2016-08-17 | 成都五方传奇物联网技术有限公司 | Processing circuit based on radio frequency identification (RFID) technology |
-
2011
- 2011-03-16 CN CN2011200680651U patent/CN201993781U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509134A (en) * | 2011-11-12 | 2012-06-20 | 成都雷电微力科技有限公司 | Small-sized radio frequency identification device (RFID) reader-writer chip |
| CN105868812A (en) * | 2016-04-25 | 2016-08-17 | 成都五方传奇物联网技术有限公司 | Processing circuit based on radio frequency identification (RFID) technology |
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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: 20110928 Termination date: 20150316 |
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| EXPY | Termination of patent right or utility model |