CN202110569U

CN202110569U - Ultrahigh-frequency RFID (radio frequency identification device) reader-writer of embedded mobile communication terminal

Info

Publication number: CN202110569U
Application number: CN2011202242257U
Authority: CN
Inventors: 文光俊; 王波; 孙文彬
Original assignee: University of Electronic Science and Technology of China
Current assignee: University of Electronic Science and Technology of China
Priority date: 2011-06-29
Filing date: 2011-06-29
Publication date: 2012-01-11
Anticipated expiration: 2021-06-29

Abstract

The utility model discloses an ultrahigh-frequency RFID (radio frequency identification device) reader-writer of an embedded mobile communication terminal, comprising a radio frequency unit, an antenna unit, a power source management unit and a system control unit, wherein the system control unit, the radio frequency unit and the antenna unit are sequentially connected with each other; the power source management unit is connected with the system control unit and the radio frequency unit to provide a required work power source for the system control unit and the radio frequency unit and control the charging and the discharging of a battery; and the system control unit is used for responding a control instruction from an external mobile terminal, analyzing the control instruction, and transmitting a control signal to the radio frequency unit or the power source management unit, and the radio frequency unit is used for coding, decoding, modulating and demodulating the data and amplifying a generated radio frequency signal. The ultrahigh-frequency RFID reader-writer has the beneficial effects that the reader-writer is suitable for interface protocols provided by most mobile communication terminals at present, thereby realizing the generality and universality of the reader-writer during application, and being suitable for the fields for verifying electric ticket business, distinguishing the real and false of a commodity and the like.

Description

Embed the ultrahigh frequency radio frequency identification (RFID) reader of mobile communication terminal

Technical field

The utility model belongs to RF identification (RFID) technical field, is specifically related to a kind of super high frequency radio frequency identification equipment that embeds mobile communication terminal.

Background technology

RF identification (RFID; Radio Frequency Identification) be a kind of communication technology; Can discern specific objective and read and write related data through 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 CF, realizes the automatic identification to the label that gets into the read-write scope.Through being attached to label on the article, can realize all-the-way tracking and management to article.Radio-frequency recognition system generally is made up of reader/writer module, antenna and label three parts.Reader/writer module produces RF energy; Through sky alignment electronic tag emission RF energy, electronic tag (passive) is activated after receiving RF energy, reflected signal after electronic tag is obtained RF energy and instructed; Reader/writer module receives the signal that electronic tag reflects through antenna; The signal that tag reflection is returned carries out filtering, amplification, mixing, demodulation, decoding and decoding to be handled, and makes radiofrequency signal convert the digital signal that exterior terminal can be handled to, realizes the operation that the data of the fixed data of label stored and data field are read; In addition, can also write, lock and kill operation to label.At present, the application that mobile communication terminal combines with read write line becomes the new trend of RFID development, but the big problem of read write line ubiquity power consumption, and the communication mode between portable terminal and the read write line lacks versatility.

The utility model content

The purpose of the utility model is in order to solve the problem that above-mentioned existing read write line exists, to have proposed to embed the ultrahigh frequency radio frequency identification (RFID) reader of mobile communication terminal.

In order to realize above purpose; Technical scheme of the present invention is: the ultrahigh frequency radio frequency identification (RFID) reader that embeds mobile communication terminal; Comprise radio frequency unit and antenna element; It is characterized in that also comprise PMU and system control unit, said system control unit, radio frequency unit and antenna element are connected successively; PMU and system control unit and radio frequency unit are connected to system control unit and radio frequency unit provides the required working power and the charging and the discharge of control battery; System control unit is used to respond the control command from the portable terminal of outside; Resolve control command and control signal is sent to radio frequency unit or PMU; Radio frequency unit is accomplished coding, decoding, the modulation and demodulation of data, and the radiofrequency signal that produces is amplified.

The beneficial effect of the utility model is: the utility model adopts the design philosophy of miniaturization, and PMU adopts the single-chip power solution, has the low characteristics of volume low power consumption; It is main scheme that radio frequency unit adopts rf chip; Working frequency range is 840Mhz～960Mhz, can read and write the electronic tag of ISO/IEC 18000-6C standard, to the interface employing USB of outside; Meet interface protocol that present most of mobile communication terminal provides; Thereby realize versatility and the popularity of read write line in application, be applicable to the checking of electronic bill, scenes such as the discriminating of commodity true and false.

Description of drawings

Fig. 1 is the system construction drawing of the utility model.

Fig. 2 is the PMU power supply chip circuit of an embodiment of the utility model.

Fig. 3 is the system control unit main control chip circuit of an embodiment of the utility model.

Fig. 4 is the system control unit main control chip circuit of an embodiment of the utility model.

Fig. 5 is the system control unit SDRAM memory circuitry of an embodiment of the utility model.

Fig. 6 is the system control unit FLASH memory circuitry of an embodiment of the utility model.

Fig. 7 is the radio frequency unit radio frequency chip circuit of an embodiment of the utility model.

Fig. 8 is the USB circuit of an embodiment of the utility model.

Embodiment

Below in conjunction with accompanying drawing and concrete embodiment the utility model is done further explanation.

As shown in Figure 1, the ultrahigh frequency radio frequency identification (RFID) reader of embedding mobile communication terminal comprises radio frequency unit and antenna element, it is characterized in that also comprise PMU and system control unit, said system control unit, radio frequency unit and antenna element are connected successively; PMU and system control unit and radio frequency unit are connected to system control unit and radio frequency unit provides the required working power and the charging and the discharge of control battery; System control unit is used to respond the control command from the portable terminal of outside; Resolve control command and control signal is sent to radio frequency unit or PMU; Radio frequency unit is accomplished coding, decoding, the modulation and demodulation of data, and the radiofrequency signal that produces is amplified.Above-mentioned radio frequency unit comprises digital baseband circuit, radiating circuit, receiving circuit and oscillatory circuit.Antenna element is used to transmit and receive radiofrequency signal.

Concrete structure in the face of above-mentioned unit launches explanation down:

The function of PMU is for other each unit of ultrahigh frequency radio frequency identification (RFID) reader power supply to be provided.As shown in Figure 2, PMU provides 1.8V and 3.3V power supply for the main control chip, for SDRAM storer and FLASH storer provide 3.3V power supply, and for rf chip PR9000 provides 3.3V power supply, the charging and the discharge of control battery.When importing as power supply by battery; Whether 11 pin of D301, R302 and U301 can indicate powered battery normal; Battery output is through inputing to the inner double switch power supply of U301 after the C305 filtering; Be 7,8 pin and 5 pin of U301, pass through resistance R 304 simultaneously, C304 filtering inputs to 6 pin of U301.U301 can input to 40 pin of U301 by external dc power through C301 filtering power supply, and 41,42 pin through U301 are filtered into battery charge through C303.U301 also can be filtered into battery charge through C312 through USB interface.A road inner VCORE Switching Power Supply of U301 is exported 1.1V through C306 filtering, and another road VMAIN Switching Power Supply is through C307, C314 filtering output 3.3V, i.e. 13 pin of U301.19,22 pin that VMAIN process C302 filtering inputs to U301 are the power supply of the inner two-way low pressure difference linearity of U301 stabilized voltage supply; Wherein one road VLDO1 is the 24 pin process C309 filtering output of U301; Can adjust the output voltage of VLDO1 through the resistance value that changes R309, R310; Make VLDO1 acquiescence output 3.3V be the power supply of PR9000 radio frequency chip, another road VLDO2 is the filtering output 1.8Vs of 20 pin of U301 through C308, is the power supply of main control chip kernel.1,12,39 and 27 pin of U301 are connected to the battery output terminal through R318, the acquiescence output of the double switch power supply VCORE of control U301 and VMAIN and the electrifying timing sequence of power supply.37 pin of U301 can be adjusted the size of charging current through R301 ground connection through the resistance value that changes R301.29,30,32,33,34 and 35 pin of U301 are pulled to VLDO1 through resistance R 311, R312, R308, R306, R307 and R305 respectively; Be connected to system master chip GPIO, make system control chip can read the status information of power management chip and control its output.

System control unit is made up of main control chip circuit, SDRAM chip circuit, FLASH chip circuit.Like Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6; Main control chip and outside SDRAM are through inner address bus and data bus interconnection; Adopt the SDRAM storer of the chip composition 64MB-32 position of two 32MB; Data line is from totally 32 of DATA0 to DATA31, and address wire is from totally 26 of ADDR0 to ADDR25.FLASH adopts 8 position datawires and the multiplexing connected mode of address wire, carries out data transmission through read-write control signal.Change the resistance value of R100 and R106, the Starting mode of system can be set, the Starting mode of acquiescence is the zero-address startup from NAND FLASH.

Radio frequency unit comprises radio frequency chip and transmission circuit, and is as shown in Figure 7, voltage controlled oscillator and phase-locked loop circuit that the radio frequency chip U91 of radio frequency unit is inner, and the oscillatory circuit of radio frequency unit constitutes the carrier wave combiner circuit.13 and 14 pin of U91 are as the radiofrequency signal output terminal, and 6 and 7 pin are as RF signal input end, and the working frequency range of radio frequency unit is 840MHz～960MHz.

Shown in Figure 8 is USB, and RA401 is used for the terminal impedance coupling, and HOST end differential signal line is parallelly connected R514 and R515 ground connection respectively; DEVICE holds signal line parallel connection R512 to be connected to the main control chip, another signal line parallel connection R513 ground connection.

Further specify the workflow of the ultrahigh frequency radio frequency identification (RFID) reader of the utility model below: connect circuit; Install battery and antenna; Be connected with the mobile communication terminal of outside then, open the ultrahigh frequency radio frequency identification (RFID) reader module, each several part circuit operate as normal; Mobile communication terminal sends a command to read write line, promptly can read and write the electronic tag that meets ISO 18000-6C.

Those of ordinary skill in the art will appreciate that embodiment described here is in order to help the principle of reader understanding's the utility model, should to be understood that the protection domain of utility model is not limited to such special statement and embodiment.Every making according to foregoing description variously possible be equal to replacement or change, and all is considered to belong to the protection domain of the claim of the utility model.

Claims

1. embed the ultrahigh frequency radio frequency identification (RFID) reader of mobile communication terminal, comprise radio frequency unit and antenna element, it is characterized in that also comprise PMU and system control unit, said system control unit, radio frequency unit and antenna element are connected successively; PMU and system control unit and radio frequency unit are connected to system control unit and radio frequency unit provides the required working power and the charging and the discharge of control battery; System control unit is used to respond the control command from the portable terminal of outside; Resolve control command and control signal is sent to radio frequency unit or PMU; Radio frequency unit is accomplished coding, decoding, the modulation and demodulation of data, and the radiofrequency signal that produces is amplified.