CN202472698U - UHF read-write module applied to mobile data terminal - Google Patents
UHF read-write module applied to mobile data terminal Download PDFInfo
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- CN202472698U CN202472698U CN201120546015XU CN201120546015U CN202472698U CN 202472698 U CN202472698 U CN 202472698U CN 201120546015X U CN201120546015X U CN 201120546015XU CN 201120546015 U CN201120546015 U CN 201120546015U CN 202472698 U CN202472698 U CN 202472698U
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- mobile data
- power supply
- data terminal
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Abstract
The utility model relates to a UHF (Ultra High Frequency) read-write module applied to a mobile data terminal. The UHF read-write module applied to the mobile data terminal includes a power source unit, a processing control unit and a radio frequency unit. The radio frequency unit includes an RFID read-write chip and an RFID read-write chip peripheral circuit. The power source unit includes a power source passive filtering circuit, a power source boosting circuit and a power source linear voltage stabilizer chip circuit. The UHF read-write module applied to the mobile data terminal provided by the utility model has advantages of low power consumption, small size, long label read-write rang and high multi-label read-write speed. And the UHF read-write module applied to the mobile data terminal can be integrated on different mobile data terminals conveniently. The UHF read-write module applied to the mobile data terminal matches with a corresponding UHF antenna and the reading range of an electronic label is more than two meters. The UHF read-write module applied to the mobile data terminal is widely applied to different industries of logistics, wine anti-counterfeit technology, garment, personnel monitoring, food safety, tobacco management and the like.
Description
Technical field
The utility model relates to a kind of UHF module for reading and writing that is applied to mobile data terminal.
Background technology
It is far away that the super high frequency radio frequency recognition technology has reading/writing distance, many tag recognition, and advantages such as security height are widely used in industries such as logistics, Wine anti-counterfeit, clothes, personnel control, food security, tobacco management.The effect of the ultrahigh frequency module for reading and writing of mobile data terminal is to send modulation wave signal to one or more label; Label is through same modulated RF carrier wave received power; The label back-scattered signal that is activated; Module for reading and writing is handled through the electronic tag back-scattered signal being carried out demodulation, amplification, decoding and decoding, realizes fixing perhaps the reading of peculiar data to the electronic tag storage inside, also can rewrite the data of electronic tag.Mobile data terminal is stored the label information that the ultrahigh frequency module for reading and writing reads, and sends background server to through communication module.
The working frequency range of ultrahigh frequency RFID module for reading and writing is 860～960MHz, the EPC Gen2 standard that ISO18000-6B/C that the compatible ISO of air interface standard organizes to set up and EPCglobal organize to set up.Module for reading and writing can read the electronic tag that satisfies above-mentioned two kinds of standards at a distance.
The UHF module for reading and writing exists power consumption big at present, and tag read distance is short, and many tag recognition reading performance is poor, and size is bigger, can not conveniently be integrated in and wait some problems on some mobile data terminals.
The utility model content
To above-mentioned technical matters, it is little that the utility model purpose provides a kind of size, low in energy consumption, and emissive power is high, the UHF module for reading and writing that is applied to mobile data terminal that antijamming capability is strong.
The utility model adopts following scheme; Comprise power supply unit, processing and control element (PCE) and radio frequency unit, power supply unit comprise the power supply transforming circuit; Radio frequency unit comprises RFID read-write chip and RFID read-write chip peripheral circuit; Power supply unit is connected with RFID read-write chip peripheral circuit with the RFID read-write chip respectively, and RFID read-write chip and RFID read-write chip peripheral circuit interconnect and constitute radiating circuit and receiving circuit, and processing and control element (PCE) and RFID read-write chip interconnect; RFID read-write chip peripheral circuit comprises power amplifier, directional coupler and wave filter; The output terminal of its intermediate power amplifier is connected with the input end of wave filter, and the output terminal of wave filter is connected with the input end of directional coupler, and power supply unit also comprises the linear voltage regulator chip circuit of power supply.
Said power supply transforming circuit comprises power supply passive filter circuit, power supply booster circuit, and wherein the output terminal of power supply passive filter circuit is connected with the input end of power supply booster circuit.
Comprise by processing and control element (PCE) control in the linear voltage regulator chip circuit of said power supply, be used for the linear voltage regulator chip that the voltage to the ride gain of power amplifier carries out the control of dutycycle size.
The WV of the said UHF module for reading and writing that is applied to mobile data terminal is by external lithium battery voltage fed.
Said processing and control element (PCE) is 32 cortex M3 processors of the STM32F series of ST Microelectronics.
The said working frequency range that is applied to the UHF module for reading and writing of mobile data terminal is 840～960MHz.
The utility model provides a kind of size little, low in energy consumption, and emissive power is high, the UHF module for reading and writing that is applied to mobile data terminal that antijamming capability is strong.Have low in energy consumptionly, and size is little, the tag read distance, and many labels reading rate is fast, can be integrated in the advantage on the various mobile data terminals easily.
Description of drawings
Fig. 1 is a typical mobile data terminal block diagram;
Fig. 2 is the integral module block diagram of the utility model;
Fig. 3 is the power supply unit topological diagram of the utility model UHF module for reading and writing;
Fig. 4 is the RFID read-write chip peripheral circuit topological diagram of the utility model UHF module for reading and writing.
Embodiment
Below in conjunction with Figure of description the embodiment of the utility model is done further detailed explanation.
Like Fig. 2, Fig. 3 and shown in Figure 4; A kind of UHF module for reading and writing that is applied to mobile data terminal that the utility model relates to; Comprise power supply unit; Processing and control element (PCE) and radio frequency unit, radio frequency unit comprise RFID read-write chip and RFID read-write chip peripheral circuit, and wherein power supply unit is connected with RFID read-write chip peripheral circuit with the RFID read-write chip respectively; RFID read-write chip and RFID read-write chip peripheral circuit interconnect and constitute radiating circuit and receiving circuit; Processing and control element (PCE) and RFID read-write chip interconnect carries out alternately, and the RFID read-write chip is that processing and control element (PCE) is supplied power, and RFID read-write chip peripheral circuit comprises power amplifier, directional coupler and wave filter; The output terminal of its intermediate power amplifier is connected with the input end of wave filter; The output terminal of wave filter is connected with the input end of directional coupler, and power supply unit comprises power supply transforming circuit and the linear voltage regulator chip circuit of power supply, and the power supply transforming circuit comprises power supply passive filter circuit, power supply booster circuit; Wherein the output terminal of power supply passive filter circuit is connected with the input end of power supply booster circuit, and the external lithium battery potential source of power supply unit is connected with the input end of power supply passive filter circuit, the input end of the linear voltage regulator chip circuit of power supply respectively.
Comprise by processing and control element (PCE) control in the linear voltage regulator chip circuit of said power supply, be used for the linear voltage regulator chip that the voltage to the ride gain of power amplifier carries out the control of dutycycle size.
The WV of the said UHF module for reading and writing that is applied to mobile data terminal is by external lithium battery voltage fed.
Said processing and control element (PCE) is 32 cortex M3 processors of the STM32F series of ST Microelectronics.
Said RFID read-write chip is the special-purpose read-write chip of RFID.
The said working frequency range that is applied to the UHF module for reading and writing of mobile data terminal is 840～960MHz.
It is inner that the operations such as spread spectrum that transmit and receive Signal Processing (comprising modulation, coding and decoding), baseband signal in the radio frequency unit all are integrated in the RFID read-write chip; The base band sources of RFID read-write chip adopts the external temperature compensated crystal oscillator, forms required radiofrequency signal through inner phase-locked loop circuit then.
Radiating circuit in the radio frequency unit; Transmit and export by RFID read-write chip output terminal; Because transmit signal power is low; Use power amplifier to carry out power amplification, transmitting after the amplification outputs to antennal interface successively behind devices such as wave filter, directional coupler, and the effect of its median filter is to suppress the UHF module for reading and writing to transmit to the adjacent channel interference of other communication modules.
Receiving circuit in the radio frequency unit receives label signal is input to the RFID read-write chip through directional coupler input end by antennal interface; Receive and the emitting antenna employing same antenna; The effect of directional coupler is exactly to isolate radio frequency transmissions and receive back-scattered signal, can make the miniaturization more of UHF module for reading and writing like this.
The voltage of the ride gain of RFID read-write chip peripheral circuit intermediate power amplifier is realized by the linear voltage regulator chip in the linear voltage regulator chip circuit of power supply, and the pin that enables of linear voltage regulator chip is controlled by processing and control element (PCE).The voltage of the ride gain of power amplifier is the square wave of certain dutycycle like this, and the working method of power amplifier is a noncontinuity, and the difference through dutycycle realizes the reduction of power consumption in various degree.
The utility model is applied to the WV of UHF module for reading and writing of mobile data terminal by external lithium battery voltage fed; Wherein lithium battery voltage is successively through supplying power to the RFID read-write chip behind power supply passive filter circuit, the power supply booster circuit; Power amplifier directly adopts lithium battery voltage, and the voltage of the ride gain of power amplifier is realized by the linear voltage regulator chip in the linear voltage regulator chip circuit of power supply.
The said size that is applied to the UHF module for reading and writing of mobile data terminal is no more than 56mm * 35.6mm * 5mm.
As shown in Figure 1; The UHF module for reading and writing of the utility model is applied to mobile data terminal; Realize application processes in the operating system processing platform of mobile data terminal to label; The UHF module for reading and writing of the utility model not only can be compatible practical with other automatic module identified such as one-dimensional scanning head or camera, and can be compatible practical with GSM or WIFI communication module.
Fig. 3 has shown the power supply unit topological diagram of the UHF module for reading and writing of the utility model; The processing and control element (PCE) of UHF module for reading and writing is mainly realized the variety of protocol of electronic tag is handled; The RFID read-write chip is realized control; Power amplifier is realized power control, and with the interface of mobile data terminal, realize the various operations of host computer to label.
The RFID read-write chip of UHF module for reading and writing is inner integrated transmitter, receiver, the voltage-controlled oscillator (VCO) of phase-locked loop pll and phase detector, also integrated UHF agreement is stipulated the modulation to electronic tag data, encoding and decoding etc.
Shown in the power supply unit topological diagram of the UHF module for reading and writing of Fig. 3 the utility model; The WV of UHF module for reading and writing is by external lithium battery voltage fed; The enabling of the power supply of UHF module for reading and writing realized in that the UHF module for reading and writing is inner, can make the miniaturization more of UHF module for reading and writing like this.The WV of the RFID read-write chip of UHF module for reading and writing is 5V, must use the power supply booster circuit to give the power supply of RFID read-write chip, just can make RFID read-write chip operate as normal.Can be used as voltage source during RFID read-write chip operate as normal; Give chip power supplies such as processing and control element (PCE) and temperature compensating crystal oscillator; Reduce the use of power supply chip, and the out-put supply of RFID read-write chip is more stable, reduces the complexity of electric source topology; Be beneficial to the size of dwindling module for reading and writing, convenient integrated.Before the power supply booster circuit, increased the power supply passive filter circuit among Fig. 3; The principle of work of power supply booster circuit makes the ripple of power supply of input end become big; This ripple must effectively suppress as the power supply interference source; The performance of its intermediate power amplifier is strict to WV, so adopt the power supply passive filter circuit to isolate the two-way power supply.
The processing and control element (PCE) of the UHF module for reading and writing of the utility model and RFID read-write chip adopt and port communications, and port communications can be realized the data transmission and the storage of RFID read-write chip faster.Difference form is all adopted in the input and output of the radiofrequency signal of RFID read-write chip, and the signal that has reduced input end and output terminal disturbs, and uses non-equilibrium balun etc. at input end and output terminal.The transmitter section of UHF module for reading and writing adopts wave filter to carry out filtering, both can realize impedance matching, reduces the outer undesired signal of band of module and the decay of signal etc.The UHF module for reading and writing of the utility model has only an antennal interface, sends and receives and adopt same antenna, the emission of module and the isolation of reception to adopt directional coupler to realize.
The main power consumption components and parts of the UHF module for reading and writing of the utility model are power amplifier; The working method of power amplifier is just worked for having only when upper computer software sends querying command; So power amplifier is not continuous working; And the control of passing through power control voltage realizes different duty, the power consumption of the whole UHF module for reading and writing of reduction so in various degree.
The UHF module for reading and writing of the utility model is applied to mobile data terminal, can communicate by letter with other in the application and use such as communication module GSM, WIFI, EVDO etc. are compatible.Radio frequency part and digital baseband processing section for module shield, and so both can realize that the external interference of module also can suppress the interference of other modules to the UHF module, make module ability normal and stable operation.
The size of the UHF module for reading and writing of the utility model is little, can be integrated on the mobile data terminal, matees corresponding antenna, just can read and write at a distance the electronic tag that meets the UHF agreement.
The UHF module for reading and writing of the utility model low in energy consumption, and the compatible label that reads ISO18000-6 series and EPC Gen2 agreement, the research and development once more through the later stage can be widely used in numerous industries such as logistics, clothes, Wine anti-counterfeit, tobacco.
Combine accompanying drawing that the embodiment of the utility model has been done detailed description above; But the utility model is not limited to above-mentioned embodiment; In the ken that those of ordinary skills possessed, can also under the prerequisite that does not break away from the utility model aim, make various variations.
Claims (6)
1. UHF module for reading and writing that is applied to mobile data terminal; Comprise power supply unit, processing and control element (PCE) and radio frequency unit, power supply unit comprise the power supply transforming circuit; Radio frequency unit comprises RFID read-write chip and RFID read-write chip peripheral circuit; Power supply unit is connected with RFID read-write chip peripheral circuit with the RFID read-write chip respectively, and RFID read-write chip and RFID read-write chip peripheral circuit interconnect and constitute radiating circuit and receiving circuit, and processing and control element (PCE) and RFID read-write chip interconnect; It is characterized in that: RFID read-write chip peripheral circuit comprises power amplifier, directional coupler and wave filter; The output terminal of its intermediate power amplifier is connected with the input end of wave filter, and the output terminal of wave filter is connected with the input end of directional coupler, and power supply unit also comprises the linear voltage regulator chip circuit of power supply.
2. according to the said a kind of UHF module for reading and writing that is applied to mobile data terminal of claim 1; It is characterized in that: said power supply transforming circuit comprises power supply passive filter circuit, power supply booster circuit, and wherein the output terminal of power supply passive filter circuit is connected with the input end of power supply booster circuit.
3. according to the said a kind of UHF module for reading and writing that is applied to mobile data terminal of claim 1; It is characterized in that: comprise by processing and control element (PCE) control in the linear voltage regulator chip circuit of said power supply, be used for the linear voltage regulator chip that the voltage to the ride gain of power amplifier carries out the control of dutycycle size.
4. according to the said a kind of UHF module for reading and writing that is applied to mobile data terminal of claim 1, it is characterized in that: the WV of the said UHF module for reading and writing that is applied to mobile data terminal is by external lithium battery voltage fed.
5. according to the said a kind of UHF module for reading and writing that is applied to mobile data terminal of claim 1, it is characterized in that: said processing and control element (PCE) is 32 cortex M3 processors of the STM32F series of ST Microelectronics.
6. according to the said a kind of UHF module for reading and writing that is applied to mobile data terminal of claim 1, it is characterized in that: the said working frequency range that is applied to the UHF module for reading and writing of mobile data terminal is 840～960MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120546015XU CN202472698U (en) | 2011-12-23 | 2011-12-23 | UHF read-write module applied to mobile data terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120546015XU CN202472698U (en) | 2011-12-23 | 2011-12-23 | UHF read-write module applied to mobile data terminal |
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| Publication Number | Publication Date |
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| CN202472698U true CN202472698U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201120546015XU Expired - Lifetime CN202472698U (en) | 2011-12-23 | 2011-12-23 | UHF read-write module applied to mobile data terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102880152A (en) * | 2012-10-15 | 2013-01-16 | 电子科技大学中山学院 | Internet of things control device for indoor environment adjustment equipment |
-
2011
- 2011-12-23 CN CN201120546015XU patent/CN202472698U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102880152A (en) * | 2012-10-15 | 2013-01-16 | 电子科技大学中山学院 | Internet of things control device for indoor environment adjustment equipment |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |