CN201716739U - Small ultra-high frequency integral RFID reader - Google Patents
Small ultra-high frequency integral RFID reader Download PDFInfo
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- CN201716739U CN201716739U CN2010202661862U CN201020266186U CN201716739U CN 201716739 U CN201716739 U CN 201716739U CN 2010202661862 U CN2010202661862 U CN 2010202661862U CN 201020266186 U CN201020266186 U CN 201020266186U CN 201716739 U CN201716739 U CN 201716739U
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Abstract
The utility model discloses a small ultra-high frequency integral RFID reader, which solves the technical problem of lowering the cost of an RFID reader-writer. The technical scheme adopted by the reader includes that the small ultra-high frequency integral RFID reader comprises a control communication unit, the radio frequency receiving and transmitting unit and an antenna which are sequentially and electrically connected, the control communication unit and the radio frequency receiving and transmitting unit are discrete elements and arranged on a circuit board, and the circuit board is arranged inside a machine casing. Compared with the prior art, the reader has the advantages that a reading-writing module and the antenna compose an integral structure by adopting the discrete elements, the volume of the reader is not larger than 93.2mm*59.0mm*12.8mm, and the reader structurally realizes miniaturization and integration, is easy for installation, and greatly reduces the cost of the RFID reader on the basis of guaranteeing stable and reliable performance of the reader.
Description
Technical field
The utility model relates to a kind of radio frequency discrimination RFID equipment, particularly a kind of rfid interrogator.
Background technology
REID (Radio Frequency Identification) is a kind of noncontact tag information discriminating technology, rfid system is made up of read write line, electronic tag and antenna, it is to utilize wireless radio frequency mode to carry out the noncontact bidirectional data communication, to reach the purpose of recognition objective electronic tag.The ultrahigh frequency radio frequency identification (RFID) reader of prior art generally is divided into two kinds: a kind of is fixed read write line, and another kind is the handhold read-write device.Fixed read write line complex structure, volume be big, cost an arm and a leg, and is used for remote swift electron label information and reads.The handhold read-write device is easy to carry, and collection palm PC PDA, a two-dimension code scanner, camera, GPRS module, bluetooth module, WIFI module are one, but cost an arm and a leg.This two class RFID reader complex structure, price are expensive.
Summary of the invention
The purpose of this utility model provides the integrated RFID reader of a kind of UHF, and the technical matters that solve is to reduce the cost of rfid interrogator.
The utility model is by the following technical solutions: the integrated RFID reader of a kind of UHF, be electrically connected to form in proper order by control communication unit, Transmit Receive Unit and antenna, described control communication unit, Transmit Receive Unit adopt discrete component, be arranged on the circuit board, circuit board is arranged in the casing.
Casing volume of the present utility model is no more than 93.2mm * 59.0mm * 12.8mm.
Control communication unit of the present utility model is made of single-chip microcomputer, the RS232 interface that is connected with single-chip microcomputer, USB interface and 5V direct supply interface.
Transmit Receive Unit of the present utility model is made of oscillator, amplitude shift keying modulator, prime amplifier, power amplifier, microstrip line phase shift network and receiving demodulation circuit.
Oscillator of the present utility model is a Colpitts oscillation circuit.
Two detection tubes that receiving demodulation circuit of the present utility model adopts the microstrip line phase shift network to connect constitute.
Demodulation signal processing circuit of the present utility model adopts discrete device, and an operational amplifier and a comparer are electrically connected to form.
Described antenna of the present utility model adopts the thread wire antenna of AWG-18 electronics of 8.2cm length.
Single-chip microcomputer of the present utility model adopts LM3S3739-IQC50, oscillatory circuit adopts the AT31033 chip, modulator adopts MMBT3906LT1 and MMBT3904LT1 chip, prime amplifier adopts the AT31033 chip, power amplifier input signal power 0dBm, output signal are enlarged into 18dBm, and the microstrip line phase shift network adopts FR-4PCB, and detection tube adopts HSMS-2822, operational amplifier adopts SGM722, and comparer adopts LMX331.
The cable packages of circuit board of the present utility model, antenna and connecting circuit plate and antenna is in casing, and synthetic one cable of the line of power lead, RS232 serial ports, USB interface is drawn by a perforate on the casing.
The utility model compared with prior art, adopt discrete component, module for reading and writing and antenna constitute integral structure, volume is no more than 93.2mm * 59.0mm * 12.8mm, realize miniaturization, integrated on the structure, install easily, at the cost that guarantees to greatly reduce on the reliable and stable basis of reader performance the RFID reader.
Description of drawings
Fig. 1 is a complete machine structure block diagram of the present utility model.
Fig. 2 is a complete machine functional frame composition of the present utility model.
Fig. 3 is oscillator of the present utility model, amplitude shift keying ASK modulator circuit figure.
Fig. 4 is receiving demodulation circuit figure of the present utility model.
Fig. 5 is a demodulation signal processing circuit diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.As shown in Figure 1, the integrated RFID reader of UHF of the present utility model is electrically connected to form in proper order by communication control unit, Transmit Receive Unit and antenna.
Described communication control unit, Transmit Receive Unit adopt discrete component, are arranged on the circuit board.The cable packages of circuit board, antenna and connecting circuit plate and antenna is in casing, and synthetic one cable of the line of power lead, RS232 serial ports, USB interface is drawn by a perforate on the casing.The casing volume is no more than 93.2mm * 59.0mm * 12.8mm.
Described communication control unit is made of single-chip microcomputer, the RS232 interface that is connected with single-chip microcomputer, USB interface and 5V direct supply interface.Single-chip microcomputer adopts ARM Cortex-M3 kernel LM3S3739-IQC50.The core of communication control unit is a single-chip microcomputer, is used for coded signal output, to the ASK modulation of radio-frequency carrier, to receiving the data communication that code check is judged, realized reader and host computer of separating of electronic tag data signal.
As shown in Figure 2, described Transmit Receive Unit is made of oscillator, amplitude shift keying ASK modulator, prime amplifier, power amplifier, microstrip line phase shift network and receiving demodulation circuit.Prime amplifier adopts discrete device, and its input signal power-5dBm, output signal are enlarged into 0dBm.Power amplifier adopts discrete device, and its input signal power 0dBm, output signal are enlarged into 18dBm.
As shown in Figure 3, oscillator is typical Colpitts oscillation circuit, produces the local oscillated signal of 920-930MHz, adopts the AT31033 chip.The ASK modulator adopts discrete device MMBT3906LT1 and MMBT3904LT1 chip, forms the output of on-off circuit control amplifying signal, forms amplitude shift keying ASK modulator.Prime amplifier adopts the AT31033 chip.
As shown in Figure 4, the receiving demodulation circuit input end is local oscillated signal and antenna receiving signal, and output terminal is a differential pair signal, and two detection tubes that adopt the microstrip line phase shift network to connect constitute.The microstrip line phase shift network adopts the FR-4PCB substrate of Shenzhen City YuanWangGu Information Technology Co., Ltd, live width 0.5mm, and line length 46mm is made into 90-degree phase shifter, and two detection tubes adopt HSMS-2822.
As shown in Figure 5, the demodulation signal processing circuit adopts discrete device, and radiofrequency signal enters detection tube through the microstrip line phase shift network and obtains restituted signal, inputs to comparer after amplifying through operational amplifier, is converted to digital signal.Operational amplifier adopts SGM722, is used for small-signal and amplifies, and the differential pair signal that demodulates is amplified, improve signal quality, comparer adopts LMX331, finishes the waveform integer and exports the stable base-band data signal of one road high-low level rule, is convenient to single-chip microcomputer and separates the code check judgement.
Described antenna adopts the thread wire antenna of AWG-18 electronics of 8.2cm length.
The integrated RFID reader of this UHF during use just can be finished reading of electronic tag data with electronic tag near this reader after powering on, and institute's read data is delivered to data center by RS232 serial ports or USB oral instructions.
As shown in Figure 2, principle of work of the present utility model is: oscillator produces the local oscillated signal of 920MHz-930MHz, produces amplitude modulation(PAM) ASK signal by the modulation signal modulation back that comes from single-chip microcomputer.Amplify the back by the microstrip line phase shift network antenna of feeding through prime amplifier, power amplifier, realize reader with RF energy and data message radiation to electronic tag.When receiving the electronic tag return signal, local oscillated signal promotes the demodulation carrier wave of back as received signal by ASK modulator and power amplifier, demodulate differential pair signal through microstrip line phase shift network and two detection tubes, give the single-chip microcomputer decoding by the comparer shaping after this differential signal process amplifier processing and amplifying, finish the process of whole reception label signal.
The HF read write line that the utility model generally uses at prior art is to reading tag distance and the not high occasion of rate requirement, has price advantage, the reading tag distance is controlled at 5cm to 30cm, can replace the HF read write line fully, also can compatibility read the UHF electronic tag, because the size of UHF electronic tag is littler than HF electronic tag size, easy to carry, for the application of occasions such as attendance checking system gate control system provides powerful technical support, cost is low, has the bigger advantage of applying.
Claims (10)
1. integrated RFID reader of UHF, be electrically connected to form in proper order by control communication unit, Transmit Receive Unit and antenna, it is characterized in that: described control communication unit, Transmit Receive Unit adopt discrete component, are arranged on the circuit board, and circuit board is arranged in the casing.
2. the integrated RFID reader of UHF according to claim 1 is characterized in that: described casing volume is no more than 93.2mm * 59.0mm * 12.8mm.
3. the integrated RFID reader of UHF according to claim 2 is characterized in that: described control communication unit is made of single-chip microcomputer, the RS232 interface that is connected with single-chip microcomputer, USB interface and 5V direct supply interface.
4. the integrated RFID reader of UHF according to claim 3 is characterized in that: described Transmit Receive Unit is made of oscillator, amplitude shift keying modulator, prime amplifier, power amplifier, microstrip line phase shift network and receiving demodulation circuit.
5. the integrated RFID reader of UHF according to claim 4 is characterized in that: described oscillator is a Colpitts oscillation circuit.
6. the integrated RFID reader of UHF according to claim 5 is characterized in that: two detection tubes that described receiving demodulation circuit adopts the microstrip line phase shift network to connect constitute.
7. the integrated RFID reader of UHF according to claim 6 is characterized in that: described demodulation signal processing circuit adopts discrete device, and an operational amplifier and a comparer are electrically connected to form.
8. the integrated RFID reader of UHF according to claim 7 is characterized in that: described antenna adopts the thread wire antenna of AWG-18 electronics of 8.2cm length.
9. the integrated RFID reader of UHF according to claim 8, it is characterized in that: described single-chip microcomputer adopts LM3S3739-IQC50, oscillatory circuit adopts the AT31033 chip, modulator adopts MMBT3906LT1 and MMBT3904LT1 chip, prime amplifier adopts the AT31033 chip, power amplifier input signal power 0dBm, output signal are enlarged into 18dBm, the microstrip line phase shift network adopts FR-4PCB, detection tube adopts HSMS-2822, operational amplifier adopts SGM722, and comparer adopts LMX331.
10. the integrated RFID reader of UHF according to claim 9, it is characterized in that: the cable packages of described circuit board, antenna and connecting circuit plate and antenna is in casing, and synthetic one cable of the line of power lead, RS232 serial ports, USB interface is drawn by a perforate on the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202661862U CN201716739U (en) | 2010-07-21 | 2010-07-21 | Small ultra-high frequency integral RFID reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202661862U CN201716739U (en) | 2010-07-21 | 2010-07-21 | Small ultra-high frequency integral RFID reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201716739U true CN201716739U (en) | 2011-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202661862U Expired - Lifetime CN201716739U (en) | 2010-07-21 | 2010-07-21 | Small ultra-high frequency integral RFID reader |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177275A (en) * | 2013-03-26 | 2013-06-26 | 国家电网公司 | RFID (Radio Frequency Identification Devices)-based identification system |
| CN103729668A (en) * | 2014-01-14 | 2014-04-16 | 北京工业大学 | Multi-interface protocol communication supported ultrahigh frequency RFID (Radio Frequency Identification) reader-writer |
| CN106203213A (en) * | 2016-07-01 | 2016-12-07 | 恒东信息科技无锡有限公司 | A kind of intelligent channel system and method read at a distance based on RFID |
| CN107145812A (en) * | 2017-06-02 | 2017-09-08 | 成都飞凯瑞科技有限公司 | A kind of read write line based on discrete device |
| CN107194298A (en) * | 2017-06-02 | 2017-09-22 | 成都飞凯瑞科技有限公司 | A kind of RFID high frequencies read write line |
| CN107392071A (en) * | 2017-06-27 | 2017-11-24 | 苏州沃古斯电子商务有限公司 | A kind of novel ultra-high frequency reader |
| CN108154697A (en) * | 2017-12-27 | 2018-06-12 | 北斗导航科技有限公司 | Public transport based on active RFID technology is arrived at a station detection method and system |
-
2010
- 2010-07-21 CN CN2010202661862U patent/CN201716739U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103177275A (en) * | 2013-03-26 | 2013-06-26 | 国家电网公司 | RFID (Radio Frequency Identification Devices)-based identification system |
| CN103729668A (en) * | 2014-01-14 | 2014-04-16 | 北京工业大学 | Multi-interface protocol communication supported ultrahigh frequency RFID (Radio Frequency Identification) reader-writer |
| CN106203213A (en) * | 2016-07-01 | 2016-12-07 | 恒东信息科技无锡有限公司 | A kind of intelligent channel system and method read at a distance based on RFID |
| CN107145812A (en) * | 2017-06-02 | 2017-09-08 | 成都飞凯瑞科技有限公司 | A kind of read write line based on discrete device |
| CN107194298A (en) * | 2017-06-02 | 2017-09-22 | 成都飞凯瑞科技有限公司 | A kind of RFID high frequencies read write line |
| CN107392071A (en) * | 2017-06-27 | 2017-11-24 | 苏州沃古斯电子商务有限公司 | A kind of novel ultra-high frequency reader |
| CN108154697A (en) * | 2017-12-27 | 2018-06-12 | 北斗导航科技有限公司 | Public transport based on active RFID technology is arrived at a station detection method and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110119 |