CN108062494B - Split ultrahigh frequency reader-writer - Google Patents
Split ultrahigh frequency reader-writer Download PDFInfo
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- CN108062494B CN108062494B CN201711362289.1A CN201711362289A CN108062494B CN 108062494 B CN108062494 B CN 108062494B CN 201711362289 A CN201711362289 A CN 201711362289A CN 108062494 B CN108062494 B CN 108062494B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10366—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications
- G06K7/10415—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications the interrogation device being fixed in its position, such as an access control device for reading wireless access cards, or a wireless ATM
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- General Health & Medical Sciences (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a split type ultrahigh frequency reader-writer, which comprises a reader-writer radio frequency unit, a reader-writer control unit, a vertical rod and a cross rod, wherein the vertical rod is used for installing the reader-writer control unit; the reader-writer radio frequency unit is divided into a reader-writer radio frequency unit A, a reader-writer radio frequency unit B, a reader-writer radio frequency unit C and a reader-writer radio frequency unit D; the reader-writer radio frequency unit A, the reader-writer radio frequency unit B, the reader-writer radio frequency unit C and the reader-writer radio frequency unit D are respectively connected with the reader-writer control unit through multi-core cables. This split type hyperfrequency read write line through the structure that sets up multicore cable, has reached and has replaced the coaxial feeder of original radio frequency, has reduced cable cost and system cost.
Description
Technical Field
The invention relates to the technical field of short-range wireless communication, in particular to a split type ultrahigh frequency reader-writer.
Background
The ultrahigh Frequency RFID (radio Frequency identification) technology is a communication technology of accessories working in a 900MHz Frequency band, works in a mode of transmitting a carrier wave to provide energy for a passive tag through a reader-writer, and has the characteristics of low tag cost, long communication distance and the like compared with high-Frequency and microwave communication. More and more are applied to the fields of logistics, storage, transportation and the like. The transmitting power of the traditional high-power reader-writer can reach 1W, the traditional high-power reader-writer is matched with an antenna with the length of more than 12dBi, and the communication distance of the traditional high-power reader-writer can reach more than 40 m. When the multi-channel encryption device is applied to multiple regions, particularly traffic pavements, the reader-writer has the requirements of multiple channels and safety encryption. At present, the ultrahigh frequency RFID industry standard of the traffic industry is released, and all applications must be matched with a specific encryption module for use. In actual engineering deployment, the deployment of a multi-channel switching mode is often difficult to meet the requirement of high-speed traffic, meanwhile, the construction requirement of a radio frequency cable from a reader-writer to an antenna is higher, the power loss of the cable is larger (generally 15m), the cost is higher, and an ultrahigh frequency reader-writer with convenient arrangement and low arrangement cost is urgently needed. Therefore, we propose a split type ultrahigh frequency reader-writer
Disclosure of Invention
The present invention is directed to a split type ultrahigh frequency reader/writer, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a split type ultrahigh frequency reader-writer comprises a reader-writer radio frequency unit, a reader-writer control unit, a vertical rod and a cross rod, wherein the vertical rod is used for installing the reader-writer control unit, the cross rod is used for installing the reader-writer radio frequency unit, one end of the vertical rod is fixedly and vertically installed on the ground, and the other end of the vertical rod is vertically connected with the cross rod; the reader-writer radio frequency unit is divided into a reader-writer radio frequency unit A, a reader-writer radio frequency unit B, a reader-writer radio frequency unit C and a reader-writer radio frequency unit D; the reader-writer radio frequency unit A, the reader-writer radio frequency unit B, the reader-writer radio frequency unit C and the reader-writer radio frequency unit D are respectively connected with the reader-writer control unit through multi-core cables;
the reader-writer radio frequency unit comprises an antenna unit, an antenna feeder unit, a frequency synthesis unit, a cancellation unit, a receiving, adjusting and modulating unit, a transmitting and modulating unit, a power amplification unit, a slave processor unit and a slave power supply unit; the slave processor unit is powered by the slave power supply unit, the slave processor unit is connected with the frequency synthesis unit and the offset unit, the output end of the frequency synthesis unit is connected with the input ends of the receiving, adjusting and modulating unit and the transmitting and modulating unit, the output end of the transmitting and modulating unit is connected with the input end of the power amplifying unit, the output end of the power amplifying unit is connected with the input ends of the offset unit and the antenna feed unit, the output end of the offset unit is connected with the input end of the antenna feed unit, the output end of the antenna feed unit is connected with the input end of the receiving, adjusting and modulating unit, and the antenna feed unit is also connected with the;
the reader-writer control unit comprises an Ethernet switching unit, a main processor unit, a digital signal processing unit, a security encryption unit, a first analog-to-digital conversion unit, a second analog-to-digital conversion unit and a main power supply unit; the main processor unit supplies power through a main power supply unit, and the main power supply unit supplies power through an external input interface of the reader-writer control unit; the Ethernet switching unit is connected with the slave processor unit through a multi-core cable; the main processor unit is electrically connected with the digital signal processing unit, the digital signal processing unit is electrically connected with the safety encryption unit, the input end of the digital signal processing unit is connected with the first analog-to-digital conversion unit, and the first analog-to-digital conversion unit is connected with the receiving, adjusting and adjusting unit through a multi-core cable to receive baseband signals; the output end of the digital signal processing unit is connected with the second analog-to-digital conversion unit, and the second analog-to-digital conversion unit is connected with the emission modulation unit through a multi-core cable to emit baseband signals.
Preferably, the master power supply unit and the slave power supply unit are respectively a combination of a plurality of DC/DC conversion circuits and LDO conversion circuits; the main power supply unit provides voltage input for the auxiliary power supply unit in a POE mode.
Preferably, the inside of the main processor unit is connected with the ethernet switching unit through an MII interface and communicates with the background server by means of the ethernet switching unit and the reader radio frequency unit; the main processor unit communicates with the digital signal processing unit through the bus to acquire data communicated with the tag.
Preferably, the reader-writer radio frequency unit performs zooming out by baseband analog differential current signals and a POE mode.
Preferably, the digital signal processing unit completes parallel processing of the radio frequency units of the plurality of readers through the FPGA.
Compared with the prior art, the invention has the beneficial effects that: the split ultrahigh frequency reader-writer improves the working efficiency of the ultrahigh frequency reader-writer through a parallel multi-channel processing structure; by arranging the radio frequency circuit antenna integrated structure, the effect of eliminating construction requirements related to a radio frequency feeder is achieved, so that the requirements on construction are reduced; through the structure that sets up multicore cable, reached and replaced original radio frequency coaxial feeder, reduced cable cost and system cost.
Drawings
FIG. 1 is a schematic diagram of the deployment of a separated UHF reader/writer according to the present invention;
fig. 2 is a system block diagram of a control unit and a radio frequency unit according to the present invention.
In the figure: the system comprises a reader-writer radio frequency unit 1, an antenna unit 11, an antenna feeder unit 12, a frequency synthesis unit 13, a cancellation unit 14, a receiving and adjusting unit 15, a transmitting and modulating unit 16, a power amplification unit 17, a slave processor unit 18, a slave power supply unit 19, a reader-writer control unit 2, an Ethernet exchange unit 21, a master processor unit 22, a digital signal processing unit 23, a security encryption unit 24, a first analog-to-digital conversion unit 25, a second analog-to-digital conversion unit 26, a main power supply unit 27, a multi-core cable 3, a cross bar 4 and a vertical bar 5.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a split type ultrahigh frequency reader-writer comprises a reader-writer radio frequency unit 1, a reader-writer control unit 2, a vertical rod 5 for mounting the reader-writer control unit 2 and a cross rod 4 for mounting the reader-writer radio frequency unit 1, wherein one end of the vertical rod 5 is fixedly and vertically mounted on the ground, and the other end of the vertical rod 5 is vertically connected with the cross rod 4; the reader-writer radio frequency unit 1 is divided into a reader-writer radio frequency unit A, a reader-writer radio frequency unit B, a reader-writer radio frequency unit C and a reader-writer radio frequency unit D; the reader-writer radio frequency unit A, the reader-writer radio frequency unit B, the reader-writer radio frequency unit C and the reader-writer radio frequency unit D are respectively connected with the reader-writer control unit 2 through multi-core cables 3.
The reader-writer radio frequency unit 1 comprises an antenna unit 11, an antenna feeder unit 12, a frequency synthesis unit 13, a cancellation unit 14, a receiving modulation and demodulation unit 15, a transmitting modulation unit 16, a power amplification unit 17, a slave processor unit 18 and a slave power supply unit 19, wherein the reader-writer radio frequency unit 1 is subjected to remote extension in a baseband analog differential current signal and POE mode; the slave processor unit 18 is powered by the slave power supply unit 19, the slave processor unit 18 is connected with the frequency synthesis unit 13 and the cancellation unit 14, the output end of the frequency synthesis unit 13 is connected with the input ends of the receiving modulation unit 15 and the transmitting modulation unit 16, the output end of the transmitting modulation unit 16 is connected with the input end of the power amplification unit 17, the output end of the power amplification unit 17 is connected with the input ends of the cancellation unit 14 and the antenna feed unit 12, the output end of the cancellation unit 14 is connected with the input end of the antenna feed unit 12, the output end of the antenna feed unit 12 is connected with the input end of the receiving modulation unit 15, the antenna feed unit 12 is also connected with the antenna unit 11 in a bidirectional mode (it is noted that the antenna unit 11 is of a relatively independent structure and is a radio frequency circuit board parallel to the antenna unit 11), and the antenna feed unit 12 is wirelessly.
The antenna unit 11 is used for radiating and receiving radio frequency signals, is different from a traditional architecture, and is an integrated structure of a radio frequency transceiver antenna. The middle long radio frequency cable is removed, the requirements of engineering construction are greatly improved, and the utilization rate of the power amplifier is improved.
The core of the antenna feed unit 12 is a circulator with transmission directivity, the transmitted signal is transmitted to the antenna units in the transmission time slot, and the transmitted carrier and the received signal are separated according to the directivity in the receiving time slot.
The frequency synthesis unit 13 is a low phase noise rf pll chip, and is controlled by the slave processor unit to provide local oscillation signals required for modulation and demodulation to the rf circuit.
The cancellation unit 14, the transmission power amplification unit 17 and the receiving demodulation unit 15 are connected to cancel the carrier signal leaked from the transmission coupling carrier signal through phase and amplitude adjustment, so as to improve the signal-to-noise ratio of the received signal. Compared with the traditional antenna remote reader-writer, the antenna and antenna feeder integrated structure has a smaller leakage value, is good in consistency, is not influenced by a construction cable, and is higher in cancellation speed and better in effect.
And the receiving demodulation unit 15 is used for demodulating and amplifying the received reverse signal, converting the received baseband voltage signal into a differential current signal for reducing interference and zooming out, and transmitting the differential current signal to the control unit.
And the transmitting modulation unit 16 is used for converting the transmitting baseband current signal transmitted by the control unit into a voltage signal, amplifying and filtering the voltage signal, and modulating the amplified voltage signal into a transmitting signal through a modulator.
And the transmission power amplifying unit 17 is used for performing amplitude control and amplification on the transmission signal, and coupling out part of energy for carrier cancellation. Compared with the traditional high-power antenna remote reader-writer, the antenna multi-channel change-over switch is omitted, the loss of the long radio frequency cable is reduced, and the actual radiation efficiency is at least doubled. Only a small power amplifier is required to meet the requirements. Greatly reduces the proportion of the heat consumption and the cost of the power amplifier in the whole system.
From the power supply unit 19, the POE power is extracted and converted into the voltage required by the rf unit, which is a combination of a plurality of switching voltage converters DCDC and linear voltage converters LDO.
The slave processor unit 18, the core of which is a high-speed single chip, communicates with the control unit through the network port, is responsible for the functions of the phase-locked loop configuration, the transmission power adjustment, the carrier cancellation control and the like of the radio frequency unit, and does not participate in the signal processing process with high real-time requirement.
The reader/writer control unit 2 includes an ethernet switching unit 21, a main processor unit 22, a digital signal processing unit 23, a security encryption unit 24, a first analog-to-digital conversion unit 25, a second analog-to-digital conversion unit 26, and a main power supply unit 27; the main processor unit 22 supplies power through a main power supply unit 27, and the main power supply unit 27 supplies power through an external input interface of the reader-writer control unit 2; the main processor unit 22 is electrically connected with the ethernet switching unit 21, and the ethernet switching unit 21 is connected with the slave processor unit 18 through the multi-core cable 3; the main processor unit 22 is electrically connected with the digital signal processing unit 23, the digital signal processing unit 23 is electrically connected with the security encryption unit 24, the input end of the digital signal processing unit 23 is connected with the first analog-to-digital conversion unit 25, and the first analog-to-digital conversion unit 25 is connected with the receiving modem unit 15 through the multi-core cable 3 to receive baseband signals; the output end of the digital signal processing unit 23 is connected to the second analog-to-digital converting unit 26, and the second analog-to-digital converting unit 26 is connected to the transmission modulating unit 16 through the multi-core cable 3 to transmit the baseband signal.
A main power supply unit 27 that converts an input voltage into a direct-current voltage; the master power supply unit 27 and the slave power supply unit 19 are combinations of a plurality of DC/DC conversion circuits and LDO conversion circuits, respectively; the main power supply unit 27 supplies a voltage input to the slave power supply unit 19 by way of POE, and supplies various specifications of voltages required for different circuits.
The core of the main processor unit 22 is a processor with multithread processing capability, and can process a plurality of processes in parallel, the inside of the main processor unit 22 is connected with the Ethernet switching unit 21 through an MII interface, and communicates with a background server by the Ethernet switching unit 21 and the reader-writer radio frequency unit 1, so that the radio frequency unit is controlled to interact with a background middleware; the main processor unit 22 communicates with the digital signal processing unit 23 through a bus, and acquires data communicated with the tag.
The ethernet switching unit 21 is a module with the POE function and ethernet switching function, and is responsible for the ethernet communication between the controller unit and the radio frequency unit; the assisting processor unit controls communication to the radio frequency unit. Because the number of control commands to be processed is small, a hundred mega Ethernet using two sets of twisted pairs is sufficient.
And the safety encryption unit 24 is connected with the digital signal processing unit and participates in the authentication encryption process in the protocol processing process. In different applications, the module can be different types, such as an automobile electronic identification application, and a safety module of a public security department corresponds to the application; in the national standard application, the corresponding is an encrypted PSAM card.
The core of the digital signal processing unit 23 is a field programmable logic array FPGA, and the digital signal processing unit 23 completes parallel processing of the plurality of reader-writer radio frequency units 1 through the FPGA. Connected to the main processor unit 22 via a bus. The signals of a plurality of channels can be processed in parallel, and generally 4 channels are used according to actual conditions. In the transmitting time slot, the receiving unit is used for generating a transmitted baseband signal and converting the baseband signal into an analog signal through the digital-to-analog conversion unit; acquiring a digitized baseband signal through an analog-to-digital conversion unit at the same time of receiving a time slot, and carrying out filtering demodulation; in the whole protocol processing process, the system is also responsible for interacting with the security encryption module and completing authentication encryption work in a matching way.
The first digital-to-analog conversion unit 25, which is a multi-channel DAC, or a combination of multiple DACs, corresponds to the maximum number of rf units supported by the system. And the radio frequency unit is connected with the digital signal processing unit and is used for converting the digital signal into an analog signal and carrying out filtering amplification. In order to facilitate remote operation, signals are converted into differential current signals for transmission, and compared with voltage signals, the signal transmission device has the characteristics of interference resistance and long distance.
The second analog-to-digital conversion unit 26 is a multi-channel ADC, or a combination of multiple ADCs, and the number of ADCs corresponds to the maximum number of rf units supported by the system. And the radio frequency unit is connected with the radio frequency unit and is used for converting the analog signal into a digital signal and carrying out filtering amplification.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a split type hyperfrequency read write line, includes read write line radio frequency unit (1) and read write line control unit (2), its characterized in that: the device is characterized by also comprising a vertical rod (5) for mounting the reader-writer control unit (2) and a cross rod (4) for mounting the reader-writer radio frequency unit (1), wherein one end of the vertical rod (5) is fixedly and vertically mounted on the ground, and the other end of the vertical rod (5) is vertically connected with the cross rod (4); the reader-writer radio frequency unit (1) is divided into a reader-writer radio frequency unit A, a reader-writer radio frequency unit B, a reader-writer radio frequency unit C and a reader-writer radio frequency unit D; the reader-writer radio frequency unit A, the reader-writer radio frequency unit B, the reader-writer radio frequency unit C and the reader-writer radio frequency unit D are respectively connected with the reader-writer control unit (2) through multi-core cables (3);
the reader-writer radio frequency unit (1) comprises an antenna unit (11), an antenna feeder unit (12), a frequency synthesis unit (13), a cancellation unit (14), a receiving modulation and demodulation unit (15), a transmitting modulation unit (16), a power amplification unit (17), a slave processor unit (18) and a slave power supply unit (19); the slave processor unit (18) is powered by the slave power supply unit (19), the slave processor unit (18) is connected with the frequency synthesis unit (13) and the cancellation unit (14) in an interconnection mode, the output end of the frequency synthesis unit (13) is connected with the input ends of the receiving modulation unit (15) and the transmitting modulation unit (16), the output end of the transmitting modulation unit (16) is connected with the input end of the power amplification unit (17), the output end of the power amplification unit (17) is connected with the input ends of the cancellation unit (14) and the antenna feed unit (12), the output end of the cancellation unit (14) is connected with the input end of the antenna feed unit (12), the output end of the antenna feed unit (12) is connected with the input end of the receiving modulation unit (15), and the antenna feed unit (12) is also connected with the antenna unit (11) in a bidirectional mode;
the reader-writer control unit (2) comprises an Ethernet switching unit (21), a main processor unit (22), a digital signal processing unit (23), a security encryption unit (24), a first analog-to-digital conversion unit (25), a second analog-to-digital conversion unit (26) and a main power supply unit (27); the main processor unit (22) supplies power through a main power supply unit (27), and the main power supply unit (27) supplies power through an external input interface of the reader-writer control unit (2); the main processor unit (22) is electrically connected with the Ethernet switching unit (21), and the Ethernet switching unit (21) is connected with the slave processor unit (18) through a multi-core cable (3); the main processor unit (22) is electrically connected with the digital signal processing unit (23), the digital signal processing unit (23) is electrically connected with the safety encryption unit (24), the input end of the digital signal processing unit (23) is connected with the first analog-to-digital conversion unit (25), and the first analog-to-digital conversion unit (25) is connected with the receiving, adjusting and modulating unit (15) through the multi-core cable (3) to receive baseband signals; the output end of the digital signal processing unit (23) is connected with a second analog-to-digital conversion unit (26), and the second analog-to-digital conversion unit (26) is connected with the emission modulation unit (16) through a multi-core cable (3) to emit baseband signals.
2. The split uhf reader/writer according to claim 1, wherein: the master power supply unit (27) and the slave power supply unit (19) are a combination of a plurality of DC/DC conversion circuits and LDO conversion circuits, respectively; the master power supply unit (27) provides a voltage input to the slave power supply unit (19) by way of POE.
3. The split uhf reader/writer according to claim 1, wherein: the interior of the main processor unit (22) is connected with the Ethernet switching unit (21) through an MII interface and communicates with the background server by means of the Ethernet switching unit (21) and the reader-writer radio frequency unit (1); the main processor unit (22) communicates with the digital signal processing unit (23) through the bus, and acquires data communicated with the tag.
4. The split uhf reader/writer according to claim 1, wherein: the reader-writer radio frequency unit (1) performs zooming out in a baseband analog differential current signal and POE mode.
5. The split uhf reader/writer according to claim 1, wherein: the digital signal processing unit (23) completes parallel processing of the plurality of reader-writer radio frequency units (1) through the FPGA.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711362289.1A CN108062494B (en) | 2017-12-18 | 2017-12-18 | Split ultrahigh frequency reader-writer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711362289.1A CN108062494B (en) | 2017-12-18 | 2017-12-18 | Split ultrahigh frequency reader-writer |
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| CN108062494A CN108062494A (en) | 2018-05-22 |
| CN108062494B true CN108062494B (en) | 2021-01-29 |
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| CN201711362289.1A Active CN108062494B (en) | 2017-12-18 | 2017-12-18 | Split ultrahigh frequency reader-writer |
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| CN112800790A (en) * | 2021-01-14 | 2021-05-14 | 杭州荣旗科技有限公司 | UHF reader-writer capable of automatically adjusting power consumption |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201057561Y (en) * | 2007-04-17 | 2008-05-07 | 深圳市远望谷信息技术股份有限公司 | Fixed radio frequency reader-writer |
| CN201212999Y (en) * | 2008-06-26 | 2009-03-25 | 桂林瀚特信息产业有限公司 | Ultra-high frequency RFID label reader/writer |
| CN102236804A (en) * | 2010-04-23 | 2011-11-09 | 北京烽火联拓科技有限公司 | Reader-writer |
| CN203192015U (en) * | 2013-04-24 | 2013-09-11 | 重庆天健互联网出版有限责任公司 | Novel radio frequency identification system |
| CN206312184U (en) * | 2016-07-11 | 2017-07-07 | 云南昆船数码科技有限公司 | A kind of mobile RFID reader station |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008135003A (en) * | 2006-10-31 | 2008-06-12 | Yoshikawa Rf System Kk | Data carrier and data carrier system |
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2017
- 2017-12-18 CN CN201711362289.1A patent/CN108062494B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201057561Y (en) * | 2007-04-17 | 2008-05-07 | 深圳市远望谷信息技术股份有限公司 | Fixed radio frequency reader-writer |
| CN201212999Y (en) * | 2008-06-26 | 2009-03-25 | 桂林瀚特信息产业有限公司 | Ultra-high frequency RFID label reader/writer |
| CN102236804A (en) * | 2010-04-23 | 2011-11-09 | 北京烽火联拓科技有限公司 | Reader-writer |
| CN203192015U (en) * | 2013-04-24 | 2013-09-11 | 重庆天健互联网出版有限责任公司 | Novel radio frequency identification system |
| CN206312184U (en) * | 2016-07-11 | 2017-07-07 | 云南昆船数码科技有限公司 | A kind of mobile RFID reader station |
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