CN103699917A - RFID (radio frequency identification device) decoupled compact rack - Google Patents
RFID (radio frequency identification device) decoupled compact rack Download PDFInfo
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Abstract
The invention relates to the field of a file management device based on the radio frequency identification technology, in particular to an RFID (radio frequency identification device) decoupled compact rack which can effectively prevent the coupling effect of multiple layers and multiple compact rack bodies, reduce the omission factor and improve the file management efficiency. The RFID decoupled compact rack comprises a rack body and a radio frequency reader-writer, wherein more than two transverse separation plates for dividing the rack body into multiple layers are arranged on the rack body, and the RFID decoupled compact rack is characterized in that each transverse separation plate is made of a metal material, each transverse separation plate is provided with a radio frequency antenna, and each radio frequency antenna is connected with the radio frequency reader-writer. Compared with the prior art, by adopting a baseplate antenna form and an antenna matching method, no coupling between every two adjacent layers, front surface and rear surface and two adjacent rack bodies of the compact rack is realized, and the RFID decoupled compact rack has the advantages of no harassment in reading, cascading ability, low cost and the like.
Description
Technical field
The present invention relates to the document management apparatus field based on REID, the loss of a kind of coupling effect that can effectively avoid between multilayer, a plurality of intensive support body, and then reduction specifically, improves the RFID of document management efficiency without coupling compact shelving.
Background technology
In recent years, files in China cause has obtained significant progress, and the scale expanding day of archives undertaking is also more and more stricter to the requirement of file administration.For the archives in compact shelving are accurately managed, progressively adopted RFID (radio-frequency (RF) identification, Radio Frequency Identification) technology realizes, RFID claims again radio frequency identification, is a kind of communication technology, can be identified specific objective and be read and write related data by radio signals, adopt REID can realize automatically searching, make an inventory and locating of archives, realize the intelligent management of archives, saved a large amount of manpowers, improved the efficiency of file administration.
Existing compact shelving adopts the form of erectting antenna more, and compact shelving is two-sided, is called above and the back side, and every layer of compact shelving placed a plurality of dividing plates, and antenna is embedded in dividing plate, realizes reading filing container.But because antenna adopts the placement form of erectting, the labeling rule of label adopts the direction with day line parallel, this kind of mode inevitably causes compact shelving between layers, before and between the back side, between adjacent support body, there is coupling phenomenon, and the main power match mode that adopts of antenna matching part in prior art, when antenna is not worked, aerial coil can form a closed-loop path by adaptation, when adjacent antenna is worked, idle antenna also may be coupled to radio-frequency (RF) energy, it is inaccurate that these coupled problems all can cause label to detect, alter the problem of reading serious.
Summary of the invention
The present invention is directed to the shortcoming and defect existing in prior art, a kind of raising under the prerequisite of production cost proposed, can effectively avoid the coupling effect between multilayer, a plurality of intensive support body, and then reduce loss, improve the RFID of document management efficiency without coupling compact shelving.
The present invention can reach by following measures:
A kind of RFID is without coupling compact shelving, comprise support body, frequency read/write, support body is provided with two above for support body being divided into the lateral partitions of multilayer, it is characterized in that lateral partitions adopts metal material, lateral partitions is provided with radio-frequency antenna, and radio-frequency antenna is connected with frequency read/write through adaptation.
In the present invention, in frequency read/write, be provided with radiofrequency signal sending/receiving circuit, microcontroller chip, Port Multiplier, wherein microcontroller chip respectively with radiofrequency signal sending/receiving circuit, Port Multiplier is connected, described radiofrequency signal sending/receiving circuit comprises the crystal oscillator for generation of high-frequency signal, the modulation circuit being connected with crystal oscillator output terminal, the power amplification circuit being connected with modulation circuit output terminal, for receiving antenna, send into the envelope detection circuit of information, the demodulation circuit of intermediate frequency being connected with envelope detection circuit output terminal, the comparison decision circuit being connected with demodulation circuit of intermediate frequency output terminal, relatively the output terminal of decision circuit is connected with microcontroller chip, the output terminal of power amplification circuit is connected with the radio-frequency (RF) signal input end of Port Multiplier, in described Port Multiplier, be provided with RF signal switch circuit more than parallel two-way, in Port Multiplier, the output terminal of two above RF signal switch circuit is connected with plural adaptation respectively, the output terminal of adaptation is connected with radio-frequency antenna coil, Port Multiplier is under the control of microcontroller chip, control the break-make of RF signal switch circuit more than two-way, make the radio frequency read-write Jing Mou road RF signal switch circuit that radiofrequency signal transtation mission circuit is sent deliver to adaptation and the radio-frequency antenna that Yu Gai road RF signal switch circuit is connected.
In the present invention, Port Multiplier is also provided with filtering circuit, and filtering circuit is arranged on the front end of RF signal switch circuit, for the radiofrequency signal of input is carried out to filtering decoupling processing.
In the present invention, adaptation comprises the alternating current-direct current turning circuit being connected with Port Multiplier Yi road output terminal, the impedance inverter circuit that input end is connected with the output terminal of Port Multiplier and the output terminal of alternating current-direct current turning circuit respectively, and the resonance match circuit being connected with the output terminal of impedance inverter circuit, wherein in alternating current-direct current turning circuit, be provided with HF switch, receive the antenna control signal that Port Multiplier is sent, when control signal is high level, the conducting of alternating current-direct current turning circuit, when input end is low level, this circuit disconnects, in impedance inverter circuit, be provided with buffer circuit and capacitance-resistance translation circuit, buffer circuit adopts transformer device structure to realize, for realizing input, isolation between output, capacitance-resistance translation circuit is used for Antenna Impedance Matching to 50 ohm, resonance match circuit adopts LC series resonance or LC parallel resonance mode, for radiofrequency signal is matched to 13.56MHz.
In the present invention, radiofrequency signal sending/receiving circuit can be connected with plural Port Multiplier, the control end of each Port Multiplier is all connected with the microcontroller chip in frequency read/write, in each Port Multiplier, be provided with two above RF signal switch circuit, the corresponding matching connection device of every RF signal switch circuit and radio-frequency antenna, by increase Port Multiplier and with it to the adaptation coordinating and radio-frequency antenna, can realize the cascade of multistage intensive rack device.
In the present invention, in lateral partitions, can be provided with two radio-frequency antenna coil that are encapsulated in the horizontal positioned in plate body, for detection of the radio-frequency (RF) tag on the follow-up article that are placed on zones of different in lateral partitions.
Before and after preferably support body being divided in the present invention to two parking spaces, and in each lateral partitions of support body, be provided with accordingly two be respectively used to detect forward and backward space in the radio-frequency antenna of RFID label.
In the present invention, radio-frequency antenna coil can coiling be rectangle.
The present invention compared with prior art, by adopting the method for base plate antenna form and antenna matching, realize compact shelving between layers, above and below, between adjacent support body without coupling, have without altering read, can cascade, low cost and other advantages, specifically comprise: (1) is without coupling, without altering the problem of reading: by adopting base plate antenna form and aerial matching method, and in conjunction with unique tag labeling rule, realized compact shelving between layers, above and between the back side, between adjacent support body without coupling, thereby solved the problem of reading of altering of compact shelving.(2) antenna amount is few, simple in structure: every layer of compact shelving only need be installed two antennas in base plate, before with the back side each one, compare setting antenna form, greatly reduced the quantity of antenna, and do not need antenna to embed in dividing plate, simple in structure, easy for installation; (3) can realize the cascade of more piece compact shelving: the present invention adopts the form of more piece compact shelving cascade, a read write line connects a plurality of Port Multipliers, each Port Multiplier connects a joint compact shelving, the radiofrequency signal that Port Multiplier sends read write line is distributed to every one deck of compact shelving successively, can realize like this stacked antenna of managing a plurality of compact shelvings with a read write line, thereby realize the cascade of more piece compact shelving, realize reading of a large amount of intensive labels; (4) cost-saving: to adopt the form of more piece compact shelving cascade, realize a read write line management more piece compact shelving, compare with the mode that every joint compact shelving is connected a read write line, reduced the quantity of read write line; Adopt the form of base plate antenna, compare with erectting antenna form, reduced the quantity of antenna, and do not needed power splitter, greatly reduce production cost.
accompanying drawing explanation:
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is circuit structure block diagrams of the present invention.
Accompanying drawing 3 is structured flowcharts of adaptation in the present invention.
Accompanying drawing 4 is use view of the present invention.
Accompanying drawing 5 is the circuit structure block diagrams that adopt in the embodiment of the present invention 1.
Reference numeral: support body 1, lateral partitions 2, radio-frequency antenna 3, radiofrequency signal sending/receiving circuit 4, microcontroller chip 5, Port Multiplier 6, adaptation 7, alternating current-direct current turning circuit 8, impedance inverter circuit 9, resonance match circuit 10, radio-frequency (RF) tag 11, host computer 12,
embodiment:
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, the present invention proposes a kind of RFID without coupling compact shelving, comprise support body 1, frequency read/write, support body is provided with two above for support body being divided into the lateral partitions 2 of multilayer, it is characterized in that lateral partitions 2 adopts metal material, lateral partitions is provided with radio-frequency antenna 3, and radio-frequency antenna 3 is connected with frequency read/write through adaptation.
As shown in Figure 2, in the present invention, in frequency read/write, be provided with radiofrequency signal sending/receiving circuit 4, microcontroller chip 5, Port Multiplier 6, wherein microcontroller chip 5 respectively with radiofrequency signal sending/receiving circuit 4, Port Multiplier 6 is connected, the crystal oscillator that described radiofrequency signal sending/receiving circuit 4 comprises for generation of high-frequency signal, the modulation circuit being connected with crystal oscillator output terminal, the power amplification circuit being connected with modulation circuit output terminal, for receiving antenna, send into the envelope detection circuit of information, the demodulation circuit of intermediate frequency being connected with envelope detection circuit output terminal, the comparison decision circuit being connected with demodulation circuit of intermediate frequency output terminal, relatively the output terminal of decision circuit is connected with microcontroller chip, the output terminal of power amplification circuit is connected with the radio-frequency (RF) signal input end of Port Multiplier, in described Port Multiplier 6, be provided with RF signal switch circuit more than parallel two-way, in Port Multiplier, the output terminal of two above RF signal switch circuit is connected with plural adaptation 7 respectively, the output terminal of adaptation 7 is connected with radio-frequency antenna 3 coils, Port Multiplier 6 is under the control of microcontroller chip 5, control the break-make of RF signal switch circuit more than two-way, make the radio frequency read-write Jing Mou road RF signal switch circuit that radiofrequency signal transtation mission circuit is sent deliver to adaptation 7 and the radio-frequency antenna 3 that Yu Gai road RF signal switch circuit is connected.
In the present invention, Port Multiplier 6 is also provided with filtering circuit, and filtering circuit is arranged on the front end of RF signal switch circuit, for the radiofrequency signal of input is carried out to filtering decoupling processing.
As shown in Figure 3, in the present invention, adaptation 7 comprises the alternating current-direct current turning circuit 8 being connected with Port Multiplier 6 Yi road output terminals, the impedance inverter circuit 9 that input end is connected with the output terminal of Port Multiplier 6 and the output terminal of alternating current-direct current turning circuit 8 respectively, and the resonance match circuit 10 being connected with the output terminal of impedance inverter circuit 9, wherein in alternating current-direct current turning circuit 8, be provided with HF switch, receive the antenna control signal that Port Multiplier 6 is sent, when control signal is high level, 8 conductings of alternating current-direct current turning circuit, when input end is low level, this circuit disconnects, in impedance inverter circuit 9, be provided with buffer circuit and capacitance-resistance translation circuit, buffer circuit adopts transformer device structure to realize, for realizing input, isolation between output, capacitance-resistance translation circuit is used for Antenna Impedance Matching to 50 ohm, resonance match circuit 10 adopts LC series resonance or LC parallel resonance mode, for radiofrequency signal is matched to 13.56MHz.
In the present invention, radiofrequency signal sending/receiving circuit 4 can be connected with plural Port Multiplier 6, the control end of each Port Multiplier 6 is all connected with the microcontroller chip 5 in frequency read/write, in each Port Multiplier 6, be provided with two above RF signal switch circuit, the corresponding matching connection device 7 of every RF signal switch circuit and radio-frequency antenna, by increase Port Multiplier 6 and with it to the adaptation coordinating and radio-frequency antenna, can realize the cascade of multistage intensive rack device.
As shown in Figure 4, in the present invention, in lateral partitions 2, can be provided with two radio-frequency antenna 3 coils that are encapsulated in the horizontal positioned in plate body, for detection of the radio-frequency (RF) tag 11 on the follow-up article that are placed on zones of different in lateral partitions 2.
In the present invention, preferably support body 1 is divided into front and back to two parking spaces, and in each lateral partitions 2 of support body 1, be provided with accordingly two be respectively used to detect forward and backward space in the radio-frequency antenna 3 of RFID label, in the present invention, radio-frequency antenna 3 coils can coiling be rectangle.
embodiment 1:
As shown in Figure 5, the present invention proposes a kind of six layers of two-sided RFID without coupling compact shelving, comprise support body, frequency read/write, Port Multiplier, adaptation, base plate antenna, control wire size line a, rf signal line b, communication signal line c, be also provided with the host computer 12 that can communicate through telecommunication circuit with frequency read/write.
Described compact shelving body can be six layers of two-sided compact shelving, and two sides is called above and the back side, and the number of plies of compact shelving body can need to determine according to practical application, is preferably six layers,
Described frequency read/write, input end is connected with host computer 12 by communication signal line, output terminal is connected with Port Multiplier, be used for generating control signal, radiofrequency signal and communication signal, wherein control signal comprises Port Multiplier switch-over control signal and antenna switch-over control signal, and Port Multiplier switch-over control signal directly sends Port Multiplier to, for controlling the break-make of Port Multiplier, antenna switch-over control signal sends adaptation to through Port Multiplier, for the break-make of control antenna; Read write line is the core of whole file administration, controls the flow direction of radiofrequency signal, the break-make of control signal receives the order of host computer, realizes relevant operation; A read write line can connect a plurality of Port Multipliers, and according to the difference of application conditions, attachable Port Multiplier is difference to some extent also.
Described Port Multiplier 6, have two input ends, 12 output terminals, two input ends are control signal input and radiofrequency signal input, are connected respectively by control signal wire with rf signal line with read write line, and 12 output terminals connect respectively above and six adaptations at the back side; The break-make of Port Multiplier is subject to the control of the Port Multiplier switch-over control signal of read write line transmission, and receives the radiofrequency signal sending from read write line, and Jiang Yi road radiofrequency signal converts Shi Er road radiofrequency signal to.
Described adaptation 7, input end is connected with Port Multiplier 6, output terminal is connected with radio-frequency antenna 3, reception is from radiofrequency signal and the antenna switch-over control signal of Port Multiplier 6, Port Multiplier 6, for the break-make of control antenna, sends the energy of radiofrequency signal to antenna, and the coupling of complete twin aerial, reduce radio-frequency (RF) energy reflection, improve the capacity usage ratio of antenna;
In the present invention, a read write line can connect a plurality of Port Multipliers (in the present embodiment being two), each Port Multiplier connects a joint compact shelving, the radiofrequency signal that Port Multiplier sends read write line is distributed to every one deck of compact shelving successively, can realize like this stacked antenna of managing a plurality of compact shelvings with a read write line, thereby realize the cascade of more piece compact shelving, realize reading of a large amount of intensive labels.
embodiment 2:
As shown in Figure 4, the present invention adopts the form of base plate antenna, can realize compact shelving between layers, above and between the back side, between adjacent support body without coupling;
Described radio-frequency antenna is the form of squaerial frame, every layer of compact shelving placed two antennas, before and each, the back side, be called antenna and back side antenna above, two squaerial frames are parallel to each other, and in the parallel hardware that is embedded in lateral partitions or base plate;
During use, filing container is placed on compact shelving lateral partitions or base plate, radio-frequency (RF) tag sticks on the bottom of filing container, plane parallel with the radio-frequency antenna place encapsulating in lateral partitions, and very near apart from antenna place plane, in order to improve, read success ratio, radio-frequency (RF) tag should be placed in the surveyed area of squaerial frame;
The plane parallel at radio-frequency antenna place in radio-frequency (RF) tag and lateral partitions in the present invention, and very near apart from radio-frequency antenna, radio-frequency antenna needs radio-frequency (RF) energy seldom label can be detected, so the radio-frequency (RF) energy that frequency read/write need to send seldom, by controlling the output power of frequency read/write, while guaranteeing upper strata antenna work, lower floor's antenna cannot be coupled to the radio-frequency (RF) energy that upper strata antenna sends; And between the levels antenna of compact shelving, hardware is also installed, the metal material of lateral partitions or base plate can absorb the downward magnetic field of antenna, make lower floor's antenna cannot be coupled to the radio-frequency (RF) energy that upper strata antenna sends, thus realize compact shelving between layers without coupling.
In the present invention, antenna above and the back side antenna of every layer of compact shelving is all embedded in the hardware of lateral partitions or base plate, hardware can absorb the radio-frequency (RF) energy that send in magnetic field, the radio-frequency (RF) energy that antenna and back side antenna send is above limited in antenna frame region separately, during current surface antenna work, back side antenna cannot be coupled to the radio-frequency (RF) energy that antenna sends above, the label at the back side also cannot obtain the radio-frequency (RF) energy that antenna sends above, thus realize compact shelving above and between the back side without coupling effect.
In the present invention, each limit of squaerial frame produces a toroidal magnetic field around this limit, the label of adjacent support body can be detected only in toroidal magnetic field time, because radio-frequency antenna is embedded in the lateral partitions or base plate of metal material, metal can absorb the radio-frequency (RF) energy that send in magnetic field, so antenna place plane is without radio-frequency (RF) energy, the present invention adopts unique tag labeling rule, label is affixed on to the bottom of filing container, very near apart from antenna place plane, so the label of adjacent support body can not be activated, thereby realize between adjacent support body without coupling.
embodiment 3:
As shown in Figure 3, the present invention puies forward the method that adopts antenna matching, can realize compact shelving above and between the back side without coupling; Described Port Multiplier can comprise radio frequency input circuit, control switching circuit and rf output circuit, described radio frequency input circuit, and radiofrequency signal is from frequency read/write, and comprises filtering and isolation circuit; Described control switching circuit, controls each road radio frequency output port, the corresponding HF switch in each road, and control switching circuit, according to Port Multiplier switch-over control signal, determines to open which HF switch, thus the radiofrequency signal conducting of Shi Gai road; Described rf output circuit, controls its break-make by HF switch, and during the conducting of Dang Gai road, radiofrequency signal can export adaptation to.
In the present invention, adaptation adopts the method for antenna matching, compares with traditional power match, and antenna matching is when without antenna switch-over control signal, and aerial coil can not form closed-loop path, so antenna can not transmit radio-frequency (RF) energy.
Described adaptation is mainly comprised of individual part: alternating current-direct current turning circuit, impedance inverter circuit, resonance match circuit, described alternating current-direct current turning circuit, input is connected with Port Multiplier, receives the antenna control signal that Port Multiplier transmits, and in alternating current-direct current turning circuit, is provided with HF switch, according to antenna switch-over control signal, control the break-make of radiofrequency signal, when input end is high level, circuit turn-on, when input end is low level, circuit turn-offs; Described impedance inverter circuit, input is connected with alternating current-direct current turning circuit with Port Multiplier respectively, receive the radiofrequency signal that Port Multiplier transmits, impedance inverter circuit comprises buffer circuit and capacitance-resistance translation circuit, and buffer circuit adopts transformer to realize, with the acting in conjunction of alternating current-direct current conductive path, realize the isolation between input and output, capacitance-resistance translation circuit is provided with resistance and electric capacity, with buffer circuit acting in conjunction, by Antenna Impedance Matching to 50 ohm; Resonance match circuit adopts LC series resonance or LC parallel resonance mode to realize, for radiofrequency signal is matched to 13.56MHz.
In the present invention, every layer of compact shelving comprises two antennas, antenna and back side antenna above, during current surface antenna work, Port Multiplier sends antenna switch-over control signal and radiofrequency signal to adaptation, alternating current-direct current turning circuit conducting in adaptation, radiofrequency signal is sent to antenna above, now back side antenna is not worked, corresponding alternating current-direct current turning circuit disconnects, not conducting of buffer circuit, will input with output and disconnect, and aerial coil can not form closed-loop path, so now back side antenna can not coupling energy, thus realized above and between the back side without coupling.
The present invention compared with prior art, by adopting the method for base plate antenna form and antenna matching, realize compact shelving between layers, above and below, between adjacent support body without coupling, have without altering read, can cascade, low cost and other advantages, specifically comprise: (1) is without coupling, without altering the problem of reading: by adopting base plate antenna form and aerial matching method, and in conjunction with unique tag labeling rule, realized compact shelving between layers, above and between the back side, between adjacent support body without coupling, thereby solved the problem of reading of altering of compact shelving.(2) antenna amount is few, simple in structure: every layer of compact shelving only need be installed two antennas in base plate, before with the back side each one, compare setting antenna form, greatly reduced the quantity of antenna, and do not need antenna to embed in dividing plate, simple in structure, easy for installation; (3) can realize the cascade of more piece compact shelving: the present invention adopts the form of more piece compact shelving cascade, a read write line connects a plurality of Port Multipliers, each Port Multiplier connects a joint compact shelving, the radiofrequency signal that Port Multiplier sends read write line is distributed to every one deck of compact shelving successively, can realize like this stacked antenna of managing a plurality of compact shelvings with a read write line, thereby realize the cascade of more piece compact shelving, realize reading of a large amount of intensive labels; (4) cost-saving: to adopt the form of more piece compact shelving cascade, realize a read write line management more piece compact shelving, compare with the mode that every joint compact shelving is connected a read write line, reduced the quantity of read write line; Adopt the form of base plate antenna, compare with erectting antenna form, reduced the quantity of antenna, and do not needed power splitter, greatly reduce production cost.
Claims (6)
1. a RFID is without coupling compact shelving, comprise support body, frequency read/write, support body is provided with two above for support body being divided into the lateral partitions of multilayer, it is characterized in that lateral partitions adopts metal material, lateral partitions is provided with radio-frequency antenna, and radio-frequency antenna is connected with frequency read/write through adaptation.
2. a kind of RFID according to claim 1 is without coupling compact shelving, it is characterized in that being provided with in frequency read/write radiofrequency signal sending/receiving circuit, microcontroller chip, Port Multiplier, wherein microcontroller chip respectively with radiofrequency signal sending/receiving circuit, Port Multiplier is connected, described radiofrequency signal sending/receiving circuit comprises the crystal oscillator for generation of high-frequency signal, the modulation circuit being connected with crystal oscillator output terminal, the power amplification circuit being connected with modulation circuit output terminal, for receiving antenna, send into the envelope detection circuit of information, the demodulation circuit of intermediate frequency being connected with envelope detection circuit output terminal, the comparison decision circuit being connected with demodulation circuit of intermediate frequency output terminal, relatively the output terminal of decision circuit is connected with microcontroller chip, the output terminal of power amplification circuit is connected with the radio-frequency (RF) signal input end of Port Multiplier, in described Port Multiplier, be provided with RF signal switch circuit more than parallel two-way, in Port Multiplier, the output terminal of two above RF signal switch circuit is connected with plural adaptation respectively, the output terminal of adaptation is connected with radio-frequency antenna coil.
3. a kind of RFID according to claim 1, without coupling compact shelving, is characterized in that Port Multiplier is also provided with filtering circuit, and filtering circuit is connected with the input end of RF signal switch circuit.
4. a kind of RFID according to claim 1 is without coupling compact shelving, it is characterized in that adaptation comprises the alternating current-direct current turning circuit being connected with Port Multiplier Yi road output terminal, the impedance inverter circuit that input end is connected with the output terminal of Port Multiplier and the output terminal of alternating current-direct current turning circuit respectively, and the resonance match circuit being connected with the output terminal of impedance inverter circuit, in impedance inverter circuit, be provided with buffer circuit and capacitance-resistance translation circuit, buffer circuit adopts transformer device structure to realize, and resonance match circuit adopts LC series resonance or LC parallel resonance mode.
5. a kind of RFID according to claim 1 is without coupling compact shelving, it is characterized in that radiofrequency signal sending/receiving circuit is connected with plural Port Multiplier, the control end of each Port Multiplier is all connected with the microcontroller chip in frequency read/write, in each Port Multiplier, be provided with two above RF signal switch circuit, every corresponding matching connection device of RF signal switch circuit and radio-frequency antenna.
6. a kind of RFID according to claim 1, without coupling compact shelving, is characterized in that lateral partitions is provided with two radio-frequency antenna coil that are encapsulated in the horizontal positioned in plate body, and radio-frequency antenna coil coiling is rectangle.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310734261.1A CN103699917B (en) | 2013-12-27 | 2013-12-27 | RFID is without coupling compact shelving |
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| CN201310734261.1A CN103699917B (en) | 2013-12-27 | 2013-12-27 | RFID is without coupling compact shelving |
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| CN103699917A true CN103699917A (en) | 2014-04-02 |
| CN103699917B CN103699917B (en) | 2017-07-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106778418A (en) * | 2016-12-20 | 2017-05-31 | 威海北洋光电信息技术股份公司 | It is a kind of to realize the device and method that label efficiently reads |
| CN108078282A (en) * | 2018-01-22 | 2018-05-29 | 合肥美的智能科技有限公司 | Rack assembly, retail cabinet and the radio frequency antenna apparatus for being sold cabinet |
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| CN1218583A (en) * | 1996-05-13 | 1999-06-02 | 奥根公司 | Flat antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106778418A (en) * | 2016-12-20 | 2017-05-31 | 威海北洋光电信息技术股份公司 | It is a kind of to realize the device and method that label efficiently reads |
| CN106778418B (en) * | 2016-12-20 | 2019-10-25 | 威海北洋光电信息技术股份公司 | A kind of device and method realizing label and efficiently reading |
| CN108078282A (en) * | 2018-01-22 | 2018-05-29 | 合肥美的智能科技有限公司 | Rack assembly, retail cabinet and the radio frequency antenna apparatus for being sold cabinet |
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| Publication number | Publication date |
|---|---|
| CN103699917B (en) | 2017-07-04 |
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