CN207489060U - A kind of RFID Phase arrays antenna system and refrigerator - Google Patents
A kind of RFID Phase arrays antenna system and refrigerator Download PDFInfo
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- CN207489060U CN207489060U CN201721604024.3U CN201721604024U CN207489060U CN 207489060 U CN207489060 U CN 207489060U CN 201721604024 U CN201721604024 U CN 201721604024U CN 207489060 U CN207489060 U CN 207489060U
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Abstract
The utility model discloses a kind of RFID Phase arrays antenna system and refrigerator, the RFID Phase arrays antenna system includes：RFID reader, multiple RFID label tags and multiple antennas for communicating with RFID label tag；For distributing the power splitter of the output power of each antenna；For changing the phase-shifter of the radiofrequency signal phase of each antenna；For controlling the Phase array controller of power splitter and phase-shifter；The more communications cables；The input terminal of the power splitter connects RFID reader by a communications cable, the input terminal of the output terminal connection phase-shifter of the power splitter, the Phase array controller connects RFID reader, the control terminal of power splitter and the control terminal of phase-shifter by a communications cable respectively, and the output terminal of the phase-shifter connects multiple antennas.The utility model changes the intensity and phase of the radiofrequency signal of each antenna by power splitter and phase-shifter, makes the RFID label tag in the electric field of its radiation superposition formation that can accurately be read.
Description
Technical field
The utility model is related to technical field of RFID, more particularly to a kind of RFID Phase arrays antenna system and cold
Cabinet.
Background technology
Referring to Fig. 1, the direction of an electric field schematic diagram for existing RFID antenna, including RFID reader and single day
Line, the direction of an electric field figure which generates is fixed-direction（The direction of an electric field figure for the antenna being differently directed is different, but is all
It is fixed）, therefore the RFID antenna can identify that the range of electronic tag is also fixed.Although a RFID reader can
To connect more antennas simultaneously, but every antenna is all independent from each other and correlation does not occur with other antennas, so whole
Direction of an electric field figure in a system environments is also fixed, necessarily there is blind spot in system（Blind spot refers to compare in direction of an electric field figure
Weak position）Presence and system to there is identification power inadequate, the problem of discrimination is relatively low, carried in particular for piling
The cabinet environment of metal and liquid material article, original single stand-alone antenna are easy to electromagnetic field occur because environment influences
The problems such as lobe directions offset and gain reduction.The RFID marks on article can not be accurately identified so as to existing RFID antenna
Label so that the restricted application of the system.
Thus the prior art could be improved and improve.
Utility model content
Part in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of RFID Phase arrays days
Linear system is united and refrigerator, can be realized by the antenna that is distributed in refrigerator cabinet in cabinet Commercial goods labels accurately identify and position
Judge.
In order to achieve the above object, the utility model takes following technical scheme：
A kind of RFID Phase arrays antenna system, including：It RFID reader, multiple RFID label tags and multiple is used for and RFID
The antenna of label communication；
For distributing the power splitter of the output power of each antenna；
For changing the phase-shifter of the radiofrequency signal phase of each antenna；
For controlling the Phase array controller of power splitter and phase-shifter；
The more communications cables；
The input terminal of the power splitter by a communications cable connect RFID reader, the power splitter it is defeated
Outlet connects the input terminal of phase-shifter, and the Phase array controller connects RFID reader, work(by a communications cable respectively
The control terminal of rate splitter and the control terminal of phase-shifter, the output terminal of the phase-shifter connect multiple antennas.
In the RFID Phase array antenna systems, the output terminal of the power splitter is included with mutiple antennas one by one
Corresponding multiple interfaces, multiple interfaces connect corresponding antenna by phase-shifter respectively.
In the RFID Phase array antenna systems, the quantity of the interface is 4-16.
In the RFID Phase array antenna systems, the communications cable is radio frequency feed line.
In the RFID Phase array antenna systems, the RFID Phase arrays antenna system uses superfrequency radio
Wave frequency section.
A kind of refrigerator including cabinet, is provided with multiple goods for sale and as described in any of the above one in the cabinet
RFID Phase array antenna systems, multiple goods for sale are bonded with multiple RFID label tags one-to-one correspondence.
In the refrigerator, the refrigerator is intelligence retail refrigerator.
Compared to the prior art, a kind of RFID Phase arrays antenna system provided by the utility model and refrigerator, it is described
RFID Phase array antenna systems include：RFID reader, multiple RFID label tags and multiple for communicating with RFID label tag
Antenna；For distributing the power splitter of the output power of each antenna；For changing the phase shift of the radiofrequency signal phase of each antenna
Device；For controlling the Phase array controller of power splitter and phase-shifter；The more communications cables；The power splitter it is defeated
Enter end and RFID reader, the input terminal of the output terminal connection phase-shifter of the power splitter, institute are connected by a communications cable
It states Phase array controller and RFID reader, the control terminal of power splitter and phase-shifter is connected by a communications cable respectively
Control terminal, the output terminal of the phase-shifter connect multiple antennas.The utility model controls work(by Phase array controller
Rate splitter and phase-shifter change the RF signal strength and signal phase entered in each antenna, make what these antenna gave off
Electric field is mutually superimposed, ultimately forms the direction of an electric field radiation diagram of the assigned direction of the high-gain of a meet demand, so as to right
Answering the RFID label tag of on-site will accurately be read, and avoid causes discrimination to be deteriorated because system leads to the problem of blind area, and
It can also obtain the specific location of RFID label tag.
Description of the drawings
Fig. 1 is the direction of an electric field schematic diagram of existing RFID antenna.
Fig. 2 is the structure diagram of RFID Phase arrays antenna system provided by the utility model.
Fig. 3 is the direction of an electric field signal of the RFID Phase array antenna systems of preferred embodiment provided by the utility model
Figure.
Fig. 4 is the structure of the refrigerator using RFID Phase array antenna systems of preferred embodiment provided by the utility model
Schematic diagram.
In figure, 10, RFID reader；20th, RFID label tag；30th, antenna；40th, power splitter；41st, interface；50th, phase shift
Device；60th, Phase array controller；70th, the communications cable；80th, cabinet；81st, goods for sale；90th, direction of an electric field figure.
Specific embodiment
Part in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of RFID Phase arrays days
Linear system is united and refrigerator, can be realized by the antenna that is distributed in refrigerator cabinet in cabinet Commercial goods labels accurately identify and position
Judge.
To make the purpose of this utility model, technical solution and effect clearer, clear and definite, develop simultaneously implementation referring to the drawings
The utility model is further described in example.It should be appreciated that specific embodiment described herein is only explaining this practicality
It is novel, it is not used to limit the utility model.
Referring to Fig. 2, the structure diagram for RFID Phase arrays antenna system provided by the utility model, the RFID phases
Array antenna system is ranked to include：RFID reader 10, multiple RFID label tags 20 and multiple days for communicating with RFID label tag 20
Line 30；
For distributing the power splitter 40 of the output power of each antenna 30；
For changing the phase-shifter 50 of the radiofrequency signal phase of each antenna 30；
For controlling the Phase array controller 60 of power splitter 40 and phase-shifter 50；
The more communications cables 70；
The input terminal of the power splitter 40 connects RFID reader 10, the power branch by a communications cable 70
The input terminal of the output terminal connection phase-shifter 50 of device 40, the Phase array controller 60 are connected respectively by a communications cable 70
The control terminal of RFID reader 10, the control terminal of power splitter 40 and phase-shifter 50, the output terminal connection of the phase-shifter 50
Multiple antennas 30.
Wherein, when the radiofrequency signal that RFID reader 10 emits reaches antenna 30 by power splitter 40 and phase-shifter 50
When, antenna 30 is radiated electric signal in air, and RFID label tag 20 starts work, and to RFID reader after obtaining energy at this time
10 order carries out response, and the signal of response is converted to electric signal by antenna 30 and enters RFID reader 10, RFID reader
10 are obtained with the electronic code of the RFID label tag 20, and the signal strength of RFID label tag 20 back to RFID reader 10 is known as
RSSI（Received signal strength）.
In the present embodiment, the RFID reader 10 is by controlling the I/O mouths of Phase array controller 60 so that phase
The control power splitter 40 of array controller 60 and phase-shifter 50 can be adjusted into the RF signal strength in each antenna 30
And signal phase, and the direction run is the adjustment of three dimensions omnidirectional, is also far longer than original in the maximum gain of its traffic direction
Some fixation individual antennas 30.Make the electric field that these antenna 30 gives off mutually superimposed, ultimately form meet demand
The direction of an electric field radiation diagram of the assigned direction of high-gain so as to which the RFID label tag 20 of corresponding on-site will be accurately read, avoids
Discrimination is caused to be deteriorated because system leads to the problem of blind area.
In a further embodiment, the output terminal of the power splitter 40 includes one-to-one with more antennas 30
Multiple interfaces 41, multiple interfaces 41 connect corresponding antenna 30 by phase-shifter 50 respectively, and power splitter 40 is by power
It is assigned to corresponding interface 41 as desired so that antenna 30 sends out the radiofrequency signal of varying strength.The quantity of the interface 41
For two or more than two, it is preferred that the quantity of the interface 41 is 4-16, certainly also can be according to actual needs using more
Interface 41.Specific power distribution is that array direction of an electric field figure as required calculates what is determined.Power splitter 40 exports
Power can be that each interface 41 have power distribution, also can only select certain interfaces 41 has power output and remaining interface 41 does not have
There is a power output, array direction of an electric field figure during practical application simultaneously as required, which calculates, to be determined.
There is computing unit inside Phase array controller 60, control power divider and phase after the calculating of scheduled algorithm
Move device 50.RFID reader 10 is also required to communicate with Phase array controller 60, and each RFID reader 10 is completed to a section
After all electronic tags in domain are made an inventory, it will say the word and inform Phase array controller 60,60 meeting of Phase array controller
Power divider and phase-shifter 50 are adjusted, forms new array direction of an electric field figure, RFID reader 10 is opened power and carried out at this time
It makes an inventory in next region.
Referring to Fig. 3, the electric field side of the RFID Phase array antenna systems for preferred embodiment provided by the utility model
To schematic diagram.Pass through the adjustment of Phase array controller 60 in the figure, antenna 30 can be caused to export different direction of an electric field figures
90.Present three groups of direction of an electric field Figure 90 in the present embodiment, the axis of respectively direction of an electric field and antenna is at 45 °, 0 °, -45 °
Situation, the precision of the angle and direction of the radiation of the electric field of formation are related to 30 quantity of array antenna and 50 precision of phase-shifter.
According to the actual needs of RFID reader 10, after the adjustment by Phase array controller 60, the electric field of the formation of antenna 30 can be made
Direction meets the needs of RFID reader 10.
Preferably, the communications cable 70 is radio frequency feed line, can with minimal losses, do not pick up clutter interference and expeditiously
Signal is conveyed, and its signal conveyed is made not play the radiation energy of antenna 30 or be made by external electric field inductive pick-up energy
With.30 system of RFID Phase arrays antenna uses UHF radio waves frequency range (Ultra High Frequency),
The band limits used is 400MHz ~ 1GHz, and common main specifications has 433MHz, 868 ~ 950MHz.This frequency range passes through
Means of electromagnetic waves carries out the transmission of energy and information, makes the advantage of lower cost of RFID label tag 20, reads distant, letter
It is very fast to cease transmission rate, and the reading and identification of big amount tag can be carried out at the same time, is therefore particularly suitable for logistics and confession
Answer the fields such as chain management.
As shown in figure 4, present invention also provides a kind of refrigerator, including cabinet 80, multiple treat is provided in the cabinet 80
Sell commodity 81 and 30 system of RFID Phase arrays antenna as described in any of the above one, multiple goods for sale 81 with it is multiple
RFID label tag 20 corresponds fitting.Since the direction of an electric field figure of 30 system of RFID Phase arrays antenna can pass through Phase array
Controller 60 adjusts, so in the particular embodiment, can realize as different direction of an electric field Figure 90 such as 4 kinds in Fig. 4, angle
Degree is respectively N °, M °, K ° and T °, and the RFID label tag 20 that these direction of an electric field figures are directed toward be provided in respectively it is different for sale
RFID label tag A, RFID label tag B, RFID label tag C and RFID label tag D on commodity 81.So in corresponding direction of an electric field figure, it is special
The energy intensity RSSI for determining the return of RFID label tag 20 is the largest, and being calculated by the cooperation of RFID reader 10 can realize with being somebody's turn to do
20 corresponding goods for sale 81 of RFID label tag（The information of goods for sale 81 is related to the number of corresponding RFID label tag 20）It places
The calculating of position.
In traditional RFID reader antenna system, the location information of None- identified label object can only be realized
Whether this label is recognized.After the Phase array antenna technology of this patent has been used, it can be obtained not by adjusting phase
Different energy intensities is returned to, and read by different direction of an electric field figures and the RFID of RFID label tag response at this time with situation subscript label
Backward energy intensity RSSI when writing device may determine that the location information for posting the article of electronic tag.
In a still further embodiment, the refrigerator is intelligence retail refrigerator.At present, the application of RFID technique is a variety of more
Sample not only also plays vital technology using extensively in logistics and storage field in new retail and unmanned be sold
Academic title.In continuous carry out, present RFID electronic label quantity increases every year for the technology upgrading of the bar code of RFID label tag replacement simultaneously
Long rate is 40%, has been more than 300% in the speedup of unmanned retail domain.However be directed to unmanned retail domain RFID reader and
Before antenna technology stops not always, the development of industry is limited.Therefore, the utility model is applied to intelligent retail domain, it can
To further speed up the development of intelligent retail trade, facility is provided to more people.
In conclusion a kind of RFID Phase arrays antenna system provided by the utility model and refrigerator, the RFID phases
Array antenna system is ranked to include：RFID reader, multiple RFID label tags and multiple antennas for communicating with RFID label tag；For
Distribute the power splitter of the output power of each antenna；For changing the phase-shifter of the radiofrequency signal phase of each antenna；For controlling
The Phase array controller of power splitter and phase-shifter processed；The more communications cables；The input terminal of the power splitter passes through
One communications cable connects RFID reader, the input terminal of the output terminal connection phase-shifter of the power splitter, and the phase is ranked
Battle array controller connects RFID reader, the control terminal of power splitter and the control terminal of phase-shifter by a communications cable respectively,
The output terminal of the phase-shifter connects multiple antennas.The utility model controls power splitter by Phase array controller
Change the RF signal strength and signal phase entered in each antenna with phase-shifter, make the electric field that these antenna gives off mutual
Superposition ultimately forms the direction of an electric field radiation diagram of the assigned direction of the high-gain of a meet demand, so as to corresponding on-site
RFID label tag will accurately be read, avoid causes discrimination to be deteriorated because system leads to the problem of blind area, and can also obtain
To the specific location of RFID label tag.
It is understood that for those of ordinary skills, can with technical solution according to the present utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (7)
1. a kind of RFID Phase arrays antenna system, including RFID reader, multiple RFID label tags and multiple it is used for and RFID is marked
Sign the antenna of communication, which is characterized in that further include：
For distributing the power splitter of the output power of each antenna；
For changing the phase-shifter of the radiofrequency signal phase of each antenna；
For controlling the Phase array controller of power splitter and phase-shifter；
The more communications cables；
The input terminal of the power splitter connects RFID reader, the output terminal of the power splitter by a communications cable
The input terminal of phase-shifter is connected, the Phase array controller connects RFID reader, power point by a communications cable respectively
The control terminal of road device and the control terminal of phase-shifter, the output terminal of the phase-shifter connect multiple antennas.
2. RFID Phase arrays antenna system according to claim 1, which is characterized in that the output of the power splitter
End is including multiple interfaces, multiple interfaces connect corresponding antenna by phase-shifter respectively correspondingly with more antennas.
3. RFID Phase arrays antenna system according to claim 2, which is characterized in that the quantity of the interface is 4-16
It is a.
4. RFID Phase arrays antenna system according to claim 1, which is characterized in that the communications cable is radio-frequency feed
Line.
5. RFID Phase arrays antenna system according to claim 1, which is characterized in that the RFID Phase arrays antenna
System uses UHF radio waves frequency range.
6. a kind of refrigerator for applying the RFID Phase array antenna systems as described in any one in claim 1-5, feature
It is, including cabinet, multiple goods for sale, multiple goods for sale and multiple RFID label tags is provided in the cabinet
Correspond fitting.
7. refrigerator according to claim 6, which is characterized in that the refrigerator is intelligence retail refrigerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721604024.3U CN207489060U (en) | 2017-11-27 | 2017-11-27 | A kind of RFID Phase arrays antenna system and refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721604024.3U CN207489060U (en) | 2017-11-27 | 2017-11-27 | A kind of RFID Phase arrays antenna system and refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207489060U true CN207489060U (en) | 2018-06-12 |
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ID=62472692
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721604024.3U Active CN207489060U (en) | 2017-11-27 | 2017-11-27 | A kind of RFID Phase arrays antenna system and refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207489060U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109816065A (en) * | 2019-01-22 | 2019-05-28 | 云圣物联(深圳)有限公司 | A kind of bin article checking method for eliminating RFID intelligent cabinet electromagnetic shielding measure |
| WO2021097835A1 (en) * | 2019-11-22 | 2021-05-27 | 连云港伍江数码科技有限公司 | Storage device and freezer |
-
2017
- 2017-11-27 CN CN201721604024.3U patent/CN207489060U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109816065A (en) * | 2019-01-22 | 2019-05-28 | 云圣物联(深圳)有限公司 | A kind of bin article checking method for eliminating RFID intelligent cabinet electromagnetic shielding measure |
| WO2021097835A1 (en) * | 2019-11-22 | 2021-05-27 | 连云港伍江数码科技有限公司 | Storage device and freezer |
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