CN208226095U - Intelligent commodity shelf RFID antenna - Google Patents
Intelligent commodity shelf RFID antenna Download PDFInfo
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- CN208226095U CN208226095U CN201721617979.2U CN201721617979U CN208226095U CN 208226095 U CN208226095 U CN 208226095U CN 201721617979 U CN201721617979 U CN 201721617979U CN 208226095 U CN208226095 U CN 208226095U
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- rfid antenna
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Abstract
The utility model discloses a kind of intelligent commodity shelf RFID antenna, the quick and 100% accurate RFID shelf antenna for reading label is provided.Frequency is that the antenna of 13.56MHz RFID is near field antenna, and antenna is embodied with coil form, convenient for being laid with shelf.But there is also label blind area and slow-footed disadvantages of making an inventory.Therefore the utility model by using the mode of partly overlapping of opposite small area same layer antenna evaded large area inner antenna and aerial coil transboundary position electronic tag read blind area, realizing the random putting on article of client can be read by 100%.Solves the problem of co-channel interference that more readers of multi-layered storage rack work at the same time by the small magnetic field shielding for penetrating power and metal and high magnetic permeability film.Switch the antenna of this layer of shelf using more readers between shelf same layer while poll, structure is simple, realizes and quickly makes an inventory, and improves the use feeling of client.
Description
Technical field
The utility model relates to microwave antenna art fields, and in particular, to a kind of intelligent commodity shelf RFID antenna.
Background technique
The Amazon 2016 unmanned shops Amazon Go released, the advanced shopping experience of " taking is to walk, and exempts to be lined up "
It attractes attention once issued by industry, between a period of time, unmanned shop just like has become the new trend of global retail business.
Current unmanned shop is technically broadly divided into three schools, and Amazon Go, naughty coffee and take go can be drawn
For a school, three's is all cutting edge technology hot greatly at present, for example machine vision, deep learning algorithm, sensor melt
Conjunction technology, convolutional neural networks, bio-identification etc., three seem coincidentally that using RFID technique, this, which puts, is not quite worth
Obtain deep thinking.Second school is then primarily referred to as compartmentalized box for holding assorted fruits and candies in riotous profusion, the unmanned shop of 7-11, Luo Sen Japan, and RFID is mainly utilized in this several family
Label technique, for RFID in identification and antitheft upper more advantage to cargo, the program is long-standing, technically also more mature
?.Third school is then the identification to cargo mainly to be completed using two dimensional code, advantage is as convenient bee, the micro- shop small e etc.
It is at low cost, it is closer to traditional retail.
At present, all there are many defects in all unmanned shops, it should say Amazon Go, wash in a pan what coffee was advocated
The shopping experience of " taken and just walked " is only ideal unmanned retail, but a series of reliability of cutting edge technologies used by it and steady
Qualitative to be not possible to guarantee at present, identity validation when big to the identification of dislocation commodity, shop flow of the people as Amazon Go etc. is all
The urgently developing deeply of technology；As the unmanned retail that second and third school is sayed, especially Third Stream, deposited with traditional retail
In more resemblance, but reduce the participation of people, improve efficiency, once sizable application, the benefit created equally can be non-
It is often surprising！
Second school is mainly utilized RFID tag technology, and frequency is to use based on 13.56MHz RFID technique.The frequency
The antenna of rate is near field antenna, and coil form embodies antenna, convenient for being laid with shelf.Shelf can be laminated, convenient for pendulum
Put various article.Especially with the counter of gate inhibition, refrigerator-freezer form, occupied area is small, convenient for being placed in intra-company, cell door
The more public places of populations such as mouth.Once detect purchaser will do shopping cabinet door close, will make an inventory immediately, then and
It settles accounts quickly afterwards, and the shopping category for the people that does shopping and information of withholing is issued into customer mobile phone terminal.General one at present
The number of articles that counter has all reaches hundred magnitude, will not be very little, otherwise needs frequently to replenish, pretty troublesome.It is all primary
Basic both greater than 5 seconds the time required to the poll detection shopping electronic tag of RFID, client needs to wait just after closing door
Cellphone information can be received, so as to detect oneself shopping and information matching degree, prevent system fault.It thus can customer
Experience bad, and other subsequent shoppers are during system makes an inventory article, cannot open shopping cabinet, whose the unknown purchase of anti-locking system
Article has been set, has more caused undesirable shopping experience in this way, while also reducing efficiency.It therefore being capable of quick and 100% standard
True making an inventory is the key technology of self-service cabinet.
What the shelf antenna majority of current 13.56MHz RFID used is come using the form of multiple antennas switching
Realize the reading of larger area and multi-layered storage rack article.Many times businessman defines specific position to different articles, is not
It arbitrarily puts, otherwise in the position at label transboundary reader edge, due to the magnetic direction phase inside and outside reader antenna coil
Instead, it is very faint to will appear the magnetic field sensed for the certain positions of label, is not enough to reach passive label normal work.Article exists at this time
Will be read when making an inventory less than.Fig. 1 is the relative position diagram of one section of reader antenna edge and label antenna.It reads
Device aerial coil 1_1 is the biggish form of relative size, and the aerial coil 1_3 of article tag is relatively small size, it across
On reader antenna coil, less than normal on the inside of reader antenna, outside is bigger than normal.1_2 and 1_4 is reader antenna and label respectively
The feed port of antenna.Assuming that the current direction such as 1_5 in the reader coil at certain moment is read at this time according to the right-hand rule
For the magnetic line of force of device inner antenna along perpendicularly inward 1_7 is faced directly, the magnetic line of force direction on the outside of reader antenna coil is along straight
The vertical outside 1_6 in face.The magnetic line of force in outside is opposite in reader antenna coil.Therefore electronic tag coil 1_3 there is one
The magnetic field strength that a region senses without or very little work normally insufficient for passive chip, there is a horizontal money
The annular region blind area at reader antenna edge.
If client has taken commodity, but does not buy, when putting back to again, it is not placed into the position of requirement, is put
The commodity will be takeed in these label blind zone positions, when system is made an inventory to be taken away by client, and the mistake of client is recorded
Information is bought, unnecessary dispute is caused.Therefore cargo needs any position that can be read on shelf, this is RFID intelligence
It can shelf problem to be solved.
General solution is that the coil antenna area design of 13.56MHz is larger, allow the RFID tag of article all in
The inner antenna of reader, there is no the blind areas inside and outside the reader antenna edge of label antenna transboundary.It is done so that can lead
Cause the inductance value of antenna very big or even reason of parasitic capacitance, cause the self-resonant frequency of antenna lower than working frequency and
It is infeasible.Even if self-resonant frequency is higher than working frequency, impedance matching is also difficult to do, and article is how many and position is different caused
Parasitic capacitance can change, and then impedance matching can be reduced to defective mode from preferable state, lead to the electric current of reader antenna
It reduces.For original Distribution of Magnetic Field with regard to uneven, coil inside is minimum, and the impedance mismatching of antenna will lead to the part among coil antenna
Energy reduces after article tag antenna is taken away, or even cannot work.Therefore, it is however generally that be all the transmitting by increasing reader
Power makes up the above problem.The optimum magnetic field distance that the near field antenna of coil-type can read label is usually coil
Diameter.Big antenna, big transmission power can label read to close on shelf contents, so if using antennae polling
Mode is made an inventory, it is done so that it is long to will result in the time of making an inventory.It is worked at the same time if it is multiple antennas, each reader work exists
The same frequency will cause received interference, lead to article electronic label skip.
Therefore, quick counting obviously can be raised speed, it is therefore desirable to solve mutual between adjacent antenna using more readers
It disturbs.Transmission power is reduced, will cause blind area among large area antenna.Shape that antenna is internally spinned winding can solve in antenna
Between blind zone problem, but blind area band caused by the reverse magnetic field of outside in coil can be led to the problem of.
Utility model content
The purpose of this utility model is to provide a kind of intelligent commodity shelf RFID antennas, to solve in the prior art ask
Topic.
To solve the above-mentioned problems, the technical solution of the utility model is as follows:
The purpose of this utility model is to provide a kind of intelligent commodity shelf RFID antenna, it can provide quickly and 100% is quasi-
Really read the RFID antenna shelf of label, comprising: reader antenna coil, the feed port of reader antenna, article tag day
Line coil, label antenna feed port, across reader coil label read blind area band, folding line coil, metal material,
High magnetic permeability magnetic film, the cover plate of aerial head and set of frequency are in 13.56MHz.
Preferably, the antenna shelf are fixed using reader antenna coiler part overlay structure, allow two close on read
Read device antenna label blind area separate, therefore using switching when, may be implemented antenna A read less than label, can
To be read by the B antenna with overlapping region, to realize the beneficial effect of large area and non-blind area；
Preferably, since the reader antenna A and antenna B that close on are to partly overlap that mutual idol will be generated, that is to say, that read
When device antenna A is read as work antenna, antenna B should not theoretically work, but since it has between antenna A
Coupling just becomes the load of antenna A, and then reduces the performance of antenna A, while also will form new blind area.It therefore can be with
By the position optimization between antenna A and the antenna B of overlapping, so that the coefficient of coup of the two is close to 0, each other not as load；
Preferably, or using antenna change-over switch between impedance matching circuit and antenna, the capacitor of impedance matching is not
The short-circuit reader antenna of meeting, idle reader antenna is in open-circuit condition at this time；Or the impedance matching circuit of antenna is straight
It connects and is connect with antenna, then connecting coaxial cable, the switching switch of cable connection reader, the impedance matching of reader antenna
Shunt capacitance or aerial coil are just opened a way when idle using RF switch, to solve the reader antenna of overlapping
Between mutual even problem.
Preferably, different layers use more reader forms, that is to say, that the poll time for reducing antenna reaches quick disk
The effect of point.More readers work at the same time, and working frequency is identical, necessarily will cause co-channel interference, and the signal of label is caused to connect
Receipts go wrong.If using time-sharing work efficiency will be reduced, therefore other than low-power consumption, every layer of shelf are additionally used
Bottom uses metal material, is high magnetic permeability magnetic film above the metal material, can shield the magnetic field of antenna significantly to facing
The propagation of nearly shelf.
Preferably, the metal material is fixed on every layer of bottom shelf；The high magnetic permeability magnetic film is fixed on metal material
Upper surface；The reader antenna coil is fixed between the high magnetic permeability magnetic film and the cover plate of aerial head；
Preferably, the reader antenna coil fixing structure uses multiple reader days in the antenna shelf of same layer
The structure of line coiler part overlapping is fixed；
Preferably, the feed port of the reader antenna is located at one end of reader antenna coil；
Preferably, the folding line coil is located at reader antenna coil turning
Preferably, hollow cavity is formed between the high magnetic permeability magnetic film and the cover plate of aerial head, is fixed in cavity
There is multiple groups reader antenna coil；
Preferably, the hollow cavity is right prism or cylindrical body；
Preferably, the height of the hollow cavity is 1/8th of the RFID antenna operation wavelength；
Preferably, the hollow cavity is cuboid, and the length and width of bottom surface is respectively the RFID antenna
0.6 to 1.4 times of operation wavelength；
Preferably, the hollow cavity is cylindrical body, and the radius of the bottom surface of the hollow cavity is the radio frequency identification day
0.55 to 1.45 times of line operation wavelength.
The utility model has the beneficial effects that evading by using the mode of partly overlapping of the same layer antenna of opposite small area
The electronic tag of large area inner antenna and aerial coil transboundary position reads blind area, realizes the random putting on article of client all
It can be read and non-blind area by 100%.It is solved by the small magnetic field shielding for penetrating power and metal and high magnetic permeability film
The problem of co-channel interference that more readers of multi-layered storage rack work at the same time.Using more readers between shelf same layer while poll
The antenna for switching this layer of shelf is realized and is quickly made an inventory, and improves the use feeling of client.
Detailed description of the invention
The relative position of Fig. 1-one sections of reader antenna edges and label antenna diagram；
Fig. 2-is across the label blind zone schematic diagram in reader coil；
The adjacent antenna blind area schematic diagram for having overlay region of Fig. 3-；
Fig. 4-folding line near field antenna schematic diagram；
The low antenna circuit figure of Fig. 5-adjacent antenna coefficient of coup；
The antenna circuit figure that Fig. 6-can open a way with switch；
Fig. 7-antenna change-over switch is directly connected to the circuit diagram of antenna；
Fig. 8-single layer bracket sectional view.
Appended drawing reference:
1_1- reader antenna coil；The feed port of 1_2- reader antenna；1_3- article tag aerial coil；1_4-
The feed port of label antenna；Certain moment current direction inside 1_5- reader antenna；The outer inside magnetic of 1_6- reader coil
Line of force direction；The outer inside magnetic line of force direction of 1_7- reader coil；2_1- reads blind area band across the label of reader coil；3_
1- partly overlaps coil a；3_2- partly overlaps coil b；3_3- reads blind area band across the label in 3_2 coil；3_4- across
Blind area band is read in the label of 3_1 coil；The single folding line coil of 4_1-；4_2- overlapping and the coefficient of coup are essentially 0 bending
Line coil antenna a；4_3- overlapping and the coefficient of coup are essentially 0 folding line coil antenna b；4_4- is overlapped and the coefficient of coup is basic
For 0 folding line coil antenna c；4_5- overlapping and the coefficient of coup are essentially 0 folding line coil antenna d；8_1- metal material
Material；8_2- high magnetic permeability magnetic film；The reader antenna coil a that 8_3- intersects；The reader antenna coil b that 8_4- intersects；8_5 is
The cover plate of aerial head；8_6- hollow cavity；3_11- antenna 1；3_22- antenna 2；3_55- antenna 3；3_66- antenna 4；3_
77- antenna 5.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with embodiment and
Technical solution of the present invention is clearly and completely described in attached drawing, it is clear that described embodiment is the one of the utility model
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
Every other embodiment obtained under the premise of creative work is made, the protection scope of the utility model is belonged to.
The technology contents of the utility model are further said below with reference to all attached drawing Fig. 1-Fig. 8 and embodiment
It is bright:
Fig. 3 is the adjacent antenna blind area schematic diagram for having overlay region.The multiple antennas coil of the antenna shelf of same layer uses portion
The form of point overlapping, allows the label blind area 3_3 and 3_4 of two reader antennas closed on point to open, thus using switching when
Wait, may be implemented antenna 3_1 read less than label, can be read by the 3_2 antenna with overlapping region, it is big to realize
Area and non-blind area.3_55 and 3_66 be it is identical as 3_11 and 3_22, but the two in groups and then it is secondary partly overlap, this
When 4 antennas among just will form blind area area, the area is at this time being covered using the 5th antenna 3_77.With this
The form of sample, antenna can continuous area increased, and the antenna that is closed on of blind area is eliminated.
Same layer counter shelf are switched using the antenna of the multiple opposite small areas of the same reader, realize small transmitting function
Under rate, coil inside is also without reading blind area.Can also be using the form of another bending wire antenna, aerial coil is in antenna
Portion's bending uses the form wound in helix case, so that the Distribution of Magnetic Field of antenna is equal without aerial coil more than inner antenna
It is even, and then the transmission power for further decreasing reader can read full article tag.4_2 and 4_3,4_4 and 4_5 are two
Coil transboundary blind area it is interleaved come wiring configuration.It is then overlapped again two-by-two staggeredly, makes up inside and outside coil blind area transboundary, day each other
The area of line can constantly increase.
Since the reader antenna A and antenna B that close on are to partly overlap that mutual idol will be generated, that is to say, that reader antenna
When A is as work antenna, antenna B should not theoretically work, but since it is coupled between antenna A, just at
For the load of antenna A, and then the performance of antenna A is reduced, while also will form new blind area.Therefore can by antenna A and
Position optimization between the antenna B of overlapping, so that the coefficient of coup of the two is close to 0, each other not as load, antenna 3_11 and day
Line 3_22, antenna 3_55 and antenna 3_66, antenna 4_2 and antenna 4_3, antenna 4_4 and antenna 4_5 are exactly such design.This
When Antenna Impedance Matching and connection circuit can be realized according to Fig. 5.
But the coefficient of coup between antenna 3_77 and adjacent antenna is not just 0, can use antenna change-over switch at this time
Between impedance matching circuit and antenna, the capacitor of impedance matching will not short-circuit reader antenna, idle reader at this time
Antenna is in open-circuit condition, such as Fig. 6；Or the impedance matching circuit of antenna is directly connect with antenna, then connecting coaxial cable,
The switching of cable connection reader switchs, and the shunt capacitance or aerial coil of the impedance matching of reader antenna are opened using radio frequency
Pass is just opened a way when idle, to solve the problems, such as mutual even between the reader antenna of overlapping, such as Fig. 7.
Different layers use more reader forms, that is to say, that the poll time for reducing antenna reaches the effect of quick counting
Fruit.More readers work at the same time, and working frequency is identical, necessarily will cause co-channel interference, cause the signal of label to receive and occur
Problem.If will reduce efficiency, therefore other than low-power consumption using time-sharing work, additionally using every layer of bottom shelf makes
While support with metal material 8_1, shielding action is also played；But the antenna of coil-type is arranged above sheet metal,
It will necessarily cause biggish vortex, and then reduce the performance of antenna, therefore be high magnetic permeability magnetic film 8_ on metal material 8_1
2, in hollow cavity 8_6, so that the magnetic line of force of coil 8_3 and 8_4 are walked inside 8_2 substantially, the vortex that metal 8_1 is formed is just
Seldom, damage of the metal to antenna performance is greatly reduced.
Therefore the utility model has evaded large area by using the mode of partly overlapping of the same layer antenna of opposite small area
The electronic tag of inner antenna and aerial coil transboundary position reads blind area, and realizing the random putting on article of client can be by
100% reads and non-blind area.Solves multilayer goods by the small magnetic field shielding for penetrating power and metal and high magnetic permeability film
The problem of co-channel interference that more readers of frame work at the same time.Originally using the poll switching simultaneously of more readers between shelf same layer
The antenna of layer shelf, realizes and quickly makes an inventory, improve the use feeling of client.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (6)
1. a kind of intelligent commodity shelf RFID antenna, which is characterized in that the feed including reader antenna coil, reader antenna
Port, article tag aerial coil, label antenna feed port, across reader coil label read blind area band, bending
Line coil, metal material, high magnetic permeability magnetic film, the cover plate of aerial head and set of frequency are in 13.56MHz；
The metal material is fixed on every layer of bottom shelf；The high magnetic permeability magnetic film is fixed on the upper surface of metal material；Institute
Reader antenna coil is stated to be fixed between the high magnetic permeability magnetic film and the cover plate of aerial head；
The reader antenna coil fixing structure uses multiple reader antenna coiler parts in the antenna shelf of same layer
The structure of overlapping is fixed；
The feed port of the reader antenna is located at one end of reader antenna coil；
The folding line coil is located at reader antenna coil turning.
2. a kind of intelligent commodity shelf RFID antenna according to claim 1, which is characterized in that the high magnetic permeability magnetic film
Hollow cavity is formed between the cover plate of aerial head, and multiple groups reader antenna coil is fixed in cavity.
3. a kind of intelligent commodity shelf RFID antenna according to claim 2, which is characterized in that the hollow cavity is straight
Prism or cylindrical body.
4. a kind of intelligent commodity shelf RFID antenna according to claim 2, which is characterized in that the height of the hollow cavity
Degree is 1/8th of the RFID antenna operation wavelength.
5. a kind of intelligent commodity shelf RFID antenna according to claim 2, which is characterized in that the hollow cavity is length
Cube, the length and width of bottom surface are respectively 0.6 to 1.4 times of the operation wavelength of the RFID antenna.
6. a kind of intelligent commodity shelf RFID antenna according to claim 2, which is characterized in that the hollow cavity is circle
Cylinder, the radius of the bottom surface of the hollow cavity are 0.55 to 1.45 times of the RFID antenna operation wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721617979.2U CN208226095U (en) | 2017-11-28 | 2017-11-28 | Intelligent commodity shelf RFID antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721617979.2U CN208226095U (en) | 2017-11-28 | 2017-11-28 | Intelligent commodity shelf RFID antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208226095U true CN208226095U (en) | 2018-12-11 |
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ID=64532478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721617979.2U Active CN208226095U (en) | 2017-11-28 | 2017-11-28 | Intelligent commodity shelf RFID antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN208226095U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113570766A (en) * | 2021-07-27 | 2021-10-29 | 广州安的电子科技有限公司 | Non-inductive channel intelligent networking identification system |
| CN117077717A (en) * | 2023-08-16 | 2023-11-17 | 广州浩安智能科技有限公司 | RFID antenna positioning and indicating system and method for open shelf |
-
2017
- 2017-11-28 CN CN201721617979.2U patent/CN208226095U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113570766A (en) * | 2021-07-27 | 2021-10-29 | 广州安的电子科技有限公司 | Non-inductive channel intelligent networking identification system |
| CN113570766B (en) * | 2021-07-27 | 2022-04-19 | 广州安的电子科技有限公司 | Non-inductive channel intelligent networking identification system |
| CN117077717A (en) * | 2023-08-16 | 2023-11-17 | 广州浩安智能科技有限公司 | RFID antenna positioning and indicating system and method for open shelf |
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