CN111814507A - Device and method for enhancing read-write capability of RFID group tag - Google Patents
Device and method for enhancing read-write capability of RFID group tag Download PDFInfo
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- CN111814507A CN111814507A CN202010716369.8A CN202010716369A CN111814507A CN 111814507 A CN111814507 A CN 111814507A CN 202010716369 A CN202010716369 A CN 202010716369A CN 111814507 A CN111814507 A CN 111814507A
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- 239000011229 interlayer Substances 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
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- 239000002184 metal Substances 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 8
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- 206010063385 Intellectualisation Diseases 0.000 description 1
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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
- G06K7/10158—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 methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
- G06K7/10178—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 methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field
Abstract
The invention provides a device for enhancing the read-write capability of RFID group labels, which comprises: two parallel conductive plates; a reading and writing space for reading and writing the label is formed between the two conductive plates, a reader-writer antenna is arranged in the reading and writing space, and the vertical distance between the reader-writer antenna and the conductive plates and the vertical distance between the two conductive plates are integral multiples of the working wavelength of the reader-writer antenna. The invention also provides a method for enhancing the read-write capability of the RFID group tag, wherein two conductive plates are arranged in parallel, the conductor plates are basically and vertically irradiated by the working wave of the reader-writer antenna to approximately form total reflection, so that the reflected wave and the incident wave are positively superposed to achieve the enhancement effect, and after multiple reflections and superposition, the electromagnetic power density of the working wave between the conductive plates reaches a larger value. The device and the method are simple, but can realize the quick reading and writing of the batch dense labels close to each other, thereby greatly improving the reading and writing efficiency.
Description
Technical Field
The invention belongs to the technical field of radio frequency identification, and particularly relates to a device and a method for enhancing the read-write capability of RFID group tags.
Background
In recent years, with the development of very large scale integrated circuit technology, the cost of the RFID identification system equipment is greatly reduced, and the RFID identification technology gradually becomes practical and is widely applied in various fields. The RFID technology is applied to article management, convenience and intellectualization are realized, and the convenience is mainly embodied in information reading of bundled articles. The term "bundled articles" means that more articles are bundled together, and the number of articles is larger, and the articles are denser. When large articles are bundled, due to the fact that the sizes of the articles are large, the sizes of the tag antennas are relatively large, and the intervals are large, so that tag reading is easy to achieve, and the mode is the mode in which the RFID technology is applied most.
However, the RFID technology faces more technical bottlenecks in the application of bundling small articles. First, small items have small tag antenna sizes due to their small size, and small items are bundled together, which also makes reading difficult due to the fact that RFID tags embedded in the items are also bundled together. In addition, the performance of the RFID tag is greatly reduced due to the fact that the small articles are mostly made of dielectric loss materials, and the difficulty of reading the full tag is further enhanced. In the prior art, the bundled articles have to be disassembled and read one by one, which wastes time and labor, and thus the application of the RFID technology loses convenience. Research and solution to batch reading have been an important research project for RFID application technology, and although many methods and devices are disclosed, the methods and devices still far fall short of the practical application requirements, and the devices have complex structures and low efficiency, which is still the current main phenomenon.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides an apparatus and method for enhancing the read-write capability of RFID group tags.
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The invention adopts the following technical scheme:
in some optional embodiments, there is provided an apparatus for enhancing read-write capability of RFID group tags, comprising: two parallel conductive plates; a read-write space for reading and writing the label is formed between the two conductive plates, a reader-writer antenna is arranged in the read-write space, and the vertical distance between the reader-writer antenna and the conductive plates and the vertical distance between the two conductive plates are integral multiples of the working wavelength of the reader-writer antenna.
In some optional embodiments, the reader antenna is a directional microstrip antenna, and an aperture of the reader antenna is smaller than 0.25 times of an operating wavelength of the reader antenna.
In some optional embodiments, a vertical distance between a position for placing a tag in the read/write space and the conductive plate is greater than 0.16 times an operating wavelength of the reader/writer antenna.
In some optional embodiments, the apparatus for enhancing read-write capability of an RFID group tag further includes: a box body; the box wall of the box body is the conductive plate or the conductive plate is arranged on the inner surface of the box wall of the box body; a nonmetal inner container is arranged in the box body, an interlayer is arranged between the nonmetal inner container and the conductive plate, and the reader-writer antenna is located in the interlayer.
In some optional embodiments, the box body is provided with an opening, and the opening is provided with a shielding curtain.
In some optional embodiments, the nonmetal inner container is detachably connected with the box body, the front end of the nonmetal inner container is clamped with the opening, and the rear end of the nonmetal inner container is clamped with the rear side wall of the box body.
In some optional embodiments, the conductive plates in the box are arranged up and down and/or left and right, and the reader-writer antennas on the different conductive plates arranged oppositely are arranged in a cross manner.
In some optional embodiments, a reader is arranged in the box body, the reader is connected with the reader antenna, and an interface for connecting a reader power supply and communication equipment is arranged on the side wall of the box body.
In some optional embodiments, the present invention further provides a method for enhancing read-write capability of an RFID group tag, including the following steps:
arranging two parallel conductive plates to form a read-write space for reading and writing a label between the two conductive plates;
the reader-writer antenna positioned in the reading-writing space emits working waves vertical to the conductive plates and reflects forward superposition for multiple times between the two conductive plates to enhance the power density between the two conductive plates, so that a label placed in the reading-writing space is read and written;
and the vertical distance between the reader-writer antenna and the conductive plates and the vertical distance between the two conductive plates are integral multiples of the working wavelength of the reader-writer antenna.
The invention has the following beneficial effects: the two current-conducting plates are arranged in parallel, the conductor plates are basically vertically irradiated by the working wave of the reader-writer antenna to approximately form total reflection, and meanwhile, the vertical distance between the reader-writer antenna and the current-conducting plates and the vertical distance between the two current-conducting plates are integral multiples of the working wavelength of the reader-writer antenna, so that the forward superposition of the reflected wave and the incident wave can achieve the enhanced effect, and the electromagnetic power density of the working wave between the current-conducting plates can reach a larger value after multiple reflections and superposition. For the read-write tag, the required excitation power is constant under certain conditions, while the electromagnetic field in the space where the tag is located is increased by several times or even tens of times, and the tag is easier to read and write due to the increased excitation power in the device. The device and the method are simple, but can realize the quick reading and writing of the batch dense labels close to each other, thereby greatly improving the reading and writing efficiency.
Drawings
FIG. 1 is a simplified schematic diagram of an apparatus for enhancing the read/write capability of RFID group tags according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a reader/writer antenna according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an apparatus according to another embodiment of the present invention;
FIG. 4 is a schematic structural view of a case and a stand according to another embodiment of the present invention;
fig. 5 is a perspective view showing an internal structure of a cabinet according to another embodiment of the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others.
As shown in fig. 1 and 2, in some illustrative embodiments, there is provided an apparatus for enhancing read-write capability of RFID group tags, comprising: the two conductive plates 10 are arranged in parallel, a reading and writing space 50 for reading and writing the label is formed between the two conductive plates 10, and when the bundled articles need to be read, the articles with the labels 30 are sent into the reading and writing space. The reader antenna 20 is provided in the reading/writing space 50, and the direction of the operating wave of the reader antenna 20 is perpendicular to the conductive plate 10. The vertical distance between the reader/writer antenna 20 and the conductive plate 10 and the vertical distance between the two conductive plates 10 are each an integral multiple of the operating wavelength of the reader/writer antenna 20.
When the vertical distance between the two conductive plates 10 is a single wavelength distance of the operating wavelength of the reader/writer antenna 20, the reader/writer antenna 20 needs to be disposed on the surface of the conductive plate 10, so that the vertical distance between the reader/writer antenna 20 and the conductive plate on the opposite side is just the operating wavelength of the reader/writer antenna 20. Of course, when the vertical distance between the two conductive plates 10 is greater than one time, such as two times or three times, the reader antenna 20 may be disposed on the surface of the conductive plate 10 or at a position having a certain distance from the conductive plate 10, but it is necessary to ensure that the vertical distance between the reader antenna 20 and the conductive plate 10 is also an integral multiple of the operating wavelength of the reader antenna 20.
Because the performance of the RFID tag is sharply reduced due to the small or close spacing between the tag and the RFID tag when the number of the RFID tag is dense, the required excitation power is often increased by several times, and it is difficult to read and write under normal conditions and environments, but the device in this embodiment arranges two conductive plates 10 in parallel, the radiation wave through the reader antenna 20 approximately perpendicularly irradiates the metal conductive plate to approximately form total reflection, and at the same time, the distance between the two conductive plates 10 and the perpendicular distance between the reader antenna 20 and the conductive plates 10 are limited to be integral multiples of the operating wavelength of the reader antenna 20, the operating wave is reflected by the two conductive plates 10, the reflected wave and the incident wave are forward-superposed, and then reflected twice, and the secondary reflected wave forms third reflection and superposition through the other conductive plate 10, so after multiple reflection and superposition, the electromagnetic power density of the operating wave between the conductive plates 10 reaches a large value. For the tag 30 to be read or written, the required excitation power is constant under certain conditions, while the electromagnetic field in the space where the tag is located is increased by several times or even tens of times, and the tag 30 is easy to read or write because the excitation power received by the tag 30 is increased in such a device. The device in the embodiment realizes the multiple increase of the electromagnetic wave radiation power density, and solves the technical bottleneck in the RFID application.
Due to the inherent characteristics of electromagnetic waves, the electromagnetic waves may not be completely perpendicular to the conductive plates 10, and the distance between two conductive plates 10 may not be completely equal to an integral multiple of the wavelength, so that the working wave angle with a certain range of declination also belongs to the perpendicular range of the present embodiment, and the distance between two conductive plates 10 approximately equal to the integral multiple of the wavelength is also the protection range of the present embodiment.
In addition, in an embodiment, the reader/writer antenna 20 is a directional microstrip antenna, and the antenna aperture of the reader/writer antenna is smaller than 0.25 times of the working wavelength of the reader/writer antenna, so that the upper limit of the aperture of the reader/writer antenna 20 is limited, and the purpose is to solve the problem that the influence of the reader/writer antenna 20 during secondary reflection reduces the secondary reflection degree, that is, the even number reflection energy is as large as possible, so that the near-field radiation area is basically overlapped with the near-field sensing area, and the defect that the field intensity distribution range of the near-field radiation area is. Preferably, the aperture of the antenna is 0.1-0.2 times of the wavelength of the working wave. In addition, the reader antenna 20 may be an ultra-high frequency antenna.
The vertical distance between the position for placing the tag in the read/write space 50 and the conductive plate 10 is greater than 0.16 times of the operating wavelength of the reader/writer antenna, that is, the vertical distance between the read/write tag 30 and the reader/writer antenna 20 on the conductive plate 10 is greater than 0.16 times of the operating wavelength, that is, the read/write tag 30 is placed between the parallel conductive plates 10, and the vertical distance between the reader/writer antenna 20 is greater than 0.16 times of the wavelength of the operating wave, and the distance between the read/write tag antenna 20 and each conductive plate 10 is also greater than 0.16 times of the wavelength of the operating wave.
In order to secure a distance between the tag 30 to be read or written and the conductive plate 10, the tag 30 to be read or written is disposed on a support 31, the support 31 includes a pillar 32 and a placement surface 33, the placement surface 33 is lower than the pillar 32, and the pillar 32 has a height greater than 0.16 times the wavelength of the operating wave. At this time, the placing surface 33 refers to the above-mentioned position for placing the label.
Preferably, in order to further expand the read/write range, for example, when the vertical distance between two conductive plates 10 is a single wavelength distance of the operating wavelength of the reader/writer antenna 20, a plurality of reader/writer antennas 20 are disposed on the inner surface of the conductive plate 10, the reader/writer antennas 20 located on different conductive plates 10 are arranged in a staggered manner, and the number of the reader/writer antennas 20 depends on the size of the conductive plate 10, and can be set and adjusted according to the actual application situation.
For the above embodiment, for example, the distance between the two conductive plates 10 in this embodiment is just 1 wavelength of 920MHz, that is, about 33cm, only one conductive plate 10 is provided with the reader/writer antenna 20, the reader/writer antenna 20 is a microstrip antenna, the microstrip antenna is attached to the conductive plate 10, and the radiation patch of the microstrip antenna is also parallel to the conductive plate 10. The read-write tag 30 is placed between the parallel conductive plates 10, and the distance from each plate of the conductive plates 10 is greater than 0.16 times the wavelength, in this embodiment, the distance from the read-write tag 30 to the parallel conductive plates 10 is greater than 5cm in terms of 920MHz wavelength.
The reader antenna 20 of this embodiment is connected to a signal generator of 920-:
the field strength of the present embodiment is increased by more than 10dB compared to that in the open condition, and the difference in field strength is small, as analyzed by the test results. The read-write label 30 is placed in the device for reading and writing, because the read-write field intensity is increased by more than 10dB and the field intensity difference is small, the label is easy to read and write, and the successful and rapid reading and writing of the batch dense labels close to each other are realized.
In another embodiment, as shown in fig. 3 to 5, in order to shield interference and prevent dissipation of the operating wave radiation, the apparatus further comprises: the box 40, the wall of box 40 is the conducting plate 10 or the inner surface of the wall of the box is provided with the conducting plate 10.
A non-metal inner container 41 is arranged in the case 40, an interlayer 45 is arranged between the non-metal inner container 41 and the conductive plate 10, and the reader antenna 20 is located in the interlayer 45.
Preferably, the conductive plates 10 in the case 40 are disposed vertically and/or horizontally, and the reader/writer antennas 20 on the different conductive plates 10 disposed opposite to each other are disposed in a cross shape.
The box 40 in this embodiment can be made of metal, the conductive plate 10 can be an upper side wall, a lower side wall, a left side wall and a right side wall, the front side wall is provided with an opening, so the front side wall and the rear side wall are not provided with the reader-writer antenna 20, but the nonmetal inner container 41, the upper side wall, the lower side wall, the left side wall, the right side wall and the rear side wall form an interlayer 45, the reader-writer antenna 20 is arranged on the upper side wall, the lower side wall, the left side wall and the right side wall in the interlayer 45, the distance between the upper side wall and the lower side wall is matched with the wavelength of the ultrahigh frequency working wave, when the reader-writer antenna 20 works, the working wave is reflected and superposed by the conductive plates 10 on the upper side and the lower side in the closed metal box 40, the power density in the metal cavity is greatly increased, and the stability of; or, the box 40 is made of non-metal material, the conductive plates 10 are fixed on the upper side wall, the lower side wall, the left side wall and the right side wall of the box 40, and the distance between the conductive plates 10 on the opposite surfaces is matched with the wavelength of the ultrahigh frequency working wave.
In addition, the non-metal inner container 41 is made of non-metal materials, plays a role of bearing the checked commodities and has no influence on the penetration of the working waves.
Meanwhile, the reader-writer antenna 20 is a small-caliber ultrahigh-frequency antenna, the antenna gain is 2-3 dB, the size of the small-caliber ultrahigh-frequency antenna is 0.1-0.2 times of the wavelength of the ultrahigh-frequency working frequency band, the interference of reflected electromagnetic waves on the ultrahigh-frequency antenna is effectively avoided due to the small size, the ultrahigh-frequency antenna is fixed in the interlayer 45, preferably, as shown in fig. 5, two reader-writer antennas 20 are respectively arranged on each interlayer 45, the upper reader-writer antenna 20 and the lower reader-writer antenna 20 are arranged in a cross mode, and each reader-writer antenna 20 is symmetrical about the center of the cavity of the nonmetal inner container 41.
More specifically, in order to facilitate the insertion of the read/write tag 30, the box 40 is provided with an opening, and a shielding curtain 42 is provided at the opening to perform a shielding function. Preferably, the shielding curtain 42 in this embodiment can be woven by metal fibers, and is made of a soft material, and can be quickly lifted and lowered, and a square magnet piece is formed along the edge of the shielding curtain 42, so that the shielding curtain 42 is automatically attached to the wall of the box 40 when being lowered. Metal fiber possesses fine electric conductivity, free electron in the metal fiber, under the effect of electromagnetic wave electric field, form the conduction current, the joule heat that the conduction current produced makes the continuous loss of electromagnetic wave energy, thereby reach shielding effect, adopt the shielding curtain 42 that metal fiber woven, network structure has, the surface is coarse, the specular reflection of electromagnetic wave on shielding curtain 42 surface has been reduced, the diffuse reflection has been increased, thereby the formation in radiation blind zone has been reduced, data acquisition's stability has been improved, can also effectively shield the RFID label outside the metal can, prevent misreading, the stability of system acquisition data has been improved. The shielding curtain 42 is connected to the cabinet 40 by a metal fastener.
Nonmetal inner bag 41 can be dismantled with box 40 and be connected, and nonmetal inner bag 41 front end and opening part looks joint, the rear end is mutually in the joint with the rear side wall of box 40. Preferably, the front end of the non-metal inner container 41 is embedded into the opening of the box 40, and the rear end is fixed to the rear side wall of the box 40 by a metal fastener, so that the reader-writer antenna 20 is convenient to install and replace.
More specifically, a reader-writer 43 is disposed in the box 40, the reader-writer 43 is connected to the reader-writer antenna 20, and an interface 44 for connecting a power supply of the reader-writer and a communication device is disposed on a side wall of the box 40.
In addition, the invention also provides a method for enhancing the read-write capability of the RFID group label, which comprises the following steps:
firstly, two parallel conductive plates 10 are arranged, so that a read-write space for reading and writing a label is formed between the two conductive plates 10;
placing a plurality of read-write tags 30 in the read-write space and keeping a certain distance from the conductive plate 10;
then, the reader-writer antenna 20 in the reading-writing space emits working waves perpendicular to the conductive plates 10 and reflects forward superposition for multiple times between the two conductive plates 10 to enhance the power density between the two conductive plates, so that the tag 30 placed in the reading space is read and written, the reading-writing field intensity is greatly increased, small field intensity difference at each position is ensured, the tag is easy to be applied to shoes, and successful and rapid reading and writing are also realized by batch dense tags which are close to each other;
the vertical distance between the reader/writer antenna 20 and the conductive plates 10 and the vertical distance between the two conductive plates 10 are both integer multiples of the operating wavelength of the reader/writer antenna 20.
Preferably, the above operations are also performed in a closed space, such as a box 40, to further maintain the stability of field strength and the accuracy of data acquisition, as shown in the apparatus of the present method.
When reading and writing, the tag 30 to be read and written is set on the placing surface 33 of the support 31, then the tag is sent into the opening, the shielding curtain 42 is closed, reading and writing are started, and after the reading and writing are finished, the shielding curtain 42 is opened, and the support 31 and the tag 30 to be read and written are taken out.
At present, in the jewelry industry, the traditional warehousing and warehousing technical means is relatively backward, most jewelry merchants still adopt a manual counting mode, count the products classified according to a counting table one by one, and check product codes, product names, stone weights, certificate numbers and prices; the jewelry enterprises with better informatization degree carry out warehouse-in and warehouse-out by adopting the mode of scanning bar codes, but the existing working mode still can not be judged by people, the people check that the dependence on skilled workers is higher, one skilled worker can only scan one or two pieces of jewelry per second, and the requirement of timely warehouse-in and warehouse-out of large batches of jewelry at some important selling time nodes is far away satisfied.
Therefore, many enterprises try to use the RFID batch reading technology to realize quick and accurate warehousing and warehousing, and some jewellers adopt reading devices of RFID tags, but the existing devices have unstable performance of batch reading of the RFID tags, and due to the metal characteristics of jewelers, the performance of the RFID tags is affected, and the problem of missed reading is easily caused, so that the reading effect of the RFID tags is affected. The device and the method are applied to the field of jewelry sales, so that the read-write efficiency and the read-write precision can be greatly improved, the batch stable reading of the RFID tags is realized, the shielding effect is good, the misreading is prevented, and the stability of the data acquired by the system is improved.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
Claims (9)
1. An apparatus for enhancing read-write capability of RFID group tags, comprising: two parallel conductive plates; a read-write space for reading and writing the label is formed between the two conductive plates, a reader-writer antenna is arranged in the read-write space, and the vertical distance between the reader-writer antenna and the conductive plates and the vertical distance between the two conductive plates are integral multiples of the working wavelength of the reader-writer antenna.
2. The device of claim 1, wherein the reader antenna is a directional microstrip antenna, and the aperture of the reader antenna is smaller than 0.25 times the operating wavelength of the reader antenna.
3. The device of claim 1 or 2, wherein the vertical distance between the location for placing the tag and the conductive plate in the read/write space is greater than 0.16 times the operating wavelength of the reader/writer antenna.
4. The apparatus of claim 3, further comprising: a box body; the box wall of the box body is the conductive plate or the conductive plate is arranged on the inner surface of the box wall of the box body; a nonmetal inner container is arranged in the box body, an interlayer is arranged between the nonmetal inner container and the conductive plate, and the reader-writer antenna is located in the interlayer.
5. The device of claim 4, wherein the box has an opening, and the opening has a shielding curtain.
6. The device of claim 5, wherein the non-metallic inner container is detachably connected to the box body, the front end of the non-metallic inner container is clamped to the opening, and the rear end of the non-metallic inner container is clamped to the rear side wall of the box body.
7. The device of claim 6, wherein the conductive plates in the box are disposed vertically and/or horizontally, and the reader/writer antennas on different conductive plates disposed opposite to each other are disposed in a criss-cross manner.
8. The device of claim 7, wherein a reader is disposed in the housing, the reader is connected to the reader antenna, and an interface for connecting a reader power source and a communication device is disposed on a sidewall of the housing.
9. A method for enhancing the read-write capability of RFID group labels is characterized by comprising the following steps:
arranging two parallel conductive plates to form a read-write space for reading and writing a label between the two conductive plates;
the reader-writer antenna positioned in the reading-writing space emits working waves vertical to the conductive plates and reflects forward superposition for multiple times between the two conductive plates to enhance the power density between the two conductive plates, so that a label placed in the reading-writing space is read and written;
and the vertical distance between the reader-writer antenna and the conductive plates and the vertical distance between the two conductive plates are integral multiples of the working wavelength of the reader-writer antenna.
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| CN202010716369.8A CN111814507A (en) | 2020-07-23 | 2020-07-23 | Device and method for enhancing read-write capability of RFID group tag |
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| CN202010716369.8A CN111814507A (en) | 2020-07-23 | 2020-07-23 | Device and method for enhancing read-write capability of RFID group tag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112348139A (en) * | 2021-01-08 | 2021-02-09 | 山东欧龙电子科技有限公司 | Tool management operation table, system and method based on RFID (radio frequency identification device) label identification |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427896A (en) * | 2018-03-22 | 2018-08-21 | 李卫星 | Enhance device, method and the intelligent device of making an inventory of RFID tag literacy |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427896A (en) * | 2018-03-22 | 2018-08-21 | 李卫星 | Enhance device, method and the intelligent device of making an inventory of RFID tag literacy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112348139A (en) * | 2021-01-08 | 2021-02-09 | 山东欧龙电子科技有限公司 | Tool management operation table, system and method based on RFID (radio frequency identification device) label identification |
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Application publication date: 20201023 |