CN113642347A - Read-write device and read-write method for radio frequency tag - Google Patents
Read-write device and read-write method for radio frequency tag Download PDFInfo
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- G—PHYSICS
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- 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
- G06K7/10198—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 setting parameters for the interrogator, e.g. programming parameters and operating modes
- G06K7/10207—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 setting parameters for the interrogator, e.g. programming parameters and operating modes parameter settings related to power consumption of the interrogator
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
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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
- G06K7/10297—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 arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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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
- G06K7/10316—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 using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10326—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 using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the very-near field type, e.g. capacitive
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- 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
- G06K7/10316—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 using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10346—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 using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the far field type, e.g. HF types or dipoles
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Abstract
The invention provides a radio frequency tag reading and writing device and a reading and writing method which can meet the industrial field requirements. The read-write device of the radio frequency tag comprises a write-in module and a read module: the writing module writes the radio frequency label by adopting a near-field low-frequency radio frequency signal; the reading module adopts far-field high-frequency radio frequency signals to perform scanning reading on the radio frequency tag, and the reading module further comprises: and the power regulator is used for regulating the transmitting power of the reading module from high to low in the reading process. The technical scheme utilizes different characteristics of the radio frequency tags with different frequencies to prevent error writing, utilizes different powers and different beam directions to eliminate the radio frequency tags within a non-working range, improves the read-write reliability of the radio frequency tags to a high level, and can completely achieve automatic management of warehouse entry and exit.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a read/write apparatus and a read/write method for a radio frequency tag.
Background
The application of passive rf tags has been very popular, but since the energy of the passive tags comes from the remote wireless transmission, the passive tags fail when the antenna direction of the tags is not coupled with the polarization direction of the arriving rf signals, and cannot respond correctly to the read/write signals. The problem of missed reading can be relieved by simply increasing the radio frequency transmission power and increasing the polarization direction, but the label which is not processed in an expected way outside the working range can be misread or wrongly written, and the management of the database is failed.
In the prior art, a method for solving the problems is to establish a radio frequency shielding room in a read-write field of a radio frequency tag, and the read-write tag is only carried out in the shielding room. Although the method can solve most problems, the investment cost is high, the requirement on the occupied area of a production line is high, and the method cannot be met on an industrial field.
Disclosure of Invention
The invention aims to solve the technical problem of providing a radio frequency tag reading and writing device and a reading and writing method which can meet the industrial field requirements.
In order to solve the above problems, the present invention provides a read/write device for a radio frequency tag, which includes a write module and a read module: the writing module writes the radio frequency label by adopting a near-field low-frequency radio frequency signal; the reading module adopts far-field high-frequency radio frequency signals to perform scanning reading on the radio frequency tag, and the reading module further comprises: and the power regulator is used for regulating the transmitting power of the reading module from high to low in the reading process.
Optionally, the reading module further includes a phase delayer, configured to delay the plurality of antenna signals in the reading module by different phases to form a directional change of the synthesized beam.
Optionally, the device further comprises a selection module, connected to the write module and the read module, for selecting one of the write module and the read module to operate.
Optionally, the near-field low-frequency radio frequency signal is 125 ± 5% kHz or 13.56 ± 5% MHz, and the far-field high-frequency radio frequency signal is 900 ± 5% MHz.
In order to solve the above problems, the present invention provides a method for reading and writing a radio frequency tag, comprising a writing stage and a reading stage, wherein the writing stage writes the radio frequency tag by using a near-field low-frequency radio frequency signal; the readout phase further comprises: the radio frequency tag is scanned and read successively by adopting far-field high-frequency radio frequency signals in a way of adjusting the power of the read signal from high to low; and stopping reducing the power when the difference of the number of the two adjacent read radio frequency tags is larger than a preset threshold value.
Optionally, the rf tag is scanned and read using a plurality of antennas each having a different phase to form a composite beam.
The technical scheme utilizes different characteristics of the radio frequency tags with different frequencies to prevent error writing, utilizes different powers and different beam directions to eliminate the radio frequency tags within a non-working range, improves the read-write reliability of the radio frequency tags to a high level, and can completely achieve automatic management of warehouse entry and exit. In the process of selecting the double-frequency radio frequency tag, two frequency bands of 13.56MH and 900MHz can be selected, a user can directly read and write by using an NFC module arranged in the mobile phone, and the user can read a range of 15 meters far away, so that the problem of reading missing in and out of a warehouse can be solved.
Drawings
Fig. 1 is a schematic structural diagram of a read/write apparatus for a radio frequency tag according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating modulation of the phase modulation principle of the rf signal according to an embodiment of the present invention.
Fig. 3 shows the gain variation caused by the parallel arrangement of 5 non-directional antenna elements according to an embodiment of the present invention.
Detailed Description
The following describes in detail a specific embodiment of a read/write apparatus and a read/write method for a radio frequency tag according to the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a read-write apparatus of a radio frequency tag according to this embodiment. The apparatus includes a write module 11, a read module 12, and a selection module 13. The writing module 11 writes the radio frequency tag by using a near-field low-frequency radio frequency signal. The reading module 12 performs scanning reading on the radio frequency tag by using a far-field high-frequency radio frequency signal. In this embodiment, the reading module 12 further includes: a power adjuster 121 for adjusting the transmission power of the reading module from high to low during reading, and a phase delayer 122 for delaying the plurality of antenna signals in the reading module by different phases to form a directional change of the synthesized beam. The selection module 13 is connected to the write module 11 and the read module 12 for selecting one of them to work.
When the device is used for writing, the writing module 11 adopts a low-frequency passive radio frequency tag with a short reading and writing distance, such as a 125k +/-5% kHz or 13.56 +/-5% MHz radio frequency tag, so that the radio frequency energy is extremely attenuated along with the distance change, and the error writing of other radio frequency tags outside the working range is not easy to occur. When reading the tag, the reading module 12 reads the tag by using the UHF radio frequency tag with a long distance, and continuously adjusts the transmission power of the reader/writer from high to low during the reading process.
For example, in the production process of industrial products, the writing module 11 may be used to write to the rf tag, and the rf tag is written using an HF band, for example, 13.56 ± 5% MHz, and the written content includes an HF tag specific storage area and a common area shared by the HF band and the UHF band. At this time, because the attenuation speed of HF frequency band energy transmission is very fast, the writing distance is limited to a place which is a few cm around the reader-writer, and therefore, the error writing of other radio frequency tags can not be caused. When the product leaves the production line and enters and exits the warehouse, dozens of products often enter and exit the entrance guard of the warehouse on a forklift or a trailer at the same time. The sticking positions of the tags are different, if the tags are still read by adopting 13.56 +/-5% MHz, the radio frequency tags have different angles relative to the reader-writer and different distances, and the tags in both near ISO14443 and far ISO15693 specifications cannot ensure that goods can be accurately read in and out of the warehouse. At this time, the selection module 13 switches the device to the reading module 12 to work, a UHF frequency band is adopted, and by using radio frequency tag specifications such as ISO18000-6B or ISO18000-6C, the working range of a typical UHF radio frequency tag reader-writer exceeds 10m, is far away and can even reach 30m, the missing reading rate is greatly reduced, and the one-time accuracy of goods entering and exiting the warehouse is improved. In the process of selecting the double-frequency radio frequency tag, two frequency ranges of 13.56 +/-5% MH and 900 +/-5% MHz can be selected, a user can directly read and write by using an NFC module built in a mobile phone, and the user can read a range which is as far as 15 meters and the problem of reading missing in and out of a warehouse can be solved.
Further, in order to improve the reading efficiency, the phase delayer 122 may delay the plurality of antenna signals at different phases at the same time, so as to artificially form a directional change of the synthesized beam. The probability that the radio frequency tag outside the working range is read for multiple times is greatly reduced, and conversely, the radio frequency tag which is stably read in multiple times of reading and writing can be confirmed as the tag which is determined to be in the working range. The principle of the anisotropic variable gain antenna array is that one path of radio frequency signal is output to one antenna, and a phase delay is added to the other antenna for output. The two paths of same-frequency signals can generate a fixed strengthening or weakening phenomenon at any point far away, and the signals in some directions are strengthened and the signals in some directions are weakened. The emission source sequentially turns on the antenna switches through the antenna switches to form a multi-antenna time-sharing multiplexing scanning mode.
Fig. 2 shows that one radio frequency signal is output and transmitted through ant1, one radio frequency signal is delayed by a certain phase angle phase shift by a phase delay assembly and then is added to ant2, and finally, signals transmitted by two antennas reach a point P, namely sin ω and sin (ω t + σ + phase shift), wherein σ is a phase difference caused by a path difference between ant1 and ant2 reaching the point P, and the phase shift phase is manually input by a phase delay circuit. It is known that a single non-directional antenna in a multi-antenna arrangement, transmitting at the same time, results in significant anisotropy, i.e. the equivalent gain varies from direction to direction and the difference is large. Fig. 3 shows the gain variation caused by the parallel arrangement of 5 non-directional antenna elements.
The power regulator 121 is used to adjust the transmission power of the reading module from high to low during reading. When the Tag is read, a plurality of radio frequency tags are read at the same time by adopting a preset large power, the tags are recorded (Tag0, Tag1 and … … Tagn), then the phase delay combination of the multi-antenna network is changed, the gains in different directions are changed, the tags are read again (Tag0a, Tag1a, … … Tagna), (Tag0b, Tag1b and … … Tagnb), and the like, and the tags are read for a plurality of preset directions for a plurality of times, wherein the selection principle of the directions is that the Tag misreading should not occur at the place with the maximum gain. Then, the power is reduced, the Tag is read and credited (Tag0P1, Tag1P1, … … TagnP1), and the power is reduced continuously and the Tag is read and credited (Tag0P2, Tag1P2, … … TagnP 2). The power selection principle is changed from high to low, the single reduction is 1-3 dB, and when the rate of missed reading is higher than a preset threshold value, for example 10%, the boundary position is read, namely the reading can be stopped. When the times of occurrence of the misread Tag Tagq are far lower than those of the normal tags 0-Tagn, a read frequency cutoff number can be set to exclude the misread long-distance tags.
The device can also be used for implementing a read-write method of the radio frequency tag, and comprises a write-in stage and a read-out stage, wherein the write-in stage adopts a near-field low-frequency radio frequency signal to write in the radio frequency tag; the readout phase further comprises: the radio frequency tag is scanned and read successively by adopting far-field high-frequency radio frequency signals in a way of adjusting the power of the read signal from high to low; and stopping reducing the power when the difference of the number of the two adjacent read radio frequency tags is larger than a preset threshold value.
The technical scheme utilizes different characteristics of the radio frequency tags with different frequencies to prevent error writing, utilizes different powers and different beam directions to eliminate the radio frequency tags within a non-working range, improves the read-write reliability of the radio frequency tags to a high level, and can completely achieve automatic management of warehouse entry and exit.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The reading and writing device of the radio frequency tag is characterized by comprising a writing module and a reading module:
the writing module writes the radio frequency label by adopting a near-field low-frequency radio frequency signal;
the reading module adopts far-field high-frequency radio frequency signals to perform scanning reading on the radio frequency tag, and the reading module further comprises:
and the power regulator is used for regulating the transmitting power of the reading module from high to low in the reading process.
2. The device as claimed in claim 1, wherein the reading module further comprises a phase delayer for delaying the plurality of antenna signals in the reading module by different phases to form the directional change of the synthesized beam.
3. The rf tag reader/writer apparatus according to claim 1, further comprising a selection module connected to the write module and the read module for selecting one of them to operate.
4. The rf tag reader/writer according to claim 1, wherein the near-field low-frequency rf signal is 125 ± 5% kHz or 13.56 ± 5% MHz, and the far-field high-frequency rf signal is 900 ± 5% MHz.
5. The reading and writing method of the radio frequency tag is characterized by comprising a writing stage and a reading stage, wherein the writing stage adopts a near-field low-frequency radio frequency signal to write the radio frequency tag;
the readout phase further comprises:
the radio frequency tag is scanned and read successively by adopting far-field high-frequency radio frequency signals in a way of adjusting the power of the read signal from high to low;
and stopping reducing the power when the difference of the number of the two adjacent read radio frequency tags is larger than a preset threshold value.
6. A method as claimed in claim 1, wherein the rf tag is scanned by using a plurality of antennas each having a different phase to form a composite beam.
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| CN202110762949.5A CN113642347A (en) | 2021-07-06 | 2021-07-06 | Read-write device and read-write method for radio frequency tag |
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| CN202110762949.5A CN113642347A (en) | 2021-07-06 | 2021-07-06 | Read-write device and read-write method for radio frequency tag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116704689A (en) * | 2023-07-24 | 2023-09-05 | 成都西谷曙光数字技术有限公司 | Passive anti-theft electronic tag system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369319A (en) * | 2008-10-14 | 2009-02-18 | 复旦大学 | Active radio frequency identification tag |
| CN102496048A (en) * | 2011-11-28 | 2012-06-13 | 浙江网新技术有限公司 | Multi-frequency RFID (radio identification) label, read/write device and read/write method |
| CN103714309A (en) * | 2013-12-12 | 2014-04-09 | 苏州斯普锐智能系统有限公司 | Integrated wireless barcode and radio frequency reading device |
| CN110456303A (en) * | 2018-05-08 | 2019-11-15 | 上海瑞章物联网技术有限公司 | The positioning system of RFID label tag |
| CN112580377A (en) * | 2020-12-21 | 2021-03-30 | 江门市得实计算机外部设备有限公司 | Radio frequency power calibration method, device, equipment and storage medium |
-
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- 2021-07-06 CN CN202110762949.5A patent/CN113642347A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369319A (en) * | 2008-10-14 | 2009-02-18 | 复旦大学 | Active radio frequency identification tag |
| CN102496048A (en) * | 2011-11-28 | 2012-06-13 | 浙江网新技术有限公司 | Multi-frequency RFID (radio identification) label, read/write device and read/write method |
| CN103714309A (en) * | 2013-12-12 | 2014-04-09 | 苏州斯普锐智能系统有限公司 | Integrated wireless barcode and radio frequency reading device |
| CN110456303A (en) * | 2018-05-08 | 2019-11-15 | 上海瑞章物联网技术有限公司 | The positioning system of RFID label tag |
| CN112580377A (en) * | 2020-12-21 | 2021-03-30 | 江门市得实计算机外部设备有限公司 | Radio frequency power calibration method, device, equipment and storage medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116704689A (en) * | 2023-07-24 | 2023-09-05 | 成都西谷曙光数字技术有限公司 | Passive anti-theft electronic tag system |
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