CN102436597A - Visual passive RFID electronic tag and identity recognition method thereof - Google Patents
Visual passive RFID electronic tag and identity recognition method thereof Download PDFInfo
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Abstract
The invention discloses a visual passive RFID electronic tag which comprises an antenna, an RFID chip and a display module, wherein the antenna is used for receiving and sending radio frequency signals, the RFID chip is used for responding to operation instructions in the received radio frequency signals and converting response results into radio frequency signals for feedback sending, and the display module is used for displaying the radio frequency signals. The display module comprises a control unit for generating data information and a display unit for displaying the data information, and the display module is directly or indirectly powered through the antenna. The invention also provides an identity identification method of the visual passive RFID electronic tag, which can provide visual prompts for operators while inquiring and/or updating the electronic tag, thereby finding the electronic tag more quickly. In addition, the display module is directly or indirectly powered through the antenna, so that additional energy storage equipment is not needed, the design of the electronic tag is simplified, and the space is saved.
Description
Technical Field
The invention relates to a passive RFID electronic tag, in particular to a visual passive RFID electronic tag and an identity identification method thereof.
Background
The existing paper label or bar code is easily affected by factors such as surrounding environment, manual operation and the like, so that the label is aged or damaged, and great hidden danger is brought to installation and maintenance work. Radio Frequency Identification (RFID) is a non-contact automatic identification technology that automatically identifies an object and acquires desired data by radio frequency signals. RFID tags are the heart of radio frequency identification technology. The RFID electronic tags are divided into active RFID electronic tags and passive RFID electronic tags. The mainstream RFID electronic tags in the market at present are passive RFID electronic tags. The passive RFID electronic tag is not provided with a direct power supply device, all electric energy required by the passive RFID electronic tag is obtained by depending on received radio frequency energy sent by a reader-writer, and the working mode of the passive RFID electronic tag is divided into two conditions: for high-frequency RFID, based on the inductive coupling theory, a passive RFID electronic tag works in a near-field area of an electromagnetic field emitted by a reader-writer, an antenna is similar to a coupling coil of a transformer, and a chip of the RFID electronic tag and the reader-writer realize energy transmission through the coupling effect between the antenna coils; the ultrahigh frequency RFID is based on an electromagnetic coupling theory, an electronic tag of the ultrahigh frequency RFID works in a far field area of an electromagnetic field sent by a reader-writer, an antenna can be equivalent to a current source, and the RFID chip and the reader-writer realize energy transmission through an alternating electromagnetic field. In the two situations, an induced electromotive force difference is generated at two ends of the receiving antenna, so that a weak current is formed in a chip path, and if the intensity of the current reaches a certain threshold value, the passive RFID chip is activated to work, so that the read/write operation of a memory in the tag chip is realized. However, in the process of identification, there is not only one RFID tag in a certain spatial area, and when one of the RFID tags is queried, the instant reader/writer may identify the RFID tag, for example, display the number of the RFID tag, but the operator cannot find the RFID tag at the first time. In response to this problem, the existing method provides a sound prompt, such as a beep, after the RFID tag is queried, but the sound recognition is far from the visual recognition, which is fast, accurate and direct.
Disclosure of Invention
The invention aims to solve the technical problems that a visual prompt cannot be provided by a passive RFID electronic tag in the prior art and power supply is inconvenient, and provides a visual passive RFID electronic tag and an identity identification method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: a visual passive RFID electronic tag comprises
An antenna for receiving and transmitting radio frequency signals;
the RFID chip is used for responding to the received operation instruction in the radio frequency signal and converting a response result into a radio frequency signal for feedback transmission; wherein,
the visual passive RFID electronic tag further comprises a display module, wherein the display module comprises a control unit used for generating data information and a display unit used for displaying the data information;
the antenna is coupled with the display module for powering the display module.
In the visual passive RFID tag according to an embodiment of the present invention, the RFID chip and the display module block are both directly connected to the antenna, and are configured to be powered by a radio frequency signal received by the antenna.
In the visual passive RFID tag according to an embodiment of the present invention,
the antenna includes a first antenna and a second antenna, wherein,
the RFID chip is directly connected with the first antenna and used for supplying power through a radio frequency signal received by the first antenna;
the display module is directly connected with the second antenna and used for supplying power through the radio-frequency signals received by the second antenna.
In the visual passive RFID tag according to an embodiment of the present invention,
the RFID chip is connected with the antenna and used for supplying power through a radio frequency signal received from the antenna;
the RFID chip is also connected with the control unit and used for supplying power to the display module.
In the visual passive RFID tag according to an embodiment of the present invention,
the display module and the RFID chip are connected in series and then are connected to two ends of the antenna, and the display module and the RFID chip are powered simultaneously through the radio frequency signal received by the antenna.
In the visual passive RFID tag according to an embodiment of the present invention, the display module includes a first display module and a second display module, and the first display module and the second display module are respectively connected to the antenna and the RFID chip.
In the visual passive RFID tag according to the embodiment of the present invention, the RFID chip generates a display enable signal based on the response result, and sends the display enable signal to the control unit to control the display of the display unit.
In the visual passive RFID tag according to an embodiment of the present invention, the control unit is connected to the RFID chip, and is configured to generate the data information according to a response result generated by the RFID chip.
In the visual passive RFID tag according to an embodiment of the present invention, the operation instruction is an instruction for querying and/or updating identity information of the visual passive RFID tag.
In the visual passive RFID tag according to an embodiment of the present invention, the control unit generates the data information according to a radio frequency signal received by the antenna.
In the visual passive RFID tag according to an embodiment of the present invention, the display unit is a display indicator and/or a display screen.
In the visual passive RFID tag according to an embodiment of the present invention, the data information is numbers, words and/or graphics.
The invention also provides an identity identification method of a visual passive RFID electronic tag, which is used for identifying the electronic identity of the visual passive RFID electronic tag as claimed in any one of claims 1-12, and comprises the following steps:
receiving a radio frequency signal through an antenna;
the RFID chip responds to the received radio frequency signal, generates a display enabling signal based on a response result and converts the response result into a radio frequency signal;
transmitting, via the antenna, a radio frequency signal related to the response result, and, at the same time,
and the control unit of the display module generates data information based on the response result and/or the display enabling signal and displays the data information through the display unit.
The invention has the following beneficial effects: the visual passive RFID electronic tag is provided with the display module, so that visual prompts can be provided for operators in the processes of identity recognition and information updating. In addition, the display module is directly or indirectly powered through the antenna, so that additional energy storage equipment is not needed, the design of the electronic tag is simplified, and the space is saved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a logical block diagram of a visual passive RFID tag in a first embodiment of the present invention;
FIG. 2 is a logic block diagram of an improved visual passive RFID tag of FIG. 1;
FIG. 3 is a logic block diagram of a visualization passive RFID electronic tag in a second embodiment of the present invention;
FIG. 4 is a logic block diagram of a visual passive RFID tag modified from FIG. 3;
FIG. 5 is a logic block diagram of a visualization passive RFID electronic tag in a third embodiment of the present invention;
FIG. 6 is a logic block diagram of a visual passive RFID tag in a fourth embodiment of the present invention;
fig. 7 is a logic block diagram of a visual passive RFID tag modified from that of fig. 6.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The visual passive RFID electronic tag 100 according to the embodiment of the present invention includes an antenna 110 and an RFID chip 120, and the antenna 110 is configured to receive a radio frequency signal from a reader/writer and send a feedback radio frequency signal to the reader/writer, similar to the existing passive RFID electronic tag 100. The RFID chip 120 is configured to respond to an operation instruction in the received radio frequency signal, and convert the response result into a radio frequency signal for feedback and sending back to the reader. For example, the RFID chip 120 is configured to respond to a radio frequency signal received from the reader/writer to pair identity information stored in the RFID chip 120, so as to obtain a pairing result, and convert the pairing result into a radio frequency signal for feeding back to the reader/writer; or write new information or modify information in the RFID chip 120 according to the received radio frequency signal, thereby completing the change of the specified information, and the like.
In addition to the above, the visual passive RFID tag 100 according to the embodiment of the present invention further includes a display module 130, where the display module 130 includes a control unit 131 for generating data information and a display unit 132 for displaying the data information. The display unit 132 displays an indicator or a display screen, such as a physical device like a light emitting diode, an organic electroluminescent display, a plasma, a liquid crystal, an electrophoretic display, or a discharge tube; contains fluorescent agent and diphenyl anthracene electrochemical substance; luciferase bioluminescent substances and the like. The data information can be either a command signal indicating the opening of the display indicator or digital, text and/or graphic information related to the electronic identification which can be displayed on the display screen. The display module 130 is coupled with an antenna so that power can be supplied directly or indirectly through the antenna.
The visual passive RFID tag 100 according to an embodiment of the present invention will be described in detail in a specific embodiment with reference to the drawings, but it should be understood that the following embodiment is only for illustrative purposes and is not intended to limit the present invention.
First embodiment
As shown in fig. 1, in this embodiment, the control units 131 of the RFID chip 120 and the display module 130 are respectively connected to two ends of the antenna 110, so that the RFID chip 120 and the display module 130 are respectively powered by the radio frequency energy carried in the radio frequency signal received by the antenna 110 from the reader/writer, thereby driving the normal operation of the two. In this case, the antenna 110 is equivalent to a current source, the display module 130 and the RFID chip 120 are connected in parallel and then connected to the current source, and the display module 130 and the RFID chip 120 are independent from each other in terms of power supply. Meanwhile, the RFID chip 120 receives a radio frequency signal directly from the antenna 110 and responds to the radio frequency signal, and for example, sends back a radio frequency signal related to the pairing result to the reader through the antenna 110, so that the pairing result can be displayed on the reader.
In the present embodiment, the control unit 131 of the display module 130 generates data information according to the radio frequency signal received by the antenna 110, for example, when the potential difference generated by the radio frequency signal received by the antenna 110 exceeds a preset threshold voltage, the control unit 131 may generate data information based on this, for example, instruct the display indicator to light, thereby prompting the operator that the tag has responded to the operation signal sent by the reader/writer. However, this display method has a disadvantage that, in the display, as long as the energy received by the display module 130 is enough, the display can be performed, that is, after the reader/writer sends an operation signal, a plurality of electronic tags 100 may be displayed simultaneously, but only one of the electronic tags 100 is matched, so that the display method can only screen a part of the electronic tags 100, and then perform final confirmation by other methods, such as voice prompt, etc.
Fig. 2 shows a preference of the present embodiment, in which the RFID chip 120 generates a display enable signal according to the pairing result, for example, generates the display enable signal when the pairing is successful; and sends the display enable signal to the control unit 131 to control the display of the display unit 132, for example, the control unit 131 only receives the display enable signal to instruct the display unit 132 to display, regardless of whether the potential difference generated by the radio frequency signal exceeds the threshold voltage of the control unit 131. With this arrangement, the displayed electronic tag 100 is unique and definitive. Of course, the control unit 131 may be connected to the RFID chip 120 at this time, and generate data information for the display unit 132 to display according to the pairing result generated by the RFID chip 120.
In the specific implementation process of the present invention, various display modes may be adopted, for example, the display mode may be only the display mode shown in fig. 1, that is, the display mode may be displayed as long as the threshold voltage is exceeded; or the display mode in fig. 2 only, that is, the display mode is displayed only when the display enable signal is received; or a combination of the above two ways, that is, the two ways are satisfied simultaneously, and then the display unit 132 may be one or more, for example, the display indicator and the display screen operate simultaneously.
Second embodiment
The second embodiment is an improvement of the power supply method in the first embodiment, and the other embodiments are the same. In the visual passive RFID electronic tag 100 according to the second embodiment, as shown in fig. 3, the antenna 110 includes a first antenna 111 and a second antenna 112, wherein the RFID chip 120 is connected to the first antenna 111, and the display module 130 is connected to the second antenna 112 through the control unit 131. Thus, the RFID chip 120 supplies power through the radio frequency signal received by the first antenna 111, and receives the radio frequency signal from the reader/writer through the first antenna 111 and transmits a feedback radio frequency signal to the reader/writer. In addition, the display module 130 is powered by the rf signal received by the second antenna 112. In this embodiment, the RFID chip 120 and the display module 130 are respectively powered by the first antenna 111 and the second antenna 112, which are independent of each other, and compared with the first embodiment, the power of the antenna can be reduced, and the power supply process is more stable.
In addition, in the specific implementation process of this embodiment, various display modes may still be adopted, and although only one of them is shown in fig. 3, that is, the display mode may be performed as long as the threshold voltage is exceeded, improvements or substitutions may also be performed on the basis, for example, as shown in fig. 4, the display mode may be performed only when the display enable signal is received; or a combination of the above two ways, that is, the two ways are satisfied simultaneously, and then the display unit 132 may be one or more, for example, the display indicator and the display screen operate simultaneously.
Third embodiment
As shown in fig. 5, in this embodiment, the RFID chip 120 is connected to the antenna 110 and the display module 130, respectively. On one hand, the RFID chip 120 performs its own power supply by the radio frequency signal received by the antenna 110, and transmits and receives the radio frequency signal by the antenna 110; on the other hand, the RFID chip 120 is further provided with a power output port connected to the display module 130, so as to distribute a part of the potential difference provided by the radio frequency signal to the display module 130, and when the distributed potential difference is large enough, the display module 130 can be driven to operate. In this power supply method, only the RFID chip 120 is connected to the antenna 110, and the display module 130 is supplied with power through the RFID chip 120. Of course, the control unit 131 may be connected to the RFID chip 120 at this time, and generate data information for the display unit 132 to display according to the pairing result generated by the RFID chip 120.
In the visual manner of this embodiment, various display manners can still be adopted, for example, display can be performed as long as the threshold voltage is exceeded; or the display can be performed only when the display enabling signal is received; or a combination of the above two ways, that is, the two ways are satisfied simultaneously, and then the display unit 132 may be one or more, for example, the display indicator and the display screen operate simultaneously.
Fourth embodiment
As shown in fig. 6, the display module 130 and the RFID chip 120 are connected in series and then connected to two ends of the antenna 110, so in this power supply mode, the antenna 110 serving as a current source simultaneously supplies power to the display module 130 and the RFID chip 120, and at this time, only when the potential difference provided by the antenna 110 exceeds the sum of the operating voltages of the display module 130 and the RFID chip 120, the display module 130 and the RFID chip 120 can normally operate, so the antenna 110 with higher power is required in this embodiment. In addition, the RFID chip 120 still transmits and receives radio frequency signals via the antenna 110 for polling and/or updating operations. Of course, the control unit 131 may be connected to the RFID chip 120 to generate data information for the display unit 132 to display according to the pairing result generated by the RFID chip 120
Fig. 7 shows a modification of the electronic tag 100 shown in fig. 6, and as shown in fig. 7, the display module 130 includes a first display module 130 and a second display module 230, and the second display module 230 also includes a control unit 231 and a display unit 232, wherein the first display module 130 and the second display module 230 are connected to the antenna 110 and the RFID chip 120, respectively. Thus, the antenna 110 as a current source simultaneously supplies power to the first and second display modules and the RFID chip 120, and the first and second display modules and the RFID chip 120 can normally operate only when the potential difference provided by the antenna 110 exceeds the sum of the operating voltages of the two display modules and the RFID chip 120. In this way, a variety of visual cues may be provided to the operator.
In the visual manner of this embodiment, various display manners can still be adopted, for example, the display module 130 can display only when the threshold voltage is exceeded; or the display can be performed only when the display enabling signal is received; or a combination of the above two ways, that is, the two ways are satisfied simultaneously, and then the display unit 132 may be one or more, for example, the display indicator and the display screen operate simultaneously.
In the process of carrying out electronic identity recognition on the visual passive RFID electronic tag according to the embodiment of the invention, firstly, a radio frequency signal is received from a reader-writer through an antenna, wherein the radio frequency signal comprises an operation instruction and carries energy, so that the antenna can be used as a current source for other parts in the electronic tag to work. Then, the RFID chip responds to the received radio frequency signal to pair the internally stored identity information to obtain a pairing result, on one hand, the pairing result needs to be fed back to the reader-writer, so that the RFID chip converts the pairing result into a radio frequency signal and sends the radio frequency signal back to the reader-writer through antenna feedback, and an operator can know the pairing result; on the other hand, the RFID chip can generate data information based on the pairing result and send the data information to the display module for the display module to display, and/or generate a display enabling signal based on the pairing result and send the display enabling signal to the display module to control whether the display unit can display or not. And then, the antenna feeds back the radio-frequency signal related to the pairing result to the reader-writer, and meanwhile, the control unit of the display module generates data information based on the pairing result and/or the display enabling signal and displays the data information through the display unit, so that visual prompt is provided for an operator, and the operator can find the electronic tag at the first time.
The various visual passive RFID tags 100 described above may be used in a variety of applications, for example, the visual passive RFID tags 100 according to embodiments of the present invention may be disposed on a fiber optic plug of a fiber optic cable. When a reader-writer wants to find an appointed or matched optical fiber plug in a plurality of optical fiber plugs on an optical distribution frame, firstly, the reader-writer sends a radio frequency signal containing a query instruction to search; after finding the specified or matched optical fiber plug, the visual passive RFID tag 100 arranged in the optical fiber plug sends a feedback radio frequency signal to the reader-writer, and at the same time, the display unit of the electronic tag 100 starts to work, including the display indicating device is turned on and/or the display screen starts to display. Therefore, an operator can find the optical fiber plug matched with the optical fiber plug at a glance from the plurality of optical fiber plugs, so that the process of searching again is omitted, the operation is simplified, and the efficiency is improved.
As can be seen from the above, the display module is arranged in the visual passive RFID tag according to the embodiment of the present invention, so that an intuitive visual prompt can be provided for an operator during the process of identity recognition and information update. In addition, the display module is directly or indirectly powered through the antenna, so that additional energy storage equipment is not needed, the design of the electronic tag is simplified, and the space is saved. In addition, the display module can be displayed as an indicator, and can also display detailed information related to the pairing result, so that the display content is rich and various. In addition, the display of the display module can be controlled by the RFID chip transmitting a display enable signal, so that the display of the display module can be unique and definite.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (14)
1. A visual passive RFID electronic tag comprises
An antenna for receiving and transmitting radio frequency signals;
the RFID chip is used for responding to the received operation instruction in the radio frequency signal and converting a response result into a radio frequency signal for feedback transmission; it is characterized in that the preparation method is characterized in that,
the visual passive RFID electronic tag further comprises a display module, wherein the display module comprises a control unit used for generating data information and a display unit used for displaying the data information;
the antenna is coupled with the display module for powering the display module.
2. The visual passive RFID tag of claim 1, wherein the RFID chip and the display module block are both directly connected to the antenna for supplying power via radio frequency signals received by the antenna.
3. The visual passive RFID tag of claim 2,
the antenna includes a first antenna and a second antenna, wherein,
the RFID chip is directly connected with the first antenna and used for supplying power through a radio frequency signal received by the first antenna;
the display module is directly connected with the second antenna and used for supplying power through the radio-frequency signals received by the second antenna.
4. The visual passive RFID tag of claim 1,
the RFID chip is directly connected with the antenna and used for supplying power through a radio frequency signal received from the antenna;
the RFID chip is also connected with the control unit and used for supplying power to the display module.
5. The visual passive RFID tag of claim 1,
the display module and the RFID chip are connected in series and then are connected to two ends of the antenna, and the display module and the RFID chip are powered simultaneously through the radio frequency signal received by the antenna.
6. The visual passive RFID tag of claim 5, wherein the display module comprises a first display module and a second display module, each connected to the antenna and the RFID chip, respectively.
7. The visual passive RFID tag of any one of claims 1-6, wherein the RFID chip generates a display enable signal based on the response result and sends the display enable signal to the control unit to control the display of the display unit.
8. The visual passive RFID tag of any one of claims 1-6, wherein the control unit is coupled to the RFID chip for generating the data information based on a response result generated by the RFID chip.
9. A visual passive RFID tag according to any of claims 1-6, characterized in that the operation instruction is an instruction to query and/or update identity information of the visual passive RFID tag.
10. The visual passive RFID tag of any of claims 2-4, wherein the control unit generates the data information from a radio frequency signal received by the antenna.
11. The visual passive RFID tag of claim 1, wherein the display unit is a display indicator and/or a display screen.
12. The visual passive RFID tag of claim 11, wherein the data information is a number, text and/or graphic.
13. A fiber optic cable, wherein a fiber optic plug of the fiber optic cable is provided with the visual passive RFID tag of any one of claims 1-12.
14. An identity identification method of a visual passive RFID electronic tag, which is used for identifying the electronic identity of the visual passive RFID electronic tag of any one of claims 1-12, and comprises the following steps:
receiving a radio frequency signal through an antenna;
the RFID chip responds to the received radio frequency signal, generates a display enabling signal based on a response result and converts the response result into a radio frequency signal;
transmitting, via the antenna, a radio frequency signal related to the response result, and, at the same time,
and the control unit of the display module generates data information based on the response result and/or the display enabling signal and displays the data information through the display unit.
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