A method and system for batch coding using RFID group reading technology

Abstract

The present invention relates to a method and system for batch coding using RFID group reading technology, which not only has a fast coding rate, but also has a high coding efficiency, and can quickly eliminate invalid coding tags. A file containing the initial EPC code is imported, and the content is stored in the cache and displayed in the form of multiple linked lists; then the coding controller performs full inspection and counting on the tags to be coded to achieve group reading of the tags; then the coding controller randomly grabs the initial EPC code in multiple linked lists and exchanges the initial EPC code in the linked list with the EPC code of the group-read tags to achieve batch coding operation of the tags. Advantages: First, this method realizes fast batch coding of tags through group reading technology and automatic grabbing and chaotic matching technical means; second, this method uses a loop matching means for detection to ensure that 100% of the tags put into use are coded; third, this method uses a binary search means to find out defective tags, thereby improving the utilization rate of tags.

Description

Technical Field

[0001] The present invention belongs to the technical field of radio frequency identification, and particularly relates to a method and system for batch coding using RFID group reading technology. Background Art

[0002] UHF RFID chips often come with their own codes, but in various application scenarios, the tags still need to be recoded according to the requirements of this software application, which is called coding. Conventional coding is to automatically code one by one in sequence to ensure that each RFID chip is successfully written without wrong writing or duplicate writing; however, coding one by one has a large workload, and because the RFID reading range is large and the reading speed is fast, it is very easy to code the tags next to them, resulting in the tags that need to be coded not being successfully written, while the tags misread next to them are coded. Therefore, there are often many phenomena of missing codes, duplicate codes, and wrong codes (not fully written successfully).

[0003] Currently, the coding methods on the market focus on one-to-one coding, that is, reading the code of a tag, and then finding the corresponding code that needs to be updated in the software and covering it one by one; while the batch method only changes the manual one-by-one placement into an automated assembly line placement. In this process, because it must be one-to-one, there may be:

[0004] 1. Duplicate codes: That is, the placed tag and the tag next to it are simultaneously read by the reader-writer, and then the system cannot distinguish which one needs to be coded, and maybe both are written simultaneously;

[0005] 2. Missing codes: Placing one by one, maybe the coding has not been successfully completed but the system thinks it is successful, resulting in one code being missed;

[0006] 3. Wrong codes: For the same reason, it may be that the nearby tag is coded instead of the tag that really needs to be coded, resulting in wrong codes.

[0007] The speed cannot be increased: This kind of coding depends on the speed of the automated assembly line matching the reading and writing speeds of the reader-writer, otherwise it is very easy to cause system chaos. Summary of the Invention

[0008] Design purpose: To avoid the deficiencies in the background art, a method and system for batch coding using RFID group reading technology are designed, which not only have a fast coding rate, but also high coding efficiency, and can quickly eliminate invalidly coded tags.

[0009] Design scheme: To achieve the above design purpose.

[0010] 1. Step 1: First, import the file containing the initial EPC code into the coding controller. The coding controller stores the content of the imported file in the cache and displays it in the form of multiple linked lists. Step 2: Then, the coding controller uses a group-reading RFID reader / writer to conduct a full inspection and counting of the tags to be coded, achieving group reading of the tags. Step 3: Next, the coding controller randomly selects from the multiple linked lists the initial EPC codes that match the number of tags after group reading and swaps the initial EPC codes in the linked lists with the EPC codes of the group-read tags, realizing the design of batch coding operation for tags, which is one of the technical features of the present invention. The purpose of this design is as follows: During batch coding, first import the file containing the initial EPC code into the coding controller. The coding controller stores the content of the imported file in the cache and displays it in the form of multiple linked lists. Then, conduct group reading on the tags to be coded for pre-coding detection and counting to ensure that all the tags to be coded are qualified tags that can be read, and at the same time determine the actual number of tags to be coded. Since the coding controller has collected the information of the tags to be coded before, after starting coding, the coding controller randomly selects the initial EPC codes that match the number of tags to be coded and swaps them with the original EPC codes in the tags to be coded, realizing batch coding operation for tags. The original information and the effective number of the tags to be coded before coding are quickly achieved through group reading technology. During coding, the coding controller realizes batch coding through means of automatic selection and chaotic matching, ensuring that the tags can be coded quickly (for 100 to 500 tags, all coding can be completed within 1 - 2 minutes), and at the same time can completely solve the problems of duplicate coding, missing coding, and wrong coding of tags caused by external factors.

[0011] 2. The coding controller is provided with a verification unit. After the batch coding of the tags is completed, the coding controller stores the EPC codes in each tag read by the group-reading RFID reader-writer into the detection list in the verification unit. The coding controller circularly matches the EPC codes in the detection list with the initially written EPC codes in the cache list. Moreover, the design that the coding controller can display the tag information with unsuccessful matching through the display interface is the second technical feature of the present invention. The purpose of such design is as follows: For some tags with relatively weak performance (which have a certain probability of being able to achieve reading and writing), although the coding controller successfully reads their data information through the group-reading RFID reader-writer during the group-reading process, during the data information writing process, the coding controller may not necessarily be able to write new data into them through the group-reading RFID reader-writer. At this time, the coding controller thinks that the tag(s) has / have successfully achieved data update, but in fact, it still retains the original data information. After the batch coding of the tags is completed, the coding controller stores the EPC codes in each tag read by the group-reading RFID reader-writer into the detection list in the verification unit. The coding controller circularly matches the EPC codes in the detection list with the initially written EPC codes in the cache list. In this way, it can be checked whether there are such tags in this batch of tags (the probability of such tags appearing is extremely low and does not occur every time of batch coding). Only the tags of the same batch that do not detect such tags will be put into use, so as to ensure that the tags put into use achieve the coding operation 100%, and the coding accuracy of the tags is guaranteed to be 100%.

[0012] 3. During the circular matching process, when the number of tags that cannot be successfully matched is less than or equal to the set number, the coding controller will perform countdown matching on these tags. The tags that still cannot be successfully matched at the end of the countdown are judged to be damaged and cannot achieve coding. This design is the third technical feature of the present invention. The purpose of such design is as follows: During the circular matching process, when the number of tags that cannot be successfully matched is less than or equal to the set number, the coding controller will perform countdown matching on these tags. The tags that still cannot be successfully matched at the end of the countdown are judged to be damaged and cannot achieve coding. In this way, while avoiding the occurrence of coding dead loops, the coding efficiency and coding accuracy are taken into account.

[0013] 4. When the EPC code of a tag that cannot be coded is displayed on the display interface, first divide all the tags into two groups. Then, the coding controller performs group reading on the two groups of tags in sequence through the group-reading RFID reader. When the EPC code of a tag that cannot be coded is included in the group of tags read by group reading, divide this group of tags into two parts. Then, the coding controller performs group reading on the divided tags in sequence through the group-reading RFID reader, gradually narrowing down the search range to achieve the design of the preliminary screening of damaged tags, which is the fourth technical feature of the present invention. The purpose of this design is as follows: when the EPC code of a tag that cannot be coded is displayed on the display interface, first divide all the tags into two groups. Then, the coding controller performs group reading on the two groups of tags in sequence through the group-reading RFID reader. When the EPC code of a tag that cannot be coded is included in the group of tags read by group reading, divide this group of tags into two parts. Then, the coding controller performs group reading on the divided tags in sequence through the group-reading RFID reader, gradually narrowing down the search range to achieve the screening of damaged tags. After screening out the damaged tags, the remaining good tags can be put into use, thereby improving the utilization rate of the tags. In addition, according to the qualified rate control of normal RFID tag production, when all tags are inspected for reading performance in the first step, the maximum probability of unsuccessful coding is below 0.5%. That is, in many batches (several times or more than ten times) of batch coding, there may be only one or two tags with unsuccessful coding in the tags of one batch of batch coding. In this way, the process of finding defective tags through binary search hardly affects the overall work efficiency.

[0014] 5. After all the tags have been subjected to multiple binary searches, a small number of tags with mixed quality are read one by one using the RFID reader to achieve the design of precise search, which is the fifth technical feature of the present invention. The purpose of this design is as follows: after all the tags have been subjected to multiple binary searches, a small number of tags with mixed quality are read one by one using the RFID reader, that is, the preliminary screening of a small number of tags is carried out through binary search, and the precise screening is carried out by reading one by one. In this way, through the rough and precise division of labor, the rapid and precise search for defective tags is achieved.

[0015] 6. When the number of tags grouped and read by the coding controller through the group-reading RFID reader / writer is greater than the set value, the coding controller will perform batch coding on the tags. During batch coding, the coding controller performs fast quantitative coding on the tags. After the coding of the set number of tags is completed, the coding controller sets the remaining tags as unsuccessful in matching. Then, the coding controller verifies this batch of tags. After the verification of the previous batch of tags, if the number of remaining tags is less than or equal to the set value, the coding controller performs batch coding on the remaining tags. Then, the coding controller verifies this batch of tags. If the number of remaining tags is greater than the set value, the coding controller performs fast quantitative coding on the tags. After the coding of the set number of tags is completed, the coding controller sets the remaining tags as unsuccessful in matching. Then, the coding controller verifies this batch of tags until the coding of all tags is completed. This design is the sixth technical feature of the present invention. The purpose of this design is as follows: When the number of tags grouped and read by the coding controller through the group-reading RFID reader / writer is greater than the set value, the coding controller will perform batch coding on the tags, which can improve the efficiency of group reading and coding, thereby further increasing the speed of effective batch coding of tags. Additionally, during the first coding, the coding controller performs fast quantitative coding on the tags. During fast coding, those tags with excellent performance will be quickly and successfully written, and the tags with relatively weak performance will be concentrated in the subsequent batches for coding. At this time, the coding speed can be relatively slower, facilitating the effective writing of these tags with relatively weak performance, thereby increasing the writing rate of effective writing. At the same time, such batch coding can effectively reduce the computing requirements of the coding controller.

[0016] 7. It further includes a metal box. An opening is provided at the front end of the metal box, and a metal shielding cloth that can be opened is provided at the opening. The metal shielding cloth can cover the entire opening. The group-reading RFID reader / writer is arranged inside the metal box, and the signal end of the group-reading RFID reader / writer is connected to the signal end of the coding controller through a data bus. This design is the seventh technical feature of the present invention. The purpose of this design is as follows: First, the metal box is made of metal material on the periphery, and the front end is a metal shielding cloth that can be opened, which isolates the tags inside the box from the tags outside the box, ensuring a pure environment for reading the tags inside the box. 100% of the grouped tags are the tags placed inside the box. Second, the metal shielding cloth is provided at the opening of the metal box, which facilitates the putting in and taking out of tags. Third, the signal end of the group-reading RFID reader / writer is connected to the signal end of the coding controller through a data bus, so that the coding controller can not only read the information of the tags through the group-reading RFID reader / writer but also write information to the tags through the group-reading RFID reader / writer.

[0017] 8. It also includes an RFID reader / writer. The design that the signal output end of the RFID reader / writer is connected to the signal input end of the code writing controller through a data line is the eighth technical feature of the present invention. The purpose of this design is that when the signal output end of the RFID reader / writer is connected to the signal input end of the code writing controller through a data line, the code writing controller 1 will give a warning when the RFID reader / writer reads the information of a defective tag, which is convenient for the staff to quickly pick it out, thereby improving the screening efficiency of the system for tags that cannot be coded.

[0018] Technical solution 1: A method for batch coding using RFID group reading technology includes the following steps: Step 1, first import a file containing the initial EPC code into the code writing controller, and the code writing controller stores the content of the imported file in the cache and displays it in the form of multiple linked lists; Step 2, then the code writing controller performs a full inspection and counting of the tags to be coded through the group reading RFID reader / writer to achieve group reading of the tags; Step 3, then the code writing controller randomly grabs the initial EPC codes in multiple linked lists that match the number of tags completed by group reading and exchanges the initial EPC codes in the linked lists with the EPC codes of the group-read tags to achieve batch coding operation of the tags.

[0019] Technical solution 2: A system for batch coding using RFID group reading technology includes a code writing controller and a group reading RFID reader / writer. It also includes a metal box. The front end of the metal box is provided with an opening, and a metal shielding cloth that can be opened is provided at the opening. The metal shielding cloth can cover the entire opening. The group reading RFID reader / writer is arranged in the metal box, and the signal end of the group reading RFID reader / writer is connected to the signal end of the code writing controller through a data bus.

[0020] Compared with the background technology, the present invention has the following advantages: First, for a method for batch coding using RFID group reading technology, the original information and the effective quantity of the tags to be coded before coding are quickly realized through group reading technology. When coding, the code writing controller realizes batch coding through means such as automatic grabbing and chaotic matching to ensure that the tags can be coded quickly; Second, a method for batch coding using RFID group reading technology uses a loop matching means for detection, thereby ensuring that 100% of the tags put into use are coded; Third, a method for batch coding using RFID group reading technology uses a binary search means to find out defective tags, so that the effective coded tags in this batch can be used in time, thereby improving the utilization rate of the tags. Description of the Drawings

[0021] Figure 1 It is a flowchart of a method for batch coding using RFID group reading technology.

[0022] Figure 2 It is a structural schematic diagram of a system for batch coding using RFID group reading technology.

[0023] Figure 3 It is a schematic cross-sectional structure diagram when the metal box and the metal shielding cloth are combined.

[0024] Figure 4 It is a schematic three-dimensional structure diagram of a metal box (with tags stacked inside the box).

[0025] Figure 5 It is a schematic cross-sectional structure diagram of the metal box. Specific implementation mode

[0026] Example 1: Refer to the appendix Figure 1 A method for batch coding using RFID group reading technology includes the following steps: Step 1, first import a file containing the initial EPC code into the coding controller, and the coding controller stores the content in the imported file in the cache and displays it in the form of multiple linked lists. Import a file of the EPC codes (including requirements such as the USER area, locking, and encryption) of the tags to be coded into the batch coding software system, or generate a file to be coded through the batch coding software system, and store these contents in the system cache and display them in the form of multiple linked lists; Step 2, then the coding controller uses the group reading RFID reader / writer to conduct a full inspection and counting of the tags to be coded, realizing group reading of the tags. When in use, a batch of 100 to 500 can be placed in the group reading box (for rolled tags, the quantity should be about 100 - 200, and the roll diameters of the tags should be dispersed to weaken the influence between tags; for bulk tags, determine the placement quantity according to the size and volume of the tags suitable for the performance of the group reading box). Then the coding controller conducts group reading on the tags in the box to ensure that all the tags in the box are qualified tags that can be read. If there are tags containing unqualified tags, all these tags will be returned for sorting, and after sorting, they will be used as qualified tags; Step 3, then the coding controller randomly grabs the initial EPC codes in multiple linked lists that match the quantity of the tags after group reading and exchanges the initial EPC codes in the linked lists with the EPC codes of the group-read tags, realizing the batch coding operation of the tags. The reading rate of the group reading RFID reader / writer can generally read 1000 tags in 10S, so the time for coding all the tags once is generally within 30S. Repeatedly coding in a loop (2 to 4 times) can also complete all the coding within 1 - 2 minutes. The coding controller can be a control computer, and the control computer is a computer installed with a batch coding software system.

[0027] The coding controller is provided with a verification unit. After batch coding of tags is completed, the coding controller stores the EPC codes in each tag read by the group-reading RFID reader-writer into the linked list to be detected in the verification unit. The coding controller circularly matches the EPC codes in the linked list to be detected with the initially written EPC codes in the cache linked list, and the coding controller can display the tag information with unsuccessful matching through the display interface. That is, the EPC codes of the tags with coding completed are automatically stored in the linked list to be detected. In the verification status link, the detection function is started to circularly detect whether the EPC codes in the linked list exist in the original linked list (hereinafter simply referred to as data matching). After successful matching, the state machine is updated, and the tag data with unsuccessful matching is displayed in the software system interface list. During the circular matching process, when the number of tags that cannot be successfully matched is less than or equal to the set number, the coding controller performs countdown matching on these tags (when the number of tags that cannot be successfully matched is less than or equal to 5, the coding controller continues to perform 3 to 4 times of matching on these tags that cannot be successfully matched). Tags that still cannot be successfully matched at the end of the countdown are determined to be damaged and cannot achieve coding.

[0028] When the EPC codes of tags that cannot be coded are displayed on the display interface, first divide all the tags into two groups, and then the coding controller sequentially performs group reading on the two groups of tags through the group-reading RFID reader-writer. When it is group-read that the EPC codes of tags that cannot be coded are included in this group of tags, divide this group of tags into two, and then the coding controller sequentially performs group reading on the divided tags through the group-reading RFID reader-writer, gradually narrowing the search range to achieve the preliminary screening of damaged tags. After all the tags have been subjected to multiple binary searches, a small number of tags with good and bad mixed are read one by one by the RFID reader-writer to achieve precise search. That is, after multiple binary searches, the search range is narrowed, and then the bad tags are found by reading on the ordinary reader-writer.

[0029] The principle of binary search is to narrow the distance between the start position (front) and the end position (end), calculate the middle position mid = (front + end) / 2, and search between front and mid or between mid and end to determine and narrow the search range and finally determine the target. According to the qualified rate control of normal RFID tag production, in the first step, tags with qualified full inspection reading performance are selected. The maximum probability of unsuccessful coding is below 0.5%. The process of finding out bad tags through binary search hardly affects the overall work efficiency.

[0030] When the number of tags read by the coding controller through the group-reading RFID reader is greater than the set value, the coding controller will perform batch coding on the tags; during batch coding, the coding controller performs rapid quantitative coding on the tags. After the coding of the set number of tags is completed, the coding controller sets the remaining tags as unsuccessful in matching. Then, the coding controller verifies this batch of tags; after the verification of the previous batch of tags is completed, if the number of remaining tags is less than or equal to the set value, the coding controller performs batch coding on the remaining tags. Then, the coding controller verifies this batch of tags. If the number of remaining tags is greater than the set value, the coding controller performs rapid quantitative coding on the tags. After the coding of the set number of tags is completed, the coding controller sets the remaining tags as unsuccessful in matching. Then, the coding controller verifies this batch of tags until the coding of all tags is completed. During batch coding and verification, the coding controller can summarize the tag information that is unsuccessful in matching in each batch and display it through the display interface as the basis for subsequent screening.

[0031] When the number of tags read by the group is 500 and the set value is 300, the coding controller first performs rapid quantitative coding on the tags, that is, performs coding operations on 300 of all the tags, and the rest will be automatically set as unsuccessful in matching. After the coding of these 300 tags is successful, the coding controller verifies this batch of tags; after the coding verification of the 300 tags is completed, since the remaining 200 tags are less than the set value of 300, the coding controller performs batch coding on the remaining tags. Then, the coding controller verifies this batch of tags. The coding controller can summarize the tag information that is unsuccessful in matching in each batch and display it through the display interface.

[0032] When the number of tags read by the group is 500 and the set value is 200, the coding controller first performs rapid quantitative coding on the tags, that is, performs coding operations on 200 of all the tags, and the rest will be automatically set as unsuccessful in matching. After the coding of these 200 tags is successful, the coding controller verifies this batch of tags; after the coding verification of the 200 tags is completed, since the remaining 300 tags are greater than the set value of 200, the coding controller performs batch coding on these 300 un-coded tags again, that is, performs coding operations on 200 of the remaining 300 tags, and the remaining 100 tags will be automatically set as unsuccessful in matching. After the coding of these 200 tags is successful, the coding controller verifies this batch of tags; after the coding verification of this batch of tags is completed, since the remaining 100 tags are less than the set value of 200, the coding controller performs batch coding on the remaining tags. Then, the coding controller verifies these 100 tags. The coding controller can summarize the tag information that is unsuccessful in matching in each batch and display it through the display interface.

[0033] Embodiment 2: On the basis of Embodiment 1, referring to the appendix Figures 2 - 5. A system for batch coding using RFID group reading technology, including a coding controller 1 and a group reading RFID reader / writer 2, further including a metal box 3. The front end of the metal box 3 is provided with an opening 31, and a metal shielding cloth 4 that can be opened is provided at the opening 31. The metal shielding cloth 4 can block the entire opening 31. The group reading RFID reader / writer 2 is arranged inside the metal box 3, and the signal end of the group reading RFID reader / writer 2 is connected to the signal end of the coding controller 1 through a data bus. The group reading RFID reader / writer 2 is located on the inner top surface of the metal box 3. The metal shielding cloth 4 is woven from metal wires, so that the metal shielding cloth 4 has a certain flexibility, and the metal wires can be adsorbed by a magnet. A plurality of magnetic blocks 32 are provided at the opening 31 of the metal box 3, and the metal shielding cloth 4 blocks the entire opening 31 by the adsorption of the plurality of magnetic blocks 32. It further includes an RFID reader / writer 5. The signal output end of the RFID reader / writer 5 is connected to the signal input end of the coding controller 1 through a data line. A small number of mixed tags containing all defective tags left after multiple binary searches are read one by one on the RFID reader / writer 5 until all defective tags are found. When the RFID reader / writer 5 reads the information of a defective tag, the coding controller 1 will give a warning to facilitate the staff to quickly pick it out. For example, the display will flash or mark the defective tag information, as well as other existing warning means, which will not be elaborated here one by one.

[0034] It should be understood that: Although the above embodiments have made a relatively detailed written description of the design concept of the present invention, these written descriptions are only simple written descriptions of the design concept of the present invention, rather than limitations on the design concept of the present invention. Any combination, addition, or modification that does not exceed the design concept of the present invention falls within the protection scope of the present invention.

Claims

1. A method for batch coding using RFID group reading technology, characterized in that Including the following steps: Step 1: First, import the file containing the initial EPC code into the coding controller, and the coding controller stores the content in the imported file in the cache and displays it in the form of multiple linked lists; Step 2: Then, the coding controller performs full inspection and counting on the tags to be coded through the group-reading RFID reader / writer to achieve group reading of the tags; Step 3: Then, the coding controller randomly grabs the initial EPC codes in multiple linked lists that match the number of tags after group reading and exchanges the initial EPC codes in the linked lists with the EPC codes of the group-read tags to achieve batch coding operation of the tags; The coding controller is provided with a verification unit. After the batch coding of the tags is completed, the coding controller stores the EPC codes in each tag read by the group-reading RFID reader / writer on the to-be-detected linked list in the verification unit. The coding controller circularly matches the EPC codes in the to-be-detected linked list with the initially written EPC codes in the cache linked list, and the coding controller can display the tag information that fails to match through the display interface; During the circular matching process, when the number of tags that cannot be successfully matched is less than or equal to the set number, the coding controller performs countdown matching on these tags. If the tags still cannot be successfully matched at the end of the countdown, they are judged to be damaged tags and cannot be coded; When the EPC codes of the tags that cannot be coded are displayed on the display interface, first divide all the tags into two groups, and then the coding controller sequentially performs group reading on the two groups of tags through the group-reading RFID reader / writer. When the group reading shows that the EPC code of the tag that cannot be coded is included in this group of tags, divide this group of tags into two parts, and then the coding controller sequentially performs group reading on the divided tags through the group-reading RFID reader / writer to gradually narrow the search range and achieve preliminary screening of the damaged tags; After all the tags have been searched dichotomously for many times, use the RFID reader / writer to read the small number of tags with good and bad mixed one by one to achieve precise search.

2. The method for batch coding using RFID group reading technology according to claim 1, characterized in that: When the number of tags group-read by the coding controller through the group-reading RFID reader / writer is greater than the set value, the coding controller will perform batch coding on the tags; During batch coding, the coding controller performs fast quantitative coding on the tags. After the coding of the set number of tags is completed, the coding controller sets the remaining tags as unmatched, and then the coding controller verifies this batch of tags; After the verification of the previous batch of tags is completed, if the number of remaining tags is less than or equal to the set value, the coding controller performs batch coding on the remaining tags, and then the coding controller verifies this batch of tags. If the number of remaining tags is greater than the set value, the coding controller performs fast quantitative coding on the tags. After the coding of the set number of tags is completed, the coding controller sets the remaining tags as unmatched, and then the coding controller verifies this batch of tags until all the tags are coded.

3. A method for batch coding using RFID group reading technology according to claim 2, characterized in that: During batch coding and verification, the coding controller can summarize the tag information that fails to match in each batch and display it through the display interface as the basis for subsequent screening.

4. A system for batch coding using RFID group reading technology, comprising a coding controller and a group reading RFID reader / writer, characterized in that: It further includes a metal box, an opening is provided at the front end of the metal box, and a metal shielding cloth which can be opened is provided at the opening. The metal shielding cloth can cover the entire opening. The group-reading RFID reader-writer is arranged in the metal box, and the signal end of the group-reading RFID reader-writer is connected to the signal end of the coding controller through a data bus. It further includes a method for batch coding by using the RFID group-reading technology as described in claim 1.

5. A system for batch coding using RFID group reading technology according to claim 4, characterized in that: The metal shielding cloth is woven from metal wires.

6. A system for batch coding using RFID group reading technology according to claim 4 or 5, characterized in that: It further includes an RFID reader-writer, and the signal output end of the RFID reader-writer is connected to the signal input end of the coding controller through a data line.

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