A method for RFID tag identification using RFID devices

Abstract

The application provides an antenna device, an RFID device and an RFID tag identification method. The antenna device comprises a vertical rotating structure, a horizontal moving structure, a first stepping motor, a second stepping motor, a third stepping motor, a connecting structure and an RFID antenna. The first end of the horizontal moving structure is movably connected with the first end of the vertical rotating structure. The first end of the connecting structure is fixed on the horizontal moving structure. The RFID antenna is installed on the second end of the connecting structure. The second end of the vertical rotating structure is driven to rotate by the first stepping motor. The first end of the horizontal moving structure is driven to rotate by the second stepping motor. The horizontal moving structure is driven to move by the third stepping motor. The scheme solves the problem that the antennas of adjacent conveying belts are prone to mutual interference in the current RFID identification technology.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic identification, in particular to an antenna device, an RFID device and a method for RFID tag identification. BACKGROUND

[0002] A factory production line realizes process post identification binding through a set of high-frequency RFID identification equipment, and the complete equipment includes an RFID reader, an antenna and a tag.

[0003] The current use scheme is to install a set of RFID reader and antenna for each conveyor belt. When the antennas of adjacent conveyor belts are installed close to each other, the antenna signals will cause crosstalk and misreading. SUMMARY

[0004] The main purpose of the present application is to provide an antenna device, an RFID device and a method for RFID tag identification, so as to at least solve the problem that the antennas of adjacent conveyor belts are easily interfered with each other in the current RFID identification technology.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an antenna device is provided, comprising: a vertical rotating structure, a horizontal moving structure, a first stepping motor, a second stepping motor, a third stepping motor, a connecting structure and an RFID antenna, wherein the first end of the horizontal moving structure is movably connected with the first end of the vertical rotating structure, the first end of the connecting structure is fixed on the horizontal moving structure, the RFID antenna is installed on the second end of the connecting structure, the first stepping motor drives the second end of the vertical rotating structure to rotate, the second stepping motor drives the first end of the horizontal moving structure to rotate, and the third stepping motor drives the horizontal moving structure to move.

[0006] Optionally, the antenna device further comprises: a first gear and a second gear which are meshed with each other, the first gear is installed at the bottom of the horizontal moving structure, and the third stepping motor drives the second gear to rotate so as to drive the first gear to drive the horizontal moving structure to move.

[0007] Optionally, the connecting structure is a telescopic structure.

[0008] According to another aspect of the present application, an RFID device is provided, comprising: any one of the antenna devices described above, which is installed between two adjacent conveyor belts; an RFID tag which is placed in a process plate on the conveyor belt; a process plate in-place detection sensor which is used for in-place detection of the process plate; a light sensor which is used for detecting the placement position of the RFID tag; and an upper computer which respectively communicates with the antenna device and the process plate in-place detection sensor, and is configured to acquire tag information and process the tag information.

[0009] Optionally, the light sensor is multiple, and the multiple light sensors are respectively arranged at multiple positions where the RFID tag is to be arranged.

[0010] According to still another aspect of the present application, a method for identifying an RFID tag using the RFID device is provided, comprising: receiving a detection signal of a process board in-place detection sensor, and when the detection signal indicates that a process board passes, controlling a second stepper motor to drive a first end of a horizontal moving structure to rotate so as to make the RFID antenna face the conveying belt on which the process board exists; receiving a sensing signal of a light sensor, and controlling a first stepper motor to drive a second end of a vertical rotating structure to rotate and / or a third stepper motor to drive the horizontal moving structure to move so as to make the RFID antenna align with the RFID tag; obtaining a tag signal strength value of the RFID tag, and determining whether the tag information is complete and binding the RFID tag with a process post when the tag information is complete.

[0011] Optionally, the determining whether the tag information is complete comprises: obtaining a reference tag signal strength value; when the tag signal strength value of the RFID tag is greater than or equal to the reference tag signal strength value, determining that the tag information is complete; and when the tag signal strength value of the RFID tag is less than the reference tag signal strength value, indicating that the probability that the tag information is incomplete is greater than a preset probability.

[0012] Optionally, the connecting structure is a telescopic structure, and after detecting that the tag signal strength value of the RFID tag is less than the reference tag signal strength value, the method further comprises: a control comparison step of controlling the telescopic structure to extend by a preset step length, then obtaining the tag signal strength value again, and comparing the tag signal strength value with the reference tag signal strength value; and performing the control comparison step at least once until the tag signal strength value is greater than or equal to the reference tag signal strength value, or generating a prompt information when the execution times reach a times threshold value and the tag signal strength value is still not greater than or equal to the reference tag signal strength value, the prompt information indicating a binding failure.

[0013] Optionally, the binding the RFID tag with the process post when the tag information is complete comprises: determining whether the arrangement position of the RFID tag corresponds to the obtained commodity type code, and when the arrangement position corresponds to the commodity type code, continuing to compare whether the brand codes are consistent, and binding the RFID tag with the process post when the brand codes are consistent.

[0014] Optionally, the method further comprises: indicating a binding failure when the commodity type code does not match the reference commodity type and / or the brand code does not match the reference commodity brand, wherein the reference commodity type corresponds to the placement position of the RFID tag.

[0015] The technical scheme of the application provides an antenna device, which comprises a vertical rotating structure, a horizontal moving structure, a first stepping motor, a second stepping motor, a third stepping motor, a connecting structure and an RFID antenna, wherein the first end of the horizontal moving structure is movably connected with the first end of the vertical rotating structure, the first end of the connecting structure is fixed on the horizontal moving structure, the RFID antenna is installed on the second end of the connecting structure, the first stepping motor drives the second end of the vertical rotating structure to rotate, the second stepping motor drives the first end of the horizontal moving structure to rotate, and the third stepping motor drives the horizontal moving structure to move. The technical scheme solves the problem that the antennas of adjacent conveying belts are easily interfered with each other in the current RFID identification technology. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings constituting a part of the specification of the application are used to provide further understanding of the application, the illustrative embodiments of the application and the description thereof are used to explain the application, and do not constitute improper limitation on the application. In the drawings:

[0017] Figure 1 Fig. 1 shows a schematic diagram of an antenna device structure according to an embodiment of the application;

[0018] Figure 2 Fig. 2 shows a schematic diagram of an antenna device according to an embodiment of the application;

[0019] Figure 3 Fig. 3 shows a schematic diagram of a process plate tag placement area division according to an embodiment of the application;

[0020] Figure 4 Fig. 4 shows a control flow chart of an RFID tag identification method according to an embodiment of the application;

[0021] Figure 5 Fig. 5 shows a schematic diagram of an RFID tag identification device according to an embodiment of the application.

[0022] In the above drawings, the following reference signs are used:

[0023] 10, antenna device; 11, vertical rotating structure; 12, horizontal moving structure; 13, first stepping motor; 14, second stepping motor; 15, third stepping motor; 16, connecting structure; 17, RFID antenna; 18, first gear; 19, second gear; 20, rotating shaft. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] In order for those skilled in the technical field to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] As introduced in the background, in the prior art, a set of RFID reader and antenna is installed for each conveyor belt, when the antennas of adjacent conveyor belts are installed close to each other, the antenna signals will produce crosstalk to cause misreading. In order to solve the problem that the antennas of adjacent conveyor belts are easy to interfere with each other in the RFID identification technology, the embodiments of the present application provide an antenna device, an RFID device and an RFID tag identification method.

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application.

[0029] Figure 1 is a schematic diagram of an antenna device provided in the embodiments of the present application. As shown in Figure 1As shown, the antenna device 10 includes a vertical rotating structure 11, a horizontal moving structure 12, a first stepper motor 13, a second stepper motor 14, a third stepper motor 15, a connecting structure 16, and an RFID antenna 17. The first end of the horizontal moving structure 12 is movably connected to the first end of the vertical rotating structure 11. The first end of the connecting structure 16 is fixed on the horizontal moving structure 12. The RFID antenna 17 is installed on the second end of the connecting structure 16. The first stepper motor 13 drives the second end of the vertical rotating structure 11 to rotate. The second stepper motor 14 drives the first end of the horizontal moving structure 12 to rotate. The third stepper motor 15 drives the horizontal moving structure 12 to move.

[0030] Specifically, the antenna device aims to achieve precise movement and rotation of the RFID antenna in three-dimensional space, to improve the identification efficiency and accuracy of RFID tags. The antenna device schematic diagram is as follows: Figure 2 As shown, the specific components and functions of the antenna device 10 are as follows:

[0031] Vertical rotating structure 11: This part of the structure allows the RFID antenna to rotate in the vertical direction, ensuring that the antenna can face different conveyor belts or identification areas, thereby avoiding signal crosstalk and misreading.

[0032] Horizontal moving structure 12: This part of the structure allows the RFID antenna to move in the horizontal direction, ensuring that the antenna can align with tags at different positions on the process board, improving the flexibility and coverage of identification.

[0033] First stepper motor 13: drives the second end of the vertical rotating structure to rotate, realizing the angle adjustment of the antenna in the vertical direction. Stepper motors are very suitable for automatic control devices due to their precise control ability and the ability to realize small position movement.

[0034] Second stepper motor 14: drives the first end of the horizontal moving structure to rotate, realizing the angle adjustment of the antenna in the horizontal direction, further enhancing the alignment ability of the antenna and the accuracy of signal reception. Specifically, the first end of the horizontal moving structure is rotated to align with the left conveyor belt, or the second end of the horizontal moving structure is rotated to align with the right conveyor belt.

[0035] Third stepper motor 15: drives the horizontal moving structure to move, realizing the position adjustment of the antenna in the horizontal direction, ensuring that the antenna can align with tags on different process boards even if their positions differ in the horizontal direction.

[0036] Connecting structure 16: fixed on the horizontal moving structure, its second end is used to install the RFID antenna. The connecting structure provides a stable connection between the antenna and the moving and rotating structure, ensuring that the antenna can stably move and rotate.

[0037] RFID Antenna 17: Installed at the second end of the connecting structure, it is the core part of the entire device, used for transmitting and receiving radio frequency signals to read information on the RFID tag.

[0038] More specifically, a stepper motor is an electric motor that converts electrical pulse signals into linear or rotational motion. The core characteristics of a stepper motor include:

[0039] Step-by-step rotation: The rotation of a stepper motor is not continuous, but rather occurs in steps. With each received electrical pulse, the motor rotates a fixed angle, known as a step. This angle can range from a few degrees to several tens of degrees, depending on the design of the motor.

[0040] Precise position control: Since the rotation angle of a stepper motor is directly related to the number of input pulses, the rotation angle and position of the motor can be controlled by precisely controlling the number of pulses, achieving high-precision position positioning.

[0041] Open-loop control capability: Stepper motors typically use an open-loop control system, which directly controls the pulse signals to drive the motor without the need for feedback devices to achieve precise position control. This simplifies the control system and reduces costs.

[0042] Locking when stationary: When a stepper motor does not receive pulse signals, it will remain in its current position. This feature allows stepper motors to maintain stability in positioning applications without the need for additional brakes.

[0043] Torque-speed characteristics: Stepper motors can provide high torque at low speeds, but as the speed increases, the torque decreases. Therefore, they are most suitable for low-speed, high-torque, or precise control applications.

[0044] Step angle and resolution: The step angle of a stepper motor refers to the angle of rotation per step. The resolution of a motor refers to the smallest position increment that the motor can achieve. Higher resolution results in more precise position control.

[0045] Stepper motors are widely used in automation equipment. In this antenna device, stepper motors are used to accurately control the rotation and movement of the antenna in the vertical and horizontal directions, ensuring that the antenna can accurately align with the target tag and improve the accuracy and efficiency of identification.

[0046] For example, Figure 2As shown, the antenna device 10 further includes a rotating shaft 20, which is a key component connecting different structural parts and allowing relative rotational movement between the parts, thereby enabling precise positioning of the RFID antenna in three-dimensional space. The rotating shaft is located in the vertical rotating structure, enabling the entire structure to rotate vertically around its axis. The first stepper motor drives this rotating shaft, allowing control of the antenna's angle adjustment in the vertical direction, ensuring that the antenna can face different conveyor belts.

[0047] The entire antenna device controls the movement and rotation of the antenna in three-dimensional space through three stepper motors, achieving automatic and precise alignment and identification of RFID tags, improving identification efficiency and accuracy, while reducing the need for manual intervention. It is suitable for RFID identification tasks on automated production lines, optimizing production processes and improving production efficiency.

[0048] In the specific implementation process, the antenna device further includes a first gear and a second gear that mesh with each other. The first gear is installed at the bottom of the horizontal moving structure, and the third stepper motor drives the second gear to rotate to drive the first gear to move the horizontal moving structure.

[0049] Specifically, the antenna device has a gear transmission structure to achieve precise movement of the horizontal moving structure, as shown in Figure 2 As shown, it specifically includes:

[0050] The first gear 18 is installed at the bottom of the horizontal moving structure, and its function is to convert the rotational motion of the motor into linear motion of the horizontal moving structure. The first gear is closely integrated with the horizontal moving structure, ensuring that when the gear rotates, the horizontal moving structure can move accordingly.

[0051] The second gear 19 meshes with the first gear, and the two gears usually form a gear pair, transmitting motion through the meshing between the gears. The second gear is driven by the third stepper motor, which rotates synchronously when the third stepper motor rotates.

[0052] The third stepper motor drives the second gear, which in turn converts the rotational force into the rotation of the first gear through the meshing with the first gear. The rotation of the first gear drives the horizontal moving structure to move linearly in the horizontal direction with high precision. This transmission mechanism takes advantage of the high precision and efficiency of gear transmission, enabling small position adjustments of the antenna and improving the identification accuracy of RFID tags.

[0053] The stepping feature of the stepper motor (i.e., precise movement by a fixed angle each time) and the high precision gearing ensure that the antenna's movement in the horizontal direction can be precisely controlled, even if the distance is small, ensuring accurate positioning. By adding a gear transmission structure, the antenna device can move more stably and accurately in the horizontal direction, improving the identification efficiency and accuracy of the RFID antenna, further optimizing the automated process on the production line. This design also reduces wear and tear, extends the service life of the device, and reduces maintenance costs.

[0054] In the specific implementation process, the connection structure is a telescopic structure.

[0055] Specifically, the connection structure is designed as a telescopic structure, i.e., the connection structure can adjust its length within a certain range, and can be extended or shortened as needed, thereby adjusting the distance from the RFID antenna to the target tag. In identifying RFID tags, the distance between the antenna and the tag is a key parameter that affects signal strength and identification accuracy. The telescopic connection structure allows the antenna device to automatically adjust the distance during identification, ensuring that the antenna can read the tag within the optimal distance range, improving the identification rate and reducing misreading. Moreover, this design increases the flexibility of the device, allowing it to adapt to different sizes of process boards or tags, so that even if the position of the tag changes slightly, the antenna can be aligned through telescoping, avoiding identification failure due to inappropriate distance. By combining with the control of the stepper motor, the telescopic structure can be automatically telescoped by the motor drive without manual intervention, further improving the degree of automation and efficiency of the production line.

[0056] The application also provides an RFID device, which comprises:

[0057] Any of the above antenna devices is installed between two adjacent conveyors;

[0058] The RFID tag is placed in the process board on the conveyor; the process board in-place detection sensor is used for in-place detection of the process board;

[0059] The light sensor is used to detect the placement position of the RFID tag;

[0060] The host computer communicates with the antenna device and the process board in-place detection sensor, and is configured to obtain tag information and process the tag information.

[0061] Specifically, the RFID device is an integrated system designed to improve the identification accuracy and efficiency of RFID tags, reducing errors and improving production efficiency by optimizing antenna positioning and automated identification processes. Its key features and components are as follows:

[0062] Antenna device: The antenna device is installed between two adjacent conveyor belts, which can automatically adjust the angle and distance to align the RFID tags on the process board in the optimal way, avoiding signal interference and improving identification rate.

[0063] RFID tag: Placed inside the process board, used to store product information, through the RFID reader (part of the antenna device) for non-contact signal transmission and reception, to realize information reading and writing.

[0064] Process board in place detection sensor: used to detect whether the process board reaches the identification area of the RFID device in real time. When the sensor detects that the process board is in place, it will trigger the host computer to perform the next operation, such as adjusting the antenna position and reading the tag information.

[0065] Light sensor: installed in the tag placement area of the process board, used to detect the precise position of the RFID tag. When the tag blocks the light sensor, the sensor will send a signal to the host computer indicating the placement position of the tag, so that the antenna device can accurately align the tag.

[0066] Host computer: as the control center of the whole system, it communicates with the antenna device and the process board in place detection sensor, receives the signals sent by the sensor, and controls the action of the antenna device according to the signal information, reads the RFID tag information, and processes these information, such as verification, record or further data analysis.

[0067] The whole RFID device forms a closed-loop identification system through the automatic adjustment of the antenna device, the real-time detection of the sensor and the intelligent control of the host computer. It not only can automatically identify and read RFID tags, but also can adjust the position and direction of the antenna according to the signal strength and position information of the tag, avoiding the common signal interference and identification omission problems in traditional RFID systems, improving the automation level and work efficiency of the production line, and reducing the maintenance cost and the demand for manual intervention of the equipment.

[0068] In the specific implementation process, there are multiple light sensors, and multiple light sensors are placed at multiple positions where RFID tags are placed.

[0069] Specifically, when the process board carries the product through the RFID device, the light sensor can monitor these preset positions in real time. If the light of a certain position is blocked by the RFID tag, the sensor will immediately detect it and send the position information to the upper computer. Through the cooperation of multiple light sensors, the system can quickly determine the exact position of the tag, so that the antenna device can adjust the direction and distance more accurately, improving the identification efficiency and accuracy of the RFID tag. If a certain preset position should have a tag but the light sensor does not detect blocking, it may mean that the tag is not placed or placed incorrectly, and the upper computer can record this abnormal situation and notify the staff through an alarm or other means for processing. By configuring multiple light sensors at multiple positions where RFID tags are pre-placed, the RFID device can accurately detect the position of the RFID tag as the process board passes, ensuring that the antenna device accurately aligns with the tag, thereby improving the efficiency and accuracy of RFID identification, reducing identification errors caused by improper tag position on the production line, and further improving the automation level and efficiency of the production line.

[0070] The embodiment of the present application also provides a method for identifying RFID tags by using the above RFID device, comprising: receiving a detection signal of a process board arrival detection sensor, and when the detection signal indicates that a process board has passed, controlling a first end of a horizontal moving structure to rotate by a second stepping motor according to the position of a conveying belt where the process board is located, so that the RFID antenna faces the conveying belt on the side where the process board exists; receiving a sensing signal of a light sensor, and controlling the second end of a vertical rotating structure to rotate by a first stepping motor and / or the horizontal moving structure to move by a third stepping motor according to the sensing signal, so that the RFID antenna is aligned with the RFID tag; obtaining a tag signal strength value of the RFID tag, and determining whether the tag information is complete, and binding the RFID tag with a process post when the tag information is complete.

[0071] Specifically, first, the host computer in the RFID device receives detection signals from the process board in-place detection sensors, which indicate whether a process board is passing through the RFID device identification area. When the detection signals confirm the presence of a process board, the host computer controls the first end of the horizontal moving structure of the antenna device to rotate according to the position of the process board on the conveyor belt (left or right), ensuring that the RFID antenna is oriented towards the side of the conveyor belt where the process board is located, in preparation for RFID tag identification. The host computer simultaneously receives sensing signals from light sensors distributed in the pre-set RFID tag placement area on the process board, which are used to detect whether the tag is placed in place and the specific position. According to the signals emitted by the light sensors, the host computer controls the second end of the vertical rotating structure to rotate and the third step motor to drive the horizontal moving structure to move, accurately adjusting the relative position of the RFID antenna and the RFID tag, so that the antenna can be accurately aligned with the tag, ensuring the best signal reception. The host computer reads the signal strength value of the RFID tag, which reflects the quality of communication between the RFID antenna and the tag. Then, the host computer determines whether the RFID tag information is complete based on the signal strength value. If the tag information is complete (i.e., the signal strength is sufficient and the tag data is readable), the RFID tag is bound to the process post where the process board is located, completing the reading of the tag information and the recording of the product process flow; if the tag information is not complete, the system may take remedial measures, such as adjusting the antenna position for another attempt, or marking the tag as abnormal and notifying manual inspection.

[0072] This method automatically identifies and binds RFID tags by intelligent control of the host computer over the step motor driving the antenna device and the use of light sensors for assisted positioning. This method improves the automation level of RFID tag identification, reduces identification errors caused by signal interference or inaccurate tag positioning, and reduces the need for manual intervention, significantly improving the efficiency and accuracy of the production line.

[0073] In the specific implementation process, determining whether the tag information is complete includes: obtaining a reference tag signal strength value; in the case where the tag signal strength value of the RFID tag is greater than or equal to the reference tag signal strength value, determining that the tag information is complete; and in the case where the tag signal strength value of the RFID tag is less than the reference tag signal strength value, indicating that the probability of the tag information being incomplete is greater than a preset probability.

[0074] Specifically, first, the system needs to obtain a reference tag signal strength value, select several tags and place them in the tag placement position of the process board, read out the signal strength values R1, R2, …, Rn of the n tags in turn, and calculate the average value, i.e. the reference tag signal strength value R = (R1+R2+…+Rn) / n. Obtaining the reference signal strength value is the basis for evaluating the integrity of the current RFID tag information. The system compares the signal strength value of the current RFID tag read with the reference signal strength value. If the signal strength value of the current tag is greater than or equal to the reference value, it indicates that the communication quality between the RFID antenna and the tag is good, and the data transmission is not significantly disturbed. In the case where the signal strength meets the reference condition (i.e. greater than or equal to the reference value), the system determines that the RFID tag information is complete and can be further processed and bound to the process, which means that the tag data can be accurately read and parsed without data loss or damage; on the contrary, if the signal strength value of the current RFID tag is less than the reference signal strength value, the system evaluates the probability of incomplete tag information. This evaluation is based on the statistical relationship between signal strength and data integrity. The preset probability may be a threshold value set through experience or testing to determine when the signal strength is reduced to what extent, the probability of incomplete information will exceed the acceptable range, i.e. the signal strength is not necessarily incomplete under the condition of low signal strength, but the probability of incompleteness is relatively high. If the evaluation result shows that the probability of incomplete information is greater than the preset probability threshold, the system will indicate that the RFID tag information is incomplete and take appropriate measures, such as marking the tag as abnormal, re-trying to read or notifying manual inspection. This step helps to identify and handle potential RFID tag reading errors in a timely manner, avoiding process binding errors caused by incomplete data, thereby ensuring the accuracy of production data and smooth operation of the production line.

[0075] Through the above steps, the RFID device can evaluate the integrity of the RFID tag information based on the signal strength, ensuring that only the tag information with signal strength meeting certain standards can be bound to the process post, improving the reliability and efficiency of the RFID system, and reducing the production error rate caused by incomplete or damaged data.

[0076] In the specific implementation process, the connecting structure is a telescopic structure. After detecting that the tag signal strength value of the RFID tag is less than the reference tag signal strength value, the method further includes:

[0077] Control comparison step: control the telescopic structure to extend by a preset step length, then acquire the tag signal strength value again, and compare the size of the tag signal strength value and the reference tag signal strength value;

[0078] The control comparison step is performed at least once until the tag signal strength value is greater than or equal to the reference tag signal strength value, or a prompt information is generated when the control comparison step is performed a number of times up to a threshold number of times and the tag signal strength value is still not greater than or equal to the reference tag signal strength value, the prompt information indicating a binding failure.

[0079] Specifically, the connection structure connecting the RFID antenna is designed as a telescopic structure, which means it can automatically extend or shorten within a certain range to adjust the distance between the antenna and the RFID tag. This design is used to optimize the signal receiving conditions, especially when the signal strength is insufficient. When the signal strength value of the RFID tag is detected to be less than the reference value, the device does not directly mark the tag information as incomplete or binding failure, but first tries to improve the signal receiving conditions by controlling the telescopic structure to extend by a preset step length. Then, the device obtains the tag signal strength value again and compares it with the previous reference value. The device will perform the above control comparison step at least once until the tag signal strength value reaches or exceeds the reference value, which indicates that the signal receiving conditions have been optimized and can ensure the complete reading of the tag information. In this process, the distance between the antenna and the tag is gradually adjusted to the ideal communication range. If the tag signal strength value is still lower than the reference value after the telescopic structure is extended, and the number of executions reaches the set number of times threshold and still does not improve, the device will generate a prompt information indicating that this binding fails, which usually means that the RFID tag may be damaged, has poor performance or has other problems that cannot be solved by distance adjustment. By introducing the telescopic action of the telescopic structure, the device tries to optimize the receiving conditions when the signal strength is insufficient, thereby improving the reading success rate of the RFID tag. If the attempt fails, the device can generate a prompt information indicating a binding failure in time, avoiding invalid work, and also providing a basis for subsequent troubleshooting.

[0080] The advantage of this method is to improve the flexibility and success rate of RFID tag reading, reduce the reading failure caused by signal strength problems, and prevent infinite loop adjustment by setting the number of attempts threshold, ensuring the efficiency and stability of the device operation. On the automated production line, this mechanism can effectively reduce the need for manual intervention, improve production efficiency and data accuracy.

[0081] In the specific implementation process, the RFID tag is bound to the process post when the tag information is complete, including: determining whether the placement position of the RFID tag corresponds to the obtained product type code, and in the case of correspondence, continuing to compare whether the brand codes are consistent, and binding the RFID tag to the process post when the brand codes are consistent.

[0082] Specifically, first, the system needs to verify whether the placement position of the RFID tag matches the read product type code. The product type code has a one-to-one correspondence with the nine-square grid position on the process board, and each grid represents a possible product type or tag placement specification. The process board tag placement area division diagram is shown in Figure 3 For example, the A1 grid represents the first column of the first row, which is a specific position on the process board, used to place the product type code, which corresponds one-to-one with the serial number of the nine-square grid division. Inside each nine-square grid, there is a light sensor that detects whether the tag blocks the light, thereby determining whether the grid has placed an RFID tag. When a tag is placed in a certain grid, it will block the light, indicating that the grid has a tag. When the process board passes through the RFID device, the host computer can intelligently determine the specific position of the tag (i.e., which row and column grid it is in) based on the signal sent by the light sensor, and further control the extension and rotation of the RFID antenna to ensure accurate alignment of the antenna and the tag. The system can determine the exact position of the tag (i.e., the nine-square grid it is in) through the tag blocking information detected by the light sensor, and compare it with the read product type code to confirm whether they match. If the placement position corresponds to the product type code, the system will further verify whether the brand code on the tag matches the expected one. The brand code is part of the RFID tag information and is used to identify the brand of the product. This step ensures that the bound RFID tag is not only associated with the correct product type, but also belongs to the expected brand, thereby avoiding production line process binding errors, such as binding a product of one brand with process information of another brand. After confirming that the product type code and brand code are correct, the system binds the RFID tag with the process post where the current process board is located. The binding action means that the product and brand information in the RFID tag are linked to the specific processing step on the production line and recorded in the host computer or database for subsequent process tracking, quality control, and production management.

[0083] This multi-level verification binding process improves the application accuracy of the RFID system on the automated production line, ensuring that each RFID tag is accurately associated with the corresponding process post, avoiding production chaos and product quality problems that may be caused by incorrect binding. At the same time, through intelligent control of the light sensor and the host computer, the entire binding process can be completed automatically without human intervention, significantly improving production efficiency and automation level.

[0084] In the specific implementation process, the above method further includes: indicating a binding failure when the product type code does not match the reference product type and / or the brand code does not match the reference product brand, wherein the reference product type corresponds to the placement position of the RFID tag.

[0085] Specifically, the system has preset corresponding information of reference commodity types and reference commodity brands, which are usually set based on the process requirements and product standards of the production line, to guide and verify the correctness of RFID tag binding. The reference commodity type is directly related to the placement position of the RFID tag on the process board, that is, each position (a certain cell in the nine-square grid) corresponds to a specific commodity type. When the RFID antenna successfully reads the tag information and determines that the information is complete, the system will further analyze the commodity type code and brand code on the tag and compare them with the preset reference information. The commodity type code is used to confirm the type of the commodity represented by the tag, and the brand code is used to identify the brand attribution of the commodity. If it is found in the comparison process that the commodity type code of the RFID tag is inconsistent with the reference commodity type, or the brand code is inconsistent with the reference commodity brand (that is, the tag information does not match the preset product standards), the system will automatically indicate that this binding fails, which means that the commodity information identified by the RFID tag does not match the commodity information required by the current process board or process, which may involve an incorrect product type or brand. Once the system indicates that the binding fails, it will record the abnormal situation of this binding, which may include the ID of the RFID tag, the commodity type code, the brand code, and the corresponding nine-square grid position, etc. At the same time, the system will trigger an alarm or prompt to notify the operators on the production line so that they can intervene in time to investigate and correct the error. The existence of this mechanism ensures the accuracy of RFID tag binding and the traceability of products, avoids binding errors caused by incorrect tag information, and improves production quality and efficiency. In the automated production line, this precise type code and brand code comparison, as well as timely error indication, is crucial for preventing production errors and improving the intelligent level of the production line.

[0086] In order for those skilled in the art to more clearly understand the technical solutions of the present application, the implementation process of the RFID tag identification method of the present application will be described in detail below in conjunction with specific embodiments.

[0087] The present embodiment relates to a specific RFID tag identification method, as shown in Figure 4 The control flowchart of the RFID tag identification method includes the following steps:

[0088] The antenna device is installed between the two adjacent conveying belts, the RFID antenna is installed at the front end of the antenna device, and the antenna device is rotated to the conveying belt on either side for measuring the tag signal strength value;

[0089] The process board is placed on the conveying belt, and the RFID tag in the process board is directly opposite the front of the RFID antenna;

[0090] Select several labels and put them into the label placing position of the process board, read the signal strength values R1, R2, …, Rn of the n labels in turn, and calculate the average value, i.e. the reference label signal strength value R=(R1+R2+…+Rn) / n;

[0091] Start the transmission belt;

[0092] Monitor whether there are process boards flowing through the left and right sides of the RFID antenna;

[0093] If there are no process boards flowing through the left and right sides of the RFID antenna, the horizontal moving structure of the antenna device remains stationary;

[0094] If there are process boards flowing through the right side of the RFID antenna, the horizontal moving structure of the antenna device rotates to the right, and if there are process boards flowing through the left side of the RFID antenna, the horizontal moving structure of the antenna device rotates to the left;

[0095] Start the light sensor detection, and the light sensor sends a sensing signal to the upper computer, which controls the vertical rotating structure and the horizontal moving structure of the antenna device to move to the target grid;

[0096] Read the label information and whether the current label signal strength value can be obtained;

[0097] If the current label signal strength value cannot be obtained, the label is abnormal and cannot be bound, and the process ends;

[0098] If the current label signal strength value can be obtained, it is determined whether the current label signal strength value is greater than or equal to R;

[0099] If the current label signal strength value is greater than or equal to R, the label information, including the product type code and the brand code, is obtained;

[0100] It is determined whether the product type code and the brand code are consistent with the preset;

[0101] If the product type code and the brand code are consistent with the preset, the label is bound, and the process ends;

[0102] If the product type code and the brand code are inconsistent with the preset, jump to “label abnormal, cannot be bound, process ends”;

[0103] If the current label signal strength value is less than R, the telescopic structure of the antenna device is controlled to extend 1 cm forward, and the label signal value is reacquired;

[0104] It is determined whether the current label signal strength value is greater than or equal to R;

[0105] If the current label signal strength value is greater than or equal to R, jump to “obtain label information, including product type code and brand code”;

[0106] If the current tag signal strength value is less than R, it is determined whether the cumulative distance of the telescopic structure movement exceeds 3 cm;

[0107] If the cumulative distance of the telescopic structure movement does not exceed 3 cm, jump to "control the telescopic structure to extend 1 cm forward, and reacquire the tag signal value";

[0108] If the cumulative distance of the antenna device movement exceeds 3 cm, jump to "the tag is abnormal, cannot be bound, and the flow ends".

[0109] The embodiment of the present application also provides a device for RFID tag identification. It should be noted that the device for RFID tag identification of the embodiment of the present application can be used to execute the method for RFID tag identification provided by the embodiment of the present application. The device is used to realize the above-mentioned embodiment and preferred embodiment, and the description has been made. As used below, the term "module" can be a combination of software and / or hardware that realizes a predetermined function. Although the device described in the following embodiment is preferably realized in software, the realization of hardware, or a combination of software and hardware, is also possible and conceived.

[0110] The device for RFID tag identification provided by the embodiment of the present application is introduced below.

[0111] The embodiment of the present application provides a device for RFID tag identification, as shown in Figure 5 The device comprises:

[0112] The first receiving control unit 51 receives the detection signal of the process plate in-place detection sensor. When the detection signal indicates that a process plate passes, the first end of the horizontal movement structure is controlled to rotate by the second step motor according to the position of the conveying belt where the process plate is located, so that the RFID antenna faces the conveying belt where the process plate exists.

[0113] The second receiving control unit 52 receives the sensing signal of the light sensor, and controls the rotation of the second end of the vertical rotation structure by the first step motor and / or the movement of the horizontal movement structure by the third step motor to make the RFID antenna and the RFID tag align according to the sensing signal.

[0114] The acquisition and determination unit 53 acquires the tag signal strength value of the RFID tag, and determines whether the tag information is complete and binds the RFID tag and the process post in the case where the tag information is complete.

[0115] Specifically, the host computer in the RFID device receives detection signals from the process board in-place detection sensors, which indicate whether a process board is passing through the RFID device identification area. When the detection signals confirm the presence of a process board, the host computer controls the first end of the horizontal moving structure of the antenna device to rotate by controlling the second stepper motor, ensuring that the RFID antenna is oriented towards the side of the conveyor where the process board is located, in preparation for RFID tag identification. The host computer simultaneously receives sensing signals from light sensors distributed in the pre-set RFID tag placement area on the process board, which are used to detect whether the tag is placed in place and the specific location. According to the signals emitted by the light sensors, the host computer controls the second end of the vertical rotating structure to rotate by controlling the first stepper motor, and controls the horizontal moving structure to move by controlling the third stepper motor, accurately adjusting the relative position of the RFID antenna and the RFID tag, so that the antenna can be accurately aligned with the tag, ensuring the best signal reception. The host computer reads the signal strength value of the RFID tag, which reflects the quality of communication between the RFID antenna and the tag. Then, the host computer determines whether the RFID tag information is complete according to the signal strength value. If the tag information is complete (i.e., the signal strength is sufficient and the tag data is readable), the RFID tag is bound to the process post where the process board is located, completing the reading of the tag information and the recording of the product process flow. If the tag information is not complete, the system may take remedial measures, such as adjusting the antenna position for another attempt, or marking the tag as abnormal and notifying manual inspection.

[0116] The acquisition determination unit includes:

[0117] An acquisition module is configured to acquire a reference tag signal strength value.

[0118] A first determination module is configured to determine that the tag information is complete when the tag signal strength value of the RFID tag is greater than or equal to the reference tag signal strength value.

[0119] An indication module is configured to indicate that the probability of the tag information being incomplete is greater than a preset probability when the tag signal strength value of the RFID tag is less than the reference tag signal strength value.

[0120] Specifically, the system needs to obtain a reference tag signal strength value, select several tags to place in the tag placement position of the process board, sequentially read out the signal strength values R1, R2, …, Rn of the n tags, and calculate the average value, i.e. the reference tag signal strength value R = (R1+R2+…+Rn) / n. Obtaining the reference signal strength value is the basis for evaluating the completeness of the current RFID tag information. The system compares the signal strength value of the current RFID tag read with the reference signal strength value. If the signal strength value of the current tag is greater than or equal to the reference value, it indicates that the communication quality between the RFID antenna and the tag is good, and the data transmission is not significantly disturbed. In the case where the signal strength meets the reference condition (i.e. greater than or equal to the reference value), the system determines that the RFID tag information is complete, and further data processing and process binding can be performed, which means that the tag data can be accurately read and parsed without data loss or damage. On the contrary, if the signal strength value of the current RFID tag is less than the reference signal strength value, the system evaluates the probability of incomplete tag information. This evaluation is based on the statistical relationship between signal strength and data integrity. The preset probability may be a threshold value set through experience or testing, which is used to determine when the signal strength is reduced to what extent, the probability of incomplete information will exceed the acceptable range. That is, a low signal strength does not necessarily mean that the information is incomplete, but the probability of incompleteness is relatively high. If the evaluated probability of incomplete information is greater than the preset probability threshold, the system will indicate that the RFID tag information is incomplete and take appropriate processing measures, such as marking the tag as abnormal, reattempting to read or notifying manual inspection. This step helps to identify and handle potential RFID tag reading errors in a timely manner, avoids process binding errors caused by incomplete data, and ensures the accuracy of production data and smooth operation of the production line.

[0121] The above connection structure is a retractable structure. After detecting that the above tag signal strength value of the above RFID tag is less than the above reference tag signal strength value, the above acquisition determination unit further comprises:

[0122] A control comparison module is configured to control the retractable structure to extend by a preset step length, then acquire the tag signal strength value again, and compare the tag signal strength value with the reference tag signal strength value.

[0123] Specifically, the connection structure connecting the RFID antenna is designed as a telescopic structure, which means it can automatically extend or shorten within a certain range to adjust the distance between the antenna and the RFID tag. This design is used to optimize signal reception conditions, especially when the signal strength is insufficient. When the signal strength value of the RFID tag is detected to be less than the reference value, the device does not directly mark the tag information as incomplete or binding failure, but first attempts to improve the signal reception conditions by controlling the telescopic structure to extend by a preset step length. Subsequently, the device again acquires the tag signal strength value and compares it with the previous reference value. The device will perform the above control comparison steps at least once until the tag signal strength value reaches or exceeds the reference value, indicating that the signal reception conditions have been optimized to ensure complete reading of the tag information. In this process, the distance between the antenna and the tag is gradually adjusted to the ideal communication range. If during the execution of the control comparison steps, despite the extension of the telescopic structure, the tag signal strength value is still below the reference value, and the execution times reach the set number of times threshold without improvement, the device will generate a prompt information indicating that this binding fails, which usually means that the RFID tag may be damaged, poorly performing or have other problems that cannot be solved by distance adjustment. By introducing the telescopic action of the telescopic structure, the device attempts to optimize the reception conditions when the signal strength is insufficient, thereby improving the reading success rate of the RFID tag. If the attempt fails, the device can generate prompt information indicating that the binding fails in time, avoiding invalid work, and also providing a basis for subsequent troubleshooting.

[0124] The acquisition determination unit further includes:

[0125] The second determination module determines whether the placement position of the RFID tag corresponds to the acquired product type code. If they correspond, it continues to compare whether the brand codes are consistent. If the brand codes are consistent, the RFID tag is bound to the process post.

[0126] Specifically, the system needs to verify whether the placement position of the RFID tag matches the read product type code. The product type code has a one-to-one correspondence with the nine-square positions on the process board. Each square represents a possible product type or tag placement specification. The process board tag placement area division diagram is as follows: Figure 3As shown, for example, the A1 grid represents the first column of the first row, which is a specific position on the process board for placing the commodity type code, and the commodity type code and the grid number of the nine-square grid are one-to-one corresponding. Inside each nine-square grid, there is a light sensor for detecting whether the label blocks the light, so as to determine whether the grid has placed the RFID label. When a label is placed in a certain grid, it will block the light, which represents that the label is placed in the grid, and at this time the sensor sends a trigger signal to the host computer to inform that the corresponding grid number has a label. When the process board passes through the RFID device, the host computer can intelligently determine the specific position of the label (i.e., which row and which column of the grid) according to the signal sent by the light sensor, and further control the extension and rotation of the RFID antenna to ensure the accurate alignment of the antenna and the label. The system can determine the accurate position of the label (i.e., the nine-square grid where it is located) through the label blocking information detected by the light sensor, and compare it with the commodity type code read to confirm whether they match. If the placement position corresponds to the commodity type code, the system will further verify whether the brand code on the label is consistent with the expected one, and the brand code is part of the RFID label information, which is used to identify the brand of the commodity. This step ensures that the bound RFID label is not only associated with the correct commodity type, but also belongs to the expected brand, thereby avoiding the binding error of the process on the production line, such as binding a product of one brand with the process information of another brand. After confirming that the commodity type code and the brand code are correct, the system binds the RFID label with the process post where the current process board is located, and the binding action means that the commodity and brand information in the RFID label are linked with the specific processing step on the production line, which is recorded in the host computer or database for subsequent process tracking, quality control and production management.

[0127] The second determination module comprises:

[0128] The indication submodule is configured to indicate a binding failure when the commodity type code does not match the reference commodity type and / or the brand code does not match the reference commodity brand, wherein the reference commodity type corresponds to the placement position of the RFID label.

[0129] Specifically, the system has preset corresponding information of reference commodity types and reference commodity brands, which are usually set based on the process requirements and product standards of the production line, to guide and verify the correctness of RFID tag binding. The reference commodity type is directly related to the placement position of the RFID tag on the process board, that is, each position (a certain cell in the nine-square grid) corresponds to a specific commodity type. When the RFID antenna successfully reads the tag information and determines that the information is complete, the system will further analyze the commodity type code and brand code on the tag and compare them with the preset reference information. The commodity type code is used to confirm the commodity category represented by the tag, and the brand code is used to identify the brand attribution of the commodity. If it is found in the comparison process that the commodity type code of the RFID tag is inconsistent with the reference commodity type, or the brand code is inconsistent with the reference commodity brand (that is, the tag information does not match the preset product standard), the system will automatically indicate that this binding fails, which means that the commodity information identified by the RFID tag does not match the commodity information required by the current process board or process, which may involve an incorrect product type or brand. Once the system indicates that the binding fails, it will record the abnormal situation of this binding, which may include the ID of the RFID tag, the commodity type code, the brand code, and the corresponding nine-square grid position, etc. At the same time, the system will trigger an alarm or prompt to notify the operators on the production line so that they can intervene in time to investigate and correct the error. The existence of this mechanism ensures the accuracy of RFID tag binding and the traceability of products, avoids process binding errors caused by incorrect tag information, and improves production quality and efficiency. In the automated production line, this precise type code and brand code comparison, as well as timely error indication, is crucial for preventing production errors and improving the intelligent level of the production line.

[0130] The above-mentioned RFID tag identification device includes a processor and a memory, and the first receiving control unit, the second receiving control unit, the acquisition determination unit, etc. are stored in the memory as program units. The corresponding functions are realized by the processor executing the above-mentioned program units stored in the memory. The above-mentioned modules are located in the same processor; or the above-mentioned modules are located in different processors in any combination.

[0131] The memory can include a non-permanent memory in a computer readable medium, a random access memory (RAM) and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory includes at least one memory chip.

[0132] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0133] The technical scheme of the application is applied to an antenna device, which comprises a vertical rotating structure, a horizontal moving structure, a first stepping motor, a second stepping motor, a third stepping motor, a connecting structure and an RFID antenna, wherein the first end of the horizontal moving structure is movably connected with the first end of the vertical rotating structure, the first end of the connecting structure is fixed on the horizontal moving structure, the RFID antenna is installed on the second end of the connecting structure, the second end of the vertical rotating structure is driven to rotate by the first stepping motor, the first end of the horizontal moving structure is driven to rotate by the second stepping motor, and the horizontal moving structure is driven to move by the third stepping motor.In this scheme, firstly, a detection signal of a process board in-place detection sensor is received, when the detection signal indicates that a process board passes, the first end of the horizontal moving structure is controlled to rotate by the second stepping motor according to the position of the conveying belt where the process board is located, so that the RFID antenna faces the conveying belt on the side where the process board exists, then, a sensing signal of a light sensor is received, the second end of the vertical rotating structure is controlled to rotate by the first stepping motor and / or the horizontal moving structure is controlled to move by the third stepping motor according to the sensing signal, so that the RFID antenna is aligned with the RFID tag, finally, a tag signal strength value of the RFID tag is acquired, and it is determined whether the tag information is complete, and the RFID tag is bound with a process post in the case that the tag information is complete, thereby solving the problem that the antennas of adjacent conveying belts are easily interfered with each other in the current RFID identification technology.

[0134] The embodiment of the application provides a computer readable storage medium, which comprises a stored program, wherein the program controls a device where the computer readable storage medium is located to execute the RFID tag identification method when the program runs.

[0135] Specifically, the RFID tag identification method comprises the following steps: receiving a detection signal of a process board in-place detection sensor, when the detection signal indicates that a process board passes, the first end of the horizontal moving structure is controlled to rotate by the second stepping motor according to the position of the conveying belt where the process board is located, so that the RFID antenna faces the conveying belt on the side where the process board exists; receiving a sensing signal of a light sensor, the second end of the vertical rotating structure is controlled to rotate by the first stepping motor and / or the horizontal moving structure is controlled to move by the third stepping motor according to the sensing signal, so that the RFID antenna is aligned with the RFID tag; acquiring a tag signal strength value of the RFID tag, and determining whether the tag information is complete, and binding the RFID tag with a process post in the case that the tag information is complete.

[0136] The embodiment of the present application provides a device, which comprises a processor, a memory, and a program stored on the memory and executable on the processor, and when the processor executes the program, at least the following steps are implemented: receiving a detection signal of a process plate in place detection sensor, when the detection signal indicates that a process plate passes, controlling a first end of a horizontal moving structure to rotate by a second stepping motor according to a position of a conveying belt where the process plate is located, so that an RFID antenna faces the conveying belt on a side where the process plate exists; receiving a sensing signal of a light sensor, controlling a second end of a vertical rotating structure to rotate by a first stepping motor and / or controlling the horizontal moving structure to move by a third stepping motor according to the sensing signal, so that the RFID antenna is aligned with an RFID tag; acquiring a tag signal strength value of the RFID tag, and determining whether tag information is complete, and binding the RFID tag with a process post in the case that the tag information is complete.

[0137] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for identifying RFID tags using RFID equipment, characterized in that, The RFID device includes an antenna device installed between two adjacent conveyor belts; an RFID tag placed inside a process plate on the conveyor belt; a process plate positioning detection sensor for detecting the positioning of the process plate; and a light sensor for detecting the placement position of the RFID tag. A host computer communicates with the antenna device and the process board positioning sensor, and is configured to acquire tag information and process the tag information. The antenna device includes a vertical rotation structure, a horizontal movement structure, a first stepper motor, a second stepper motor, a third stepper motor, a connecting structure, and an RFID antenna. The first end of the horizontal movement structure is movably connected to the first end of the vertical rotation structure. The first end of the connecting structure is fixed to the horizontal movement structure. The RFID antenna is mounted on the second end of the connecting structure. The first stepper motor drives the second end of the vertical rotation structure to rotate, the second stepper motor drives the first end of the horizontal movement structure to rotate, and the third stepper motor drives the horizontal movement structure to move. The method includes: The system receives the detection signal from the process board arrival detection sensor. When the detection signal indicates that a process board has passed, the system controls the first end of the second stepper motor to rotate according to the position of the conveyor belt where the process board is located, so that the RFID antenna faces the conveyor belt on the side where the process board is located. The system receives a sensing signal from a light sensor and controls a first stepper motor to drive the second end of the vertical rotating structure to rotate and / or a third stepper motor to drive the horizontal moving structure to move, thereby aligning the RFID antenna with the RFID tag. Obtain the RFID tag signal strength value, determine whether the tag information is complete, and bind the RFID tag to the work station if the tag information is complete.

2. The method according to claim 1, characterized in that, The antenna device further includes: A first gear and a second gear mesh with each other. The first gear is installed at the bottom of the horizontal moving structure. The third stepper motor drives the second gear to rotate, thereby driving the first gear to move the horizontal moving structure.

3. The method according to claim 1 or 2, characterized in that, The connection structure is a retractable structure.

4. The method according to claim 1, characterized in that, There are multiple light sensors, which are respectively placed at multiple locations where RFID tags are pre-placed.

5. The method according to claim 1, characterized in that, Determining whether the label information is complete includes: Obtain the reference tag signal strength value; If the RFID tag's signal strength value is greater than or equal to the reference tag's signal strength value, the tag information is determined to be complete. If the signal strength value of the RFID tag is less than the reference tag signal strength value, the probability that the tag information is incomplete is greater than a preset probability.

6. The method according to claim 5, characterized in that, The connection structure is a scalable structure. After detecting that the signal strength value of the RFID tag is less than the reference tag signal strength value, the method further includes: Control comparison steps: After controlling the stretchable structure to extend by a preset step length, the tag signal strength value is acquired again, and the tag signal strength value is compared with the reference tag signal strength value; The control comparison step is executed at least once until the tag signal strength value is greater than or equal to the reference tag signal strength value. Alternatively, if the number of executions reaches a threshold and the tag signal strength value is still not greater than or equal to the reference tag signal strength value, a prompt message is generated indicating that the binding has failed.

7. The method according to claim 1, characterized in that, If the tag information is complete, the RFID tag is bound to the work process position, including: Determine whether the placement location of the RFID tag corresponds to the obtained product type code. If they correspond, continue to compare whether the brand code is consistent. If the brand code is consistent, bind the RFID tag to the work process position.

8. The method according to claim 7, characterized in that, The method further includes: Binding failure is indicated when the product type code is inconsistent with the baseline product type and / or the brand code is inconsistent with the baseline product brand, wherein the baseline product type corresponds to the placement location of the RFID tag.

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