An intelligent packaging electronic tag information processing method based on internet of things article coding

Abstract

The application provides a kind of information processing method of smart packaging electronic tag based on internet of things article coding, it is related to internet of things smart packaging and radio frequency identification technical field, comprising: obtaining internet of things article coding of to-be-packaged article and writing into electronic tag;When multiple sub-packaging objects are loaded into parent packaging container, the physical arrangement sequence of sub-packaging object is obtained;Based on the sequence, different response delay waiting parameters are assigned to the electronic tags on the surface of each sub-packaging object and are issued and written, so that each electronic tag returns the code in time sequence order along the time axis when receiving group reading signal;The group reading broadcast signal is sent by the inspection node;The returned code is compared with the time interval value between adjacent receiving actions;If it is judged to be abnormal and early warning if it exceeds the preset interval standard. The application can directly locate the specific spatial orientation of the abnormal object inside the parent packaging container without opening the box.

Description

Technical Field

[0001] This invention relates to the field of IoT smart packaging and RFID technology, and in particular to a method for processing information from smart packaging electronic tags based on IoT item coding. Background Technology

[0002] Currently, in warehousing, logistics, and packaging management, the industry typically uses packaging materials with attached electronic tags for information collection and traceability of goods. In the packing process of a packaging line, automated equipment combines multiple sub-packages with individual electronic tags into a single mother packaging container for subsequent unified shipment. When the mother packaging container arrives at the logistics inspection point, the on-site RFID device transmits a group read broadcast signal to the mother packaging container, thereby batch-collecting the tag codes of all the sub-packages inside.

[0003] To handle concurrent responses from multiple electronic tags receiving radio frequency energy simultaneously, conventional tag group reading communication mechanisms often employ anti-collision algorithms for channel scheduling. Under this mechanism, the timing of data returned by each electronic tag is random. The inspection device passively receives each data packet and confirms the completeness of the item loading rate in the current packaging container by verifying the total number of feedback codes after the reading cycle ends.

[0004] This collision-avoidance-based reading method strips the link between the actual spatial arrangement of items and the timing of data transmission. When the number of feedback items reported by the inspection equipment is less than the expected number on the packing list, the system can only determine from the overall picture that a sub-package has been lost or that individual electronic tags have been damaged within the mother packaging container. Because the scattered data lacks spatial mapping references, operators cannot directly infer the specific three-dimensional location of the abnormal sub-package within the mother box. To locate the abnormal entity, subsequent verification work usually requires disassembling the entire box and manually counting and checking each layer, which increases the workload and time consumption in the logistics inspection process. Summary of the Invention

[0005] The purpose of this invention is to provide a smart packaging electronic tag information processing method based on Internet of Things item coding, so as to solve the technical problem that when performing electronic tag group reading and inspection on the mother packaging container, the random and disordered response of tag data makes it impossible to directly reverse locate the specific spatial location of lost or damaged packaging inside.

[0006] This invention provides a method for processing information from smart packaging electronic tags based on Internet of Things (IoT) item coding, comprising: Obtain the IoT item code corresponding to the item to be packaged; The IoT item code is written into an electronic tag attached to the surface of the packaging; The method for processing smart packaging electronic tag information based on IoT item coding is characterized in that it further includes: In the process of loading multiple sub-packages into a mother packaging container, the physical order in which each of the sub-packages enters the mother packaging container is obtained; Based on the physical arrangement order, different response delay waiting parameters are assigned to the electronic tags on the surface of each of the sub-packages; The response delay waiting parameter is sent out and written into the corresponding electronic tag, so that when a group reading broadcast signal is received, multiple electronic tags sequentially return the IoT item code according to the time axis order mapped by the response delay waiting parameter; At the logistics inspection node, the group reading broadcast signal is sent to the mother packaging container; Receive the IoT item codes returned sequentially from multiple electronic tags according to the timeline, and compare the time interval values ​​between adjacent receiving actions; If the time interval exceeds the preset interval benchmark, it is determined that the sub-packaged item is missing or the electronic tag is damaged inside the mother packaging container, and a packaging abnormality warning instruction is generated.

[0007] Optionally, obtaining the IoT item code corresponding to the item to be packaged includes: Receive packaging production task orders issued by the business management terminal; Extract the product model parameters and production batch serial number from the packaging production task sheet; The product model parameters and the production batch serial number are concatenated according to the general coding standard of the Internet of Things to generate a basic identifier string; An asymmetric encryption algorithm is used to encrypt the basic identifier string to generate the IoT item code.

[0008] Optionally, writing the IoT item code into an electronic tag attached to the surface of the packaging includes: The control packaging conveyor belt transports the packaged items to the RFID coding station; A write handshake request is sent to the electronic tag via the write antenna deployed at the radio frequency write station; After receiving the readiness confirmation frame from the electronic tag, the write data packet containing the IoT item code is pushed to the storage chip inside the electronic tag; The readback code embedded in the storage chip is read, and the readback code is compared with the IoT item code in the write data packet for identity verification.

[0009] Optionally, after performing the sameness verification between the readback encoding and the IoT item encoding in the write data packet, the method further includes: If the identity verification passes, a successful code writing confirmation message is sent to the business management terminal, and the packaging conveyor belt is controlled to continue running. If the identity check fails, a retry writing action is triggered; When the number of consecutive failed retry attempts reaches the retry limit threshold, the sorting robot arm is controlled to remove the corresponding package from the normal production queue and move it to the abnormal product sorting area.

[0010] Optionally, before obtaining the physical order in which the various sub-packages enter the mother packaging container in the process of loading multiple sub-packages into the mother packaging container, the method further includes: Collect the mother box identification code of the mother packaging container; Establish a hierarchical directory on the cloud server between the mother box identification code and the codes of the multiple IoT items to be loaded; The hierarchical mounting relationship directory is synchronized to the local cache database of the logistics inspection node so as to perform packing matching comparison when the IoT item code is received.

[0011] Optionally, obtaining the physical arrangement order of each of the sub-packages entering the mother packaging container includes: Activate the depth vision sensor installed at the end of the packing robot arm; The depth vision sensor is used to record the three-dimensional spatial coordinates of each time the packing robot places the sub-packaged item inside the mother packaging container; Calculate the timestamp corresponding to each placement action; The three-dimensional spatial coordinates are fused and sorted with the timestamp to generate the physical arrangement sequence that represents the hierarchy from the inside out.

[0012] Optionally, assigning different response delay parameters to the electronic tags on the surfaces of each of the sub-packages based on the physical arrangement order includes: Extract the sub-packaged item that was first placed into the mother packaging container and set the sub-packaged item as the inner layer reference object; Assign a minimum delay time value to the electronic tag corresponding to the inner layer reference object; For the remaining sub-packages that are subsequently placed, the corresponding cumulative delay step variable is calculated according to the hierarchical increment step size in the physical arrangement order; The minimum delay time value is added to the accumulated delay step variable to generate the response delay waiting parameter corresponding to each of the sub-packages.

[0013] Optionally, sending the group reading broadcast signal to the mother packaging container at the logistics inspection node includes: Monitor the movement of the mother packaging container on the logistics conveyor belt; When it is determined that the mother packaging container has entered the effective coverage area of ​​the radio frequency scanning tunnel, a synchronization trigger command is sent to all read and write antenna arrays in the radio frequency scanning tunnel. The read / write antenna array is controlled to radiate the group read broadcast signal to the mother packaging container at a preset maximum transmission power to wake up the multiple electronic tags that are in a dormant state.

[0014] Optionally, receiving the IoT item codes returned sequentially from the multiple electronic tags according to the timeline, and comparing the time interval values ​​between adjacent receiving actions, includes: Start the high-frequency clock timer; Record the initial arrival time of the first returned IoT item code; Record the current arrival time of each of the subsequently received IoT item codes; The time interval is calculated by subtracting the arrival time of the immediately preceding IoT item code from the current arrival time of the currently received IoT item code.

[0015] Optionally, if the time interval exceeds a preset interval benchmark, it is determined that the sub-packaged item is missing or the electronic tag is damaged inside the mother packaging container, and a packaging anomaly warning instruction is generated, including: Retrieve the fault tolerance fluctuation range value pre-stored in the local controller; The preset interval benchmark and the fault tolerance fluctuation range value are summed to obtain the dynamic tolerance limit threshold. When the time interval value is greater than the dynamic tolerance threshold, it is determined that a signal loss has occurred in the corresponding physical arrangement level. Based on the specific sequence number of the signal loss, the specific spatial location of the abnormal sub-packaged item within the mother packaging container can be determined in reverse. The packaging anomaly warning instruction, which contains the specific spatial location information, is pushed to the display terminal for prominent display.

[0016] The present invention has achieved the following beneficial effects: This invention achieves the following beneficial effects: By recording the physical order of each sub-package entering the mother packaging container during the packing process, and assigning different response delay parameters to each electronic tag accordingly, this invention enables multiple electronic tags that previously responded randomly and concurrently to transmit data in an orderly manner according to a specific timeline. This mechanism transforms the three-dimensional spatial arrangement logic of the sub-packages inside the mother box into a communication sequence mapping on a time axis. At the logistics inspection node, the inspection system only needs to receive the orderly returned codes and compare the time interval between two adjacent receiving actions. When the time interval exceeds a preset interval benchmark, it can be objectively determined that a signal is missing in a specific arrangement level. The system can directly deduce the specific spatial location of the abnormal sub-package inside the mother packaging container based on the specific time gap sequence number of the signal missing. This solution allows on-site personnel to conduct localized verification and inspection of specific spatial levels without having to fully unpack and disassemble the packaging containers for inventory checks when receiving anomaly alerts. This improves the efficiency of the logistics line in investigating situations such as the loss or damage of certain items and enhances its automated data processing capabilities.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0018] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is the main flowchart of the intelligent packaging electronic tag information processing method based on IoT item coding in this embodiment of the invention; Figure 2 This is a system module composition diagram of the hardware execution environment in an embodiment of the present invention; Figure 3 This is a flowchart of a method for obtaining the IoT item code corresponding to an item to be packaged, as described in an embodiment of the present invention. Figure 4 This is a flowchart illustrating the method for writing IoT item codes into electronic tags in an embodiment of the present invention; Figure 5 This is a flowchart illustrating the method for obtaining the physical arrangement order of sub-packaged items entering the mother packaging container in an embodiment of the present invention. Figure 6This is a flowchart of the method for allocating response delay waiting parameters in an embodiment of the present invention. Detailed Implementation

[0020] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] Reference Figure 1 As shown, this application discloses a method for processing information on smart packaging electronic tags based on IoT item coding. The underlying hardware execution environment (such as...) Figure 2 (As shown) It is mainly composed of a field-level packaging production line control system, a factory-level edge computing node, and a cloud-based scheduling network center. The field-level packaging production line control system is equipped with a main control programmable logic controller, a variable frequency drive servo motor group, a multi-dimensional spatial kinematic packing robot arm, a high-frequency industrial-grade vision sensing module, and an RFID read / write base station array with beamforming technology. The factory-level edge computing node is configured with an industrial gateway with concurrent processing threads and a real-time time-series database, responsible for handling interrupt requests generated by the field hardware and parsing streaming data. The cloud-based scheduling network center carries a distributed relational data cluster and coordinates the distribution of production scheduling tasks.

[0022] Specifically, the method for processing smart packaging electronic tag information based on IoT item coding includes the following steps: Step S10: Obtain the IoT item code corresponding to the item to be packaged; Step S20: Write the IoT item code into an electronic tag attached to the surface of the packaging; Step S30: In the process of loading multiple sub-packages into the mother packaging container, obtain the physical arrangement order of each sub-package entering the mother packaging container; Step S40: Based on the physical arrangement order, assign different response delay waiting parameters to the electronic tags on the surface of each of the sub-packages; Step S50: Send the response delay waiting parameter and write it into the corresponding electronic tag, so that when a group reading broadcast signal is received, multiple electronic tags sequentially return the IoT item code according to the time axis order mapped by the response delay waiting parameter; Step S60: At the logistics inspection node, send the group reading broadcast signal to the mother packaging container; Step S70: Receive the IoT item codes returned sequentially by the multiple electronic tags according to the time axis, and compare the time interval values ​​between adjacent receiving actions; Step S80: If the time interval value exceeds the preset interval benchmark, it is determined that the sub-packaged item is missing or the electronic tag is damaged inside the mother packaging container, and a packaging abnormality warning instruction is generated.

[0023] As a preferred implementation, before performing step S10, this embodiment further includes a network status detection step: within a preset time period, such as a daily cycle duration, a communication handshake connectivity test is performed between the business management terminal and the control network nodes of the packaging production line to obtain network status parameters and record them as the basic environment configuration for data distribution. Specifically, the system collects the connection health status between the business management terminal (i.e., the server equipment installed inside the data center, used to calculate and monitor the operating load of each actuator and the queuing degree of the task queue instruction sequence) and each edge computing node device at a set frequency through the industrial Ethernet interface. By setting control measurement points at different workstations, the network connectivity status of different areas of the production line is focused, thereby accurately locating the transmission fault location of business data flow; at the same time, by statistically fusing the handshake message data of multiple workstation network nodes, the limitations of false alarms due to single communication link disconnections are effectively reduced. The statistical fusion described here has a clear underlying Boolean voting extraction step: the system sets a sliding monitoring window with a fixed time span, and concurrently collects handshake connectivity receipts from M (M≥3) adjacent edge computing nodes in the same physical segment of the pipeline within this window; if, within the same period, only a single node continuously returns a timeout anomaly, while the remaining M-1 nodes report normal communication, the logic judgment unit determines, based on majority voting Boolean logic, that the anomaly is an independent false alarm caused by a momentary loosening of the network cable interface or local electromagnetic pulse interference, and does not trigger a shutdown command; only when the proportion of nodes that return timeout anomalies reaches or exceeds a preset topology failure threshold (this threshold is, for example, set to 2 / 3 of the total number of nodes in this segment, and the rounding rule is applied), does the system confirm that a real physical circuit has occurred in the backbone ring network, and thus generate an underlying network interruption alarm.

[0024] Specifically, such as Figure 3 As shown, in step S10, obtaining the IoT item code corresponding to the item to be packaged includes: receiving a packaging production task order issued by the business management terminal; extracting the product model parameter and production batch serial number from the packaging production task order; concatenating the product model parameter and the production batch serial number according to the IoT general coding standard to generate a basic identifier string; and performing an encryption operation on the basic identifier string using an asymmetric encryption algorithm to generate the IoT item code.

[0025] The process of receiving packaging production task orders from the business management terminal specifically includes: during the start-up phase of a single production cycle, the business management terminal deployed in the management room of the enterprise resource planning system generates a packaging production task order for the current work order based on a scheduling algorithm. The scheduling algorithm can employ conventional heuristic rule algorithms or priority-based scheduling models, primarily based on constraints such as the current workshop equipment idle status, order delivery priority, and material inventory to calculate and generate the packaging production task order. This algorithm is a mature existing technology in industrial manufacturing execution systems (MES) and will not be elaborated upon here. The packaging production task order is encapsulated using a structured markup language message. Its header includes routing addressing medium access control layer information and the destination network interconnection protocol address, while the message body embeds multi-dimensional data nodes representing product identity and batch characteristics. During data distribution, the business management terminal, acting as a message producer, asynchronously delivers and pushes the encapsulated packaging production task order to the publish / subscribe topic channel using message queue middleware technology. Meanwhile, the background resident program within the factory-level edge computing node continuously polls and listens for the subscribed topic channels. When a new message object is detected, the background resident program requests the allocation of a high-speed cache memory block and migrates the message object from the network interface controller's receive circular buffer to the user-space memory space. Subsequently, the data verification module in the edge computing node performs cyclic redundancy check and calculation on the extracted message body using polynomial division logic, and compares the calculated value with the original checksum value attached to the end of the message using logical bit operations: if the comparison results are the same, a successful reception confirmation is returned to the business management terminal; if they are different, the message object in the current memory block is discarded and a selective retransmission request is initiated to the business management terminal until a packaged production task order without bit errors is obtained.

[0026] The specific implementation mechanism for extracting parameters from the packaging production task order and concatenating them to generate the basic identifier string is as follows: The factory-level edge computing node first calls the built-in structure parsing engine to perform lexical scanning and syntax tree construction on the message body; then, the cursor, according to the breadth-first traversal algorithm, locks the node corresponding to the product model parameter (identifier specification attribute) and the node corresponding to the production batch serial number (identifier traceability information) in the object model tree, and extracts their character data into the register array. Next, the data cleaning module performs legality screening on the above parameters (such as eliminating redundant spaces beforehand and detecting out-of-bounds characters to prevent abnormal interruptions), and then saves the cleaned parameters separately for later use.

[0027] During the concatenation process, the system's central processing unit allocates a contiguous bit storage matrix in main memory as the concatenation work area. After writing the header value of the declared version at the beginning, dynamic data alignment and number system conversion are performed on the two sets of parameters. The converted binary bitstream is sequentially pushed into dedicated bit fields conforming to the general specification template of electronic commodity codes. If the bitstream length does not reach the maximum capacity of the bit field, the concatenation module will activate the high-bit padding mechanism, continuously filling logical zeros before the most significant bit until the target is reached. After all blocks are pushed and padded, the system uses a memory snapshot to extract the overall data stream and generate a contiguous and semantically continuous basic identifier string.

[0028] The specific implementation mechanism for encrypting the basic identifier string using an asymmetric encryption algorithm to generate IoT item codes includes the following steps: First, the system's central processing unit (CPU) transmits the concatenated basic identifier string as plaintext data to the data input register of the hardware encryption coprocessor configured inside the factory-level edge computing node via a bus. Then, the hardware encryption coprocessor activates its internal random number generator to generate a specific scrambling factor and XORs it with the basic identifier string. Next, the hardware encryption coprocessor calls its built-in elliptic curve cryptography operator, using a set of asymmetric encryption private keys pre-programmed into its non-volatile memory and only supported for internal chip access, to perform modular multiplication and scalar multiplication operations on the basic identifier string after scrambling. Over multiple rounds of computation, the original bit order of the basic identifier string is scrambled and rearranged, mapped to a specific group of coordinate points in the elliptic curve coordinate system. After the computation is complete, the hardware encryption coprocessor converts the final coordinate point values ​​into a linear byte stream and transmits it back via the bus.

[0029] To resolve the physical compatibility issue between the large-capacity ciphertext generated by elliptic curve operations and the limited capacity of the underlying industrial standard electronic tag storage medium, the system executes truncation and mapping adaptation rules: For electronic tags conforming to the global electronic product code (EPC Gen2) physical specification, the typical capacity limit of its memory EPC sector is 96 bits or 128 bits; the system calls a hardware fixed-length bitmask truncation instruction to extract specific bit segments with high avalanche confusion characteristics and entropy values ​​from the aforementioned linear byte stream (specifically, extracting the bit sequence from the least significant bit to the 96th bit), and finally the system's central processing unit receives the linear byte stream and solidifies it into the IoT item code.

[0030] Understandably, after the encoding calculation is completed and temporarily stored, the operation enters the on-site physical coding execution stage. The packaged goods with blank electronic tags are carried by the packaging conveyor belt. The speed of the packaging conveyor belt is controlled by closed-loop feedback from a variable frequency drive servo motor unit.

[0031] Specifically, such as Figure 4As shown, in step S20, writing the IoT item code into an electronic tag attached to the surface of the packaging includes: controlling the packaging conveyor belt to transport the packaging to the RFID coding station; sending a write handshake request to the electronic tag through a coding antenna deployed at the RFID coding station; after receiving a ready confirmation frame from the electronic tag, pushing the write data packet containing the IoT item code to the storage chip inside the electronic tag; reading the readback code embedded in the storage chip, and performing an identity verification between the readback code and the IoT item code in the write data packet.

[0032] The specific implementation process of writing IoT item codes into electronic tags on the surface of packaging involves a hardware and software collaborative workflow: First, when a package with a blank electronic tag is moved by a conveyor belt to the entrance of the RFID coding station, a side-mounted photoelectric diffuse reflection sensor captures a photoelectric trigger signal. Combined with the displacement feedback from the high-resolution absolute rotary encoder at the end of the main drive shaft, the main programmable logic controller accurately determines that the package has entered the coding area and controls the variable frequency drive servo motor to smoothly decelerate based on the speed planning curve, so that the package precisely stops at the center of the radiated energy field directly below the coding antenna. Next, the coding antenna, deployed at this station and using a directional circular polarization design, continuously radiates alternating electromagnetic field energy downwards. After the electronic tag absorbs energy and resets, the RFID read / write base station loads and sends a card writing handshake request according to the anti-collision communication protocol.

[0033] Subsequently, upon receiving the readiness confirmation frame from the electronic tag via backscatter modulation, the base station pushes and permanently stores the write data packet (containing the write instruction code, target address offset, and operation verification code) containing the IoT item code into the floating-gate transistor of the electronic tag's internal storage chip, bit by bit. After the write operation is completed, the base station sends a read command again within a set delay window to obtain the readback code stored in the storage chip. Finally, the main programmable logic controller performs a bitwise XOR comparison between the readback code and the IoT item code in the original write data packet: if the XOR result matrix is ​​all logic zeros, it means there is a correspondence at the bit level, and the identity check passes; if a logic non-zero value is detected, it is determined that a bit flip or shift error has occurred, and the check fails.

[0034] Specifically, after verifying the similarity between the readback code and the IoT item code in the write data packet, the process further includes: if the similarity verification passes, sending a successful write confirmation message to the business management terminal and controlling the packaging conveyor belt to continue running; if the similarity verification fails, triggering a retry write operation; when the number of consecutive failed write retries reaches the retry upper limit threshold, controlling the sorting robot arm to remove the corresponding package from the normal production queue to the abnormal product sorting area. The specific range of the retry upper limit threshold, considering the cycle speed of the packaging conveyor belt and the handshake time for a single RFID write operation, is set to, for example, 3 to 5 times.

[0035] After completing the above identity verification, the system will trigger the corresponding branch processing logic according to the verification result: if the identity verification passes, the main control programmable logic controller will encapsulate the successful verification status mark into an Ethernet message and push it to the business management terminal, release the data lock in the system-level database and mark it as coded and flowing; at the same time, a voltage signal is applied to the servo drive module to drive the packaging conveyor belt to smoothly restore the set linear speed and push the packaged goods with solidified digital identity to the downstream packing section.

[0036] Conversely, if the identity verification fails, a retry of the coding action is triggered. At this time, the main programmable logic controller (PLC) pauses the conveyor belt to maintain the spatial stillness of the packaged goods. It avoids interference from the same-channel noise floor by adjusting the RF output power of the directional coding antenna and switching the RF continuous wave channel frequency. Then, it re-initiates the handshake and data push operation, forming a single retry cycle. A dedicated register within the system accumulates and counts the failure return codes. When the number of consecutive failed coding retries reaches a preset retry limit, the system determines that the electronic tag has physical structural damage. At this point, the main PLC blocks RF energy transmission and controls the pneumatic sorting arm on the side to extend a high-speed push rod, pushing the corresponding abnormal packaged goods out of the conveyor belt guide rail constraint boundary and removing them from the abnormal product sorting area to achieve physical isolation.

[0037] Understandably, a convergence conveyor track is provided at the rear of the packaging line, where multiple individually coded sub-packages gather. The automated packing station is responsible for grouping the sub-packages into the mother packaging container. Before executing step S30 to obtain the physical arrangement order of each sub-package entering the mother packaging container, the process includes: collecting the mother box identification code of the mother packaging container; establishing a hierarchical mapping directory between the mother box identification code and the codes of the multiple IoT items to be packed in the cloud server; and synchronizing the hierarchical mapping directory to the local cache database of the logistics inspection node so as to perform packing matching comparison when the IoT item codes are received.

[0038] The preliminary step for obtaining the physical arrangement order of the packing, namely the establishment and synchronization process of the hierarchical mounting relationship directory required for packing legality comparison, specifically includes: First, when the mother packaging container is pushed to the packing station along the auxiliary conveyor belt, the industrial barcode reader on the side captures the barcode image on its side surface, eliminates perspective distortion and local dirt interference through an internal decoding algorithm, restores the mother box identification code, and uploads it to the edge computing node. The internal decoding algorithm mainly includes mature image preprocessing and spatial transformation techniques in the field. Specifically, it extracts the barcode outline through edge detection and binarization, and uses standard affine transformation or perspective transformation matrices to perform pixel remapping correction for distortion caused by the sensor shooting angle, thereby accurately restoring the barcode features. Subsequently, the edge computing node obtains the IoT item code set of multiple sub-packages expected to be packed into the mother box according to the local production batch pre-allocation list, and encapsulates this set and the mother box identification code into an SQL message to request the cloud server. The cloud server's database management system uses the master box identifier as the primary key and the codes of each IoT item as secondary table records, establishing a hierarchical directory with a subordinate relationship architecture within the tablespace. Finally, the cloud server uses a message middleware system to proactively push incremental data packets of this directory to the local cache database of the edge industrial control computer at the logistics inspection node. By allowing cloud data to be stored locally, subsequent received return codes can be used to perform high-speed packing validity comparisons in local memory.

[0039] Specifically, such as Figure 5 As shown, in step S30, obtaining the physical arrangement order of each of the sub-packages entering the mother packaging container includes: activating a depth vision sensor installed at the end of the packing robot arm; using the depth vision sensor to record the three-dimensional spatial coordinates of each time the packing robot arm places the sub-packages inside the mother packaging container; calculating the timestamps corresponding to each placement action; and fusing and sorting the three-dimensional spatial coordinates and the timestamps to generate the physical arrangement order that represents the arrangement hierarchy from the inside out.

[0040] For the specific implementation process of obtaining the three-dimensional spatial coordinates of the sub-packaged items entering the mother packaging container, this embodiment uses a multi-degree-of-freedom serial articulated packing robot arm. Its foremost flange is equipped with components for gripping items, and the depth vision sensor is mounted on a support near this flange. In the initial stage when the packing robot arm grips the first sub-packaged item from the buffer area and moves it towards the mother packaging container, the main programmable logic controller sends a trigger signal to the depth vision sensor. After the sensor is activated, its structured light emission module projects a speckle pattern into the interior of the mother container. The photosensitive array then captures the reflected image with speckle distortion and sends the data to the image signal processor. The processor performs distance calculation by analyzing the speckle offset and outputs a point cloud dataset reflecting the depth information of the interior environment of the mother container in real time.

[0041] Subsequently, as the packing robot arm moves the grasped sub-package to the predetermined space and performs a release action, the robot arm's controller locks the absolute encoder values ​​of each servo joint motor and uses a kinematics calculation algorithm to calculate the position vector of the end effector flange in the coordinate system. This kinematics calculation algorithm is based on the standard Denavit-Hartenberg (DH) parametric model in the robotics field. By substituting the pre-calibrated physical lengths of each link of the packing robot arm and the real-time joint rotation angles fed back by the absolute encoders into the forward kinematic homogeneous transformation matrix, it can accurately calculate the three-dimensional spatial position vector of the robot arm's end effector flange in the world coordinate system. Combining the aforementioned point cloud dataset, the master control algorithm executes a geometric centering logic based on a rigid boundary in three-dimensional space to replace the computationally intensive surface fitting: The system first removes low-noise point clouds whose absolute height Z-axis coordinates are within a tolerance range of 3 mm to 5 mm above the bottom reference surface of the mother box; for the remaining effective point set of the upper surface contour of the sub-package, it iterates through and extracts the maximum and minimum physical coordinate values ​​on the horizontal width X-axis and the depth transmission Y-axis to construct the minimum bounding rectangle boundary; the maximum and minimum values ​​of the X-axis and Y-axis are added together and divided by 2 to obtain the coordinates of the geometric diagonal intersection of the horizontal two-dimensional plane; at the same time, the arithmetic mean of all effective points in the point set on the Z-axis coordinate is extracted; finally, the directly calculated values ​​of these three dimensions are arrayed and combined to output the accurately calculated three-dimensional offset vector. Finally, the system performs coordinate system transformation and vector addition on the position vector and the three-dimensional offset vector to generate the three-dimensional spatial coordinates representing the actual placement position of the sub-package; wherein, the horizontal axis and depth axis coordinates are used to determine the placement matrix position of the object in the plane inside the box, and the vertical height axis coordinates are used to mark the height level of the object embedded in the mother box.

[0042] The process of calculating timestamps and generating the physical arrangement order is as follows: First, at the edge transition of the trigger signal of the release motion sensor of the packing robot arm, the controller's underlying service program activates and accesses the register of the built-in clock synchronization module, locks the current time data accurate to microseconds, and converts it into a timestamp for a single placement action. The system stores this timestamp and the aforementioned three-dimensional spatial coordinates in memory in both spatiotemporal dimensions, generating multiple sets of data forms. Subsequently, the system executes a reconstruction and sorting algorithm on these data forms: establishing an initial placement sequence based on time sequence as the primary benchmark, and introducing the vertical height axis coordinate as a verification parameter, arranging the timestamps in chronological order to form an initial time sequence; for this initial time sequence, executing verification logic based on physical stacking space constraints: given that the loading of sub-packages into the mother packaging container is a bottom-up physical stacking process, under normal conditions, its vertical height axis coordinate should show a non-decreasing trend with the time sequence; calculating the difference in vertical height axis coordinates between adjacent preceding and following actions in the sequence; if the vertical height axis coordinate of the preceding action... If the vertical height axis coordinate of the next action is greater than the vertical height axis coordinate of the subsequent action, and the absolute value of the difference between the two exceeds the preset physical height tolerance threshold (this physical height tolerance threshold is set to 10% to 20% of the standard height dimension of a single sub-package), then it is determined that the local timing record is misaligned due to the robot arm occlusion or the visual sensor's image acquisition delay. The correction logic triggered at this time is as follows: execute the data address pointer swap instruction, swap the ranking order of the two adjacent actions in the unidirectionally increasing index array, and continue to traverse and verify until the vertical height axis coordinates of all nodes in the array strictly meet the non-decreasing rigid physical constraint condition. After this spatiotemporal dimension fusion processing, the system finally generates a unidirectionally increasing index array (the head of the array corresponds to the bottom of the box, and the tail corresponds to the top layer of the box near the opening), which represents the physical arrangement order of the hierarchical levels from the inside to the outside.

[0043] It is understandable that after obtaining the physical arrangement sequence, the system enters the parameter mapping stage.

[0044] Specifically, such as Figure 6 As shown, in step S40, assigning different response delay waiting parameters to the electronic tags on the surfaces of each of the sub-packages based on the physical arrangement order includes: extracting the first sub-package placed into the mother packaging container and setting the sub-package as the inner layer reference; assigning a minimum delay time value to the electronic tag corresponding to the inner layer reference; for the remaining sub-packages placed subsequently, calculating the corresponding cumulative delay step variable according to the hierarchical increment step size in the physical arrangement order; and adding the minimum delay time value and the cumulative delay step variable to generate the response delay waiting parameter corresponding to each sub-package.

[0045] After obtaining the physical arrangement order, the system will assign different response delay waiting parameters to each electronic tag based on this order. The specific allocation mechanism includes: First, the edge computing gateway accesses a unidirectionally increasing index array fixed in local memory and locates the first address space of the array. The system extracts the IoT item code and three-dimensional spatial coordinate parameters contained in the recorded nodes in this space, loads them into the dedicated variable space of the logic operation area, and thus sets the sub-packaged item located at the bottom of the parent packaging container and placed first as the inner layer reference. Next, the data processing thread retrieves the preset hardware RF link startup time parameters (covering the time required for the tag chip to capture energy, establish voltage regulation, and power-on reset), sums them with the preset clock redundancy period, generates the minimum delay time value, and binds it to the electronic tag corresponding to the inner reference object. It should be noted that the reason for introducing the clock redundancy period is that the voltage doubler rectifier circuit inside the passive electronic tag chip objectively requires a physical charging time to climb from 0 potential to the logic gate steady-state threshold voltage (typically nominally 1.2V) when capturing spatial microwaves and charging the on-chip voltage regulator capacitor. In order to ensure that the inner reference object located at the bottom of the mother box with poor reception conditions has sufficient power-on setup time and avoids internal countdown scrambling due to undervoltage, the specific value range of the clock redundancy period is set by the system to be between 1.5 milliseconds and 2.5 milliseconds.

[0046] For the remaining sub-packages that are subsequently added, the control logic module initiates a traversal operation on all subsequent nodes of the unidirectionally increasing index array and extracts the topological ranking number of each node. After removing the basic index bias, the arithmetic logic unit performs a multiplication operation on this number with a pre-set hierarchical increasing step size (time scalar parameter) to generate an accumulated delay step variable and temporarily stores it in the cache. To achieve physical isolation of backscattered signals from multiple electronic tags on the time axis and avoid radio frequency (RF) conflicts, the derivation and determination steps for the hierarchical incremental step size are as follows: The control unit extracts the total bit length of the message frame composed of the IoT item code and communication check bit, divides it by the backscattered link data transmission rate (baud rate) configured in the current RF reader, and calculates the theoretical physical transmission time of a single complete message over the air interface; subsequently, a collision prevention gap (limited to 15% to 25% of the theoretical physical transmission time) is set to reserve space for the RF base station to dissipate noise floor and clear the channel; finally, the theoretical physical transmission time and the collision prevention gap are summed, and the result is set as the hierarchical incremental step size. Finally, the system's arithmetic logic unit executes an addition instruction to sum the aforementioned minimum delay time value with the accumulated delay step variable. The sum is processed and converted into control parameters conforming to the tag communication specification, thus generating the response delay waiting parameters specific to each sub-package.

[0047] Understandably, step S50 is executed. The system reassembles the response delay waiting parameters corresponding to each of the sub-packages with the corresponding IoT item codes and stores the data in the communication transmission queue. A directional coding antenna is deployed at the side of the packing station. During the interval when the packing robot arm completes the placement action, the main programmable logic controller drives the directional coding antenna to write the corresponding response delay waiting parameters in the communication transmission queue into the control sector inside the electronic tag on the surface of the just-placed object. After the writing operation is completed, when multiple electronic tags are subsequently awakened by external energy, the internal state machine retrieves the parameters in the control sector and loads them into a countdown timer to execute the countdown decrement; the RF front end remains silent until it reaches zero; after the underflow reaches zero, the backscatter circuit is driven to transmit a signal.

[0048] Specifically, in step S60, sending the group reading broadcast signal to the mother packaging container at the logistics inspection node includes: monitoring the movement position of the mother packaging container on the logistics conveyor belt; when it is determined that the mother packaging container has entered the effective coverage area of ​​the radio frequency scanning tunnel, sending a synchronization trigger command to all read and write antenna arrays in the radio frequency scanning tunnel; and controlling the read and write antenna arrays to radiate the group reading broadcast signal to the mother packaging container at a preset maximum transmission power to wake up the multiple electronic tags that are in a dormant state.

[0049] The monitoring and triggering mechanism for sending a group reading broadcast signal to the mother packaging container at the logistics inspection node is as follows: The system continuously projects a vertical beam of light into the channel through a ranging sensor fixedly installed at the entrance of the conveyor belt; when the mother packaging container moves forward and blocks the beam of light, the edge control computer captures the status pulse and triggers the displacement tracking thread. In order to reduce the computing power consumption of software-level estimation and ensure the microsecond-level real-time performance of industrial control, this thread directly reads the cumulative effective pulse count value fed back by the absolute rotary encoder at the back end of the frequency converter driver, and executes the underlying discrete physical displacement conversion logic: multiply the cumulative effective pulse count value by a pre-calibrated single-pulse mechanical displacement equivalent (the single-pulse mechanical displacement equivalent is calculated by dividing the physical perimeter of the outer edge of the active drive roller of the packaging conveyor belt by the total resolution of a single turn calibrated on the encoder nameplate), and accurately calculates the specific longitudinal displacement distance of the mother packaging container on the conveyor belt through the underlying hardware multiplication instruction.

[0050] When the area determination module determines that the longitudinal displacement distance has crossed the preset threshold range of the shielded anechoic chamber boundary model (i.e., entered the effective coverage area of ​​the RF scanning tunnel), the edge control computer immediately broadcasts a synchronization trigger command to the underlying RF reader node via the bus. After parsing the command and achieving action synchronization, the underlying RF reader node quickly adjusts its output gain to the maximum transmit power, controlling multiple sets of read / write antenna arrays within the shielded anechoic chamber structure to generate an alternating electromagnetic radiation field, radiating microwave energy to the mother packaging container. Multiple dormant electronic tags attached to the surface of the sub-package absorb this microwave energy and, after their power supply exceeds the activation threshold, successively reset and demodulate the group read broadcast signal. Subsequently, they activate their internal decrementing counters, relying on their internal time base and according to their respective exclusive response delay waiting parameters, to perform an exclusive countdown decay action.

[0051] Specifically, in step S70, receiving the IoT item codes returned sequentially from the multiple electronic tags according to the time axis order and comparing the time interval values ​​between adjacent receiving actions includes: starting a high-frequency clock timer; recording the initial arrival time of the first returned IoT item code; recording the current arrival time of each subsequently received IoT item code; and subtracting the arrival time of the immediately preceding IoT item code from the current arrival time of the currently received IoT item code to calculate the time interval value.

[0052] The specific mechanism for starting the high-frequency clock timer and recording the arrival time of the first return code includes: a timing module with an oscillator-powered clock source is configured on the motherboard of the underlying RF reader node. At the instant the reader antenna array completes the group read broadcast signal transmission and switches to receive mode, the digital trigger array inside the timing module starts synchronously, monotonically accumulating the input clock pulses. Because the delay waiting parameter value assigned to the inner reference tag at the bottom of the enclosure is the smallest, its internal counter triggers the zero-bit underflow interrupt first and performs RF backscattering. When the reader antenna array captures the RF message, and the demodulation module of the receiving channel identifies the first message, the controller generates a capture signal and triggers the internal latching logic, latching the current count value of the timing module into the time register. The data processing module then converts this count value into a floating-point time variable, recording it as the initial arrival time. Simultaneously, the demodulated first IoT item code is uploaded to the edge control computer memory via the interface.

[0053] The specific process for continuously receiving subsequent IoT item codes and calculating adjacent time intervals includes: Electronic tags located at other height levels of the parent packaging container, bound to different incrementing step variables, will have their internal counters sequentially reach the zero-trigger point according to their physical arrangement, and then successively scatter the IoT item codes in reverse. During this period, the underlying RFID reader nodes maintain a listening state. Whenever the decoding module completely parses the message data scattered by the subsequent electronic tag, the system synchronously captures the incrementing timer module value to form a timestamp data stream. This data stream is sequentially pushed into a circular buffer queue, each instance serving as the current arrival time of each code.

[0054] Subsequently, the analysis thread of the edge control computer is initiated. The system uses a cursor to point to the latest data node in the buffer queue to retrieve the current arrival time value, and then moves the cursor back by the corresponding offset to retrieve the arrival time value of the preceding adjacent node. The arithmetic unit then executes a subtraction instruction, subtracting the arrival time of the immediately preceding received code from the arrival time of the currently received code. The absolute difference obtained from this subtraction operation represents the relative time span between two adjacent data arrival actions, which is the time interval value.

[0055] Specifically, in step S80, if the time interval value exceeds the preset interval benchmark, it is determined that the sub-packaged item is missing or the electronic tag is damaged inside the mother packaging container, and a packaging anomaly warning instruction is generated, including: retrieving the fault tolerance fluctuation range value pre-stored in the local controller; summing the preset interval benchmark and the fault tolerance fluctuation range value to obtain a dynamic tolerance limit threshold; it should be noted that since the passive electronic tag chip mainly relies on the resistor-capacitor (RC) oscillation circuit to provide the countdown clock benchmark, it is easily affected by ambient temperature or microwave wake-up energy fluctuations, resulting in inherent frequency drift. Therefore, the fault tolerance fluctuation range value is a dynamic variable derived from the underlying hardware physical tolerance. The specific derivation method is as follows: Extract the maximum internal clock drift rate percentage specified in the batch of electronic tag specifications (e.g., a range set to ±1.5% to ±3.5%), multiply the accumulated delay step variable corresponding to the current level by this maximum internal clock drift rate percentage, and calculate the maximum time drift error limit caused by hardware time base jitter; then, add this to the maximum signal decision delay constant caused by multipath reflection in the RF cavity space (e.g., set to 50 microseconds), and the sum of the two is the dynamically constructed fault tolerance fluctuation range value. Therefore, the longer the countdown wait for a tag, the more proportionally the automatically assigned fault tolerance dynamic tolerance limit increases based on the actual hardware physical error. When the time interval value is greater than the dynamic tolerance threshold, it is determined that a signal loss has occurred in the corresponding physical arrangement level. The specific logic judgment condition and underlying data mapping extraction steps for reverse positioning are as follows: the system enters the logic of deducing the number of missing tags and spatial reverse addressing; the arithmetic logic unit first extracts the time interval value that is determined to be overflowing, divides it by the aforementioned deduced hierarchical increment step size, and performs a floor operation on the obtained quotient to accurately calculate the number of missing sub-packages that have continuously lost signals; then, the system extracts the IoT item code that was most recently successfully received before the abnormal blank period as the reference anchor point, and retrieves and locks it in the hierarchical mounting relationship directory cached locally. The normal physical ranking number corresponding to the reference anchor point; based on this normal physical ranking number, the previously calculated number of lost items is accumulated according to the integer increment rule, thereby obtaining one or more actual abnormal ranking numbers of signal loss; finally, the system uses the actual abnormal ranking number as the target query key value to initiate a search in the data form containing three-dimensional spatial coordinates established in step S30, directly extracting the horizontal axis, depth axis and vertical height axis parameters that are strictly bound to the abnormal ranking number in the mapping table, thereby accurately locating the specific spatial orientation of the abnormal sub-package within the mother packaging container; the packaging abnormality warning instruction containing the specific spatial orientation information is pushed to the display terminal for prominent display.

[0056] After obtaining the time interval value, the system executes a comprehensive logic to determine packaging anomalies and generate warning commands. Considering that objective physical factors such as electromagnetic wave cavity reflection interference and label element manufacturing tolerances can cause jitter in the actual scattering time, the local controller's read thread first retrieves the pre-stored fault tolerance fluctuation range value from the file system, and the arithmetic logic module adds it to the preset interval benchmark (i.e., the previously allocated hierarchical incremental step size). This fusion result broadens the judgment boundary of the normal reception time window, thereby constructing a dynamic tolerance threshold.

[0057] Subsequently, the digital comparison logic module performs threshold determination: comparing each time interval value with the latched dynamic tolerance threshold. If the time interval value is greater than the threshold and an overflow flag is thrown, it proves that there is an abnormal blank period in the receiving time domain, and the system determines that a signal loss has occurred in the corresponding physical arrangement level. At this time, the system synchronously records the cursor value currently in the traversal queue as the specific sequence number, and uses this as an index to query the hierarchical mounting relationship directory of the local cache, and reversely locates the specific spatial location of the abnormal sub-package within the mother packaging container. Finally, the communication service module packages the mother box identification code, specific spatial location parameters, and abnormal alarm characters into a packaging abnormality early warning command, and pushes it to the graphic display workstation in the logistics center. The workstation's rendering engine generates colored pixel block graphics inside the perspective model of the mother packaging container based on this coordinate point to achieve a highlighted display for the operator.

[0058] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for processing information from electronic tags on smart packaging based on Internet of Things (IoT) item coding, comprising: Obtain the IoT item code corresponding to the item to be packaged; The IoT item code is written into an electronic tag attached to the surface of the packaging; The method for processing smart packaging electronic tag information based on IoT item coding is characterized in that it further includes: In the process of loading multiple sub-packages into a mother packaging container, the physical order in which each of the sub-packages enters the mother packaging container is obtained; Based on the physical arrangement order, different response delay waiting parameters are assigned to the electronic tags on the surface of each of the sub-packages; The response delay waiting parameter is sent out and written into the corresponding electronic tag, so that when a group reading broadcast signal is received, multiple electronic tags sequentially return the IoT item code according to the time axis order mapped by the response delay waiting parameter; At the logistics inspection node, the group reading broadcast signal is sent to the mother packaging container; Receive the IoT item codes returned sequentially from multiple electronic tags according to the timeline, and compare the time interval values ​​between adjacent receiving actions; If the time interval exceeds the preset interval benchmark, it is determined that the sub-packaged item is missing or the electronic tag is damaged inside the mother packaging container, and a packaging abnormality warning instruction is generated.

2. The method for processing information on intelligent packaging electronic tags based on IoT item coding according to claim 1, characterized in that, The process of obtaining the IoT item code corresponding to the item to be packaged includes: Receive packaging production task orders issued by the business management terminal; Extract the product model parameters and production batch serial number from the packaging production task sheet; The product model parameters and the production batch serial number are concatenated according to the general coding standard of the Internet of Things to generate a basic identifier string; An asymmetric encryption algorithm is used to encrypt the basic identifier string to generate the IoT item code.

3. The method for processing information on intelligent packaging electronic tags based on IoT item coding according to claim 2, characterized in that, The step of writing the IoT item code into an electronic tag attached to the surface of the packaging includes: The control packaging conveyor belt transports the packaged items to the RFID coding station; A write handshake request is sent to the electronic tag via the write antenna deployed at the radio frequency write station; After receiving the readiness confirmation frame from the electronic tag, the write data packet containing the IoT item code is pushed to the storage chip inside the electronic tag; The readback code embedded in the storage chip is read, and the readback code is compared with the IoT item code in the write data packet for identity verification.

4. The method for processing information of intelligent packaging electronic tags based on IoT item coding according to claim 3, characterized in that, After performing the sameness verification between the readback code and the IoT item code in the write data packet, the method further includes: If the identity verification passes, a successful code writing confirmation message is sent to the business management terminal, and the packaging conveyor belt is controlled to continue running. If the identity check fails, a retry writing action is triggered; When the number of consecutive failed retry attempts reaches the retry limit threshold, the sorting robot arm is controlled to remove the corresponding package from the normal production queue and move it to the abnormal product sorting area.

5. The method for processing information on intelligent packaging electronic tags based on IoT item coding according to claim 1, characterized in that, Before obtaining the physical order in which the various sub-packages enter the mother packaging container in the process of loading multiple sub-packages into the mother packaging container, the method further includes: Collect the mother box identification code of the mother packaging container; Establish a hierarchical directory on the cloud server between the mother box identification code and the codes of the multiple IoT items to be loaded; The hierarchical mounting relationship directory is synchronized to the local cache database of the logistics inspection node so as to perform packing matching comparison when the IoT item code is received.

6. The method for processing information on intelligent packaging electronic tags based on IoT item coding according to claim 1, characterized in that, The process of obtaining the physical arrangement order of each of the sub-packages entering the mother packaging container includes: Activate the depth vision sensor installed at the end of the packing robot arm; The depth vision sensor is used to record the three-dimensional spatial coordinates of each time the packing robot arm places the sub-packaged item inside the mother packaging container; Calculate the timestamp corresponding to each placement action; The three-dimensional spatial coordinates are fused and sorted with the timestamp to generate the physical arrangement sequence that represents the hierarchy from the inside out.

7. The method for processing intelligent packaging electronic tag information based on IoT item coding according to claim 6, characterized in that, The method of assigning different response delay parameters to the electronic tags on the surface of each of the sub-packages based on the physical arrangement order includes: Extract the sub-packaged item that was first placed into the mother packaging container and set the sub-packaged item as the inner layer reference object; Assign a minimum delay time value to the electronic tag corresponding to the inner layer reference object; For the remaining sub-packages that are subsequently placed, the corresponding cumulative delay step variable is calculated according to the hierarchical increment step size in the physical arrangement order; The minimum delay time value is added to the accumulated delay step variable to generate the response delay waiting parameter corresponding to each of the sub-packages.

8. The method for processing intelligent packaging electronic tag information based on IoT item coding according to claim 1, characterized in that, The step of sending the group reading broadcast signal to the mother packaging container at the logistics inspection node includes: Monitor the movement of the mother packaging container on the logistics conveyor belt; When it is determined that the mother packaging container has entered the effective coverage area of ​​the radio frequency scanning tunnel, a synchronization trigger command is sent to all read and write antenna arrays in the radio frequency scanning tunnel. The read / write antenna array is controlled to radiate the group read broadcast signal to the mother packaging container at a preset maximum transmission power to wake up the multiple electronic tags that are in a dormant state.

9. The method for processing intelligent packaging electronic tag information based on IoT item coding according to claim 1, characterized in that, The step of receiving the IoT item codes returned sequentially from multiple electronic tags according to the timeline and comparing the time interval values ​​between adjacent receiving actions includes: Start the high-frequency clock timer; Record the initial arrival time of the first returned IoT item code; Record the current arrival time of each of the subsequently received IoT item codes; The time interval is calculated by subtracting the arrival time of the immediately preceding IoT item code from the current arrival time of the currently received IoT item code.

10. The method for processing information of intelligent packaging electronic tags based on IoT item coding according to claim 9, characterized in that, If the time interval exceeds a preset interval benchmark, it is determined that the sub-packaged item is missing or the electronic tag is damaged inside the mother packaging container, and a packaging anomaly warning instruction is generated, including: Retrieve the fault tolerance fluctuation range value pre-stored in the local controller; The preset interval benchmark and the fault tolerance fluctuation range value are summed to obtain the dynamic tolerance limit threshold. When the time interval value is greater than the dynamic tolerance threshold, it is determined that a signal loss has occurred in the corresponding physical arrangement level. Based on the specific sequence number of the signal loss, the specific spatial location of the abnormal sub-packaged item within the mother packaging container can be determined in reverse. The packaging anomaly warning instruction, which contains the specific spatial location information, is pushed to the display terminal for prominent display.

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