A Site Entry Method and System Based on RFID

Abstract

This application relates to the field of logistics and warehousing automation technology, and discloses an RFID-based site entry method and system, aiming to solve the problems of low entry efficiency, high consumable costs, difficulty in retrieving and searching for packages, complex maintenance of intelligent equipment, and insufficient utilization of shelf space in existing technologies. The method includes: establishing a first mapping relationship between package tracking numbers and unique identification codes on package tags in the sorting area; placing multiple packages into package frames with attached tag cards, establishing a second mapping relationship between the package frames and each package tag card; scanning the shelf location and package frame tag cards at the delivery station using a mobile terminal to establish a third mapping relationship and trigger batch entry; and automatically unbinding the tag card when retrieving a package by having the user insert it into a recycling device. By adopting the above technical solution, this application can achieve low-cost, high-efficiency, and high-space-utilization fully automated tracking and refined management of packages throughout the entire process.

Description

Technical Field

[0001] This invention belongs to the field of logistics and warehousing automation technology, specifically relating to an RFID-based site entry method and system. Background Technology

[0002] With the booming development of e-commerce and modern logistics, last-mile delivery facilities are playing an increasingly crucial role in the logistics and distribution system. As a core component in solving the last-mile problem, the operational efficiency and information management level of express delivery stations directly affect the parcel turnover speed and the user's package pickup experience. How to achieve refined management and rapid warehousing of parcels throughout their entire logistics lifecycle through technological means has become a focus of continuous attention in the field of logistics automation.

[0003] Among these, the on-site warehousing methods and corresponding management systems are the technological foundation for ensuring the rapid flow and accurate positioning of parcels. This typically involves a series of processing steps, including parcel identification, logical binding, storage location allocation, and information exchange. Currently, the technological focus in this field is primarily on using visual identification, audio-visual guidance, and various sensor monitoring methods to achieve a logical connection between parcels and physical storage spaces. The aim is to reduce the workload of manual sorting and improve the efficiency of warehouse location management at terminal outlets through information technology.

[0004] Traditional warehousing solutions still face multiple challenges in practical applications: First, solutions relying on paper-based pickup codes require printing and affixing them one by one, resulting in low warehousing efficiency and high material costs. Customers also have to search for each package label individually, limiting the pickup experience and operational efficiency. Second, while smart shelving solutions based on active light strips or sensor arrays provide audio-visual assistance, hardware procurement and subsequent power maintenance costs are extremely high. Furthermore, fluctuations in the reliability of electronic components can lead to errors in sensor data, and the space occupied by specific hardware significantly reduces the actual space utilization of the shelving. Third, existing technologies generally suffer from a disconnect between the sorting and warehousing processes. Warehousing operations heavily rely on manual scanning of each package at the logistics station, lacking end-to-end business collaboration between the sorting area and the last-mile delivery station, making it difficult to achieve large-scale, batch processing of packages. These pain points collectively restrict further improvements in last-mile logistics efficiency. Therefore, developing a site warehousing solution that balances low cost, high efficiency, and high space utilization has become an urgent technical challenge for the industry. Summary of the Invention

[0005] The purpose of this invention is to provide a radio frequency identification (RFID)-based method and system for warehouse entry, which can effectively solve the problems mentioned in the background art. Specifically, this invention aims to address the technical bottlenecks in the existing logistics last-mile warehousing process, such as low efficiency in printing and labeling, high material costs, difficulty in retrieving and searching packages, complex maintenance of intelligent equipment, and insufficient utilization of shelf space. By introducing an RFID carrier with specific physical structure and logical attributes, efficient collaborative operation between the sorting area and the last-mile station can be achieved, realizing automated tracking and refined management of the entire package process.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A site entry method based on radio frequency identification (RFID) includes the following steps: S1, in the sorting area, acquiring the tracking number information of the package and sensing the unique identification code of the package tag, and establishing a first mapping relationship between the tracking number information of the package and the unique identification code of the package tag through a data processing center; S2, loading multiple packages with bound package tags into a package frame with a package frame tag, and synchronously reading the unique identification code of the package frame tag and the unique identification codes of all package tags therein through an RFID acquisition device, and establishing a second mapping relationship between the unique identification code of the package frame tag and the unique identification codes of all package tags; S3, ... S1. Transport the package frame containing the package to the target station and place it in a specific shelf position. Collect the spatial identification information of the shelf position and the unique identification code of the package frame label through a mobile terminal, establish a third mapping relationship between the spatial identification information and the unique identification code of the package frame label, and trigger an inbound command based on the first mapping relationship, the second mapping relationship, and the third mapping relationship; S4. In the pickup stage, match the spatial identification information of the package based on the preset pickup logic, and automatically trigger the data processing center to unbind the data and update the outbound status by sensing the removal status of the package label after the package leaves the warehouse.

[0007] Preferably, step S1 specifically includes the following steps: S11, fixing the package label card to a specific edge position on the surface of the package using a mechanical clamping component, and ensuring that the package label card is in a swingable state through a flexible connector; S12, placing the package with the fixed package label card on an integrated device with high-magnification image acquisition function and radio frequency sensing function; S13, using the high-magnification image acquisition module of the integrated device to identify the barcode on the package label to obtain the tracking number information, and simultaneously using the radio frequency sensing module of the integrated device to obtain the unique identification code of the radio frequency chip built into the package label card; S14, encapsulating the obtained tracking number information and the unique identification code into a first data packet and uploading it to the data processing center for storage in the cloud mapping database.

[0008] Preferably, step S2 specifically includes the following steps: S21, according to the classification logic of the destination station, place multiple packages that have completed the first mapping relationship binding into the package frame, and adjust the flexible connector of the package tag card so that all the package tag cards are uniformly suspended outside the side wall of the opening of the package frame; S22, push the entire package frame into the closed radio frequency identification scanning field, and use a multi-antenna array to emit electromagnetic waves in a preset frequency range to activate all the package tag cards and package frame tag cards in the scanning field; S23, the radio frequency identification acquisition device receives the carrier signal fed back by each tag, and performs category determination on the received unique identification code according to the preset starting feature string; S24, when the unique identification code matches the first preset prefix identifier, it is determined to be a package tag card, and when the unique identification code matches the second preset prefix identifier, it is determined to be a package frame tag card; S25, logically aggregate the unique identification code of one package frame tag card with the unique identification codes of multiple package tag cards to construct a hierarchical association index table and store it in the data processing center.

[0009] Preferably, step S3 specifically includes the following steps: S31, transporting the package frame carrying a batch of packages to the corresponding station and placing it on the shelf with a unique spatial code; S32, the operator uses a handheld mobile terminal to scan the barcode labels affixed to the edge of the shelf and the barcode labels affixed to the side of the package frame in sequence, extracting the spatial identification information and the unique identification code of the package frame label respectively; S33, the mobile terminal transmits the extracted information to the data processing center in real time, and the data processing center retrieves the second mapping relationship based on the received information, thereby identifying the unique identification code of all package labels contained in the package frame; S34, the data processing center further locks the corresponding package tracking number according to the first mapping relationship and automatically performs a batch warehousing action in the station management business system; S35, the data processing center performs format conversion on the unique identification code of each identified package label, extracts a character sequence of a specific length excluding the starting feature string as the pickup code, and sends a notification message containing the pickup code and the spatial identification information to the user terminal through an instant messaging protocol.

[0010] Preferably, step S4 specifically includes the following steps: S41, when the user arrives at the station and enters the pickup code, the data processing center retrieves the third mapping relationship and feeds back the corresponding spatial identification information, guiding the user to the corresponding shelf location; S42, the user identifies and retrieves the target package from the package frame based on the visual identifier printed on the package label card that matches the pickup code; S43, the user removes the package label card from the package and puts it into the label card recycling device set at the exit position; S44, the sensor array inside the label card recycling device monitors the radio frequency signal entering the recycling area in real time and identifies the unique identification code of the package label card; S45, after receiving the recycling signal sent by the label card recycling device, the data processing center automatically calls the outbound interface to complete the business outbound logic of the package tracking number, and simultaneously cancels the first mapping relationship, the second mapping relationship, and the third mapping relationship of the package in the cloud mapping database, releasing the unique identification code of the package label card for cyclic use.

[0011] Preferably, the warehousing method further includes a whole-frame relocation logical processing step: finding the remaining unclaimed source package frames and determining the target package frame; obtaining the spatial identification information of the source shelf location where the source package frame is located and the spatial identification information of the target shelf location where the target package frame is located through the relocation submodule; obtaining the unique identification code of all package tags associated with the spatial identification information of the source shelf location; updating the unique identification code of the package tags in the database in batches to the spatial identification information of the target shelf location; and moving the packages in the source package frames to the target package frames at the physical level.

[0012] Preferably, the warehousing method further includes a logical processing step for moving a single package: obtaining the unique identification code of the package label card of the package to be moved; obtaining the spatial identification information of the target shelf location where the target package frame is located; updating the spatial identification information bound to the unique identification code of the package label card to the spatial identification information of the target shelf location in the data processing center, and physically moving the package to the target package frame.

[0013] Preferably, the warehousing method further includes a logical processing step for inventory counting: collecting the spatial identification information of the shelf space to be counted via a mobile terminal; retrieving the unique identification codes of all package tags in the in-stock state under the spatial identification information from the data processing center to form a standard comparison list; obtaining the unique identification codes of all package tags actually stored on the shelf space via an RFID reader to form an actual measurement list; comparing the standard comparison list with the actual measurement list, if there is a unique identification code in the actual measurement list that is not in the standard comparison list, it is marked as a package with abnormal location; if there is a unique identification code in the standard comparison list that has not been actually measured, it is marked as a package with abnormal location.

[0014] A radio frequency identification (RFID)-based site entry system for implementing the above method includes: a cloud data caching module for persistently storing and managing the multi-level binding relationship between the unique identification code of the package label card, the package tracking number information, the unique identification code of the package frame label card, and the spatial identification information of the shelf location, and providing data retrieval and consistency verification services; and a data reading and processing module configured to coordinate the data interaction logic of multiple sensing terminals.

[0015] Preferably, the data reading and processing module further includes: a high-resolution camera and electronic tag reading submodule, installed in the sorting area, comprising a high-resolution camera and a near-field radio frequency antenna, used to simultaneously collect image data and electronic tag data in the early stage of parcel circulation and trigger the establishment of the first mapping relationship; a parcel frame reading submodule, comprising a closed radio frequency scanning tunnel and a multi-path signal processor, used to identify the second mapping relationship in the batch framing stage and filter stray signals in non-target areas through an anti-interference algorithm; a parcel frame shelving submodule, integrated into a handheld terminal device, used to establish the third mapping relationship at the station end through dual scanning logic and drive the warehousing process of the station business system; a parcel transfer submodule, used to handle the logical migration of parcels between different shelf positions or different parcel frames, and synchronize the physical location and database status in real time; a parcel outbound submodule, which is communicatively connected to the tag card recycling box set at the station exit, used to automatically complete the outbound business through the physical recycling action of sensing the tag; and an inventory counting submodule, used to periodically verify the accuracy of parcels in the warehouse through automated scanning or manual inventory counting logic.

[0016] Preferably, the system further includes the following hardware devices: a package label card, which adopts a wear-resistant encapsulation shell, embeds an ultra-high frequency radio frequency identification chip inside, and has a unique identification code containing the starting feature string and a corresponding barcode printed on the shell surface; the package label card is connected to a mechanical clamping mechanism via an adjustable-length flexible rope, the mechanical clamping mechanism being configured as a reusable spring-loaded structure; and a package frame label card, which is installed on a specific side wall of the package frame, and has an internal radio frequency chip storing a unique identification code with a specific class identifier to characterize the identity of the package frame.

[0017] Preferably, the system further includes: a parcel frame, which is a standardized-sized carrier container made of a non-metallic material with low attenuation characteristics to electromagnetic waves to ensure signal penetration of the internal parcel tag; and a shelf with multiple standardized shelf positions, each of which is affixed with a damage-resistant spatial code label.

[0018] Preferably, the high-speed card reader has a dual-mode triggering mechanism. When the high-resolution camera captures the image features of the package label, the near-field radio frequency antenna is activated simultaneously to perform carrier listening. The timestamp alignment algorithm ensures that the acquired tracking number information and the unique identification code physically belong to the same package.

[0019] Preferably, the parcel frame reader adopts a multi-antenna polling scanning system, which dynamically adjusts the transmission power and receiving sensitivity to achieve highly reliable reading of all parcel tags in a densely stacked environment.

[0020] Compared with the prior art, the present invention has the following beneficial effects: This invention constructs a full-chain digital tracking system based on radio frequency identification (RFID) technology, achieving seamless connection and efficient flow of parcels from the sorting area to the last-mile delivery station. First, this invention moves the previously cumbersome warehousing operation to the sorting area, utilizing the non-contact, multi-target rapid reading characteristics of RFID to complete the logical binding of parcels and electronic tags during the sorting process, greatly reducing the operational burden at the delivery station. Second, this invention introduces a batch processing mode for parcel frames, establishing a three-layer mapping architecture between parcels, parcel frames, and shelf positions, achieving "whole-frame transportation, whole-frame shelving, and batch warehousing," resulting in an exponential improvement in warehousing efficiency. Furthermore, the RFID tags used in this invention are characterized by low cost, no energy dependence, and high recyclability, completely eliminating the drawbacks of high consumable costs and difficult battery maintenance in traditional solutions. Finally, since parcels can be stacked within the frames without requiring separate sensing space for each parcel, the physical space utilization of the shelves is maximized. In summary, this invention significantly reduces operating costs while greatly improving the automation level and data accuracy of the last mile of logistics.

[0021] Furthermore, by establishing a primary mapping relationship using a high-speed scanning and card reading sub-module at the sorting site, it is ensured that each package possesses a unique digital identity before entering the final delivery point. This not only facilitates refined sorting at the site but also lays a data foundation for subsequent automated warehousing. Compared to item-by-item scanning at the delivery station, this pre-binding model effectively utilizes the scale of equipment at the sorting site, achieving efficient sharing of personnel and equipment.

[0022] Furthermore, the parcel frame reader submodule uses a specific prefix identifier to classify the parcel label card and the parcel frame label card. This logical automatic classification mechanism avoids the risk of errors caused by manual data entry. Combined with a flexible connector that allows the labels to hang uniformly outside the frame, this not only facilitates electromagnetic induction within the scanning area but also provides intuitive visual guidance for users to retrieve their packages, achieving an organic unity between technical logic and user experience.

[0023] Furthermore, this invention employs a dual-mode identification mechanism combining barcodes and RFID, simultaneously configuring an electronic chip and a visual barcode on the label. In sorting areas and batch packing processes, the rapid reading advantage of RFID improves efficiency; in stages requiring precise positioning, such as shelf placement and warehouse relocation, the anti-interference characteristics of barcode scanning ensure data accuracy. This dual-mode fusion ensures the system's high robustness in various complex environments.

[0024] Furthermore, the automated outbound logic is triggered by sensing the recycling of package tags, transforming the user's physical pickup behavior into a system data stream update, achieving "pick-up and outbound." This not only eliminates the manual scanning process for outbound operations and shortens the user's stay at the station, but also achieves closed-loop recycling of tags through the recycling mechanism, further reducing consumable input.

[0025] Furthermore, by establishing multi-level mapping relationships in the cloud data caching module, the system can achieve precise inventory counting and transfer management. Whether it is a whole-frame transfer or a single package transfer, only simple logical unbinding and rebinding are required, without the need to relabel or physically modify the packages, greatly improving the flexibility and granularity of warehouse management.

[0026] Furthermore, the special physical structure of the package label, including a mechanical clamping mechanism and flexible ropes, ensures that it can adapt to packages of different sizes and materials. The optimized rope length design ensures that the label remains visible even when stacked, allowing users to visually match the package based on the pickup code. This provides an excellent package pickup navigation experience without relying on expensive audio-visual guidance equipment.

[0027] Furthermore, the system employs a globally unique coding design for shelf location IDs and associates them with geographical location information. This enables the data processing center to monitor asset distribution across network points, and through real-time marking of abnormal packages, it significantly reduces the loss and misdelivery rates of packages at the last mile, strengthening the security control capabilities at the logistics end.

[0028] Furthermore, by designing the pickup code as a specific character sequence after removing the initial feature string and keeping it consistent with the visual printing content on the label surface, this invention minimizes the cognitive burden on users while ensuring the rigor of the internal logic of the system, achieving a perfect combination of complex underlying technology and simple surface operation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall technical solution architecture of an RFID-based site entry method proposed in this invention. Figure 2 This is a schematic diagram illustrating the core principle framework of the multi-level mapping relationship between packages, package frames, and shelf positions in this invention; Figure 3 This is a flowchart illustrating the main stages of the process in this invention that link parcel binding and batch framing at the sorting site. Figure 4 This is a schematic diagram of the multi-level interaction relationship and data flow between the sorting center, data processing center and end-point station in this invention; Figure 5 This is a flowchart of the automatic outbound logic based on tag recycling in this invention. Detailed Implementation

[0030] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0031] Example 1 In the current last-mile delivery system, the efficiency of parcel warehousing and retrieval is the core bottleneck restricting the operational efficiency of delivery stations. This embodiment provides a site warehousing method based on radio frequency identification (RFID), aiming to achieve refined control over the entire parcel circulation process by bringing the digital binding process forward and introducing it into reusable physical carriers.

[0032] Step 1: In the initial processing stage at the sorting site, the first step is to digitally define the identity of each package entering the system. Operators or automated robotic arms acquire the tracking number of the package to be processed; this number is typically carried on a paper label on the package. Simultaneously, the unique identification code on the package's tag is sensed. The core of this process lies in establishing a logical mapping between the package's tracking number and the unique identification code on the package's tag through a data processing center. At the physical execution level, the specific implementation path of Step 1 is as follows: First, step S11 is executed, where a specially designed mechanical clamping component secures the package label to a specific edge position on the package surface. To ensure that label reading is not affected during subsequent stacking, handling, and automated conveying, the package label must be able to swing freely via a flexible connector. This flexible connector is made of highly resilient polyamide fiber and is 10 to 15 centimeters in length, allowing the label to hang naturally or swing into gaps when stacked within the package frame, thus avoiding electromagnetic shielding dead zones. The mechanical clamping component is internally equipped with a high-strength spring compression structure. The spring pressure is preset to withstand different surfaces such as paper boxes and plastic courier bags, ensuring that the label will not fall off under severe vibration and can be easily unloaded manually or mechanically during recycling.

[0033] Then, step S12 is executed, placing the package with the attached tag onto an integrated device equipped with high-magnification image acquisition and radio frequency sensing capabilities. This integrated device is the high-speed scanner. The high-speed scanner is placed at key nodes of the sorting line or on a manual operating table, and it integrates a high-definition camera with no less than 20 million pixels and a near-field radio frequency antenna with directional beam characteristics.

[0034] In step S13, the barcode on the package label is scanned by the high-magnification image acquisition module of the integrated device. This module uses a preset image recognition algorithm to denoise, enhance, and binarize the acquired image, locate the barcode area, and extract its globally unique tracking number. Simultaneously, the radio frequency sensing module of the integrated device emits an electromagnetic activation signal of a specific frequency into space, activating the ultra-high frequency radio frequency chip built into the package label. After sensing the electromagnetic field energy, the chip uses backscatter modulation technology to feed back its internally stored hexadecimal unique identification code.

[0035] In step S14, the data processing center receives the aforementioned tracking number and unique identification code. To ensure the atomicity and accuracy of data transmission, the system encapsulates these two elements into a first data packet. This data packet contains a timestamp, device number, package tracking number, and RFID code. After receiving the data packet, the data processing center creates a new associated record in the cloud mapping database, using the tracking number as the primary key or index key and the identification code as the associated attribute, thus completing the storage of the first mapping relationship. This mapping relationship serves as a unique digital credential for the package during its subsequent circulation.

[0036] Step Two: After the initial binding of the packages is completed, the batch loading stage begins. Following the destination station's classification logic, step S21 is executed to load multiple packages with bound parcel tags into parcel frames equipped with parcel frame tags. During the loading process, the operator needs to adjust the flexible connectors of the parcel tags to ensure that all parcel tags are uniformly suspended outside the opening sidewall of the parcel frame. This physical layout optimization significantly reduces electromagnetic wave penetration loss in the densely packed parcel layers, ensuring reliable reading.

[0037] In step S22, the entire package frame is pushed into a closed RFID scanning field. This scanning field is made of shielding material and contains an array of four or more directional antennas. The RFID acquisition device controls the multi-antenna array to emit electromagnetic waves using frequency hopping technology within a preset frequency range of 860 MHz to 960 MHz, forming an activation field with no blind spots, covering all tags within the package frame.

[0038] In step S23, the RFID acquisition device receives carrier signals from each tag. Since there are numerous parcel tags and a fixed parcel frame tag present in the scanning area simultaneously, the system needs to classify the received jumbled unique identifiers. The classification logic is based on a preset starting feature string.

[0039] In step S24, when the first four characters of the unique identifier match the first preset prefix identifier (e.g., the character sequence is 3333), the system logic determines that the label is a parcel label; when the first four characters of the unique identifier match the second preset prefix identifier (e.g., the character sequence is 4444), the system determines that it is a parcel frame label. This automatic identification mechanism based on encoding rules eliminates the possibility of misjudgment caused by manual input.

[0040] In step S25, the data processing center performs a logical aggregation operation. It uses the unique identifier of the package tag as the parent node and the identifiers of multiple simultaneously read package tags as child nodes, constructing a hierarchical association index table. This is the second mapping relationship. This relationship table clearly defines "which packages are in which boxes," providing data support for the overall box transportation and warehousing.

[0041] Step 3: Transportation and Warehousing Triggering Phase. The parcel crates loaded with packages are transported to the target station. Step S31 is executed, where the operator places the parcel crates on shelf locations with unique spatial codes. The shelf locations are affixed with wear-resistant spatial identification codes.

[0042] In step S32, the operator uses a handheld mobile terminal to sequentially collect the spatial identification information of the shelf location and the unique identification code of the package frame label. This process typically uses infrared scanning or image recognition technology to read the barcodes on the shelves and frames.

[0043] In step S33, the mobile terminal transmits the extracted spatial identifier and frame identification code to the data processing center in real time via a wireless local area network or cellular network. The data processing center immediately retrieves the second mapping relationship in the database based on the package frame identification code, thereby instantly identifying the unique identification code of all package tags physically carried within the package frame.

[0044] In step S34, the data processing center further traces back the first mapping relationship to identify all package tracking numbers associated with these tags. Subsequently, the system automatically calls the interface of the station management business system to execute batch inbound instructions. This means that operators only need to scan the codes twice to complete the inbound operation of dozens of packages in a single frame, significantly improving efficiency.

[0045] In step S35, the system automatically generates a pickup code for each package. The generation logic involves converting the unique identifier on the package label, specifically by removing the initial characteristic string (i.e., the prefix identifier) ​​and extracting the remaining character sequence of a specific length (such as the last six digits) as the pickup code. The system then pushes a notification message containing the pickup code, the delivery station name, and the shelf space identifier to the recipient's terminal device via an instant messaging protocol.

[0046] Step 4: Package Pickup and Automated Outbound Processing. During the pickup phase, step S41 is executed. When the recipient arrives at the station and enters the pickup code, the data processing center retrieves the third mapping relationship and provides the corresponding spatial identification information (e.g., shelf number 03 in area A) to guide the recipient to accurately locate the package.

[0047] In step S42, the recipient arrives at the designated shelf location and observes the label hanging outside the package frame. The label has a large number printed on it, which exactly matches the pickup code. The recipient then retrieves the target package directly from the frame based on the visual identifier.

[0048] In step S43, the recipient removes the package tag from the package and places it into the tag recycling device located at the exit of the station. This is a crucial closed-loop step.

[0049] In step S44, the sensor array inside the tag recycling device is always in carrier listening mode, monitoring the radio frequency signals entering the recycling area in real time. Once the unique identification code of the packaged tag is identified, a recycling signal is immediately sent to the data processing center.

[0050] In step S45, after receiving the signal, the data processing center automatically calls the outbound interface of the business system to update the status of the corresponding package tracking number to "signed". Simultaneously, the system cancels the first, second, and third mapping relationships corresponding to the package in the cloud mapping database. This cancellation operation releases the occupancy status of the unique identification code, allowing the tag to be returned to the sorting area for reuse after simple physical disinfection.

[0051] Example 2 This embodiment, based on Embodiment 1, provides an alternative technical implementation path for highly automated sorting environments. In large sorting centers, the binding of package tracking numbers and tags (Step 1) often needs to be completed on a high-speed conveyor line.

[0052] In Example 2, the operation in Step 1 no longer relies on manual handheld devices, but is instead achieved through an automated identification unit integrated into the package feeding platform. Before entering the main sorting line, the package passes through a sensing zone equipped with an industrial-grade fixed scanner and a high-gain radio frequency antenna. The industrial-grade scanner has a high-speed shutter and an image preprocessing chip, enabling it to accurately capture the barcode on the waybill when the package moves at a speed of 2 to 3 meters per second.

[0053] Meanwhile, to address radio interference caused by dense parcel flows, the RF sensing module in this embodiment employs a multi-timeslot dynamic allocation algorithm. The system divides the reading period into multiple microsecond-level time slices, activating the tag chips within the sensing field through polling. When the system detects fluctuations in the image feature signal of the parcel label, it simultaneously records the unique identification code with the strongest signal strength received by the RF antenna at that moment.

[0054] To ensure accurate binding, the system incorporates timestamp alignment logic. By calculating the difference between the image capture time and the RF signal feedback time, it determines whether the difference falls within a preset physical offset threshold. If the displacement distance corresponding to the time difference is less than the minimum spacing of the packages, they are considered to be physically the same entity. This fully automated binding mode significantly improves the site's processing throughput.

[0055] In the data upload phase, Example 2 employs an edge computing strategy. The high-speed card reader submodule performs initial data verification and conflict filtering locally, eliminating invalid interference signals caused by multipath reflections. Only high-quality first-map data that passes verification is uploaded to the cloud data cache module. This approach reduces the concurrent load on the central server and enhances the system's robustness in environments with network fluctuations.

[0056] Example 3 This embodiment focuses on describing the dynamic management of in-stock parcels, including whole-frame relocation, single-parcel relocation, and automated inventory logic. These functions support the maximum utilization of the internal space of the station.

[0057] During the operation of the parcel station, it is often necessary to optimize and adjust the shelf space based on inventory turnover. For example, when most of the parcels in a parcel box have been taken and only a few remain, a whole box needs to be moved to make room on the shelf.

[0058] The logical processing steps for a complete shelf relocation are as follows: First, using the relocation submodule on a mobile terminal, the operator scans the spatial identifier of the source shelf location where the source package box is located. The system immediately retrieves a list of unique identification codes for all currently associated package tags under that spatial identifier from the cloud. Next, the operator scans the spatial identifier of the target shelf location. At this point, the data processing center executes a batch update command in the database. This operation does not require repeated scanning of each package; instead, it achieves a collective migration at the logical level by changing the mapping between spatial identifiers and tag identification codes in the database. Finally, the operator physically moves the entire package to the target location.

[0059] For the relocation of a single package, the logic is more detailed. First, the unique identifier of the package tag to be relocated is obtained. Then, the spatial identifier of the target location is obtained. The data processing center updates the spatial identifier field bound to that specific identifier to the new target value.

[0060] Regarding inventory counting, this embodiment provides a highly efficient verification mechanism based on radio frequency identification (RFID). Traditional inventory counting requires checking each item against the order slip, while this invention automates the comparison through an inventory counting sub-module. First, operators collect the spatial identification information of the shelf locations to be counted using a mobile terminal. Based on this identification, the system retrieves a standard comparison list of in-stock items from the cloud, which contains the identification codes of all packages that should be located at that location as recorded by the system.

[0061] Subsequently, operators use handheld or fixed RFID readers to sense and collect data from all packages on the shelf, generating an actual measurement list. The comparison logic is executed automatically by the system: if some identification codes appearing in the actual measurement list are not registered in the standard comparison list, the system marks them as packages with abnormal locations and prompts the operator to check if they have been placed in the wrong location; conversely, if a certain identification code in the standard list is not sensed during the actual measurement, it is marked as a lost package, triggering the search logic. Because RFID can penetrate package frames and packaging materials, the inventory process does not require disassembling frames or rummaging through packages, greatly reducing labor costs.

[0062] Example 4 This embodiment provides an in-depth description of the hardware system and its physical characteristics involved in the present invention, so as to demonstrate its application advantages in a practical engineering environment.

[0063] A radio frequency identification (RFID)-based site entry system, the core hardware of which includes parcel label cards, parcel frame label cards, parcel frames, shelves, and various reading and writing terminals.

[0064] The package label card is designed with the harshness of the logistics environment in mind. Its outer shell is encapsulated in highly abrasion-resistant reinforced polypropylene to prevent damage to the internal circuitry during friction on the sorting line. An ultra-high frequency radio frequency identification (RFID) chip is embedded inside, conforming to mainstream international electronic product code standards. The card surface not only displays a clearly visible pickup code (with prefix characters removed) but also a corresponding two-dimensional barcode. This allows for backup scanning via optical scanning even in cases of extreme radio frequency signal interference (such as when the package contains a large amount of metal or liquid).

[0065] The mechanical clamping mechanism for the packaging labels is a testament to its physical innovation. It employs a spring-loaded structure with an opening travel designed to accommodate thicknesses ranging from 0.5 mm for plastic bags to 15 mm for heavy-duty corrugated cardboard. The flexible rope is made of a tensile-resistant material, ensuring it won't break during frequent loading.

[0066] The parcel frame adopts a standardized size design and is made of polyethylene or non-metallic composite materials with low attenuation characteristics for electromagnetic waves. During the design process, the relative permittivity of the material was optimized to ensure that refraction loss and energy attenuation are suppressed within a preset range when electromagnetic waves pass through the frame's side walls and enter the internal space. The parcel frame's side walls have dedicated slots for installing parcel frame labels. The chip in the parcel frame label stores an identification code starting with 4444, representing the frame's identity.

[0067] Each shelf location is affixed with a spatially coded label. These labels use a metal-resistant material with strong adhesive backing, ensuring that barcodes or electronic tags affixed to them can be reliably collected by handheld terminals, even if the shelf frame is metal.

[0068] The system's data processing center consists of a cluster of multiple high-performance servers running a cloud-based data caching module. This module employs in-memory database technology, using a hash index structure to achieve millisecond-level retrieval of millions of mapping relationships. The data reading and processing module coordinates the front-end sensing terminals. The package frame card reader submodule includes a closed RF scanning tunnel, the inner walls of which are lined with absorbing material to prevent electromagnetic wave leakage and interference with surrounding equipment. A multipath signal processor analyzes the received signal strength and phase information, using spatial positioning algorithms to filter out non-target tag signals from outside the tunnel.

[0069] The package outbound submodule establishes a communication connection with the tag card recycling bin located at the exit of the station. The antenna inside the recycling bin adopts a circular polarization design. This design ensures that no matter what angle the tag card is placed in the bin, the antenna inside can achieve effective inductive coupling with the magnetic field of the recycling bin, thereby guaranteeing zero missed detection of the outbound signal.

[0070] This system transforms complex physical processes into clear data flow operations. By establishing multi-level linkages between order numbers, labels, parcel frames, and shelf locations, this invention eliminates the reliance on paper consumables in traditional warehousing methods. Each physical action (framing, moving, and placing) corresponds to an update instruction in the database.

[0071] In terms of package pickup guidance, this system does not rely on expensive active lighting equipment, but instead utilizes the long cords and external attachment features of the package label cards. This design allows recipients to simply visually match a row of labels on the side of the package frame after arriving at the designated shelf location. This "physical indexing" is far more efficient than traditional waybills searching and requires no energy maintenance, aligning with the development trend of green logistics.

[0072] Any logical decisions involved in this invention are implemented through a purely technical sequence of instructions. For example, when generating a pickup code through format conversion, the system performs an offset operation on the character array stored in memory. Starting from the initial address, it skips the four fixed-length characters representing the category, copies the subsequent character sequence to a new data storage unit, and defines it as the pickup code field. This process completely eliminates any subjective human intervention, ensuring the objectivity and consistency of logistics data.

[0073] Example 5 This embodiment describes an alternative logic for handling abnormal outbound shipments at the station, namely, package retrieval and outbound via barcode scanning. Although tag recycling triggering is the preferred solution of this invention, in certain special cases (such as damaged tags or user non-compliance with procedures), the system needs to have compatibility capabilities.

[0074] When a customer picks up their package at the station, if they don't deposit the tag card into the recycling bin and instead take the package directly to the outbound counter, the package outbound submodule first obtains the tracking number from the barcode scanned by the outbound scanner. At this point, the data processing center uses this tracking number to perform a reverse lookup of the first mapping relationship to find the corresponding unique identification code on the package tag card.

[0075] The system then automatically executes the outbound logic: first, it completes the order settlement operation for this order number in the business system; second, it remotely marks the tag's identification code as pending recycling via instruction and sends an alarm to prompt the operator to manually retrieve the tag. This barcode scanning outbound mode serves as a redundant backup for the recycling trigger mode, ensuring that the station's operations are never interrupted under any circumstances.

[0076] Furthermore, the system's security control logic is also reflected in the management of shelf location IDs. Because shelf location IDs are designed to be globally unique and strongly correlated with geographical location information (such as latitude and longitude coordinates and station names), when the data processing center detects that a package tag is stuck in an unexpected station or shelf location, it will immediately trigger a location anomaly warning. This function effectively prevents packages from being misdelivered during cross-network point transportation.

[0077] In summary, this invention achieves seamless package tracking from the sorting site to the final delivery station by constructing a full-chain digital tracking system based on radio frequency identification (RFID) technology. By pre-processing the complex logic in the advanced sorting center, the warehousing operations at the delivery station are greatly simplified. The three-layer mapping architecture of packages, package frames, and shelf positions not only improves warehousing efficiency but also enables refined inventory management. The low-cost, energy-free tag card recycling mechanism not only reduces operating costs but also significantly improves the user's package pickup experience and the delivery station's turnover capacity through fully automated processing.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A site entry method based on radio frequency identification, characterized in that, Includes the following steps: S1. In the sorting area, a mechanical clamping assembly fixes the package label card to the edge of the package surface, and the package label card is in a swingable state through a flexible connector; a high-speed scanning card reader integrated into the sorting line acquires the package label image and senses the unique identification code of the package label card; the high-speed scanning card reader performs noise reduction and binarization processing on the label image, extracts the package tracking number information, and establishes a first mapping relationship between the tracking number information and the unique identification code through a data processing center; the tracking number information, the unique identification code, and the device timestamp are encapsulated into a first data packet and stored in a cloud mapping database. S2. According to the classification logic of the destination station, load multiple packages with bound parcel tags into a parcel frame with parcel frame tags, and adjust the flexible connector so that all the parcel tags are suspended outside the opening side wall of the parcel frame; push the entire parcel frame into a closed radio frequency identification scanning field, and use a multi-antenna array to simultaneously read the unique identification code of the parcel frame tag and the unique identification code of all the parcel tags; determine the category of the received unique identification code according to the preset start feature string, and establish a second mapping relationship between the unique identification code of the parcel frame tag and the unique identification code of all the parcel tags; S3. Transport the parcel frame loaded with parcels to the target station and place it in a specific shelf location; use a mobile terminal to collect the spatial identification information of the shelf location and the unique identification code of the parcel frame label; the data processing center retrieves the second mapping relationship based on the unique identification code of the parcel frame label to identify the unique identification code of all parcel labels physically carried in the parcel frame, and locks the corresponding tracking number information based on the first mapping relationship, establishes a third mapping relationship between the spatial identification information and the unique identification code of the parcel frame label, and performs the batch warehousing operation of the parcels in the station management business system based on the first mapping relationship, the second mapping relationship and the third mapping relationship; S4. During the pickup stage, the space identification information of the package is matched based on the preset pickup logic, and the user is guided to the corresponding shelf position. The pickup code is converted from the unique identification code of the package label card by extracting a character sequence of a specific length after removing the initial feature string. After the package leaves the warehouse, the physical removal status of the package label card is sensed by the label card recycling device set at the exit position, triggering the data processing center to cancel the corresponding first mapping relationship, second mapping relationship and third mapping relationship, and release the unique identification code of the package label card for cyclic use.

2. The site entry method based on radio frequency identification according to claim 1, characterized in that, Step S1 specifically includes the following steps: The package label card is fixed to the surface of the paper packaging box or plastic express bag by the spring clamping structure of the mechanical clamping assembly; The package with the attached package tag is placed on a high-resolution image acquisition and radio frequency sensing card reader. The high-resolution image acquisition module of the high-speed card reader identifies the barcode on the package label to obtain the tracking number information. At the same time, the radio frequency sensing module of the high-speed card reader emits an electromagnetic activation signal into space to activate the radio frequency chip built into the package label and receives the unique identification code fed back by the radio frequency chip through backscatter modulation technology. The timestamp alignment algorithm is used to determine whether the acquisition time of the order number information and the sensing time of the unique identification code are within a preset physical offset threshold range; When the data is determined to be the same physical entity, the high-speed card reader performs data verification and conflict filtering locally, eliminates interference signals caused by multipath reflection, and uploads the verified data to the data processing center.

3. The site entry method based on radio frequency identification according to claim 1, characterized in that, Step S2 specifically includes the following steps: The enclosed radio frequency identification scanning field is made of shielding material and has an array of multiple directional antennas arranged inside it; The radio frequency identification acquisition device controls the multi-antenna array to transmit electromagnetic waves using frequency hopping technology within a preset frequency range, forming an activation field that covers the internal space of the enclosure frame; The radio frequency identification acquisition device receives the carrier signals fed back by each tag and makes logical judgments based on the character sequence characteristics; When the unique identification code matches the first preset prefix identifier, it is determined to be a package label card; When the unique identification code matches the second preset prefix identifier, it is determined to be a package frame label card; The data processing center uses the unique identification code of a package tag as the parent node and the unique identification codes of multiple package tags read simultaneously as child nodes to construct a hierarchical association index table.

4. The site entry method based on radio frequency identification according to claim 1, characterized in that, Step S3 specifically includes the following steps: Operators use handheld mobile terminals to scan the barcode labels affixed to the edge of the shelf and the barcode labels affixed to the side of the package frame in sequence, and extract the spatial identification information and the unique identification code of the package frame label card respectively. The mobile terminal transmits the extracted information to the data processing center in real time via a wireless communication protocol. The data processing center performs format conversion on the unique identification code of the package label, removes the initial feature string, and defines the remaining character sequence of a specific length as the pickup code field. The data processing center sends a notification message containing the pickup code, the spatial identification information, and the name of the target station to the user terminal via an instant messaging protocol. The surface of the package label card is printed with a visual identifier that is consistent with the content of the pickup code.

5. The site entry method based on radio frequency identification according to claim 1, characterized in that, Step S4 specifically includes the following steps: When the user enters the pickup code, the data processing center retrieves the third mapping relationship and returns the corresponding spatial identification information; The user takes the target package from the package frame according to the visual identifier printed on the package label card, and puts the package label card into the label card recycling device after removing the package label card from the package; The sensor array inside the tag card recycling device monitors the radio frequency signals entering the recycling area in real time through a circularly polarized antenna and identifies the unique identification code of the packaged tag card. After receiving the recycling signal, the data processing center automatically calls the outbound interface of the station management business system to complete the outbound business logic and simultaneously deletes the associated records in the cloud mapping database.

6. The site entry method based on radio frequency identification according to claim 1, characterized in that, The process of executing the inbound method also includes a logical processing step of transferring the entire database: The spatial identification information of the source shelf location where the source package box is located, and the spatial identification information of the target shelf location where the target package box is located are obtained through the warehouse transfer sub-module of the mobile terminal. Retrieve a list of unique identification codes for all package labels associated with the spatial identification information of the source shelf location from the cloud mapping database; The data processing center executes a batch update command to batch modify the association of the unique identification code list in the database to the spatial identification information of the target shelf location, so as to achieve a collective migration at the logical level. Move the entire package within the source package frame at the physical level to the target package frame.

7. The site entry method based on radio frequency identification according to claim 1, characterized in that, The warehousing method also includes a logical processing step of inventory counting during its execution. The spatial identification information of the shelf locations to be inventoried is collected via mobile terminal; The unique identification codes of all package tags that are in the inventory status under the spatial identification information are retrieved from the data processing center to generate a standard comparison list; The actual measurement list is generated by using an RFID reader to collect data on all packages actually stored on the shelf. The actual measurement list is automatically compared with the standard comparison list; If the actual measurement list contains a unique identification code that is not in the standard comparison list, it will be marked as an abnormal location package on the system interface; If a unique identifier is found in the standard comparison list that has not been actually measured, it will be marked as a lost or abnormal package on the system interface.

8. A site entry system based on radio frequency identification, characterized in that, include: The cloud-based data caching module is used to persistently store and manage the multi-level binding relationships between the unique identification code of the package label card, the package tracking number information, the unique identification code of the package frame label card, and the spatial identification information of the shelf location. The cloud-based data caching module realizes data retrieval through in-memory database technology and hash index structure. The data reading and processing module is configured to coordinate the data interaction logic of multiple sensing terminals. The data reading and processing module includes a high-speed card reading submodule, a parcel frame card reading submodule, a parcel frame shelving submodule, a parcel transfer submodule, a parcel outbound submodule, and an inventory counting submodule. The package label uses an enhanced polypropylene encapsulation shell with an embedded ultra-high frequency radio frequency identification chip. The shell surface is printed with a unique identification code containing a starting characteristic string and a corresponding visual identifier. The package label is connected to a mechanical clamping mechanism via a flexible rope of a set length. The mechanical clamping mechanism includes a spring-loaded clamping structure with a preset pressure value. Package frame label card, which is installed in a slot on the side wall of the package frame, stores a unique identification code with class identifier inside; The packaging frame is a standardized container made of a non-metallic composite material that has low attenuation characteristics for electromagnetic waves. The shelving unit has multiple shelf positions, each of which is affixed with a spatially coded label made of a metal interference-resistant material.

9. A site entry system based on radio frequency identification according to claim 8, characterized in that, The high-resolution camera and electronic tag reading submodule is installed in the sorting area and includes a high-resolution camera and a directional beam near-field radio frequency antenna. It is used to simultaneously collect image data and electronic tag data in the early stage of package circulation and trigger the establishment of the first mapping relationship. The high-resolution camera card reader submodule has a dual-mode triggering mechanism. When the high-resolution camera captures the image features of the package label, it simultaneously activates the directional beam near-field radio frequency antenna to listen to the carrier wave and uses a timestamp alignment algorithm to ensure that the acquired tracking number information and the unique identification code belong to the same physical entity.

10. A site entry system based on radio frequency identification according to claim 8, characterized in that, The package frame card reader submodule includes a closed radio frequency scanning tunnel and a multi-path signal processor, and the inner wall of the closed radio frequency scanning tunnel is covered with a wave-absorbing material. The package frame card reader submodule adopts a multi-antenna polling scanning system. By dynamically adjusting the transmission power and receiving sensitivity, it analyzes the received signal strength and phase information in a closed environment and uses a spatial positioning algorithm to filter out non-target tag signals outside the tunnel in order to identify the second mapping relationship. The package outbound submodule is communicatively connected to the tag card recycling device located at the exit of the station. The induction antenna inside the tag card recycling device adopts a circular polarization design, which is used to automatically trigger the business outbound logic by sensing the physical recycling action of the tag card.

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