Public asset management method and system based on RFID tags

Abstract

The application discloses a public asset management method and system based on RFID tags, relates to the technical field of asset management, and realizes orderly scheduling and precise control of multi-asset operation by formulating clear operation sequences and trigger positions for public assets in a preset area, ensures that the operation of the current target asset is started only after all key preceding tasks are completed through a double-state verification mechanism of distinguishing global preceding assets and adjacent preceding assets, effectively avoids operation conflicts and process breaks, simultaneously, through real-time interaction state notification of the communication link between operation devices, a chain collaborative operation process based on a preset sequence is constructed, each asset operation strictly follows a logical sequence to be executed in turn, the standardization, process rigor and overall execution efficiency of public asset management are significantly improved, resource waste and management cost are reduced, and the core needs of modern public asset management for efficient collaboration, precise control and orderly execution are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asset management, in particular to a public asset management method and system based on RFID tags. BACKGROUND

[0002] Public assets refer to tangible or intangible resources owned, managed and served for the public by governments, institutions or public institutions, such as municipal facilities (street lamps, roads), office equipment (computers, furniture), vehicles (buses, ambulances), etc. Such assets are usually large in number and widely distributed;

[0003] The management system is an innovative solution combining RFID technology with public asset management needs. RFID tags achieve non-contact and high-efficiency data collection through wireless radio frequency signals, solving the slow identification and error-prone problems of traditional barcodes in large-scale public asset management. Public assets, as the basis of government and social services, require precise and real-time management due to their dispersion, high value and dynamic use characteristics. The asset management system integrates RFID technology to build a digital management platform for the whole life cycle of assets from warehousing to retirement.

[0004] The prior art has the following disadvantages:

[0005] 1. The public asset management system usually lacks strict control mechanisms for the operation sequence when handling multiple asset collaborative operations, especially without developing an orderly execution sequence for the logical association between assets (such as spatial sharing locations, use cycle collaboration or state interlocking changes), leading to disordered conflicts or resource allocation confusion in asset operations;

[0006] 2. Most existing solutions rely only on the state trigger of a single asset, without establishing an operation completion state verification mechanism for the preceding assets (especially global and directly adjacent preceding assets), so the operation device may start execution when the key preceding tasks are not completed, causing operation logic breakage, device call conflicts or management process interruption;

[0007] 3. Traditional systems do not realize real-time collaborative interaction of multiple asset operation states through communication links, and cannot ensure that each asset operation device coordinates actions based on a unified global sorting logic, especially in multiple asset intensive operation scenarios, which may cause asset state misjudgment, low management efficiency and waste of human and material resources due to operation timing disorder, making it difficult to meet the comprehensive needs of operation standardization, process rigor and execution efficiency in modern public asset management.

[0008] Therefore, the present application proposes a public asset management method and system based on RFID tags, which realizes the order, precision and efficiency of public asset management through sorting planning, double preceding verification and chain collaboration mechanism, significantly improving the management quality and execution reliability. SUMMARY

[0009] The present application aims to provide a public asset management method and system based on RFID tags to solve the problems in the background art.

[0010] To achieve the above-mentioned purpose, the present application provides the following technical solution: a public asset management method based on RFID tags, the management method comprising the following steps:

[0011] A1: According to the importance, urgency and spatial correlation of the assets, an operation sequence and trigger position are formulated for the public assets with RFID tags in the preset area, and the RFID reader or operation device deployed at the initialization is on standby;

[0012] A2: Select the asset with the highest priority in the sequence as the first target asset, control the RFID operation device bound to it to move to the corresponding first preset position, and establish a communication link with other assets to be operated before starting;

[0013] A3: After the first target asset arrives, receive the second notification message containing the RFID identification and position state sent by the operation device of other assets, and distinguish the global precedent assets and adjacent precedent assets according to the sequence logic;

[0014] A4: If the state notification of the global precedent assets is not received or any global precedent asset has not actually arrived, the arrival is not confirmed, and if the notification of the adjacent precedent assets is not received or the adjacent precedent assets have not arrived, the arrival is also not confirmed;

[0015] A5: Only when the state notification of the global precedent assets is received and verified to have arrived, and the notification of the adjacent precedent assets and the arrival meet the requirements, the arrival is confirmed and the tag reading and writing operations are performed, the notification containing the identification and confirmation state of the asset itself is sent synchronously, the condition judgment of the subsequent assets is triggered, and the sequence chain collaborative management is formed.

[0016] In a preferred embodiment, step A3: after the first target asset arrives, receive the second notification message containing the RFID identification and position state sent by the operation device of other assets, and distinguish the global precedent assets and adjacent precedent assets according to the sequence logic, comprising the following steps:

[0017] Receive the second notification message sent by the operation device of other target assets through the RFID reader carried by the operation device;

[0018] Determine whether the other assets before the first target asset have arrived at the corresponding preset position based on the preset sequence logic;

[0019] Extract all asset sets with a sequence number smaller than the first target asset, and perform message receiving verification and physical position verification on each asset;

[0020] The adjacent pre-asset G n-1 , message integrity verification and physical consistency verification are performed.

[0021] The operation device performs state determination through a double-branch tree structure logic. If the verification of any branch fails, a cooperative waiting mechanism is triggered.

[0022] After the global pre-asset and the adjacent pre-asset pass the verification, it is confirmed that the first target asset has the subsequent operation condition.

[0023] In a preferred embodiment, the second notification message adopts a TLV encoding structure, the length is ≤ 256 bytes, and it contains an asset unique identifier, a state code, a location verification hash value, a timestamp, and an operation device health state bit.

[0024] In a preferred embodiment, the operation device performs state determination through a double-branch tree structure logic, including the following steps:

[0025] Branch one: whether the global pre-asset set G passes the message and physical verification;

[0026] Branch two: whether the adjacent pre-asset G n-1 passes the message and physical verification alone.

[0027] In a preferred embodiment, step A4: when the global pre-asset state notification is not received or any global pre-asset has not actually arrived, the arrival is not confirmed. When the adjacent pre-asset notification is not received or the adjacent pre-asset notification has not arrived, the arrival is also not confirmed, including the following steps:

[0028] The operation is subjected to cooperative condition verification, and the condition verification includes global pre-condition verification and adjacent pre-condition verification.

[0029] When both branches pass the verification, the RFID operation device of the first target asset is allowed to confirm that it has arrived at the first preset position. Otherwise, it continues to remain in a waiting state and periodically retries.

[0030] In a preferred embodiment, the global pre-condition verification processing logic is: for the global pre-asset set with a sorting sequence number smaller than that of the first target asset, it is checked through a message completeness detection function whether the second notification message of each asset is received completely, and through a physical arrival verification function, the Euclidean distance between the RFID tag coordinates and the preset position coordinates is calculated, and the tag signal strength is checked. If any asset message is missing or the position deviation exceeds the threshold value, an operation inhibition instruction is triggered, and the RFID operation device of the first target asset enters a waiting state.

[0031] The adjacent pre-condition verification processing logic is: for the adjacent pre-asset Gn-1 Check if there is a unique second notification message of the adjacent predecessor asset in the cache area, and verify the Euclidean distance and signal strength between the real-time location of the adjacent predecessor asset RFID tag and the preset location; if any condition is not met, trigger the operation inhibition instruction to make the RFID operation device of the first target asset remain in the waiting state.

[0032] In a preferred embodiment, step A5: only when the global predecessor asset state notification is received and verified to be arrived, and the adjacent predecessor asset notification and arrival are both satisfied, the arrival is confirmed and the tag reading and writing operations are performed, the notification containing the identification and confirmation status of itself is sent synchronously, the subsequent asset condition judgment is triggered, and the sorting chain collaborative management is formed, including the following steps:

[0033] In the case where the global predecessor condition and the adjacent predecessor condition are both satisfied, the microprocessor of the operation device issues an operation permission instruction to perform the preset task operation of the first target asset;

[0034] After the operation is completed, the operation device broadcasts the first notification message to other target asset operation devices in the area;

[0035] After receiving the message, the other assets update the local global predecessor state list and re-execute the predecessor verification logic to form a chain collaborative operation process.

[0036] In a preferred embodiment, the preset task operation of the first target asset includes:

[0037] Reading operation: reading the information stored in the tag by the reader;

[0038] Write operation: update asset state code, record operation timestamp, write operation device ID or personnel information;

[0039] Extended task: collect sensor data and perform device function self-check operation;

[0040] The first notification message adopts TLV encoding structure, including asset unique identifier, operation completion status code, sorting sequence number N and timestamp.

[0041] In a preferred embodiment, step A2: select the asset with the highest sorting priority as the first target asset, control the RFID operation device bound to it to move to the corresponding first preset location, and start to establish a communication link with other assets to be operated, including the following steps:

[0042] Based on the binding relationship between the asset and the operation device, activate the RFID operation device physically bound to the first target asset, and start the operation device to move to the first preset location;

[0043] Before moving, initializing a multi-channel communication protocol stack, establishing a two-way communication link between the operating device and all other assets to be operated in the region;

[0044] The operating device reaches the first preset position within a time window, and after the asset arrives, the operating device broadcasts a second notification message to other target assets, triggering the operation condition judgment of subsequent assets in the ordering sequence.

[0045] The application also provides a public asset management system based on RFID tags, including a task planning module, a state coordination module, and an operation execution module;

[0046] The task planning module is used to develop an operation sequence and trigger position according to asset importance, urgency, and spatial correlation, configure the standby state of the RFID reader and the operating device during initialization, generate a task list of the first target asset information, the operation sequence, and the trigger position;

[0047] The state coordination module is used to receive the first target asset information, control the operating device bound to the first target asset information to move to the corresponding position and establish a communication link, receive the notification message sent by the operation device of other assets containing the RFID identifier and the state, distinguish the global precedent assets and the adjacent precedent assets according to the ordering logic, verify whether the notification of the global precedent assets is received and whether they all arrive, whether the notification and arrival of the adjacent precedent assets meet the requirements, and allow the operation to be performed when the requirements are met, and generate an operation instruction;

[0048] The operation execution module is used to control the operating device to perform read-write operation on the RFID tag of the target asset after receiving the operation instruction.

[0049] In the above technical solution, the application provides technical effects and advantages:

[0050] The application realizes the orderly scheduling and precise control of multi-asset operation by developing a clear operation sequence and trigger position for public assets in a preset area and tracking the asset state in real time based on RFID tags; through the dual-state verification mechanism of distinguishing global precedent assets (all assets sorted in front) and adjacent precedent assets (the previous asset sorted continuously), it ensures that the operation of the current target asset is started only after all key precedent tasks are completed, effectively avoiding operation conflicts and process breaks; at the same time, through the real-time interaction of state notifications between operating devices, a chain-like collaborative operation process based on the preset ordering is constructed, so that each asset operation strictly follows the logical sequence to be executed in turn, significantly improving the standardization, process rigor, and overall execution efficiency of public asset management, reducing resource waste and management cost, and meeting the core needs of modern public asset management for efficient collaboration, precise control, and orderly execution. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0052] Figure 1 Flowchart of the management method of the present application.

[0053] Figure 2 Framework diagram of the management system of the present application. DETAILED DESCRIPTION

[0054] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0055] Embodiment 1: Please refer to Figure 1 The present embodiment is a public asset management method based on RFID tags. The management method comprises the following steps:

[0056] A1: According to a preset rule (such as asset importance, use urgency, space layout correlation), an operation execution sequence (preset sequence) is formulated for public assets (such as equipment, tools, furniture) with RFID tags in a preset area, and the operation trigger position (preset position) corresponding to each asset is specified (such as the current storage point of the asset, the specific point where inventorying / maintenance needs to be performed). When the system is initialized, the RFID reader / writer or automatic operation device (such as AGV, mechanical arm) deployed at each asset position is in standby state, ready to receive operation instructions. This step lays the foundation for the orderly operation of subsequent assets, ensuring that multiple asset tasks proceed according to reasonable logic.

[0057] A2: Select the asset with the highest priority for processing in the current preset sequence (marked as "first target asset"), and control the RFID operation device (such as reader / writer, mobile robot) bound to it to move to the first preset position corresponding to the asset (i.e. the actual storage position of the asset or the specific point where operation needs to be performed). Before starting the movement, the system synchronously establishes a communication link with other assets to be operated (i.e. "other target assets"), ready to receive their status notifications. This step is the starting point for the execution of actual asset operation, ensuring that the operation device accurately reaches the target asset.

[0058] A3: When the RFID operation device of the first target asset reaches the first preset position, the system first receives the second notification message (containing the RFID identification information of each asset and the state of whether it has reached the corresponding preset position) sent by other target asset operation devices through the RFID reader or the built-in communication module. Based on the preset sorting logic, the system determines whether there are assets (including global pre-sequencing assets and adjacent pre-sequencing assets) that are located before the first target asset according to the preset sorting:

[0059] Global pre-sequencing asset judgment: Check whether the second notification message corresponding to all assets located before the first target asset according to the preset sorting (not limited to adjacent) is received (confirm that they have reached their respective preset positions); at the same time, verify through RFID positioning whether these pre-sequencing assets have actually reached the corresponding positions.

[0060] Adjacent pre-sequencing asset judgment: Pay special attention to assets (adjacent pre-sequencing assets) that are located before the first target asset according to the preset sorting and are directly adjacent to it (the sequence numbers are continuous), check whether the second notification message corresponding to the adjacent pre-sequencing asset is received, and verify through RFID whether it has actually reached the preset position.

[0061] This step establishes a cooperative waiting mechanism between asset operations, ensuring that the operation sequence conforms to the preset logic.

[0062] A4: Based on the judgment result of step A3, the system performs strict cooperative condition verification:

[0063] Condition one (global pre-sequencing): If the first target asset does not receive the second notification message corresponding to all assets located before it according to the preset sorting (global pre-sequencing assets) (i.e., these pre-sequencing assets have not confirmed arrival), or through RFID verification finds that any of these pre-sequencing assets has not actually reached its corresponding preset position, the RFID operation device of the first target asset does not confirm that it has reached the first preset position (i.e., suspends the execution of subsequent operations and remains in a waiting state).

[0064] Condition two (adjacent pre-sequencing): If the first target asset does not receive the second notification message corresponding to the asset located before it according to the preset sorting and adjacent to it (adjacent pre-sequencing asset), or through RFID verification finds that the adjacent pre-sequencing asset has not actually reached its preset position, the RFID operation device of the first target asset also does not confirm that it has reached the first preset position (i.e., further ensures the completion of the adjacent pre-sequencing task and avoids operation conflicts).

[0065] This step ensures strict compliance with the operation sequence through a double verification mechanism (global + adjacent pre-sequencing) to prevent operation flow confusion.

[0066] A5: Only when the following two conditions are met at the same time, the RFID operation device of the first target asset confirms that "the first preset position has been reached" and performs the subsequent operation:

[0067] All second notification messages corresponding to assets (global pre-asset) located before the first target asset according to the preset order have been received, and it is confirmed through RFID verification that they have all reached their respective preset positions;

[0068] And the second notification message corresponding to the asset (adjacent pre-asset) located before and adjacent to the first target asset according to the preset order has been received, and it is confirmed through RFID verification that the adjacent pre-asset has reached the preset position.

[0069] After the operation is confirmed, the RFID operation device reads / writes (such as updates the asset state, records the operation time) the tag of the first target asset, completes the preset task of inventory, maintenance or deployment, and sends the first notification message (including its own RFID identification and "operation confirmed" state) to other target asset operation devices. This step triggers the operation condition judgment of the subsequent assets, forming a chain collaborative operation process based on the preset order, and finally realizing the orderly and efficient management of all public assets in the region.

[0070] The present application realizes the orderly scheduling and precise control of multi-asset operation by formulating a clear operation sequence and triggering position for public assets in the preset area, and tracking the asset state in real time based on the RFID tag; through the dual state verification mechanism of distinguishing global pre-asset (all assets sorted in front) and adjacent pre-asset (the previous asset sorted continuously), it ensures that the operation of the current target asset only starts after all key pre-asset tasks are completed, effectively avoiding operation conflicts and process breaks; at the same time, through the real-time interaction of state notification between operation devices, a chain collaborative operation process based on the preset order is constructed, which makes each asset operation strictly follow the logical sequence to execute in turn, significantly improving the standardization, process rigor and overall execution efficiency of public asset management, reducing resource waste and management cost, and meeting the core needs of modern public asset management for efficient collaboration, precise control and orderly execution.

[0071] Embodiment 2: Please refer to Figure 2 The public asset management system based on RFID tag in the embodiment includes a task planning module, a state coordination module and an operation execution module;

[0072] Task planning module: This module is responsible for unified management planning of all public assets with RFID tags in the preset area. According to the preset rules such as the importance level of the asset, the use emergency degree, and the spatial layout correlation, a detailed operation execution sequence (i.e., preset sorting) and the corresponding operation trigger position (such as the current storage point of the asset, the specific point to be executed for inventory / maintenance) are formulated for each asset. The module configures the standby state of the RFID reader and the automatic operation device (such as AGV, mechanical arm) at the system initialization, to ensure that these operation devices can respond to the task instructions in time. The module generates a task list containing asset identification, operation sequence, trigger position, and other information, and sends the information of the currently most priority processed asset (first target asset) to the operation control module, while providing the sorting rules and position information to the state coordination module as verification basis. As the front-end planning unit of the system, this module provides an orderly execution framework for the entire asset management process.

[0073] State coordination module: This module receives the first target asset information sent by the asset sorting and task planning module, controls the RFID operation device (such as the reader, mobile robot) bound to the asset to move to the corresponding first preset position, and establishes a communication link with other assets to be operated before starting to move. When the first target asset arrives at the designated position, the module receives the second notification message containing the RFID identification and position state sent by other asset operation devices, and distinguishes the global precedent assets (all assets sorted in front) and the adjacent precedent assets (the previous asset sorted continuously) according to the preset sorting logic. The module performs strict double verification: if the state notification of all global precedent assets is not received or any global precedent asset is not actually arrived, the arrival is not confirmed; if the adjacent precedent asset notification is not received or the adjacent precedent asset is not arrived, the arrival is also not confirmed. Only when all verification conditions are met, the module confirms the arrival of the first target asset and allows the subsequent operation to be performed. The module feeds back the verification result and asset state information to the asset sorting and task planning module, and sends the operation execution instruction to the operation execution module, as the bridge connecting planning and execution, to ensure the orderly coordination of multi-asset operation.

[0074] Operation execution module: After receiving the confirmation instruction from the operation control and state coordination module, this module controls the RFID operation device to perform the preset operation (such as updating asset status, recording operation time, etc.) on the RFID tag of the first target asset. After the operation is completed, the module generates a notification message containing its own RFID identification and the confirmed operation state, and sends the message to the operation control and state coordination module. After receiving this confirmation notification, the operation control and state coordination module triggers the subsequent asset operation condition judgment, forming a chain-like cooperative operation process based on the preset sequence. This module is also responsible for feeding back the asset state data and operation results collected during the operation to the asset sequencing and task planning module, for updating asset status information and optimizing subsequent task planning. As the execution terminal of the system, this module ensures the accurate execution of asset operation instructions and the timely feedback of state information, and is the key link to realize the closed loop of the entire public asset management process.

[0075] Module association: The asset sequencing and task planning module formulates the operation sequence and location information, determines the first target asset and sends it to the operation control and state coordination module; the operation control and state coordination module controls the operation device to move to the target location, receives and verifies other asset state notifications, confirms that the operation conditions are met, and allows the operation to be performed, and sends the operation instruction to the operation execution and feedback module; the operation execution and feedback module executes the specific RFID tag operation, generates a confirmation notification and returns it to the operation control and state coordination module, which in turn triggers the subsequent asset operation process. The three modules work closely together to form a complete asset management chain from task planning, state verification to operation execution, ensuring the orderliness, safety and efficiency of multi-asset operation.

[0076] Example 3: A1: According to the preset rules (such as asset importance, use urgency, spatial layout correlation), the operation execution sequence (preset sequence) is formulated for the public assets (such as equipment, tools, furniture) with RFID tags in the preset area, and the operation trigger position (preset position) corresponding to each asset is specified (such as the current storage point of the asset, the specific point where the inventory / maintenance needs to be performed). During system initialization, the RFID readers or automatic operation devices (such as AGV, robotic arm) deployed at each asset location are in standby state, ready to receive operation instructions. This step lays the foundation for the orderly operation of subsequent assets, ensuring that multi-asset tasks proceed in a reasonable logic.

[0077] Based on the preset rules (including but not limited to asset criticality weight evaluation, use timeliness urgency analysis, space topology correlation modeling), the operation priority of the public asset entities (covering instrument equipment, operation tool, office furniture, etc. fixed asset categories) deployed with RFID electronic tags within the preset geographic fence range is sorted and the coordinate calibration is triggered. The specific processing logic is as follows: first, a multi-dimensional evaluation matrix is constructed, and for each asset object, the asset importance index (such as asset net value, business continuity influence coefficient), the use urgency parameter (such as the planned use time window, the maintenance cycle critical value), and the space layout correlation characteristic (such as the co-location probability with other high-frequency operation assets, the regional function partition matching degree) are extracted, and the global sorting sequence is generated by a weighted aggregation algorithm (nonlinear normalization processing is followed by a preset weight ratio to synthesize the comprehensive priority score, for example, the asset importance accounts for 40% of the weight, the urgency accounts for 30% of the weight, and the space correlation accounts for 30% of the weight), and the operation execution order of each asset entity (i.e. the preset sorting) is determined; the current physical state data of the asset (such as the storage location coordinates and environmental parameters fed back by the RFID tag in real time) is analyzed synchronously, and the corresponding operation trigger location (i.e. the preset location) is determined according to the task type demand (such as periodic inventory, preventive maintenance, emergency allocation), which can be the static storage point of the asset (such as warehouse shelf number X-Y-Z), the dynamic operation target point (such as production workshop station A), or the special task execution area (such as device detection center B area).

[0078] In the system startup stage, the RFID sensing terminal (including but not limited to fixed reader / writer, handheld scanning device) and the automated operation mechanism (such as AGV transport robot, mechanical arm operation unit) deployed at the asset physical location complete the initialization configuration, specifically including: establishing a bidirectional communication link with the central control unit (using MQTT or CoAP protocol to realize state reporting and instruction receiving), loading the preset sorting and trigger location parameters to the local task queue, calibrating the positioning module (such as UWB high-precision positioning or Bluetooth beacon triangulation) to ensure the spatial coordinate resolution accuracy (error range ≤5cm), activating the sensor array (such as infrared proximity detector, vibration monitoring module) in sleep state for operation environment sensing. All sensing and execution units enter low-power standby mode, continuously listen to the operation trigger instructions (trigger conditions include timing polling, event-driven or priority preemption signal) issued by the central control unit, and ensure that after receiving the operation instruction for a specific asset entity, the state switching and corresponding action can be completed within the specified time window (response delay ≤2 seconds). This step constructs the basic logic framework of multi-asset collaborative operation through structured sorting algorithm and accurate position calibration, provides necessary prerequisites for subsequent ordered task distribution based on time constraint, cross-device collaborative scheduling, and full-process traceable management, effectively avoids the resource conflict, efficiency loss and state out-of-control risk caused by disordered operation in traditional asset management.

[0079] To ensure that the skilled person can fully implement, the system in step A1 is parameterized constraint on the identification and initial positioning of target assets: the RFID reader operating frequency range is 860-960 MHz, the transmission power is adjustable (typical value 30 dBm); after the target asset enters the reader sensing area, its tag is identified through the EPCGen2 protocol, and the identification time is not more than 50 ms. The EPC code returned by the tag is in 96-bit or 128-bit binary format, which is used to uniquely identify the asset; at the same time, the reader collects the signal strength (RSSI, unit dBm, detection accuracy ±1 dB) of the tag in real time, and if RSSI≥-90dBm, it is determined that the tag is in the effective sensing area. The asset position coordinates (x, y, z) are obtained by installing a three-dimensional positioning reader array in the site, the positioning accuracy is ≤5 cm, the calculation method is multi-point ranging three-edge positioning, and the result is stored as a three-dimensional floating point number (accuracy 0.01 m). The system records the initial information of the target asset in the local cache area, including EPC code, collection timestamp (UTC, millisecond level accuracy), RSSI value, spatial coordinate value (x, y, z), and provides input data for subsequent steps A2-A5 verification and collaborative operation.

[0080] A2: Select the asset with the highest priority in the current preset order (marked as "first target asset") and control the RFID operation device (such as reader, mobile robot) bound to it to move to the first preset position corresponding to the asset (i.e. the actual storage location of the asset or the specific point where the operation needs to be performed). Before starting the movement, the system synchronously establishes communication links with other assets to be operated (i.e. "other target assets") and prepares to receive their state notifications. This step is the starting point of the actual asset operation execution, ensuring that the operation device accurately reaches the target asset.

[0081] Determine the asset unit that needs to be processed in priority through the priority index algorithm (retrieved in descending order of sorting priority, select the first asset entity in the sequence as the current operation object, i.e. "first target asset") and synchronously analyze its associated preset position parameters (including spatial coordinate triple [x, y, z], regional function identifier and environmental parameter threshold). Control system based on asset-operation device binding relationship mapping table (pre-stored in central database key-value pair structure, key is asset RFID unique identifier EPC, value is corresponding operation device ID and type code), retrieve and activate the special RFID operation device (including but not limited to high frequency / ultra-high frequency reader, AGV transport robot integrated with RFID module, six-axis mechanical arm, etc. execution mechanism) physically bound to the first target asset.

[0082] The motion control logic of the operating device adopts a hierarchical path planning algorithm: first, the global path planning module (based on the improved A* algorithm, input: topological map of the current coordinates of the operating device and the target position coordinates, output: optimal navigation path avoiding obstacles) calculates the collision-free travel route from the current standby position to the first preset position; second, the local obstacle avoidance module (real-time collection of environmental data from laser radar / visual sensors, dynamic adjustment of travel direction to avoid moving obstacles) ensures that the operating device accurately reaches the target point in a complex physical environment. Before starting physical movement, the system synchronously initializes the multi-channel communication protocol stack (including Zigbee short-range communication based on IEEE802.15.4, Wi-Fi6 medium-range transmission, and 5G private network long-range backhaul), establishes a bidirectional communication link between the RFID operating device and all other assets to be operated in the region (i.e. "other target assets", referring to entities with lower priority than the current asset but in the same task batch in the preset order) bound (the communication protocol uses MQTT or CoAP lightweight Internet of Things protocol, heartbeat packet interval ≤100ms to ensure connection stability).

[0083] This communication link is mainly used to receive periodic status notification messages reported by other target asset operating devices (message format follows the custom TLV encoding structure, containing fields: asset RFID identifier (20 bytes), current state code (4 bytes), preset position arrival flag bit (1 bit), timestamp (8 bytes)), providing real-time data input for subsequent asset state verification. Through precise positioning control and multi-device communication pre-configuration in this step, the RFID operating device can reach the operation trigger position of the first target asset within a strict time window (positioning error ≤3cm, arrival delay ≤5 seconds), and simultaneously build the communication infrastructure required for collaborative operation, laying a technical foundation for subsequent ordered operation execution based on pre-state confirmation.

[0084] In step A2, the system parameterizes the sorting and notification mechanism of the target assets: the system preset sorting basis is the sorting number N, with a value range of 1≤N≤10,000. Each asset is assigned a unique serial number by the database at system initialization and stored in the extended user area (USER Memory, length 128 bits) of its RFID tag. The sorting rule is ascending order, i.e. assets with smaller serial numbers are given priority over assets with larger serial numbers for operation.

[0085] When the asset arrives at the preset position and completes state confirmation, its operating device broadcasts a second notification message to other assets. This message uses the TLV (Type-Length-Value) encoding structure, with a length not exceeding 256 bytes. Key fields include:

[0086] Asset EPC code (96 / 128 bits binary, ASCII encoding storage);

[0087] Sequence number N (integer, 4 bytes, value range 1-10,000);

[0088] Status code (1 byte, 0x00=not completed, 0x01=arrived, 0x02=operation completed);

[0089] Timestamp (UTC format, precision 1 ms, 8 bytes occupied).

[0090] The communication adopts MQTT protocol, the QoS level is set to 1 (at least one transmission), the network delay requirement is ≤100 ms, and the upper limit of the number of retransmissions of a single message is 3 times. The receiving device stores the received messages in a local ring buffer area, the buffer capacity is 100 (extensible), and when overflow, the old messages are discarded using the "first-in, first-out" strategy.

[0091] In the sorting execution logic, the system maintains the global asset execution order through the priority queue scheduling algorithm (time complexity O(logN)), ensuring that the operation trigger strictly follows the preset sequence chain. If the message of the adjacent previous asset is not received within 500 ms, the "previous timeout" flag is triggered and enters the waiting mode, and the abnormal code (such as 0x02 indicating message missing) is recorded.

[0092] A3: After the RFID operation device of the first target asset arrives at the first preset position, the system first receives the second notification message (including the RFID identification information of each asset and its state whether it has arrived at the corresponding preset position) sent by other target asset operation devices through the RFID reader or built-in communication module. Based on the preset sorting logic, the system determines whether there are assets (including global previous assets and adjacent previous assets) that are located before the first target asset according to the sorting:

[0093] Global previous asset judgment: Check whether the second notification message corresponding to all assets (not limited to adjacent) that are located before the first target asset according to the preset sorting (confirm that they have arrived at their respective preset positions) is received; at the same time, verify whether these previous assets have actually arrived at the corresponding position through RFID positioning.

[0094] Adjacent previous asset judgment: Pay special attention to the assets (adjacent previous assets) that are located before the first target asset according to the preset sorting and are directly adjacent to it (the sequence numbers are continuous), check whether the second notification message corresponding to the adjacent previous asset is received, and verify whether it has actually arrived at the preset position through RFID.

[0095] This step establishes a cooperative waiting mechanism between asset operations, ensuring that the operation sequence conforms to the preset logic.

[0096] When the RFID operating device of the first target asset confirms the arrival at the first preset position (coordinate error ≤ 3 cm) through the built-in positioning module (such as UWB high-precision positioning or visual servo system), the system triggers the multi-source state perception process: first, through the RFID reader (ultra-high frequency band with a working frequency of 860-960 MHz, sensitivity ≤-80 dBm) or integrated communication module (Zigbee / Thread protocol stack based on IEEE802.15.4 standard) carried by the operating device, the second notification message sent by other target asset operating devices is received in a broadcast-response mode (polling period ≤ 200 ms). The message uses TLV (Tag-Length-Value) encoding structure, including key fields: asset unique identifier (EPC encoding, 96 bits or 128 bits), current state code (4-bit hexadecimal, 0x01 represents having arrived at the preset position), position verification hash value (encrypted digest of asset coordinates and timestamp based on SHA-256 algorithm), timestamp (UTC format, accuracy to millisecond level) and operating device health status bit (8-bit binary mask).

[0097] The system performs hierarchical verification based on the preset sorting logic (sorting index table stored in the central control unit, implemented by B+ tree structure for fast retrieval):

[0098] Global Preceding Asset Judgment: Through the sorting sequence retrieval algorithm (input is the target asset sorting number N, and the output is the asset set with all sorting numbers < N), all global preceding assets (not limited by physical adjacent relationship) located before the first target asset in the preset sorting are extracted. The verification logic includes two parallel sub-processes:

[0099] Communication Verification Sub-process: Check whether the second notification messages corresponding to these global preceding assets exist in the state message receiving buffer area (match the message source through EPC encoding), if there are un-received messages (i.e. missing count > 0), mark as "predecessor state not confirmed";

[0100] Physical Verification Sub-process: For the global preceding assets that have received notifications, through RFID positioning cross verification (read the real-time position data of its RFID tag, and calculate the Euclidean distance with the preset position coordinates, threshold ≤ 5 cm) to confirm whether it has actually arrived at the corresponding point, if the position deviation of any asset exceeds the threshold or the tag does not respond (RSSI < -90 dBm), mark as "physically not arrived".

[0101] Adjacent Preceding Asset Judgment: Focus on the directly adjacent preceding asset with sorting number N-1 (i.e. the preceding operating object immediately adjacent to the first target asset), through the special retrieval algorithm (input target number N, output asset information with number N-1), the state message of the specific asset is extracted. The verification logic requires to meet the following conditions simultaneously:

[0102] Message integrity: There must be a unique second notification message of the adjacent predecessor asset in the receiving buffer area (EPC code matches exactly);

[0103] Physical consistency: The Euclidean distance between the real-time location of its RFID tag and the preset location is ≤5 cm, and the tag response signal strength (RSSI) is ≥-85 dBm (to ensure reliable reading in a non-interference environment).

[0104] This step builds a strict operation timing control logic through a two-dimensional (global + adjacent) state verification mechanism: if any global predecessor asset has not sent a confirmation message or its physical location has not been verified, or the state message of the adjacent predecessor asset is missing / abnormal, the system triggers a coordinated waiting process (the operation device enters a low-power standby mode, retries state query every 500 ms, and the maximum waiting time is ≤30 seconds) until all key predecessor conditions are met. This mechanism ensures the timing compliance of multi-asset operations and avoids resource conflicts or process failures caused by incorrect operation order (for example, to prevent starting the current asset operation when the dependent device is not in place), providing a reliable coordination basis for subsequent operation execution.

[0105] In step A3, the system performs state verification on global predecessor assets and adjacent predecessor assets, using the following numerical settings:

[0106] Message reception and cache management: The system establishes a ring buffer area in the local operation device with a capacity of 200 messages; each message is ≤256 bytes in size, and the format uses TLV encoding; the message retention period is 30 seconds, and it is automatically overwritten and cleared after expiration.

[0107] The system uses EPC code (96 bits / 128 bits) + sequence number N (4-byte integer) for unique matching; if any predecessor asset message is missing in the cache, it immediately returns a "not confirmed" flag.

[0108] RFID tag physical location verification: The system uses an ultra-high frequency RFID reader (working frequency 860-960 MHz, transmission power ≤30 dBm); tag coordinates are obtained through the three-point ranging method with a sampling frequency of 10 Hz; the preset position deviation threshold is ≤5 cm.

[0109] Signal strength (RSSI) threshold: For global predecessor assets, RSSI ≥-90 dBm (to ensure basic reliable communication); for adjacent predecessor assets, RSSI ≥-85 dBm (more stringent due to direct dependence); if the RSSI is below the threshold, it is marked as "not confirmed".

[0110] Determination and polling mechanism: verification period: every 500 ms; maximum waiting time: ≤30 seconds; if the previous asset state cannot be confirmed within 30 seconds, the system triggers an exception code (such as 0x04 = previous state timeout);

[0111] The verification logic adopts a double-branch tree structure:

[0112] Branch one: global prequel set G = {G1, G2, …, G n} whether all pass through the message + physical verification;

[0113] Branch two: adjacent prequel asset G n-1 whether individually pass through the message + physical verification;

[0114] If either branch fails, it enters a "waiting / blocking" state, and the state light switches to yellow flashing (2 Hz).

[0115] A4: Based on the judgment result of step A3, the system performs strict cooperative condition verification:

[0116] Condition one (global prequel): if the first target asset does not receive the second notification message corresponding to all assets that are located before it according to the preset order (global prequel assets), or through RFID verification finds that any of these prequel assets has not actually arrived at its corresponding preset position, the RFID operation device of the first target asset does not confirm that it has arrived at the first preset position (i.e., suspends the execution of subsequent operations and remains in a waiting state).

[0117] Condition two (adjacent prequel): if the first target asset does not receive the second notification message corresponding to the asset that is located before it according to the preset order and adjacent to it (adjacent prequel asset), or through RFID verification finds that the adjacent prequel asset has not actually arrived at its preset position, the RFID operation device of the first target asset also does not confirm that it has arrived at the first preset position (i.e., further ensures the completion of the adjacent prequel task to avoid operation conflicts).

[0118] This step ensures strict adherence to the operation sequence through a double verification mechanism (global + adjacent prequel) to prevent operation flow confusion.

[0119] Based on the state verification results of the global prequel assets and adjacent prequel assets in step A3, the system performs hierarchical condition judgment logic to ensure strict adherence to the operation sequence through a strict cooperative condition verification mechanism. This processing flow adopts a double-branch decision tree structure, which independently verifies the global prequel asset set and the adjacent prequel asset individually. If any condition is not met, the operation suspension mechanism is triggered. The specific logic is as follows:

[0120] Condition 1 (Global Pre-Verification): The system first retrieves the output of the global pre-asset judgment sub-process in step A3 (i.e., the set of all assets whose sorting number is less than the first target asset (sorting number N), denoted as set G={G1,G2,...,G...}). n}, where n is the number of global preceding assets. The verification logic consists of two sub-functions that execute in parallel:

[0121] The message completeness check function iterates through the second notification message buffer (a circular buffer stored in the operating device's memory, with a capacity equal to the size of set G) corresponding to each asset in set G, and checks for any unreceived messages (i.e., a message missing for any asset in set G is marked as True) by matching EPC codes. If a missing message is detected (e.g., the k-th asset G in set G), the function checks for any missing messages. k If a message is not received and the missing count is 1, then it is determined as "Global Precedence Status Unacknowledged".

[0122] Physical arrival verification function: For assets in set G that have received notification, extract their real-time location data of RFID tags (coordinate values ​​(x, y, y) read by the RFID reader in step A3). i ,y i ,z i )) and preset position coordinates (x) p ,y p ,z p Perform Euclidean distance calculation (the calculation logic is as follows:) The location deviation of any asset is compared with a preset threshold (usually 5cm). If the location deviation dᵢ of any asset is greater than 5cm (for example, the actual location of asset Gm is 6cm away from the preset location), or the response signal strength (RSSI) of the asset's RFID tag is lower than the communication reliability threshold (e.g., -90dBm, indicating that the tag may not be in the effective sensing area), it is determined as "physical not arrived".

[0123] If either the message completeness check function or the physical arrival verification function returns an "unsatisfied" result (i.e., there is a global preceding asset that has not been confirmed to have arrived), an operation suppression instruction is triggered: the RFID operating device of the first target asset enters a waiting state (the operation execution thread is suspended, and the status indicator shows "precedence not ready"), suspends subsequent tag reading and writing operations, and starts a retry timer (with a period of 500ms and a maximum waiting time of ≤30 seconds), during which the status update of the global preceding asset is continuously polled.

[0124] Condition 2 (Adjacent Precedence Verification): The system further focuses on the adjacent preceding assets with sorting index N-1 (denoted as G). n-1 ), execute specific verification logic:

[0125] Message Existence Detection: Check if there is a message for G n-1 in the second notification message buffer received by step A3 (exact match by EPC encoding of the unique identifier), if not found (message missing flag True), determine as "missing adjacent predecessor notification".

[0126] Physical Consistency Verification: Calculate the Euclidean distance between the real-time location data (coordinates (x n-1 ,y n-1 ,z n-1 ) of the RFID tag of G n-1 and the preset location coordinates, and additionally check the signal strength (RSSI ≥ -85dBm, to ensure reliable communication in a low interference environment). If the calculated distance d n-1 > 5cm (e.g. adjacent predecessor asset actual location offset 7cm), or RSSI <-85dBm (e.g. -92dBm), determine as "adjacent predecessor physical not arrived".

[0127] If either of the results of message existence detection or physical consistency verification is "not met" (i.e. adjacent predecessor asset did not send notification or its actual location was not verified), the operation inhibition instruction is also triggered: the RFID operation device of the first target asset remains in a waiting state, suspending the execution of subsequent operations (such as tag writing, state updating, etc.), and through the communication module, feedbacks an "adjacent predecessor blocking" exception code (such as 0x03) to the central control unit, prompting the operation and maintenance personnel to focus on troubleshooting the operation state of the adjacent predecessor asset.

[0128] This step builds a "full link + key neighborhood" collaborative control mechanism through dual strict verification of global predecessors (covering all assets sorted in front) and adjacent predecessors (focusing on directly related assets), ensuring that the operation of the current target asset can only be started on the premise that all key predecessor tasks (including non-adjacent global predecessors and directly related adjacent predecessors) are completed in order and physically in place, fundamentally avoiding resource conflicts (such as multiple devices occupying the same station), process breaks (such as operations relying on predecessor asset data failing), or management confusion (such as asset state update timing error) caused by operation sequence disorder, providing strong consistency timing guarantee for the precise execution of subsequent operations.

[0129] Global Predecessor Asset Condition Verification: Check the state of all assets with a sorting number less than the first target asset N in the set G = {G1, G2, …, G n};

[0130] Message Completeness Detection: Each asset message uses TLV encoding (≤256 bytes), buffer capacity 200, polling period 500ms;

[0131] If any asset message is missing or the position is beyond the distance threshold, the operation suppression instruction is triggered, the operation device enters the "waiting" state, and the state light displays yellow flashing (2Hz). The maximum waiting time is 30 seconds, and if it exceeds, the exception code 0x04 = global pre-sequence timeout is triggered;

[0132] Adjacent pre-sequence asset condition verification: pay attention to the asset G with the sequence number N-1 n-1 ; The asset unique second notification message (EPC exact match) must exist in the cache area; the real-time coordinates and the preset coordinates have a Euclidean distance of ≤5 cm, and the RSSI is ≥-85dBm; if not satisfied, the operation suppression instruction is triggered, the waiting state is maintained, the state light displays red flashing (2Hz), and the exception code 0x03 = adjacent pre-sequence blockage is reported.

[0133] Polling and retry mechanism: the system polls the pre-sequence state every 500ms; the maximum waiting time is 30 seconds; during the waiting period, the operation device maintains a low power consumption mode, and the environmental perception module still collects obstacle information and communication link state to ensure that it can resume execution at any time; when the pre-sequence asset state satisfies the global + adjacent conditions during the waiting period, it automatically exits the waiting and triggers the next operation.

[0134] Dual-branch decision structure:

[0135] Branch one: message completeness + physical arrival of the global pre-sequence asset G;

[0136] Branch two: message existence + physical consistency of the adjacent pre-sequence asset G n-1 ;

[0137] Logical judgment: only when both branches are satisfied, the operation device of the first target asset confirms that "the first preset position has been arrived"; otherwise, it continues to wait and periodically retries.

[0138] A5: Only when the following two conditions are met, the RFID operation device of the first target asset confirms that "the first preset position has been arrived" and performs subsequent operations:

[0139] All second notification messages corresponding to the assets (global pre-sequence assets) located before the first target asset according to the preset sequence have been received, and RFID verification confirms that they have all arrived at their respective preset positions;

[0140] And the second notification message corresponding to the asset (adjacent pre-sequence asset) located before the first target asset and adjacent to it according to the preset sequence has been received, and RFID verification confirms that the adjacent pre-sequence asset has arrived at the preset position.

[0141] After operation confirmation, the RFID operating device reads / writes tags on the first target asset (e.g., updating asset status, recording operation time), completes preset tasks such as inventory, maintenance, or allocation, and sends a first notification message (including its own RFID tag and "operation confirmed" status) to other target asset operating devices. This step triggers subsequent asset operation condition judgments, forming a chain-like collaborative operation process based on a preset order, ultimately achieving orderly and efficient management of all public assets within the area.

[0142] The system triggers the operation confirmation mechanism for the first target asset only when the global pre-verification condition defined in step A4 and the adjacent pre-verification condition are simultaneously satisfied (i.e., the result of the logical AND operation is true). The RFID operating device (such as a reader or mobile robot) of the first target asset confirms "arrival at the first preset position" through its internal state machine (the state transition logic is "waiting → verification passed → operation executed"), and formally initiates the subsequent operation process. This confirmation mechanism uses a two-factor authentication algorithm, and the specific processing logic is as follows:

[0143] Condition 1 (Global Precedence Confirmation): The system monitors the global preceding asset set in real time (all assets with a sort number less than the first target asset (sort number N), denoted as G={G1,G2,...,G...}). n The state verification result of}). The global preorder condition is satisfied if and only if both of the following conditions are met:

[0144] Message completeness: The operating device receives second notification messages corresponding to all assets in set G that exist in the buffer (ensuring no omissions through EPC encoding matching, with a missing count of 0).

[0145] Physical arrival consistency: for each asset G in set G i Real-time location (coordinates (x, y) of RFID tags (i=1,2,...,n) i ,y i ,z i )) and preset position coordinates (x) p ,y p ,z p The Euclidean distances between the tags are all less than or equal to the preset distance threshold (e.g., 5cm), and the tag response signal strength (RSSI) is ≥-90dBm (to ensure communication reliability).

[0146] Condition 2 (Confirmation of Adjacent Preceding Assets): For the adjacent preceding asset with sorting number N-1 (denoted as G) n-1 ), must simultaneously meet:

[0147] Message Existence: G exists in the receive buffer. n-1 The only second notification message (EPC encoding exact match, no loss);

[0148] Physical consistency: G n-1 The Euclidean distance between the real-time location of the RFID tag and the preset location is ≤5cm, and the RSSI is ≥-85dBm (higher sensitivity requirement, as it is directly associated with assets).

[0149] When both of the above conditions are verified, the control unit of the operating device (such as an embedded microprocessor) sends an "operation permission" instruction to the execution module (such as an RFID read / write module or a robotic arm control unit) to confirm that the current asset has met all the preceding coordination requirements.

[0150] Operation execution phase: The operating device performs preset task operations on the RFID tag of the first target asset (functional logic is dynamically called according to the task type):

[0151] Reading operation: Read the basic information stored in the tag (such as asset number, last maintenance time, and current status code) using a high-frequency / ultra-high-frequency reader (operating frequency 860-960MHz, power ≤30dBm) with EPCGen2 protocol.

[0152] Write operations: Update dynamic fields within the tag (such as changing the status code from "Pending Inventory" to "Inventory Completed", recording the current operation timestamp (UTC format, accurate to milliseconds), and writing the operator ID or device serial number) to ensure the real-time nature and traceability of asset status information;

[0153] Extended tasks: For specific scenarios (such as equipment maintenance), additional composite operations such as sensor data acquisition (such as reading temperature / humidity sensor values ​​and writing them to tags) and equipment function self-test (triggering the equipment's built-in diagnostic module via RFID) can be performed.

[0154] Chain-based collaborative triggering: After the operation is completed, the operating device broadcasts a first notification message to the operating devices bound to other assets to be operated (i.e., "other target assets") within the area via the communication module (based on MQTT or CoAP protocol). The message format adopts a TLV encoding structure and includes key fields: the first target asset RFID identifier (EPC encoding, 96-bit or 128-bit), the operation completion status code (0x01 indicates success), the current sorting sequence number (N), and the timestamp (UTC millisecond level). After receiving the message, the other target asset operating devices use it as input data for updating the status of preceding assets, update the locally stored global preceding asset status list (e.g., mark the status of the first target asset as "confirmed arrival and operation"), and re-execute the preceding verification logic of steps A3-A4.

[0155] Through the precise condition control and operation execution of this step, the system realizes the chain coordination mechanism of "single asset operation confirmation → global state update → subsequent asset condition triggering", ensures that multi-asset operations strictly follow the preset sorting logic (such as completing the spatially adjacent and logically dependent previous asset operation first, and then executing the current asset task), avoids operation conflicts (such as multiple devices simultaneously occupying the same station), process breaks (such as invalidation of operations dependent on previous data), or management confusion (such as asset state update timing errors), and ultimately forms an efficient, orderly, and scalable public asset management process based on the preset sorting, significantly improving the collaborative management efficiency and execution reliability of large-scale asset clusters.

[0156] In step A5, the RFID operation device of the first target asset confirms "has arrived at the first preset position" and executes the subsequent operation only when the following conditions are met simultaneously:

[0157] Global previous asset confirmation condition: The state messages of the global previous asset set G = {G1, G2, …, G n must be completely received (matched by EPC encoding, buffer capacity 200, polling period 500ms); the real-time coordinates (x i , y i , z i of each G i） must be within a Euclidean distance of 5cm from the preset position (x p , y p , z p） , and RSSI ≥ -90dBm;

[0158] If any condition is not met, the operation device enters a waiting state, with the status indicator light flashing yellow (2Hz), and the maximum waiting time is 30 seconds, triggering exception code 0x04 = global previous.

[0159] Adjacent previous asset confirmation condition: The unique second notification message of the adjacent previous asset G n-1 with sorting number N-1 must be completely received (EPC exact match); the real-time coordinates must be within a Euclidean distance of 5cm from the preset coordinates, and RSSI ≥ -85dBm; if the condition is not met, the operation device enters a waiting state, with the status indicator light flashing red (2Hz), and the maximum waiting time is 30 seconds, triggering exception code 0x03 = adjacent previous blocking.

[0160] Operation execution phase: Under the condition that the global and adjacent previous conditions are met simultaneously, the microprocessor of the operation device issues an "operation permission" instruction; the RFID tag of the first target asset is executed to perform the preset task, including:

[0161] Reading operation: high frequency / ultra-high frequency reader / writer (860-960MHz, power ≤30dBm, EPCGen2 protocol) reads the basic information;

[0162] Write operation: update status code (e.g. "to be inventoried" -> "inventoried"), write operation timestamp (UTC, millisecond precision), operation device ID;

[0163] Extended task (optional): collect temperature and humidity sensor data (precision ±0.5℃ / ±2%RH), device function self-check (execution time ≤5 seconds).

[0164] Chain-like cooperative triggering: after operation completion, broadcast first notification message to other target assets via MQTT / CoAP protocol, TLV encoding structure ≤256 bytes, containing:

[0165] Asset EPC number (96 or 128 bits), operation completion status code (0x01=success), ordering sequence number N, timestamp (UTC millisecond level);

[0166] Other assets update local global pre-sequence state list after receiving the message, and re-execute the pre-sequence verification logic of steps A3-A4 to form a chain-like cooperative operation process.

[0167] Polling and exception handling: state polling period 500ms, maximum waiting time 30 seconds; if operation confirmation is overdue, the system automatically marks an exception and triggers operation and maintenance alarm; the operation device remains in low-power mode during the waiting period, and the sensor and communication module continue to work to ensure environmental perception and communication recoverability.

[0168] It should be understood that the term "and / or" herein merely describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. In addition, the character " / " herein generally represents that the front and rear associated objects are in an "or" relationship, but can also represent an "and / or" relationship, which can be understood according to the context before and after.

[0169] It should be understood that in various embodiments of the present application, the size of the sequence number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0170] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0171] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A public asset management method based on RFID tags, characterized in that: The management method includes the following steps: A1: Based on the importance, urgency, and spatial relevance of the assets, determine the operation sequence and triggering location for public assets with RFID tags within the preset area, and the RFID readers or operating devices deployed during initialization are ready to be activated. A2: Select the asset with the highest priority in the sorting as the first target asset, control the RFID operating device bound to it to move to the corresponding first preset position, and establish a communication link with other assets to be operated before starting. A3: After the first target asset arrives, receive a second notification message containing RFID tags and location status sent by other asset operation devices, and distinguish global preceding assets and adjacent preceding assets according to sorting logic; A4: If no global preceding asset status notification is received or any global preceding asset has not actually arrived, the RFID operating device of the first target asset will not confirm arrival. Similarly, if no notification is received from an adjacent preceding asset or the adjacent preceding asset notification has not arrived, the RFID operating device of the first target asset will not confirm arrival. A5: Only when all global preceding asset status notifications are received and all verifications are completed, and the notifications and arrival of adjacent preceding assets are also satisfied, will the arrival be confirmed and tag read / write operations be performed. Simultaneously, a notification containing its own identifier and confirmation status will be sent, triggering subsequent asset condition judgments and forming a sorted chain of collaborative management.

2. The public asset management method based on RFID tags according to claim 1, characterized in that: Step A3: After the first target asset arrives, receive a second notification message containing RFID tags and location status from other asset operation devices, and distinguish between global preceding assets and adjacent preceding assets according to sorting logic, including the following steps: The operating device receives a second notification message sent by other target asset operating devices through an RFID reader / writer mounted on it. Based on a preset sorting logic, determine whether other assets preceding the first target asset have arrived at their corresponding preset positions; Extract the set of all assets whose sorting index is less than the first target asset, and perform message reception verification and physical location verification on each asset; For the adjacent preceding asset G with sort number N-1 n-1 Perform message integrity verification and physical consistency verification; The operating device performs state determination through a dual-branch tree structure logic. If the verification of any branch fails, a collaborative waiting mechanism is triggered. Once both the global preceding asset and the adjacent preceding asset have passed verification, the first target asset is confirmed to meet the conditions for subsequent operations.

3. The public asset management method based on RFID tags according to claim 2, characterized in that: The second notification message uses a TLV encoding structure, with a length of ≤256 bytes, and includes a unique asset identifier, status code, location verification hash value, timestamp, and operating device health status bit.

4. The public asset management method based on RFID tags according to claim 3, characterized in that: The operating device performs state determination through a dual-branch tree structure logic, including the following steps: Branch 1: Whether the entire global preorder set G has passed both message and physical verification; Branch 2: Adjacent Preceding Asset G n-1 Whether to verify via message and physical authentication separately.

5. The public asset management method based on RFID tags according to claim 1, characterized in that: Step A4: If no global preceding asset status notification is received or any global preceding asset has not actually arrived, arrival is not confirmed. Similarly, if no notification is received from an adjacent preceding asset or the adjacent preceding asset notification has not arrived, arrival is not confirmed. This includes the following steps: The operation execution is subject to collaborative condition verification, which includes global prerequisite condition verification and adjacent prerequisite condition verification. When all verifications pass, the RFID operating device of the first target asset is allowed to confirm that it has arrived at the first preset position; otherwise, it continues to wait and retry periodically.

6. The public asset management method based on RFID tags according to claim 5, characterized in that: The global precondition verification processing logic is as follows: For the global precondition asset set whose sorting number is less than that of the first target asset, the message completeness detection function checks whether the second notification message of each asset has been received completely, and the physical arrival verification function calculates the Euclidean distance between the RFID tag coordinates and the preset position coordinates. At the same time, the tag signal strength is checked. If any asset message is missing or the position deviation exceeds the threshold, an operation suppression command is triggered, causing the RFID operation device of the first target asset to enter a waiting state. The adjacent preceding condition verification processing logic is as follows: for the adjacent preceding asset G with sorting index N-1... n-1 The system checks whether there is a unique second notification message for an adjacent preceding asset in the buffer area, and verifies the Euclidean distance and signal strength between the real-time position of the RFID tag of the adjacent preceding asset and the preset position. If any condition is not met, an operation suppression command is triggered to keep the RFID operation device of the first target asset in a waiting state.

7. The public asset management method based on RFID tags according to claim 6, characterized in that: Step A5: Only when all global preceding asset status notifications are received and verified, and adjacent preceding asset notifications and arrival conditions are met, confirm arrival and execute tag read / write operations, simultaneously sending a notification containing its own identifier and confirmation status, triggering subsequent asset condition judgments, forming a sorted chain of collaborative management, including the following steps: When both the global prerequisite and the adjacent prerequisite are satisfied, the microprocessor of the operating device issues an operation permission instruction to execute the preset task operation of the first target asset. After the operation is completed, the operating device broadcasts the first notification message to other target asset operating devices in the area; After receiving the message, other assets update their local global preceding state list and re-execute the preceding verification logic, forming a chain-like collaborative operation process.

8. The public asset management method based on RFID tags according to claim 7, characterized in that: Execute the preset task operations for the first target asset, including: Read operation: Read the information stored in the tag using a reader / writer; Write operations: update asset status code, record operation timestamp, write operation device ID or personnel information; Extended task: Collect sensor data and perform device function self-test operations; The first notification message adopts a TLV encoding structure, including a unique asset identifier, an operation completion status code, a sorting number N, and a timestamp.

9. The public asset management method based on RFID tags according to claim 1, characterized in that: Step A2: Select the asset with the highest priority as the first target asset, control its bound RFID operating device to move to the corresponding first preset position, and establish a communication link with other assets to be operated before starting, including the following steps: Based on the binding relationship between the asset and the operating device, the RFID operating device physically bound to the first target asset is activated, and the operating device is initiated to move to the first preset position. Before moving, initialize the multi-channel communication protocol stack and establish a two-way communication link with the operating devices bound to all other assets to be operated in the area; The operating device reaches the first preset position within the time window. After the asset arrives, the operating device broadcasts a second notification message to other target assets, triggering the operation condition judgment of subsequent assets in the sorting sequence.

10. A public asset management system based on RFID tags, used to implement the management method according to any one of claims 1-9, characterized in that: It includes a task planning module, a state coordination module, and an operation execution module; The task planning module is used to determine the operation sequence and triggering location based on asset importance, urgency, and spatial relevance. During initialization, it configures the standby status of RFID readers and operating devices and generates a task list containing the first target asset information, operation sequence, and triggering location. The status coordination module is used to receive the first target asset information, control the operation device bound to the first target asset information to move to the corresponding position and establish a communication link, receive notification messages containing RFID tags and status sent by other asset operation devices, distinguish global preceding assets and adjacent preceding assets according to sorting logic, verify whether all global preceding asset notifications have been received and arrived, and whether the notifications and arrival of adjacent preceding assets are satisfied. When the satisfaction is confirmed, the operation is allowed to be executed and an operation instruction is generated. The operation execution module is used to receive operation instructions and control the operation device to perform read and write operations on the RFID tags of the target assets.

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