Asset object management system

Abstract

The invention discloses an asset object management system, which is characterized in that an electronic tag is arranged on a managed asset object, after the electronic tag transmits a positioning signal, a base station receives the signal and sends the signal to a cloud server, and the cloud server combines the positioning signal sent by the base station and the position information of the base station to manage the asset object. And determining the position and the state of the asset object. Wherein the electronic tag adopts a specified frequency band to transmit a preset number of positioning signals so as to increase the probability that the positioning signals of the electronic tag are received, and the base station is provided with at least two signal receiving antennas with a preset polarization angle difference. And the number of positioning signals which can be received at the same time can be effectively increased. According to the scheme, it is ensured that the cloud server effectively manages the assets attached with the electronic tags, the positions and states of the asset objects can be determined in time according to the positioning signals of the electronic tags, and the management efficiency of the asset objects is greatly improved.

Description

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 18, 2025, with application number 202511001790.X and invention name “A Asset Object Management System”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of Internet of Things technology, and in particular to an asset object management system. Background Art

[0003] Assets used to carry delivered items, such as pallets, can be recycled. Therefore, asset information management is essential for asset owners. However, existing technologies still rely heavily on manual data entry, which not only consumes significant manpower and time, but is also prone to data deviations due to human error, resulting in inefficient management and an inability to accurately and timely understand the real-time status of assets. This can lead to asset loss, idleness, and waste.

[0004] Therefore, how to effectively improve the management efficiency of asset objects has become an urgent problem to be solved. Summary of the Invention

[0005] This application provides an asset object management system to improve the management efficiency of asset objects.

[0006] An embodiment of the present application provides an asset object management system, comprising: at least one electronic tag, which is provided on an asset object to be managed, the asset object being an object used to carry items to be delivered, the electronic tag using a designated frequency band to transmit a preset number of positioning signals, the designated frequency band being at least one frequency band included in the radio frequency range; at least one base station provided with at least two signal receiving antennas, which is used to receive the positioning signal transmitted by the at least one electronic tag, and send the received positioning signal to a cloud server at a preset time interval; there is a preset polarization angle difference between the two signal receiving antennas; the cloud server is used to obtain the positioning signal sent by the at least one base station, and determine the position and status of the asset object based on the positioning signal sent by the base station and the location information of the base station.

[0007] Optionally, the positioning signal includes identification information of the electronic tag and identification information of the asset object corresponding to the electronic tag; the base station receives the positioning signals emitted by all electronic tags located within a preset distance range of the base station through the at least two signal receiving antennas; based on the identification information of the electronic tag and the identification information of the asset object corresponding to the electronic tag, analyze whether the positioning signals received by the at least two signal receiving antennas of the base station respectively contain the same positioning signal; if so, deduplicate the positioning signals received by the at least two signal receiving antennas, and send the deduplicated positioning signals to the cloud server.

[0008] Optionally, the at least two signal receiving antennas included in the base station include an X-axis signal receiving antenna and a Y-axis signal receiving antenna, which respectively receive the positioning signal emitted by the electronic tag through the X-axis signal receiving antenna and the Y-axis signal receiving antenna; there is a preset polarization angle difference of 90 degrees between the two signal receiving antennas.

[0009] Optionally, the designated frequency band is a frequency band obtained after encrypting the 2.4GHz radio frequency band, and the electronic tag uses the designated frequency band to transmit a preset number of positioning signals, including at least three designated channels in the 2.4GHz radio frequency band sending positioning signals three times in sequence.

[0010] Optionally, the frequency band obtained after encrypting the 2.4GHz radio frequency band is used, and the positioning signal sent in each positioning signal sending period includes verification information of the positioning signal; after obtaining the positioning signal set sent by the base station, the cloud server detects the positioning signals in the positioning signal set, and queries the tampered positioning signal based on whether it contains the verification information, and determines the asset object corresponding to the tampered positioning signal as a suspected lost asset object.

[0011] Optionally, the cloud server is specifically used to obtain multiple positioning signals sent by at least one base station within a first preset time period; establish a location information set of the electronic tag corresponding to the positioning signal within the first preset time period based on the multiple positioning signals and the location information of the base station; if the electronic tag corresponding to the positioning signal indicates that the location information of the electronic tag is the same location in the location information set within the first preset time period, and the asset object corresponding to the electronic tag is an active asset, it means that the asset object carrying the electronic tag is in an idle state; and the information of the asset object in the idle state is sent to the asset object management platform.

[0012] Optionally, the cloud server obtains the location information of the target asset object in the following manner: querying the positioning signals sent by the target electronic tag carried by the target asset object among the positioning signals obtained from the multiple base stations; determining the location information of the target asset object based on the distance information between the multiple base stations and the target electronic tag, and the positional relationship between the multiple base stations.

[0013] Optionally, the cloud server obtains information that the target asset object is in a missing state in the following manner: comparing the current positioning signal set obtained in the current positioning signal reception period with the positioning signals corresponding to each managed target asset object in the preset asset management record, obtaining the missing positioning signal that exists in the asset management record but is missing in the current positioning signal set, and reporting the target electronic tag and target asset object corresponding to the missing positioning signal as a suspected lost asset object.

[0014] Optionally, the cloud server analyzes and processes the suspected lost asset object in the following manner: tracing the suspected loss location and suspected loss time of the suspected lost asset object to obtain the suspected loss location and suspected loss time of the suspected lost asset object; analyzing the loss probability of the suspected lost asset object based on the suspected loss location and suspected loss time of the suspected lost asset object; if the loss probability of the suspected lost asset object is higher than a predetermined loss probability threshold, the suspected lost asset object is used as a target lost asset object, and the identification information of the target lost asset as well as the loss time and loss location are reported.

[0015] Optionally, the cloud server analyzes and processes the suspected lost asset object in the following manner: obtaining information of the matching signal sending base station corresponding to the suspected lost asset object; if in the current signal receiving period, the signal strength of other positioning signals sent by the matching signal sending base station is lower than a preset signal strength threshold, it indicates that the matching signal sending base station is an unqualified base station; adjusting the unqualified base station, obtaining the positioning signal sent by the adjusted base station in the next positioning signal receiving period, if the suspected lost asset object exists, it indicates that the suspected lost asset object is not lost, if not, it indicates that the suspected lost asset object is lost, and the suspected lost location and suspected lost time of the suspected lost asset object are reported.

[0016] Optionally, the cloud server analyzes and processes the suspected lost asset object in the following manner: obtaining information of the matching signal sending base station corresponding to the suspected lost asset object; if in the current signal receiving period, the signal strength of other positioning signals sent by the matching signal sending base station is higher than a preset signal strength threshold, analyzing the historical usage trajectory of the suspected lost asset object; if the historical positioning signal strength corresponding to the suspected lost asset object in the historical usage trajectory of the suspected lost asset object is higher than the preset signal strength threshold, further obtaining and judging whether there is a positioning signal corresponding to the suspected lost asset object in the positioning signal of at least one signal receiving period within a second preset time period after the current positioning signal receiving period; if there is, it indicates that the suspected lost asset object is not lost; if not, it indicates that the suspected lost asset object is lost, and the suspected loss location and suspected loss time of the suspected lost asset object are reported.

[0017] Optionally, the cloud server analyzes and processes the suspected lost asset object in the following manner: obtains the type of items to be delivered carried by the suspected lost asset object; if the type of items to be delivered is cold chain items, obtains the ambient temperature of the environment in which the suspected lost asset object is currently located; if the ambient temperature is lower than a preset temperature threshold, waits for the ambient temperature to recover above the temperature threshold, re-obtains a set of positioning signals emitted within a preset receiving period after the temperature has recovered, and searches for a positioning signal corresponding to the suspected lost asset object; if so, it indicates that the suspected lost asset object is not lost; if not, it indicates that the suspected lost asset object is lost, and the suspected loss location and suspected loss time of the suspected lost asset object are reported; if the ambient temperature exceeds a third preset time and cannot recover to the preset temperature threshold, the suspected lost asset is classified into a category that may not be able to send signals normally due to ambient temperature reasons and is reported.

[0018] Optionally, the electronic tags carried by the asset objects within the preset range of the base station include a first type of electronic tags and a second type of electronic tags, the installation angle of the transmitting antenna of the first type of electronic tags is perpendicular to the installation angle of the transmitting antenna of the second type of electronic tags, and the difference between the number of the first electronic tags and the number of the second electronic tags is less than a preset difference threshold.

[0019] Compared with the prior art, this application has the following advantages: The asset object management system provided by this application sets an electronic tag on the asset object being managed. After the electronic tag transmits a positioning signal, the signal is received by the base station and sent to the cloud server. The cloud server combines the positioning signal sent by the base station and the base station's own location information to determine the location and status of the asset object. In this process, the electronic tag uses a specified frequency band to transmit a preset number of positioning signals to increase the probability of the electronic tag's positioning signal being received. The base station is equipped with at least two signal receiving antennas with preset polarization angle differences. This configuration can avoid missing signals while effectively increasing the number of positioning signals that can be received at the same time. Through the electronic tag's signal transmission method and the base station's dual-polarization antenna configuration, the base station greatly improves the accuracy of receiving the positioning signals of all electronic tags within its signal reception range, and allows more electronic tags to be placed within the reception range. Furthermore, this solution ensures that the cloud server effectively manages assets attached with electronic tags and can promptly determine the location and status of asset objects based on the electronic tag's positioning signal, greatly improving the efficiency of asset object management. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of an asset object management system provided by an embodiment of the present application; Figure 2 This is a flowchart of a method for a cloud server to determine the location of a target asset object provided by an embodiment of the present application; Figure 3 This is a flowchart of the corresponding method for the cloud server to determine the idle status of an asset object provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of the present application. Therefore, the present application is not limited to the specific implementations disclosed below.

[0022] It should be noted that the terms "first", "second", "third", etc. in the claims, description and drawings of the present application are used to distinguish similar objects and are not used to describe a specific order or sequence. The data used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than that illustrated or described herein. In addition, the terms "including", "having" and their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] It should be understood that in the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship. "Including A, B and / or C" means including any one, any two, or any three of A, B, and C.

[0024] It should be understood that in the embodiments of the present application, "B corresponding to A," "B corresponding to A," "A corresponds to B," or "B corresponds to A" means that B is associated with A and B can be determined based on A. Determining B based on A does not mean determining B based solely on A; B can also be determined based on A and / or other information.

[0025] The present invention provides an asset object management system to improve the management efficiency of asset objects, which is described in detail below.

[0026] In order to more clearly present the asset object management system provided in the embodiment of the present application, a detailed description is given below using a specific scenario in warehousing and logistics management as an example.

[0027] In the daily management of warehousing and logistics, core tools for carrying items to be delivered, such as pallets, are considered important assets due to their reusability. A large number of pallets are frequently used in the transportation of items in and out of the warehouse. When goods are delivered to the warehouse, they need to be temporarily stored on pallets. Before delivery, scattered items are stacked together using pallets and then transferred to transport vehicles. During this process, managers need to have real-time information on the location, load status, and flow trajectory of each pallet. For example, they need to know whether the pallets corresponding to a batch of goods have entered the outbound area, the number and storage location of idle pallets, and whether pallets that have not been moved for a long time are damaged or lost. This information directly affects warehouse scheduling efficiency and the timeliness of goods delivery.

[0028] Based on this, this application proposes an asset management system. It aims to provide timely and accurate positioning of assets in warehouse logistics management, assisting with asset usage and maintenance management and effectively improving asset management efficiency. As items enter and exit the warehouse, electronic tags are placed on the sides or bottoms of the assets carrying the items. The chips embedded in the tags are pre-programmed with the pallet's unique identifier (e.g., serial number, specifications, and other basic information). The electronic tags continuously transmit a preset number of positioning signals at a designated frequency band. Base stations deployed in different areas of the warehouse (e.g., incoming, storage, outgoing, and aisle corners) capture these signals using dual-polarized receiving antennas (with two antennas having preset polarization angle differences). Even in storage areas with densely stacked pallets, the frequency band design of the electronic tags and the polarization differences of the base station antennas effectively prevent interference between multiple tag signals, ensuring stable signal reception. The base stations aggregate the received signals at preset intervals (e.g., every 15 minutes) and transmit them to a cloud server. The cloud server accurately calculates the real-time location of each pallet based on the positioning signals received from each base station, combined with data such as the base station's location coordinates and signal strength. This helps managers log into the cloud system through terminal devices (such as computers and tablets) and view the distribution trajectory and status tags of all pallets in real time. For example, when the system detects that a batch of pallets of goods to be shipped has remained in the incoming warehouse for longer than a preset time, it will automatically issue an early warning to remind dispatchers to arrange for timely transfer. For long-term idle pallets, the system can count their number and location to facilitate rapid deployment to the required area. If the electronic tag signal of a pallet is abnormal (such as low battery), the system will push a maintenance reminder to ensure the continued normal use of the pallet. In this way, asset objects in the warehousing and logistics management process can be located in a timely and accurate manner to assist in the management of asset use and maintenance, effectively improving the efficiency of asset management.

[0029] The following combination Figure 1 The asset object management system and signal processing process provided by the embodiments of the present application are specifically described.

[0030] Please refer to Figure 1 , which is a structural block diagram of an asset object management system provided by an embodiment of the present application. The following is a detailed introduction and description of the asset object management system provided by the present application through the embodiment of the present application.

[0031] The asset object management system 100 includes: at least one electronic tag 101, at least one base station 102 and a cloud server 103. The electronic tag 101 is installed on the managed asset object, which is an object used to carry items to be delivered. The electronic tag uses a specified frequency band to transmit a preset number of positioning signals. The specified frequency band is at least one frequency band included in the radio frequency range.

[0032] The electronic tag 101 is an electronic device with a built-in wireless communication chip and antenna. It can exchange data with the base station 102 by transmitting radio signals. The transmitted signal contains the electronic tag's ID and the asset's ID. Electronic tags are divided into passive tags and active tags. Passive tags do not require batteries and have a short communication range (usually less than 10 meters). Active tags have a built-in battery and can actively transmit signals, allowing for longer communication ranges (up to 100 meters).

[0033] In this embodiment of the present application, an electronic tag 101 can be attached to an asset object to be managed and transmit a positioning signal to a base station 102 to implement functions such as identification, tracking, and positioning of the attached object. The asset object is an object used to carry items to be delivered, such as a pallet, a wheeled cart, a plastic frame, or other device capable of carrying items.

[0034] When using an electronic tag for signal transmission, in this embodiment of the present application, a predetermined number of positioning signals are transmitted using a designated frequency band, where the designated frequency band is at least one frequency band within the radio frequency range. The electronic tag transmits the predetermined number of positioning signals using the designated frequency band, specifically by cyclically transmitting positioning signals three times on at least three designated channels within the 2.4 GHz radio frequency band. The electronic tag transmits positioning signals three times on three unrestricted 2.4 GHz channels: channel 1 (2.412 GHz), channel 6 (2.437 GHz), and channel 11 (2.462 GHz). This results in each electronic tag transmitting positioning signals nine times to the base station. When the electronic tag transmits positioning signals simultaneously on these three channels, even if one channel is attenuated due to environmental interference (e.g., other wireless devices in the warehouse) or obstruction, the remaining channels can maintain stable transmission, greatly increasing the probability of successful positioning signal reception. For example, in a densely packed warehouse area, if channel 6 is temporarily occupied by a forklift's wireless communication, the electronic tag's signals transmitted on channels 1 and 11 can still be captured by the base station. As can be seen, the method used in the present application to transmit a preset number of signals in a designated frequency band can reduce the impact of such interference and ensure that the signal transmitted by each electronic tag can be received by the base station, thereby providing a reliable data foundation for subsequent positioning and management. In addition, the system uses a dedicated 2.4GHz frequency band to transmit signals. This frequency band is relatively independent and can effectively avoid interference with public frequency bands such as Wi-Fi and Bluetooth, further improving the stability of signal transmission.

[0035] It should be noted that due to the dense equipment and complex signal environment within warehouses, traditional unencrypted signals are susceptible to interference and tampering during transmission, resulting in the base station receiving erroneous information and affecting the subsequent determination of the asset's location and status. Therefore, in the embodiments of the present application, the electronic tag transmits a positioning signal using a designated frequency band. The designated frequency band is obtained by encrypting the 2.4 GHz radio frequency band. Specifically, the 2.4 GHz positioning signal is encrypted using the AES (Advanced Encryption Standard) symmetric encryption algorithm, ensuring that the positioning signal transmitted during each positioning signal transmission period contains verification information for the positioning signal. After receiving the positioning signal set transmitted by the base station, the cloud server detects the positioning signals in the set and, based on whether the verification information is included, identifies any tampered positioning signals and identifies the asset corresponding to the tampered positioning signal as a suspected lost asset. This ensures the legitimacy of the transmitted signal and the authenticity and reliability of the data received by the cloud server, providing a strong guarantee for accurately determining the asset's location and status. The AES symmetric encryption algorithm uses the same key for encryption and decryption, resulting in high computational efficiency and low hardware resource consumption, making it ideal for small devices with limited computing power, such as electronic tags. The key can be pre-written to the electronic tag by the base station, and regular key updates can further enhance signal transmission security. Of course, other methods can also be used to encrypt signal data in the 2.4 GHz band, and this embodiment of the application does not limit this.

[0036] The base station 102 is provided with at least two signal receiving antennas for receiving the positioning signal transmitted by the at least one electronic tag and sending the received positioning signal to the cloud server at a preset time interval; there is a preset polarization angle difference between the two signal receiving antennas.

[0037] The base station 102 includes a fixed base station and a movable base station.

[0038] The fixed base station is set in the warehouse and can receive signals from electronic tags that are within a preset distance range (for example, the preset distance range can be within 100 meters) from its own location, and an antenna for receiving signals is set on the base station 102.

[0039] The movable base station is set on a movable transportation equipment, such as an automated guided vehicle (AGV), a logistics vehicle on the road, etc. This type of base station includes a GPS positioning function.

[0040] In this embodiment of the present application, base station 102 receives positioning signals emitted by electronic tag 101 via a receiving antenna and then transmits the received signals to cloud server 103 at preset intervals. The fixed base station is primarily responsible for receiving and transmitting signals from assets within the warehouse, while the mobile base station, with its GPS positioning function, is used to locate assets (e.g., pallets) on transport equipment during transportation. This broadens the scope of asset management and enables tracking of assets during transportation.

[0041] In one embodiment of the present application, the at least two signal receiving antennas included in the base station 102 include an X-axis signal receiving antenna and a Y-axis signal receiving antenna, which respectively receive the positioning signal emitted by the electronic tag through the X-axis signal receiving antenna and the Y-axis signal receiving antenna; there is a preset polarization angle difference of 90 degrees between the two signal receiving antennas.

[0042] This dual-polarized antenna design allows for signal reception. Antennas with different polarization directions can adapt to signal direction deviations caused by different installation angles and asset placement angles of electronic tags. For example, when a pallet is tilted in a warehouse, the direction of the electronic tag's transmitted signal may be between horizontal and vertical. The dual-polarized antenna can capture horizontal and vertical signals separately, avoiding signal loss due to directional deviations of the transmitted signal. At the same time, in a warehouse environment with dense cargo, objects such as metal shelves and containers are prone to signal reflections, forming a multipath effect. The characteristics of reflected signals in different polarization directions vary. The dual-polarized antenna can receive these signals simultaneously, effectively offsetting the signal attenuation or phase cancellation problems caused by multipath interference, significantly improving the stability and integrity of signal reception.

[0043] In one embodiment of the present application, the electronic tags carried by assets within a preset range of the base station 102 are divided into a first category and a second category. The transmitting antennas of the first category are installed at a perpendicular angle to the transmitting antennas of the second category, and the difference between the number of the first and second electronic tags is less than a preset difference threshold (e.g., no more than 5% of the total number). This design further optimizes the effectiveness of dual-polarized antennas. For example, in a warehouse scenario where goods are densely stacked, if a large number of electronic tags transmit signals in a single direction, one of the base station antennas may be overloaded while the other is idle. By balancing the two categories of tags, the signal reception of the X-axis and Y-axis antennas can be balanced, avoiding resource waste. This also ensures that assets placed at different angles can be stably identified, ensuring that the base station has full signal coverage for all assets in the densely packed area.

[0044] Therefore, the dual-polarized antenna design with a 90-degree polarization difference and the balanced configuration of the two types of electronic tags in the embodiment of the present application jointly improve the base station's signal reception capability, anti-interference performance and positioning accuracy in complex environments, providing reliable technical support for asset management.

[0045] In addition, in an embodiment of the present application, since the base station receives the positioning signals emitted by all electronic tags located within a preset distance range of the base station through the at least two signal receiving antennas; therefore, based on the identification information of the electronic tag and the identification information of the asset object corresponding to the electronic tag, it is analyzed whether the positioning signals received by the at least two signal receiving antennas of the base station respectively contain the same positioning signal. If so, the positioning signals received by the at least two signal receiving antennas are deduplicated, and the deduplicated positioning signals are sent to the cloud server.

[0046] It should be noted that because base station 102 includes at least two signal receiving antennas (e.g., X-axis and Y-axis antennas), when receiving positioning signals transmitted by electronic tags, the same set of positioning signals from the same electronic tag may be received repeatedly due to overlapping coverage areas of the base stations or signal reflection. In this case, base station 102 can perform a precise comparison based on the electronic tag identification information (unique ID) and asset object identification information (e.g., pallet number) contained in the positioning signal. If the two types of identification are completely consistent in the signals received by the two antennas, and the difference in the signal transmission timestamps is within a preset threshold, the signal is determined to be a duplicate. Base station 102 retains the signal with the highest signal strength, removes duplicate data, and then sends the deduplicated signal packets to the cloud server at preset time intervals. The dual-polarized antenna design in the embodiments of the present application is intended to improve signal reception integrity, but it may also result in redundant data due to multipath effects. Local deduplication at the base station can reduce invalid data transmission by approximately 30%-50%, reducing the processing pressure on the cloud server and avoiding positioning calculation errors caused by duplicate signals.

[0047] The cloud server 103 is configured to obtain a positioning signal sent by the at least one base station, and determine the location and status of the asset object based on the positioning signal sent by the base station and the location information of the base station.

[0048] The cloud server 103 serves as the data processing and management center of the asset object management system, receives the positioning signal sent from the base station 102, and performs corresponding processing and analysis to provide it to management personnel for asset management.

[0049] In the embodiment of the present application, after receiving the positioning signal sent by the base station 102, the cloud server 103 first pre-processes all the received signal data. These positioning signals cover all data of the fixed base station and the movable base station within a specific time period. The location information of the fixed base station is the precise coordinates in the warehouse pre-entered into the system (such as the coordinates of the fixed base station in a certain shelf area (X, Y, Z = 10m, 5m, 3m)), while the location information of the movable base station is obtained in real time through its built-in GPS positioning module. The base station and the electronic tag are both on the transport vehicle. The base station position sent by the base station changes each time, and the position of the electronic tag is determined based on the changing base station position.

[0050] When determining the location and status of an asset object, the cloud server 103 combines the received positioning signals with the base station's own location information to determine the location of the electronic tag. Ideally, when the electronic tag signals of all target asset objects are fully received by the base station, the current positioning signal set includes the positioning signals received by all base stations during that time period, including fixed and mobile base stations. For example, in a warehouse, the signal emitted by a single electronic tag may be received by multiple base stations. Based on the multiple sets of base station signal data corresponding to each electronic tag, the cloud server uses triangulation or fingerprint matching algorithms to generate the precise coordinates of the asset and updates them in real time to the management interface for management personnel to query. However, in actual applications, factors such as the complexity of the warehouse environment and equipment failures may make it difficult to fully achieve the ideal positioning scenario. The asset object management system of this application fully considers the situations that may arise under non-ideal conditions. For example, if the positioning signal of an asset object is not captured by any base station for multiple consecutive time periods (e.g., three preset time intervals), the system will trigger a "suspected loss" warning mechanism. At this point, the cloud server automatically retrieves the asset's historical trajectory data (such as its last seen location and associated transport vehicle information) and verifies it against auxiliary information such as warehouse inbound and outbound records and the GPS path of the mobile base station. For example, if a pallet's last signal appears at the warehouse exit and there's a transport vehicle exit record during the corresponding period, the system will prioritize its normal transport status. If its historical trajectory shows it remaining in a certain shelf area for an extended period with no movement history, but then suddenly loses signal, this could indicate physical loss or a faulty electronic tag. An alert will be immediately sent to management personnel, and the time, location, and associated information of the loss will be automatically recorded for easy tracing.

[0051] Through the collaborative work of the above-mentioned devices, the asset object management system provided in the embodiment of the present application can provide managers with comprehensive and real-time asset object trajectory tracking, and avoid risks such as loss and idleness in advance through an early warning mechanism, thereby realizing effective tracking and management of asset objects.

[0052] Please refer to Figure 2, which is a flow chart of the method for the cloud server to determine the location of the target asset object provided in the embodiment of the present application. Figure 2 In the example, the cloud server determines the specific location of the target asset object through the following steps: Step S201: querying the positioning signals transmitted by the target electronic tag carried by the target asset object from among the positioning signals transmitted by the multiple base stations; Step S202: Determine the location information of the target asset object according to the distance information between the multiple base stations and the target electronic tag, and the position relationship between the multiple base stations.

[0053] The cloud server 103 can implement step S202 in the following manner to determine the specific location information of the electronic tag. Specifically: Using Bluetooth positioning signals, the tag's location is estimated using the RSSI (Received Signal Strength Indication) of the signals received from multiple base stations, for example, using trigonometric positioning. Specifically, the distance between the electronic tag transmitting the signal and the base station receiving the signal is calculated using a logarithmic distance path loss model; the logarithmic distance loss model can be referenced by the following expression 1: Expression 1 in, Indicates the distance between the base station and the signal transmitter. The signal strength of the positioning signal received by the base station at the time Indicates reference distance The signal strength at the location is obtained from actual testing. represents the distance to be sought, Indicates the reference distance between the electronic tag and the base station (usually 1 meter). represents the path loss exponent, represents Gaussian random noise.

[0054] The above-mentioned logarithmic distance loss model can deduce the distance between the electronic tag transmitting the signal and the base station receiving the signal based on the received signal strength. The distance calculation can refer to the following expression 2: Expression 2 Then, by calculating the distance from the tag to be located to three base stations with known coordinates, the coordinates of the tag to be located are solved using geometric relationships. If more than three base stations with known coordinates receive signals from the same tag, the least squares method is used to fit the optimal solution for the tag to be located, improving the tag's positioning accuracy.

[0055] In addition, in another embodiment, the angle-assisted positioning AOA (Angle of Arrival) algorithm can also be used to determine the target position based on the angle at which the wireless signal arrives at the receiver. When a signal is sent from a transmitter and received simultaneously by multiple antennas of a receiver, a phase difference will occur due to the different lengths of the signal paths reaching each antenna. By measuring these phase differences and using relevant formulas and geometric relationships, the angle of arrival of the signal can be calculated. Combined with the known receiver position, the position of the signal source can be determined through methods such as triangulation. Among them, the calculation of the AOA arrival angle can refer to the following expression 3: Expression 3 in, represents the angle of arrival, It represents the phase difference of the signals received by the two antennas. Indicates the antenna spacing.

[0056] In addition, the RSSI signal strength and AOA angle measurement methods can be combined and applied to the complex indoor scenes of warehouses in the embodiment of this application. Among them, AOA provides directional angle measurement, and RSSI supplements signal coverage to improve the distance measurement accuracy in dense areas. The positioning accuracy calculated by this fusion algorithm is less than 1 meter. refer to Figure 3 , which is the cloud server provided in the embodiment of the present application, determines whether the asset object is in an idle state through the following steps: S301: The cloud server is specifically configured to obtain multiple positioning signals sent by at least one base station within a first preset time period; S302: Establishing a location information set of the electronic tag corresponding to the positioning signal within the first preset time period based on the multiple positioning signals and the location information of the base station; S303: If the electronic tag corresponding to the positioning signal indicates that the location information of the electronic tag is the same in the location information set within the first preset time period, and the asset object corresponding to the electronic tag is an active asset, it indicates that the asset object carrying the electronic tag is in an idle state; S304: Send information about idle asset objects to the asset object management platform.

[0057] By identifying idle assets, this embodiment of the present application allows managers to promptly allocate them to areas in need. For example, when Warehouse C urgently needs pallets due to the arrival of new goods, the asset object management system can automatically retrieve idle pallets from Warehouse B and dispatch a transport vehicle to transfer them to Warehouse C, avoiding resource waste due to information lags and improving pallet turnover. Furthermore, long-term idle pallets occupy limited storage space, and the asset object management system can promptly clear out the backlog through continuous monitoring. For example, pallets carrying fast-moving consumer goods (such as food and daily necessities) typically have a storage cycle of no more than 48 hours from entry to exit. The system will mark these pallets as "dynamic circulation." If such pallets remain idle for more than 72 hours, the system will identify them as "abnormally idle" and immediately send an alert to the management platform, prompting managers to move them to a dedicated temporary storage area, freeing up space in core operational areas. Pallets carrying certain specialized commodities (such as industrial raw materials and seasonal reserves) may require storage periods of up to 30 days or even longer. The system will mark these pallets as "static storage," and the alert time will be dynamically adjusted based on the cargo's properties. Furthermore, when transferring goods across warehouses, the cloud server aggregates idle pallet data from each warehouse to enable global resource allocation. For example, if the logistics center discovers through the asset object management system that a warehouse in City A has 100 idle pallets, while a warehouse in City B is short of 80 pallets, it can directly arrange for vehicle transfer, avoiding duplicate purchases and effectively improving asset object management efficiency.

[0058] Therefore, the above-mentioned solution for determining idle pallets effectively solves the problems of low asset utilization and delayed scheduling in traditional warehousing, and provides technical support for refined asset management.

[0059] In one embodiment of the present application, the cloud server confirms the current status of each asset object through the following series of methods, including: The current positioning signal set obtained during the current positioning signal reception period is compared with the positioning signals corresponding to each managed target asset object in the preset asset management record. If a missing positioning signal is found that is present in the asset management record but missing from the current positioning signal set, the target electronic tag and target asset object corresponding to the missing positioning signal are reported as a suspected lost asset object. The current positioning signal set obtained for the current positioning signal reception period (e.g., a 10-minute period) includes the total valid positioning signals received by all fixed base stations within the warehouse during that period, as well as the total valid positioning signals received by all mobile base stations during that period. The preset asset management record is a basic information database for all target asset objects registered in the system. Ideally, the current positioning signal set should cover all assets in the asset management record. If an asset is found in the record but not in the current signal set, it indicates that the asset may be in an abnormal state (e.g., lost, signal failure, mistakenly removed, etc.). This comparison can promptly detect such anomalies and prevent asset loss. During the comparison process, the cloud server extracts the IDs of all electronic tags from the current positioning signal set and the corresponding electronic tag IDs of all registered assets from the asset management records. Using set operations, the server identifies missing positioning signals that exist in the asset management records but are missing from the current positioning signal set. Finally, the corresponding electronic tag IDs and their associated assets are reported to the management platform.

[0060] After determining that there is indeed a missing positioning signal in the current positioning signal set obtained in the current positioning signal reception period, the suspected lost asset object is further analyzed and processed.

[0061] First, in an embodiment of the present application, the suspected loss location and suspected loss time of the suspected lost asset object are traced to obtain the suspected loss location and suspected loss time of the suspected lost asset object; the loss probability of the suspected lost asset object is analyzed based on the suspected loss location and suspected loss time of the suspected lost asset object; if the loss probability of the suspected lost asset object is higher than a predetermined loss probability threshold, the suspected lost asset object is used as a target lost asset object, and the identification information of the target lost asset as well as the loss time and loss location are reported. Specifically, when the calculated loss probability is higher than the loss probability threshold, the system marks the asset object as a "target lost asset object" and automatically executes the reporting process, including: packaging its identification information (asset ID, electronic tag ID), suspected loss location, loss time, loss probability and traceability analysis results, and pushing them to the terminal device of the manager (such as a computer client, mobile phone APP), while generating a loss record in the system background and entering it into the asset anomaly management module. Therefore, for reported lost assets, managers can quickly check based on the traceability information provided by the system: if the suspected lost location is in the warehouse, personnel can be dispatched immediately to the site for verification; if the asset is in transit, the driver can be contacted in time to check the status of the asset in the car. In actual application, this can greatly shorten the investigation time.

[0062] On the other hand, if the probability of loss of the asset object is not higher than the predetermined loss probability, further analysis is required to determine whether other reasons are affecting the detection signal and causing the misjudgment. The following is a detailed analysis of the reasons for the suspected loss of the asset object: The first scenario: In asset object management, when the system detects that the positioning signal of an asset object is "suspected to be lost," it first checks to see if it is caused by a base station anomaly. This type of situation is quite common in actual warehouse environments. For example, the No. 3 fixed base station in Warehouse Area A has unstable power supply due to poor line contact, resulting in a sudden drop in signal transmission power, which makes it impossible to properly receive the electronic tag signals of pallets within its coverage area. The specific handling methods for this situation are as follows: Obtain information of the matching signal sending base station corresponding to the suspected lost asset object; if in the current signal reception period, the signal strength of other positioning signals sent by the matching signal sending base station is lower than the preset signal strength threshold, it indicates that the matching signal sending base station is an unqualified base station; adjust the unqualified base station, and obtain the positioning signal sent by the adjusted base station in the next positioning signal reception period. If the suspected lost asset object exists, it indicates that the suspected lost asset object is not lost; if not, it indicates that the suspected lost asset object is lost, and the suspected loss location and suspected loss time of the suspected lost asset object are reported.

[0063] Among them, the matching signal sending base station corresponding to the suspected lost asset object refers to the base station that last stably received the positioning signal sent by the electronic tag corresponding to the suspected lost asset object before the current positioning signal reception period, or the base station that has received the positioning signal of the asset object for a long time and frequently in history (usually the base station corresponding to the last valid reception record is the priority judgment standard). Specifically, each managed asset object (such as a pallet) is bound to a unique electronic tag, which periodically sends positioning signals to surrounding base stations. The system records information on each signal interaction, including "which base station received the signal of the tag", "reception time", "signal strength", etc. When an asset object is judged to be "suspected lost" (its signal is not received in the current period), the system will filter out one or more base stations that are most closely associated with the asset object from the historical records, that is, one or more base stations that successfully received its signal for the last time. These base stations are the "matching signal sending base stations."

[0064] Then, the signal strength of other positioning signals sent by the matching signal sending base station is detected. If its signal strength is lower than the preset signal strength threshold, it indicates that the matching signal sending base station is an unqualified base station. In this case, the signal of the suspected lost asset object may not be detected due to the current base station itself. At this time, the unqualified base station is adjusted, and the positioning signal sent by the adjusted base station in the next positioning signal reception period is obtained. If the suspected lost asset object exists, it indicates that the suspected lost asset object is not lost. If the suspected lost asset object still does not exist, it indicates that the suspected lost asset object may indeed be lost, and the suspected loss location and suspected loss time of the suspected lost asset object are reported.

[0065] The second situation: In asset object management, when the system detects that the positioning signal of an asset object is "suspected to be lost", it can further determine whether it is actually lost in combination with the historical usage trajectory of the asset object. For example, when the pallet numbered T001 in the warehouse is "suspected to be lost", its matching base station is the fixed base station No. 5 in the warehouse. After testing, the signal strength of other pallets received by the base station in the current period is stable at -65dBm (all higher than the preset threshold of -80dBm), indicating that the base station is working normally. At this time, the system retrieved the historical usage trajectory of pallet T001 and found that the positioning signal strength of the pallet has been higher than the preset threshold in the past 10 days. In the next 24 hours, the system will continue to monitor its positioning signal to eliminate signal interruptions caused by accidental factors. For this situation, the specific handling method is as follows: Obtain information of the matching signal sending base station corresponding to the suspected lost asset object; if in the current signal receiving period, the signal strength of other positioning signals sent by the matching signal sending base station is higher than the preset signal strength threshold, analyze the historical usage trajectory of the suspected lost asset object, and if the historical positioning signal strength corresponding to the suspected lost asset object in the historical usage trajectory of the suspected lost asset object is higher than the preset signal strength threshold, further obtain and judge whether there is a positioning signal corresponding to the suspected lost asset object in the positioning signal of at least one signal receiving period within a second preset time period after the current positioning signal receiving period, and if so, it indicates that the suspected lost asset object is not lost, and if not, it indicates that the suspected lost asset object is lost, and the suspected lost location and suspected lost time of the suspected lost asset object are reported.

[0066] The matching signal transmission base station corresponding to the suspected lost asset is similar to the matching signal transmission base station in the first scenario above and will not be further described here. The historical usage trajectory of the suspected lost asset refers to a dynamic record of the asset's entire lifecycle over a period of time (e.g., the last 30 days). This includes: the time and location of each positioning signal reception (corresponding to the base station coverage area); the strength and stability of each signal (whether there are frequent signal drops or interruptions); and the asset's movement path (e.g., from warehouse A to workshop B, from a transport vehicle to a storage area, etc.). Simply put, this is complete historical data on the asset's past appearances, signal stability, and movement trajectory. If the historical signal strength meets the requirements (indicating that the asset tag is functioning properly and the signal has been stable in the past), the possibility of the current signal loss being caused by a malfunction in the asset tag itself is ruled out, and further verification is required. In this case, the system must check whether the asset's signal can be received in at least one subsequent signal reception period (e.g., every 10 minutes) within a second preset period (e.g., within 8 hours) following the current positioning signal reception period. If the corresponding signal is received in the subsequent period, it means that the asset has only been temporarily not captured in the current period, and it will be judged as "not lost" and the suspected mark will be removed; if the corresponding signal is still not received in the subsequent period, it can be confirmed that the asset is lost, and the system will automatically report its "suspected loss location" (the last recorded location) and "suspected loss time" (the time when the signal is first lost in the current period).

[0067] In an embodiment of the present application, in the process of analyzing and processing the above-mentioned suspected lost asset objects, the setting of parameters such as the second preset time length also needs to consider the influencing factors of the category of items carried by the asset object. For example, if the pallet currently being monitored is a cold chain pallet for transporting fresh products, then under normal circumstances, the second preset time length is set to 2 hours. If the positioning signal is not received after the timeout, it is reported immediately to avoid the deterioration of goods due to time delays and cause losses. Therefore, when analyzing and processing the above-mentioned situation, the embodiment of the present application combines the characteristics of the items carried by the asset and dynamically sets the verification time length. While ensuring the accuracy of the judgment, it can also take into account the timeliness requirements of different scenarios, further improving the practicality and intelligence level of the asset management system.

[0068] In the third case, in asset object management, when the system detects that the positioning signal of an asset object is "suspected to be lost", it is also necessary to analyze the impact of environmental factors in the warehouse. For example, the normal operating temperature range of the electronic tag is -30℃ to 70℃. In a cold chain warehouse, the battery and RF module inside the electronic tag are sensitive to low temperatures. When the temperature is below -30℃, the battery activity decreases, which may cause a sudden drop in the transmission power. The signal modulation capability of the RF circuit will also be affected, making it impossible to send the positioning signal normally. For this situation, the specific handling method is as follows: Obtain the type of items to be delivered carried by the suspected lost asset object. If the type of items to be delivered is cold chain items, obtain the ambient temperature of the environment in which the suspected lost asset object is currently located. If the ambient temperature is lower than the preset temperature threshold, wait for the ambient temperature to recover above the temperature threshold, re-obtain the positioning signal set emitted by the positioning signal after the temperature is recovered within the preset receiving period, and search among them to see whether there is a positioning signal corresponding to the suspected lost asset object. If so, it indicates that the suspected lost asset object is not lost. If not, it indicates that the suspected lost asset object is lost, and the suspected loss location and suspected loss time of the suspected lost asset object are reported. If the ambient temperature exceeds the third preset time and cannot be restored to the preset temperature threshold, the suspected lost asset is classified as a category that may not be able to send signals normally due to ambient temperature reasons and is reported.

[0069] Among them, in order to obtain the ambient temperature of the environment in which the suspected lost asset object is currently located, the system can extract the location where the asset was last confirmed from the historical records (such as freezer No. 2 in area A of the cold chain warehouse). The location is pre-bound to a fixed temperature sensor (such as the temperature and humidity probe in the freezer). The system then calls the data of the temperature sensor at that location in real time to obtain the current ambient temperature. For example, the sensor of freezer No. 2 uploads data every 10 seconds, and the system can directly retrieve its latest record. By checking the temperature correlation to determine whether the signal loss of the suspected lost object is caused by abnormal ambient temperature, it can avoid misjudging assets caused by abnormal ambient temperature as lost, and promote timely maintenance of the cold chain environment through the classification reporting mechanism. While ensuring the accuracy of asset positioning, it also takes into account the storage safety of cold chain items.

[0070] In the embodiments of this application, the loss probability is assessed using the aforementioned multi-dimensional influencing factors, avoiding false alarms caused by brief signal interruptions and reducing ineffective management work. The system initiates analysis immediately upon signal interruption, enabling earlier identification of suspected loss locations compared to manual inspections (which can lag for hours), significantly increasing the probability of asset recovery. This application utilizes detailed traceability records and loss timestamps as the basis for analysis, providing a foundation for subsequent accountability determination, such as determining whether the asset loss occurred during storage or transportation. Furthermore, by analyzing data on frequently lost assets and high-risk areas, the system can provide targeted improvement recommendations, such as adding base stations in signal blind spots and installing dual electronic tags on high-value assets, thereby mitigating loss risk at the source. Therefore, through scientific traceability, quantitative probability assessment, and a precise reporting mechanism, this process achieves dynamic management and control of asset loss risk, avoiding blind warnings while ensuring timely handling of abnormal situations, providing comprehensive asset security.

[0071] Although the present application is disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

[0072] In a typical configuration, system devices include one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0073] Memory may include non-permanent storage in a computer-readable medium, in the form of random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0074] 1. Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented using any method or technology to store information. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change RAM (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), random access memory (RAM) of other types, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage media, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include non-transitory computer-readable media, such as modulated data signals and carrier waves.

[0075] 2. Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0076] Although the present application is disclosed as above with the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims of the present application.

Claims

1. An asset object management system, characterized in that: include: At least one electronic tag is mounted on a managed asset object, the asset object being an object used to carry items to be delivered, the electronic tag transmitting a preset number of positioning signals using a designated frequency band, the designated frequency band being at least one frequency band within a radio frequency range; At least one base station provided with at least two signal receiving antennas, configured to receive the positioning signal transmitted by the at least one electronic tag and transmit the received positioning signal to a cloud server at a preset time interval; a preset polarization angle difference exists between the two signal receiving antennas; The cloud server is used to obtain the positioning signal sent by the at least one base station, and determine the location and status of the asset object based on the positioning signal sent by the base station and the location information of the base station.

2. The system according to claim 1, wherein: The positioning signal includes identification information of the electronic tag and identification information of the asset object corresponding to the electronic tag; The base station receives positioning signals emitted by all electronic tags within a preset distance range of the base station through the at least two signal receiving antennas; based on the identification information of the electronic tags and the identification information of the asset objects corresponding to the electronic tags, the base station analyzes whether the positioning signals received by the at least two signal receiving antennas of the base station respectively contain the same positioning signal; if so, the positioning signals received by the at least two signal receiving antennas are deduplicated, and the deduplicated positioning signals are sent to the cloud server.

3. The system according to claim 2, characterized in that The at least two signal receiving antennas included in the base station include an X-axis signal receiving antenna and a Y-axis signal receiving antenna, which respectively receive the positioning signal emitted by the electronic tag through the X-axis signal receiving antenna and the Y-axis signal receiving antenna; there is a preset polarization angle difference of 90 degrees between the two signal receiving antennas.

4. The system according to claim 1, wherein: The designated frequency band is a frequency band obtained after encrypting the 2.4GHz radio frequency band. The electronic tag uses the designated frequency band to transmit a preset number of positioning signals, including at least three designated channels in the 2.4GHz radio frequency band sending positioning signals three times in sequence.

5. The system according to claim 4, characterized in that Using the frequency band obtained by encrypting the 2.4 GHz radio frequency band, the positioning signal sent in each positioning signal sending period includes verification information of the positioning signal; After obtaining the positioning signal set sent by the base station, the cloud server detects the positioning signals in the positioning signal set, queries the tampered positioning signals based on whether the verification information is contained therein, and determines the asset object corresponding to the tampered positioning signal as a suspected lost asset object.

6. The system according to claim 2, wherein: The cloud server is specifically configured to obtain multiple positioning signals sent by the at least one base station within a first preset time period; and establish a location information set of the electronic tag corresponding to the positioning signal within the first preset time period based on the multiple positioning signals and the location information of the base station; If the electronic tag corresponding to the positioning signal indicates that the location information of the electronic tag is the same location in the location information set within the first preset time period, and the asset object corresponding to the electronic tag is an active asset, it means that the asset object carrying the electronic tag is in an idle state; the information of the asset object in the idle state is sent to the asset object management platform.

7. The system according to claim 1, wherein: The cloud server obtains the location information of the target asset object in the following manner: Querying the positioning signals transmitted by the target electronic tag carried by the target asset object among the positioning signals transmitted by the multiple base stations; The location information of the target asset object is determined according to the distance information between the multiple base stations and the target electronic tags, and the position relationship between the multiple base stations.

8. The system according to claim 1, wherein: The cloud server obtains the information that the target asset object is in a missing state in the following manner: The current positioning signal set obtained during the current positioning signal reception period is compared with the positioning signals corresponding to the managed target asset objects in the preset asset management records, and the missing positioning signals that exist in the asset management records but are missing in the current positioning signal set are obtained. The target electronic tag and target asset object corresponding to the missing positioning signal are reported as suspected lost asset objects.

9. The system according to claim 8, characterized in that The cloud server analyzes and processes the suspected lost asset object in the following manner: Tracing the suspected loss location and suspected loss time of the suspected lost asset object to obtain the suspected loss location and suspected loss time of the suspected lost asset object; Analyzing the loss probability of the suspected lost asset object based on the suspected loss location and suspected loss time of the suspected lost asset object; If the loss probability of the suspected lost asset object is higher than a predetermined loss probability threshold, the suspected lost asset object is taken as a target lost asset object, and the identification information, loss time and loss location of the target lost asset are reported.

10. The system according to claim 8, wherein: The cloud server analyzes and processes the suspected lost asset object in the following manner: Obtain information of a matching signal sending base station corresponding to the suspected lost asset object; If, in the current signal reception period, the signal strength of other positioning signals sent by the matching signal sending base station is lower than the preset signal strength threshold, it indicates that the matching signal sending base station is an unqualified base station; Adjust the unqualified base station and obtain the positioning signal sent by the adjusted base station in the next positioning signal reception period. If the suspected lost asset object exists, it means that the suspected lost asset object is not lost; if it does not exist, it means that the suspected lost asset object is lost, and the suspected loss location and suspected loss time of the suspected lost asset object are reported.

11. The system according to claim 8, wherein: The cloud server analyzes and processes the suspected lost asset object in the following manner: Obtain information of a matching signal sending base station corresponding to the suspected lost asset object; If, in the current signal reception period, the signal strength of other positioning signals sent by the matching signal sending base station is higher than the preset signal strength threshold, the historical usage trajectory of the suspected lost asset object is analyzed. If the historical positioning signal strength corresponding to the suspected lost asset object in the historical usage trajectory of the suspected lost asset object is higher than the preset signal strength threshold, further acquisition and judgment are made as to whether there is a positioning signal corresponding to the suspected lost asset object in the positioning signals of at least one signal reception period within a second preset time period after the current positioning signal reception period. If there is, it indicates that the suspected lost asset object is not lost. If not, it indicates that the suspected lost asset object is lost, and the suspected loss location and suspected loss time of the suspected lost asset object are reported.

12. The system according to claim 8, wherein: The cloud server analyzes and processes the suspected lost asset object in the following manner: Obtaining the type of the item to be delivered carried by the suspected lost asset object; if the type of the item to be delivered is a cold chain item, obtaining the ambient temperature of the environment in which the suspected lost asset object is currently located; if the ambient temperature is lower than a preset temperature threshold, waiting for the ambient temperature to return to above the temperature threshold, re-obtaining a set of positioning signals transmitted within a preset receiving period after the temperature has recovered, and searching among them for a positioning signal corresponding to the suspected lost asset object; if so, it indicates that the suspected lost asset object is not lost; if not, it indicates that the suspected lost asset object is lost, and reporting the suspected loss location and suspected loss time of the suspected lost asset object; If the ambient temperature exceeds the third preset time period and cannot be restored to the preset temperature threshold, the suspected lost asset is classified as being unable to send signals normally due to ambient temperature reasons and reported.

13. The system according to claim 3, wherein: The electronic tags carried by the asset objects within the preset range of the base station include first-category electronic tags and second-category electronic tags, the installation angle of the transmitting antenna of the first-category electronic tags is perpendicular to the installation angle of the transmitting antenna of the second-category electronic tags, and the difference between the number of the first electronic tags and the number of the second electronic tags is less than a preset difference threshold.

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