CN114897117A

CN114897117A - Asset equipment positioning management system and method based on RFID

Info

Publication number: CN114897117A
Application number: CN202210617416.2A
Authority: CN
Inventors: 姚郭浩; 陈瑶; 谷春雨; 常浩天; 孙叶锋; 徐月仙; 张小玲; 汪亚君
Original assignee: Zhejiang Zhier Information Technology Co ltd
Current assignee: Zhejiang Zhier Information Technology Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-08-12

Abstract

The invention discloses an asset equipment positioning management system based on RFID, which comprises a plurality of RFID readers, RFID electronic tags on asset equipment and a plurality of RFID antennas, wherein the RFID antennas are used for transmitting radio frequency signals and receiving data sent by the RFID tags; the positioning management system further comprises a machine learning module, the positioning comparison module records the specific positioning of the asset and sends the specific positioning to the machine learning module, and the machine learning module updates the positioning data of the asset equipment. Meanwhile, the invention also discloses an asset equipment positioning management method based on the RFID by adopting the management system. The positioning management system and the positioning management method can quickly, efficiently and accurately position the specific position of the asset by establishing the positioning comparison module, and ensure that a user can quickly find the required asset.

Description

Asset equipment positioning management system and method based on RFID

Technical Field

The invention discloses an asset equipment positioning management system and a management method, and particularly relates to an asset equipment positioning management system and a method based on RFID.

Background

Fixed asset management is an important component in enterprise management, and fixed assets have the characteristics of large quantity, multiple types, high value, long service cycle, scattered use places and the like, and are difficult to manage. Many units still rely on the management mode of manual account keeping at present, and because the management document is numerous, the checking work is heavy, a large amount of manpower and material resources are required to be occupied, and the historical operation and the asset statistics work of fixed assets are abnormally difficult, the asset loss and the repeated purchase of assets are caused. In recent years, some fixed asset management software is provided, and the problem of manual accounting is solved to a great extent, but most systems adopt a manual mode to record data, so that the speed is low, errors are easy to generate, the serious problem that asset objects and account information are disconnected in asset management exists, and the requirement of modern enterprise management is difficult to meet.

Radio Frequency Identification (RFID) refers to the transmission of digital IDs and other data between RFID tags and readers/writers by electromagnetic waves in a wireless or contactless manner. The tagging entity allows businesses, organizations, and consumers to seamlessly identify, authenticate, track, detect, and interact with each item through a unique digital ID (digital twin). Unlike other automatic identification technologies such as optical two-dimensional codes, RFID can read tags within a line of sight range of several centimeters to more than 20 meters, depending on the type of RFID system. Typical examples are reading hundreds of tagged products in totes on pallets using a fixed reader-writer door installed behind the delivery area door, or scanning store shelves with a handheld reader, inventorying in seconds, and scanning luxury wallets with a smartphone, for example, to verify authenticity, and register for affiliation.

RFID technology has advantages in fixed asset management. The RFID technology can store a large amount of asset information, can directly determine important attributes of assets from digital codes, has the characteristics of certain water resistance, magnetism prevention, high temperature resistance and the like, is not easily influenced in humid, stained and worn environments, can encrypt information, can store the obtained information in a secret protection mode, needs to read or write data information by using professional equipment, is not easy to forge, has high safety, and ensures the stability of the application of the radio frequency identification technology; the RFID reading equipment can rapidly identify a plurality of targets within a distance of 1-20 m, asset checking personnel can automatically scan and check the asset equipment by only holding one asset checking reader to corresponding equipment for one circle, and research institution experiments show that the asset checking speed by adopting the RFID technology is 6.5 times faster than that of bar code checking and is 11 times faster than that of manual checking. By adopting the RFID technology, the fixed asset checking speed is increased, the daily dynamic management of the fixed assets is enhanced, and the working efficiency and the asset management level are greatly improved.

Currently, RFID technology is widely used in asset location management. Chinese patent application publication No. CN102568066A discloses a radio frequency identification system for in-out state identification, which includes at least two RFID card readers, a processing unit connected to the at least two RFID card readers, and a storage unit connected to the processing unit, wherein the at least two RFID card readers are disposed at an entrance and an exit and are disposed along a path of the entrance or the exit at a predetermined distance from each other. The processing unit judges the in-out state of the carrier of the RFID tag according to the reading state of the same RFID tag by at least two RFID readers and the history record stored in the storage unit. In the system, the RFID card readers are connected with the processing unit through 485 interfaces, so that a plurality of 485 lines need to be arranged on the plurality of RFID card readers, the arrangement is troublesome, and the wiring is complex; the processing unit and the storage unit are realized by one PC, a plurality of RFID card readers are needed, the number of devices is large, the cost is high, and the maintenance is not facilitated.

Chinese patent application publication No. CN108647756A discloses "an asset management system and method based on RFID tag", which can manage the state of fixed assets going out of a warehouse and entering the warehouse. This approach, however, does not address the problem of accurate positioning of fixed assets, resulting in inefficiencies and less accuracy in the management system.

Disclosure of Invention

In view of the above analysis, the present invention aims to provide an asset device positioning management system and method based on RFID, which solve the problems of low positioning accuracy, long positioning system time and low working efficiency in the current RFID asset positioning management system.

The purpose of the invention is mainly realized by the following technical scheme:

the invention discloses an asset equipment positioning management system based on RFID, comprising: the RFID electronic tag on the asset equipment stores corresponding information of an article and transmits the information RFID reader of the article when the RFID electronic tag is activated; the RFID antennas are used for transmitting radio frequency signals and receiving data sent by the RFID tags; the data center is used for storing historical data and latest acquired data of each asset device; the system comprises an application center, a database management module, a system management module, an alarm management module and an asset statistical query module, wherein the application center comprises an asset management module, a warehouse management module, a system management module, an alarm management module and an asset statistical query module; the positioning management system also comprises a positioning comparison module, and after the asset statistics query module receives a certain asset positioning query request, the positioning comparison module queries historical data of a data center, judges the most possible storage position of the asset equipment, selects a plurality of possible positioning positions and marks the positions; the positioning management system sends a signal to the antenna of the possible positioning position to search the asset of the asset positioning query request, and the maximum possibility of the position of the positioning management system is calculated by adopting a method of measuring and calculating the link signal strength between nodes and utilizing a wireless signal space transmission attenuation model to estimate the distance transmitted between the nodes; according to the maximum possibility of the position, video linkage is realized by combining a video monitoring function, and the exact position of the asset is determined; the positioning management system also comprises a machine learning module, the positioning comparison module records the specific positioning of the asset and sends the specific positioning to the machine learning module, and the machine learning module updates the positioning data of the asset equipment.

Further, the plurality of possible position fixes is no more than 5 possible position fixes. There may be 3 possible positioning locations.

Further, the positioning comparison module further comprises a user parameter setting module, wherein the user can set the coefficients of the possible positioning positions according to experience in the user parameter setting module, and the positioning comparison module preferentially searches the position with the maximum coefficient to determine whether the searched asset equipment exists. The coefficients are probability values that the user empirically reflects the location of the asset device being sought.

Furthermore, the asset management module comprises an asset information inputting module and an asset information maintaining module, wherein the asset information inputting module is used for completing the function of adding asset information and processing the distribution condition of assets when the assets are added, and the information required when the assets are added comprises an asset use department, a user, the type and model of the assets, a manufacturer, a delivery date, purchasing time and an asset physical photo; the asset maintenance record is used for maintaining asset information, deleting and modifying the information of a certain asset, and inputting the maintenance information, the allocation information and the scrapping information of the asset. The alarm management module is an abnormal displacement alarm module and is used for generating an alarm message when the assets are illegally moved and are scanned by the RFID reader, and prompting an administrator that the assets are illegally moved. The system management module comprises an organization mechanism management module, an asset type module, a personnel management module and an access control management module. The warehouse management module comprises a warehouse moving management module, a warehouse entering management module and a warehouse exiting management module, and the warehouse moving management module is used for carrying out warehouse moving operation on the equipment; the warehousing management module is used for performing warehousing operation on the equipment; the ex-warehouse management module is used for carrying out ex-warehouse operation on the equipment.

Meanwhile, the invention also discloses an asset equipment positioning management method based on the RFID by adopting the management system, which specifically comprises the following steps: placing the RFID tags in each asset device, and simultaneously writing asset information into the corresponding RFID tags; placing an RFID device at a designated location; reading information of the RFID tag by using an RFID reader, and confirming the placement of RFID equipment in place and the reading distance and angle of the equipment through a platform; when the assets pass through the range scanned by the RFID equipment, the RFID equipment reads the RFID tags and stores the scanned data to a data center; the application center updates the asset positioning according to the current data and combined with historical data; the asset statistics query module receives a certain asset positioning query request, the positioning comparison module queries historical data of a data center, judges the most possible storage position of the asset equipment, selects a plurality of possible positioning positions and marks the positions; the positioning management system sends a signal to the antenna of the possible positioning position to search the asset of the asset positioning query request, and the maximum possibility of the position of the positioning management system is calculated by adopting a method of measuring and calculating the link signal strength between nodes and utilizing a wireless signal space transmission attenuation model to estimate the distance transmitted between the nodes; and according to the maximum possibility of the position, combining a video monitoring function, realizing video linkage and determining the exact position of the asset.

The invention has the following beneficial effects:

the specific position of the asset can be quickly, efficiently and accurately positioned by establishing the positioning comparison module, so that a user can quickly find the required asset. Through the machine learning module and the user parameter module, a user can set the priority of the system for searching fixed assets according to own experience and historical parameter data of the system, and the user can be ensured to find the specific position of the searched assets in the shortest time.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.

Fig. 1 is a topological diagram of an asset device location management system of an intelligent hospital in an embodiment of the present invention.

Fig. 2 is an overall topology of an asset location management platform of an intelligent hospital in an embodiment of the present invention.

Fig. 3 is a block diagram of an RFID-based asset device location management system of an intelligent hospital in an embodiment of the present invention.

FIG. 4 is a flow chart of a method for RFID-based asset device location management for an intelligent hospital in an embodiment of the present invention.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the invention serve to explain the principles of the invention.

The following embodiments describe specific asset device positioning management systems and management methods by taking an application of the asset device positioning management system and management method in one of internet of things, an intelligent internet of things hospital as an example. The applicant needs to show that the application of the intelligent internet of things hospital does not have any limiting effect on the invention, because the method is applicable to any application scope of the internet of things, and the intelligent internet of things hospital only plays a role of an explanation case.

In a specific embodiment of the present invention, in an intelligent hospital of the internet of things, as shown in fig. 1, an asset region location management is performed by using an RFID technology, and in each monitored region, such as each room, installation and location are performed, in the whole location system, a location base station is a minimum base point, which is a closest base point of a location point, and when an asset enters a device reading range, an internet of things device automatically receives appointed identification information in an electronic tag or writes specific information in the electronic tag in a wireless manner, thereby implementing a function of automatically identifying an article or automatically collecting identification information of the article.

At the heart of the system is the asset tag, which is a small radio frequency emitting RFID. The asset tag has reliable anti-damage characteristics, and the asset automatically continuously transmits a signal from the moment the tag is worn so that the system can monitor at any time. An alarm may be triggered by an act of not leaving the corresponding ward within the authorized range. The RFID Reader (Reader Unit) is a receiving device of an asset positioning management platform, can receive signals sent by asset tags within a certain range, and can realize real-time monitoring on the position of each asset and the signal matching condition. The system constantly monitors the working condition of the card reader to ensure the highest system safety, and the system can give an alarm no matter what reason the card reader cannot work normally. An Exit Monitor (Exit Monitor) is a device dedicated to monitoring and controlling an Exit area in an asset location management platform, and is usually installed near each Exit of a controlled area (e.g., a gynecological area). Once a patient or doctor carrying an asset tag enters the control area of an exit monitor, the system immediately alerts. The exit monitor can also be externally connected with an exit alarm to realize exit alarm in a sound and light mode. A Sound and light alarm (Sound and light alarm device) is powered by using the outlet monitor terminal interface, and can provide Sound and light alarm when alarm occurs. The Communication Gateway (Communication Gateway) is installed in the weak electricity room of the ward floor, is used for collecting and processing the data of each reader and the exit monitor of the floor, manages the work of each reader and the exit monitor of the floor, is connected with a management server (software) and the LAN of the hospital by TCP/IP, and comprises linkage with monitoring alarm devices such as a security room and a computer center. Management server (software) the management server, which includes system control software and associated hardware, monitors and manages the operation of the overall system, typically installed at a nurse station. The hospital floor plan and related data, including the operating conditions of each asset tag, are displayed by the client software.

And (3) carrying out asset region positioning in some key regions, realizing region positioning and alarm prompting once the assets enter the regions, and simultaneously realizing video linkage by combining a video monitoring function. The low-frequency activator rod-shaped antenna is adopted, the distance between the activation area of each antenna is 1m to 5m, when assets enter the antenna awakening area, the label sends out the label identity ID and the activation antenna address code ID in real time, a 2.4G long-distance reader-writer directly serves as the data basis for asset area positioning after receiving the label identity ID and the activation antenna address code ID, and alarm prompt and video linkage analysis can be simultaneously carried out.

The system can also carry out regional fuzzy positioning by adopting the measurement principle of a signal transmission attenuation model. The method for measuring and calculating the link signal quality (RSSI) between nodes (a reader-writer and an electronic tag) is adopted for the area fuzzy positioning, and the transmission distance between the nodes is estimated by utilizing a wireless signal space transmission attenuation model; according to the scheme, the influence of a complex environment on RFID signal transmission can be avoided to a certain extent, and the area positioning is judged and realized by the identification times of a plurality of readers and the gain of the readers during receiving. The technology can meet the requirements of area positioning partially needed, such as: monitoring the position of special instruments in the hospital, confidential assets and the like.

As shown in fig. 2, the asset tag attached to the asset transmits a radio signal at a certain time, and is received by the reader on the floor (normal condition) or the exit monitor (stolen condition). Each reader and exit monitor is converged by a CCL (communication control line) to a communication gateway placed between weak electricity. The communication gateway centrally provides the power supply for the reader and the exit monitor, and transmits the information to other related devices or systems (including a nurse station management server, a system center management unit and a security alarm) connected to the hospital LAN through decoding and TCP, and meanwhile, the system also opens a standard interface and provides a security center image triggering function. If the system does not receive the signal, the middleware does not start monitoring, or the middleware does not issue data to the address of the system.

In order to improve the positioning efficiency and accuracy of the system, as shown in fig. 3, the system further comprises a positioning comparison module. The RFID electronic tag on the asset equipment stores corresponding information of an article and sends the information of the article to the RFID reader when the RFID electronic tag is activated; the RFID antennas are used for transmitting radio frequency signals and receiving data sent by the RFID tags; the data center is used for storing historical data and latest acquired data of each asset device; the system comprises an application center, a database management module, a system management module, an alarm management module and an asset statistical query module, wherein the application center comprises an asset management module, a warehouse management module, a system management module, an alarm management module and an asset statistical query module; the system management module comprises an organization management module, an asset type module, a personnel management module and an access control management module, wherein the organization management module is used for completing the management function of the organization of an enterprise, and can add, delete and modify the information of the organization, and the organization is the information of the department of the enterprise; the asset type management module is used for completing the functions of adding, deleting and modifying the type information of the assets, and the type of the assets is required to be selected when the assets are newly added; the asset type module is used for managing asset types, finishing the management and maintenance functions of asset type information and adding, deleting and modifying the information of asset types; the personnel management module is used for completing management operation of enterprise personnel, adding, deleting and modifying personnel information of an enterprise, distributing different authorities to the enterprise personnel and realizing management of the authority of the personnel; the entrance guard management module is used for binding the warehouse door with the RFID reader and maintaining the area information corresponding to the warehouse door. The alarm management module is an abnormal displacement alarm module and is used for generating an alarm message when the assets are illegally moved and are scanned by the RFID reader, and prompting an administrator that the assets are illegally moved. The warehouse management module comprises a warehouse moving management module, a warehouse entering management module and a warehouse exiting management module, and the warehouse moving management module is used for carrying out warehouse moving operation on equipment; the warehousing management module is used for warehousing the equipment; the ex-warehouse management module is used for carrying out ex-warehouse operation on the equipment. Of course, some modules may not be used in an intelligent hospital, but may be used in most internet of things systems.

The positioning management system also comprises a positioning comparison module, and after the asset statistics query module receives a certain asset positioning query request, the positioning comparison module queries historical data of a data center, judges the most possible storage position of the asset equipment, selects a plurality of possible positioning positions and marks the positions. In an intelligent hospital, asset equipment is generally used in several fixed places alternately, and the positioning comparison module can find the most possible positions according to historical data to send commands to the RFID detection system to find the fixed assets. The plurality of possible positioning locations is typically no more than 5 possible positioning locations. There may be 3 possible positioning locations.

The positioning management system sends a signal to the antenna of the possible positioning position to search the asset of the asset positioning query request, and the maximum possibility of the position of the positioning management system is calculated by adopting a method of measuring and calculating the link signal strength between nodes and utilizing a wireless signal space transmission attenuation model to estimate the distance transmitted between the nodes; typically, the room in which the fixed asset is located, coordinate values and angle values may be calculated.

And according to the maximum possibility of the position, combining a video monitoring function, realizing video linkage and determining the exact position of the asset.

The positioning management system also comprises a machine learning module, the positioning comparison module records the specific positioning of the assets and sends the specific positioning to the machine learning module, and the machine learning module updates the positioning data of the asset equipment, analyzes and counts the specific positions stored in the asset equipment and prepares for next asset searching.

Furthermore, the asset management module comprises an asset information inputting module and an asset information maintaining module, wherein the asset information inputting module is used for completing the function of adding asset information and processing the distribution condition of assets when the assets are added, and the information required when the assets are added comprises an asset use department, a user, the type and model of the assets, a manufacturer, a delivery date, purchasing time and an asset physical photo; the asset maintenance record is used for maintaining asset information, deleting and modifying the information of a certain asset, and inputting the maintenance information, the allocation information and the scrapping information of the asset.

Meanwhile, the invention also discloses an asset equipment positioning management method based on the RFID by adopting the management system, which specifically comprises the following steps: as shown in fig. 4, step S11 mounts RFID tags in the respective asset devices while writing asset information in the corresponding RFID tags.

Step S12 placing the RFID device at a designated location; the RFID device comprises a reader or a reader-writer, an antenna and application software. A plurality of antennas can be installed as required in each corner of intelligent hospital, conveniently look for asset equipment.

Step S13 is to read the information of the RFID tag by the RFID reader, and confirm the placement of the RFID device in place and the device reading distance and angle by the platform.

Step S14 the RFID device reads the RFID tag when the asset passes the range scanned by the RFID device and saves the scanned data to the data center.

Step S15 the application center updates the location of the asset based on the current data in combination with the historical data.

Step S16, the asset statistics inquiry module receives a certain asset positioning inquiry request, the positioning comparison module inquires the historical data of the data center, judges the most possible storage position of the asset equipment, selects a plurality of possible positioning positions and marks the positions.

Step S17, the positioning management system sends a signal to the antennas at the possible positioning locations to search for the assets of the asset positioning query request, and estimates the distance of transmission between the nodes by using a wireless signal space transmission attenuation model by using a method of measuring and calculating the link signal strength between the nodes, thereby calculating the maximum possibility of the location.

And step S18, according to the maximum possibility of the position, combining the video monitoring function to realize video linkage and determine the exact position of the asset.

The asset equipment positioning management method comprises the steps that a user parameter setting module is utilized, a user can set coefficients of possible positioning positions in the user parameter setting module according to experience, and a positioning comparison module preferentially searches the position with the maximum coefficient to determine whether the searched asset equipment exists. The coefficients are probability values that the user empirically reflects the location of the asset device being sought.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims

1. An RFID-based asset device location management system comprising:

a plurality of RFID readers;

the RFID electronic tag on the asset equipment stores corresponding information of the article and transmits the information RFID reader of the article when the RFID electronic tag is activated;

the RFID antennas are used for transmitting radio frequency signals and receiving data sent by the RFID electronic tags;

the data center is used for storing historical data and latest acquired data of each asset device;

the system comprises an application center, a database management module, a system management module, an alarm management module and an asset statistical query module, wherein the application center comprises an asset management module, a warehouse management module, a system management module, an alarm management module and an asset statistical query module;

the method is characterized in that:

the positioning management system also comprises a positioning comparison module, and after the asset statistics query module receives a certain asset positioning query request, the positioning comparison module queries historical data of a data center, judges the most possible storage position of the asset equipment, selects a plurality of possible positioning positions and marks the positions;

the positioning management system sends a signal to the antenna of the possible positioning position to search the asset of the asset positioning query request, and the maximum possibility of the position of the positioning management system is calculated by adopting a method of measuring and calculating the link signal strength between nodes and utilizing a wireless signal space transmission attenuation model to estimate the distance transmitted between the nodes;

according to the maximum possibility of the position, video linkage is realized by combining a video monitoring function, and the exact position of the asset is determined;

the positioning management system also comprises a machine learning module, the positioning comparison module records the specific positioning of the asset and sends the specific positioning to the machine learning module, and the machine learning module updates the positioning data of the asset equipment.

2. An RFID-based asset device location management system as recited in claim 1, wherein:

the plurality of possible positioning locations is no more than 5 possible positioning locations.

3. An RFID-based asset device location management system as recited in claim 2, wherein:

the plurality of possible positioning positions is 3 possible positioning positions.

4. An RFID-based asset device location management system as recited in claim 1, wherein:

the positioning comparison module also comprises a user parameter setting module, wherein a user can set the coefficients of the possible positioning positions in the user parameter setting module according to experience, and the positioning comparison module preferentially searches the position with the maximum coefficient to determine whether the searched asset equipment exists.

5. An RFID-based asset device location management system as recited in claim 4, wherein:

the coefficients are probability values that the user empirically reflects the location of the asset device being sought.

6. An RFID-based asset device location management system as recited in claim 1, wherein:

the asset management module comprises an asset information inputting module and an asset information maintaining module, the asset information inputting module is used for completing the function of adding asset information, the distribution condition of assets is processed when assets are added, and information required when assets are added comprises an asset use department, a user, the type and model of the assets, a manufacturer, a delivery date, purchasing time and an asset physical photo; the asset maintenance record is used for maintaining asset information, deleting and modifying the information of a certain asset, and inputting the maintenance information, the allocation information and the scrapping information of the asset.

7. An RFID-based asset device location management system as recited in claim 1, wherein:

the alarm management module is an abnormal displacement alarm module and is used for generating an alarm message when the assets are illegally moved and are scanned by the RFID reader, and prompting an administrator that the assets are illegally moved.

8. An RFID-based asset device location management system as recited in claim 1, wherein:

the system management module comprises an organization mechanism management module, an asset type module, a personnel management module and an access control management module.

9. An RFID-based asset device location management system as recited in claim 1, wherein:

the warehouse management module comprises a warehouse moving management module, a warehouse entering management module and a warehouse exiting management module, and the warehouse moving management module is used for carrying out warehouse moving operation on equipment; the warehousing management module is used for performing warehousing operation on the equipment; the ex-warehouse management module is used for carrying out ex-warehouse operation on the equipment.

10. An RFID-based asset device location management method using any of the location management systems of claims 1-9, comprising the steps of:

1) placing the RFID tags in each asset device, and simultaneously writing asset information into the corresponding RFID tags;

2) placing an RFID device at a designated location;

3) reading information of the RFID tag by using an RFID reader, confirming that the RFID equipment is placed in place and reading the equipment by using the platform

Distance, angle;

4) when the assets pass through the range scanned by the RFID equipment, the RFID equipment reads the RFID tags and stores the scanned data to a data center;

5) the application center updates the asset positioning according to the current data and combined with historical data;

6) the asset statistics query module receives a certain asset positioning query request, the positioning comparison module queries historical data of a data center, judges the most possible storage position of the asset equipment, selects a plurality of possible positioning positions and marks the positions;

7) the positioning management system sends a signal to the antenna of the possible positioning position to search the asset of the asset positioning query request, and the maximum possibility of the position of the positioning management system is calculated by adopting a method of measuring and calculating the link signal strength between nodes and utilizing a wireless signal space transmission attenuation model to estimate the distance transmitted between the nodes;

8) and according to the maximum possibility of the position, combining a video monitoring function, realizing video linkage and determining the exact position of the asset.

11. The RFID-based asset device location management method of claim 10, wherein:

by using the user parameter setting module, the user can set the coefficients of the possible positioning positions in the user parameter setting module according to experience, and the positioning comparison module preferentially searches the position with the maximum coefficient to determine whether the asset equipment to be searched exists.