Equipment maintenance management system based on RFID

Abstract

The invention discloses an equipment maintenance management system based on RFID. The system comprises an RFID tag, an RFID reader-writer, a tool management terminal, a maintenance personnel management terminal, an equipment management terminal and a central database. According to the system, identification and tracking of equipment, tools and maintenance personnel are achieved through the RFID technology, management and control of the equipment maintenance process are achieved through the tool management terminal, the maintenance personnel management terminal and the equipment management terminal, and storage and analysis of equipment maintenance data are achieved through the central database. The system can improve the efficiency and quality of equipment maintenance, reduce the cost and risk of equipment maintenance, and guarantee the safety and reliability of equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment maintenance management, and relates to an RFID signal processing device, in particular to an equipment maintenance management system based on RFID. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] RFID (Radio Frequency Identification) is a wireless communication technology that can identify target objects and exchange data through radio signals. RFID technology has the advantages of long identification distance, fast speed, strong anti-interference ability, and the ability to identify multiple targets at the same time. It is widely used in logistics, warehousing, manufacturing, medical care, military and other fields.

[0004] Equipment maintenance management refers to the regular or irregular inspection, maintenance, repair or replacement of equipment to ensure the normal operation and service life of the equipment. Equipment maintenance management involves data on equipment information, status, location, history, work orders, resources, personnel, etc., which requires an effective system to manage and coordinate.

[0005] At present, the commonly used equipment maintenance management system is a computer-based software system that can store, query, analyze and process equipment information, status, work orders, resources, personnel and other data. However, these systems rely on manual input, scanning or barcodes to identify equipment, and have disadvantages such as low recognition efficiency, large errors, susceptibility to environmental influences, and inability to update in real time, which limits the effectiveness and level of equipment maintenance management.

[0006] Equipment maintenance is an important task that involves the performance, lifespan, and safety of equipment. Traditional equipment maintenance management methods mainly rely on manual records and management, which have the following problems: (1) The identification and tracking of equipment, tools, and maintenance personnel are inaccurate, which is prone to omissions, confusion, and misoperation; (2) The management and control of the equipment maintenance process are not standardized, and there is a lack of effective supervision and evaluation mechanisms; (3) The storage and analysis of equipment maintenance data are imperfect, making it difficult to optimize and improve equipment maintenance. These problems lead to low efficiency and quality of equipment maintenance, increase the cost and risk of equipment maintenance, and affect the safety and reliability of equipment. Summary of the invention

[0007] In view of the above technical problems, the present invention provides an equipment maintenance management system based on RFID. The system includes:

[0008] RFID tags are attached to equipment, tools and maintenance personnel respectively, and are used to store and transmit relevant information of equipment, tools and maintenance personnel; RFID readers and writers are installed at the entrances and exits of the tool area, maintenance area and equipment area respectively, and are used to read and write information of RFID tags; the tool management terminal is set in the tool area and exchanges data with the central database; the maintenance personnel management terminal is set in the maintenance area and exchanges data with the central database; the equipment management terminal is set in the equipment area and exchanges data with the central database; the central database is set on the system server.

[0009] RFID systems often collect a large amount of duplicate or irrelevant data. Data filtering and compression algorithms can effectively identify and filter out this data, retaining only useful information. This not only increases the speed of data processing, but also reduces the resources required to store and transmit data. For this purpose, a data filtering and compression algorithm is designed. This algorithm design consists of two main parts: data filtering and data compression. The data filtering part aims to intelligently identify and remove redundant or invalid data, while the data compression part is committed to reducing the storage volume of filtered data while ensuring fast decompression and recovery of data.

[0010] The maintenance personnel management terminal ensures the safety of maintenance personnel's work. The maintenance personnel management terminal collects the RFID tag information attached by the maintenance personnel through the RFID reader / writer, and records the maintenance personnel's work path and working hours while exchanging information in real time. The central database analyzes the data and prompts the maintenance personnel to avoid potential dangers.

[0011] The maintenance personnel management terminal intelligently trains maintenance personnel and comprehensively determines the skill level and training needs of maintenance personnel based on the operation data fed back by the RFID tags on the maintenance personnel. The central database analyzes the data and generates a training plan to feed back to the personnel management terminal.

[0012] The tool management terminal intelligently and regularly counts tools. The tool management terminal links data with a central database, checks differences between records and existing tool information, and sends an inventory report to the central database. The central database analyzes the data and traces the cause of the error in combination with past information.

[0013] The central database has data analysis and report generation functions, and regularly generates reports to feed back to each terminal, including generating tool inventory reports and tool usage reports to feed back to the tool management terminal; generating personnel attendance reports, task reports and performance reports to feed back to the maintenance personnel management terminal, so as to evaluate and improve the effectiveness and efficiency of equipment maintenance management.

[0014] The tool management terminal, maintenance personnel management terminal and equipment management terminal all have voice or display screen prompt functions, which are used to provide corresponding operation instructions and feedback information to operators.

[0015] The RFID tag, RFID reader / writer, tool management terminal, maintenance personnel management terminal, equipment management terminal and central database are in the same local area network.

[0016] The RFID tags are divided into two types: passive RFID tags and semi-active RFID tags. Passive RFID tags are attached to equipment and tools for close-range information reading, and semi-active RFID tags are attached to maintenance personnel for information reading within the maintenance area.

[0017] The RFID readers are divided into two types: low-frequency RFID readers and high-frequency RFID readers. The working range of multiple low-frequency RFID readers covers the maintenance area, and high-frequency RFID readers are installed at the entrances and exits of the area to read passive RFID tags and semi-active RFID tags.

[0018] The tool management terminal is used to manage the borrowing, returning, inventory, maintenance and scrapping of tools; the maintenance personnel management terminal is used to manage the attendance, tasks, performance and training of maintenance personnel; the equipment management terminal is used to manage the warehousing, outbound, transfer, maintenance and scrapping of equipment; the central database is used to store and analyze relevant data of equipment, tools and maintenance personnel, and provide data services for the tool management terminal, maintenance personnel management terminal and equipment management terminal; the RFID reader communicates with the tool management terminal, maintenance personnel management terminal and equipment management terminal in real time to exchange information.

[0019] The present invention adopts the following technical solutions:

[0020] RFID tags: This system uses RFID tags as identification and tracking tools for equipment, tools and maintenance personnel. These RFID tags are attached to equipment, tools and maintenance personnel to store and transmit relevant information. Each RFID tag has a unique identification code that can be used to distinguish different equipment, tools and maintenance personnel.

[0021] RFID reader: Multiple RFID readers are set up in the system, which are installed at the entrances and exits of the tool warehouse, maintenance area and equipment warehouse. These readers can read and write the information stored on the RFID tags and communicate with the tool management terminal, maintenance personnel management terminal and equipment management terminal. Through the RFID reader, the system can obtain the location and status information of equipment, tools and maintenance personnel in real time.

[0022] Data filtering algorithm:

[0023] Preprocessing: Collect the raw data generated by the RFID system and perform preliminary formatting, such as removing noise and correcting signal strength.

[0024] Feature extraction: Extract key features from the preprocessed data. These features may include but are not limited to tag ID, signal strength, timestamp, etc.

[0025] Duplicate data identification: Use a time window-based method to analyze continuously collected data to identify and mark data that appears repeatedly in a short period of time.

[0026] Irrelevant data filtering: Use machine learning models to identify and filter out data that is irrelevant to the current application scenario based on the characteristics of the data and the processing results of historical data.

[0027] Data compression algorithm:

[0028] Adaptive selection of compression algorithm: Dynamically select the most suitable compression algorithm, such as Huffman coding, LZ77, etc., based on the characteristics of the filtered data (such as data volume, data type, etc.).

[0029] Block compression: Divide a large amount of data into small blocks and compress each data block separately. The advantage of this is that only part of the data can be decompressed when needed, rather than the entire data, which improves data access efficiency.

[0030] Redundant data compression: For repeated data blocks, only one copy is stored and its location in the data stream is recorded to further reduce storage space.

[0031] Index and metadata management: Create an index system to record metadata such as compression information, location, and decompression method of each data block to facilitate fast access and recovery of data.

[0032] Tool management terminal: This terminal is set up in the tool library to manage the borrowing, return, inventory, maintenance and scrapping of tools. The tool management terminal can read the RFID tag information on the tool through the RFID reader to realize automatic identification and registration of the tool. At the same time, the tool management terminal exchanges data with the central database to update the tool usage and maintenance records in real time.

[0033] Maintenance personnel management terminal: This terminal is set up in the maintenance area to manage maintenance personnel's attendance, task allocation, performance evaluation and training. The maintenance personnel management terminal can read the RFID tag information on the maintenance personnel through the RFID reader and writer to record the time and date of their entry and exit from the maintenance area. At the same time, the maintenance personnel management terminal exchanges data with the central database to update the maintenance personnel's work records and skill training in real time.

[0034] Equipment management terminal: This terminal is set up in the equipment warehouse to manage the equipment's entry, exit, transfer, maintenance and scrapping. The equipment management terminal can read the RFID tag information on the equipment through the RFID reader to realize automatic identification and registration of the equipment. At the same time, the equipment management terminal exchanges data with the central database to update the equipment's location, status and maintenance history in real time.

[0035] Central database: The system is equipped with a central database for storing and analyzing data related to equipment, tools and maintenance personnel. The central database can record basic information of equipment, maintenance records, training of maintenance personnel, etc. By analyzing these data, managers can develop more scientific and effective equipment maintenance strategies and improve maintenance efficiency and quality.

[0036] RFID tags are attached to equipment, tools and maintenance personnel to store and transmit relevant information. Each RFID tag has a unique identification code to distinguish different equipment, tools and maintenance personnel.

[0037] RFID readers are installed at the entrances and exits of tool storage, maintenance area and equipment storage. These readers can read and write information stored on RFID tags and communicate with tool management terminals, maintenance personnel management terminals and equipment management terminals. Through RFID readers, the system can obtain the location and status information of equipment, tools and maintenance personnel in real time.

[0038] The tool management terminal is set up in the tool library to manage the borrowing, returning, inventory, maintenance and scrapping of tools. The tool management terminal can read the RFID tag information on the tool through the RFID reader to realize automatic identification and registration of the tool. At the same time, the tool management terminal exchanges data with the central database to update the tool usage and maintenance records in real time.

[0039] The maintenance personnel management terminal is set up in the maintenance area to manage the maintenance personnel's attendance, task allocation, performance evaluation and training. The maintenance personnel management terminal can read the RFID tag information on the maintenance personnel through the RFID reader and writer to record the time and date of their entry and exit from the maintenance area. At the same time, the maintenance personnel management terminal exchanges data with the central database to update the maintenance personnel's work records and skill training in real time.

[0040] The equipment management terminal is set up in the equipment warehouse to manage the equipment's entry, exit, transfer, maintenance and scrapping. The equipment management terminal can read the RFID tag information on the equipment through the RFID reader to realize automatic identification and registration of the equipment. At the same time, the equipment management terminal exchanges data with the central database to update the equipment's location, status and maintenance history in real time.

[0041] The central database is used to store and analyze data related to equipment, tools, and maintenance personnel. The central database can record basic information of equipment, maintenance records, and training of maintenance personnel, etc. By analyzing these data, managers can develop more scientific and effective equipment maintenance strategies and improve maintenance efficiency and quality.

[0042] When a person or equipment enters or leaves the tool library, maintenance area or equipment library, the RFID reader will read the RFID tag information on it and send it to the corresponding management terminal and central database. Managers can use the management terminal to understand the location, status and usage of the corresponding equipment, tools and maintenance personnel in real time, so as to better understand the management situation.

[0043] When a tool or equipment needs to be repaired, the maintenance personnel can obtain the task assignment through the maintenance personnel management terminal and borrow the required tools and equipment. The system will automatically record the borrowing of tools and equipment, and return them and update the maintenance records after the maintenance is completed.

[0044] Through RFID technology, accurate identification and tracking of equipment, tools and maintenance personnel can be achieved, reducing human errors and missed detections, and improving the accuracy and traceability of the maintenance process. Through the management and control of the maintenance process, it is ensured that all operations are carried out in accordance with the prescribed procedures, improving maintenance efficiency and consistency. Through the central database, equipment maintenance data can be stored and analyzed, problems and improvement measures can be discovered in a timely manner, and the quality and level of equipment maintenance can be improved.

[0045] The system uses RFID technology to realize automatic identification, positioning and status monitoring of equipment, as well as integration with computerized maintenance management systems, thereby improving the efficiency, accuracy and standardization of equipment maintenance.

[0046] Therefore, the present invention proposes an equipment maintenance management system based on RFID, which realizes comprehensive, intelligent and efficient support for equipment maintenance management by attaching RFID tags to equipment, using RFID readers and antennas to automatically identify, locate and monitor the status of equipment, and integrating with computerized maintenance management systems. The system of the present invention has the following advantages:

[0047] It can realize fast, accurate and contactless identification of equipment without human intervention, saving time and manpower and improving efficiency and accuracy.

[0048] It can realize real-time, dynamic and all-round positioning and status monitoring of equipment, timely discover and prevent equipment failures and abnormalities, and improve the reliability and safety of equipment.

[0049] It can achieve seamless integration with computerized maintenance management systems, realize automatic data collection, transmission and updating, avoid data redundancy and inconsistency, and improve data quality and availability.

[0050] It can realize intelligent management and optimization of equipment maintenance, automatically generate and schedule maintenance work orders based on equipment information, status, location and other data, reasonably allocate maintenance resources and personnel, and improve the effect and level of maintenance.

[0051] The beneficial effects of the present invention are:

[0052] Improve the accuracy and traceability of equipment maintenance: Accurately identifying and tracking equipment, tools, and maintenance personnel through RFID technology can reduce human errors and missed inspections, and improve the accuracy and traceability of the maintenance process.

[0053] Improve the standardization and efficiency of equipment maintenance: Manage and control the maintenance process through tool management terminals, maintenance personnel management terminals and equipment management terminals to ensure that all operations are carried out in accordance with the prescribed procedures, thereby improving maintenance efficiency and consistency.

[0054] Improve the quality and level of equipment maintenance: By storing and analyzing equipment maintenance data in a central database, problems and improvement measures can be discovered in a timely manner, thereby improving the quality and level of equipment maintenance.

[0055] Reduce the cost and risk of equipment maintenance: Avoid waste and loss of resources by accurately tracking the use of equipment and tools; extend the life of equipment and reduce maintenance costs and risks through timely maintenance and repair.

[0056] Ensure the safety and reliability of equipment: Ensure the safety and reliability of equipment by real-time monitoring of equipment location and status, timely detection and handling of faults.

[0057] The system can identify and track equipment, tools and maintenance personnel through RFID technology, manage and control the equipment maintenance process through tool management terminals, maintenance personnel management terminals and equipment management terminals, and store and analyze equipment maintenance data through a central database, thereby improving the efficiency and quality of equipment maintenance, reducing the cost and risk of equipment maintenance, and ensuring the safety and reliability of equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solution of the present invention, the drawings required to be used in the embodiments are briefly introduced below.

[0059] Figure 1 It is the overall structure diagram of the system of the present invention.

[0060] Figure 2 It is a tool management flow chart of the present invention.

[0061] Figure 3 It is a maintenance personnel management flow chart of the present invention.

[0062] Figure 4 It is the equipment management flow chart of the present invention. DETAILED DESCRIPTION

[0063] The embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0064] Step a1, RFID tag selection and installation: Select RFID tags suitable for equipment, tools and maintenance personnel, and ensure that they have stable performance and good read and write distance. Stick the RFID tags to the appropriate positions of equipment, tools and maintenance personnel, and ensure that the RFID tags are in close contact with the surface of the object to avoid easy falling or damage.

[0065] Step a2, installation and configuration of RFID readers: According to actual needs, install RFID readers at the entrances and exits of tool storage, maintenance area and equipment storage. According to the layout and characteristics of different areas, set the reader's reading distance, reading speed and reading mode parameters to ensure that the system can accurately read the information on the RFID tag.

[0066] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0067] Figure 1 : is the overall structure diagram of the system of the present invention. As shown in the figure, the system of the present invention includes an RFID tag, an RFID reader / writer, a tool management terminal, a maintenance personnel management terminal, an equipment management terminal and a central database.

[0068] The filtering algorithm is used for data exchange between RFID tags, RFID readers, tool management terminals, maintenance personnel management terminals, equipment management terminals and the central database. The specific implementation method of the filtering algorithm is as follows:

[0069] Preprocessing: Normalize the signal strength, set a threshold θ (e.g. θ = -80 dBm), and treat signals below this threshold as noise and filter them out.

[0070] Feature extraction: Extract key features from each valid data point, such as signal strength (-80dBm to -30dBm), timestamp (accurate to milliseconds), tag ID, etc.

[0071] Duplicate data identification: Set a time window Δt (for example, Δt=5s). The same tag ID read continuously within this time window is considered as duplicate data, and only the record of the first read is retained.

[0072] Irrelevant data filtering: After the machine learning model has achieved at least 95% accuracy through the training dataset (containing at least thousands of data points), it is used to filter data in real time.

[0073] Specific implementation method of data compression algorithm:

[0074] Adaptive compression algorithm selection: Select the compression algorithm based on the entropy calculation result of the data. For example, if the entropy value of the data is less than 0.5 (low entropy), select Huffman coding; if the entropy value is greater than 0.5 (high entropy), select LZ77 algorithm.

[0075] Block compression: Divide the data into blocks, each block is 1KB in size. Compress each block independently and record the compression ratio. The expected average compression ratio should be at least 60%.

[0076] Redundant data compression: For duplicate data blocks, a redundancy reduction rate of more than 99% is achieved, that is, almost all duplicate data blocks are stored only once.

[0077] Index and metadata management: The index system can locate a specified data block within 100ms and decompress the data block within 50ms.

[0078] To test the performance, 5GB of raw data will be generated. Through the data filtering algorithm, we expect to remove 60% of redundant and irrelevant data, leaving 2GB of valid data. Then, through the data compression algorithm, we aim to compress this 2GB of data to 800MB, achieving a compression rate of 60%. In this way, the amount of data stored per day is reduced from 5GB to 800MB, significantly reducing storage costs and increasing the speed of data processing.

[0079] There are three types of RFID tags: equipment tags, tool tags, and maintenance personnel tags. Equipment tags are attached to the surface or inside of equipment to store and transmit information such as the equipment number, name, model, specification, status, location, and history. Tool tags are attached to the surface or inside of tools to store and transmit information such as the tool number, name, model, specification, status, location, and history. Maintenance personnel tags are attached to maintenance personnel's work clothes or work badges to store and transmit maintenance personnel's number, name, position, department, skills, attendance, tasks, performance, and other information. RFID tags can use different frequencies and packaging forms. Passive RFID tags are attached to equipment and tools for close-range information reading, and semi-active RFID tags are attached to maintenance personnel for information reading within the maintenance area.

[0080] There are three types of RFID readers: tool library readers, maintenance area readers, and equipment library readers. Tool library readers are installed at the entrance and exit of the tool library to read and write information on tool tags and communicate with the tool management terminal. Maintenance area readers are installed at the entrance and exit of the maintenance area to read and write information on equipment tags and maintenance personnel tags and communicate with the maintenance personnel management terminal. Equipment library readers are installed at the entrance and exit of the equipment library to read and write information on equipment tags and maintenance personnel tags and communicate with the equipment management terminal. RFID readers can use different frequencies and communication protocols, and can be selected and configured according to different application scenarios and distance requirements.

[0081] RFID tags: Maintenance personnel carry tags that store identification information and other relevant data.

[0082] RFID reader: deployed at key locations, responsible for reading and writing tag information.

[0083] Data processing system: usually a central database that receives data from the reader and writer and performs further processing.

[0084] The reader-activated tag method uses passive tags, that is, the reader sends out a radio wave signal to activate nearby passive RFID tags. The tag uses the signal energy sent by the reader to activate the internal circuit and send back a signal.

[0085] When an RFID tag is activated, it transmits the information stored in it back to the reader via radio waves. After receiving this information, the RFID reader converts it into a digital signal. The reader sends the received digital signal (usually containing the tag's unique identification code and other relevant data) to a central database via the network. In an environment where multiple tags exist at the same time, the reader uses an anti-collision algorithm. This patent uses a dynamic frame time slot ALOHA algorithm. The dynamic frame time slot ALOHA algorithm is an algorithm used to solve signal conflict problems when multiple RFID tags communicate with the reader at the same time, so as to distinguish and read the information of each tag independently.

[0086] The dynamic frame slotted ALOHA algorithm can be explained in mathematical language as follows: Initialization: Set a frame length F, which represents the number of time slots that can be used to try to send a message in a time period. At the same time, set the successful transmission count S and the collision count C to 0, and the time slot count T to 0.

[0087] Cyclic detection: As long as there is a maintenance task (i.e. maintenance personnel need to enter the hazardous area), the following steps are performed:

[0088] a. If the slot count T reaches the frame length F (meaning the end of a frame period), the frame length is adjusted according to the conflict and success conditions:

[0089] If a conflict occurs (C>0), the frame length F is multiplied by a conflict factor to increase the number of time slots in the next cycle and reduce the possibility of conflict.

[0090] If there is a successful transmission (S>0), the frame length F is divided by a success factor to reduce unnecessary waiting time.

[0091] Reset counters S, C and T to 0 and start a new frame period.

[0092] b. The maintenance personnel selects a random time slot within the current frame length F to make an entry attempt and increases the time slot count T by 1.

[0093] c. Update the counter based on the result of the entry attempt:

[0094] If the entry attempt is successful, the success count S is incremented by 1.

[0095] If a conflict occurs (for example, multiple maintenance personnel select the same time slot), the conflict count C is increased by 1.

[0096] Repeat: Repeat the above process until all maintenance tasks are completed.

[0097] The purpose of this algorithm is to dynamically adjust the number of time slots to balance the waiting time and the probability of conflict. In the scenario where maintenance personnel enter the dangerous area, it can detect and remind them in time.

[0098] Step a3, development and configuration of system software: develop corresponding management software according to the needs of equipment maintenance management. The software should include modules such as tool management, maintenance personnel attendance and equipment management. Through software configuration and settings, information management, business process control and data exchange functions of tools, maintenance personnel and equipment can be realized.

[0099] Step a4, database establishment and management: Establish a central database to store and manage relevant data of equipment, tools and maintenance personnel. Design the database table structure according to system requirements and establish corresponding data tables and fields. At the same time, configure the database permissions and access methods to ensure data security and reliability.

[0100] The following are Figure 2 Annotation of the tool management flowchart and detailed explanation of the implementation process:

[0101] The tool management terminal is set up in the tool library to manage the borrowing, returning, inventory, maintenance and scrapping of tools, and exchange data with the central database. At the scheduled inventory time, the tool management terminal automatically activates the RFID reader to scan the RFID tags of all tools and collect real-time data of the current tools. The tool management terminal compares the scanned data with the registration records stored in the central database to identify any missing or unregistered tools. A detailed inventory report is generated, including the current status of all tools, a list of missing tools, a list of unregistered tools, etc. The inventory report is automatically sent to the central database.

[0102] The central database analyzes possible causes of errors, such as lost tools, untimely returns, damaged labels, etc. Use historical data to analyze trends and patterns of lost or damaged tools. Combine tool usage records, maintenance records, and inventory history to trace the causes of errors. Identify specific tools or tool groups that frequently cause problems, as well as possible responsible persons. Automatically generate comprehensive reports containing error analysis and traceability results. Provide intuitive charts and statistics to help managers quickly understand the problem.

[0103] An example of a tool management terminal inventory report is shown in Table 1:

[0104] Table 1 Inventory report of tool management terminal

[0105]

[0106]

[0107] The tool management terminal has the following functions:

[0108] Tool borrowing: When maintenance personnel need to borrow tools, they need to place their maintenance personnel tags and the required tool tags in the identification area of ​​the tool library reader / writer. The tool library reader / writer reads the information of both and sends it to the tool management terminal. The tool management terminal makes a judgment based on the status of the tool and the maintenance personnel's authority. If the tool can be borrowed and the maintenance personnel has the borrowing authority, the tool management terminal will update the status of the tool to "borrowed", and record the borrower, borrowing time, borrowing reason and other information of the tool, and send this information to the central database. The central database retrieves the target tool information, matches the maintenance personnel's use authority, determines whether the request is successful, and feeds back the result to the tool management terminal. At the same time, the tool management terminal prompts the maintenance personnel through voice or display screen that the borrowing is successful, and reminds the maintenance personnel to pay attention to the use and storage of the tool. If the tool cannot be borrowed, or the maintenance personnel does not have the borrowing authority, the tool management terminal will reject the borrowing request, and prompt the maintenance personnel through voice or display screen that the borrowing fails, and give the corresponding reason.

[0109] Tool return: When the maintenance personnel finish using the tool, they need to place their maintenance personnel tag and the tool tag they use in the identification area of ​​the tool library reader / writer. The tool library reader / writer reads the information of both and sends it to the tool management terminal. The tool management terminal makes a judgment based on the status of the tool and the identity of the maintenance personnel. If the tool is borrowed by the maintenance personnel, the tool management terminal will update the status of the tool to "in stock" and record the returner, return time, return reason and other information of the tool, and send this information to the central database. The central database retrieves the target tool information, matches the maintenance personnel's return authority, determines whether the request is successful, and feeds back the result to the tool management terminal. At the same time, the tool management terminal prompts the maintenance personnel through voice or display screen that the return is successful, and reminds the maintenance personnel to pay attention to the cleanliness and integrity of the tool. If the tool is not borrowed by the maintenance personnel, or the tool has been returned, the tool management terminal will reject the return request, and prompt the maintenance personnel through voice or display screen that the return failed, and give the corresponding reason.

[0110] Tool inventory: The tool management terminal can take inventory of the tools in the tool library regularly or as needed to check whether the quantity, status and location of the tools are consistent with the records in the central database. The tool management terminal scans all tool tags in the tool library through the tool library reader, obtains the tool information, and compares it with the information in the central database. If it is found that the quantity, status or location of the tools are inconsistent with the records in the central database, the tool management terminal will record these differences and prompt the tool library administrator to check and handle them through voice or display. The tool management terminal can also generate an inventory report for the tool library based on the inventory results and send it to the central database. The central database comprehensively judges the reasons for errors in the inventory process based on past information, including the application content of the maintenance personnel and the last use records of each maintenance tool, and sends the report to the tool management terminal to help correct errors in the inventory work.

[0111] Tool maintenance: The tool management terminal can perform regular or required maintenance on the tool according to the tool usage and maintenance rules to ensure the performance and life of the tool. The tool management terminal reads the tool information through the tool library reader and combines it with the tool usage record in the central database to determine whether the tool needs maintenance. If maintenance is required, the tool management terminal will update the tool status to "under maintenance" and prompt the tool library administrator to perform maintenance operations through voice or display. If the user of the maintenance tool determines that the tool needs maintenance after use, he can also report the maintenance demand to the tool management terminal. The tool management terminal transmits the information to the central database. The central database calculates and simulates the tool status and feeds back the maintenance request results to the tool management terminal, quickly entering the maintenance process, thereby shortening the maintenance time and speeding up the reuse of the tool. The tool management terminal can also generate a maintenance record of the tool according to the maintenance status of the tool and send it to the central database.

[0112] Tool scrapping: When a tool can no longer be used due to damage or expiration, the tool management terminal can scrap the tool to avoid waste and harm of the tool. The tool management terminal reads the tool information through the tool library reader and writer to determine whether the tool needs to be scrapped. If it needs to be scrapped, the tool management terminal will update the tool status to "scrapped" and prompt the tool library administrator to scrap it through voice or display. If the tool user determines that the tool needs maintenance during or after use, he can also report the scrapping demand to the tool management terminal. The tool management terminal transmits the information to the central database. The central database calculates and simulates and feeds back the scrapping request results to the tool management terminal, quickly enters the scrapping process, and avoids the redundancy of the scrapping process. The tool management terminal can also generate a scrapping record of the tool according to the scrapping situation of the tool and send it to the central database.

[0113] The tool management process includes tool borrowing, returning, inventorying, maintenance and scrapping. In this process, the tool management terminal is set up in the tool library to manage the borrowing, returning, inventorying, maintenance and scrapping of tools, and to exchange data with the central database, and regularly upload tool management logs and tool usage reports to the central database.

[0114] The main responsibility of the administrator is to maintain the central database, ensure smooth information exchange between the tool management terminal and the central database, and intervene and maintain when obstacles arise in the information exchange between the two parties; the administrator's work content also includes managing tool maintenance rules, managing tool borrowing permissions, etc.

[0115] The above is the logical description of the tool management process. Through the cooperation of the tool library reader and the tool management terminal, the automatic management and data exchange of tool borrowing, returning, inventory, maintenance and scrapping are realized, which improves the efficiency and accuracy of tool management and reduces human misoperation and data errors.

[0116] The following are Figure 3 Annotation of the maintenance personnel management flowchart and detailed explanation of the implementation process:

[0117] The maintenance personnel management terminal is set up in the maintenance area to manage the maintenance personnel's attendance, tasks, performance and training, and to exchange data with the central database. Maintenance personnel add their own maintenance personnel tags and work with the maintenance personnel management terminal. The maintenance personnel management terminal has the following functions:

[0118] Maintenance personnel attendance: When maintenance personnel enter or leave the maintenance area, they need to place their maintenance personnel tags in the identification area of ​​the maintenance area reader / writer. The maintenance area reader / writer reads the maintenance personnel's information and sends it to the maintenance personnel management terminal. The maintenance personnel management terminal makes a judgment based on the maintenance personnel's information and time. If it is the first time for the maintenance personnel to enter the maintenance area, the maintenance personnel management terminal will record the maintenance personnel's working time, and prompt the maintenance personnel to successfully go to work through voice or display screen, and remind the maintenance personnel to pay attention to safety and quality. If it is the last time for the maintenance personnel to leave the maintenance area, the maintenance personnel management terminal will record the maintenance personnel's off-duty time, and prompt the maintenance personnel to successfully leave work through voice or display screen, and remind the maintenance personnel to pay attention to rest and health. The maintenance personnel management terminal can also generate maintenance personnel's attendance report based on the maintenance personnel's attendance and send it to the central database.

[0119] Maintenance personnel tasks: The maintenance personnel management terminal can assign appropriate maintenance tasks to maintenance personnel based on the maintenance requirements of the equipment and the skills and load of the maintenance personnel, and prompt the maintenance personnel to accept the tasks through voice or display. The maintenance personnel management terminal can also monitor the maintenance personnel's task progress and status through the information data fed back by the maintenance personnel's tags, and prompt the maintenance personnel to complete the task or handle the abnormality through voice or display. The maintenance personnel management terminal can also generate maintenance personnel's task reports based on the maintenance personnel's task status and send them to the central database for recording.

[0120] Skill level algorithm:

[0121] Set evaluation indicators, such as task time (T), success rate (S), rework rate (R), operation frequency (F), and skill diversity (D).

[0122] Calculate the comprehensive skill index (Skill Index, SI): SI = w1*(Tavg / T)+w2*S-w3*R+w4*F+w5*D

[0123] Among them, w1 to w5 are the weight coefficients of each indicator, and Tavg is the average time consumption.

[0124] Maintenance personnel performance: The maintenance personnel management terminal can evaluate the maintenance personnel's performance based on their task completion and tool usage, and prompt the maintenance personnel's performance results through voice or display. The maintenance personnel management terminal can also generate a performance report for the maintenance personnel based on their performance and send it to the central database. At the same time, the central database can also adjust the strategy for dispatching maintenance tasks based on the performance report, making the management system more user-friendly and improving the work efficiency of maintenance personnel in subsequent operations.

[0125] Maintenance personnel training: The maintenance personnel management terminal can provide maintenance personnel with corresponding training content and methods according to their skill level and training needs, and prompt the maintenance personnel with the current training progress and effect through voice or display. The maintenance personnel management terminal can also generate maintenance personnel training records based on the maintenance personnel's training status. The training records include information such as training projects, training duration and assessment results, and the maintenance personnel management terminal sends them to the central database for archiving.

[0126] Training Needs Algorithm:

[0127] Based on the skill index (SI), determine the threshold for each skill. If the SI is lower than the Threshold, it is marked as requiring training. Calculate the training priority (TP): TP = Threshold - SI

[0128] Training program modules:

[0129] Assign training resources to each skill marked as requiring training. Determine the order of training based on TP sorting. Generate a training plan, including course name, recommended time, and required resources.

[0130] Training effectiveness evaluation:

[0131] Compare the SI changes before and after the training through subsequent operation data. If the SI improves significantly, the training is considered effective. If the improvement is not obvious, analyze the cause and adjust the training plan.

[0132] The maintenance personnel management process involves maintenance personnel attendance, task allocation, performance evaluation and training. The maintenance personnel management terminal is located in the maintenance area and is used to manage the maintenance personnel's work and exchange data with the central database. Through the functions of the maintenance personnel management terminal, the maintenance personnel attendance, task allocation, performance evaluation and training services are automated and exchanged, which improves the efficiency and accuracy of maintenance personnel management and makes management work more scientific and standardized.

[0133] A specific example of an employee training plan report is shown in Table 2:

[0134] Table 2 Staff Training Program Report

[0135]

[0136]

[0137] The following are Figure 4 Annotation of the equipment management flow chart and detailed explanation of the implementation process:

[0138] The equipment management terminal is set up in the equipment warehouse to manage the equipment entry, exit, transfer, maintenance and scrapping, and exchange data with the central database. The equipment management terminal has the following functions:

[0139] Equipment storage: When newly purchased or repaired equipment needs to be stored, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database. The central database makes a judgment based on the equipment information and inventory status. If the equipment can be stored, the central database will update the equipment status to "in storage", assign the storage location of the equipment, and send this information to the equipment management terminal. At the same time, the equipment management terminal prompts the equipment warehouse administrator to place the equipment in the designated location and complete the storage operation through voice or display. If the equipment cannot be stored, or the equipment information is incorrect, the central database will reject the storage request, and prompt the equipment warehouse administrator through voice or display that the storage failed, and give the corresponding reason.

[0140] Equipment out of the warehouse: When equipment that needs to be used or repaired needs to be out of the warehouse, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database. The central database makes a judgment based on the equipment information and inventory status. If the equipment can be out of the warehouse, the central database will update the equipment status to "out of the warehouse" and record the equipment out of the warehouse, out of the warehouse time, out of the warehouse reason and other information, and send this information to the equipment management terminal. At the same time, the equipment management terminal prompts the equipment warehouse administrator to take out the equipment and complete the out of the warehouse operation through voice or display. If the equipment cannot be out of the warehouse, or the equipment information is incorrect, the central database will reject the out of the warehouse request, and prompt the equipment warehouse administrator through voice or display that the out of the warehouse failed, and give the corresponding reason.

[0141] Equipment transfer: When equipment needs to be transferred from one warehouse to another, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database. The central database makes a judgment based on the equipment information and inventory status. If the equipment can be transferred, the central database will update the equipment status to "in transfer" and record the equipment transferor, transfer time, transfer reason, transfer destination and other information, and send this information to the equipment management terminal. At the same time, the equipment management terminal prompts the equipment warehouse administrator to pack the equipment and complete the transfer operation through voice or display. If the equipment cannot be transferred or the equipment information is incorrect, the central database will reject the transfer request and prompt the equipment warehouse administrator through voice or display that the transfer failed and give the corresponding reason.

[0142] Equipment maintenance: When equipment fails or is damaged and needs maintenance, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database. The central database makes a judgment based on the equipment information and maintenance status. If the equipment needs maintenance, the central database will update the equipment status to "under maintenance" and record the equipment's maintenance person, maintenance time, maintenance reason, maintenance plan and other information, and send this information to the equipment management terminal. At the same time, the equipment management terminal prompts the equipment warehouse administrator through voice or display to send the equipment to the designated maintenance location and complete the maintenance operation. If the equipment does not need maintenance or the equipment information is incorrect, the central database will reject the maintenance request and prompt the equipment warehouse administrator through voice or display that the maintenance has failed and give the corresponding reason.

[0143] Equipment scrapping: When the equipment cannot be repaired due to expiration or damage, the equipment management terminal reads the equipment information through the equipment library reader and sends it to the central database. The central database makes a judgment based on the equipment information and scrapping status. If the equipment needs to be scrapped, the central database will update the equipment status to "scrapped" and record the scrapper, scrapping time, scrapping reason, scrapping treatment and other information of the equipment, and send this information to the equipment management terminal. At the same time, the equipment management terminal prompts the equipment library administrator to scrap the equipment through voice or display screen and complete the scrapping operation. If the equipment does not need to be scrapped, or the equipment information is incorrect, the central database will reject the scrapping request, and prompt the equipment library administrator through voice or display screen that the scrapping failed and give the corresponding reason.

[0144] Step a5, system testing and debugging: Perform system testing and debugging in the actual environment to verify the system's functions and performance. The test includes aspects such as the reading and writing capabilities of RFID tags, the stability of the reader and writer, and the functional integrity of the software. Optimize and adjust according to the test results to ensure the normal operation and stability of the system.

[0145] Step a6, training and promotion: Train management and maintenance personnel to familiarize them with the system usage and operation procedures. At the same time, publicize and promote the advantages and effects of the equipment maintenance management system to increase its application rate in enterprises and institutions.

[0146] It is worth noting that during the implementation process, customized development and configuration are required according to specific scenarios and needs to ensure that the system is compatible with the existing equipment maintenance process and management model. In addition, attention should be paid to the security and privacy protection of the system to avoid information leakage and illegal operations.

[0147] The embodiments of the present invention are only for illustrating the technical solution of the present invention and do not limit the protection scope of the present invention. Under the guidance of the technical idea of ​​the present invention, any modification or replacement of the technical solution of the present invention shall be included in the protection scope of the present invention. The protection scope of the present invention shall be based on the content defined in the claims.

[0148] The present invention provides a concept and method of an equipment maintenance management system based on RFID. There are many methods and ways to implement the technical solution. The above is only a preferred implementation of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented using existing technologies.

Claims

1. An equipment maintenance management system based on RFID, characterized in that: The system includes: RFID tags are attached to equipment, tools and maintenance personnel to store and transmit relevant information of equipment, tools and maintenance personnel; RFID readers and writers are installed at the entrances and exits of the tool area, maintenance area, and equipment area to read and write information from RFID tags; Tool management terminal, which is set up in the tool area and exchanges data with the central database; Maintenance personnel management terminal, which is set up in the maintenance area and exchanges data with the central database; Equipment management terminal, which is set up in the equipment area and exchanges data with the central database; Central database, set up on the system server.

2. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The functions of the maintenance personnel management terminal include maintenance personnel attendance, maintenance personnel tasks, maintenance personnel performance, maintenance personnel training and ensuring maintenance personnel work safety: The maintenance personnel attendance includes the steps of identifying the maintenance personnel tag when the maintenance personnel enters or leaves the maintenance area, the maintenance area sends the tag information to the maintenance personnel management terminal, the maintenance personnel management terminal judges the maintenance personnel's on-duty and off-duty actions according to the maintenance personnel's information and time, records the on-duty and off-duty time, and the maintenance personnel management terminal generates a maintenance personnel attendance report according to the maintenance personnel's attendance status and sends it to the central database; The maintenance personnel task step includes the maintenance personnel management terminal allocating maintenance tasks to maintenance personnel according to the maintenance requirements of the equipment, the maintenance personnel's skills and the maintenance personnel's load, the maintenance personnel management terminal monitoring the maintenance personnel's task progress and status through the information fed back by the maintenance personnel's tags, and the maintenance personnel management terminal generating a maintenance personnel task report according to the maintenance personnel's task status and sending it to the central database; The maintenance personnel performance step includes the maintenance personnel management terminal evaluating the maintenance personnel's performance according to the maintenance personnel's task completion and tool usage, the maintenance personnel management terminal generating a maintenance personnel performance report according to the maintenance personnel's performance, and sending the report to the central database, and the central database adjusting the strategy for dispatching maintenance tasks according to the performance report; The maintenance personnel training steps include the maintenance personnel management terminal providing training content and methods to the maintenance personnel according to the maintenance personnel's skill level and training needs, the maintenance personnel management terminal generating a maintenance personnel training record according to the maintenance personnel's training situation, the training record including training items, training duration and assessment results, and the maintenance personnel management terminal sending it to the central database for archiving. To ensure the safety of maintenance personnel's work, the maintenance personnel management terminal collects the RFID tag information attached by the maintenance personnel through the RFID reader / writer, and records the maintenance personnel's work path and working time while exchanging information in real time. The central database analyzes the data and prompts the maintenance personnel to avoid potential dangers according to the analysis results through the dynamic frame time slot ALOHA algorithm.

3. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The tool management terminal functions include tool borrowing, tool return, tool inventory, tool maintenance and tool scrapping. The tool borrowing step includes the following steps: the tool management terminal receives the RFID information sent by the tool library, determines whether the tool is borrowed according to the status of the tool and the authority of the maintenance personnel, and if the borrowing conditions are met, the tool is borrowed and relevant information is recorded, including the borrower of the tool, the borrowing time and the borrowing reason, and the information is sent to the central database. The central database retrieves the target tool information and matches the maintenance personnel's use authority. If the verification is qualified, the tool management terminal is fed back to the tool management terminal, and the tool management terminal prompts the maintenance personnel to pay attention to the use of the tool; if the borrowing conditions are not met, the tool management terminal prompts the maintenance personnel the reason for the failure; The tool return step includes the following steps: the tool management terminal receives the RFID information sent by the tool library, determines whether the tool can be returned according to the status of the tool and the identity of the maintenance personnel, returns the tool if the return conditions are met, and records the relevant information, including the returner, return time and return reason of the tool, and sends the information to the central database, which retrieves the target tool information and matches the maintenance personnel's use authority, and feeds back the information to the tool management terminal after verification, and the tool management terminal prompts the maintenance personnel to pay attention to the tool return; if the return conditions are not met, the tool management terminal prompts the maintenance personnel the reason for the failure; The tool inventory step includes exchanging data between the tool management terminal and the central database, checking the differences between the tool registration records and the existing tool information and sending the inventory report to the central database, and the central database analyzes the data and traces the cause of the error in combination with the past information; The tool maintenance step includes the tool management terminal determining whether the tool needs maintenance based on the tool RFID information and the use record of the central database, the tool management terminal updating the status of the tool and providing the tool library administrator with maintenance; Maintenance personnel can proactively report maintenance requirements to the tool management system, which transmits information to the central database, which determines whether the maintenance request is accepted through calculation and simulation; The tool management terminal generates tool maintenance records based on tool maintenance conditions and sends them to the central database; The tool scrapping step includes the following steps: the tool management terminal receives the RFID information sent by the tool library, determines whether the tool needs to be scrapped, and if it needs to be scrapped, the tool management terminal updates the status of the tool to "scrapped" and prompts the tool library administrator to perform the scrapping operation; if the tool user determines that the tool needs to be maintained during or after use, the scrapping demand is reported to the tool management terminal, and the tool management terminal transmits the information to the central database, which calculates and simulates the tool status and feeds back the scrapping request result to the tool management terminal; The tool management terminal generates a scrap record of the tool according to the scrap condition of the tool and sends it to the central database.

4. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The equipment management terminal functions include equipment storage, equipment out of storage, equipment transfer, equipment maintenance and equipment scrapping: The equipment storage step includes: when the equipment is stored, the equipment management terminal reads the equipment information through the equipment library reader and sends it to the central database, and the central database makes a judgment based on the equipment information and inventory status: if the equipment can be stored, the central database updates the equipment status to "in storage", allocates the equipment storage location, and sends the information to the equipment management terminal, and the equipment management terminal prompts the equipment library administrator to place the equipment to the storage location; if the equipment cannot be stored, the central database rejects the storage request and prompts the equipment library administrator that the storage fails; The equipment out of the warehouse step includes: when the equipment is out of the warehouse, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database, and the central database makes a judgment based on the equipment information and inventory status: if the equipment can be out of the warehouse, the central database updates the equipment status to "out of the warehouse", records the equipment out of the warehouse person, the out of the warehouse time and the out of the warehouse reason, and sends the information to the equipment management terminal, and the equipment management terminal prompts the equipment warehouse administrator to take out the equipment; if the equipment cannot be out of the warehouse, the central database rejects the out of the warehouse request and prompts the equipment warehouse administrator that the out of the warehouse fails; The equipment transfer step includes: when equipment is transferred from one warehouse to another, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database, and the central database makes a judgment based on the equipment information and inventory status: if the equipment can be transferred, the central database updates the equipment status to "in transfer", and records the equipment transferor, transfer time, transfer reason and transfer destination, and sends the information to the equipment management terminal, and the equipment management terminal prompts the equipment warehouse administrator to complete the transfer operation; if the equipment cannot be transferred, the central database rejects the transfer request and prompts the equipment warehouse administrator that the transfer fails; The equipment maintenance step includes: when the equipment needs maintenance, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database, and the central database makes a judgment based on the equipment information and maintenance status: if the equipment needs maintenance, the central database updates the equipment status to "under maintenance", and records the equipment maintenance person, maintenance time, maintenance reason and maintenance plan, and sends the information to the equipment management terminal, and the equipment management terminal prompts the equipment warehouse administrator to move the equipment to the maintenance location; if the equipment does not need maintenance, the central database rejects the maintenance request and prompts the equipment warehouse administrator that the maintenance fails; The equipment scrapping step includes: when the equipment cannot be repaired, the equipment management terminal reads the equipment information through the equipment warehouse reader and sends it to the central database, and the central database makes a judgment based on the equipment information and scrapping situation: if the equipment needs to be scrapped, the central database updates the equipment status to "scrapped", and records the scrapper, scrapping time, scrapping reason and scrapping treatment of the equipment, and sends the information to the equipment management terminal, and the equipment management terminal prompts the equipment warehouse administrator to scrap the equipment; if the equipment does not need to be scrapped, the central database rejects the scrapping request and prompts the equipment warehouse administrator that the scrapping fails.

5. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The central database functions include: It has data analysis and report generation functions, and regularly generates reports and feeds them back to each terminal, including tool inventory reports and tool usage reports. The central database has feedback reports to the tool management terminal; Generate personnel attendance reports, task reports and performance reports, and the central database will provide feedback reports to the maintenance personnel management terminal to evaluate and improve the effectiveness and efficiency of equipment maintenance management.

6. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The data exchange process applies data filtering algorithm and data compression algorithm. The data filtering algorithm steps include: Data preprocessing, preliminary processing of raw data; feature extraction, extracting features from preprocessed data; duplicate data identification, based on the time window method, identifying and marking data that appears repeatedly in a short period of time; irrelevant data filtering, based on machine learning models, identifying and filtering data irrelevant to the current application scenario according to the characteristics of the data and the processing results of historical data; The data compression algorithm includes: Adaptive compression algorithm selection: dynamically selects the compression algorithm based on the characteristics of the filtered data, including the amount of data and the type of data; block compression: divides a large amount of data into small blocks and compresses each data block separately; redundant data compression: only store one copy of repeated data blocks and record their location in the data stream; index and metadata management: create an index system to record the compression information, location and decompression method of each data block.

7. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The tool management terminal, maintenance personnel management terminal and equipment management terminal all have voice or display screen prompt functions, which are used to provide corresponding operation instructions and feedback information to operators.

8. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The RFID tag, RFID reader / writer, tool management terminal, maintenance personnel management terminal, equipment management terminal and central database are in the same local area network.

9. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The RFID tags are divided into two types: passive RFID tags and semi-active RFID tags. Passive RFID tags are attached to equipment and tools for close-range information reading, and semi-active RFID tags are attached to maintenance personnel for information reading within the maintenance area.

10. The RFID-based equipment maintenance management system according to claim 1, characterized in that: The RFID readers are divided into two types: low-frequency RFID readers and high-frequency RFID readers. The working range of multiple low-frequency RFID readers covers the maintenance area, and high-frequency RFID readers are installed at the entrance and exit of the area to read RFID tag information.

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