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1. Project background
Aviation maintenance is a delicate operation. The quality, accuracy, and completeness of maintenance tools affect the quality of aircraft maintenance and thus affect flight safety. The scientific management of tools can ensure that the tools are effective and available, and that the tools are intact and will not be missing. Therefore, research on the scientific management of tools must be carried out. The various tools used in the aircraft maintenance process, like the materials and equipment, are the right arms of the aircraft maintenance personnel. In daily maintenance work, hundreds of tools are often used. They have a wide variety, complex specifications, and a large number. Therefore, the scientific management of tools is of great significance to the safety of production, improvement of labor efficiency, improvement of maintenance quality, reduction of labor intensity, and acceleration of liquidity turnover.
At present, the main task of tool management for maintenance units is to supply suitable tools to maintenance teams; to do a good job of classification and numbering of tools; to establish and improve the inventory system of tools; to repair and replace tools that need to be repaired and replaced in a timely manner. However, due to the lack of adequate information technology, it is still in the initial stage of manual management, and there are many tools that have been lost by maintenance organizations.
RFID radio frequency identification technology uses the principle of radar reflection to send a microwave inquiry signal to the electronic tag through the antenna. The electronic tag is activated by the microwave energy of the reader, and responds after receiving the microwave signal and sends out an echo signal with the tag data information. The basic feature of radio frequency identification technology is to use radio technology to identify stationary or moving objects, to determine the identity of the object to be identified, and to extract the characteristic information (or identification information) of the object to be identified.
2. Advantages of the program
The management of aviation aircraft maintenance tools based on RFID technology can become an important part of advanced airlines. With the rapid development of the aviation industry today, it is of great significance to apply RFID radio frequency identification technology to the management of aircraft maintenance tools. Using its management and control of management maintenance tools can ensure the smooth development of the entire maintenance work and ensure the safety of aircraft operations.
1. The scientific and advanced automatic identification management replaces the previous manual bookkeeping management to improve the management level.
2. The accuracy performance is greatly improved, and the advanced mechanical operation replaces the artificial eye viewing operation.
3. Work efficiency has been further improved.
4. The software and hardware operations are simple and easy to understand, and the hardware functions and software processes are clear and clear.
Third, the overall planning and design of the system
3.1 Overall system architecture
The core of this solution is based on RFID radio frequency identification technology. The system mainly consists of RFID electronic tags, RFID card issuers, RFID fixed readers, RFID handsets, application servers and data servers. In the aviation maintenance tool management system based on RFID technology, the RFID card issuer completes the initialization of the RFID electronic tag, and the fixed reader implements the batch automatic warehouse management of tools. RFID handhelds can be used for inventory management.
Fixed readers are installed on both sides of the tool library door to form a scanning channel. When a tool with an RFID electronic tag passes through the door, the reader reads the tool’s electronic tag related information and uploads the data to the back-end central database. The central database processes and records relevant information, so as to realize the management of aviation materials.
RFID handhelds are used by warehouse administrators to count inventory tools or perform some mobile data collection operations. The data information read by the handheld computer is transmitted to the back-end central database through the wireless network to realize the relevant exchange of data information.
3.2 System flow
3.2.1 Card Issuing System
The card issuing system is used to bind tool information with electronic label information and enter it into the database system. The main method is to use an RFID card issuer to encode the tool information and write it into the electronic tag, and then install the electronic tag on the tool to complete the binding. The basic process is as follows:
3.2.2 Tool borrowing
Borrowing is the beginning of the use of tools. It refers to a series of use links that the maintenance personnel propose to borrow tools according to the actual production situation, after the maintenance personnel find the tools, read the tool information, register, generate the tool borrowing list, and borrow the tools. Operation process. Here, lending tools is mainly for tools that are borrowed from the tool library to be used by maintenance personnel, and it is necessary to find, register, and lend to them.
The tool lending process is as follows:
Operation process: The maintenance personnel obtain the corresponding tool requirements according to the production requirements, log in to the system to find whether the required tools are in the tool library, if the search result is that the required tools are in stock, the maintenance personnel will bring out the corresponding tools according to the storage location , When passing through the warehouse, the information of all loaned tools is read out in batches and registered, the production tool borrowing form, prompts are given, and the service of loaning tools is completed after verification by the maintenance personnel.
3.2.3 Tool return
Tool return is mainly responsible for registering and returning the tool with the tool information corresponding to the information on the borrowing form. If the tool is damaged, fill in the tool damage report and transfer it to the tool storage management process.
The tool must be returned by the authorized maintenance personnel. When the tool manager registers to return the tool, the entire tool on the borrowing list is returned in place before the system can close the borrowing list. The tool return flow chart is as follows:
The process operation is similar to that of tool lending. The tool to be returned is carried by the maintenance personnel through the RFID scanning channel of the warehouse door. The system automatically reads all tool information and checks it with the lending list in the background. The return result is confirmed by the maintenance personnel. , The tool borrowing list is automatically closed, and the tool borrowing and returning process is completed.
3.2.4 Tool inventory
Tool inventory is mainly the work of inventory management personnel to regularly inventory tools. The warehouse management personnel download the inventory tool list in the system to the RFID handheld device, hold the handheld device, and go to the corresponding warehouse to check the tools.
3.3 Deployment of key equipment
Deploy RFID fixed readers at the door of each warehouse where tools are stored, and at the same time carry out radio frequency planning according to the on-site environment, and support the installation of up to four antennas on the left and right to form a scanning channel. When aircraft maintenance tools equipped with RFID electronic tags enter and exit each warehouse door individually or in batches, the system counts the tool information entering and exiting each warehouse in real time to realize real-time control of tool information.
For tools stored in the warehouse, when staged asset inventory is required, the electronic tag information on all tools in the warehouse can be read in batches and remotely through RFID handheld devices, and the asset data statistics can be completed quickly and efficiently.
Four, hardware equipment selection
4.1 RFID fixed reader
FU104 UHF RFID reader is a high-performance UHF UHF electronic tag reader based on Impinj R2000 chip. It has a completely independent intellectual property design, combined with a proprietary high-efficiency anti-collision processing algorithm. At the same time, it realizes the fast read and write processing of the electronic tags. It can connect up to 4 antennas to work at the same time. The coverage is wider and the lower cost can realize the real-time monitoring and tracking of the largest number of tags. It can adapt to various harsh conditions. In an industrial environment, the dual optimization of good power consumption and heat dissipation can ensure long-term stable operation of the equipment without electricity, which is suitable for the requirements of the airport application system for equipment stability.
4.2 RFID handset
In this system, the handheld device is mainly used for rapid identification, positioning and inventory of tools. It involves more functions and has a wide range of applications. This puts higher requirements on the RFID reading module in the device.
Yueran HA500 UHF dense cluster reader handheld terminal is an industrial RFID handheld terminal that integrates ISO18000-6C (EPC GEN2) external UHF RFID module. It has an excellent multi-tag anti-collision algorithm, which is especially suitable for warehouse inventory. ; Its unique adjustable power from -5dbm to +30dbm can be conveniently applied to the precise positioning of tools, which provides a guarantee for fast searching of designated tools.
4.3 Tools to manage RFID electronic tags
In this system, the electronic label plays the role of marking and identifying tools, which is the basis of the entire project. Shanghai Yueran launched a dedicated electronic label product for tool management applications, which has excellent product performance and meets the actual needs of the project.
Five, about us
Shanghai Yueran Information Technology Co., Ltd. (“Yueran Information” for short) is a technology-based enterprise specializing in the application of RFID automatic identification technology and Internet of Things data collection related technologies, with many years of industry experience. Relying on RFID products, the company is committed to organically combining the Internet of Things technology with “Internet +”, providing customers with the most cost-effective products, and constantly exploring the application fields of RFID technology. Welcome to inquire and exchange.
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