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I. Introduction
RFID (Radio Frequency Identification) appeared in 1940. It was first used in the military and some organizations that have special requirements for identification systems. Due to its high implementation cost and lack of relevant technical standards, it was not immediately applied to the commercial field. It was not until 1980 that this technology was introduced into the commercial field. This article combines RFlD’s data collection system with MES (Manufactu rlng Executlon System) and WMS (Warehouse Management System) and applies it to all aspects of manufacturing logistics, thereby optimizing its logistics process. The basic structure of the logistics management information system from purchase to sales is given, and the basic business operation process of applying RFID is designed to realize the automatic collection of data in the process.
2. RFID-based logistics management information system
The RFID-based logistics management information system can help the manufacturing industry realize real-time tracking of various resources. It can complete the supply of production materials and the adjustment of production rhythm in time. Thereby improving the tracking, positioning and management of resources, and enhancing the automation level and overall efficiency of the manufacturing industry. Its hardware is composed of electronic tags, RFlD readers, RFID middleware, management system servers, and management system workstations.
Electronic tags: divided into active electronic tags, passive electronic tags and semi-automatic electronic tags. The active electronic tag with power supply can be in a dormant state outside the range of the reader. It can be activated when it enters the range of the reader. It can also send signals without interruption. The operating range is 20 to 100 meters: the passive electronic tag uses modulated scattering Way to transmit data. It must use the carrier wave of the reader to modulate its own signal, and the operating range is several inches to 30 feet.
RFID reader: divided into fixed reader and portable reader. Fixed readers are the most commonly used, due to the requirements of size, power supply, power consumption and other aspects. Fixed installations are used, mainly for warehouse and workshop access control to confirm the quantity and batch number of incoming goods. It is also used in workshops , Real-time monitoring of the material consumption of each workshop. The portable reader is a powerful supplement to the fixed reader. It can meet the requirements of field operations, close range, mobile identification, low energy consumption, etc. It is mainly used for location determination and daily inventory inventory. UWB readers are fixed Reader. Mainly used in warehouse to locate and track internal equipment.
RFID middleware vendors currently providing RFID middleware platforms mainly include lBM, Mic rosoft, Oracle, SAP, Sun, etc. RFID middleware mainly includes two levels of functions. The first level is to provide services for the latter two levels to improve the performance and efficacy of RFID on the Internet, and the second level is responsible for communication with RFID hardware devices and reading and writing to RFID The data provided by the device is filtered and sorted.
3. Application of logistics management information system based on RFID manufacturing industry
The advantages of RFID in the manufacturing logistics information system are mainly reflected in two aspects. First, RFID can play a huge role in manufacturing production logistics. It can automatically identify the location and status of materials, semi-finished products, and finished products in various links of production logistics. And transmit this information to MES quickly and accurately. Secondly, improve the accuracy of information collected by the manufacturing logistics information system. Simplify the process of in and out of the warehouse. Know the status of the inventory in time to ensure that the inventory of the goods is more accurate and rapid.
1 RFID carries out real-time monitoring of goods identification and tracking. The production execution system MES can optimize and manage the entire production process from the issuance of production orders to the completion of the product through the transmission of information. When real-time events occur in the factory, MES can respond to these events in time, report them, and use current accurate data to constrain and process them. MES takes the process mathematical model as the core, connects real-time databases or non-real-time relational databases, monitors, diagnoses and controls the production process in real time, completes unit integration and system optimization, and balances materials at the production process level (not the management level). Arrange production plans, implement scheduling, production scheduling and optimization. MES focuses on dynamic management. It is necessary to collect a large amount of real-time data in the production process and adjust it according to site changes. And RFID can quickly and accurately complete the collection of large amounts of real-time data. Therefore, we can carry out real-time control of each production link through the combination of RFID and MES to ensure the smooth progress of production. Through the fixed readers installed in each workshop, the consumption of materials in each workshop is read in real time, and the data is transmitted to the database. The MES will issue instructions to the work locations of each workshop for scheduling according to the real-time monitoring of the data. When the materials in each production workshop drop to a pre-set critical point, MES will issue a replenishment instruction to the WMS. The warehouse can replenish the production workshop according to the instruction. This greatly improves the degree of informatization and automation of the manufacturing logistics management information system. And it can monitor the material consumption of each workshop in real time. To realize the rhythm control of the entire production process and improve the overall efficiency.
2 RFID improves warehouse operations and simplifies processes. It is assumed that the suppliers adopt RFID technology. And the containers or pallets of the goods have RFID tags. Then we can use RFlD to confirm the inbound and outbound information in the three aspects of receiving, inbound flow chart and picking and outbound processes. Daily inventory inventory; real-time monitoring of warehouse equipment.
(1) The RFID access control system is used to confirm the entry and exit information, and a fixed reader and a hand-held reader are used in combination. The hand-held reader is used to read the cargo location and pallet information. The fixed reader can realize the Confirmation of cargo information and pallet information. The application of the two readers can not only realize the recognition of multiple targets during the movement, improve the efficiency of warehouse entry and exit, but also realize the monitoring of the status of goods and pallet containers.
(2) Daily inventory inventory. Hand-held readers are used. Daily inventory is completed by reading labels on standardized and unitized packaging. This not only saves labor costs, but also improves accuracy and inventory efficiency.
(3) The real-time monitoring of warehouse equipment uses UWB readers. UWB readers can determine the location and current status of the equipment in the warehouse. It is convenient for the selection of cargo locations and handling tool lines after the goods are in the warehouse. It can also improve storage efficiency and reduce equipment operating costs.
4. Conclusions and development prospects
This article combines RFID with the manufacturing logistics management information system, so that RFID completes the data collection and sorting of MES and WMS. It improves the material supply and warehouse management process of the traditional manufacturing industry, and realizes the real-time monitoring and tracking of information in all aspects of logistics. Thus, while reducing costs, it also improves production efficiency. It brings significant benefits to the manufacturing industry.
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