1 Introduction
As the volume of business continues to grow and customer demand continues to increase, the management of distribution centers is also facing increasing challenges. How to quickly complete the rapid check, collection, outbound, and review of large quantities of goods that are repeated every day; how to reduce inventory costs, strengthen inventory control, increase space, personnel and equipment usage; how to quickly find specified Goods; how to achieve automatic inventory of distribution centers without stopping the business, has become a hot and difficult issue of common concern of various distribution centers.
The current bar code technology has improved the automation level of the distribution center to a certain extent. However, due to the insurmountable defects of the barcode itself, it has little effect in solving the above problems in the distribution center and cannot meet the existing application of the enterprise [2]. Radio Frequency Identification (RFID) technology provides a full automation of the distribution center because of its unique long-distance, non-contact identification, anti-collision, large capacity, fast recognition speed and strong anti-interference ability. may. The global UID serial number of the electronic tag establishes a global logo for each of the smallest units of circulating goods, enabling real-time tracking and management of items throughout the supply chain.
This paper proposes a distribution center system architecture based on RFID technology, adopts a layered approach to system hardware structure design and software structure design, and proposes a new data collection and filtering method, and simulates the distribution center by establishing a small distribution center laboratory. Process to verify the correctness and reliability of the system solution and greatly improve the efficiency of the distribution center.
2 Distribution Center System Integration Design
2.1 Distribution system hardware structure design
The distribution center's workflow usually includes receiving, warehousing, replenishment, picking, sorting, reviewing, and outbound, as shown in Figure 1.
Generally speaking, in each working area of ​​the above distribution center, an RFID reader is installed for data collection and the collected data is transmitted to the central computer system for analysis and processing, and then the next action is guided according to the analysis result. Considering the requirements for the identification distance in the operation of the distribution center, the system should use ultra-high frequency hardware equipment. However, because different working areas in the distribution center are adjacent or there may be overlapping areas, if all UHF RFID systems are applied, the "serial reading" phenomenon between different functional areas will inevitably occur. In order to avoid the difficulty of RF shielding caused by crosstalk, we try to plan high-frequency (13.56MHz) and ultra-high frequency (915MHz) RFID devices in the system, and correlate high-frequency (UH) and ultra-high in the database. Frequency (UHF) electronic tag data information, and through the middleware to coordinate work.
Specifically, in the inbound and outbound areas, inventory areas, and sorting areas, the system uses UHF readers to read multiple electronic tags at a time in a wide range to improve the speed, automation, and inventory accuracy of the distribution center. degree. When replenishing, the reader reads the tote box label for database information update. At this time, the system only needs to read one electronic label at a time, so the high frequency reader is used in the replenishment area to avoid crosstalk. These parts form a fixed data acquisition terminal in the entire RFID system, as shown in Figure 2.
The mobile RFID data acquisition terminal with the forklift as the carrier plays an important role in the distribution center system. The function includes: when the forklift terminal carries the cargo person (outlet) library, the system reviews according to the person (out) cargo order and the actual person (outgoing) goods, and feeds back the review result to the forklift terminal to prompt the next action; The forklift truck RFID reader reads the cargo space label on the shelf to confirm the specific position of the cargo (tray) in the warehouse, facilitating the positioning and inventory of the goods afterwards; a series of RFID tags (landmarks) can be placed on the ground, by reading Landmarks to determine and track the route and location of the forklift at the distribution center. The mobile data acquisition system is composed of an RFID reader and a display terminal, and exchanges data through a wireless local area network (802.11b/g) and a central computer. Since the mobile terminal only needs to read one location tag when performing the business operation, the mobile terminal also adopts a high frequency RFID system, and can avoid crosstalk. The current RFID reader hardware interface usually has two forms: serial port and network port. A single RFID application system only needs a serial port to meet the demand, and multiple sets of complex application systems require a network interface to facilitate device networking. According to the different communication interfaces provided by different readers, the system designs and integrates multiple communication modes, and communicates with the host through hubs and multiple serial ports.
2.2 Distribution system software structure design
The software structure of the distribution system consists of the RFID data acquisition system, middleware, and back-end warehouse management system (wMS) in each front-end area. The system software structure is shown in Figure 3.
In FIG. 3, the front-end RFID data acquisition system completes the collection of the electronic tag data; the middleware processes and formats the collected data, and encapsulates different frequency devices and different communication modes, and provides an interface to the back-end WMS. System; WMS unified management of various business operations of the distribution center. The storage management module completes the location allocation, the purchase review and the customized order operation; the inventory management module completes the pallet cargo inquiry, the cargo position inquiry, the fluent shelf management and the cargo position inventory operation; the delivery management module completes the delivery Solution selection, sorting display, outbound review and custom order operation; resource management module completes pallet management, location management and forklift management operations; report management module uses for inbound management, inventory management, outbound management and forklift management Management operations such as customization, query, modification, and deletion are performed with the generated data tables. When the system is running, WMS first analyzes and counts the data collected in the inbound area, completes the distribution of the goods received, and guides the forklift to complete the correct storage of the goods through the display terminal. The WMS uploads to the RFID system of other areas at the same time. The information is related to the operation, and the efficient management of the goods, turnover boxes, pallets and forklifts is realized.
We are professional manufacturer of Milk Pot Cooking, Milk Pot Stainless Steel, Milk Pot Design. We focused on international export product development, production and sales. We have improved quality control processes of Stainless Steel Milk Pot to ensure each export qualified product.
If you want to know more about the products in Stainless Steel Milk Pot, please click the product details to view parameters, models, pictures, prices and other information about milk pot cooking, milk pot stainless steel, milk pot design.
Whatever you are a group or individual, we will do our best to provide you with accurate and comprehensive message about Stainless Steel Milk Pot!
Stainless Steel Milk Pot
Milk Pot Cooking, Milk Pot Stainless Steel, Milk Pot Design
HLCY E-Commerce Co., Ltd. , https://www.sthlcy.com