I. Project Background
Logistics involves the effective flow of raw materials and finished products from origin to destination. Modern logistics integrates transportation, warehousing, loading/unloading, processing, sorting, distribution, and information into a complete supply chain through "planning, implementation, and control of multiple elements in the entire logistics process." Internationally, logistics is widely regarded as "the last frontier for cost reduction" and "the third source of profit." With the acceleration of economic globalization and informatization, the logistics industry is undergoing a "modern logistics revolution."
After China's accession to the WTO, enterprises need to adopt advanced logistics management concepts and technologies to enhance core competitiveness. However, due to the influence of the planned economy system and the constraints of economic development level, domestic modern logistics practices still lag behind developed countries. In recent years, some enterprises with higher management levels have taken modern logistics as a "new profit growth point," optimizing internal organization and logistics resources.
II. Project Objectives
Traditional warehouse management relies on non-automated, paper-based systems, which are inefficient and limited in scale. Although computers have become popular, data is still "first recorded on paper and then manually entered into the computer," resulting in wasted manpower, slow data entry, and low accuracy.
As enterprises expand, the variety of materials and the frequency of inbound and outbound operations increase dramatically. Traditional models can no longer meet the requirements for speed and accuracy, becoming obstacles to enterprise development.
The RFID-based warehouse management system introduces RFID technology into existing management, enabling automated data collection for each operation link, ensuring data speed and accuracy. Through scientific coding, it can manage item batches, shelf life, etc., and the location management function can grasp the current location of materials.
Benefits of adopting RFID technology:
III. System Architecture
a. System Design Principles
The solution strictly follows the relevant technical specifications and adheres to the following principles:
b. Main System Functions
c. System Design Approach
When items are stored, they are classified by specification and placed in corresponding storage areas. Install identification signs and attach electronic tags (identification labels) for each storage area. Each sign is numbered, and the tag stores the unique ID of the shelf. Staff use a PDA to read the ID to access the backend database and retrieve storage information, including: item type, name, model, unit, unit price, production date, shelf life, performance, etc.
When moving inventory, the system sends a move instruction to the PDA. The moving staff finds the designated location, takes the specified quantity of goods, transports them to the target location, modifies the shelf tag content, and sends move operation information back to the on-site system.
Operators use a PDA to scan inventory identification signs, sending scanning data in real time to the terminal computer. Supervisors perform inventory counting and generate reports.
During warehouse management operations, reading the tag number can determine whether the current operation position is correct. Enter the shelf ID to retrieve relevant information from the online database, enabling material storage management and online browsing and querying.
d. System Composition
The warehouse management information system consists of three parts:
IV. Solution Operation Flow
1. Production and Installation of Location Tags
Unless the location is adjusted or the tag is damaged, generally location tags only need to be produced and installed once.
2. Inbound Operation Flow
3. Outbound Operation Flow
4. Relocation Operation Flow
5. Inventory Operation Flow
6. Data Transmission Method
When warehouse managers perform inbound, outbound, inventory, and relocation operations, they need to transmit data with the system database backend via a handheld PDA.
By reading electronic tag data with the handheld PDA, the PDA receives the signal and sends data via GPRS to a data receiver, which connects to the system terminal via a 485/232 interface, transmitting the received signal to the database to complete the corresponding data update operation.
V. Hardware Equipment Selection
