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1. Requirements and analysis
1.1 User needs
1.1.1 Problem analysis
Material warehousing plays a vital role in the logistics supply chain. If the correct purchase and inventory control and delivery cannot be guaranteed, it will lead to an increase in management costs, and it is difficult to guarantee the quality of service, which will affect the competitiveness of enterprises. The traditional material storage management system pays attention to the registration and management of the goods in and out of the warehouse and the statistics of the quantity of goods. After a long time, the location of the goods will be disordered, which makes it difficult to find the goods. It requires a lot of manpower to regulate the placement of goods, regular inventory and inventory Work such as warehousing and exit registration makes the storage management problem very cumbersome, wastes a lot of time, and increases management costs.
RFID (Radio Frequency Identification, radio frequency identification technology), as an emerging non-contact automatic identification technology, automatically recognizes targets and obtains related data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. Recognize high-speed moving objects, and can recognize multiple tags at the same time, and the operation is quick and convenient. Therefore, RFID technology has become the main direction of global automatic identification technology development in the 21st century.
One of the basic tasks of the digital construction of materials warehousing and logistics is the collection of basic data. The authenticity and completeness of basic data are the key and bottleneck related to the success of the digital construction of warehousing and logistics. The emergence of RFID has solved this problem in a timely manner. The use of RFID warehousing logistics management system to implement full-process control management for each link of the warehousing, standardized operations for each link such as warehousing, outgoing, inventory, etc., can effectively manage the warehouse process and space, realize batch management, and fast in and out Warehouse and dynamic inventory; help warehouse managers to carry out comprehensive control and management of the operations such as storage, removal, movement, inventory, and ingredients of inventory items, effectively use warehouse storage space, improve warehouse storage capacity, and use materials Realize first-in-first-out, ultimately improve the utilization rate of warehouse storage space, reduce inventory costs, and enhance market competitiveness.
1.1.2 Demand analysis
1.1.2.1 User needs of material warehouse management system
The material warehouse management system is a management software developed for the collection, warehousing, shifting, outgoing, and inventory query of the company’s materials. According to the requirements of the company, it can realize the collection management, warehousing management, and migration of the warehouse. Library management and inventory management and user management and other functions. Users can update, delete and query the basic conditions of the materials in the warehouse through the corresponding modules, manage the receipt, warehousing, transfer, delivery and inventory of materials, query the details of each functional module, and use the Users of the system update, delete and inquire, query the inventory quantity, and monitor the warehouse situation in real time. The users can easily manage materials through simple tasks.
1.1.2.2 Description of functional requirements of material warehouse management system
i. Material location tracking and alarm
* Valuable materials location tracking
*For valuable materials, it is necessary to provide a location tracking function, record the area information where it is located (not precise location, only need to know that it is in the area), and the system will check based on this information. If it is found that there is no equipment in the area, Then send an email alert to the person in charge.
* Call the police
* When materials need to be transferred from a certain area to other places, passing through the warehouse entrance and exit, the RFID reading device automatically reads the information, records the information in the back-end database, and gives an audible and visual warning prompt, and the security personnel will manually check and pick it up or transfer it one.
ii. Auxiliary management functions
* RFID tag management
*Provide RFID label issuance and update content functions. In addition to the RFID electronic content, a printed label is also required outside the RFID to prevent the loss of the RFID label and the inability to obtain information.
*Material inventory
* For active RFID tag equipment in the control area, real-time inventory function is provided, and the area and quantity of materials are known at any time.
iii. Information management of material ledger
*Information system integration
*Integrated with RFID hardware and related modules, organically combined through data interaction specifications
*Integrate with asset management system, share data, reduce data repetitive maintenance, and maintain a unified data source
* Make full use of ASB’s existing system resources (hardware/software) to reduce investment costs
*Current EXEL offline operation information
*At present, the manual offline data entry operation in EXCEL is electronic.
iv. Query statistical reports
*Real-time monitoring report
* For real-time statistical areas, the system provides real-time statistical reports and difference reports.
*Summary of materials
* Current material status (borrowing, inventory, transfer… etc.), quantity, idle time, RFID tag used limit, etc.
* Provide a summary table for the classification of materials
* Single or batch query of materials
* Provide single or batch query methods with different conditions to obtain the material label, user, maintenance history, and historical requisition, etc.
1.1.2.3 Description of non-functional requirements of material warehouse management system
*RFID tags need to consider anti-reflection and other measures to adapt to the situation where the materials are metal surfaces
*RFID active tags need to balance power and service life
*The service life of RFID tags is not less than 3 years, and provides a cost-effective update method after the service life expires (such as changing the battery or uniformly changing the label, with low battery voltage alarm)
* RFID-related hardware equipment must have high compatibility to facilitate future expansion and maintenance of the system.
*RFID hardware and application software are separately given implementation installation, deployment/debugging costs
* Clarify the maintenance period and the support mode outside the warranty period and including fees
* For some functions of business customization, the software needs to be based on Microsoft technology, easy to maintain and easy to expand, and users can enhance their own functions according to business needs
Two, the system plan
2.1 Solution advantages
2.1.1 Technical advantages
The RFID technical solution is composed of an active RFID tag (Tag) and a reader (Reader). The tag periodically sends out the ID information of the tag. After receiving the information within the range of the reader, the The ID information is transmitted to the background to realize the identification of the tag information.
2.1.1.1 High stability of technology
The RFID system is composed of system software, central station equipment, data transmission equipment, data communication interface, card reader, tag and other products. Among them, data transmission equipment, data communication interface and card reader substation are all maintenance-free products with stable performance Very high performance, first of all to ensure the reliability of the main equipment. Even under severe weather conditions, in addition to man-made damage, the high reliability of the product can be guaranteed, and the transmission and transmission of internal data can be absolutely correct.
2.1.1.2 Anti-interference of equipment
The use of active tags can minimize the interference of external factors such as the natural environment on wireless signals, while the use of passive RFID will greatly affect the reliability of card reading due to changes in the external natural environment or the surface of the tag is covered by dust.
2.1.1.3 The design of wireless anti-collision technology prevents the loss of data
In a general monitoring system, the most difficult situation to deal with is the situation where multiple monitoring targets gather at the same time. The tag emits radio waves to the card reader station at the same time, which will cause information conflicts in an instant, such as processing Not good, resulting in loss of information, affecting the accuracy of monitoring, and the company’s RFID technology is processed by the radio frequency high-speed module, which can monitor the aggregated target without leakage. The company’s RFID system uses wireless anti-collision technology and time-domain anti-collision technology. , The conflict information is processed in order to ensure the complete collection and processing of each information.
2.1.2 Design advantages
2.1.2.1 Auto-sensing, controllable distance
Auto-sensing refers to the use of reliable communication between active RFID tags and reading devices, as well as low-frequency induction technology to control the effective sensing range, so that the ID of the tag entering the sensing area is automatically uploaded to the card reading device.
2.1.2.2 Leading design level
The company’s solution is the crystallization of our company’s many years of technology accumulation in the active RFID industry and location monitoring field; it follows the design concept of telecommunication-level systems and equipment, and emphasizes the network capability and high reliability of the system; adopts RFID technology based on the company; In the hardware design, reliability, safety and lightning protection measures have been fully considered, and strict certification and testing have been carried out to comply with the safety and electromagnetic compatibility standards of the relevant international and national industry regulations;
2.1.2.3 Powerful network management function
Based on an open platform, with rich functions, flexible interfaces, and support for GIS systems;
In addition to the alarms generated by the system itself, it can access and manage the alarms of other systems such as data monitoring;
2.1.2.4 High reliability design
The company’s system is a system with high security requirements. Various alarm information and data must be reported to the monitoring center in real time without fail. The solution has carried out a more thorough consideration of system security and stability, which is mainly manifested in:
The equipment, devices and devices used in the system have undergone a complete set of certification tests.
The alarm information is transmitted in real time, which is visible and audible, and can be used for paging by mobile phones, ensuring that user equipment failures and alarms are discovered and eliminated in time.
The self-produced equipment has passed strict internationally certified laboratory tests for lightning protection, electromagnetic radiation, and anti-interference to ensure the stable operation of the system.
2.1.2.5 Good maintainability
The company’s solution is characterized by low maintenance. The main reason is that the on-site equipment adopts a highly modular design, the equipment is highly reliable, and the network basically does not require maintenance. This solution greatly reduces the types of equipment, makes the entire network structure very simple, and can greatly reduce maintenance costs in daily maintenance.
2.1.2.6 Good compatibility
The company’s solutions have good compatibility and can be connected to a variety of alarm devices. The front-end system can be modified on the basis of the existing analog monitoring system, making full use of the user’s existing equipment investment. At the same time, the company’s solutions can be linked with alarm systems, entrance and exit control systems, etc., when combined with other systems, through system integration design, each system is compatible with each other and can work independently.
2.2 System Architecture
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