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1. Project background
The RFID-based warehouse management system is mainly composed of card readers, tags and professional management software. It has multiple functions such as portal access control, real-time monitoring of items, and security and anti-theft alarms. It mainly facilitates the management and statistics of items and greatly improves warehouse management. The efficiency, thereby providing users with an efficient and economical working environment. It has realized communication automation (CA), office automation (OA) and management automation (BA) in terms of function. Based on the integrated wiring system and the computer network as a bridge, it fully realizes the integrated management of communication systems and office automation systems.
The system has the following characteristics:
※ Apply RFID technology to realize the life cycle management of equipment from purchase to scrap.
※ From purchasing, warehousing, transferring, inventory to scrapping, realize the automation of asset identification.
※ From the physical point of view, it is compared with the financial account, and the two correspond to each other. In the true sense, the account, card, and property are consistent.
※ By using suitable RFID tags, equipment/personnel can be tracked to ensure that expensive equipment can be obtained anytime and anywhere when needed.
※ The fully visualized information platform provides users with the convenience of timely grasp of asset conditions, rational allocation of resources, and realization of tracking of non-networked tangible resources.
※Fixed asset management” function effectively manages the quasi-fixed assets that have not been converted, and makes up for the shortcomings of the original bar code asset management system.
※ The system integrates the asset, financial and business management departments through a centralized management operation mode, aiming to establish a unified, effective, real-time and electronic process asset resource management system.
※ It saves time for inventory of fixed assets and improves the efficiency of inventory of fixed assets.
※ Strengthen quasi-asset management to avoid repeated purchases and waste.
※ The powerful RFID information collector can record more asset-related information and assist in the refinement of asset management.
※ Asset management is more flexible and accurate. Through the large amount of RFID information and the characteristics of modification, the visualization of asset status is realized.
※ RFID can record the dynamic information of assets, such as: equipment configuration, requisition and return records, main components, annual inspection status, etc.
2. Introduction to RFID technology
RFID is the abbreviation of Radio Frequency Identification, which is a non-contact automatic identification technology. RFID can be traced back to the Second World War (around 1940), when the main function of RFID was to distinguish between enemy and British aircraft. In recent years, with the development of large-scale integrated circuits, network communications, information security and other technologies, as well as the promotion of the world’s number one retailer Wal-Mart and the US Department of Defense, RFID has been rapidly applied to smart grids, transportation, logistics, medical and health, Fine agriculture and animal husbandry, finance and service industry, industry and automatic control, smart home, environment and safety inspection, public safety, national defense and military, smart city and other industries and fields.
RFID uses radio frequency signals to automatically identify target objects and obtain related data. It is mainly composed of an electronic tag (Tag), a reader (Reader), and an antenna (Antenna). The tag is composed of a coupling element (also called an antenna) and a chip. Each tag has a unique electronic code (EPC), and the chip can store a specific serial number and other information. The reader is the connection bridge between the tag and the software system. On the one hand, it reads the tag information, and on the other hand, it communicates the reading result with the software system. The antenna exists in the tag and the reader, and is responsible for the data transmission task from the tag chip to the reader to the software system.
RFID technology is divided into low frequency, high frequency, ultra high frequency, active, etc. according to frequency band. RFID technology has non-contact, fast scanning, high identification efficiency, not easy to be damaged, suitable for harsh environments, convenient operation, fast reading and writing speed, Large amount of information storage, one card for multiple uses, anti-collision, good security and encryption performance, reusability, tracking and positioning characteristics.
UHF RFID is mainly used in this scheme, which can realize long-distance reading.
3. System application architecture
The system application architecture is divided into three logical levels: acquisition layer, application layer, and presentation layer.
◎ Acquisition layer: Readers (fixed readers, handhelds, card issuers, etc.) read the electronic label data, and then transmit it to the ERP system through the network, etc.
◎ Application layer: Realize the application of warehouse management and asset management on the basis of RFID system.
◎ Presentation layer: Users can log in to the system through ERP systems, computers, handhelds, etc., to manage data.
4. Electronic label scheme
We choose different labels according to the materials of daily products and assets. For general goods, we recommend using Label, and for metal goods, we recommend using anti-metal labels. The picture is as follows:
work flow chart:
5. Asset management system
The RFID asset management system uses radio frequency technology (RFID) to equip each fixed asset with an electronic tag with a globally unique ID number, and uses a handheld reader for asset inventory, which can quickly read the electronic tag information on the device. The read tag information is sent to the background server for processing through the built-in communication wireless communication module.The fixed reader is used for access control. The antenna adopts a circularly polarized antenna to ensure multi-angle tag recognition. The installation of the reader at the elevator entrance (stairway) can achieve asset tracking.
Tracking, real-time tracking of the floor where assets enter, and at the same time, realizing all-round and accurate supervision of fixed assets from the aspects of new addition, allocation, idleness, scrapping, maintenance and inventory, combined with asset classification statistics and other reports to truly realize “accounts, cards, materials” Match.
This solution is mainly to install RFID equipment at the stairs to locate the assets in the office building and know the location of the assets at any time.
According to the data of the RFID handset and the data in the database, the normal or abnormal data is processed, and the actual situation of the fixed assets can be obtained. The inventory profit schedule, inventory loss schedule, and Inventory summary table.
5.1, system advantages
The whole system has the characteristics of long-distance rapid identification, high reliability, high confidentiality, and easy operation. The advantages are mainly reflected in the following aspects:
* RFID technology is simple to operate and more effective
The traditional management method is to read each tag at a short distance, which is inconvenient to operate; now it is non-contact reading and writing, which can reach several meters or even ten meters, which is more convenient to read.
* Strong anti-pollution performance and durability
The current UHF tags are durable, not easily damaged, can last as long as ten years, and have strong anti-pollution performance.
* reusable
The RFID tag can repeatedly add, modify, and delete the data stored in the RFID tag to facilitate the update of information.
* Penetrating and unbarred reading
RFID is capable of penetrating reading and penetrating communication.
6. Introduction of key equipment
6.1 RFID reader
Key performance advantages:
1) The certified EPCglobal class 1 second-generation UHF RFID protocol supports intensive read-write mode;
2) Comply with ISO 18000-6C UHF RFID standard;
3) Support LLRP, MACH1 and SNMP protocols;
4) It has 2/4 ports, and each port can be connected to a transmitting and receiving antenna at the same time. This configuration shows the industry’s leading performance;
5) Support RS-232 serial port and RJ45 network port;
6) Up to 1100 tags can be read per second;
7) Contains Linux operating system;
8) The receiving sensitivity can reach -80dBm;
9) Support all Gen 2 standard commands, including write, lock and delete;
10) The working mode can be adjusted by automatically setting commands according to the different dense environment of the site;
11) The working frequency is 920MHZ~925MHZ, which meets China’s frequency standards;
12) Can distinguish the direction of entry and exit of the label;
13) The working temperature is -20~+55 ℃, and the storage temperature is -20~+85 ℃.
6.2 Handheld
Features:
* Impinj Indy R2000 Reader chipset
* Compatible with EPC Class1 Gen2 / ISO18000-6C
* Adjustable output power, maximum 28dBm
* Reading distance up to 7m (4×1 inch tag)
* Integrated Wifi 802.11b/g
product description
ZY-H2000 handheld reader supports ISO 18000-6C (EPC C1 G2), supports built-in Windows CE 6.0 operating system (standard configuration does not include system license), and can be equipped with a variety of functional modules to meet different needs. ZY-H2000 integrates a variety of mainstream wireless communication technologies, integrates 802.11b/g wireless network, Bluetooth radio frequency module (optional), GPRS (optional) and a barcode module that supports one-dimensional and two-dimensional barcodes (optional). Superior RFID and bar code collection functions provide users with convenient services. ZY-H2000 can be connected to the charging base to exchange synchronous data with PC through the USB interface to realize real-time communication. It supports up to 32G Micro SD (T-Flash) card expansion. The ZY-H2000 can work on UHF tags up to 7 meters, with a battery life of 4 hours, which fully guarantees mobile operations in various environments.
Applications
This device is an RFID handheld reader based on Windows CE 6.0. This product has the advantages of low power consumption, multiple data interfaces, and simple human-computer interaction interface. It can be widely used in RFID systems, typical applications have:
* Logistics and warehousing management: logistics industries such as item flow and warehousing management, as well as post office flow management systems for mail, parcels, and luggage transportation;
* Supply chain application areas: application of goods supply process, etc.;
* Product anti-counterfeiting detection: Use the write protection function of the tag’s internal memory to identify the authenticity of the product;
* Other fields: It has been widely used in club management, library, student registration, consumption management, attendance management and other systems.
6.3. Desktop UHF Reader
Model: Ziytek D500 Desktop Card Issuing Machine
* RFID card issuer is a card issuer developed by our company. This card issuer is suitable for reading a series of electronic tags working in the UHF frequency band.
* RFID card issuers can be used in conjunction with a series of electronic tags to be widely used in tobacco logistics, access control management systems, urban vehicle automatic identification management, highway non-stop toll collection and material management applications.
* The RFID card issuer has a built-in small antenna. As a card issuing device, the typical distance for reading electronic tags is 10cm.
The function of the system:
* Read the ID number or EPC code in a single electronic tag;
* Read and write data in the user data area of the electronic label;
* Good anti-collision performance, can read the ID number or EPC code in multiple electronic tags at the same time;
* Provide USB interface for data communication and power supply for card issuer;
* LED lights indicate the power supply and working conditions of the card issuer.
6.4, electronic label
Impinj uses Monza 4 chips to make labels with excellent performance and good receiving sensitivity. They are widely used in global supply chain management, warehousing, and asset management.
6.5, reading antenna
The A9028L/R30NF antenna using Laird technology is a circularly polarized panel antenna, which provides signal reception and transmission technology in the 902-928M frequency band. Both the standing wave ratio and the axial ratio are excellent. For this type of antenna, users are allowed For maximum performance. The antenna is installed in a heavy-duty radome shell and can also be directly mounted on the wall, allowing any wall or mast installation. The antenna is to provide an integrated coaxial pigtail and multiple types of connectors to choose from.
characteristic:
* Ultra thin
* Very low VSWR and shaft ratio
* Weatherproof cover
* Wide selection of connectors and cables
* Left-hand and right-hand polarized PC version
Application occasions:
* storehouse
* Airport Hospital
* Transportation terminal
* Conveyor belt
* Logistics management
* Personnel management
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