In general, RFID systems consist of three major components: electronic tags, readers, and data management systems. The electronic tag consists of an antenna and an RFID chip. Each chip contains a unique identification code for representing the object to which the electronic tag is attached. The reader is used to read and write the information in the electronic tag, and the reader writer communicates with other computers or systems through the network to complete the information acquisition, interpretation and data management of the electronic tag. The data management system mainly completes the storage and management of data information. It can be served by a simple small database, or it can be a large-scale ERP database management software that integrates an RFID management module.
In terms of read/write speed, RFID technology has features such as high speed, non-contact, non-directional requirements, multi-target recognition, and motion recognition. In terms of physical characteristics, RFID technology is waterproof, magnetically resistant, resistant to high and low temperatures, bendable, and free Mechanical failure, long life, resistance to harsh environments, etc.; in data storage, RFID technology information storage capacity, data can be updated at any time, read and write; In data security, RFID technology uses a dedicated chip, a unique serial number, Key authentication is extremely difficult to duplicate and ensures security. RFID technology also has a variety of packaging methods. The shape is easy to miniaturize and diversify, and it can be easily embedded or attached to goods, and it is easy to use.
II. Development of RFID product market
Different frequency bands of RFID now have different market developments: Low-frequency RFID technology below 13.56 MHz has accumulated more than 10 years of mature experience; currently the industry is most concerned about RFID technology located in the high-mid band. High-frequency domestic technology gradually matures, is actively promoting the application of the system; 860MHz ~ 960MHz UHF RFID technology is developing the fastest, but the domestic industry technology is not yet fully mature, the need for various demonstration and application plans to drive. The 2.45 GHz and 5.8 GHz frequency bands are susceptible to interference due to product congestion, and the technology is relatively complex. Its related research and application are still at an exploratory stage.
The demand for China's RFID market is huge, and the domestic RFID industry has developed rapidly in recent years. Electronic tag and chip R&D institutions have now developed domestically produced HF and UHF electronic tags, and have achieved mass production in a mature manner and have been widely used in various industries. The reader-writer and terminal have already achieved large-scale production. In recent years, it has developed rapidly. However, there is a certain gap between the overall performance index and foreign similar products.
With the peak demand for RFID in China’s second-generation ID card projects retreating, access control, traffic and IT asset tracking systems have become the most robust RFID market in China. RFID applications in industrial automation and pharmaceutical industries will slow down. This will lead to a reshuffle in the RFID industry. More compatibility and consolidation will occur in the RFID market in the future.
III. Application of RFID Technology in Security Industry
1. Access Control System and Time Attendance System
Access control is the most widely used field of RFID in the security industry. RFID technology is often used in physical access control systems for many government, business, and campus institutions. These systems can be simple access control solutions, or they can be extended to multi-function card solutions such as e-purses or book borrowing.
At the entrance of large conferences and at the entrances of important event venues, open access control systems are installed. When participants or other personnel entering or leaving the passage pass, the system automatically senses the RFID electronic label invitations or identity cards held by personnel. Confirm the identity of the person entering or leaving the room. The legitimate users pass through the system and the identity information of the personnel and the photos taken at the scene are displayed on the screen at the same time. The guards who are on duty can confirm the situation. When a person without a relevant identification document or a person holding an illegal document passes, the system equipment will prompt an alarm, and the security personnel can prevent it from entering in time. For sports venues, concerts and other recreational facilities, RFID systems can provide a series of access control functions for ticket management. This can reduce the losses caused by ticket forgery. Tickets can be made from bar code printers using simple cards with RFID technology. At the same time, RFID cards can be made into membership cards, monthly cards, or annual cards; and tickets can be read on the body without being released. Open access control management.
The RFID open access control system not only has all the features of the traditional ordinary access control system, but also has the characteristics of open multi-person rapid passage and simultaneous recording of each inbound person's personal information. When the person wearing the radio frequency ID card passes through the gate, the information in the identity card is automatically collected by the system and no manual intervention is required, making the access control management more convenient. Electronic tag cards have a long service life, can be read and written more than 100,000 times, and have a service life of more than ten years.
In practical applications, in order to achieve a more secure use effect, the application of open access control systems often includes the integrated application of open and non-open access control systems. Among them, open access control systems mainly include parts of RFID tags, reading Antenna section, video access image comparison verification section, upper computer software control four parts and remote control software based on LAN/WAN.
RFID rapid attendance system adopts 13.56Mhz international standard ISO15693 standard RFID technology, detection and reading distance can reach 1.2 meters, easy to achieve crowded crowds fast attendance; employees do not need to hold a card to attend card attendance, can pass at the same time more than one person, 50 cards can be recognized at the same time every second.
2. Parking Management
RFID technology provides independent, uninterrupted system services for the management of parking lots, ensuring that only licensed vehicles are allowed to pass through, enabling digital management of parking services and fee collection. The parking management system using RFID technology can realize the control of all vehicles on the site and realize computerized information management of vehicles. Under unattended conditions, the system automatically records the time and number of vehicles entering and exiting the vehicle, and provides complete time for entry and exit. Record, strengthen the control and management of vehicles with demurrage charges, speed up the timely search and delivery of vehicles, and other functions, and can also use a portable reader to collect information on garage conditions and parking spaces. At present, there are thousands of RFID parking fee systems in use throughout the country.
Iron Disulfide For Lithium Iron Sulfide Batteries
Pyrite Used in Lithium Batteries as Battery Anode Materials
Material for lithium battery cathode
Place of Origin: Henan Luoyang, China
Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder.
Product Description:
Detailed introduction: it is used as cathode material for lithium battery, which has the advantages of low cost, large capacity, environmental protection and good voltage platform.
The high-grade pyrite is used in lithium batteries as battery anode materials, with benefits of lower cost, large capacity, environmental protection, better voltage platform. Etc.
Quality:
S: 48%min, FE: 42%min, SIO2: 3.0%max, PB: 0.1%max,
ZN: 0.1%max, AS: 0.1%max, . C: 0.3%max, CU: 0.2%max,
H20: 1.0%max, SIZE: 95%min
Granularity: (0-3)mm/(3-8)mm/(3-15)mm/(15-50)mm or other particle size.
Packing: 25KG/500KG/1000KG/BAG or 1000KG/BAG or other packaging.
Note: if there are special requirements, the product can be customized according to clients` requirements.
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