With the rapid development of science and technology, the security technology is also constantly upgraded. The application of RFID technology in the access control system not only promotes the technical innovation of the access control system, but also promotes the open development of the access control system. RFID electronic tag card, RFID card is cheap, easy to use, high security and can be well managed with a database, its cost performance is very high, and it has a good prospect for promotion.
The rapid development of RFID technology, the diversification of RFID products in various frequency bands, and radio frequency identification technology have been recognized by RFID manufacturers and continue to reduce costs, driving various RFID products into our daily lives.
Different RFID electronic tags can be used in different occasions, which can realize multi-target recognition, moving target recognition and remote real-time monitoring and management. The communication distance can be from a few centimeters to tens of meters. Its main advantage is that it has strong environmental adaptability and is less affected by rain, snow, hail, and dust. It can work around the clock and complete automatic identification, tracking, and management without contact. It can penetrate non-metallic objects for identification, and has strong anti-interference ability.
RFID access control systems have long gone beyond traditional doorway and key management functions. The safety requirements of modern working environments, departmental administrative management work, daily attendance management, and company catering consumption are all closely related to the access control system. Installing RFID access control systems in some office places, residential apartments, and other public entrance and exit channels can effectively prevent unauthorized people from entering and maximize the security of these places.
The RFID open access control system not only has all the functions and features of a traditional ordinary access control system, but also has the characteristics of an open multi-person fast passage and simultaneous recording of the personal information of each person in and out.
When a person wearing a radio frequency ID card passes through the gate, the information in the ID card is automatically collected by the system without manual intervention, making access control management more convenient. The electronic tag card has a long service life, can be read and written more than 100,000 times, and the service life is up to more than ten years.
Automation, informatization, and intelligence have become the needs of the development of the times. Infinite technology and computer technology have also continued to develop. The Internet of Things industry is becoming more and more widely used. The RFID access control system is a good reflection of the practicality of the Internet of Things. The RFID access control system has high security and reliability, and is easy to use.
Legend has it that fine stones can sing, can stones make paper? The answer is yes, the waste of coal gangue can make paper is no longer a fantasy. The box made of coal gangue has a plastic feeling when touched by hand, but its toughness is very strong, and it will not tear when pulled hard. Take it in your hand, it is softer than ordinary fiber paper products. Their raw materials are not traditional pulp, but stone.
The limestone, which is made of coal gangue and tailings slag, is crushed, screened and ground to form ultrafine modified ore powder. After calcination into quicklime with a calcium content of 57% or more, it is ground into nanometer ultrafine whitening powder and added. 20% of specific PE, PP and other additives are processed by special processes such as casting and stretching, three-layer co-extrusion, blow molding, and stone paper goods.
The paper's scientific name is 'environmental synthetic paper', and its raw material is limestone. The stone content of each paper is about 70% to 80%. The characteristics of the stone wrapping paper material give it special properties. The stone carton made of this paper has a particularly high compressive strength, folding resistance, waterproofness and integral molding. According to statistical analysis of the data, the synthetic calcium polymer board has a burst strength of up to 264 KPa and a double side pressure strength compared with ordinary corrugated board. Even in the environment of minus 40 degrees Celsius to minus 80 degrees Celsius, the stone carton will not be deformed and damaged, especially suitable for the transshipment packaging of fruits, vegetables, frozen seafood and so on.
The biggest feature of large wrapping paper is environmental protection. Since the entire production process is a physical change, complete zero emissions are achieved. In terms of water use, traditional papermaking consumes 100 tons of fresh water per ton of paper produced, while the entire production process of the stone paper goods process does not require water. In the raw materials, the main raw material of traditional papermaking is forest and grass resources, and the main raw materials of the stone paper production process are coal gangue, slag and other stone materials. The amount of stone wrapping paper produced by one ton of stone is equivalent to 20 trees. The most important thing is that the product can be recycled indefinitely. After the used carton is recycled, it can be directly crushed and processed without causing secondary pollution. Stone paper is not only non-flammable, but the only product produced after combustion is white calcium carbonate powder, which can be used as a raw material.
A seemingly simple stone board production line is supported by a number of production technology invention patents and new equipment patents. The solid waste such as coal gangue and tailings slag is consumed cleanly, and all are made into recyclable “green”stone paper goods.