In order to effectively prevent the impact of various electromagnetic radiation on electronics and measuring instruments, and to ensure the safety of some data, many departments will take some precautions and choose some shielded rooms, which can avoid interference with the normal equipment of the adjacent computer room. Shielding is to surround the signal source with a metal mesh or a metal plate, and the metal layer is used to prevent internal signals from being emitted, and at the same time, it can also prevent external signals from entering the metal layer. So what is the design principle of the c-level standard of shielded room? The following is shared by the staff:
The shielded room can apply the shielding effect to the network and data room, and there is the current shielded room. According to the shielding performance of the computer room, the shielded computer room can be divided into different levels.
The design principle of the C-level standard of shielded computer room is: a shielding room or shielding cage with 6 interfaces made of a metal mesh or metal plate with good conductivity to surround the computer equipment that generates electromagnetic radiation and well ground, to suppress and block the propagation of electromagnetic waves in the air. A well-designed and installed shielding room has a relatively good shielding effect on electromagnetic radiation. A high-performance shielding room has a shielding effect of 140dB for electric fields, 120dB for microwave fields, and 100dB for magnetic fields. The problem that hinders the universal application of shielding technology is that the design, installation and construction requirements of the shielding room are quite high, and the cost is very expensive. Generally, the cost of a shielding room on a field of 20 to 30 square meters requires tens to millions of yuan. Therefore, the shielding technology is more suitable for occasions where some large-scale computer equipment or multiple small computers with high confidentiality requirements are more important, such as national defense military computing centers, large military command posts, and computing centers of intelligence agencies.
The shielded computer room is constructed in accordance with the "C" level shielding standard. The entire computer room is surrounded by metal steel plates, including the ground and ceiling, and is called a shielded shell. The shielding shell is the main component of the shielding room. According to the specific situation, you can also add a data encryption device inside the computer room to encrypt the transmitted data, so that even if it is outside the shielded computer room, the data is not easy to be stolen. At the same time, according to the importance of the computer room, intrusion detection systems, access control and video surveillance systems can also be added to improve security. Electromagnetic shielding measures should be taken during design. The shielded computer room uses metal plates to form a fully enclosed hexahedron, and is equipped with a new type of shielded door, ventilation system, communication transmission system, electric lighting system and other auxiliary facilities.
The design principles of the above-mentioned shielded computer room C-level standard are shared here. The shielded computer room can be divided into national standard and military standard according to performance standards; the national military standard GJBZ20219-1994 is further divided into B and C in performance. The shielding performance of the C-level shielded computer room is the highest. Shielding the computer room can make the magnetic field extremely weak, and maximize the attenuation of the electric field and plane wave microwaves.