An electromagnetic shielding room is designed to specifically shield certain electronic devices after use, which may be subject to interference but are not affected by other devices. What are the things to pay attention to during the construction and installation of this equipment? Next, let's follow the editor to take a look at the relevant issues of electromagnetic shielding rooms.
Use continuous welding to join the metal shielding layer into a complete hexahedron. According to the technical requirements for shielding attenuation, single-layer or double-layer shielding bodies can be used. The double-layer welded shielding room requires a 25mm thick wooden keel to be installed between the two layers of metal shielding bodies.
The issues to be noted in the welding shielded room project include: continuous welding, which requires the weld seam to be continuous and dense, without virtual welding or missed welding; When using double-layer shielding, the fixing screws between the inner shielding body and the wooden keel, and between the outer shielding body and the wall filling layer, need to be welded firmly to the shielding body to maintain its continuity and avoid electrical short circuits caused by screws between the inner and outer shielding bodies. The wood used in the shielding room structure should be treated for fire prevention, and the welding flux residue should be cleaned after welding
(1) When the frequency of disturbing the electromagnetic field is high, the vortices generated in non-metallic materials with low resistivity form a damping effect on the external electromagnetic waves, thereby achieving the effect of shielding the cabinet.
(2) When the frequency of interfering with radio waves is low, high permeability data should be adopted to constrain the magnetic field lines that are shielding the outside of the cabinet and prevent them from dispersing into the shielding cabinet.
(3) In some places, if it is requested to have excellent shielding cabinet effectiveness for both high-frequency and broadcast electromagnetic fields, it is often adopted to form a multi-layer shielding cabinet without the same non-metallic materials.
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