Previctry Premises Wiring System Experts

Shield Machine Room Solutions

1 . The technical basis and design principles
Ⅰ.the technical basis
GB12190-90 < high-performance shielding enclosures shielding scheme >
YDJ26-89 telecommunications standards of the People's Republic of China "(TongXinZhan) grounding design communications agency (dca) technical regulations > provisional
BMB3-1999 "being handled.the information processing technology of electromagnetic shielding room to sum test >
GB50222-95 < building interior decoration design specification > fire
GB8702-88 electromagnetic radiation protection regulations >"
GB9361-88 < > computer site safety requirements
GB6650-86 < computer room with floor technology conditions >

Ⅱ . electromagnetic shielding room working principle:
Waves during transmission, alternation of alternating electric field, magnetic field and in their attempts to have good grounding of ferromagnetic materials with good properties of conductive shield, the electric energy shell is grounded conductor through decays, magnetic energy by magnetic material in the vortex loss, and the detection unit (invitation and bear the expenses is larger strength) (about 30 times the attenuation to 100,000 times and electromagnetic shielding). (segregation)

2 steel welding structure scheme: the electromagnetic shielding room (customizable)

Steel welding type electromagnetic shielding room structure: welding structure of shielded enclosure is by different specifications of steel plate thickness module (2 ~ 3mm) mutual welding into one. According to different parts of the bearing capacity of shielding shell and design of different load torque steel keel of the support for shielding shell longmen framework, its biggest characteristic is just strength, stability and reliability than the extent and other structures of shielded enclosure, and shielding effectiveness is much higher.

Steel welding type electromagnetic shielding room index :
Magnetic field, Electric field, The plane, Microwave,
150KHz; 14KHz frequency - 50MHz; 200KHz - 1GHz; 50MHz -- 1GHz 10GHz --
Shielding effectiveness 75dB p, P 100dB, P 110dB, 100dB acuity
Shielding effectiveness: to exclude or shielding electromagnetic constraints. For a given external sources, shielding effectiveness refers to a designated in the test before and after the shield in the electric field or magnetic field intensity. Usually in the form of the incident and the decibel transmission of signal amplitude of the board.

3 steel shield materials:

Electromagnetic shielding electromagnetic shielding, is rather electrostatic shielding refers to the electrostatic shielding. Electrostatic shielding requirements must be grounded shield. Effects of the electromagnetic shielding effectiveness shield shield grounding or not, but the shield conductive continuity. Destruction of conductive shield continuity of different parts of the shield juncture, open, etc. Therefore, electromagnetic shielding the conductivity of the requirements of shield than electrostatic shielding strictly.
According to the relative electrical conductivity, different materials, and the relative magnetic conductivity absorption loss coefficient reflection losses, etc, the choice to shield room shield of iron sheet metal materials, thick as 2mm. Using the same material 3mm ground for shielding layer thickness of steel.
Considering the shield of shielding materials are also factors both electromagnetic shielding the mechanical properties of the whole room, design requirements: steel than 4mm/M2 unevenness, shields, and than 10mm verticality shield 8.0 earthquake p.
According to different parts of the bearing capacity of shielding shell, and design of different sectional area of rectangular steel keel of strengthening support for shielded by 30 *, keel 40mm rectangular tubes attached to shield wall plate welding.
Shield raw materials (steel) processing production into the unit module, scene by fusion welding process of continuous carbon dioxide (Co2) protect welding
The characteristics: the welding materials narrow range, deformation, closely, surface without welding slag. Ensure shielding layer module of shielding effectiveness seams plate with block units
Self-stipulation of shielding layer is consistent, but also can improve the corrosion resistance of the electrochemical weld. (electrochemical corrosion cause reduced shielding effectiveness and intermodulation effect, because
For electrochemical reactions of semiconductor material compound is nonlinear, this generates signal frequency mixing, cause new frequency).

4 The platform screen door

Manual lock screen door 1.0 (2.0 m (a customizable)
Using hinge inserted knife type airtight door, door lock point for point manual locking structure, Using single-pole plug-in electromagnetic sealing technology, composite blade, the removable type quality beryllium bronze reed, good maintainability, Door plank of internal and external insulation mechanism of double-layer door, using inferior smooth stainless plate surface decoration.

5 Ventilation and air conditioning system and distribution system

6 Shielding enclosures communication system and interface device

7shielding shell grounding

Shielding ground: in order to make the body wall surface induction current shield (static) can quickly and effectively reduce the frequency of the wall, and the earth shield connected to electric circuit, and formed the charge for shield provides a low impedance bleeder pathways. The resistance to general shielding Ω than 1.

8 Interior decoration and indoor electrical system

9 Room distribution box and fire alarm systems

10 Insulation and monitoring system

I Electromagnetic shielding chamber bottom USES 80 x 80mm insulation spacers will raise body electromagnetic shielding room with ground insulation.
From the safety of engine can be considered for video camera can be installed, and monitoring system, reserve 2 waveguide as video surveillance interface mouth.