摘要:
The present invention discloses a joint structure between the wall elements of a light-weight magnetically shielded room. In the joint structure, the end of the aluminium plate of the element is stepped and its surface roughened. In addition to this, the aluminium plate is coated, for example, with tin to improve the electrical contact. The joint includes µ metal plates which are used to make a magnetic contact between the µ metal plates of the elements. The compression force achieved by means of bolts is transmitted to the joint by means of an aluminium moulding. The non-continuous compression force is balanced over the entire joint area by using presser rubbers. The joint structure is protected by means of supporting profiles which are used to electrically couple the thinner aluminium plate of the sandwich type wall element to the thinner aluminium plate of an adjacent element. The thinner aluminium plate and the supporting profile can also be coated, for example, with tin to improve the contact.
摘要:
The invention relates to a magnetic filler material (118) for bridging gaps (114, 118) in magnetic shields for shielding static or low frequency magnetic fields. The magnetic filler material (118) comprises at least one matrix material (310) and at least one magnetic component (318) embedded in the matrix material (310). The magnetic component (318) has magnetically shielding properties.
摘要:
An improved radio frequency wave attenuating wall (ceiling or floor) or door material comprises a laminated structure having as an integral part thereof one or more layers of a viscoelastic material which also functions as a glue and one or more electrically conducting layers. An electrically conducting material such as tape or a formed metal channel provides an electrical connection between the electrically conducting material and an exposed outer surface of the laminated structure. In one embodiment the electrically conducting material is paint. In one embodiment, standard wallboard, typically gypsum, comprises the external surfaces of the laminated structure and one or more conductive layers are constructed between the gypsum exterior. In one embodiment, the conducting layer material is selected to provide physical security in addition to radio frequency wave attenuation. The construction is such that acoustical attenuation is also achieved.
摘要:
A radio wave shield 1 includes three kinds of antennas 4a, 4b and 4c respectively for selectively shielding radio waves of specific different frequencies. The first antenna 4a, the second antenna 4b and the third antenna 4c have radio wave reflecting spectrum peaks continuous to one another.
摘要:
Die elektromagnetische Abschirmung ist für einen Raum oder ein Gebäude vorgesehen und besteht aus überlappend angeordneten und leitend miteinander verbundenen elektrisch leitenden Geflecht- oder Gitterabschnitten (1-4), die mit Erdpotential elektrisch verbunden sind und die im Überlappungsbereich gefalzt ausgebildet sind, derart, dass die Falze benachbarter Geflecht- oder Gitterabschnitte (1, 2) im Quer schnitt hakenförmig ineinander greifen.
摘要:
An electromagnetic interference shielded panel (20) and method of manufacture. The panel includes one or more frame members (24) having a rib (98) adapted to provide sacrificial material when a first skin member (120) is welded to the frame member. The first skin member is welded to the frame members of a frame assembly (22) prior to bonding of a core member (160) and a second skin member (140) to the first skin member and frame assembly.
摘要:
The mass, as that of any conventional concrete, is based on cement, aggregates, water and chemical additives that modify the properties of the concrete. According to the invention, the mass uses magnetite as an aggregate, with a highly continuous grain size in order to obtain an optimum homogeneity of the mass as well as a high density which provide an optimum barrier effect against radiation, allowing to reduce substantially the thickness of the wall required without affecting the barrier effect. The mass is ideally suited for obtaining poured concrete, concrete for bricks, concrete for slabs and dry mortar used to build radioactive premises such as radiotherapy and brachytherapy bunkers, radiology walls, etc.
摘要:
A panel of electromagnetic shielding material for use in shielding a building structure or other enclosure from electromagnetic radiation, includes two layers of bitumen bonded to, and on opposite sides of, an electromagnetic screen having a plurality of electrically-conductive strands interwoven into an open mesh with the bitumen filling the openings in the mesh. Also described is a method of electromagnetically shielding an enclosure defined by a plurality of walls, by: applying to one or more walls of the enclosure bitumen panels of electromagnetic shielding material having two layers of bitumen bonded to, and on opposite sides of, an electromagnetic screen of a plurality of electrically-conductive strands interwoven into an open mesh with the bitumen filling the openings in the mesh. Further described is a method of shielding an enclosure defined by a plurality of walls, by applying to one or more walls of the enclosure an electromagnetic screen including a plurality of electrically-conductive strands interwoven into an open mesh; and applying a layer of plaster over the screen.
摘要:
The apparatus (50) includes an enclosure (24) having the wall (26) defining an interior and an exterior of the enclosure (24). The layer (52) of the highly magnetically permeable material is located closer to the interior of the enclosure (24) than is layer (54). The background field magnetometer (56) is positioned within the enclosure (24). An electrical coil structure (62) is made to provide the most complete cancellation of a particular background magnetic field.