Low frequency wave band magnetism shielding cylinder
A magnetic shielding cylinder and shielding cylinder technology, applied in shielding devices and other directions, can solve the problems of difficult to achieve strict detection indicators, difficult to simulate the low-noise background of the physical environment of outer space, etc., and achieve the overall airtight and shielding performance. The effect of precision detection and reasonable structure design
Inactive Publication Date: 2013-12-25
NAT SPACE SCI CENT CAS
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Problems solved by technology
At present, it is still difficult to simulate the real physical environment and low-noise background of outer space in the laboratory of the urban environment, and it is also difficult to meet the strict indicators required for testing.
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[0055] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and realized through the following technical solutions.
[0056] Due to the particularity of the magnetic shielding cylinder in the low frequency band, except for the necessary connecting signal lines, connectors and test pieces, other equipment in the shielding cylinder must use products made of non-metallic materials with extremely high resistivity.
[0057] Such as figure 1 , 2 , 3, and 5, first select high-nickel plate thickness 1.5mm, crimp and weld to make 3 shielding cylinders with different outer diameters and 3 corresponding cylinder caps with closed bottoms, the magnetic shielding cylinder 1 The boundary between the bottom 59 of the shielding tube and its side wall, and the bottom of the tube cap 10 and its side wall all form a circular arc-shaped transitional circumferential band, and the radius of curvature of the circumferential ban...
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The invention discloses a low frequency wave band magnetism shielding cylinder. The equipment comprises a magnetic shielding cylinder (1), a cylinder cap (10) and a cylinder support (16). The magnetic shielding cylinder (1) comprises an outer-layer aluminum shielding cylinder (2) and a multilayer Fe-Ni alloy inner layer shielding cylinder (3). The cylinder is characterized in that the shielding cylinder also comprises an irony shielding cylinder (25), a slide cradle system (4) and a mobile indicator (15) which is out of the cylinder; the cylinder cap (10) correspondingly comprises an outermost layer of aluminum shielding cylinder cap (12), an iron shielding cylinder cap (6) and a multilayer Fe-Ni alloy inner layer shielding cylinder cap (11) from outside to inside; each layer number, external diameters and thicknesses of each layer of the shielding cylinder of the magnetic shielding cylinder (1) and the docking and closed cylinder cap (10) are the same. The shielding cylinder of the invention has the advantages that the structure of the low frequency wave band magnetism shielding cylinder is designed reasonably; applicability is good and operation is simple; mechanical cooperation precision of the low frequency wave band magnetism shielding cylinder and configured accessories is high and part hole leakage is small; detection with the high precision is easy to be realized; a shielding scope of the low frequency wave band magnetism shielding cylinder is wide; a middle-low frequency-band electromagnetic shielding effect is good, overall sealing and shielding properties are good; the shielding cylinder is suitable for being used in a professional laboratory.
Description
technical field [0001] The invention relates to a magnetic shielding cylinder with a cylindrical structure which can be easily used for magnetic shielding in the low frequency band, and in particular to a low frequency magnetic shielding cylinder suitable for use in indoor electromagnetic detection tests by satellite low frequency magnetic wave detector sensors. Background technique [0002] Low-frequency magnetic shielding technology is realized by using ferromagnetic materials with high permeability and small reluctance to shunt the disturbing magnetic field. Ferromagnetic materials such as iron, silicon steel sheet, permalloy, etc. are usually used for magnetic field shielding. Magnetic shielding can adopt plate-shaped, box-shaped, cylindrical, and column-shaped shielding bodies. Commonly used shielding technologies include multi-layer shielding and film shielding. [0003] Since the space waves to be detected by scientific detection equipment such as space-borne low-fr...
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IPC IPC(8): G01R1/18
Inventor 董伟沈超陈涛路立
Owner NAT SPACE SCI CENT CAS
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