A very low frequency radio wave shielding test device

Abstract

Disclosed is an extremely-low-frequency radio wave shielding test device. The device comprises a radio wave shielding cylinder and an in-cylinder test coil, the in-cylinder test coil is located in the radio wave shielding cylinder, the radio wave shielding cylinder comprises a first cylinder end cover, a second cylinder end cover, a thick-wall metal tube, screws, a dual hole cover and a shielding cover, the first cylinder end cover, the thick-wall metal tube and the second cylinder end cover are fixed into a whole through the screws to form a shielding cavity body portion of the extremely-low-frequency radio wave shielding test device, a disc support supporting a test solenoidal coil, a protective casing located outside the test solenoidal coil, the test solenoidal coil and a round tube used for winding of the test solenoidal coil are distributed in the in-cylinder test coil from outside to inside, a tube support and a test tube are arranged in a hole of the round tube, and the tube support is used for supporting the test tube. The extremely-low-frequency radio wave shielding test device is wide in shielding range, integrally airtight and high in shielding properties, good in shielding effect on medium and low frequency band radio waves, and applicable to professional laboratories.

Description

technical field [0001] The invention relates to the field of radio wave shielding, in particular to an extremely low frequency radio wave shielding test device used as an electromagnetic detection screening test for each coil component on a three-dimensional search coil sensor of a satellite low-frequency electromagnetic wave detector. Background technique [0002] Low-frequency radio wave shielding technology refers to: using the high conductivity of good conductive materials and the characteristics of an equipotential shielding body to form a relatively clean electromagnetic space area, which is used to shield the external alternating radio waves in a specific space area to its internal interference such as leakage of radio waves. . For extremely low frequency radio waves of the order of 10Hz, due to the unfavorable factors such as the obvious increase of the skin depth of the radio wave leaking into the shielding conductor layer or the obvious thickening of the surface cu...

AI Technical Summary

Problems solved by technology

However, in the current laboratory environment, it is difficult to simulate the real physical environment and low-interference physical background of outer space, and it is even more difficult to achieve a higher standard of strict index detection

The background low-frequency electromagnetic noise is less than 10 -5 nT / (Hz) 1 / 2 For example, in order to realize the strict detection and calibration of the low-frequency radio wave detector equipment in this band, it is necessary to have a device that can shield the extremely low-frequency radio wave and at the same time perform basic testing, screening and calibration of the sensor search coil of the detector. At present, only the unconventional metal shielding tube thickened shielding method can be used in the laboratory to simulate the space environment that meets this electromagnetic index.

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