Extremely-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, which is used as an electromagnetic detection and 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: use the high conductivity of good conductive material and the characteristics of equipotential shielding body to form a relatively clean electromagnetic space area, which is used to shield the external alternating radio wave of a specific space area from interference such as radio wave leakage generated inside it . For extremely low-frequency radio waves on the order of 10 Hz, due to unfavorable factors such as the obvious increase in the skin depth of the radio wave leakage inside the shielded conductor layer or the obvious thickening of the s...

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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